Retention device for processing fork shoulder of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicle production and processing, in particular to a retention device for processing an electric vehicle fork shoulder, which comprises a base, a first retention mechanism and a second retention mechanism, the first retention mechanism comprises a first pressing component and a positioning component, the positioning component comprises two groups of positioning components, and the first pressing component and the second pressing component are arranged on the base. Each positioning component comprises a conical positioning pin, a sleeve and an elastic connecting part, and the elastic connecting part is arranged in the sleeve. The two damping mounting holes of the fork shoulder with the upward front face correspond to the two conical positioning pins in a one-to-one mode, the fork shoulder is put down, the conical positioning pins are correspondingly inserted into the damping mounting holes, the damping mounting holes to be machined are selected as the main positioning reference, and the fixing mode that fixing is conducted through the shape of the fork shoulder is omitted; as the diameter of one end, far away from the elastic connecting part, of the conical positioning pin is smaller than that of the other end, the device can be suitable for the diameters of damping mounting holes in a certain range, and the positioning precision is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of production and processing of electric vehicles, in particular to a retaining device for processing a fork shoulder of an electric vehicle. Background Art

[0002] The main body of an electric bicycle consists of many components, among which the front fork assembly for installing the front wheel of the electric bicycle is the main structural body that bears the impact force of the front end of the electric bicycle. The fork crown of the front fork assembly and the fork crown body generally adopt a casting structure. They are the main connecting parts of the shock absorber and the handlebar steering tube in the front fork assembly. In order to meet the installation requirements of the handlebar steering tube and shock absorber, it is necessary to process the two shock absorber mounting holes, one steering tube mounting hole and the three reference surfaces of the fork crown. The fork crown processing is divided into two processes. In the first process, the three reference surfaces of the fork crown facing up are processed and the shock absorber mounting hole is processed for the first time. In the second process, the steering tube mounting hole and the shock absorber mounting hole are processed for the reverse side of the fork crown.

[0003] Currently, the retaining device structure used in the fork crown processing in the first and second processes is the same, such as Figure 8 As shown, the retaining device includes a base and multiple groups of corner clamping cylinder structures. The base is provided with a limiting groove for limiting the fork shoulder and a clearance hole connected to the limiting groove for making way for the two raised columns on the fork shoulder. Each group of corner clamping cylinder structures is used to press the fork shoulder so that the fork shoulder is completely fixed in the limiting groove.

[0004] However, in the above method, the shape and size of the limit groove are fixed, and the fork crown is a casting. There will be a certain error in the size of the fork crown after casting. When the fork crown as a whole is larger than the standard part, it cannot be processed. When it is smaller, the fork crown is easily offset in the limit groove, which in turn causes deviations in the processing positions of the shock absorber mounting hole and the steering tube mounting hole, poor positioning accuracy, and a high scrap rate for the processed fork crown. Utility Model Content

[0005] (1) The problem to be solved by the present invention is: how to accurately position and process the fork shoulder when the casting size deviates.

[0006] (2) Technical solution

[0007] The utility model provides a retaining device for processing an electric vehicle fork crown, comprising a base, a first retaining mechanism and a second retaining mechanism, wherein the first retaining mechanism comprises a first pressing assembly and a positioning assembly;

[0008] The positioning assembly includes two groups of positioning members, each group of positioning members includes a tapered positioning pin, a sleeve and an elastic connecting component, the elastic connecting component is arranged in the sleeve, and the tapered positioning pin is mounted on the elastic connecting component so that the tapered positioning pin can move along its axis;

[0009] The diameter of the tapered positioning pin at one end away from the elastic connecting component is smaller than the diameter of the other end;

[0010] The first pressing assembly is used to press the fork shoulder facing upward onto the upper surface of the sleeve;

[0011] The first pressing assembly and the sleeve are both mounted on the base;

[0012] The second retaining mechanism has the same structure as the first retaining mechanism, and is used to retain the fork shoulder with its reverse side facing upward.

[0013] According to one embodiment of the present invention, the first retaining mechanism further includes a second pressing assembly, and the positioning assembly is located between the first pressing assembly and the second pressing assembly.

[0014] According to one embodiment of the present invention, the first pressing assembly includes two first pressing members;

[0015] The first pressing member includes a first cylinder, a first pressing rod and a first connecting rod;

[0016] The fixed end of the first cylinder is fixedly connected to the base, and the pushing end thereof is rotatably connected to the first pressure rod. The first pressure rod is rotatably connected to one end of the first connecting rod, and the other end of the first connecting rod is hinged to the fixed end of the first cylinder.

[0017] According to one embodiment of the present invention, the elastic connecting component includes a spring, a first cylinder and a second cylinder;

[0018] One end of the first cylinder is fixedly connected to the tapered positioning pin, and the other end thereof is fixedly connected to one end of the second cylinder, and the other end of the second cylinder is connected to the bottom wall of the sleeve via the spring;

[0019] Along the axis of the sleeve, a circular hole and a circular groove are formed in the sleeve, the side wall of the circular hole is in contact with the side wall of the first cylinder, and the side wall of the circular groove is in contact with the side wall of the second cylinder. The diameter of the first cylinder is smaller than the diameter of the second cylinder.

[0020] The length direction of the spring, the axial direction of the tapered positioning pin, and the axial direction of the first cylinder are the same.

[0021] According to one embodiment of the present invention, a third retaining mechanism is provided between the first pressing assembly and the second pressing assembly;

[0022] The third retaining mechanism includes a plurality of third pressing assemblies and a plurality of fourth pressing assemblies arranged in an interlaced manner;

[0023] A set of positioning components is provided between each adjacent third pressing component and fourth pressing component;

[0024] A group of positioning components is provided between the first pressing component and the third pressing component adjacent thereto;

[0025] A group of positioning components is provided between the second pressing component and the fourth pressing component adjacent thereto.

[0026] According to one embodiment of the present invention, the third pressing assembly includes two second pressing members, each of which includes a second cylinder, two second pressing rods and two second connecting rods;

[0027] The fixed end of the second cylinder is fixedly connected to the base, and the ends of the two second pressure rods close to each other are both rotatably connected to the pushing end of the second cylinder;

[0028] The second pressure rod and the second connecting rod have a one-to-one correspondence, the second pressure rod is rotatably connected to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the fixed end of the second cylinder;

[0029] The two second connecting rods are respectively located on both sides of the second cylinder.

[0030] According to one embodiment of the present invention, a shaft hole is formed at the pushing end of the second cylinder, a first circular shaft is fixedly connected to the shaft hole, and the ends of the two second pressure rods close to each other are rotatably connected to the two ends of the first circular shaft respectively;

[0031] The axial direction of the first circular shaft is perpendicular to the length direction of the second compression rod.

[0032] According to one embodiment of the present invention, a support assembly for supporting the fork shoulder is provided on the base.

[0033] According to an embodiment of the present invention, the support assembly includes a support column, a positioning groove is provided on the base, the support column is embedded in the positioning groove, and the upper surface of the support column is parallel to the upper surface of the sleeve.

[0034] According to an embodiment of the present invention, the first pressing assembly is fixedly connected to the base via a first pad, and the second pressing assembly is fixedly connected to the base via a second pad.

[0035] Beneficial effects of the utility model:

[0036] Match the two shock-absorbing mounting holes of the fork shoulder facing upward with the two tapered locating pins one by one, lower the fork shoulder so that the tapered locating pins are inserted into the shock-absorbing mounting holes accordingly, select the shock-absorbing mounting holes to be processed as the main positioning reference, and cancel the retention method of retaining by the fork shoulder shape. Since the diameter of the tapered locating pin at one end away from the elastic connecting component is smaller than the diameter at the other end, it can be applied to a certain range of shock-absorbing mounting hole diameters. Therefore, even if the size of the shock-absorbing mounting hole has an error due to the casting of the fork shoulder, the fork shoulder can be accurately positioned on the tapered locating pin, and the positioning accuracy is higher. After positioning, the fork shoulder is pressed down by the first clamping component. Since the tapered locating pin is installed in the elastic The fork crown is placed on the flexible connecting component, so the fork crown is pressed down at the same time until the reference positioning surface of the fork crown abuts against the upper surface of the sleeve and then stops to fix the fork crown. At this time, the height of the fork crown relative to the base is unchanged, which is convenient for processing in the first step. After the processing is completed, the processed fork crown is placed with the reverse side upward on the second step, and the second retaining mechanism retains it and then processes it. Since the second retaining mechanism has the same structure as the first retaining mechanism, the positioning accuracy of the fork crown can still be guaranteed when the fork crown is processed in the second step, so that the fork crown will not be offset in position, and the processing position accuracy of the shock absorber mounting hole and the steering tube mounting hole is higher, thereby reducing the scrap rate of the fork crown. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A first stereoscopic view of the retaining device provided in Example 1 of the present utility model;

[0039] Figure 2 A second perspective view of the retaining device provided in Example 1 of the present utility model;

[0040] Figure 3 A schematic diagram of the retaining device provided in the first embodiment of the present invention pressing the fork crown;

[0041] Figure 4 A three-dimensional diagram of the retaining device provided in Example 2 of the present utility model;

[0042] Figure 5 A schematic diagram of the retaining device provided in the second embodiment of the present invention pressing the fork crown;

[0043] Figure 6 The second embodiment of the present invention provides Figure 4 Enlarged view of part A;

[0044] Figure 7 A cross-sectional view of a positioning assembly provided in Example 1 of the present utility model;

[0045] Figure 8 It is a three-dimensional diagram of a retaining device in the prior art.

[0046] Icons: 1. Base; 2. First clamping assembly; 201. First cylinder; 202. First pressure rod; 203. First connecting rod; 3. Positioning assembly; 301. Conical positioning pin; 302. Sleeve; 303. Spring; 304. First cylinder; 305. Second cylinder; 4. Support assembly; 5. Second clamping assembly; 6. Third clamping assembly; 601. Second cylinder; 602. Second pressure rod; 603. Second connecting rod; 7. Fourth clamping assembly; 8. Second retaining mechanism; 9. Second pad. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] Example 1:

[0049] like Figure 1-Figure 3 As shown, one embodiment of the present invention provides a retaining device for processing an electric vehicle fork shoulder, comprising a base 1, a first retaining mechanism and a second retaining mechanism 8, wherein the first retaining mechanism comprises a first pressing assembly 2 and a positioning assembly 3;

[0050] The positioning assembly 3 includes two sets of positioning components, each set of positioning components includes a tapered positioning pin 301, a sleeve 302 and an elastic connecting component. The sleeve 302 is provided with an elastic connecting component, and the tapered positioning pin 301 is mounted on the elastic connecting component so that the tapered positioning pin 301 can move along its axis.

[0051] The diameter of the tapered positioning pin 301 at one end away from the elastic connecting component is smaller than the diameter of the other end;

[0052] The first pressing assembly 2 is used to press the fork shoulder facing upward onto the upper surface of the sleeve 302;

[0053] The first pressing assembly 2 and the sleeve 302 are both mounted on the base 1;

[0054] The second retaining mechanism 8 has the same structure as the first retaining mechanism, and is used to retain the fork shoulder with the reverse side facing upward.

[0055] The two shock-absorbing mounting holes of the fork shoulder facing upward are matched with the two tapered locating pins 301 one by one, and the fork shoulder is lowered so that the tapered locating pins 301 are inserted into the shock-absorbing mounting holes accordingly. The shock-absorbing mounting holes to be processed are selected as the main positioning reference, and the retention method of retaining by the fork shoulder shape is eliminated. Since the diameter of the tapered locating pin 301 at one end away from the elastic connecting component is smaller than the diameter at the other end, it can be applied to a certain range of shock-absorbing mounting hole diameters. Therefore, even if the size of the shock-absorbing mounting hole has an error due to the casting of the fork shoulder, the fork shoulder can be accurately positioned on the tapered locating pin 301, and the positioning accuracy is higher. After positioning, the fork shoulder is pressed downward by the first clamping component 2. Since the tapered locating pin 30 1 is installed on the elastic connecting component, so the fork crown is pressed down at the same time until the reference positioning surface of the fork crown abuts against the upper surface of the sleeve 302 and then stops, fixing the fork crown in place. At this time, the height of the fork crown relative to the base 1 is unchanged, which is convenient for processing in the first step. After processing is completed, the processed fork crown is placed with the reverse side upward on the second step, and is fixed by the second fixing mechanism 8 before processing. Since the second fixing mechanism 8 has the same structure as the first fixing mechanism, the positioning accuracy of the fork crown can still be guaranteed when the fork crown is processed in the second step, so that the fork crown will not be offset in position, thereby improving the processing position accuracy of the shock absorber mounting hole and the steering tube mounting hole, and reducing the scrap rate of the fork crown.

[0056] like Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, the first retaining mechanism further includes a second pressing assembly 5 , and the positioning assembly 3 is located between the first pressing assembly 2 and the second pressing assembly 5 .

[0057] By providing the second pressing assembly 5 , both sides of the fork shoulder can be pressed, the pressure distribution is more uniform, and the fork shoulder can be better fixed.

[0058] According to one embodiment of the present invention, the first pressing assembly 2 includes two first pressing members;

[0059] The first pressing member includes a first cylinder 201, a first pressing rod 202 and a first connecting rod 203;

[0060] The fixed end of the first cylinder 201 is fixedly connected to the base 1 , and its pushing end is rotatably connected to the first pressure rod 202 . The first pressure rod 202 is rotatably connected to one end of the first connecting rod 203 , and the other end of the first connecting rod 203 is hinged to the fixed end of the first cylinder 201 .

[0061] It should be noted that the two ends of the first connecting rod 203 are rotatably connected to the first connecting shaft and the second connecting shaft respectively, the fixed end of the first cylinder 201 is fixedly connected to the convex mounting block, the side wall of the convex mounting block is fixedly connected to the first connecting shaft, and a gap is left between the first connecting shaft and the bottom wall of the mounting block, so that the first connecting rod 203 can rotate around the axis of the first connecting shaft.

[0062] The second connecting shaft is fixedly connected to the first compression rod 202, and the first compression rod 202 is rotatably connected to the push end of the first cylinder 201 via the third connecting shaft. The axial direction of the first connecting shaft is parallel to the axial directions of the second connecting shaft and the axial direction of the third connecting shaft, and the axial direction of the first connecting shaft is perpendicular to the extension and contraction direction of the first cylinder 201.

[0063] When the first cylinder 201 rises, the second connecting shaft rotates around the axis of the first connecting shaft. Under the dual action of the first cylinder 201 and the first connecting rod 203, the first pressure rod 202 rotates around the axis of the second connecting shaft. The end of the first pressure rod 202 away from the first cylinder 201 presses down to tighten the fork shoulder. Conversely, when the first cylinder 201 descends, the end of the first pressure rod 202 away from the first cylinder 201 tilts up to loosen the fork shoulder, and the tilted height of the first pressure rod 202 is sufficient for taking and placing the fork shoulder.

[0064] The second clamping assembly 5 has the same structure as the first clamping assembly 2, and both include two first clamping members. Because the fork shoulder is a special-shaped structure, there are two raised columns and two planar raised portions on the front of the fork shoulder. The two first clamping members in the first clamping assembly 2 need to avoid the raised columns and the steering tube mounting holes, and the two first clamping members in the second clamping assembly 5 need to avoid the two shock absorber mounting holes and need to be pressed on the planar raised portions to ensure the clamping effect. Therefore, the distance between the two first clamping members in the first clamping assembly 2 is greater than the distance between the two first clamping members in the second clamping assembly 5.

[0065] By setting up the first clamping assembly 2 and the second clamping assembly 5, multiple first cylinders 201 drive the corresponding first compression rods 202 to perform compression, thereby fixing the four positions of the fork shoulder, dispersing the force points of the fork shoulder, and making the fork shoulder receive uniform compression force, so that it can be better fixed on the sleeve 302.

[0066] According to one embodiment of the present invention, Figure 7 As shown, the elastic connecting component includes a spring 303, a first cylinder 304 and a second cylinder 305;

[0067] One end of the first cylinder 304 is fixedly connected to the tapered positioning pin 301, and the other end thereof is fixedly connected to one end of the second cylinder 305. The other end of the second cylinder 305 is connected to the bottom wall of the sleeve 302 via the spring 303.

[0068] Along the axis of the sleeve 302, a circular hole and a circular groove are formed in the sleeve 302. The sidewall of the circular hole fits with the sidewall of the first cylinder 304, and the sidewall of the circular groove fits with the sidewall of the second cylinder 305. The diameter of the first cylinder 304 is smaller than the diameter of the second cylinder 305.

[0069] The length direction of the spring 303 , the axial direction of the tapered positioning pin 301 , and the axial direction of the first cylinder 304 are the same.

[0070] Preferably, the first cylinder 304 , the second cylinder 305 and the tapered positioning pin 301 are integrally formed.

[0071] The diameter of the second cylinder 305 is larger than the diameter of the circular hole, and can limit the movement stroke of the tapered positioning pin 301.

[0072] By setting the second cylinder 305 and the first cylinder 304, the conical locating pin 301 can move only along its axial direction. When the spring 303 is subjected to the pressure when the fork shoulder is placed or the downward pressure of the first clamping assembly 2, the spring 303 contracts and the conical locating pin 301 moves toward the base 1 until the reference positioning surface of the fork shoulder abuts against the upper surface of the sleeve 302.

[0073] Compared with the positioning structure of the positioning pin and the guide positioning column as a whole, the positioning assembly 3 in this embodiment has a real-time positioning function, and can achieve the positioning function even if the inner diameter of the fork shoulder increases or decreases.

[0074] A circular groove is provided at one end of the sleeve 302 close to the base 1 , and a mounting groove adapted to the sleeve 302 is provided on the base 1 , so that the position of the sleeve 302 can be accurately positioned. The sleeve 302 is screwed to the base 1 by bolts.

[0075] Furthermore, the end of the first pressure rod 202 away from the first cylinder 201 is arc-shaped. Since the contact position of the fork shoulder surface is irregular, the first pressure rod 202 with an arc-shaped end is used to ensure its compression effect without causing scratches on the fork shoulder surface.

[0076] Of course, in this embodiment, the first clamping assembly 2 can also be in other forms. For example, the first clamping assembly 2 includes an electric push rod, the fixed end of the electric push rod is mounted on the base 1, and the pushing end of the electric push rod is fixedly connected to the pressure plate. The electric push rod is extended and retracted, thereby driving the pressure plate to move up and down, thereby loosening or tightening the fork shoulder. Such a configuration does not deviate from the design concept of the present invention and, therefore, should fall within the scope of protection of the present invention.

[0077] According to one embodiment of the present invention, a support assembly 4 for supporting the fork crown is provided on the base 1 .

[0078] According to an embodiment of the present invention, the support assembly 4 includes a support column. A positioning groove is provided on the base 1 . The support column is embedded in the positioning groove. The upper surface of the support column is parallel to the upper surface of the sleeve 302 .

[0079] By setting up the support component 4, the fork shoulder can be provided with auxiliary support and positioning. When the reference positioning surface at the fork shoulder shock-absorbing mounting hole abuts against the upper surface of the sleeve 302, the top plane of the fork shoulder just abuts against the support column, so that the three positions of the fork shoulder can all be supported, less likely to deviate, and the stability effect is better.

[0080] The first retaining mechanism and the second retaining mechanism 8 are each provided with a support column. Since the distances from the top plane of the fork shoulder to the base 1 are different when the fork shoulder faces upward and when the fork shoulder faces upward, the length of the support column in the first retaining mechanism is greater than that of the support column in the second retaining mechanism 8.

[0081] According to an embodiment of the present invention, the first pressing assembly 2 is fixedly connected to the base 1 via a first pad, and the second pressing assembly 5 is fixedly connected to the base 1 via a second pad 9 .

[0082] It should be noted that if Figure 1 As shown, when the fork shoulder is placed with the front side facing upward, the distance from the position where the second clamping assembly 5 contacts the fork shoulder to the base 1 is greater than the distance from the position where the first clamping assembly 2 contacts the fork shoulder to the base 1. At this time, the thickness of the second pad 9 can be set to be greater than the thickness of the first pad, so that the second clamping assembly 5 has a better clamping effect when clamping the fork shoulder.

[0083] Example 2:

[0084] like Figure 4-Figure 6 As shown, a third retaining mechanism is provided between the first pressing assembly 2 and the second pressing assembly 5;

[0085] The third retaining mechanism includes a plurality of third pressing assemblies 6 and a plurality of fourth pressing assemblies 7 that are staggered.

[0086] A set of positioning components 3 is provided between each adjacent third pressing component 6 and fourth pressing component 7;

[0087] A set of positioning components 3 is provided between the first pressing component 2 and the third pressing component 6 adjacent thereto;

[0088] A group of positioning components 3 is provided between the second pressing component 5 and the fourth pressing component 7 adjacent thereto.

[0089] By providing the third clamping assembly 6 and the fourth clamping assembly 7 , it is possible to implement a method of simultaneously retaining multiple fork shoulders in a single process on a CNC machine tool according to the size of the machine tool base 1 , thereby achieving higher retention efficiency.

[0090] In this embodiment, since the contact positions of the first clamping assembly 2 and the fourth clamping assembly 7 with each fork shoulder when they clamp the fork shoulder are the same, and the contact positions of the second clamping assembly 5 and the third clamping assembly 6 with each fork shoulder are the same, the third clamping assembly 6 can only be adjacent to the first clamping assembly 2 or the fourth clamping assembly 7, and the fourth clamping assembly 7 can only be adjacent to the second clamping assembly 5 or the third clamping assembly 6.

[0091] Preferably, Figure 4 As shown, when the third pressing assembly 6 and the fourth pressing assembly 7 are arranged in sequence and the number of the third pressing assembly 6 is the same as the number of the fourth pressing assembly 7, as shown in FIG. Figure 3 As shown, the two ends of the base 1 are a first pressing component 2 and a second pressing component 5;

[0092] Optional, such as Figure 4 As shown, when the third clamping assembly 6 and the fourth clamping assembly 7 are arranged in sequence at intervals, and the number of the third clamping assembly 6 is one more than the number of the fourth clamping assembly 7, there are two first clamping assemblies 2 located at both ends of the length direction of the base 1, and the second clamping assembly 5 is no longer set.

[0093] According to one embodiment of the present invention, Figure 6 As shown, the third pressing assembly 6 includes two second pressing members, each of which includes a second cylinder 601, two second pressing rods 602 and two second connecting rods 603;

[0094] The fixed end of the second cylinder 601 is fixedly connected to the base 1, and the ends of the two second pressure rods 602 close to each other are both rotatably connected to the pushing end of the second cylinder 601;

[0095] The second pressure rod 602 and the second connecting rod 603 correspond to each other one by one. The second pressure rod 602 is rotatably connected to one end of the second connecting rod 603, and the other end of the second connecting rod 603 is hinged to the fixed end of the second cylinder 601;

[0096] The two second connecting rods 603 are respectively located on both sides of the second cylinder 601 .

[0097] According to one embodiment of the present invention, a shaft hole is formed at the pushing end of the second cylinder 601, a first circular shaft is fixedly connected to the shaft hole, and the ends of the two second pressure rods 602 close to each other are rotatably connected to the two ends of the first circular shaft respectively;

[0098] The axial direction of the first circular axis is perpendicular to the length direction of the second pressing rod 602 .

[0099] When the second cylinder 601 rises, the two second pressure rods 602 rotate counterclockwise and clockwise around the axis of the first circular shaft respectively, pressing the fork shoulders on both sides of the second cylinder 601, so that a third pressing component 6 can simultaneously press and fix the two fork shoulders, effectively improving processing efficiency and reducing the time for intermediate pauses to replace fork shoulders.

[0100] It should be noted that the fourth clamping assembly 7 has the same structure as the third clamping assembly 6, because the third clamping assembly 6 and the second clamping assembly 5 are pressed on the fork shoulder at the same position, and the fourth clamping assembly 7 and the first clamping assembly 2 are pressed on the fork shoulder at the same position. Therefore, the spacing between the two second clamping components in the fourth clamping assembly 7 is the same as the spacing between the two first clamping components in the first clamping assembly 2, and the spacing between the two second clamping components in the third clamping assembly 6 is the same as the spacing between the two first clamping components in the second clamping assembly 5.

[0101] Furthermore, because the structure of the second retaining mechanism 8 is identical to that of the first retaining mechanism, the fork shoulder lacks the two planar protrusions and two protruding posts when the fork shoulder faces upward. Therefore, the spacing between the two first pressing members of the first and second pressing assemblies 2 and 5 in the second retaining mechanism 8 is identical, as is the spacing between the two second pressing members of the third and fourth pressing assemblies 6 and 7. The thickness of the first backing plate in the second retaining mechanism 8 is identical to the thickness of the second backing plate 9.

[0102] The diameter of the unmachined shock absorber mounting hole is approximately 22mm, and the diameter of the steering tube mounting hole is approximately 23mm. When the fork crown is facing up, the surface in contact with the top surface of the sleeve 302 serves as the reference positioning surface. When the fork crown is facing up, the surface in contact with the top surface of the sleeve 302 serves as the shock absorber mounting reference plane.

[0103] Specifically, the first process is to process two shock-absorbing mounting reference planes, a top plane and a shock-absorbing mounting hole with a diameter of 24 and a depth of 5mm. Since the tapered locating pin 301 is a tapered structure, and the taper of the tapered locating pin 301 set in the first process is higher than the taper of the tapered locating pin 301 set in the second process, the inner wall of the shock-absorbing mounting hole of the blank of the fork shoulder can be effectively positioned without shaking. The diameter of the first cylinder 304 is larger than the inner diameter of the shock-absorbing mounting hole of the blank, which can make the fork shoulder stuck on the tapered inclined surface of the tapered locating pin 301. The length of the tapered locating pin 301 is 4mm, and the support column is used to ensure the stability of the fork shoulder after placement. In the process of gradually tightening the first pressure rod 202 and the second pressure rod 602 under the joint action of the first cylinder 201 and the second cylinder 601, the spring 303 is compressed and the fork shoulder moves downward. While compressing the spring 303, it can ensure that the tapered locating pin 301 continues to position the fork shoulder until the reference positioning surface of the fork shoulder contacts the upper surface of the sleeve 302 and is completely tightened by the first pressure rod 202 or the second pressure rod 602. In addition, each fork shoulder has four clamping positions, which can evenly distribute the clamping force on multiple points of the workpiece, so that the workpiece is evenly stressed, fits more closely with the guide positioning column and the auxiliary positioning platform, and is fixed more firmly.

[0104] The second process is to process two shock absorber mounting holes with a diameter of 27 and a depth of 32mm, and to process a steering tube mounting hole with a diameter of φ25. The positioning and clamping methods of this process are exactly the same as those of the first process, except that the holes processed in this process are used for assembling shock absorbers and steering tubes, and the precision requirements are higher. The locating pin recess cannot be exposed from the 24mm diameter plane (the depth of the 24mm diameter plane is 5mm, so the length of the tapered locating pin 301 needs to be less than 5mm, preferably 4mm); and the tapered locating pin 301 uses the circular surface of diameter 24 that has been processed in the first process as the positioning surface, with higher precision and smaller error, and in the second process, the two sleeves 302 and the support column are in contact with the shock absorber hole mounting reference surface and the top plane that have been processed and formed in the first process, which has the effect of improving positioning accuracy and reducing processing errors.

[0105] In the description of this utility model, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0106] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A retaining device for processing an electric vehicle fork crown, characterized in that: It comprises a base (1), a first retaining mechanism and a second retaining mechanism (8), wherein the first retaining mechanism comprises a first pressing assembly (2) and a positioning assembly (3); The positioning assembly (3) comprises two groups of positioning components, each group of positioning components comprises a tapered positioning pin (301), a sleeve (302) and an elastic connecting component, the sleeve (302) is provided with the elastic connecting component, and the tapered positioning pin (301) is mounted on the elastic connecting component so that the tapered positioning pin (301) can move along its axial direction; The diameter of the tapered positioning pin (301) at one end away from the elastic connecting component is smaller than the diameter of the other end; The first pressing assembly (2) is used to press the fork shoulder facing upward onto the upper surface of the sleeve (302); The first pressing assembly (2) and the sleeve (302) are both mounted on the base (1); The second retaining mechanism (8) has the same structure as the first retaining mechanism, and the second retaining mechanism (8) is used to retain the fork shoulder with the reverse side facing upward.

2. The retaining device for machining an electric vehicle fork crown according to claim 1, characterized in that: The first retaining mechanism further comprises a second pressing assembly (5), and the positioning assembly (3) is located between the first pressing assembly (2) and the second pressing assembly (5).

3. The retaining device for machining an electric vehicle fork crown according to claim 2, characterized in that: The first pressing assembly (2) comprises two first pressing members; The first pressing member includes a first cylinder (201), a first pressing rod (202) and a first connecting rod (203); The fixed end of the first cylinder (201) is fixedly connected to the base (1), and the pushing end thereof is rotatably connected to the first pressure rod (202). The first pressure rod (202) is rotatably connected to one end of the first connecting rod (203), and the other end of the first connecting rod (203) is hinged to the fixed end of the first cylinder (201).

4. The retaining device for machining an electric vehicle fork crown according to claim 1, characterized in that: The elastic connecting component includes a spring (303), a first cylinder (304) and a second cylinder (305); One end of the first cylinder (304) is fixedly connected to the tapered positioning pin (301), and the other end thereof is fixedly connected to one end of the second cylinder (305), and the other end of the second cylinder (305) is connected to the bottom wall of the sleeve (302) via the spring (303); Along the axis of the sleeve (302), a circular hole and a circular groove are provided in the sleeve (302), the side wall of the circular hole is in contact with the side wall of the first cylinder (304), and the side wall of the circular groove is in contact with the side wall of the second cylinder (305), and the diameter of the first cylinder (304) is smaller than the diameter of the second cylinder (305); The length direction of the spring (303), the axial direction of the tapered positioning pin (301), and the axial direction of the first cylinder (304) are the same.

5. The retaining device for machining an electric vehicle fork crown according to claim 2, characterized in that: A third retaining mechanism is provided between the first pressing assembly (2) and the second pressing assembly (5); The third retaining mechanism comprises a plurality of third pressing assemblies (6) and a plurality of fourth pressing assemblies (7) arranged in an interlaced manner; A group of positioning components (3) is provided between each adjacent third pressing component (6) and fourth pressing component (7); A group of positioning components (3) is provided between the first pressing component (2) and the third pressing component (6) adjacent thereto; A group of positioning components (3) is provided between the second pressing component (5) and the fourth pressing component (7) adjacent thereto.

6. The retaining device for machining an electric vehicle fork crown according to claim 5, characterized in that: The third pressing assembly (6) includes two second pressing members, each of which includes a second cylinder (601), two second pressing rods (602) and two second connecting rods (603); The fixed end of the second cylinder (601) is fixedly connected to the base (1), and the ends of the two second pressure rods (602) that are close to each other are both rotatably connected to the pushing end of the second cylinder (601); The second pressure rod (602) and the second connecting rod (603) correspond to each other one by one. The second pressure rod (602) is rotatably connected to one end of the second connecting rod (603), and the other end of the second connecting rod (603) is hinged to the fixed end of the second cylinder (601); The two second connecting rods (603) are respectively located on both sides of the second cylinder (601).

7. The retaining device for machining an electric vehicle fork crown according to claim 6, characterized in that: The pushing end of the second cylinder (601) is provided with an axial hole, a first circular shaft is fixedly connected in the axial hole, and the ends of the two second pressure rods (602) close to each other are rotatably connected to the two ends of the first circular shaft respectively; The axial direction of the first circular axis is perpendicular to the length direction of the second pressure rod (602).

8. The retaining device for machining an electric vehicle fork crown according to claim 1, characterized in that: A support assembly (4) for supporting the fork shoulder is provided on the base (1).

9. The retaining device for machining an electric vehicle fork crown according to claim 8, characterized in that: The support assembly (4) includes a support column. A positioning groove is provided on the base (1). The support column is embedded in the positioning groove. The upper surface of the support column is parallel to the upper surface of the sleeve (302).

10. The retaining device for machining an electric vehicle fork crown according to claim 2, characterized in that: The first pressing assembly (2) is fixedly connected to the base (1) via a first pad, and the second pressing assembly (5) is fixedly connected to the base (1) via a second pad (9).

Images