Rope traction device with constant and controllable tension

Abstract

The invention discloses a rope traction device with constant and controllable tension, and belongs to the technical field of rope traction equipment.The device comprises a base formed by a first base and a second base which are fixedly connected, the first base is connected with a driving mechanism, and a guide groove is formed in the first base; a thrust bearing fixing part and a bearing seat in the driving mechanism slide on the first base along the guide groove, the driving mechanism is in friction transmission with a locking mechanism on the right side of the driving mechanism, and the locking mechanism is fixedly connected with the base. According to the rope traction device with the constant and controllable pulling force, constant force input is achieved from the mechanism design level, it is ensured that the traction force of the rope is kept stable and constant in the rope winding process, and therefore the reliability and safety of the rope traction device are remarkably improved; in the rope releasing process, only when the traction force on the rope reaches the preset value, the rope can be released, and therefore the situation that the rope is pulled out accidentally due to the fact that the rope bears complex external force is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of rope pulling equipment, and in particular to a rope pulling device with constant and controllable pulling force. Background Art

[0002] At present, various rope structures such as cables and steel wires are increasingly used, and the corresponding rope traction devices have also been greatly developed. However, in some application scenarios, the rope may be relatively fragile or the working conditions are special, which places certain requirements on the traction force of the rope during the rope collection process. In order to prevent the rope from breaking or other adverse consequences due to excessive tension generated by the rope traction device, especially in the process of retrieving certain metal wires, it is necessary to ensure that the traction force is constant.

[0003] Most existing technologies rely on sensors to monitor the traction on the rope and make passive adjustments accordingly. This method has a certain response delay and does not achieve constant control of traction at the mechanical design level. Once the sensor fails or is damaged, the entire device will fail, thereby reducing the safety of the device. In addition, most traction devices stop working after the rope is collected, and no additional safety protection measures are set. This means that the rope may be pulled out again under the action of unexpected external forces, posing a major safety hazard. Summary of the invention

[0004] The purpose of the present invention is to provide a rope traction device with constant and controllable tension, to achieve constant force input from the mechanism design level, to ensure that the traction force of the rope remains stable and constant during the rope collection process, thereby significantly improving the reliability and safety of the rope traction device; during the rope release process, the rope can only be released when the traction force on the rope reaches a preset value, thereby preventing the rope from being accidentally pulled out due to complex external forces.

[0005] To achieve the above-mentioned purpose, the present invention provides a rope traction device with constant and controllable tension, wherein the base includes a first base and a second base fixedly connected, the first base is connected to a driving mechanism, a guide groove is provided on the first base, the thrust bearing fixing member and the bearing seat in the driving mechanism can slide on the first base along the guide groove, the driving mechanism and the locking mechanism on its right side are transmitted by friction, and the locking mechanism is fixedly connected to the base.

[0006] Preferably, one end of the left side of the thrust bearing fixing piece is fixedly connected to the support block, and the other end thereof is fixedly connected to the motor, and the output shaft of the motor is fixedly connected to the driving gear.

[0007] Preferably, a thrust bearing is fixedly provided on the top right side of the thrust bearing fixing member, and a bearing seat cover, a convex spur gear and a first fixed plate are sequentially provided on the right side of the thrust bearing. The bearing seat cover is bolted to the bearing seat at its bottom, one end of the power input shaft is rotatably connected to the thrust bearing, and the other end thereof passes through the bearing seat cover, the bearing seat, and the convex spur gear in sequence and is fixedly connected to the first fixed plate. The power input shaft is rotatably connected to the bearing seat cover and the bearing seat, and is fixedly connected to the convex spur gear, and the drive gear is meshed with the convex spur gear.

[0008] Preferably, a friction disc base is provided on the right side of the first fixed disc, and a long rod and a countersunk bolt are provided on the friction disc base, the long rod passes through the first fixed disc, the head of the countersunk bolt is inserted into the friction disc base, and the tail of the countersunk bolt passes through the compression spring, the first fixed disc and the nut in sequence, and the friction disc base is fixedly connected to the driving end friction disc on its right side.

[0009] Preferably, the locking end friction disk of the locking mechanism is engaged with the driving end friction disk, the locking end friction disk is fixedly connected to the second fixed disk on its right side, and the second fixed disk is fixedly connected to the rope winding shaft on its right side.

[0010] Preferably, the locking mechanism also includes a left friction disc housing and a right friction disc housing connected by bolts, the left friction disc housing is fixedly connected to a bearing inside it, and the right friction disc housing is fixedly connected to a thrust bearing inside it, a one-way bearing is provided between the bearing and the thrust bearing, and a friction wheel is provided on the outer side of the one-way bearing.

[0011] Preferably, the rope winding shaft passes through the bearing, the one-way bearing, the thrust bearing and the turntable in sequence, and the rope is wound around the turntable.

[0012] Preferably, the friction disc housing is fixedly provided with insertion rods at the four corners, the insertion rods are inserted into the friction block, the friction block is rotatably connected to the friction wheel, the friction block is fixedly connected to the thrust spring, the thrust spring is fixedly connected to the spring baffle, and the spring baffle is fixedly connected to the locking bolt passing through the left side of the friction disc housing.

[0013] Preferably, a limiting block is provided on the second base, and the left friction disc housing and the right friction disc housing are fixedly connected to the base via bolts and the limiting block.

[0014] Preferably, the thrust bearing fixing member and the bearing seat are both connected to the first base by bolts.

[0015] Therefore, the present invention adopts the above-mentioned rope traction device with constant and controllable tension, which has the following beneficial effects: (1) The present invention realizes the constant force input of the rope traction force from the mechanism design level, ensuring that the traction force of the rope is kept constant during the rope collection process, thereby preventing the rope from breaking due to excessive traction during the rope collection process; (2) The present invention can impose conditional constraints on the rope release stage. The rope can be released smoothly only when the traction force of the rope exceeds the set value, and the rope release is stopped immediately when the traction force of the rope is less than the set value, thereby ensuring safety; (3) The present invention can set the traction force required for the rope in the rope collection stage and the locking force required for the rope release stage, respectively, and the two are independent of each other and do not interfere with each other. If the tension at the free end of the rope is constant, by setting the preset value of the traction force in the rope collection stage to be greater than the preset value of the locking force in the rope release stage, it is possible to smoothly release the rope after the rope is collected with a constant traction force; by setting the preset value of the traction force in the rope collection stage to be less than the preset value of the locking force in the rope release stage, it is possible to lock the rope after the rope is collected with a constant traction force.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a rope traction device with constant and controllable tension according to the present invention; Figure 2 It is a schematic diagram of a driving mechanism of an embodiment of a rope traction device with constant and controllable tension according to the present invention; Figure 3 It is a schematic diagram of a locking mechanism of an embodiment of a rope pulling device with constant and controllable tension in the present invention; Figure 4 The figure is a schematic diagram of the internal structure of a locking mechanism of an embodiment of a rope traction device with constant and controllable tension in the present invention.

[0018] Reference numerals 1. Driving mechanism; 101. Thrust bearing fixing member; 102. Support block; 103. Motor; 104. Driving gear; 105. First thrust bearing; 106. Power input shaft; 107. Bearing seat upper cover; 108. Bearing seat; 109. Convex spur gear; 110. First fixing plate; 111. Countersunk bolt; 112. Long bar; 113. Nut; 114. Compression spring; 115. Friction plate base; 116. Friction plate at driving end; 2. Locking mechanism; 201. Locking End friction disc; 202, second fixed disc; 203, friction disc housing left; 204, friction disc housing right; 205, bearing; 206, second thrust bearing; 207, friction wheel; 208, one-way bearing; 209, rope winding shaft; 210, locking bolt; 211, spring baffle; 212, thrust spring; 213, plug rod; 214, friction block; 3, base; 301, first base; 302, second base; 303, guide groove; 4, turntable; 5, rope; 6, limit block. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] Embodiment 1 like Figure 1 to Figure 2As shown, the present invention provides a rope traction device with constant and controllable tension, wherein the base 3 includes a first base 301 and a second base 302 that are fixedly connected, the first base 301 is connected to the driving mechanism 1, and a guide groove 303 is provided on the first base 301. The thrust bearing fixing member 101 and the bearing seat 108 in the driving mechanism 1 can slide on the first base 301 along the guide groove 303. When the thrust bearing fixing member 101 and the bearing seat 108 are located in different positions, the force generated by the driving mechanism 1 will also change accordingly. Since the driving mechanism 1 and the locking mechanism 2 on its right side are transmitted by friction, the force transmitted by the driving mechanism 1 to the locking mechanism 2 is also different, thereby changing the traction force generated on the rope 5. The locking mechanism 2 is responsible for locking the rope 5 when the preset traction force is not reached, and provides safety protection after the rope is collected to prevent the rope 5 from being pulled out due to unexpected external force. The locking mechanism 2 is fixedly connected to the base 3 to ensure the stability and reliability of the entire system.

[0022] like Figure 3 As shown, the thrust bearing fixing member 101 is bolted to the first base 301 and one end of its left side is fixedly connected to the support block 102, ensuring that the thrust bearing fixing member 101 remains stable during movement; the other end is fixedly connected to the motor 103, and the output shaft of the motor 103 is fixedly connected to the driving gear 104, thereby transmitting the rotational motion to the driving gear 104.

[0023] A first thrust bearing 105 is fixedly arranged on the top of the right side of the thrust bearing fixing member 101. The first thrust bearing 105 is used to support and transmit thrust, reduce friction, and ensure smooth movement. A bearing seat cover 107, a convex spur gear 109, and a first fixed plate 110 are arranged in sequence on the right side of the first thrust bearing 105. One end of the power input shaft 106 is rotatably connected to the first thrust bearing 105, and the other end thereof passes through the bearing seat cover 107, the bearing seat 108, and the convex spur gear 109 in sequence and is fixedly connected to the first fixed plate 110. The bearing seat cover 107 is bolted to the bearing seat 108 at its bottom, the bearing seat 108 is bolted to the first base 301, and the power input shaft 106 is rotatably connected to the bearing seat cover 107 and the bearing seat 108. This design can not only provide stable support for the power input shaft 106, but also prevent the bearing seat 108 and the bearing seat cover 107 from relative displacement on the first base 301. Since the driving gear 104 is meshed with the convex spur gear 109, when the motor 103 is started, the driving gear 104 rotates to drive the convex spur gear 109 to rotate together. Since the power input shaft 106 is fixedly connected to the convex spur gear 109 and the first fixed plate 110, the rotation of the convex spur gear 109 is directly transmitted to the power input shaft 106, causing it to rotate accordingly, and finally driving the first fixed plate 110 to rotate.

[0024] A friction disc base 115 is provided on the right side of the first fixed disc 110, and a long rod 112 and a countersunk bolt 111 are provided on the friction disc base 115. The long rod 112 passes through the first fixed disc 110 to ensure that the first fixed disc 110 and the friction disc base 115 can rotate synchronously; the head of the countersunk bolt 111 is inserted into the friction disc base 115, and the tail of the countersunk bolt 111 passes through the compression spring 114, the first fixed disc 110 and the nut 113 in sequence, thereby limiting the axial movement between the friction disc base 115 and the power input shaft 106; the friction disc base 115 is fixedly connected to the driving end friction disc 116 on its right side to ensure that the driving end friction disc 116 can rotate synchronously with the friction disc base 115.

[0025] like Figure 4 As shown, the locking end friction disc 201 of the locking mechanism 2 and the driving end friction disc 116 are driven by friction, ensuring that the locking mechanism 2 can receive the traction force transmitted by the driving mechanism 1, and ensuring that the locking end friction disc 201 and the driving end friction disc 116 rotate synchronously. The locking end friction disc 201 is fixedly connected to the second fixed disc 202 on its right side, and the second fixed disc 202 is fixedly connected to the rope winding shaft 209 on its right side to form an integral structure. Therefore, the rotation of the locking end friction disc 201 will directly drive the rope winding shaft 209 to rotate.

[0026] The locking mechanism 2 also includes a left friction disc housing 203 and a right friction disc housing 204 connected by bolts. A limit block 6 is provided on the second base 302. The left friction disc housing 203 and the right friction disc housing 204 are fixed to the base 3 by bolts and the limit block 6.

[0027] The left friction disc housing 203 is fixedly connected to the bearing 205 inside it, the right friction disc housing 204 is fixedly connected to the second thrust bearing 206 inside it, a one-way bearing 208 is arranged between the bearing 205 and the second thrust bearing 206, and a friction wheel 207 is sleeved on the outer side of the one-way bearing 208. The rope winding shaft 209 passes through the bearing 205, the one-way bearing 208, the second thrust bearing 206 and the rotating disk 4 in sequence, and is assembled with the left friction disc housing 203, the friction wheel 207, the right friction disc housing 204 and the rotating disk 4. The left friction disc housing 203 and the right friction disc housing 204 can provide support and allow the rope winding shaft 209 to rotate; the one-way bearing 208 ensures that the rope winding shaft 209 can only rotate freely in one direction, and must rotate with the friction wheel 207 in the other direction; the friction wheel 207 can rotate synchronously with the rope winding shaft 209 to increase the friction force to prevent the rope 5 from being accidentally released due to external force; the rope 5 is wound around the turntable 4 and rotates with the rope winding shaft 209 to achieve control over the retraction and tensioning of the rope 5.

[0028] The left friction disc housing 203 is fixedly provided with insertion rods 213 at the four corners, and the insertion rods 213 are inserted into the friction block 214 to fix and position the friction block 214; the friction block 214 is rotatably connected to the friction wheel 207, so that the friction block 214 can transmit power and the friction wheel 207 can rotate freely; the friction block 214 is fixedly connected to the thrust spring 212, and the thrust spring 212 provides a locking force to ensure that there is sufficient friction between the friction block 214 and the friction wheel 207; the thrust spring 212 is fixedly connected to the spring baffle 211 to ensure that the spring can stably apply the locking force; the spring baffle 211 is fixedly connected to the locking bolt 210 passing through the left friction disc housing 203 to ensure that the entire structure is stable in a suitable position on the left friction disc housing 203.

[0029] Working principle: During the rope collection stage, after the operator starts the motor 103, the output shaft of the motor 103 drives the driving gear 104 to rotate, directly driving the convex spur gear 109 to rotate, thereby driving the power input shaft 106, the first fixed disk 110, the friction disk base 115 and the driving end friction disk 116 to rotate synchronously, and transferring the power from the driving mechanism 1 to the locking mechanism 2 through the driving end friction disk 116. When the driving force generated by the motor 103 is greater than the maximum friction force that can be generated under the pressure generated by the compression spring 114 on the driving end friction disk 116, the driving end friction disk 116 will slip and cannot transmit a larger driving force, thereby achieving a constant force input at the driving end.

[0030] Except for the friction disc base 115, the driving end friction disc 116, the countersunk bolt 111 and the nut 113, other devices in the driving mechanism 1 cannot produce relative displacement in the axial direction, so they can move axially as a whole along the guide groove 303 on the first base 301 at the same time, thereby changing the compression amount of the compression spring 114, and then changing the driving force that the driving end friction disc 116 can transmit to the locking mechanism 2. By synchronously assembling the thrust bearing fixing member 101 and the bearing seat 108 at different positions on the guide groove 303, the requirements of different traction forces when collecting different ropes 5 can be met.

[0031] The locking end friction disc 201 of the locking mechanism 2 receives the traction force transmitted by the driving mechanism 1 and transmits it to the rope winding shaft 209, so that the rope winding shaft 209 keeps synchronous rotation with the driving system. During the process of rope winding shaft 209 collecting the rope, the rope winding shaft 209 rotates freely, and the friction wheel 207 does not rotate under the action of the one-way bearing 208, thus completing the rope collecting process.

[0032] During the rope release phase, the compression amount of the thrust spring 212 can be changed by rotating the locking bolt 210 by different numbers of turns, thereby changing the friction force that needs to be overcome when the friction wheel 207 and the friction block 214 rotate relative to each other, and finally setting the expected value of the traction force that needs to be satisfied when the rope 5 is released. However, when the traction force on the rope 5 is less than the expected value under the action of the friction block 214, the rope 5 cannot be released; only when the traction force is greater than or equal to the expected value can the rope 5 be released smoothly, thereby ensuring that the rope 5 will not be accidentally released due to external force.

[0033] Therefore, the present invention adopts the above-mentioned rope traction device with constant and controllable tension to achieve constant force input from the mechanism design level, ensuring that the traction force of the rope remains stable and constant during the rope collection process, thereby significantly improving the reliability and safety of the rope traction device; during the rope release process, the rope can only be released when the traction force on the rope reaches a preset value, thereby preventing the rope from being accidentally pulled out due to complex external forces.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A rope traction device with constant and controllable tension, characterized in that: The base includes a first base and a second base fixedly connected, the first base is connected to the driving mechanism, a guide groove is provided on the first base, the thrust bearing fixing member and the bearing seat in the driving mechanism slide on the first base along the guide groove, the driving mechanism and the locking mechanism on its right side are transmitted by friction, and the locking mechanism is fixedly connected to the base.

2. A rope traction device with constant and controllable tension according to claim 1, characterized in that: One end of the left side of the thrust bearing fixing piece is fixedly connected to the support block, and the other end thereof is fixedly connected to the motor, and the output shaft of the motor is fixedly connected to the driving gear.

3. A rope pulling device with constant and controllable tension according to claim 2, characterized in that: A thrust bearing is fixedly provided on the top right side of the thrust bearing fixing member, and a bearing seat cover, a convex spur gear and a first fixed plate are sequentially provided on the right side of the thrust bearing. The bearing seat cover is bolted to the bearing seat at its bottom, one end of the power input shaft is rotatably connected to the thrust bearing, and the other end thereof passes through the bearing seat cover, the bearing seat, and the convex spur gear in sequence and is fixedly connected to the first fixed plate. The power input shaft is rotatably connected to the bearing seat cover and the bearing seat, and is fixedly connected to the convex spur gear, and the driving gear is meshed with the convex spur gear.

4. A rope traction device with constant and controllable tension according to claim 3, characterized in that: A friction disc base is provided on the right side of the first fixed disc, and a long rod and a countersunk bolt are provided on the friction disc base. The long rod passes through the first fixed disc, and the head of the countersunk bolt is inserted into the friction disc base. The tail of the countersunk bolt passes through the compression spring, the first fixed disc and the nut in sequence. The friction disc base is fixedly connected to the driving end friction disc on its right side.

5. A rope traction device with constant and controllable tension according to claim 1, characterized in that: The locking end friction disk of the locking mechanism and the driving end friction disk are frictionally transmitted, the locking end friction disk is fixedly connected to the second fixed disk on its right side, and the second fixed disk is fixedly connected to the rope winding shaft on its right side.

6. A rope pulling device with constant and controllable tension according to claim 5, characterized in that: The locking mechanism also includes a left friction disc housing and a right friction disc housing connected by bolts. The left friction disc housing is fixedly connected to a bearing inside the housing, and the right friction disc housing is fixedly connected to a thrust bearing inside the housing. A one-way bearing is provided between the bearing and the thrust bearing, and a friction wheel is provided on the outer side of the one-way bearing.

7. A rope pulling device with constant and controllable tension according to claim 6, characterized in that: The rope winding shaft passes through the bearing, the one-way bearing, the thrust bearing and the turntable in sequence, and a rope is wound around the turntable.

8. A rope pulling device with constant and controllable tension according to claim 7, characterized in that: The left side of the friction disc housing is fixed with plug rods at the four corners, the plug rods are inserted into the friction block, the friction block is rotatably connected to the friction wheel, the friction block is fixedly connected to the thrust spring, the thrust spring is fixedly connected to the spring baffle, and the spring baffle is fixedly connected to the locking bolt passing through the left side of the friction disc housing.

9. A rope pulling device with constant and controllable tension according to claim 6, characterized in that: The second base is provided with a limit block, and the left friction disc housing and the right friction disc housing are fixedly connected to the base through bolts and the limit block.

10. A rope traction device with constant and controllable tension according to claim 3, characterized in that: The thrust bearing fixing member and the bearing seat are both connected to the first base by bolts.

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