A rope traction device with constant and controllable tension

Abstract

The present invention discloses a rope pulling device with constant and controllable tension, which belongs to the technical field of rope pulling equipment. The device includes a base formed by 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 both 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. The present invention adopts the above-mentioned rope pulling 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 pulling 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.

Description

Technical Field

[0001] The present 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] Currently, the application of various rope structures such as cables and wires is becoming increasingly widespread, and corresponding rope pulling devices have also seen significant development. However, in some applications, the rope may be fragile or the working conditions may be unique, which requires certain traction forces during the rope reeling process. To prevent excessive tension generated by the rope pulling device, which may lead to rope breakage or other adverse consequences, it is necessary to ensure a constant traction force, especially during the reeling process of certain metal wires.

[0003] Most existing technologies rely on sensors to monitor the traction force on the rope and passively adjust it accordingly. This approach has a certain response delay and does not achieve constant control of traction force at the mechanical design level. If the sensor fails or is damaged, the entire system will fail, reducing its safety. Furthermore, most traction devices stop working after the rope is retracted, without additional safety measures. This means that the rope may be pulled out again under unexpected external forces, posing a significant safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to provide a rope pulling device with constant and controllable tension, which realizes constant force input from the mechanism design level, ensures 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 pulling 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 objectives, the present invention provides a rope traction device with constant and controllable tension, the base including a first base and a second base fixedly connected, the first base being connected to a driving mechanism, a guide groove being provided on the first base, the thrust bearing fixing member and the bearing seat in the driving mechanism both being able to slide on the first base along the guide groove, the driving mechanism and the locking mechanism on its right side being transmitted by friction, and the locking mechanism being fixedly connected to the base.

[0006] Preferably, one end of the left side of the thrust bearing fixing member 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, 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, 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.

[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 the bearing inside it, and the right friction disc housing is fixedly connected to the 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 outside 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 a rope is wound around the turntable.

[0012] Preferably, the left side of the friction disc housing is fixed with an insertion rod at the four corners, the insertion rod is 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 pulling device with constant and controllable tension, which has the following beneficial effects:

[0016] (1) The present invention realizes the constant force input of the rope traction force from the perspective of mechanism design, ensuring that the rope traction force remains stable and constant during the rope collection process, thus avoiding the rope from breaking due to excessive traction during the rope collection process;

[0017] (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. When the traction force of the rope is less than the set value, the rope release is stopped immediately, ensuring safety.

[0018] (3) The present invention can set the traction force required for the rope during the rope-receiving phase and the locking force required for the rope-releasing phase, 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 during the rope-receiving phase to be greater than the preset value of the locking force during the rope-releasing phase, it is possible to achieve smooth rope release after the rope is reeled in with a constant traction force; by setting the preset value of the traction force during the rope-receiving phase to be less than the preset value of the locking force during the rope-releasing phase, it is possible to achieve locking of the rope after the rope is reeled in with a constant traction force.

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of a rope pulling device with constant and controllable tension according to the present invention;

[0021] Figure 2 Schematic diagram of a driving mechanism of an embodiment of a rope pulling device with constant and controllable tension according to the present invention;

[0022] Figure 3 This is a schematic diagram of a locking mechanism of an embodiment of a rope pulling device with constant and controllable tension according to the present invention;

[0023] Figure 4 The figure is a schematic diagram of the internal structure of the locking mechanism of an embodiment of a rope pulling device with constant and controllable tension according to the present invention.

[0024] Reference numerals

[0025] 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 cover; 108. Bearing seat; 109. Convex spur gear; 110. First fixing plate; 111. Countersunk bolt; 112. Long rod; 113. Nut; 114. Compression spring; 115. Friction plate base; 116. Drive end friction plate; 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

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" 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 object being described changes, the relative positional relationship may also change accordingly.

[0028] Example 1

[0029] like Figures 1 to 2As shown, the present invention provides a rope pulling device with constant and controllable tension. The base 3 comprises a first base 301 and a second base 302, which are fixedly connected. The first base 301 is connected to the drive mechanism 1 and is provided with a guide groove 303. The thrust bearing fixture 101 and bearing seat 108 in the drive mechanism 1 can slide along the guide groove 303 on the first base 301. The force generated by the drive mechanism 1 varies depending on the position of the thrust bearing fixture 101 and bearing seat 108. Because the drive mechanism 1 and its locking mechanism 2 on the right side are driven by friction, the force transmitted by the drive mechanism 1 to the locking mechanism 2 varies, thereby changing the pulling force applied to the rope 5. The locking mechanism 2 is responsible for locking the rope 5 if the preset pulling force is not reached and provides safety protection after the rope is pulled out, preventing the rope 5 from being pulled out by unexpected external forces. The locking mechanism 2 is fixedly connected to the base 3, ensuring the stability and reliability of the entire system.

[0030] 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.

[0031] A first thrust bearing 105 is fixedly mounted on the top right side of the thrust bearing fixture 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 sequentially mounted 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, while the other end passes through the bearing seat cover 107, the bearing seat 108, and the convex spur gear 109 in sequence before being fixedly connected to the first fixed plate 110. The bearing seat cover 107 is bolted to the bearing seat 108 at its bottom, which is bolted to the first base 301. The power input shaft 106 is rotatably connected to both the bearing seat cover 107 and the bearing seat 108. This design not only provides stable support for the power input shaft 106, but also prevents relative displacement between the bearing seat 108 and the bearing seat cover 107 on the first base 301. Because the drive gear 104 is meshed with the convex spur gear 109, when the motor 103 is started, the drive gear 104 rotates, driving the convex spur gear 109 to rotate together. Because 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, ultimately driving the rotation of the first fixed plate 110.

[0032] 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.

[0033] like Figure 4 As shown, the locking end friction disc 201 of the locking mechanism 2 and the driving end friction disc 116 use friction transmission to ensure that the locking mechanism 2 can receive the traction transmitted by the driving mechanism 1 and ensure 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, forming an integral structure. Therefore, the rotation of the locking end friction disc 201 directly drives the rope winding shaft 209 to rotate.

[0034] 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.

[0035] The left friction disc housing 203 is fixedly connected to the bearing 205 within it, while the right friction disc housing 204 is fixedly connected to the second thrust bearing 206 within it. A one-way bearing 208 is disposed 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. A rope winding shaft 209 passes through the bearing 205, the one-way bearing 208, the second thrust bearing 206, and the turntable 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 turntable 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, increasing 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, which rotates with the rope winding shaft 209 to realize the retraction and tensioning control of the rope 5.

[0036] The left friction disc housing 203 is fixed 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.

[0037] Working Principle: During the rope retraction phase, the operator starts motor 103. The output shaft of motor 103 drives drive gear 104, which directly drives convex spur gear 109. This in turn drives the power input shaft 106, first fixed plate 110, friction plate base 115, and drive-end friction plate 116 to rotate synchronously. Power is then transferred from drive mechanism 1 to locking mechanism 2 via drive-end friction plate 116. When the driving force generated by motor 103 exceeds the maximum friction force that can be generated by the pressure exerted by compression spring 114 on drive-end friction plate 116, drive-end friction plate 116 will slip and be unable to transmit the greater driving force, thereby achieving a constant force input to the drive end.

[0038] Aside from the friction disc base 115, the drive-end friction disc 116, the countersunk bolt 111, and the nut 113, all other components of the drive mechanism 1 are unable to move relative to each other in the axial direction. Therefore, they can simultaneously move axially as a whole along the guide slot 303 on the first base 301, thereby varying the compression of the compression spring 114 and, in turn, the driving force that the drive-end friction disc 116 can transmit to the locking mechanism 2. By synchronously assembling the thrust bearing fixture 101 and the bearing seat 108 at different locations on the guide slot 303, the requirements for different traction forces when reeling in different ropes 5 can be met.

[0039] The locking friction disc 201 of the locking mechanism 2 receives the traction force from the drive mechanism 1 and transmits it to the rope winding shaft 209, causing the rope winding shaft 209 to rotate synchronously with the drive system. During the rope retraction process, the rope retraction shaft 209 rotates freely, and the friction wheel 207 does not rotate due to the action of the one-way bearing 208, thus completing the rope retraction process.

[0040] During the rope release phase, turning the locking bolt 210 by different numbers of turns changes the compression of the thrust spring 212, thereby varying the frictional force that must be overcome when the friction wheel 207 and the friction block 214 rotate relative to each other, ultimately setting the desired traction force required for the rope 5 to be released. However, if the traction force on the rope 5 due to the friction block 214 is less than the desired value, the rope 5 cannot be released. Only when the traction force is greater than or equal to the desired value can the rope 5 be released smoothly, thus preventing the rope 5 from being accidentally released due to external forces.

[0041] 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.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. 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 solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A rope pulling device with constant and controllable tension, characterized by: The base includes a first base and a second base that are 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 the right side are driven by friction. The locking mechanism is fixedly connected to the base. One end of the left side of the thrust bearing fixing member 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; A thrust bearing is fixedly provided on the top right side of the thrust bearing fixing member, and a bearing seat upper cover, a convex spur gear and a first fixed plate are sequentially provided on the right side of the thrust bearing. The bearing seat upper 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 upper cover, the bearing seat, 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 upper 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. 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. The friction disc base is fixedly connected to the driving end friction disc on the right side thereof; The locking end friction disc of the locking mechanism and the driving end friction disc are driven by friction, the locking end friction disc is fixedly connected to the second fixed disc on the right side thereof, and the second fixed disc is fixedly connected to the rope winding shaft on the right side thereof; The locking mechanism further comprises a left friction disc housing and a right friction disc housing connected by bolts, wherein 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 bearings and the thrust bearing, and a friction wheel is provided on the outer side of the one-way bearing; The rope winding shaft passes through the bearing, the one-way bearing, the thrust bearing and the turntable in sequence, and the turntable is wound with a rope; The left side of the friction disc housing is fixed with insertion rods at the four corners, the insertion rods are inserted into the friction blocks, the friction blocks are rotatably connected to the friction wheel, the friction blocks are fixedly connected to the thrust springs, the thrust springs are fixedly connected to the spring baffles, and the spring baffles are fixedly connected to the locking bolts passing through the left side of the friction disc housing; During the process of the rope winding shaft collecting the rope, the rope winding shaft rotates freely, and the friction wheel does not rotate under the action of the one-way bearing, thus completing the rope collecting process; The one-way bearing ensures that the rope winding shaft can only rotate freely in one direction, and must rotate together with the friction wheel in the other direction.

2. A rope pulling device with constant and controllable tension according to claim 1, characterized in that: The second base is provided with a limiting block, and the left friction disc housing and the right friction disc housing are fixedly connected to the base through bolts and the limiting block.

3. A rope pulling device with constant and controllable tension according to claim 2, 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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