Clutching pull cable structure

Abstract

The utility model provides a kind of clutching wire structure, it is related to vehicle clutch transmission component field, it includes core wire, the steel wire protection tube of being sleeved in the outside of core wire and the adjusting screw pipe being installed at the both ends of steel wire protection tube, the end of adjusting screw pipe away from steel wire protection tube is equipped with guide sleeve, the guide sleeve uses the composite material of nylon plus glass fibre, one end of the guide sleeve has spherical end, the cavity that is compatible with the spherical end of guide sleeve is equipped in adjusting screw pipe, the spherical end is located in the cavity of adjusting screw pipe and with the clearance fit of the cavity, the utility model solves the problem that steel wire rope reciprocating motion in the clutching line device of prior art, with the rigid right angle edge of adjusting screw inner hole end portion continuous friction causes steel wire wear and tear, reduce maintenance cost and failure risk.

Description

Technical Field

[0001] This utility model relates to the field of vehicle clutch transmission components, and in particular to a clutch cable structure. Background Technology

[0002] In the fields of agricultural tricycles and freight vehicles, the cable-operated clutch structure is a key transmission component for achieving clutch disengagement and engagement, and its operational stability is directly related to the vehicle's handling safety and long-term durability.

[0003] Chinese utility model patent CN202867519U discloses a clutch cable device. The core of the device includes a steel wire rope, a sheath tube, a first clamping ring, an adjusting screw, a connector assembly, and a second clamping ring. The sheath tube is sleeved on the outside of the steel wire rope. One end of the steel wire rope is inserted into the inner hole of the first clamping ring and then into the inner hole of the adjusting screw. The first clamping ring is fixedly connected to the adjusting screw. After the steel wire rope passes through the adjusting screw, it is movably connected to the connector assembly through the second clamping ring. The adjusting screw has threads on its outer circumference, which are used to adjust the installation length and tightness of the clutch cable by cooperating with a nut.

[0004] While the existing clutch cable device has solved the problem of the traditional clutch cable length not being adjustable, it still has a key drawback: during clutch operation, the wire rope needs to reciprocate along its axis. Since the inner end edge of the adjusting screw is a rigid right-angle structure, the outer wall of the reciprocating wire rope will continuously rub against the end edge of the inner hole of the adjusting screw. After long-term use, the wires on the surface of the wire rope are easily worn, increasing the vehicle's maintenance costs and failure risk. Utility Model Content

[0005] This application provides a clutch cable structure that solves the problem of steel wire wear caused by continuous friction between the steel wire rope and the rigid right-angle edge of the inner hole of the adjusting screw during the reciprocating motion of the clutch cable device in the prior art, thereby reducing maintenance costs and failure risks.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a clutch pull cable structure, including a core wire, a steel wire sheath sleeved outside the core wire, and adjusting screw tubes installed at both ends of the steel wire sheath. A guide sleeve is installed at the end of the adjusting screw tube away from the steel wire sheath. The guide sleeve is made of a composite material of nylon and glass fiber. One end of the guide sleeve has a spherical end. The adjusting screw tube has a cavity that matches the spherical end of the guide sleeve. The spherical end is located in the cavity of the adjusting screw tube and is in clearance fit with the cavity.

[0007] When the driver depresses or releases the clutch pedal to control clutch engagement and disengagement, the core wire slides back and forth along the axis of the wire sheath. During this sliding process, the core wire must pass through the guide sleeve at the end of the adjusting screw tube away from the wire sheath tube. Because the adjusting screw tube has a cavity that matches the spherical end of the guide sleeve, the spherical end and the cavity are in clearance fit. The spherical end can adapt to the reciprocating motion of the core wire and rotate flexibly at multiple angles, rather than forming a fixed rigid connection with the adjusting screw tube. This avoids continuous rigid friction between the outer wall of the core wire and the inner end of the adjusting screw tube. Furthermore, the guide sleeve is made of a composite material of nylon and glass fiber, which can effectively reduce the wear and tear on the surface of the wire, reduce the frequency and cost of vehicle maintenance due to core wire wear, and reduce the risk of clutch system failure caused by core wire breakage due to wear.

[0008] As a further improvement to the above solution, the clutch cable structure also includes a dust cover with a pleated structure. One end of the dust cover is fixed to the end of the core wire, and the other end is fixed to the outer wall of the adjusting screw tube. This can prevent impurities from adhering to the surface of the core wire or entering the cavity of the adjusting screw tube, prevent impurities from aggravating the frictional wear between the core wire and the guide sleeve, and also prevent impurities from causing the spherical end of the adjusting screw tube and the guide sleeve to jam.

[0009] As a further improvement to the above solution, the dust cover is fastened at one end of the outer wall of the core wire by a ring clamp, and the dust cover is fixed at one end of the outer wall of the adjusting screw tube by free fitting or glue bonding.

[0010] As a further improvement to the above solution, an annular groove is provided on the outer wall of one end of the adjusting screw tube, and an annular protrusion is provided on the inner side of the end of the dust cover that is fixed to the outer wall of the adjusting screw tube. The annular protrusion on the inner side of the adjusting screw tube is adapted to the annular groove.

[0011] As a further improvement to the above solution, the outer peripheral wall of the adjusting screw is machined with continuous threads along its axial direction, and the threads cover the entire length of the outer peripheral wall of the adjusting screw; thereby, the extension length of the adjusting screw relative to the installation reference can be changed, and the total length of the clutch cable can be finely adjusted, thereby reducing the installation difficulty.

[0012] As a further improvement to the above solution, two thin nuts are also included; the internal threads of the thin nuts are adapted to the threads of the adjusting screw tube, and the two thin nuts are respectively sleeved on the outside of the adjusting screw tube; thereby, by utilizing the friction and preload between the two thin nuts, the adjusting screw tube can be locked on the bracket, ensuring the stability of the clutch cable installation position.

[0013] As a further improvement to the above solution, an insert groove is provided along the axial direction at one end of the adjusting screw tube near the wire sheath; the inner contour of the insert groove is adapted to the outer contour of the end of the wire sheath, and the end of the wire sheath is embedded in the insert groove and fixed to the adjusting screw tube; the insert groove can increase the contact area between the adjusting screw tube and the wire sheath, improve the connection strength, and prevent the two from separating due to vehicle vibration.

[0014] As a further improvement to the above solution, the clutch cable structure also includes two connectors, which are respectively fixedly connected to both ends of the core wire; one of the connectors can be connected to the clutch pedal of the vehicle, and the other connector can be connected to the clutch bracket of the vehicle.

[0015] As can be seen from the above technical solutions, this utility model has at least the following technical effects or advantages: When the driver depresses or releases the clutch pedal to control clutch engagement and disengagement, the core wire slides back and forth along the axis of the wire sheath. During this sliding process, the core wire must pass through the guide sleeve at the end of the adjusting screw tube away from the wire sheath tube. Because the adjusting screw tube has a cavity that matches the spherical end of the guide sleeve, the spherical end and the cavity are in clearance fit. The spherical end can adapt to the reciprocating motion of the core wire and rotate flexibly at multiple angles, rather than forming a fixed rigid connection with the adjusting screw tube. This avoids continuous rigid friction between the outer wall of the core wire and the inner end of the adjusting screw tube. Furthermore, the guide sleeve is made of a composite material of nylon and glass fiber, which can effectively reduce the wear and tear on the surface of the wire, reduce the frequency and cost of vehicle maintenance due to core wire wear, and reduce the risk of clutch system failure caused by core wire breakage due to wear. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A schematic diagram of the structure at the middle left end; Figure 3 for Figure 2 A schematic diagram of the structure after concealing the connecting parts, ring clamps, dust covers, and adjusting nuts.

[0017] Explanation of reference numerals in the attached drawings: 1. Connector; 2. Ring clamp; 3. Dust cover; 4. Guide sleeve; 401. Spherical end; 5. Thin nut; 6. Adjusting screw tube; 601. Annular groove; 7. Core wire; 8. Steel wire sheath. Detailed Implementation To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this patent.

[0018] This utility model discloses a clutch pull cable structure, such as Figures 1 to 3 As shown, it includes a core wire 7, a steel wire sheath 8, an adjusting screw tube 6, and a guide sleeve 4. The steel wire sheath 8 has a tubular structure and is fitted over the core wire 7. The core wire 7 can slide back and forth along the axis of the steel wire sheath 8, thereby transmitting power to the clutch. Two adjusting screw tubes 6 are provided, fixedly installed at both ends of the steel wire sheath 8, for connecting the steel wire sheath 8 to the vehicle's bracket. The guide sleeve 4 is installed at the end of the adjusting screw tube 6 away from the steel wire sheath 8. A spherical end 401 is integrally formed at the end of the guide sleeve 4 closest to the adjusting screw tube 6. Correspondingly, the adjusting screw tube 6 has a cavity inside that matches the shape and size of the spherical end 401. The spherical end 401 is completely accommodated within the cavity of the adjusting screw tube 6, and the two maintain a clearance fit. Therefore, the guide sleeve 4 can rotate flexibly at multiple angles relative to the adjusting screw tube 6, rather than being a fixed rigid connection. When the core wire 7 reciprocates along the axis, the guide sleeve 4 can adaptively adjust its angle according to the movement trend of the core wire 7.

[0019] like Figure 1 , Figure 2 As shown, this utility model also includes a dust cover 3. The dust cover 3 is made of a flexible material such as rubber or elastic plastic, and has an overall stretchable pleated structure, so that the dust cover 3 can stretch or contract with the movement of the core wire 7. The installation position of the dust cover 3 completely covers the outer area of ​​the core wire 7 corresponding to the adjusting screw tube 6. Specifically, one end of the dust cover 3 is fixedly connected to the end of the core wire 7, and the other end is fixedly connected to the outer wall of the adjusting screw tube 6, thereby wrapping the mating part of the core wire 7 and the adjusting screw tube 6, as well as the exposed part of the core wire 7, effectively blocking external dust, mud, rainwater and other impurities from entering, preventing impurities from adhering to the surface of the core wire 7 or entering the cavity of the adjusting screw tube 6.

[0020] like Figure 2As shown, the dust cover 3 is fixed at one end of the outer wall of the core wire 7 by a ring clamp 2. The ring clamp 2 is made of metal, and its inner diameter can be adjusted by shrinking it with a tool. During installation, first, the end of the dust cover 3 is placed on the outer wall of the core wire 7, and then the ring clamp 2 is placed on the outside of the end of the dust cover 3. The ring clamp 2 is tightened with a special tool, so that the dust cover 3 fits against the outer wall of the core wire 7 under the squeezing action of the ring clamp 2. The dust cover 3 is located at one end of the outer wall of the adjusting screw tube 6 and is fixed by free fitting or glue bonding. If free fitting is used, the outer wall of one end of the adjusting screw tube 6 is provided with an annular groove 601, and the inner side of the dust cover 3 is provided with an annular protrusion. The annular protrusion can be embedded into the corresponding annular groove 601 on the outer wall of the adjusting screw tube 6. Thus, the elasticity of the dust cover 3 itself can be used to directly fit its end onto the outer wall of the adjusting screw tube 6, and the elastic tension of the material can be used to maintain the fit. This method does not require additional tools, is convenient to install, and is easy to disassemble for subsequent maintenance. If adhesive is used, apply adhesive evenly to the contact surface between the inner wall of the end of the dust cover 3 and the outer wall of the adjusting screw tube 6, then fit the two together and fix them. After the adhesive cures, a firm connection is formed. This is suitable for scenarios where vehicle vibration is large and the requirements for fixing reliability are higher, and can effectively prevent the dust cover 3 from loosening due to long-term vibration.

[0021] In the specific structure of the adjusting screw 6, the outer peripheral wall of the adjusting screw 6 is machined with continuous threads along its own length. The thread profile is complete and covers the outer periphery of the adjusting screw 6, rather than only having a short section of threads on the outer periphery of the adjusting screw 6. When the clutch cable is installed into the clutch system of a vehicle, the adjusting screw 6 can be rotated clockwise or counterclockwise to cause the threads to engage with the external mating parts, thereby changing the extension length of the adjusting screw 6 relative to the installation reference, ultimately achieving a fine adjustment of the total length of the entire clutch cable, thus reducing the difficulty of installation.

[0022] In addition, each adjusting screw tube 6 is externally fitted with two thin nuts 5. The internal threads of the thin nuts 5 match the threads of the adjusting screw tube 6.

[0023] To enhance the connection reliability between the adjusting screw tube 6 and the wire sheath 8, an insert groove is formed along its axial direction at the end of the adjusting screw tube 6 closest to the wire sheath 8. The inner contour of the insert groove perfectly matches the outer contour of the end of the wire sheath 8, meaning the end of the wire sheath 8 can be precisely embedded in the insert groove. Compared to the traditional end-to-end connection method, the insert groove increases the contact area between the adjusting screw tube 6 and the wire sheath 8, improves the connection strength, and prevents separation due to vehicle vibration. On the other hand, the insert groove ensures the coaxiality of the wire sheath 8 and the adjusting screw tube 6, preventing additional friction caused by axial misalignment when the core wire 7 moves.

[0024] In this embodiment, the guide sleeve 4 is made of a composite material of nylon and glass fiber. Nylon itself has good wear resistance and self-lubricating properties, which can reduce the coefficient of friction when the core wire 7 slides. The addition of glass fiber can significantly improve the structural strength and anti-aging performance of the guide sleeve 4. In terms of assembly process, the guide sleeve 4 is fixedly assembled to the end of the adjusting screw tube 6 by a press-fitting process.

[0025] To achieve effective connection between the core wire 7 and the vehicle's clutch system, the clutch cable structure also includes two connectors 1. The two connectors 1 are fixedly installed at both ends of the core wire 7, and their fixing method can be either snap-fit ​​or threaded connection. One connector 1 connects to the clutch pedal bracket and is connected to the pedal's transmission mechanism via a pin; the other connector 1 connects to the clutch bracket. During actual transmission, when the driver depresses the clutch pedal, the mechanical action of the pedal is transmitted to the core wire 7 through one connector 1. The core wire 7 slides along the axis of the wire sheath 8 and the guide sleeve 4 towards the clutch, and then transmits power to the clutch bracket through the other connector 1, driving the clutch bracket to disengage the clutch. When the driver releases the clutch pedal, the clutch's return spring causes the bracket to move in the opposite direction, pulling the core wire 7 back to its original position via the connector 1, thereby returning the clutch pedal to its initial position.

[0026] Before installation, the core wire 7 is threaded through the steel wire sheath 8, and the adjusting screw tube 6 is installed at both ends of the steel wire sheath 8 through the mounting groove. The guide sleeve 4 is also assembled at the end of the adjusting screw tube 6 by a press-fitting process. The spherical end 401 is located in the cavity of the adjusting screw tube 6 and can rotate. During installation, taking the connection between one end and the clutch bracket as an example, first, a thin nut 5 is inserted from one end of the adjusting screw tube 6, and the adjusting screw tube 6 is passed through the preset mounting hole on the vehicle bracket. Then, another thin nut 5 is inserted from the same end of the adjusting screw tube 6, so that one thin nut 5 is on one side of the bracket and the other thin nut 5 is on the other side of the bracket. Finally, the two thin nuts 5 are tightened towards the bracket using a wrench or other tools until both thin nuts 5 are in contact with the surface of the bracket and abut against each other, thus fixing the adjusting screw tube 6 to the vehicle bracket. Then install the dust cover 3, placing one end of the dust cover 3 over the outside of the adjusting screw tube 6 near the guide sleeve 4. The dust cover 3 has an annular protrusion on its inner side, which can be embedded into the corresponding annular groove 601 on the outer wall of the adjusting screw tube 6 to form a seal. The other end of the dust cover 3 is secured by the ring clamp 2. Next, install the connector 1, fixing it to the end of the core wire 7 via a snap-fit ​​or threaded connection, and aligning the connector 1 with the clutch bracket. The end of the clutch cable structure connected to the clutch pedal is installed in the same manner.

[0027] During daily use, when the driver operates the clutch, the core wire 7 slides back and forth inside the adjusting screw tube 6 and the steel wire protective tube 8. At this time, the spherical end 401 of the guide sleeve 4 rotates in the cavity of the adjusting screw tube 6, which can adapt to the movement angle of the core wire 7 and avoid direct friction between the core wire 7 and the adjusting screw tube 6. In addition, the guide sleeve is made of a composite material of nylon and glass fiber, which can effectively prevent wear of the core wire 7.

[0028] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in its embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A clutch pull wire structure, comprising a core wire (7), a steel wire sheath (8) sleeved on the outside of the core wire (7), and adjusting screws (6) installed at both ends of the steel wire sheath (8), characterized in that, The adjusting screw tube (6) is equipped with a guide sleeve (4) at the end away from the steel wire tube (8). The guide sleeve (4) is made of a composite material of nylon and glass fiber. One end of the guide sleeve (4) has a spherical end (401). The adjusting screw tube (6) is provided with a cavity that matches the spherical end (401) of the guide sleeve (4). The spherical end (401) is located in the cavity of the adjusting screw tube (6) and is in clearance fit with the cavity.

2. The clutch pull cable structure according to claim 1, characterized in that, It also includes a dust cover (3), which has a pleated structure. One end of the dust cover (3) is fixed to the end of the core wire (7), and the other end is fixed to the outer wall of the adjusting screw tube (6).

3. The clutch pull cable structure according to claim 2, characterized in that, The dust cover (3) is fastened at one end of the outer wall of the core wire (7) by a ring clamp (2), and the dust cover (3) is fixed at one end of the outer wall of the adjusting screw tube (6) by free fitting or glue bonding.

4. The clutch pull cable structure according to claim 3, characterized in that, The outer wall of one end of the adjusting screw tube (6) is provided with an annular groove (601), and the inner side of the end of the dust cover (3) that is fixed to the outer wall of the adjusting screw tube (6) is provided with an annular protrusion. The annular protrusion on the inner side of the adjusting screw tube (6) is adapted to the annular groove (601).

5. A clutch cable structure according to claim 1, characterized in that, The outer peripheral wall of the adjusting screw tube (6) is machined with continuous threads along its axial direction, and the threads cover the entire length of the outer peripheral wall of the adjusting screw tube (6).

6. A clutch pull cable structure according to any one of claims 1 to 5, characterized in that, Two thin nuts (5) are fitted on the outside of each adjusting screw tube (6); the internal thread of the thin nut (5) is adapted to the thread of the adjusting screw tube (6), and the two thin nuts (5) are respectively fitted on the outside of the adjusting screw tube (6).

7. A clutch pull cable structure according to claim 6, characterized in that, The adjusting screw tube (6) has an insert groove along its axial direction at one end near the wire sheath tube (8); the inner contour of the insert groove is adapted to the outer contour of the end of the wire sheath tube (8), and the end of the wire sheath tube (8) is embedded in the insert groove and fixed to the adjusting screw tube (6).

8. A clutch pull cable structure according to claim 6, characterized in that, It also includes a connector (1), which is provided in two parts and is fixedly connected to both ends of the core wire (7); one of the connectors (1) can be connected to the clutch pedal of the vehicle, and the other connector (1) can be connected to the clutch bracket of the vehicle.

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