A cable tightener overload protection mechanism based on a ramped block elastomer

Abstract

The utility model belongs to cable winding technical field discloses a kind of cable take-up device overload protection mechanism based on inclined block elastomer, including base, winding shaft and winding sleeve, both ends of base are fixedly connected with vertical rod, both ends of winding shaft are fixedly connected with rotating shaft, winding shaft is rotatably installed between two vertical rods by rotating shaft, winding sleeve is rotatably sleeved on winding shaft, both ends of winding shaft are provided with overload protection assembly, overload protection assembly includes inclined block, the end of winding shaft is provided with limit sliding slot, the inner wall of inclined block is fixedly connected with guide sliding block, guide sliding block is slidably inserted in limit sliding slot, the inner wall of both ends of winding sleeve is provided with damping groove, inclined block is inserted in the inside of damping groove, the utility model is cooperated by the friction contact of inclined block and damping groove, when cable tension overload, the torque between winding shaft and winding sleeve exceeds threshold value, so that winding sleeve no longer rotates synchronously with winding shaft, avoid cable damage due to overload, guarantee construction safety.

Description

Technical Field

[0001] This utility model relates to the field of cable winding technology, and in particular to an overload protection mechanism for a cable tensioner based on a wedge-shaped elastic body. Background Technology

[0002] Cable tensioning devices are specialized equipment used to apply tension to cables to achieve a preset tightness. They are widely used in cable installation in various fields such as power, communications, and transportation, significantly improving construction efficiency and ensuring the quality of cable fastening.

[0003] Chinese utility model patent CN223194307U discloses a cable tensioning device, comprising a main frame, a fixed rod fixedly connected to the main frame, a guide ring fixed to the end of the fixed rod, a tensioning roller for winding and tensioning the cable, and an auxiliary bearing for movably connecting the tensioning roller and the main frame. The tensioning roller has an insertion hole, and the main frame also includes a clamping assembly and an operating assembly. The clamping assembly includes a clamping plate for clamping the cable, a connecting cylinder fixedly connected to the clamping plate, a connecting nut fixedly installed inside the connecting cylinder, and a threaded rod threadedly connected to the connecting nut. This cable tensioning device, by setting the clamping assembly on the tensioning roller, allows the cable end to be quickly clamped and fixed onto the tensioning roller after insertion, simplifying the operation of the entire device and improving its tensioning efficiency.

[0004] However, the above-mentioned device was not equipped with corresponding overload protection measures during use. When the tension on the cable unexpectedly exceeds the safety threshold, it is easy to cause risks such as excessive stretching or even breakage of the cable, which will not only delay the construction progress, but may also cause safety hazards.

[0005] To address this, an overload protection mechanism for a cable tensioner based on a chamfered block elastomer is proposed. Utility Model Content

[0006] The purpose of this invention is to provide an overload protection mechanism for a cable tensioner based on a wedge-shaped elastomer, thereby solving or at least alleviating one or more of the aforementioned problems and other issues existing in the prior art.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] An overload protection mechanism for a cable tensioner based on a wedge-shaped elastic body includes a base, a winding shaft, and a winding sleeve. Both ends of the base are fixedly connected to uprights, and both ends of the winding shaft are fixedly connected to rotating shafts. The winding shaft is rotatably mounted between the two uprights via the rotating shafts, and the winding sleeve is rotatably sleeved on the winding shaft.

[0009] Both ends of the take-up shaft are provided with overload protection components. Both sets of overload protection components include wedges. The wedges are arranged in the shape of a frustum tube. A limit groove is opened at the end of the take-up shaft. A guide slider is fixedly connected to the inner wall of the wedge. The guide slider is slidably inserted into the limit groove. Both ends of the take-up sleeve are provided with damping grooves on their inner walls. The wedges are inserted into the inside of the damping grooves. The outer wall of the wedges is in frictional contact with the inner wall of the damping grooves.

[0010] In a cable tensioner overload protection mechanism based on a chamfered block elastic body according to the present invention, the overload protection component further includes a damping adjustment component, the damping adjustment component includes an adjusting nut, the end of the winding shaft is provided with an external thread, and the adjusting nut is threadedly installed on the winding shaft.

[0011] In a cable tensioner overload protection mechanism based on a wedge-shaped elastic body according to the present invention, a spring is provided between the adjusting nut and the wedge, the spring is sleeved on the winding shaft, one end of the spring abuts against one side of the wedge, and the other end of the spring abuts against the adjusting nut.

[0012] In an overload protection mechanism for a cable tensioner based on a wedge-shaped elastic body according to the present invention, a first limiting ring is fixedly connected to one side of the wedge, a second limiting ring is fixedly connected to one side of the adjusting nut, one end of the spring is sleeved on the first limiting ring, and the other end of the spring is sleeved on the second limiting ring.

[0013] In an overload protection mechanism for a cable tensioner based on a chamfered block elastic body according to the present invention, a ratchet tooth is hinged to one side of the upright of the ratchet, and an elastic plate is fixedly connected to the upright near the ratchet tooth, with the elastic movable end of the elastic plate abutting against the upper end of the ratchet tooth.

[0014] In an overload protection mechanism for a cable tensioner based on a chamfered block elastomer according to the present invention, a handwheel is fixedly connected to one end of the shaft away from the ratchet.

[0015] In an overload protection mechanism for a cable tensioner based on a chamfered block elastomer according to the present invention, the base is arranged in an I-shape.

[0016] In an overload protection mechanism for a cable tensioner based on a wedge-shaped elastomer according to the present invention, the wedge is a rubber block.

[0017] This utility model has at least the following beneficial effects:

[0018] By using the frictional contact between the inclined block and the damping groove, when the cable tension is overloaded, the torque between the winding shaft and the winding sleeve exceeds the threshold, causing the winding sleeve to stop rotating synchronously with the winding shaft, thus preventing the cable from being damaged due to overload and ensuring construction safety.

[0019] With the help of the adjusting nut and spring, rotating the adjusting nut can change the frictional damping between the inclined block and the damping groove, thereby adjusting the torque threshold for overload protection to start. It can be flexibly adapted to different cable types and construction needs, improving the versatility of the mechanism. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the right-side structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the winding shaft in this utility model;

[0024] Figure 4 This is a partial structural schematic diagram of the present invention;

[0025] Figure 5 This is a schematic diagram of the inclined block of this utility model;

[0026] Figure 6 This is a cross-sectional structural diagram of the winding sleeve of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Base; 101. Upright pole; 2. Take-up shaft; 201. Rotating shaft; 202. Limiting groove; 203. Handwheel; 3. Ratchet; 4. Ratchet tooth; 5. Elastic plate; 6. Take-up sleeve; 601. Damping groove; 7. Inclined block; 701. Guide slider; 702. First limiting ring; 8. Adjusting nut; 801. Second limiting ring; 9. Spring. Detailed Implementation

[0029] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] Please refer to Figures 1 to 3As shown, an embodiment of this utility model provides an overload protection mechanism for a cable tensioner based on a wedge-shaped elastic body, including a base 1, a winding shaft 2, and a winding sleeve 6. Both ends of the base 1 are fixedly connected to uprights 101, and both ends of the winding shaft 2 are fixedly connected to rotating shafts 201. The winding shaft 2 is rotatably mounted between the two uprights 101 via the rotating shafts 201. The winding sleeve 6 is rotatably sleeved on the winding shaft 2. Both ends of the winding shaft 2 are provided with overload protection components. Both sets of overload protection components include wedges 7, which are arranged in a frustum-shaped tubular form. A limiting groove 202 is provided at the end of the winding shaft 2. A guide slider 701 is fixedly connected to the inner wall of the wedge 7, and the guide slider 701 is slidably inserted into the limiting groove 202. Damping grooves 601 are provided on the inner walls of both ends of the winding sleeve 6. The wedge 7 is inserted into the inside of the damping groove 601, and the outer wall of the wedge 7 is in frictional contact with the inner wall of the damping groove 601.

[0031] By adopting the above technical solution, the base 1 supports the entire mechanism, and the uprights 101 are fixed at both ends of the base 1, providing support points for the winding shaft 2. The winding shaft 2 can rotate between the uprights 101 via the pivots 201 at both ends for winding the cable. The winding sleeve 6 is fitted onto the winding shaft 2 and can rotate relative to it. The wedge block 7 rotates with the winding shaft 2 within the limiting groove 202 via the guide slider 701. At the same time, the outer wall of the wedge block 7 rubs against the damping groove 601 on the inner wall of the winding sleeve 6, transmitting torque to make the winding sleeve 6 rotate synchronously to wind the cable. If the cable tension is normal, the winding sleeve 6 rotates with the winding shaft 2. When the cable tension is overloaded, the torque between the winding shaft 2 and the winding sleeve 6 increases, and the friction force on the wedge block 7 within the damping groove 601 increases. When the torque exceeds the friction force between the wedge block 7 and the damping groove 601, the winding sleeve 6 no longer rotates synchronously with the winding shaft 2, thus providing overload protection.

[0032] In this embodiment, the overload protection component also includes a damping adjustment component, which includes an adjusting nut 8. The end of the winding shaft 2 is provided with an external thread, and the adjusting nut 8 is threadedly installed on the winding shaft 2.

[0033] By adopting the above technical solution, the adjusting nut 8 is threaded onto the external thread at the end of the take-up shaft 2. Rotating the adjusting nut 8 changes its position on the take-up shaft 2. When the adjusting nut 8 moves towards the wedge block 7, it generates a thrust on the wedge block 7, causing the wedge block 7 to contact the inner wall of the damping groove 601 more tightly, increasing the frictional damping, thereby adjusting the torque threshold for the overload protection mechanism to start; conversely, when the adjusting nut 8 moves away from the wedge block 7, the contact between the wedge block 7 and the inner wall of the damping groove 601 becomes looser, the frictional damping decreases, and the torque threshold for the overload protection mechanism to start decreases.

[0034] In this embodiment, a spring 9 is provided between the adjusting nut 8 and the inclined block 7. The spring 9 is sleeved on the winding shaft 2, with one end of the spring 9 abutting against one side of the inclined block 7 and the other end of the spring 9 abutting against the adjusting nut 8.

[0035] By adopting the above technical solution, the spring 9 can apply pressure to the adjusting nut 8 and the inclined block 7, so that the adjusting nut 8 will not easily rotate.

[0036] In this embodiment, a first limiting ring 702 is fixedly connected to one side of the inclined block 7, a second limiting ring 801 is fixedly connected to one side of the adjusting nut 8, one end of the spring 9 is sleeved on the first limiting ring 702, and the other end of the spring 9 is sleeved on the second limiting ring 801.

[0037] By adopting the above technical solution, the first limiting ring 702 is fixed to one side of the wedge block 7, and the second limiting ring 801 is fixed to one side of the adjusting nut 8. The two ends of the spring 9 are respectively fitted onto these two limiting rings. The function of the limiting rings is to ensure that the spring 9 will not axially shift or fall off during operation, enabling the spring 9 to stably transmit force between the adjusting nut 8 and the wedge block 7. This improves the stability and reliability of the mechanism's operation.

[0038] In this embodiment, a ratchet 3 is fixedly installed on one of the rotating shafts 201, and a ratchet 4 is hinged to one side of the upright 101 near the ratchet 3. An elastic plate 5 is fixedly connected to the upright 101 near the ratchet 4, and the elastic movable end of the elastic plate 5 abuts against the upper end of the ratchet 4.

[0039] By adopting the above technical solution, when the cable is wound up by rotating the take-up shaft 2 with external force, the rotating shaft 201 connected to the take-up shaft 2 drives the ratchet 3 to rotate. Since the ratchet 4 is hinged to one side of the upright 101, and the elastic movable end of the elastic plate 5 abuts against the upper end of the ratchet 4, the ratchet 4 can only prevent the ratchet 3 from reversing in one direction. During the winding process, the ratchet 3 rotates in the forward direction, and the ratchet 4 moves downward around the hinge point under the push of the ratchet 3 teeth. When the ratchet 3 teeth pass the ratchet 4, the ratchet 4 is lifted under the elastic force of the elastic plate 5, preventing the ratchet 3 from reversing. This ensures that even if the external force suddenly disappears or decreases when winding the cable, the cable will not loosen due to the reversal of the take-up shaft 2, playing a one-way locking role and ensuring the stability of the winding.

[0040] In this embodiment, a handwheel 203 is fixedly connected to one end of the rotating shaft 201 away from the ratchet 3.

[0041] By adopting the above technical solution, the handwheel 203 is fixed at one end of the shaft 201 away from the ratchet 3, providing a point of force application for the operator. The operator rotates the handwheel 203, causing the shaft 201 to rotate, which in turn rotates the winding shaft 2, thus achieving the cable winding operation. The design of the handwheel 203 increases the radius of force application for the operator. According to the lever principle, under the same torque requirement, the operator needs less force to rotate the handwheel 203, making the operation more labor-saving and convenient, and improving the ease of cable winding.

[0042] In this embodiment, the base 1 is arranged in an I-shape.

[0043] By adopting the above technical solution, the base 1 is arranged in an I-shape. This shape design increases the contact area between the base 1 and the placement plane, improving the stability of the entire mechanism when placed. At the same time, the I-shape structure can save materials and reduce the overall weight of the mechanism compared with other shapes while ensuring a certain strength.

[0044] In this embodiment, the inclined block 7 is a rubber block.

[0045] By adopting the above technical solution, the inclined block 7 is made of rubber, which has good elasticity and friction properties. Its elasticity allows the inclined block 7 to better adapt to different torque changes when in contact with the inner wall of the damping groove 601, and to buffer torque impact through its own elastic deformation during overload. Good friction properties ensure that during normal operation, the inclined block 7 can effectively transmit the torque of the winding shaft 2 to the winding sleeve 6, achieving normal cable winding. At the same time, the relatively soft material of the rubber block makes it less likely to damage the surfaces of other components during contact and friction, extending the service life of the mechanism.

[0046] Working principle:

[0047] According to the actual cable winding requirements, the torque threshold for activating the overload protection mechanism is adjusted by rotating the adjusting nut 8. If it is necessary to increase the torque threshold, that is, to increase the sensitivity of the overload protection, the adjusting nut 8 is rotated towards the inclined block 7. At this time, the adjusting nut 8 will generate a thrust on the inclined block 7, making the inclined block 7 more tightly contact the inner wall of the damping groove 601, thereby increasing the frictional damping.

[0048] Conversely, to reduce the torque threshold, the adjusting nut 8 is rotated away from the wedge block 7, which loosens the contact between the wedge block 7 and the inner wall of the damping groove 601, thus reducing the frictional damping.

[0049] Cable winding operation:

[0050] The operator holds the handwheel 203 and turns it. The rotation of the handwheel 203 drives the connected shaft 201 to rotate, which in turn drives the winding shaft 2 to rotate.

[0051] When the take-up shaft 2 rotates, the inclined block 7 rotates synchronously with the take-up shaft 2 in the limiting groove 202 through the guide slider 701. At the same time, the outer wall of the inclined block 7 rubs against the damping groove 601 of the inner wall of the take-up sleeve 6, transmitting the torque of the take-up shaft 2 to the take-up sleeve 6, so that the take-up sleeve 6 rotates synchronously to take up the cable.

[0052] During the winding process, the rotating shaft 201 connected to the winding shaft 2 drives the ratchet 3 to rotate. When the ratchet 3 rotates in the forward direction, the ratchet 4 moves downward around the hinge point under the push of the ratchet 3 teeth. After the ratchet 3 teeth pass the ratchet 4, the ratchet 4 is lifted under the elastic force of the elastic plate 5 to prevent the ratchet 3 from reversing, ensuring the stability of cable winding and preventing the cable from loosening due to the disappearance or reduction of external force.

[0053] Overload protection response:

[0054] When the cable tension is overloaded, the torque between the take-up shaft 2 and the take-up sleeve 6 increases, and the friction force on the wedge block 7 in the damping groove 601 increases. When the torque is greater than the friction force between the wedge block 7 and the damping groove 601, the take-up sleeve 6 no longer rotates synchronously with the take-up shaft 2, thereby playing an overload protection role and preventing the cable from being damaged due to overload.

[0055] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A ramped block elastomeric based cable tightener overload protection mechanism, characterized by, The device includes a base (1), a winding shaft (2), and a winding sleeve (6). Both ends of the base (1) are fixedly connected to uprights (101), and both ends of the winding shaft (2) are fixedly connected to rotating shafts (201). The winding shaft (2) is rotatably mounted between the two uprights (101) via the rotating shafts (201), and the winding sleeve (6) is rotatably sleeved on the winding shaft (2). Both ends of the take-up shaft (2) are provided with overload protection components. Both sets of overload protection components include a wedge (7). The wedge (7) is arranged in the shape of a frustum tube. The end of the take-up shaft (2) is provided with a limiting groove (202). The inner wall of the wedge (7) is fixedly connected with a guide slider (701). The guide slider (701) is slidably inserted into the limiting groove (202). Both ends of the take-up sleeve (6) are provided with damping grooves (601). The wedge (7) is inserted into the inside of the damping groove (601). The outer wall of the wedge (7) is in frictional contact with the inner wall of the damping groove (601).

2. A ramped block elastomeric cable tightener overload protection mechanism according to claim 1, characterised in that: The overload protection assembly also includes a damping adjustment component, which includes an adjusting nut (8). The end of the winding shaft (2) is provided with an external thread, and the adjusting nut (8) is threaded onto the winding shaft (2).

3. A ramped block elastomeric cable tightener overload protection mechanism according to claim 2, characterised in that: A spring (9) is provided between the adjusting nut (8) and the inclined block (7). The spring (9) is sleeved on the winding shaft (2). One end of the spring (9) abuts against one side of the inclined block (7), and the other end of the spring (9) abuts against the adjusting nut (8).

4. A ramped block elastomeric cable tightener overload protection mechanism according to claim 3, characterised in that: A first limiting ring (702) is fixedly connected to one side of the inclined block (7), a second limiting ring (801) is fixedly connected to one side of the adjusting nut (8), one end of the spring (9) is sleeved on the first limiting ring (702), and the other end of the spring (9) is sleeved on the second limiting ring (801).

5. A ramped block elastomeric cable tightener overload protection mechanism according to claim 1, wherein: A ratchet (3) is fixedly installed on one of the rotating shafts (201), and a ratchet tooth (4) is hinged on the side of the upright (101) near the ratchet (3). An elastic plate (5) is fixedly connected to the upright (101) near the ratchet tooth (4), and the elastic movable end of the elastic plate (5) abuts against the upper end of the ratchet tooth (4).

6. A ramped block elastomeric cable tightener overload protection mechanism according to claim 5, wherein: A handwheel (203) is fixedly connected to one end of the shaft (201) away from the ratchet (3).

7. A ramped block elastomeric cable tightener overload protection mechanism according to claim 1, wherein: The base (1) is arranged in an I-shape.

8. An overload protection mechanism for a cable tensioner based on a chamfered block elastomer according to any one of claims 1-7, characterized in that: The inclined block (7) is a rubber block.

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