Double-drum steel wire rope automatic tensioning mechanism and winch with the same

Abstract

The application discloses a double-drum steel wire rope automatic tensioning mechanism and a winch using the tensioning mechanism. The tensioning mechanism, a traction trolley and a guide wheel are all installed on an adjustable frame. A pulley block is installed on the adjustable frame and the traction trolley respectively. The tensioning mechanism rotates, and the traction trolley moves back and forth on the adjustable frame through the steel wire rope and the pulley block. The double drum is arranged, and is matched with a brake assembly and a transmission assembly, so that the function of automatically tensioning the steel wire rope pulley block of the winch in a non-vertical working state is realized, the traction force is large, the transmission is stable, and the efficiency of loading and unloading is improved.

Description

Technical Field

[0001] This invention relates to the field of winch technology, specifically to a double-drum wire rope automatic tensioning mechanism and a winch equipped with the tensioning mechanism. Background Technology

[0002] In import and export trade, goods are loaded into and out of the country using containers. The wooden crates to be loaded are usually lifted onto the container deck by a forklift, and then pushed inside and stacked by a manual forklift. When the weight of the goods is relatively heavy and the length is relatively long, forklifts and manual forklifts cannot be used for loading and unloading. Special wheel loaders or telescopic boom loaders are required for lifting. However, the boom and hook have a certain height, which means that the top layer of the container must be left empty, and the container cannot be fully loaded with goods, thus wasting space.

[0003] Winches are generally used in construction, bridge building, metallurgy, mining and oil field construction to lift heavy objects. When used for loading and unloading, the wire rope on the winch pushes and pulls the goods in the horizontal direction. Since it is not taut by gravity, it will become loose. Summary of the Invention

[0004] The present invention mainly addresses the problems existing in the prior art by providing a double-drum tensioning mechanism that can solve the problem of loose wire ropes. This tensioning mechanism can be applied to winches, and the wire rope pulley block is automatically tensioned in both directions when it is not in a vertical working state, which can achieve large-tonnage traction without the wire rope becoming loose.

[0005] This invention is achieved through the following techniques:

[0006] An automatic tensioning mechanism for double-drum steel wire rope includes: an outer frame, an upper drum and a lower drum arranged opposite each other on the outer frame; two sets of steel wire ropes are wound on the upper drum and the lower drum in opposite directions.

[0007] The transmission assembly is installed on one side of the upper and lower drums, and the braking assembly is installed on the other side. During operation, the transmission assembly drives the upper and lower drums to rotate in the same direction. One drum is screwed into the wire rope, and the other drum releases the wire rope. At the same time as the wire rope is released, the braking assembly applies a preset braking force, thereby realizing the functions of bidirectional traction and automatic tensioning.

[0008] The transmission assembly includes a driving gear and a driven gear. The driven gear is mounted on the same side of the upper and lower rotating drums. On this side, the upper and lower rotating drums are provided with driven bosses, and the driven gear is provided with a driving boss that matches the driven boss. The upper and lower rotating drums are subjected to mutual traction forces from two sets of steel wire ropes in opposite directions. The driven boss of the upper rotating drum is located to the left of the driving boss and contacts it. The driven boss of the lower rotating drum is located to the right of the driving boss and contacts it. The driving gear meshes with the driven gears of both the upper and lower rotating drums, thereby driving the upper and lower rotating drums to rotate in the same direction simultaneously.

[0009] The braking assembly includes: a pressure adjusting spring, a ratchet friction plate, and a pawl. A ratchet is fixed on the ratchet friction plate and is sleeved on the other side of the shaft of the upper and lower rotating drums through a bearing. It is pressed against the end faces of the upper and lower rotating drums by the pressure adjusting spring and a plane bearing. The pawl is installed in the radial direction of the ratchet and meshes with the ratchet on the ratchet friction plate to constrain the rotation of the ratchet friction plate. By adjusting the pressure of the pressure adjusting spring, the ratchet friction plate is pressed against the end faces of the upper and lower rotating drums. When braking, the ratchet friction plate is stopped by the pawl and brakes and restricts the rotation of the rotating drum. When working in the opposite direction, another set of ratchet friction plates brakes and restricts the rotation of the other rotating drum, so that the two sets of wire ropes in both directions are always working in a taut state.

[0010] When the upper and lower drums rotate counterclockwise, the active boss of the upper drum contacts the passive boss to transmit torque, while the active boss of the lower drum contacts the passive boss but does not transmit torque. When the wire rope is screwed into the upper drum, the pawl of the upper drum slides against the upper ratchet friction plate, and the ratchet friction plate rotates with the upper drum, so the upper drum is not braked by the ratchet friction plate. The wire rope of the lower drum is pulled out by the traction of the wire rope of the upper drum, and the pawl of the lower drum stops the lower ratchet friction plate in the reverse direction. The lower ratchet friction plate brakes the lower drum, restricting its rotation. When the wire rope of the upper drum is subjected to a heavy load, it elongates physically, and the active boss and passive boss of the lower drum gradually separate. The lower drum is braked by the friction of the lower ratchet friction plate, preventing the wire rope wound around it from loosening. The reverse is also true.

[0011] A winch includes a tensioning mechanism, an adjustable frame, a motor, a traction trolley, a pulley block, and guide wheels;

[0012] The adjustable frame has an adjustable height to accommodate containers of different heights for loading and unloading. The front of the adjustable frame is equipped with movable rails, which can be fixed to the container tailgate hole by adjusting the height of the adjustable frame. Guide wheels are installed horizontally at the bottom of the adjustable frame, allowing the adjustable frame to move back and forth along the rails to adjust the loading and unloading position.

[0013] The tensioning mechanism and motor are installed at the upper rear end of the adjustable frame. The motor is connected to the drive gear in the tensioning mechanism, driving the drive gear to rotate. The traction trolley is slidably installed inside the adjustable frame. The pulley blocks are installed at both ends of the traction trolley and both ends of the adjustable frame. The pulley blocks on the adjustable frame correspond to the pulley blocks on the traction trolley. The wire ropes are wound on the upper and lower drums respectively. The wire rope on the upper drum passes through the movable pulley block behind the traction trolley and returns to the fixed pulley block at the rear end of the inner side of the frame, and is finally fixed to the ratchet tensioner at the rear of the frame. The wire rope on the lower drum passes through the fixed pulley block at the front end of the inner side of the frame and returns to the movable pulley block in front of the traction trolley, and is finally fixed to the wire rope fixing wedge at the front end of the frame.

[0014] The motor drives the drive gear to rotate, and the drive gear causes the upper and lower drums to rotate in the same direction through two driven gears. A steel wire rope is screwed into one of the upper and lower drums, and the steel wire rope is released from the other, thereby driving the traction trolley to move back and forth inside the adjustable frame, thus realizing loading and unloading.

[0015] Furthermore, limit switches are installed at both ends of the frame. The limit switches can control the motor to stop running. When the traction trolley touches the limit switch, the motor stops and can only run in the opposite direction.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention provides high traction, smooth transmission, and improved loading and unloading efficiency;

[0018] 2. The double rotating drums provided in this invention, along with the braking and transmission components, enable the winch wire rope pulley block to automatically tighten in a non-vertical working state. Attached Figure Description

[0019] Figure 1 This is a front view of the tensioning mechanism of the present invention.

[0020] Figure 2 This is a top view of the tensioning mechanism of the present invention.

[0021] Figure 3 This is a front view of the winch of the present invention.

[0022] Figure 4 This is a left view of the winch of the present invention.

[0023] Figure 5 This is a top view of the winch of the present invention.

[0024] Meaning of reference numerals in the attached diagram:

[0025] 1. Tensioning mechanism; 101. Outer frame; 102. Upper rotating drum; 103. Lower rotating drum; 104. Steel wire rope; 105. Driving gear; 106. Driven gear; 107. Driven boss; 108. Driving boss; 109. Adjustable spring; 110. Flat bearing; 111. Ratchet friction plate; 112. Pawl; 2. Adjustable frame; 3. Worm gear reducer motor; 4. Traction trolley; 5. Pulley block; 6. Guide wheel; 7. Movable track; 8. Limit switch. Detailed Implementation

[0026] To make the technical solution, objectives and advantages of the present invention clearer, the present invention will be further explained and described below in conjunction with the accompanying drawings and embodiments.

[0027] An automatic tensioning mechanism for double-drum steel wire rope includes: an outer frame 101, an upper drum 102 and a lower drum 103 arranged opposite each other on the outer frame 101; and two sets of steel wire ropes 104 wound on the upper drum 102 and the lower drum 103 in opposite directions.

[0028] The transmission assembly is installed on one side of the upper drum 102 and the lower drum 103. During operation, the transmission assembly drives the upper drum 102 and the lower drum 103 to rotate in the same direction. One drum is screwed into the wire rope 104, and the other drum releases the wire rope 104. At the same time as the wire rope 104 is released, the braking assembly applies a preset braking force, thereby realizing the functions of bidirectional traction and automatic tensioning.

[0029] The transmission assembly includes a drive gear 105 and a driven gear 106. The driven gear 106 is mounted on the same side of the upper drum 102 and the lower drum 103. On this side, the upper drum 102 and the lower drum 103 are provided with driven bosses 107, and the driven gear 106 is provided with a drive boss 108 that matches the driven bosses 107. The upper drum 102 and the lower drum 103 are subjected to mutual traction forces from two sets of steel wire ropes 104 in opposite directions. The driven boss 107 of the upper drum 102 is located to the left of the drive boss 108 and contacts it. The driven boss 107 of the lower drum 103 is located to the right of the drive boss 108 and contacts it. The drive gear 105 meshes with the driven gears 106 of both the upper drum 102 and the lower drum 103, thereby driving the upper drum 102 and the lower drum 103 to rotate in the same direction simultaneously.

[0030] The braking assembly includes: a pressure adjusting spring 109, a ratchet friction plate 111, and a pawl 112. A ratchet is fixed on the ratchet friction plate 111 and is sleeved on the other side of the shaft of the upper rotating drum 102 and the lower rotating drum 103 through a bearing. It is pressed against the end faces of the upper rotating drum 102 and the lower rotating drum 103 by the pressure adjusting spring 109 and the plane bearing 110. The pawl 112 is installed in the radial direction of the ratchet and meshes with the ratchet on the ratchet friction plate 111 to constrain the rotation of the ratchet friction plate 111. By adjusting the pressure of the pressure adjusting spring 109, the ratchet friction plate 111 is pressed against the end faces of the upper rotating drum 102 and the lower rotating drum 103. When braking, the ratchet friction plate 111 is stopped by the pawl 112 and the rotation of the rotating drum is restricted. When working in the opposite direction, another set of ratchet friction plates 111 applies braking to the other rotating drum and restricts its rotation, so that the two sets of steel wire ropes 104 in both directions are always working in a taut state.

[0031] When the upper and lower rotating drums 103 rotate counterclockwise, the active boss 108 of the upper rotating drum 102 contacts the passive boss 107 to transmit torque, while the active boss 108 of the lower rotating drum 103 contacts the passive boss 107 but does not transmit torque. The upper rotating drum 102 is screwed with the wire rope 104, and the pawl 112 of the upper rotating drum 102 slides against the upper ratchet friction plate 111. The ratchet friction plate 111 rotates with the upper rotating drum 102, and the upper rotating drum 102 is not braked by the ratchet friction plate 111. The wire rope 104 of the lower rotating drum 103 is affected by the upper rotating drum. When the wire rope 104 of the upper drum 102 is pulled out, the pawl 112 of the lower drum 103 stops the lower ratchet friction plate 111 in reverse, and the lower ratchet friction plate 111 brakes the lower drum 103, restricting the rotation of the lower drum 103. When the wire rope 104 of the upper drum 102 is subjected to a heavy load, it physically elongates, and the active boss 108 of the lower drum 103 gradually separates from the passive boss. The lower drum 103 is braked by the friction of the lower ratchet friction plate 111, so that the wire rope 104 wound around it cannot loosen; the reverse is also true.

[0032] A winch includes a tensioning mechanism 1, an adjustable frame 2, a worm gear reducer motor 3, a traction trolley 4, a pulley block, and guide wheels 6;

[0033] The height of the adjustable frame 2 can be adjusted to accommodate containers of different heights for loading and unloading. The front end of the adjustable frame 2 is equipped with a movable rail 7. The height of the adjustable frame 2 can be adjusted, and the movable rail 7 can be fixed on the rear door hole of the container. The guide wheel 6 is installed horizontally at the bottom of the adjustable frame 2, so that the adjustable frame 2 can move back and forth along the rail to adjust the loading and unloading position.

[0034] The tensioning mechanism 1 and the worm gear reducer motor 3 are installed at the upper rear end of the adjustable frame 2. The worm gear reducer motor 3 is connected to the drive gear 105 in the tensioning mechanism 1, driving the drive gear 105 to rotate. The traction trolley 4 is slidably installed on the inner side of the adjustable frame 2. The pulley blocks 5 are installed at both ends of the traction trolley 4 and both ends of the adjustable frame 2. The pulley blocks 5 on the adjustable frame 2 correspond to the pulley blocks 5 on the traction trolley 4. The wire rope 104 is wound on the upper drum 102 and the lower drum 103 respectively. The wire rope 104 of the upper drum 102 passes through the traction trolley 4. The pulley block 5 at the rear loops back to the pulley block 5 at the inner rear end of the adjustable frame 2, and is finally fixed to the ratchet tensioner set at the rear of the adjustable frame 2. The ratchet tensioner is manually adjusted to ensure that the wire rope 104 is taut in the original state. When the wire rope is stretched due to metal fatigue after long-term operation, the ratchet tensioner can be adjusted appropriately to tighten the front and rear wire ropes and restore the original state. The wire rope 104 of the lower drum 103 loops back to the pulley block 5 at the inner front end of the adjustable frame 2, and is finally fixed to the wire rope fixing wedge located at the front end of the adjustable frame 2.

[0035] The worm gear reducer motor 3 drives the drive gear 105 to rotate. The drive gear 105 causes the upper drum 102 and the lower drum 103 to rotate in the same direction through two driven gears 106. One of the upper drum 102 and the lower drum 103 is screwed into the wire rope 104, and the other is released from the wire rope 104, thereby driving the traction trolley 4 to reciprocate inside the adjustable frame 2, thus realizing loading and unloading.

[0036] Furthermore, limit switches 8 are provided at both ends of the adjustable frame 2. The limit switches 8 can control the worm gear reducer motor 3 to stop running. When the traction trolley 4 touches the limit switch 8, the worm gear reducer motor 3 stops and can only run in the opposite direction.

[0037] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the content of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A double-drum wire rope automatic tensioning mechanism, characterized in that: include: The outer frame includes an upper drum and a lower drum mounted on the outer frame for winding the wire rope, a transmission assembly on one side of the upper drum and the lower drum, and a braking assembly on the other side. The transmission assembly drives the upper drum and the lower drum to rotate and wind or release the wire rope, and the braking assembly automatically brakes the upper drum and the lower drum. The transmission assembly includes a driving gear and a driven gear. The driven gear is installed on one side of the upper rotating drum and the lower rotating drum respectively. The driving gear meshes with the driven gears of the upper rotating drum and the lower rotating drum at the same time, thereby driving the upper rotating drum and the lower rotating drum to rotate in the same direction. The braking assembly includes a pressure adjusting spring, a plane bearing, a pawl, and a ratchet friction plate. The ratchet friction plate is installed on one side of the upper and lower rotating cylinders. The pressure adjusting spring is installed between the plane bearing and the ratchet friction plate, pressing the ratchet friction plate against the end faces of the upper and lower rotating cylinders to perform braking. The pawl engages with the ratchet on the ratchet friction plate. A passive boss is provided on one side of the upper and lower rotating cylinders where the passive gear is installed, and an active boss that matches the passive boss is provided on the passive gear. When the upper and lower drums rotate counterclockwise, the active boss of the upper drum contacts the passive boss to transmit torque, while the active boss of the lower drum contacts the passive boss but does not transmit torque. The upper drum is screwed with a wire rope, and the pawl of the upper drum slides against the upper ratchet friction plate. The ratchet friction plate rotates with the upper drum, and the upper drum is not braked by the ratchet friction plate. The wire rope of the lower drum is pulled out by the traction of the wire rope of the upper drum. The pawl of the lower drum stops the lower ratchet friction plate, and the lower ratchet friction plate brakes the lower drum, restricting its rotation. When the wire rope of the upper drum is subjected to a heavy load, it elongates physically. The active boss and passive boss of the lower drum gradually separate, and the lower drum is braked by the friction of the lower ratchet friction plate, preventing the wire rope wound around it from loosening.

2. A winch, characterized in that: The system includes the automatic tensioning mechanism for double-drum wire rope as described in claim 1; it also includes: an adjustable frame, a traction trolley, a pulley block, and a guide wheel; the tensioning mechanism, the traction trolley, and the guide wheel are all mounted on the adjustable frame; the pulley block is respectively mounted on the adjustable frame and the traction trolley; the tensioning mechanism rotates, and the traction trolley moves back and forth on the adjustable frame through the wire rope and the pulley block.

3. The winch as described in claim 2, characterized in that: The adjustable frame is equipped with a movable rail at its front end, allowing the adjustable frame to move back and forth along the movable rail.

4. The winch as described in claim 2, characterized in that: The frame is equipped with a limit switch, which controls the motor to stop running.

Images