Winch Structure Design

20 ton winch for sale

Working conditions of AQ-JYB transportation winch

The AQ-JYB transport winch is composed of motor, drum device, working brake, safety brake, clutch, depth indicator, base, and shield. The transmission system consists of a motor, motor gear, small internal gear, coupling gear, planetary gear, large internal gear, bearing bracket and base. Using planetary gear drive, the winch has the features of compact structure, good rigidity, high efficiency, convenient installation and movement, stable starting, flexible operation, reliable brake and low noise.

Ellsen Hydraulic Drilling Winch for Sale
Hydraulic Drilling Winch for Sale

The use of AQ-JYB transportation winch is increasing, and the information about the AQ-JYB winch is also concerned by the enterprises and drivers.

The following is a brief introduction to the structure of the AQ-JYB winch.

Motor: the power of the winch working.

Drum device: a differential gear train and a fixed axle gear train are used as the transmission mechanism of the winch, and the outer part is used for winding the wire rope.

Work brake: when winch works, it can brake the winch drum without stopping by hand operation.

Safety brake: when winch works, it can brake the winch drum when there is an emergency or failure.

Clutch: through the operation of the hand, it can control the operation and stop of the winch.

Depth indicator: can indicate the location of the drawworks tramcar.

Base: it can fix the motor, reel device, work brake, safety brake, clutch, depth indicator and other components.

Any questions you want to ask for the winch structures, Excellent winch engineer will tell you in time, be free to contact us

Winch Features

Single drum winch made in China Elslen Winch Factory

The winch is an electric crane with small size, light weight, heavy lifting, flexible operation, safety and reliability, and durability. It is widely used in construction sites such as construction, bridges, metallurgy, mining, ports, and power plants. This machine is widely used in materials lifting and large-scale hoisting projects. It can also be used to drag various materials on slopes or flat grounds.

marine trailer winch for sale
marine trailer winch for sale

The main products are:

JM electronically controlled large-tonnage winch hoist, JM electronically controlled slow hoisting machine, JK electronically controlled high-speed winch, JKL hand-operated fast-sliding winch, 2JKL hand-operated double-quick winch hoist, electronically controlled hand-operated dual-use winch, JT speed control Winches, KDJ miniature winches, etc. can only be used on the ground and can be modified for use on board.

It is powered by an electric motor. It is equipped with an elastic coupling, a three-stage closed gear reducer, and a tooth-coupled coupling to drive the reel. Electromagnetic brakes are used.

The product is high versatility, compact structure, small size, light weight, significant from the point of use, easy to use transfer, is widely used in construction, water conservancy projects, forestry, mining, docks and other materials lift or drag, but also for modern electronic control Automatic line equipment.

JM series gear reducer drive winch. Suitable for construction and installation companies, mining areas, factories and civil engineering and installation work.

A device that is driven by human or mechanical power to drive a reel or take up a rope to complete the traction work.

Slow winch: The winch with a rated speed of 1~12m/min for the wire rope on the reel.

High-speed electric winches: Winches with a rated speed of approximately 60m/min on the drum.

Electric winch: A winch driven by an electric motor that rotates the drum through a drive device.

Variable speed winch: speed control adjustable hoist.

Hand winch: A hoist driven by manpower to turn the drum by means of a drive.

Large-tonnage non-standard winch: mainly used for hoisting, pulling, unloading, pushing, and dragging heavy objects. Such as installation and dismantling of large and medium-sized concrete, steel structures and mechanical equipment.

Its structural characteristics are: wire ropes are arranged in an orderly manner, reliable installation and installation, applicable to piers, bridges, ports and other roads and bridges and large-scale factories and mines to install equipment. It is an external force (such as a motor) to drive him to run, and then through electromagnetic brakes and locks. The brake controls that it is not free to operate without power. At the same time, after being decelerated by the motor, it drives a wheel to run, and a reel or other thing can be coiled on the wheel.

Generally, hoists with more than 30 tons of hoisting capacity are large-tonnage hoists. There are only a few hoisting machines that produce large tonnage in China. The current maximum tonnage is 65 tons. Mainly subdivided into JK (Fast), JM, JMW (Slow), JT (Speed ??Adjustable), JKL, 2JKL Manual Control and other series winches, widely used in industrial and mining, metallurgy, lifting, construction, chemical industry, road and bridge, and hydropower Installation and other lifting industries.

Winch Parts Installation

2 Tons Aq-JK Variable Speed AC Winch for Slae

Winch reducer (ZHLR-170), main motor installation

The winch reducer (ZHLR-170), the main motor installation ZHLR-170 type reducer Its structure is two pairs of herringbone pairs. Box body. Cover, reducer and spindle connection using gear coupling, installation should be Based on the spindle half coupling. 1. Clean the base surface, place the horn, check the elevation and level of the horn, if it does not meet the requirements, it should be processed immediately.
The ZHLR-170 type reducer is composed of a double herringbone gear pair, a box body, and a box cover. The gear reducer and the main shaft are connected by a gear coupling. The installation should be based on the shaft half coupling.

AQ-JM Hydraulic Windlasses for Sale
AQ-JM Hydraulic Windlasses for Sale

1. Clean the base surface, place the horn, check the elevation and level of the horn, and if it does not meet the requirements, it shall be processed immediately. The elevation of the horn shall be determined according to the elevation of the centerline of the spindle.
2. Correct the leveling of the reducer, use the spindle half coupling as the reference to correct the output shaft half-coupling of the reducer, and use the squareness level to check the level of the reducer housing to the processing surface. If it does not meet the requirements, it shall adjust its inclined horn until it is qualified. The level error of the output shaft should not exceed 0.5/1000; 2. The triaxial should be geared well; the horizontal and vertical levels of the box must not exceed 0.15/1000.
3. After leveling, correct the output shaft of the reducer and the two-axis bearing bushes. First, scrape large bearings, then scrape two. Three-bearing, scraping two. Three-branch time and fine-grained gear meshing precision work in conjunction with the method of wiping the tile above, check the gear meshing conditions: contact surface and position inspection using coloring The method of checking the meshing gap is performed by using a feeler gauge and lead pressure method. If the gear meshing accuracy does not meet the requirements, run-in grinding is required. This work can be performed during the test run.

hydraulic marine anchor windlass for sale
hydraulic marine anchor windlass for sale

4. Clean the gear and the inside of the box and wipe it clean.
5. Check the measurement meshing clearance, contact accuracy, bearing clearance and other data, and make a record.

Main motor installation

The connection between the main motor and the speed reducer adopts a serpentine spring coupling. The installation of the main motor should be leveled and aligned with the half shaft coupling of the input shaft of the reducer.
1. Clean the foundation surface and place the horn. The elevation of the horn should be the elevation of the centerline of the half shaft coupling of the input shaft of the reducer. If there is any error, adjust the angle of the horn to meet the requirement.

cable marine drum winch for sale
cable marine drum winch for sale

2. After the motor is in place, put on the anchor bolts. After leveling and aligning, tighten the anchor bolts to check the contact condition of the bearing bushes, wipe the tiles and adjust the upper shoe clearance as required.
3. At the same time when scraping the tiles, attention should be paid to the direction of the leveling and the fine adjustment. Pay attention to the gap between the rotor and the stator of the motor. The left and right gaps should be equal, and the lower gap should be larger than the upper gap.

More information you want to know about the installation details, be free to contact us.

Winch Tech Breakthrough

AQ-JKl Pilling WInch For Sale

The Excllent winch realizes the effective unity of product performance and technological innovation

In the upsurge of the development of the construction project, the electric hoist is increasingly showing the unparalleled advantages of both the double barrel hoist or the frequency conversion hoist. Our company is constantly enhancing its strength in the process of following development and progress, and actively learning the technological level of developed countries, making efforts to carry out technological innovation to achieve progress in products and services.

Hydraulic Drilling Winch for Sale
Hydraulic Drilling Winch for Sale

 

The electric hoist is the earliest lifting product in mining machinery. Because of its simple structure and reliable operation, it is an essential equipment in metallurgy, chemical industry, building materials and other industries. Excellent brand electric winch with balance precision design and adjustment of the discharge mouth fast and many other advantages to guarantee the low cost of economic operation of lifting, lifting to ensure quality at the same time to perfect the dynamic design of lifting performance further improved, realized the unity of technological innovation and product performance.
One of the heavy equipment hoisting machines is more economical and practical equipment whether many hoists, lifting the hard rock, recycled materials, gravel or various ores, electric winch all comers. The best lifting performance is high lifting ratio, high passing rate, and adapts to a variety of feeding conditions so that the material can be weighed many times and improve the lifting performance. Our firm selects the most advanced manufacturing materials. The electric control hoist is driven by a motor.

Dual Drum Piling Winch for Sale
Dual Drum Piling Winch for Sale

It is driven by elastic coupling, three-stage closed gear reducer and toothed coupling drive drum, and the electromagnetic brake is adopted. From the design – production – the internal inspection – the factory has the strict control. The product has many advantages such as high universality, compact structure, small volume, lightweight, great importance and convenient use and transfer. It is widely used in material lifting or leveling for building, water conservancy, forestry, mining, wharf, etc., and it can also be used as a supporting equipment for modern electric control automatic operation line.One of the heavy equipment hoisting machines is more economical and practical equipment whether many hoists, lifting the hard rock, recycled materials, gravel or various ores, electric winch all comers.

The best lifting performance is high lifting ratio, high passing rate, and adapts to a variety of feeding conditions so that the material can be weighed many times and improve the lifting performance. Our company selects the most advanced manufacturing materials. The electric control hoist is driven by a motor. It is driven by elastic coupling, three-stage closed gear reducer and toothed coupling drive drum, and electromagnetic brake is adopted. From the design – production – the internal inspection – the factory has the strict control. The product has many advantages such as high universality, compact structure, small volume, light weight, great importance and convenient use and transfer. It is widely used in material lifting or leveling for building, water conservancy, forestry, mining, wharf, etc., and it can also be used as a supporting equipment for modern electric control automatic operation line.

Winch drum material selection

Single Drum Piling Winch for Sale

Reel shaft material selection

There are many kinds of materials in the shaft. The design is mainly based on the requirements of the shaft strength, stiffness, wear resistance and other heat treatment methods to achieve these requirements, taking into account the manufacturing process to be selected, and strive to be economical and reasonable.

Dual Drum Piling Winch for Sale
Dual Drum Piling Winch for Sale

Common materials for the shaft are 35, 45, 50 high-quality carbon steel, the most commonly used is 45 steel. For smaller or less loaded axles, common carbon steels such as A3 and A5 can also be used. For larger forces, shaft size and weight restrictions, as well as some special requirements of the shaft, the alloy steel can be used.

Ductile iron and some high-strength cast iron, cast because of good performance, easy to cast into complex shapes, and good damping properties, stress concentration sensitivity is low, the impact of fulcrum displacement is small, it is often used to create complex shape of the shaft.

In particular, the rare earth-magnesium ductile iron developed in our country has the advantages of good impact toughness, reduced wear, vibration absorption and less sensitivity to stress concentration. It has been used to make important shaft parts on automobiles, tractors and machine tools.

Doule drum anchor winch for sale

Depending on the working conditions, the shaft may be subjected to overall or surface treatment before or after processing as well as surface strengthening treatment such as shot peening and chemical treatment such as carburizing, nitriding, nitriding, etc. to enhance its strength Especially fatigue strength) and wear, corrosion resistance and other properties.

At normal operating temperatures, the modulus of elasticity of alloyed steel is similar to that of carbon steel, so alloy steel is not suitable for increasing the rigidity of the shaft.

Winch with Single drum
Winch with Single drum

Shaft generally by the rolling of steel or forgings by cutting manufacturing. Shaft diameter smaller can be made with round bars; For important, large diameter or step diameter larger shaft, using forging billet. To save metal and improve workmanship, large diameter shafts can also be made hollow, with welded or forged flanges.

For the shape of the complex axis (such as camshaft, crankshaft) can be cast. Depending on the job requirements, the spool axis plays the role of support reel, gear, and ratchet. So choose 45 steel (quenched) as the mandrel material. 45 steel (quenched and tempered) performance parameters (3-4).

 

Winch Maintenance Center

AQ-JM80t cheap electric winch  for vietnam client

Hoist, winch common causes of failure and repair (highlights)

Hoisting winch machine, winch common causes of failure and repair (highlights) repair of the cause of the malfunction, the brake two, reducer three, spindle device four, hydraulic station other

 

Malfunction The reason Repairement
Braking device
1. Brake is not released (no release) No oil pressure or insufficient oil pressure

Brake seal damaged

1. Check the hydraulic station

2. Replace the seal

2. Brake loosen and working slowly 1. Hydraulic system with air

2. Valve is not in normal position, or oil is polluted

3. Brake shoe clearance is too large

4. Oil is too thin, or oil spill too much

5. The seal is damaged

1. In the braking state, deflate at the highest point

2. Inspect and clean valve and system

3. Redial the gap

4. Change the oil, check and repair the hydraulic system

5. Replace the seal

3. The brake can not work 1. Hydraulic station and piping have problems

2. The brake is damaged and the liner with the cylinder stuck in the cylinder

1. Check and repair the hydraulic station

2. Check and repair the brake

4. Braking time or brake taxiing distance is too long, the braking force is small 1. The load is too high or the speed is too high

2. Brake shoe clearance is too big

3. There is paint or the like on the brake disc and shoe

4. All brakes do not move

5. Spring group defective

6. Seal wear

1. Check if it is overloaded and the speed is too high

2. Adjust the gap

3. With polyethylene brake disc, replace the sticky oil brake shoe

4. Check the hydraulic station

5. Replace the spring

6. Replace seal and inspect all sealing surfaces

5. Brake shoes uneven wear 1. Brake calibration is not uniform

2. The brake disc deflection is too big, string or spindle tilt larger

1. Check the installation technical requirements

2. Heavy car brake disc, check the spindle tilt angle adjustment and bearing

6. Brake shoes accidental wear 1. Increase the use of brakes

2. Brake shoe clearance is too small

3. The brake cannot be released evenly

1. Check the electrical brake, the speed limiter work, driver operation is correct, check the load speed and braking frequency is correct.

2. Adjust the brake shoe clearance

3. Check the hydraulic pressure and piping

7.The hydraulic station is not working properly 1. Oil is not clean

Long-term operation

1. Clean the solenoid valve and change the hydraulic oil

2. Strengthen the heat

Malfunction The reason Prepayment
Reducer
 8. The bearing is wearing hot. 1. Uneven bearing clearance or damage

2. The oil is not enough or unclean

1. Adjust the gap, or replace

2. Come on or change oil

9. Reducer noise or vibration 1. Bearing clearance is too large

2. Gear wear is too large, poor lubrication

3. Overload, speeding operation

4. Reducer bolt loose

5. The reducer into foreign objects, damaged tooth surface, tooth shape

1. Adjust bearing clearance

2. Replace the gear, in accordance with the requirements of the replacement of suitable lubricants

3. Winch as required

4. Check and tighten the bolts in all parts

5. Clear foreign objects, file repair was deformed teeth

10. Reducer leakage 1.Too much fuel

2. Union bolt, fastening bolt is not compressed

3. The seal is damaged

1. The oil level does not exceed the middle gear 1-2 tooth height

2. Check the fastening

3. Replace the seal

Winch Baring Device
11. The drum gives an abnormal sound 1. Coupling appears loose or broken, resulting in relative vibration

2. Weld cracking, deformation

3 roller lining wood damaged

4. Local stress is too large, the connector loose or broken

1. Tighten, repair or replace

2. Welding repair, reduce the load or reinforcement on the drum

3. Replacement roller lining wood

4. Reinforced inside the drum reinforcement

Other Problems

12. Hoist noise 1. Concentricity cannot meet the requirements

2. Hoist overload, speeding operation

3. Poor lubrication

1. Check the adjustment

2. Reduce the amount of lifting, according to the rules of operation

3. To enhance lubrication

13. Lifting powerless, motor fever, current exceeds the rated current 1. Operating voltage is too low

2. Hoist overload operation

3. Motor cooling is bad

4 three-phase current imbalance

1. Increase the diameter, shorten the hoist and transformer distance

2. Reduce the amount of lift or reduce hoist speed

3. Strengthen the heat

4. Check processing

14. Wire rope arrangement is not normal 1. Elevator installation skew (day wheel and roller centerline deflection)

2. The spindle is not horizontal

3. Winding rope too much

4. Hoist distance from the wellbore too close

1. Adjust

2. Adjust the spindle level

3 according to coal mine safety regulations require winding wire rope

4. Reduce the winding width

15. Hoist vibration 1. The axis of the coupling between components is not concentric

2. Anchor bolt is not fixed

1.Check the adjustment

2.Check the fixed

Brake common faults and repairs

Symptoms Possible Causes Repair Method
1.Brake can not be released 1.1 There is no brake oil pressure or insufficient brake oil pressure

1.2 brake seal damaged

Check the hydraulic station

Change the seal

2. Slow brake or brake 2.1 Hydraulic system with air

2.2 hydraulic system spool blocked

2.3 brake shoe clearance is too large

2.4 hydraulic oil viscosity does not meet the requirements, or leak too much

2.5 seal damage

Exhaust the air inside the brake

Check and clean the valve and system

Re-adjust the brake shoe clearance

Change hydraulic oil, check and repair hydraulic system

Change the seal

3. Brake can not brake 3.1 Hydraulic station and oil system is faulty

3.2 Brake damage, the liner with the cylinder card

Repair hydraulic station

Check and repair brake

4. Braking force is too small, braking time is too long 4.1 hoist overload or speeding operation

4.2 brake shoe clearance is too large

4.3 brake disc with oil or other debris

4.4 All brakes cannot move

4.5 Faulty spring group

4.6 ring damage

Check if the load and speed are within the allowable range of the hoist

Adjust the brake shoe clearance

Clean the brake disc or replace the brake shoe with polyethylene solution

Check the hydraulic station

Replace the spring group

Check or replace the seal

5. Brake shoes uneven wear 5.1 Brake calibration is not uniform

5.2 The brake disc deflection is too large or the spindle axial strokes larger, or the spindle inclination is too large

Check whether the installation meets the technical requirements

Turning the brake disc, check the spindle inclination and bearing clearance adjustment

6. Brake shoes accidental wear 6.1 Brake abnormal use

6.2 Brake shoe clearance is too small

6.3 Brake operation is not synchronized

Check the dynamic braking, speed limiter function is correct, whether the provisions of the operation;

Adjust brake shoe clearance.

Check hydraulic pressure and piping.

Hydraulic Station Common Faults and Handling

Order Symptoms Cause of Issue Method of exclusion
1 After the pump is started, the proportional relief valve return pipe is not back to the oil Motor is not turning Change the motor steering
2 When the oil pressure increases, there is a lot of bubbles on the oil surface, meanwhile there is more noise and pressure is not stable Suction port leakage, or suction port oil filter is blocked, increased oil absorption caused by air inhalation Check and handle the suction port seal; clean the suction port oil filter
3 Pump heat, noise, disassembled inspection with oil pan abrasions The gap between the oil pan and the rotor is too small Remove the oil pan and the rotor, the abrasion surface with a flat grinder flattened, with a shim assembly to adjust the gap between the oil pan and the rotor
4 Mainline pressure cannot be adjusted, or suddenly dropped to zero during normal operation Proportional relief valve plugged Clean and clear the proportional relief valve
5 There is a large amount of oil leakage between the valve and the oil collecting block, and the oil pressure drops, so it can not be released Fix valve screw loose Tighten the screw
6 The hydraulic pressure is normal, but the brake cannot be released or only part of it is released Electromagnets G3, G4, G5 required voltage is too low, or the voltage is too high to burn the coil Check the electrical circuit and electromagnet if the coil burns newer
7 After the emergency brake, no pressure or pressure on the main oil line cannot reach the normal value Proportional relief valve spool is stuck, or the pilot valve orifice is blocked, or hydraulic valve spool is core die Clean overflow valve, valve spool movement required to clear the control hole, cleaning hydraulic valve to move the spool required flexible
8 Accumulator hydraulic unable to hold The relief valve spool on the oil collecting block is stuck or the orifice of the relief valve control port to the pilot valve is blocked Clean overflow valve, spool movement required to clear the control hole
9 Accumulator pressure is the same as mainline pressure and not adjustable Pressure relief valve spool is stuck, or the relief valve orifice is blocked Clean the pressure relief valve and unblock the orifice

 

Winch Design Technology

double drum marine hand winch for sale

Design of Mine Hoist Winch Frequency Control System

Winch Factory shall always provide winches with cutting-edge technology. The winch with wireless remote control is one of a smart winch. Right here in this post, the company would like to introduce the technology we have employed in our winch wireless remote control. At present, the mine hoist control system generally adopts the way of winding motor rotor string resistance for speed regulation, and the system has many shortcomings.However, the advantages of frequency control system, which provides a perfect interface circuit, built-in PLC, either with the new system to achieve supporting the use of the old system can also be transformed.

20 ton winch for sale
20 ton winch for sale

At present, mine hoist winch control system commonly uses winding motor rotor resistor string way to speed control, the system has the following disadvantages:

  • A lot of power consumption in the slip resistance, resulting in a serious waste of energy, while the installation of resistors needs to take up a lot of space.
  • The control system is complex, resulting in a high failure rate of the system. The contractor, resistor, and brush of the wound motor are easily damaged and the maintenance workload is heavy, which directly affects the production efficiency.
  • Low-speed and creeping stages need to rely on brake pads friction roller speed control, especially in the load changes, it is difficult to achieve constant deceleration control, resulting in speed control is not continuous, the speed control performance is poor.
  • Start-up and shift shock current, resulting in a large mechanical shock, resulting in the greatly reduced service life of the motor, and extremely prone to “off the road” phenomenon.
  • The degree of automation is not high, increasing the cost of mining, affecting the yield.
  • Low voltage and low speed start torque are small, with poor load capacity, cannot achieve constant torque boost.
  • The use of variable frequency speed control system can be very good to overcome the above shortcomings, this paper to the scenery brand elevator inverter, for example, details of the frequency control system used in mine hoist system solutions.
brand electric winch with remote control for sale
brand electric winch with remote control for sale

The Advantages of Frequency Control System

  • In the range of ± 20% of the fluctuation of the power grid, the constant torque will not increase because of the fluctuation of the power grid.
  • Realize the motor soft-start, start torque, with load capacity.
  • The motor can achieve stepless speed regulation, plus, deceleration process is very smooth, small current impact, greatly reducing the mechanical impact strength.
  • The use of chip unified control and PLC external circuit interface combination, the speed control system with high reliability while using PLC’s powerful control capabilities to achieve flexible control.The use of chip unified control and PLC external circuit interface combination, the speed control system with high reliability while using PLC’s powerful control capabilities to achieve flexible control.
  • In addition to over-voltage, under-voltage, overload, overheating, short-circuit protection itself, but also has a chain of external protection control, including the brake signal and positive and reverse signal chain, inverter fault signal and System safety loop chain, the machine equipped with automatic deceleration procedures.
small electric windlass for sale
n small electric windlass for sale

Interface Circuit

The inverter provides perfect interface circuit, built-in PLC, both with the new system to achieve supporting the use of the old system can also be modified to accept DC 0-5V, DC 0-10V and 4-20 mA industry standard signal.For system transformation, the increase of remote control device can be achieved between the frequency conversion and frequency conversion, monitoring system operation and operational status and other functions. Any information about the detailed information about wireless remote control winch welcome to contact us.

12t Waterfall Winch Successfully Installs on Philippines

single drum light duty manual boat trailer windlass for sale

On May 2, 2017, Excellent waterfall winch is successfully installed on our Philippines’ customers boats. The client has his own business in the marine industry. He sends us quotes for winch used for boats on early days of April. At the beginning, the winch factory did not make clear what types of the winch he needs. Through our winch’s Engineer’s communication with our clients, we know that this client just starts his own business, he did not know quite much about specific parameters of the winch he needs.

Waterfall Winch
Waterfall Winch

In view of this circumstance, we ask more information about the boat’s condition of our clients. Through great efforts our winch experts have made, we finally knew that this client needs a waterfall winch. And according to his boat’s working condition, we recommended him selecting a heavy duty 12t winch, which would perform better to promote his working performance.

 Winch Installating on Philippines
Winch Installating on Philippines

The waterfall winch is a kind of heavy duty hydraulic winch widely used on boats. In our company we can serve you this kind of winch with different configurations and capacities. Whether you have a small boat or a marine ship, we can both meet your demands. If you need winches with customized tons, please tell us more specific information about the working conditions of the winch. Then we will tailor an ideal winch for you.

Winch Installating on Philippines
Winch Installating on Philippines

AIMIX GROUP CO.,LTD which is subsidiary located in China biggest machinery manufacturer base Henan, is a large professional industry and trade integration enterprise on Cranes, Winches, and Hoists. Only 3 years, we exported for more than 30 countries, our products win good reputation in the world. The management team is by the senior managers of Alibaba and senior experts in crane and winch industry.