A processing fixture for parts of a motor train unit

Abstract

The application relates to a motor train unit part machining clamp and relates to the motor train unit part machining technical field. The motor train unit part machining clamp comprises a base and a limiting assembly. The base comprises a first surface used for placing a workpiece. The limiting assembly comprises a mounting portion, a fixing ring and a plurality of limiting plate bodies. The mounting portion is movably arranged on the base along a first direction. The plurality of limiting plate bodies are rotationally connected to the mounting portion. The rotating shafts of the limiting plate bodies are perpendicular to the first direction. The plurality of limiting plate bodies enclose a conical frustum structure. The axis of the conical frustum structure extends along the first direction. The fixing ring is sleeved on the outer circumferential wall of the conical frustum structure. The internal space of the conical frustum structure enclosed by the plurality of limiting plate bodies is used for fixing the workpiece. Various different types of special-shaped workpieces can be reliably fixed on the first surface, and the fixing effect is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of motor train unit part machining, and particularly relates to a motor train unit part machining clamp. BACKGROUND

[0002] As a kind of transport equipment integrated with various high-tech technologies, motor train unit includes a large number of parts, and among the numerous parts, there are many special-shaped parts. The traditional clamp is mostly suitable for clamping parts with regular profiles. When clamping special-shaped parts, reliable contact cannot be formed between the clamping end and the parts, which leads to the fact that the special-shaped parts cannot be reliably fixed, so that the yield of products is reduced and the processing quality is decreased when processing special-shaped parts. SUMMARY

[0003] The present application aims to provide a motor train unit part machining clamp capable of reliably fixing special-shaped parts.

[0004] To achieve the above-mentioned application purposes, the technical solution adopted by the present application is as follows: the present application embodiment provides a motor train unit part machining clamp, which comprises a base and a limiting assembly. The base comprises a first surface for placing a workpiece. The limiting assembly comprises a mounting portion, a fixing ring and a plurality of limiting plate bodies. The mounting portion is movably arranged on the base along a first direction. The plurality of limiting plate bodies are rotationally connected to the mounting portion. The rotation axis of the limiting plate bodies is perpendicular to the first direction. The plurality of limiting plate bodies form a frustoconical structure. The axis of the frustoconical structure extends along the first direction. The fixing ring is sleeved on the outer peripheral wall of the frustoconical structure.

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

[0006] In some embodiments, the outer wall surface of the limiting plate body is provided with a limiting groove for accommodating the fixing ring.

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

[0008] In some embodiments, the inner wall surface of the limiting plate body is provided with a flexible abutting portion, and the side of the flexible abutting portion facing the workpiece is arc-shaped.

[0009] In some embodiments, the motor car part machining clamp further comprises a fixing assembly, the fixing assembly comprises an annular slide rail, a sliding part, an extension 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 extension part is connected to the sliding part. The fixing part is connected to the extension end of the extension part, a mounting cavity is arranged on the side of the fixing part away from the extension part, a extending part is rotatably connected in the mounting cavity, the rotating axis of the extending part is perpendicular to the first direction, and the mounting cavity is provided with an opening for the extending part to rotate out.

[0010] In some embodiments, along the first direction, the annular slide rail comprises a first wall located on the side of the annular slide rail close to the first surface, the sliding part is gap-fitted with the first wall, the first wall comprises a second surface facing the sliding part, and the first wall is movably provided with a plurality of limiting parts protruding from the second surface, and the plurality of limiting parts are arranged along the extension direction of the annular slide rail.

[0011] In some embodiments, the inside of the first wall is provided with a containing cavity, the containing cavity is provided with a sliding hole penetrating through the second surface, and the limiting part is arranged in the sliding hole.

[0012] In some embodiments, the containing cavity extends along the extension direction of the annular slide rail, a plurality of sliding holes corresponding to the limiting parts are arranged, the containing cavity contains an elastic pad layer, and the plurality of limiting parts abut against the elastic pad layer.

[0013] In some embodiments, along the first direction, the side of the elastic pad layer facing the limiting part is provided with a flexible protective layer, and the material of the flexible protective layer comprises a carbon fiber and nylon 66 composite material.

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

[0015] 1. Compared with the traditional clamp, firstly, the motor car part machining clamp of the embodiment of the present application fixes the workpiece in the internal space of the conical structure surrounded by the plurality of limiting plates, can reliably fix various different types of special-shaped workpieces on the first surface, improves the fixing effect. Secondly, the traditional clamp usually comprises a plurality of clamping ends, each clamping end needs a separate driving structure for driving, in the embodiment of the present application, only the driving mounting part needs to be moved to realize the process of fixing the workpiece, the structure is simple and reliable, and the manufacturing cost is also lower. In addition, after the fixing ring is detached from the peripheral wall of the conical structure, the limiting action of the limiting plate on the workpiece disappears, the workpiece can be quickly taken off from the first surface, and the processing efficiency of the workpiece is improved.

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

[0017] Figure 1 It is a structural schematic view of the motor car part machining clamp of the present application.

[0018] Figure 2 A structure diagram of the fixed ring of the present application;

[0019] Figure 3 An enlarged view of A of Figure 1

[0020] Figure 4 An enlarged view of B of Figure 1

[0021] Figure 5 A cooperation diagram of the sliding part and the limiting part of the present application.

[0022] The figure reference: 1-base, 2-mounting part, 3-limiting plate body, 4-fixed ring, 5-through hole, 6-limiting groove, 7-flexible abutting part, 8-ring-shaped sliding rail, 9-sliding part, 10- telescopic part, 11-fixed part, 12-mounting cavity, 13-expanding part, 14-first wall, 15-elastic pad, 16-limiting part, 17-first half ring, 18-second half ring, 19-workpiece, 20-first face, 21-second face. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. If not specifically indicated, the technical means used in the embodiments are conventional means familiar to those skilled in the art.

[0024] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] Referring to Figure 1 , the embodiment of the present application provides a motor vehicle part machining clamp, which comprises a base 1 and a limiting assembly. The base 1 comprises a first face 20, which is used for placing a workpiece 19. The limiting assembly comprises a mounting part 2, a fixed ring 4 and a plurality of limiting plate bodies 3. The mounting part 2 is movably arranged on the base 1 along a first direction. The plurality of limiting plate bodies 3 are rotationally connected to the mounting part 2. The rotation axis of the limiting plate body 3 is perpendicular to the first direction. The plurality of limiting plate bodies 3 form a conical frustum structure. The axis of the conical frustum structure extends along the first direction. The fixed ring 4 is sleeved on the outer peripheral wall of the conical frustum structure.

[0026] ​​The motor vehicle part machining clamp can be used for clamping the part during machining of the special-shaped motor vehicle part, and facilitates machining of the equipment.

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

[0028] The first direction can be a direction shown by a Z axis in the figure, and the first direction can also be a vertical direction.

[0029] The mounting portion 2 is used for integrally mounting the limiting plate bodies 3, so that the plurality of limiting plate bodies 3 can form a frustoconical structure.

[0030] The base 1 can be provided with a guide rail extending in the first direction, and the mounting portion 2 is slidingly connected to the guide rail, so that the mounting portion 2 can move relative to the base 1.

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

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

[0033] The fixing ring 4 is used for limiting the plurality of limiting plate bodies 3, and the fixing ring 4 is sleeved on the outer peripheral wall of each limiting plate body 3, so that each limiting plate body 3 cannot be turned outward.

[0034] The inside of the frustoconical structure formed by the plurality of limiting plate bodies 3 forms an accommodation space, and the workpiece 19 to be machined can be placed in the accommodation space. The mounting portion 2 is driven to move, so that the small-diameter side of the frustoconical structure moves towards the first surface 20. The limiting plate bodies 3 can generate a pushing force towards the axis of the frustoconical structure on the workpiece 19, and can also generate a pressure towards the first surface 20 on the workpiece 19, so that the workpiece 19 can be fixed to the first surface 20. Compared with the traditional clamp, firstly, the motor vehicle part machining clamp of the embodiment of the present application fixes the workpiece 19 in the internal space of the frustoconical structure surrounded by the plurality of limiting plate bodies 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 a plurality of clamping ends, and each clamping end needs to be driven by a separate driving structure. In the embodiment of the present application, the process of fixing the workpiece 19 can be realized only by driving the mounting portion 2 to move, and the structure is simple and reliable, and the manufacturing cost is also lower. In addition, after the fixing ring 4 is detached from the outer peripheral wall of the frustoconical structure, the limiting action of the limiting plate bodies 3 on the workpiece 19 disappears, and the workpiece 19 can be quickly removed from the first surface 20, thereby improving the machining efficiency of the workpiece 19.

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

[0036] When the mounting portion 2 is arranged on the side of the base 1 away from the first surface 20, the large-diameter side of the frustoconical structure is also located on the 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, on the one hand, 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 to place the workpiece 19. On the other hand, the center of the workpiece 19 can be located on the axis of the frustoconical structure, thereby improving the fixing effect of the workpiece 19.

[0038] Referring to Figure 1 In some embodiments, the outer wall surface of the limiting plate body 3 is provided with a limiting groove 6 for accommodating the fixing ring 4.

[0039] The limiting groove 6 can be provided with a plurality of corresponding fixing rings 4, which can include a plurality of different radii, so that the size of the internal space of the frustoconical 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 movement of the fixing ring 4 relative to the limiting plate body 3, so that the risk of the limiting effect of the fixing ring 4 on the limiting plate body 3 disappears.

[0041] Referring to 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 detachable connection of the first half ring 17 and the second half ring 18 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 provided with through holes, respectively, and the bolts pass through the through holes and are connected with the nuts, so that the ends of the first half ring 17 and the second half ring 18 can be connected.

[0044] The detachable connection of the first half ring 17 and the second half ring 18 facilitates the disassembly of the fixing ring 4 from the outer peripheral wall of the frustoconical structure, and further facilitates the quick removal of the workpiece 19 from the first surface 20.

[0045] Referring to Figure 1 In some embodiments, the inner wall surface of the limiting plate body 3 is provided with a flexible abutting portion 7, and the side of the flexible abutting portion 7 facing the workpiece 19 is an arc surface.

[0046] The flexible abutting part 7 is used to contact the workpiece 19.

[0047] The flexible abutting part 7 can reduce the risk of damaging the surface of the workpiece 19 when the limiting plate body 3 fixes the workpiece 19, and can increase the contact area between the limiting plate body 3 and the workpiece 19, thereby improving the fixing effect of the limiting plate body 3 on the workpiece 19.

[0048] The arc surface of the flexible abutting part 7 can facilitate the generation of a pushing force towards the axis of the conical structure and a pressure towards the first surface 20 on the workpiece 19.

[0049] Referring to Figure 1 and Figure 3 In some embodiments, the motor vehicle part machining clamp further comprises a fixing assembly, and the fixing assembly comprises an annular slide rail 8, a sliding part 9, an extension part 10, and a fixing part 11. The annular slide rail 8 is arranged on the base 1, the sliding part 9 is slidably connected to the annular slide rail 8, and the extension part 10 is connected to the sliding part 9. The fixing part 11 is connected to the extension end of the extension part 10, and the side of the fixing part 11 away from the extension part 10 is provided with a mounting cavity 12. The mounting cavity 12 is rotatably connected to an expansion part 13, the rotation axis of the expansion part 13 is perpendicular to the first direction, and the mounting cavity 12 is provided with an opening for the expansion part 13 to rotate out of.

[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 the 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 extension part 10 can be a pneumatic cylinder or a hydraulic cylinder, and the cylinder body of the pneumatic cylinder or the hydraulic cylinder is fixed to the sliding part 9.

[0052] The extension part 10 is used to drive the movement of the fixing part 11.

[0053] The fixing part 11 and the expanding part 13 can fix the position of the workpiece 19 in the direction perpendicular to the first direction, thereby improving the fixing effect of the workpiece 19. Specifically, for some workpieces 19, there can be holes on the workpiece 19, for example, the workpiece 19 can have bolt holes for bolts to pass through to fix the workpiece 19 in use. When the workpiece 19 is placed on the first surface 20, the holes on the workpiece 19 are aligned with the fixing part 11, and then the fixing part 11 is driven to move by the telescopic part 10, so that the fixing part 11 can partially pass through the holes on the workpiece 19. Under the action of the mounting cavity 12, the expanding part 13 can pass through the holes on the workpiece 19 along with the fixing part 11. When the expanding part 13 is located on the side of the workpiece 19 away from the first surface 20, the expanding part 13 is rotated so as to be rotated out of the mounting cavity 12, and then the telescopic part 10 drives the fixing part 11 to move towards the first surface 20. The expanding part 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 part 11 can be provided with an abutting part to limit the angle of the expanding part 13 rotating outward, so that the expanding part 13 can stably abut against the workpiece 19.

[0055] Referring to Figure 4 In some embodiments, along the first direction, the annular slide rail 8 includes a first wall 14 located on the side of the annular slide rail 8 close to the first surface 20, the sliding part 9 is in clearance fit with the first wall 14, the first wall 14 includes a second surface 21 facing the sliding part 9, and the first wall 14 is movably provided with a plurality of limiting parts 16 protruding from the second surface 21, and the plurality of limiting parts 16 are arranged along the extension direction of the annular slide rail 8.

[0056] In embodiments in which the first direction is a vertical direction, the first wall 14 can be a top wall of the annular slide rail 8, and the second surface 21 can be a bottom surface of the annular slide rail 8.

[0057] The first wall 14 can have an opening, and the sliding part 9 can be connected with the telescopic part 10 through the opening.

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

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

[0060] When the sliding part 9 is away from the second surface 21, the sliding part 9 can move along the annular slide rail 8, and when the sliding part 9 abuts against the second surface 21, the partial limiting part 16 is pushed by the sliding part 9 and no longer protrudes from the second surface 21, and at this time, the limiting part 16 which still protrudes from the second surface 21 limits 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 part 16, the sliding part 9 can be locked on the annular slide rail 8, thereby reducing the risk of displacement of the sliding part 9 when the fixing assembly is working.

[0062] Referring to Figure 4 In some embodiments, the first wall 14 is internally provided with a containing cavity, and the containing cavity is provided with a sliding hole penetrating through the second surface 21, and the limiting part 16 is arranged in the sliding hole.

[0063] The limiting part 16 is arranged in the sliding hole, thereby achieving the purpose of sliding connection between the limiting part 16 and the first wall 14.

[0064] The containing cavity can contain the limiting part 16, so that the limiting part 16 can be pressed into the containing cavity by the sliding part 9 and no longer protrude from the second surface 21.

[0065] In some embodiments, the containing cavity extends along the extension direction of the annular slide rail 8, the sliding hole is provided with a plurality of sliding holes corresponding to the limiting part 16, the containing cavity contains an elastic pad layer 15, and the plurality of limiting parts 16 abut against the elastic pad layer 15.

[0066] The containing cavity extends along the extension direction of the annular slide rail 8, so that the limiting parts 16 arranged at the same radius can share one containing cavity.

[0067] The elastic pad layer 15 is used for resetting the limiting part 16, so that after the limiting part 16 is pressed into the containing cavity by the sliding part 9, the limiting part 16 can protrude from the second surface 21 again under the action of the elastic restoring force of the elastic pad layer 15.

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

[0069] Although the spring can also achieve the purpose of resetting the limiting part 16, the spring needs to be arranged one by one corresponding to the limiting part 16, which is complicated in the installation process and high in cost, and the elastic pad layer 15 makes a plurality of limiting parts 16 share one elastic pad layer 15, so that the installation process is more convenient and fast, and the manufacturing cost is also lower.

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

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

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

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

[0074] The above embodiments only describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications, variations, modifications and replacements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A jig for machining high-speed train parts, characterized in that, The utility model relates to a workpiece fixing device, including: a base (1) comprising a first surface (20) for placing a workpiece (19); a limiting assembly comprising a mounting portion (2), a fixing ring (4) and a plurality of limiting plate bodies (3), the mounting portion (2) is movably arranged on the base (1) along a first direction, the plurality of limiting plate bodies (3) are rotationally connected to the mounting portion (2), the rotation axis of the limiting plate bodies (3) is perpendicular to the first direction, the plurality of limiting plate bodies (3) enclose a frustoconical structure, the axis of the frustoconical structure extends along the first direction, and the fixing ring (4) is sleeved on the outer peripheral wall of the frustoconical structure; and further comprising a fixing assembly, the fixing assembly comprising: a ring-shaped slide rail (8) arranged on the base (1); a sliding portion (9) slidably connected to the ring-shaped slide rail (8); a telescopic component (10) connected to the sliding portion (9); a fixing portion (11) connected to the telescopic end of the telescopic component (10), the fixing portion (11) is provided with a mounting cavity (12) on the side away from the telescopic component (10), a telescopic portion (13) is rotationally connected in the mounting cavity (12), the rotation axis of the telescopic portion (13) is perpendicular to the first direction, and the mounting cavity (12) is provided with an opening for the telescopic portion (13) to rotate out.

2. The motor car part machining clamp according to claim 1, wherein Along the first direction, the mounting portion (2) is arranged on the 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 arranged in the through hole (5).

3. The motor car part machining clamp according to claim 1, characterized in that, The outer wall surface of the limiting plate body (3) is provided with a limiting groove (6) for accommodating the fixing ring (4).

4. The railcar component machining fixture of claim 1, wherein, The fixing ring (4) comprises 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.

5. The railcar component machining fixture of claim 1, wherein, The inner wall surface of the limiting plate body (3) is provided with a flexible abutting portion (7), and the side of the flexible abutting portion (7) facing the workpiece (19) is an arc surface.

6. The railcar component machining fixture of claim 1, wherein, Along the first direction, the ring-shaped slide rail (8) comprises a first wall (14) located on the side of the ring-shaped slide rail (8) close to the first surface (20), the sliding portion (9) is in gap cooperation with the first wall (14), the first wall (14) comprises a second surface (21) facing the sliding portion (9), the first wall (14) is movably provided with a plurality of limiting portions (16) protruding from the second surface (21), and the plurality of limiting portions (16) are arranged along the extension direction of the ring-shaped slide rail (8).

7. The railcar component machining fixture of claim 6, wherein, The first wall (14) is provided with a containing cavity, the containing cavity is provided with a sliding hole penetrating through the second surface (21), and the limiting portion (16) is arranged in the sliding hole.

8. The railcar component machining fixture of claim 7, wherein, The containing cavity extends along the extension direction of the ring-shaped slide rail (8), the sliding hole is provided with a plurality of openings corresponding to the limiting portion (16), the containing cavity contains an elastic pad layer (15), and the plurality of limiting portions (16) abut against the elastic pad layer (15).

9. The railcar component machining fixture of claim 8, wherein, In the first direction, the elastic pad (15) is provided with a flexible protective layer on the side facing the limiting part (16), and the material of the flexible protective layer comprises carbon fiber and nylon 66 composite material.

Images