Friction plate positioning structure

Abstract

The utility model discloses a friction plate positioning structure, which relates to the technical field of friction transmission, and comprises two torque transmission pieces, a friction plate arranged between the working surfaces of the two torque transmission pieces, and an elastic pin, a limiting bulge is arranged on the outer side of one end of the elastic pin, and the limiting bulge is arranged on the outer side of the other end of the elastic pin. The other end of the elastic pin penetrates through the friction plate and is inserted into the inserting groove in the working face of one torque transmission piece. A plurality of expansion and contraction seams are formed in the positions, corresponding to the limiting protrusions, of the elastic pin, and the expansion and contraction seams are used for allowing the limiting protrusions to penetrate through the friction plates through contraction. According to the friction plate positioning structure, the friction plate is pre-positioned on the working face of the torque transmission piece through the elastic pin, so that the friction plate is more convenient to connect and position, meanwhile, the friction plate does not deform, and the friction transmission effect of the two torque transmission pieces is ensured.

Description

Technical Field

[0001] This utility model relates to the field of friction transmission technology, specifically a friction plate positioning structure. Background Technology

[0002] Traditional torque transmission methods often rely solely on simple bolt tightening. In this method, the two connecting surfaces are mainly in direct contact through machined surfaces. Due to the low coefficient of friction, large shear forces are easily generated when subjected to load impacts, thus shortening the bolt's service life and reducing its torque transmission capacity. Adding friction pads between the two torque transmission components can improve torque transmission stability and reduce shear forces.

[0003] Currently, the common method for installing friction plates is to drill "X" holes in the friction plate and use internal hexagon countersunk screws to pass through the friction plate and fix it into the threaded hole on the working surface. During the installation process, the head of the countersunk screw bends the extension of the X-shaped hole as it moves downward, so that it is buried under the head of the countersunk screw until the end face of the head of the countersunk screw is completely lower than the plane of the friction plate. Then, the other working surface is bolted to the working surface.

[0004] The following problems exist: the star-shaped hole installation method causes the extended part to bend downwards irreversibly, making it difficult to securely fasten during secondary installation due to the downward deformation. The downward bending of the extended part caused by the star-shaped hole installation makes it easy for hard particles at the corners of the friction plate to fall off, and the friction area within the star-shaped hole range is a loss area, affecting the friction transmission effect; in addition, there is friction between the mounting screw and the extended part of the friction plate mounting hole, resulting in significant screw wear and easy damage, leading to increased installation costs.

[0005] Therefore, it is necessary to propose a friction pad positioning structure to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] The purpose of this invention is to provide a friction pad positioning structure to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: a friction plate positioning structure, including a torque transmission component, a friction plate is provided between the working surfaces of the two torque transmission components, and an elastic pin, a limiting protrusion is provided on the outer side of one end of the elastic pin, and the other end of the elastic pin passes through the friction plate and is inserted into a slot on the working surface of one of the torque transmission components.

[0010] The elastic pin has several expansion and contraction slots at positions corresponding to the limiting protrusions, which allow the limiting protrusions to pass through the friction plate by contraction.

[0011] Preferably, the friction plate has a through hole, the diameter of which is adapted to the outer diameter of the elastic pin, and the outer diameter of the limiting protrusion is larger than the diameter of the through hole.

[0012] Preferably, the slot is a stepped slot, the slot including a first step and a second step, wherein the diameter of the first step is larger than the outer diameter of the limiting protrusion.

[0013] Preferably, the depth of the slot is greater than the length of the resilient pin.

[0014] Preferably, bolt holes are provided at corresponding positions of the torque transmission component and the friction plate, and the two torque transmission components are fixed by fastening bolts.

[0015] Preferably, a groove is formed on one side of the elastic pin along its axial direction, and the expansion joint is formed along the axial direction of the elastic pin.

[0016] Preferably, the limiting protrusion is annular, and there is a smooth arc transition between the limiting protrusion and the elastic pin.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a friction pad positioning structure, which has the following beneficial effects:

[0019] 1. The friction plate positioning structure uses an elastic pin to pre-position the friction plate on the working surface of the torque transmission component, aligning the friction plate with the torque transmission component. The limiting protrusion further limits the position, preventing the friction plate from sliding relative to the elastic pin and the torque transmission component. This makes the connection of the friction plate more convenient. At the same time, this positioning method prevents the friction plate from deforming, ensuring the friction transmission effect of the two torque transmission components.

[0020] 2. The friction plate positioning structure has expansion and contraction slots and grooves on the outside of the elastic pin. Under the action of the expansion and contraction slots, the end of the elastic pin with the limiting protrusion expands and contracts so that the limiting protrusion can contract and pass through the friction plate. Under the action of the grooves, the elastic pin is ensured to contract as a whole so that it can be inserted into the slot, making its installation and positioning more convenient. Attached Figure Description

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

[0022] Figure 2 This is a three-dimensional schematic diagram of the elastic pin of this utility model;

[0023] Figure 3 This is a three-dimensional schematic diagram of the pre-positioned state of the friction plate of this utility model;

[0024] Figure 4This is a schematic cross-sectional view of the friction plate of this utility model in its pre-positioning state;

[0025] Figure 5 This is a cross-sectional schematic diagram of the structure of this utility model.

[0026] In the diagram: 1. Torque transmission component; 2. Friction plate; 3. Fastening bolt; 4. Elastic pin; 5. Slot; 6. First step; 7. Second step; 8. Bolt hole; 9. Limiting protrusion; 10. Expansion / contraction joint; 11. Groove; 12. Through hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Please see Figure 1-5 As shown, a friction plate positioning structure includes a torque transmission component 1, a friction plate 2 is provided between the working surfaces of two torque transmission components 1, and an elastic pin 4. One end of the elastic pin 4 has a limiting protrusion 9 on its outer side, and the other end of the elastic pin 4 passes through the friction plate 2 and is inserted into a slot 5 on the working surface of one of the torque transmission components 1. Several expansion and contraction slots 10 are opened on the elastic pin 4 at positions corresponding to the limiting protrusion 9. The expansion and contraction slots 10 are used to allow the limiting protrusion 9 to pass through the friction plate 2 by contraction.

[0029] When connecting the two torque transmission components 1, the friction plate 2 is placed on the working surface with the slot 5. The end of the elastic pin 4 without the limiting protrusion 9 is inserted through the friction plate 2 into the slot 5. Under the action of the limiting protrusion 9, the friction plate 2 is pre-positioned on the working surface. Then, the two torque transmission components 1 are connected and fixed. Under the action of the other working surface, the elastic pin 4 is pushed to slide into the slot 5. The elastic pin 4 undergoes elastic deformation, and the limiting protrusion 9 contracts and passes through the friction plate 2, so that both sides of the friction plate 2 are tightly fitted with the working surfaces of the two torque transmission components 1 respectively.

[0030] By setting a limiting protrusion 9 on the outside of the elastic pin 4, when the friction plate 2 is pre-positioned, the limiting protrusion 9 can press the friction plate 2 onto the working surface of the torque transmission component 1 to prevent its position from shifting.

[0031] Specifically, in order to facilitate the passage of the elastic pin 4 through the friction plate 2, a through hole 12 is provided on the friction plate 2. The diameter of the through hole 12 is adapted to the outer diameter of the elastic pin 4. By providing a through hole 12 on the friction plate 2, deformation of the friction plate 2 is prevented when the elastic pin 4 passes through it, thus avoiding the shedding of particles from the surface of the friction plate 2 and ensuring its friction effect. In order to facilitate the limiting of the friction plate 2 by the limiting protrusion 9, the outer diameter of the limiting protrusion 9 is larger than the diameter of the through hole 12, and the diameter of the through hole 12 is not smaller than the outer diameter of the elastic pin 4, so that the elastic pin 4 can pass through the through hole 12.

[0032] To prevent the elastic pin 4 from deforming and losing its positioning effect on the friction plate 2 after the two torque transmission components 1 are combined, the slot 5 is a stepped slot, including a first step 6 and a second step 7. The diameter of the first step 6 is larger than the outer diameter of the limiting protrusion 9. When the elastic pin 4 undergoes elastic deformation, causing the limiting protrusion 9 to pass through the friction plate 2, the limiting protrusion 9 enters the interior of the first step 6, the elastic pin 4 resets, and limits the friction plate 2.

[0033] Specifically, the depth of slot 5 is greater than the length of elastic pin 4. The outer diameter of elastic pin 4 is slightly larger than the diameter of the second step 7, so that elastic pin 4 is always in a slightly contracted state, preventing elastic pin 4 from sliding when not subjected to external force.

[0034] In some embodiments, bolt holes 8 are provided at corresponding positions of the torque transmission component 1 and the friction plate 2, and the two torque transmission components 1 are fixed by fastening bolts 3.

[0035] In order to meet the expansion and contraction requirements of the elastic pin 4, in some embodiments, a slot 11 is provided on one side of the elastic pin 4 along its axial direction, and expansion and contraction slits 10 are opened along the axial direction of the elastic pin 4, with multiple expansion and contraction slits 10 evenly distributed.

[0036] To allow the limiting protrusion 9 to smoothly pass through the through hole 12 and the friction plate 2, the limiting protrusion 9 is annular, and there is a smooth arc transition between the limiting protrusion 9 and the elastic pin 4. When the elastic pin 4 is pushed into the slot 5 by the torque transmission component 1, the elastic pin 4 is more likely to deform and shrink under the action of the arc transition surface.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A friction plate positioning structure, comprising a torque transmission component (1), wherein a friction plate (2) is disposed between the working surfaces of the two torque transmission components (1), characterized in that: It also includes an elastic pin (4), one end of which is provided with a limiting protrusion (9), and the other end of which passes through the friction plate (2) and is inserted into the slot (5) on the working surface of one of the torque transmission components (1); The elastic pin (4) has several expansion and contraction slots (10) at positions corresponding to the limiting protrusion (9). The expansion and contraction slots (10) are used to allow the limiting protrusion (9) to pass through the friction plate (2) by contraction.

2. The friction pad positioning structure according to claim 1, characterized in that: The friction plate (2) has a through hole (12) with the diameter of the through hole (12) matching the outer diameter of the elastic pin (4). The outer diameter of the limiting protrusion (9) is larger than the diameter of the through hole (12).

3. The friction pad positioning structure according to claim 1, characterized in that: The slot (5) is a stepped slot, and the slot (5) includes a first step (6) and a second step (7). The diameter of the first step (6) is greater than the outer diameter of the limiting protrusion (9).

4. The friction pad positioning structure according to claim 1, characterized in that: The depth of the slot (5) is greater than the length of the elastic pin (4).

5. The friction pad positioning structure according to claim 1, characterized in that: Bolt holes (8) are provided at corresponding positions of the torque transmission component (1) and the friction plate (2), and the two torque transmission components (1) are fixed by fastening bolts (3).

6. The friction pad positioning structure according to claim 1, characterized in that: A slot (11) is provided on one side of the elastic pin (4) along its axial direction, and the expansion joint (10) is provided along the axial direction of the elastic pin (4).

7. The friction pad positioning structure according to claim 1, characterized in that: The limiting protrusion (9) is annular, and there is a smooth arc transition between the limiting protrusion (9) and the elastic pin (4).

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