Bullet train part machining clamp

Abstract

The invention particularly relates to a bullet train part machining clamp, and relates to the technical field of bullet train part machining. The bullet train part machining clamp comprises a base and a limiting assembly. The base comprises a first face used for placing a workpiece. The limiting assembly comprises a mounting part, a fixing ring and a plurality of limiting plate bodies, the mounting part is movably arranged on the base in the first direction, the limiting plate bodies are rotationally connected to the mounting part, the rotating axes of the limiting plate bodies are perpendicular to the first direction, a frustum-shaped structure is defined by the limiting plate bodies, and the axis of the frustum-shaped structure extends in the first direction; the fixing ring is arranged on the peripheral wall of the frustum-shaped structure in a sleeving mode. The workpiece is fixed through the inner space of the frustum-shaped structure defined by the multiple limiting plate bodies, various different types of special-shaped workpieces can be reliably fixed to the first face, and the fixing effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motor vehicle parts processing, and in particular relates to a motor vehicle parts processing fixture. Background Art

[0002] As a transportation equipment that integrates various high-tech technologies, EMUs include a large number of parts, among which there are a lot of special-shaped parts. Traditional clamps are mostly suitable for clamping parts with regular contours. When clamping special-shaped parts, there is a situation where the clamping end and the parts cannot form a reliable contact, resulting in the inability to reliably fix the special-shaped parts, which reduces the product yield and processing quality when processing special-shaped parts. Summary of the invention

[0003] The purpose of the present invention is to provide a motor vehicle parts processing fixture which can reliably fix special-shaped parts.

[0004] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: the embodiment of the present invention provides a motor vehicle parts processing fixture, including a base and a limit assembly. The base includes a first surface, and the first surface is used to place the workpiece. The limit assembly includes a mounting portion, a fixing ring and a plurality of limit plates, the mounting portion is movably arranged on the base along a first direction, the plurality of limit plates are rotatably connected to the mounting portion, the rotation axis of the limit plate is perpendicular to the first direction, the plurality of limit plates form a frustum-shaped structure, the axis of the frustum-shaped structure extends along the first direction, and the fixing ring is sleeved on the outer peripheral wall of the frustum-shaped structure.

[0005] In some embodiments, along the first direction, the mounting portion is disposed on a side of the base away from the first surface, the base is provided with a through hole corresponding to the limiting plate, and the limiting plate passes through the through hole.

[0006] In some embodiments, a limiting groove is provided on the outer wall surface of the limiting plate body, and the limiting groove is used to accommodate the fixing ring.

[0007] In some embodiments, the fixing ring includes a first half ring and a second half ring, and the first half ring and the second half ring are detachably connected.

[0008] In some embodiments, a flexible abutment portion is disposed on the inner wall surface of the limiting plate body, and a side of the flexible abutment portion facing the workpiece is an arc-shaped surface.

[0009] In some embodiments, the motor vehicle parts processing fixture further includes a fixing assembly, which includes an annular slide rail, a sliding part, a telescopic part and a fixing part. The annular slide rail is arranged on the base, the sliding part is slidably connected to the annular slide rail, and the telescopic part is connected to the sliding part. The fixing part is connected to the telescopic end of the telescopic part, and a mounting cavity is arranged on a side of the fixing part away from the telescopic part, and an expansion part is rotatably connected in the mounting cavity, the rotation axis of the expansion part is perpendicular to the first direction, and the mounting cavity is provided with an opening for the expansion part to be rotated out.

[0010] In some embodiments, along a first direction, the annular slide rail includes a first wall, the first wall is located on a side of the annular slide rail close to the first surface, the sliding portion is gapped with the first wall, the first wall includes a second surface facing the sliding portion, the first wall is movably provided with a plurality of limiting portions, the limiting portions protrude from the second surface, and the plurality of limiting portions are arranged along the extension direction of the annular slide rail.

[0011] In some embodiments, a receiving cavity is provided inside the first wall, the receiving cavity is provided with a sliding hole penetrating the second surface, and the limiting portion is passed through the sliding hole.

[0012] In some embodiments, the accommodating cavity extends along the extension direction of the annular slide rail, a plurality of limiting portions are provided corresponding to the slide hole, an elastic cushion layer is accommodated in the accommodating cavity, and a plurality of limiting portions abut against the elastic cushion layer.

[0013] In some embodiments, along the first direction, a flexible protective layer is provided on one side of the elastic cushion layer facing the limiting portion, and the material of the flexible protective layer includes a carbon fiber and nylon 66 composite material.

[0014] The present invention has the following beneficial effects:

[0015] 1. Compared with the traditional clamps, firstly, the motor vehicle parts processing clamp of the embodiment of the present invention fixes the workpiece through the internal space of the frustum-shaped structure surrounded by multiple limiting plates, and can reliably fix various types of special-shaped workpieces on the first surface, thereby improving the fixing effect. Secondly, the traditional clamp usually includes multiple clamping ends, and each clamping end mostly requires a separate driving structure to drive. In the embodiment of the present invention, the process of fixing the workpiece can be achieved by moving the driving mounting part. The structure is simple and reliable, and the manufacturing cost is also lower. In addition, after the fixing ring is removed from the outer peripheral wall of the frustum-shaped structure, the limiting effect of the limiting plate on the workpiece disappears, and the workpiece can be quickly removed from the first surface, thereby improving the processing efficiency of the workpiece.

[0016] 2. The fixing portion and the expansion portion can fix the position of the workpiece perpendicular to the first direction, thereby improving the fixing effect of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the motor vehicle parts processing fixture of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the fixing ring of the present invention;

[0019] Figure 3 for Figure 1 A magnified image of point A;

[0020] Figure 4 for Figure 1 A magnified view of point B;

[0021] Figure 5 It is a schematic diagram of the cooperation between the sliding part and the limiting part of the present invention.

[0022] Figure numbers: 1-base, 2-installing part, 3-limiting plate, 4-fixing ring, 5-through hole, 6-limiting groove, 7-flexible abutting part, 8-annular slide rail, 9-sliding part, 10-telescopic part, 11-fixing part, 12-installing cavity, 13-expansion part, 14-first wall, 15-elastic cushion layer, 16-limiting part, 17-first half ring, 18-second half ring, 19-workpiece, 20-first surface, 21-second surface. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] See also Figure 1 An embodiment of the present invention provides a machining fixture for motor vehicle parts, including a base 1 and a limit assembly. The base 1 includes a first surface 20, and the first surface 20 is used to place a workpiece 19. The limit assembly includes a mounting portion 2, a fixing ring 4 and a plurality of limit plates 3. The mounting portion 2 is movably arranged on the base 1 along a first direction, and the plurality of limit plates 3 are rotatably connected to the mounting portion 2. The rotation axis of the limit plate 3 is perpendicular to the first direction. The plurality of limit plates 3 form a frustum-shaped structure, and the axis of the frustum-shaped structure extends along the first direction. The fixing ring 4 is sleeved on the outer peripheral wall of the frustum-shaped structure.

[0026] The motor vehicle component processing fixture of the embodiment of the present invention can be used to clamp the components when processing special-shaped components of the motor vehicle, so as to facilitate processing by processing equipment.

[0027] The workpiece 19 may be placed directly on the first surface 20 , or the first surface 20 may be provided with other components for fixing the workpiece 19 .

[0028] The first direction may be the direction shown by the Z axis in the figure, or the first direction may be the vertical direction.

[0029] The mounting portion 2 is used for integrated mounting of the limiting plate bodies 3 so that a plurality of limiting plate bodies 3 can form a frustum-shaped structure.

[0030] A guide rail extending along a first direction may be provided on the base 1 , and the mounting portion 2 is slidably connected to the guide rail, so that the mounting portion 2 can move relative to the base 1 .

[0031] The base 1 may also be provided with a cylinder or a hydraulic cylinder, the telescopic end of which is connected to the mounting portion 2 for driving the mounting portion 2 to move.

[0032] The larger diameter side of the frustum-shaped structure formed by the plurality of limiting plate bodies 3 is close to the first surface 20 , and the smaller diameter side is away from the first surface 20 .

[0033] The fixing ring 4 is used to limit the plurality of limiting plate bodies 3 . By sleeve-mounting the fixing ring 4 on the outer peripheral wall of each limiting plate body 3 , each limiting plate body 3 cannot be turned outward.

[0034] The interior of the frustum-shaped structure formed by the multiple limiting plates 3 forms a containing space, and the workpiece 19 to be processed can be placed in the containing space. The driving mounting portion 2 moves so that the small diameter side of the frustum-shaped structure moves toward the first surface 20. The limiting plate 3 can generate a thrust toward the axis of the frustum-shaped structure on the workpiece 19 on the one hand, and can generate a pressure toward the first surface 20 on the workpiece 19 on the other hand, so that the workpiece 19 can be fixed to the first surface 20. Compared with the traditional clamp, firstly, the motor vehicle parts processing clamp of the embodiment of the present invention fixes the workpiece 19 through the internal space of the frustum-shaped structure surrounded by the multiple limiting plates 3, and can reliably fix various types of special-shaped workpieces 19 to the first surface 20, thereby improving the fixing effect. Secondly, the traditional clamp usually includes multiple clamping ends, and each clamping end mostly requires a separate driving structure to drive. In the embodiment of the present invention, the process of fixing the workpiece 19 can be realized by only driving the mounting portion 2 to move, and the structure is simple and reliable, and the manufacturing cost is also lower. Furthermore, after the fixing ring 4 is removed from the outer peripheral wall of the frustum-shaped structure, the limiting effect of the limiting plate body 3 on the workpiece 19 disappears, and the workpiece 19 can be quickly removed from the first surface 20, thereby improving the processing efficiency of the workpiece 19.

[0035] See also Figure 1In some embodiments, along the first direction, the mounting portion 2 is disposed on a side of the base 1 away from the first surface 20 , the base 1 is provided with a through hole 5 corresponding to the limiting plate body 3 , and the limiting plate body 3 is penetrated through the through hole 5 .

[0036] When the mounting portion 2 is disposed on a side of the base 1 away from the first surface 20 , the larger diameter side of the frustum-shaped structure is also located on a side of the base 1 away from the first surface 20 .

[0037] On the one hand, by arranging the mounting portion 2 on the side of the base 1 away from the first surface 20, the space occupied by the mounting portion 2 on the first surface 20 is reduced, so that the first surface 20 can include more space for placing the workpiece 19. On the other hand, the center of the workpiece 19 can be located at the axis of the frustum-shaped structure, thereby improving the fixing effect of the workpiece 19.

[0038] See also Figure 1 In some embodiments, a limiting groove 6 is provided on the outer wall surface of the limiting plate body 3 , and the limiting groove 6 is used to accommodate the fixing ring 4 .

[0039] A plurality of limiting grooves 6 may be provided, and correspondingly, the fixing ring 4 may also include a plurality of grooves with different radii, so that the size of the internal space of the frustum-shaped structure can be adjusted according to the size of the workpiece 19 .

[0040] The fixing ring 4 is accommodated in the limiting groove 6, which reduces the risk that the fixing ring 4 moves relative to the limiting plate body 3, so that the limiting effect of the fixing ring 4 on the limiting plate body 3 disappears.

[0041] See also Figure 2 In some embodiments, the fixing ring 4 includes a first half ring 17 and a second half ring 18, and the first half ring 17 and the second half ring 18 are detachably connected.

[0042] The first half ring 17 and the second half ring 18 are detachably connected, which means that the ends of the first half ring 17 and the second half ring 18 are detachably connected.

[0043] The first half ring 17 and the second half ring 18 can be detachably connected by bolts and nuts. For example, the ends of the first half ring 17 and the second half ring 18 can be respectively provided with through holes, and the bolts pass through the through holes and are connected to the nuts, so that the ends of the first half ring 17 and the second half ring 18 can be connected.

[0044] The first half ring 17 and the second half ring 18 are detachably connected, so as to facilitate the removal of the fixing ring 4 from the outer peripheral wall of the frustum-shaped structure, and further facilitate the rapid removal of the workpiece 19 from the first surface 20 .

[0045] See also Figure 1 In some embodiments, a flexible abutment portion 7 is provided on the inner wall surface of the limiting plate body 3 , and a side of the flexible abutment portion 7 facing the workpiece 19 is an arc-shaped surface.

[0046] The flexible abutment 7 is intended to come into contact with a workpiece 19 .

[0047] On the one hand, the flexible abutment portion 7 reduces the risk of damaging the surface of the workpiece 19 when the limit plate 3 fixes the workpiece 19. On the other hand, the flexible abutment portion 7 can increase the contact area between the limit plate 3 and the workpiece 19, thereby improving the fixing effect of the limit plate 3 on the workpiece 19.

[0048] The arc-shaped surface of the flexible abutment portion 7 facilitates generating a thrust toward the axis of the frustum-shaped structure and a pressure toward the first surface 20 on the workpiece 19 .

[0049] See also Figure 1 and Figure 3 In some embodiments, the motor vehicle parts processing fixture further includes a fixing assembly, which includes an annular slide rail 8, a sliding portion 9, a telescopic component 10 and a fixing portion 11. The annular slide rail 8 is arranged on the base 1, the sliding portion 9 is slidably connected to the annular slide rail 8, and the telescopic component 10 is connected to the sliding portion 9. The fixing portion 11 is connected to the telescopic end of the telescopic component 10, and a mounting cavity 12 is arranged on a side of the fixing portion 11 away from the telescopic component 10, and an expansion portion 13 is rotatably connected in the mounting cavity 12, and the rotation axis of the expansion portion 13 is perpendicular to the first direction, and the mounting cavity 12 is provided with an opening for the expansion portion 13 to be rotated out.

[0050] The sliding part 9 is slidably connected to the annular slide rail 8 , so that the position of the sliding part 9 relative to the base 1 can be adjusted, thereby facilitating adjustment of the position of the fixing part 11 relative to the base 1 , so that the fixing part 11 can correspond to the hole of the workpiece 19 .

[0051] The telescopic member 10 may be a pneumatic cylinder or a hydraulic cylinder, and a cylinder body of the pneumatic cylinder or the hydraulic cylinder is fixed to the sliding portion 9 .

[0052] The telescopic component 10 is used to drive the fixing part 11 to move.

[0053] The fixing portion 11 and the expansion portion 13 can fix the position of the workpiece 19 perpendicular to the first direction, thereby improving the fixing effect of the workpiece 19. Specifically, for some workpieces 19, there may be holes on the workpiece 19, for example, the workpiece 19 may have bolt holes for bolts to pass through to fix the workpiece 19 when in use. When the workpiece 19 is placed on the first surface 20, the hole on the workpiece 19 is aligned with the fixing portion 11, and then the fixing portion 11 is driven to move by the telescopic component 10, so that the fixing portion 11 can partially pass through the hole on the workpiece 19. Under the action of the installation cavity 12, the expansion portion 13 can pass through the hole on the workpiece 19 with the fixing portion 11. When the expansion portion 13 is located on the side of the workpiece 19 away from the first surface 20, the expansion portion 13 is rotated so that the expansion portion 13 is rotated out of the installation cavity 12, and then the telescopic component 10 drives the fixing portion 11 to move toward the first surface 20, and the expansion portion 13 abuts against the side of the workpiece 19 away from the first surface 20, so that the workpiece 19 can be fixed.

[0054] The fixing portion 11 may be provided with abutting portions to limit the outward rotation angle of the expansion portion 13 so that the expansion portion 13 can stably abut against the workpiece 19 .

[0055] See also Figure 4 In some embodiments, along the first direction, the annular slide rail 8 includes a first wall 14, the first wall 14 is located on the side of the annular slide rail 8 close to the first surface 20, the sliding portion 9 is clearance-matched with the first wall 14, the first wall 14 includes a second surface 21 facing the sliding portion 9, the first wall 14 is movably provided with a plurality of limiting portions 16, the limiting portions 16 protrude from the second surface 21, and the plurality of limiting portions 16 are arranged along the extension direction of the annular slide rail 8.

[0056] In an embodiment where the first direction is a vertical direction, the first wall 14 may be a top wall of the annular slide rail 8 , and the second surface 21 may be a bottom surface of the annular slide rail 8 .

[0057] The first wall 14 may have an opening, and the sliding portion 9 may be connected to the telescopic component 10 through the opening.

[0058] The sliding portion 9 and the first wall 14 are clearance-matched, so that the sliding portion 9 can move along the first direction in the annular slide rail 8 .

[0059] When the expansion portion 13 abuts against a side of the workpiece 19 away from the first surface 20 , the telescopic component 10 can move the sliding portion 9 so that the sliding portion 9 abuts against the second surface 21 .

[0060] When there is a gap between the sliding part 9 and the second surface 21, the sliding part 9 can move along the annular slide rail 8. When the sliding part 9 abuts against the second surface 21, part of the limiting part 16 is pushed by the sliding part 9 and no longer protrudes from the second surface 21. At this time, the other limiting parts 16 that still protrude from the second surface 21 limit the sliding part 9, so that the sliding part 9 cannot move along the annular slide rail 8.

[0061] Under the action of the limiting portion 16 , the sliding portion 9 can be locked on the annular slide rail 8 , thereby reducing the risk of displacement of the sliding portion 9 when the fixing assembly is working.

[0062] See also Figure 4 In some embodiments, a receiving cavity is disposed inside the first wall 14 , and a sliding hole is disposed in the receiving cavity that passes through the second surface 21 , and the limiting portion 16 is disposed in the sliding hole.

[0063] The limiting portion 16 is inserted into the sliding hole, thereby achieving the purpose of sliding connection between the limiting portion 16 and the first wall 14 .

[0064] The accommodating cavity can accommodate the limiting portion 16 , so that the limiting portion 16 can be pressed into the accommodating cavity by the sliding portion 9 and no longer protrudes from the second surface 21 .

[0065] In some embodiments, the accommodating cavity extends along the extension direction of the annular slide rail 8 , a plurality of limiting portions 16 are provided corresponding to the slide hole, an elastic cushion layer 15 is accommodated in the accommodating cavity, and a plurality of limiting portions 16 abut against the elastic cushion layer 15 .

[0066] The accommodating cavity extends along the extending direction of the annular slide rail 8 , so that the limiting portions 16 arranged at the same radial intervals can share one accommodating cavity.

[0067] The elastic cushion layer 15 is used to reset the limiting portion 16 , so that after being pushed into the accommodating cavity by the sliding portion 9 , the limiting portion 16 can protrude from the second surface 21 again under the action of the elastic restoring force of the elastic cushion layer 15 .

[0068] The elastic cushion layer 15 can be made of rubber.

[0069] Although the purpose of resetting the limit portion 16 can also be achieved by using a spring, the spring needs to be set one-to-one with the limit portion 16. On the one hand, the installation process is complicated, and on the other hand, the cost is high. The elastic pad layer 15 allows multiple limit portions 16 to share one elastic pad layer 15, making the installation process more convenient and quick, and the manufacturing cost is also lower.

[0070] In some embodiments, along the first direction, a flexible protective layer is provided on one side of the elastic cushion layer 15 facing the limiting portion 16 , and the material of the flexible protective layer includes a composite material of carbon fiber and nylon 66.

[0071] The flexible protective layer and the elastic cushion layer 15 can be fused, that is, the side of the elastic cushion layer 15 facing the limiting portion 16 is first heated to soften it, and then the flexible protective layer is pressed against the elastic cushion layer 15, so that the elastic cushion layer 15 and the flexible protective layer are more reliably connected.

[0072] The flexible protective layer can protect the elastic cushion layer 15 and reduce the risk of the elastic cushion layer 15 being punctured by the limiting portion 16 .

[0073] The flexible protective layer is made of a composite material of carbon fiber and nylon 66, which has a good anti-puncture effect and reduces the risk of the elastic cushion layer 15 being punctured by the limiting portion 16.

[0074] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A motor vehicle parts processing fixture, characterized in that: include: A base (1) comprising a first surface (20), wherein the first surface (20) is used to place a workpiece (19); A limit assembly comprises a mounting portion (2), a fixing ring (4) and a plurality of limit plates (3); the mounting portion (2) is movably arranged on the base (1) along a first direction; the plurality of limit plates (3) are rotatably connected to the mounting portion (2); the rotation axis of the limit plate (3) is perpendicular to the first direction; the plurality of limit plates (3) form a frustum-shaped structure; the axis of the frustum-shaped structure extends along the first direction; and the fixing ring (4) is sleeved on the outer peripheral wall of the frustum-shaped structure.

2. The motor vehicle parts processing fixture according to claim 1 is characterized in that: Along the first direction, the mounting portion (2) is arranged on a side of the base (1) away from the first surface (20), the base (1) is provided with a through hole (5) corresponding to the limiting plate body (3), and the limiting plate body (3) is penetrated through the through hole (5).

3. The motor vehicle parts processing fixture according to claim 1 is characterized in that: The outer wall surface of the limiting plate body (3) is provided with a limiting groove (6), and the limiting groove (6) is used to accommodate the fixing ring (4).

4. The motor vehicle parts processing fixture according to claim 1 is characterized in that: The fixing ring (4) comprises a first half ring (17) and a second half ring (18), wherein the first half ring (17) and the second half ring (18) are detachably connected.

5. The motor vehicle parts processing fixture according to claim 1, characterized in that: The inner wall surface of the limiting plate body (3) is provided with a flexible abutment portion (7), and the side of the flexible abutment portion (7) facing the workpiece (19) is an arc-shaped surface.

6. The motor vehicle parts processing fixture according to any one of claims 1 to 5, characterized in that: Also included is a fixing assembly, the fixing assembly comprising: An annular slide rail (8) is arranged on the base (1); A sliding portion (9) slidably connected to the annular slide rail (8); A telescopic component (10) connected to the sliding portion (9); A fixed portion (11) is connected to the telescopic end of the telescopic component (10); a mounting cavity (12) is provided on a side of the fixed portion (11) away from the telescopic component (10); an expansion portion (13) is rotatably connected in the mounting cavity (12); a rotation axis of the expansion portion (13) is perpendicular to the first direction; and the mounting cavity (12) is provided with an opening for the expansion portion (13) to be rotated out.

7. The motor vehicle parts processing fixture according to claim 6 is characterized in that: Along the first direction, the annular slide rail (8) includes a first wall (14), the first wall (14) is located on a side of the annular slide rail (8) close to the first surface (20), the sliding portion (9) is clearance-matched with the first wall (14), the first wall (14) includes a second surface (21) facing the sliding portion (9), the first wall (14) is movably provided with a plurality of limiting portions (16), the limiting portions (16) protrude from the second surface (21), and the plurality of limiting portions (16) are arranged along the extension direction of the annular slide rail (8).

8. The motor vehicle parts processing fixture according to claim 7 is characterized in that: The first wall (14) is provided with an accommodating cavity inside, the accommodating cavity is provided with a sliding hole penetrating the second surface (21), and the limiting portion (16) is penetrated through the sliding hole.

9. The motor vehicle parts processing fixture according to claim 8, characterized in that: The accommodating cavity extends along the extension direction of the annular slide rail (8), a plurality of the slide holes are arranged corresponding to the limiting portions (16), an elastic cushion layer (15) is accommodated in the accommodating cavity, and a plurality of the limiting portions (16) abut against the elastic cushion layer (15).

10. The motor vehicle parts processing fixture according to claim 9, characterized in that: Along the first direction, a flexible protective layer is provided on the side of the elastic cushion layer (15) facing the limiting portion (16), and the material of the flexible protective layer includes carbon fiber and nylon 66 composite material.

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