Overspeed automatic brake system for mine endless rope winch

Abstract

The present invention relates to an overspeed automatic brake system for a mine-used endless rope winch. Existing mine car brakes are prone to mis-braking or brake failure. To this end, the overspeed automatic brake system for the mine-used endless rope winch includes a brake mechanism and a bidirectional centrifugal overspeed clutch brake trigger device, the bidirectional centrifugal overspeed clutch brake trigger device includes a large sprocket, a chain, a rotating shaft, a static disc and a dynamic disc, and a pulley disc is hinged in the middle of the frame of the winch, and a horizontal support rod is fixedly connected to the center of the pulley disc, and the two sides of the horizontal support rod respectively support the claws. Rope grooves are provided on the outer circumferences of the static disc and the pulley disc, and a steel wire rope and a fixed pulley are provided between the static disc and the pulley disc. The pulley disc is equipped with a torsion spring or a reset spring, and the central extension line of the steel wire rope connected to the outer edge of the static disc just passes through a point on the axis line of the static disc. The present invention is suitable for ordinary rail transportation in coal mines, has high braking safety, is simple to use, and has high reliability, and can be used on a large scale in coal mines.

Description

Technical Field

[0001] The invention relates to an overspeed automatic braking system for a mining endless rope winch. Background Art

[0002] In the prior art, the most common braking method for mining endless rope winches is claw braking, which is a claw brake block made of cast iron or other materials. When the wire rope breaks, the brake block presses against the transport track sleepers, and the winch stops running through rigid resistance; another relatively new braking method is caliper-type hydraulic rail-holding brake, which is based on a combined symmetrical brake caliper structure design. Through a hydraulic device, the brake caliper is controlled to hold the rail, and the friction between the brake caliper and the rail generates braking force to stop the vehicle from moving forward.

[0003] The above two braking methods have their own advantages and disadvantages due to their different design principles: the claw braking method is simple and reliable, but the triggering method is defective and misoperation often occurs, that is, the brake should be triggered, but it is not triggered, and the braking effect is lost; the hydraulic rail-holding braking method improves the triggering method and generally does not cause misoperation, but the rail-holding braking method often fails to stop the vehicle under large tonnage and high-speed conditions, resulting in brake failure. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to overcome the above-mentioned defects of the prior art and provide an overspeed automatic braking system for a mining endless rope winch.

[0005] In order to solve the above technical problems, the overspeed automatic braking system of the mine endless rope winch includes a braking mechanism, which includes two claws. The two claws are located between the two axles under the matching winch car, and the outer ends of the two claws are respectively hinged on the frame of the matching winch. It is characterized in that: it includes a bidirectional centrifugal overspeed clutch brake trigger device, and the bidirectional centrifugal overspeed clutch brake trigger device includes a large sprocket, a chain, a rotating shaft, a static plate, a dynamic plate and a shell. The large sprocket is fixed to the inner side of a wheel of the matching winch, and the axis center line of the large sprocket coincides with the axis center line of the corresponding wheel. The shell is fixed on the frame of the matching winch, and the rotating shaft is fixed to the center of the shell through two bearings, and the small sprocket, static plate and dynamic plate are sleeved on the rotating shaft. On the upper part, the small sprocket and the rotating shaft are respectively provided with relative keyways, and keys are arranged in the keyways to achieve fixation. The moving plate is connected to the rotating shaft by a sliding key. The moving plate can rotate with the rotating shaft and can slide axially on the rotating shaft. The static plate is fixed on the rotating shaft by a thrust bearing and cannot slide axially, but can rotate around the rotating shaft. A spiral spring and a thrust bearing are also sleeved on the rotating shaft between the static plate and the moving plate. Relative friction contact rings are also respectively arranged on the inner sides of the static plate and the moving plate. When the equipped winch exceeds the design vehicle speed, the rotating speed of the moving plate exceeds the corresponding rotating speed, and the centrifugal force of the friction contact ring on the moving plate generates a component force sufficient to overcome the elastic force of the spiral spring. The friction contact rings of the static plate and the moving plate are engaged with each other, and the moving plate drives the static plate to rotate.

[0006] A pulley disc is hinged in the middle of the frame equipped with the winch, and a vertical shaft is fixedly connected to the center of the pulley disc. The lower end of the vertical shaft is connected to the middle of a horizontal supporting rod, and the two sides of the horizontal supporting rod respectively support the clamping claws.

[0007] Rope grooves are provided on the outer circumferences of the static plate and the pulley plate, and a steel wire rope and a fixed pulley are provided between the static plate and the pulley plate. One end of the steel wire rope is fixedly connected to a point on the outer edge of the static plate, and the other end is fixed to the outer edge of the pulley plate after crossing part of the rope grooves of the fixed pulley and the pulley plate. The pulley plate is equipped with a torsion spring or a return spring, which tightens the steel wire rope and makes the center extension line of the steel wire rope connected to the outer edge of the static plate pass through a point on the axis line of the static plate.

[0008] During use, when the wire rope of the endless rope winch breaks, the winch pulled by the wire rope slips on the slope. When the speed reaches the allowable speed limit, after the static disc and the dynamic disc are combined, the static disc can wrap the wire rope in its rope groove regardless of whether it rotates forward or reverse, pulling the wire rope, driving the pulley plate and the horizontal support rod to deflect, releasing the claw, which falls under the action of gravity and is inserted into the ground between the tracks or between the sleepers, thereby achieving the purpose of timely braking.

[0009] With this design, the bidirectional centrifugal overspeed clutch brake trigger device has a purely mechanical structure, does not require electronic components, does not require power supply, has high reliability, is not afraid of interference, and can basically achieve maintenance-free operation. It has very obvious advantages in the harsh environment of underground coal mines and is worthy of large-scale promotion and application in coal mines.

[0010] The main components are made of stainless steel, which is wear-resistant, corrosion-resistant, has strong impact resistance, and is not easy to deform. It is suitable for harsh transportation environments with ups and downs.

[0011] As an optimization, sleeves are respectively provided on the horizontal support rods on both sides of the vertical axis. The sleeves are fixed on the horizontal support rods through bearings and can rotate around the horizontal support rods. The horizontal support rods support the claws through the sleeves. With this design, the resistance of the horizontal support rods is small when they rotate, and the triggering is more sensitive.

[0012] The overspeed automatic brake system of the mine-used endless rope winch of the present invention is suitable for common rail transportation in coal mines, has high braking safety, is easy to use, has high reliability, and can be used on a large scale in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The overspeed automatic brake system of the mining endless rope winch of the present invention is further described below in conjunction with the accompanying drawings:

[0014] Figure 1 It is a partial cross-sectional structural diagram of a winch equipped with an overspeed automatic brake system for a mine-used endless rope winch (part of the winch is cut away along a longitudinal plane passing through the pulley disc and its vertical axis);

[0015] Figure 2 The diagram is a top view of a partial cross-sectional structure of a winch equipped with an overspeed automatic brake system for an infinite rope winch for use in a mine (cutting along the curve in the figure, removing part of the carriage floor and the rope storage wheel to expose the necessary internal structure).

[0016] In the figure: 1 is a claw, 2 is an axle, 3 is a large sprocket, 4 is a small sprocket, 5 is a chain, 6 is a rotating shaft, 7 is a static plate, 8 is a dynamic plate, 9 is a housing, 10 is a wheel, 11 is a frame equipped with a winch, 12 is a sliding key, 13 is a thrust bearing, 14 is a spiral spring, 15 is a friction contact ring, 16 is a pulley plate, 17 is a vertical shaft, 18 is a horizontal support rod, 19 is a rope groove, 20 is a wire rope, 21 is a fixed pulley, 22 is a sleeve, and 23 is a rope storage wheel. DETAILED DESCRIPTION

[0017] Implementation method 1: Figure 1 As shown, the overspeed automatic braking system of the mining endless rope winch includes a braking mechanism, which includes two claws 1. The two claws 1 are located between two axles 2 under the accompanying winch car, and the outer ends of the two claws 1 are respectively hinged on the frame 11 of the accompanying winch.

[0018] The invention is characterized in that: it comprises a bidirectional centrifugal overspeed clutch brake trigger device, which comprises a large sprocket 3, a small sprocket 4, a chain 5, a rotating shaft 6, a static disc 7, a dynamic disc 8 and a shell 9. The large sprocket 3 is fixed on the inner side of a wheel 10 of a matching winch, and the axis center line of the large sprocket 3 coincides with the axis center line of the corresponding wheel 10. The shell 9 is fixed on the frame 11 of the matching winch. The rotating shaft 6 is fixed to the center of the shell 9 through two bearings. The small sprocket 4, the static disc 7 and the dynamic disc 8 are sleeved on the rotating shaft 6. The small sprocket 4 and the rotating shaft 6 are respectively provided with relative keyways, and keys are provided in the keyways to achieve fixation. The dynamic disc 8 is connected to the rotating shaft 6 through a sliding key 12. The dynamic disc 8 can rotate with the rotating shaft 6 and can slide axially on the rotating shaft 6. The static disc 7 is fixed to the rotating shaft 6 through a thrust bearing 13 and cannot slide axially, but can rotate around the rotating shaft 6.

[0019] A coil spring 14 and a thrust bearing 13 are also sleeved on the rotating shaft 6 between the static plate 7 and the dynamic plate 8. Relative friction contact rings 15 are respectively provided on the inner sides of the static plate 7 and the dynamic plate 8. When the speed of the equipped winch exceeds the design speed, the rotation speed of the dynamic plate 8 exceeds the corresponding rotation speed, and the centrifugal force of the friction contact ring 15 on the dynamic plate 8 generates a component force sufficient to overcome the elastic force of the coil spring 14. The friction contact rings 15 of the static plate 7 and the dynamic plate 8 are engaged with each other, and the dynamic plate 8 drives the static plate 7 to rotate.

[0020] like Figure 2 As shown, a pulley plate 16 is hingedly connected in the middle of the frame 11 equipped with the winch, and a vertical shaft 17 is fixedly connected to the center of the pulley plate 16. The lower end of the vertical shaft 17 is connected to the middle of a horizontal support rod 18, and the two sides of the horizontal support rod 18 respectively support the clamping claw 1.

[0021] Rope grooves 19 are provided on the outer circumferences of the static disk 7 and the pulley disk 16, and a steel wire rope 20 and a fixed pulley 21 are provided between the static disk 7 and the pulley disk 16. One end of the steel wire rope 20 is fixedly connected to a point on the outer edge of the static disk 7, and the other end is fixed to the outer edge of the pulley disk 16 after crossing the fixed pulley 21 and part of the rope grooves 19 of the pulley disk 16. The pulley disk 16 is equipped with a torsion spring or a return spring, which tightens the steel wire rope 20 and makes the center extension line of the steel wire rope connected to the outer edge of the static disk pass through a point on the axis line of the static disk.

[0022] like Figure 1 As shown, the horizontal support rods 18 on both sides of the vertical axis 17 are respectively sleeved with sleeves 22, and the sleeves 22 are fixed to the horizontal support rods 18 through bearings and can rotate around the horizontal support rods 18. The horizontal support rods 18 are supported on the claws 1 through the sleeves 22.

Claims

1. An overspeed automatic brake system for a mine-used endless rope winch, comprising a brake mechanism, wherein the brake mechanism comprises two claws, the two claws are located between two axles below the accompanying winch carriage, and the outer ends of the two claws are respectively hinged on the frame of the accompanying winch, characterized in that: The invention comprises a bidirectional centrifugal overspeed clutch brake trigger device, which comprises a large sprocket, a small sprocket, a chain, a rotating shaft, a static plate, a dynamic plate and a housing. The large sprocket is fixed on the inner side of a wheel of a matching winch, and the axis center line of the large sprocket coincides with the axis center line of the corresponding wheel. The housing is fixed on the frame of the matching winch. The rotating shaft is fixed to the center of the housing through two bearings. The small sprocket, the static plate and the dynamic plate are sleeved on the rotating shaft. The small sprocket and the rotating shaft are respectively provided with relative keyways, and keys are arranged in the keyways to achieve fixation. The dynamic plate and the rotating shaft are connected by sliding keys. The movable plate can rotate with the rotating shaft and can slide axially on the rotating shaft. The static plate is fixed on the rotating shaft through a thrust bearing and cannot slide axially, but can rotate around the rotating shaft. A spiral spring and a thrust bearing are also sleeved on the rotating shaft between the static plate and the movable plate. Relative friction contact rings are also provided on the inner sides of the static plate and the movable plate. When the winch exceeds the design speed, the rotating speed of the movable plate exceeds the corresponding speed. The centrifugal force of the friction contact ring on the movable plate generates a component force sufficient to overcome the elastic force of the spiral spring. The friction contact rings of the static plate and the movable plate are engaged with each other, and the movable plate drives the static plate to rotate. A pulley plate is hinged in the middle of the frame equipped with the winch, and a vertical shaft is fixedly connected to the center of the pulley plate. The lower end of the vertical shaft is connected to the middle of a horizontal support rod, and the two sides of the horizontal support rod respectively support the clamping claws. Rope grooves are provided on the outer circumferences of the static plate and the pulley plate, and a steel wire rope and a fixed pulley are provided between the static plate and the pulley plate. One end of the steel wire rope is fixedly connected to a point on the outer edge of the static plate, and the other end is fixed to the outer edge of the pulley plate after crossing part of the rope grooves of the fixed pulley and the pulley plate. The pulley plate is equipped with a torsion spring or a return spring, which tightens the steel wire rope and makes the center extension line of the steel wire rope connected to the outer edge of the static plate pass through a point on the axis line of the static plate.

2. The overspeed automatic braking system of the mining endless rope winch according to claim 1 is characterized by: The horizontal support rods on both sides of the vertical axis are respectively sleeved with sleeves, which are fixed on the horizontal support rods through bearings and can rotate around the horizontal support rods. The horizontal support rods support the claws through the sleeves.

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