Friction plate fixing structure and fixing mode thereof

Abstract

The invention discloses a friction plate fixing structure and a fixing mode thereof, and relates to the technical field of friction transmission, the friction plate fixing structure comprises torque transmission pieces, a friction plate is arranged between the working surfaces of the two torque transmission pieces, the friction plate fixing structure further comprises an elastic pin, and a limiting protrusion is arranged on the outer side of one 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 fixing structure and the fixing mode thereof, 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] The invention relates to the technical field of friction transmission, and in particular to a friction plate fixing structure and a fixing method thereof. Background Art

[0002] Traditional torque transmission methods often rely only on simple bolt tightening. In this method, the two connection surfaces are directly in contact mainly through machined surfaces. Due to the low friction coefficient, it is easy to generate large shear force when responding to load impact, thereby shortening the service life of the bolt and reducing its torque transmission capacity. By adding a friction plate between the two torque transmission parts, the torque transmission stability can be improved and the shear force can be reduced.

[0003] At present, the installation method of the friction plate is usually to open a "Pozi hole" on the friction plate, and use a hexagon socket countersunk screw to pass through the friction plate to fix it to the threaded hole of the working surface; during the installation process, the head of the countersunk screw bends the extended part of the Pozi hole during the downward movement, 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, and then the other working surface is bolted to the working surface.

[0004] The following problems exist: the installation method of the 'M' hole will cause the extension part to bend downward and cannot be restored. When it is used for the second installation, it cannot be tightened firmly due to the deformation of the bending. The installation of the 'M' hole causes the extension part to bend downward, which makes it easy for hard particles at the corners of the friction plate to fall off. In addition, the friction area of ​​the product within the range of the 'M' hole is a loss area, which affects the friction transmission effect. In addition, there is friction between the installation screw and the extension part of the friction plate installation hole, and the screw wears a lot and is easily damaged, which increases the installation cost.

[0005] Therefore, it is necessary to propose a friction plate fixing structure and a fixing method thereof to solve the above problems. Summary of the invention

[0006] 1. Technical issues to be resolved The object of the present invention is to provide a friction plate fixing structure and a fixing method thereof to solve the problems raised in the above background technology.

[0007] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a friction plate fixing structure, including a torque transmission member, a friction plate is arranged between the working surfaces of two torque transmission members, and an elastic pin, a limiting protrusion is arranged on the outer side of one end of the elastic pin, and the other end of the elastic pin penetrates the friction plate and is inserted into a slot on the working surface of one of the torque transmission members; A plurality of expansion and contraction gaps are provided on the elastic pin at positions corresponding to the limiting protrusions, and the expansion and contraction gaps are used to allow the limiting protrusions to pass through the friction plate by contraction.

[0008] Preferably, a through hole is provided on the friction plate, the diameter of the through hole is matched with the outer diameter of the elastic pin, and the outer diameter of the limiting protrusion is larger than the diameter of the through hole.

[0009] Preferably, the slot is a stepped slot, and the slot comprises a first step and a second step, and the diameter of the first step is larger than the outer diameter of the limiting protrusion.

[0010] Preferably, the depth of the slot is greater than the length of the elastic pin.

[0011] Preferably, bolt holes are provided at corresponding positions of the torque transmission member and the friction plate, and the two torque transmission members are fixed by fastening bolts.

[0012] Preferably, a notch is provided on one side of the elastic pin along its axial direction, and the expansion and contraction seam is provided along the axial direction of the elastic pin.

[0013] Preferably, the limiting protrusion is annular, and there is a smooth arc-shaped transition between the limiting protrusion and the elastic pin.

[0014] A friction plate fixing method includes the following steps: S1, a slot is formed on the transmission surface of one of the torque transmission parts, and a through hole is formed at a position of the friction plate corresponding to the slot; S2, passing the end of the elastic pin without the limiting protrusion through the through hole through the friction plate and inserting it into the slot, and positioning the friction plate by the limiting protrusion; S3, connecting the two torque transmission members, the transmission surface of the other torque transmission member pushes the elastic pin to make the limiting protrusion shrink and pass through the friction plate; S4. Connect and fix the two torque transmission parts.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a friction plate fixing structure and a fixing method thereof, which have the following beneficial effects: 1. The friction plate fixing structure and fixing method pre-position the friction plate on the working surface of the torque transmission part through the elastic pin, so that the friction plate and the torque transmission part are aligned, and the limiting protrusion is used to limit the friction plate to prevent the friction plate from sliding relative to the elastic pin and the torque transmission part, thereby making the connection of the friction plate more convenient. At the same time, with this positioning method, the friction plate will not be deformed, ensuring the friction transmission effect of the two torque transmission parts.

[0016] 2. The friction plate fixing structure and fixing method thereof are provided with expansion and contraction seams and notches on the outer side of the elastic pin. Under the action of the expansion and contraction seams, one end of the elastic pin provided with a limiting protrusion expands and contracts so that the limiting protrusion can be contracted to pass through the friction plate. Under the action of the notch, the elastic pin is ensured to be contracted as a whole so that it can be inserted into the slot, making its installation and positioning more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a three-dimensional schematic diagram of the elastic pin of the present invention; Figure 3 It is a three-dimensional schematic diagram of the pre-positioning state of the friction plate of the present invention; Figure 4 It is a cross-sectional schematic diagram of the pre-positioning state of the friction plate of the present invention; Figure 5 It is a cross-sectional schematic diagram of the structure of the present invention.

[0018] In the figure: 1, torque transmission part; 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 and contraction joint; 11, notch; 12, through hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-5 As shown, a friction plate fixing structure and a fixing method thereof include a torque transmission member 1, a friction plate 2 is arranged between the working surfaces of the two torque transmission members 1, and an elastic pin 4, a limiting protrusion 9 is arranged on the outer side of one end of the elastic pin 4, 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 members 1; a plurality of expansion and contraction gaps 10 are opened at positions corresponding to the limiting protrusions 9 on the elastic pin 4, and the expansion and contraction gaps 10 are used to allow the limiting protrusions 9 to pass through the friction plate 2 by contraction.

[0021] When connecting the two torque transmission parts 1, the friction plate 2 is placed on a working surface with a slot 5, and 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, and then the two torque transmission parts 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 produces elastic deformation, and the limiting protrusion 9 shrinks and passes through the friction plate 2, so that the two sides of the friction plate 2 are tightly fitted with the working surfaces of the two torque transmission parts 1 respectively.

[0022] By providing a limiting protrusion 9 on the outer side of the elastic pin 4, when the friction plate 2 is pre-positioned, the limiting protrusion 9 can press the friction plate 2 against the working surface of the torque transmission member 1 to avoid position deviation.

[0023] Specifically, in order to facilitate the elastic pin 4 to pass through the friction plate 2, a through hole 12 is opened on the friction plate 2, and the diameter of the through hole 12 is adapted to the outer diameter of the elastic pin 4. By opening the through hole 12 on the friction plate 2, it is possible to avoid deformation of the friction plate 2 when the elastic pin 4 passes through the friction plate 2, thereby preventing particles on the surface of the friction plate 2 from falling off, thereby 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.

[0024] In order to prevent the elastic pin 4 from deforming and losing the positioning effect on the friction plate 2 after the two torque transmission parts 1 are combined, 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 larger than the outer diameter of the limiting protrusion 9. When the elastic pin 4 is elastically deformed to allow the limiting protrusion 9 to pass through the friction plate 2, the limiting protrusion 9 enters the first step 6, and the elastic pin 4 is reset and limits the friction plate 2.

[0025] Specifically, the depth of the slot 5 is greater than the length of the elastic pin 4. The outer diameter of the elastic pin 4 is slightly greater than the diameter of the second step 7, so that the elastic pin 4 is always in a slightly contracted state, preventing the elastic pin 4 from sliding when no external force is applied.

[0026] In some embodiments, bolt holes 8 are provided at corresponding positions of the torque transmission member 1 and the friction plate 2 , and the two torque transmission members 1 are fixed by fastening bolts 3 .

[0027] In order to meet the expansion and contraction requirements of the elastic pin 4, in some embodiments, a slot 11 is opened on one side of the elastic pin 4 along its axial direction. Under the action of the slot 11, the elastic pin is ensured to shrink as a whole so that it can be fixed in the slot 5. The expansion and contraction seam 10 is opened along the axial direction of the elastic pin 4, and multiple expansion and contraction seams 10 are evenly distributed.

[0028] In order 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 by the torque transmission member 1 to slide into the slot 5, the elastic pin 4 is more likely to deform and shrink under the action of the arc transition surface.

[0029] A friction plate fixing method specifically includes the following steps: A stepped slot 5 is provided on the transmission surface of one of the torque transmission members 1, the diameter of the first step 6 is larger than the outer diameter of the limiting protrusion 9, the diameter of the second step 7 is adapted to the diameter of the elastic pin 4, and a through hole 12 adapted to the diameter of the elastic pin 4 is provided at a position corresponding to the friction plate 2 and the slot 5; The end of the elastic pin 4 without the limiting protrusion 9 is passed through the through hole 12 through the friction plate 2 and inserted into the slot 5, and the friction plate 2 is positioned by the limiting protrusion 9. At this time, one end of the elastic pin 4 is inserted into the second step 7 of the slot 5, and it is elastically deformed and fits on the wall of the second step 7, and its elastic force is used to maintain a stable connection state; Align and connect the two torque transmission members 1, and the transmission surface of the other torque transmission member 1 pushes the elastic pin 4 to shrink the limiting protrusion 9 and pass through the friction plate 2, so that the protruding end of the elastic pin 4 is flush with the surface of the friction plate 2; Then the two torque transmission parts 1 are connected and fixed by fastening bolts 3 .

[0030] The torque transmission member 1 shown in the attached figure is only a schematic diagram for explaining the principle of the present invention, and is intended to intuitively express the present invention. At the same time, the fixing structure and the fixing method used in the present invention are not limited to the application of the friction plate 2, but also have a wide range of applicability, and can be flexibly applied to the positioning and fixing requirements of similar thin plates or other applicable objects.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A friction plate fixing structure, comprising a torque transmission member (1), a friction plate (2) being arranged between the working surfaces of two torque transmission members (1), characterized in that: It also includes an elastic pin (4), one end of which is provided with a limiting protrusion (9) on the outside, 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 parts (1); A plurality of expansion and contraction slits (10) are provided on the elastic pin (4) at positions corresponding to the limiting protrusions (9), and the expansion and contraction slits (10) are used to allow the limiting protrusions (9) to pass through the friction plate (2) by contraction.

2. A friction plate fixing structure according to claim 1, characterized in that: The friction plate (2) is provided with a through hole (12), the diameter of the through hole (12) is matched to the outer diameter of the elastic pin (4), and the outer diameter of the limiting protrusion (9) is larger than the diameter of the through hole (12).

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

4. A friction plate fixing 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 plate fixing structure according to claim 1, characterized in that: Bolt holes (8) are provided at corresponding positions of the torque transmission member (1) and the friction plate (2), and the two torque transmission members (1) are fixed by fastening bolts (3).

6. The friction plate fixing structure according to claim 1, characterized in that: A notch (11) is provided on one side of the elastic pin (4) along its axial direction, and the expansion and contraction seam (10) is provided along the axial direction of the elastic pin (4).

7. The friction plate fixing structure according to claim 1, characterized in that: The limiting protrusion (9) is annular in shape, and there is an arc-shaped smooth transition between the limiting protrusion (9) and the elastic pin (4).

8. A friction plate fixing method, characterized in that: The following steps are involved: S1, a slot (5) is provided on a transmission surface of one of the torque transmission members (1), and a through hole (12) is provided at a position of the friction plate (2) corresponding to the slot (5); S2, passing the end of the elastic pin (4) without the limiting protrusion (9) through the through hole (12), through the friction plate (2) and into the slot (5), so that the friction plate (2) is positioned by the limiting protrusion (9); S3, connecting the two torque transmission members (1), the transmission surface of the other torque transmission member (1) pushes the elastic pin (4) to cause the limiting protrusion (9) to retract and pass through the friction plate (2); S4. Connect and fix the two torque transmission parts (1).

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