Rail transit vehicle side wall machining clamp

Abstract

The utility model discloses a rail transit vehicle side wall machining clamp which comprises a cross beam, hydraulic pressing devices are symmetrically arranged at the left end and the right end of the cross beam through guide rails, the hydraulic pressing devices are connected with a power mechanism, and the power mechanism controls the hydraulic pressing devices to move leftwards and rightwards on the guide rails. The hydraulic pressing device comprises a seat body, a positioning supporting block used for abutting against the end face of the side wall is arranged on the inner side face of the seat body, a pressing elbow is hinged to the seat body, a hydraulic cylinder is arranged in the seat body and connected with a rack to do telescopic motion, and the rack drives the pressing elbow to rotate around a hinge point through a gear. The hydraulic pressing device moves to fix the side wall to the positioning supporting block, meanwhile, the pressing elbow is arranged, the auxiliary pressing effect on the side wall can be achieved, and through the design, it can be guaranteed that a workpiece is clamped reliably, and the machining precision of the workpiece is improved. The product is reasonable in overall layout, high in efficiency and good in compatibility, and automation and high efficiency of machining operation of the aluminum alloy vehicle body side wall machine in the rail transit industry are achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of aluminum alloy car bodies for rail transit, and specifically relates to a machining fixture for the side wall of rail transit vehicles. Background Technology

[0002] Aluminum alloy car bodies for rail transit vehicles such as high-speed trains, bullet trains, and subways form the skeleton of these vehicles. The main material is aluminum alloy profiles, and they are primarily assembled and welded from large components such as the roof, side walls, and underframe. The large side wall components are often symmetrical, requiring pre-set anti-deformation and deflection curves to ensure the vehicle is level during assembly. Traditional fixtures can only guarantee the deflection of one side wall, making it difficult to ensure both side walls meet deflection requirements simultaneously. This results in poor fixture compatibility, making it impossible to simultaneously machine one or two side walls (symmetrical components), or requiring reversing during machining. This also increases production time, labor costs, and turnaround time. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a side wall machining fixture capable of clamping, positioning, pressing, and locking.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a machining fixture for the side wall of a rail transit vehicle, including a crossbeam, with hydraulic clamping devices symmetrically arranged at the left and right ends of the crossbeam via guide rails. The hydraulic clamping devices are connected to a power mechanism, which controls the hydraulic clamping devices to move left and right on the guide rails. The hydraulic clamping device includes a base, with a positioning support block for pressing against the end face of the side wall provided on the inner side of the base. A clamping elbow is hinged to the base, and a hydraulic cylinder is provided inside the base. The hydraulic cylinder is connected to a rack for telescopic movement. The rack drives the clamping elbow to rotate around the hinge point through a gear. A limit stop is provided on the crossbeam to control the moving distance of the two hydraulic clamping devices.

[0005] According to some embodiments of this utility model, there are four positioning support blocks, which are arranged from top to bottom as an inverted triangular support block, a triangular support block, a support block with a hook, and an arc-shaped support block. The inverted triangular support block and the triangular support block cooperate to press against the end face of the side wall with a large arc, and the support block with a hook and the arc-shaped support block cooperate to press against the end face of the side wall with a small arc.

[0006] According to some embodiments of this utility model, the crossbeam is provided with a plurality of support blocks that support the side walls.

[0007] According to some embodiments of this utility model, the top of the pressing elbow is hinged with a double nylon pressing head.

[0008] According to some embodiments of this utility model, the crossbeam is provided with a scale that displays the moving distance of the hydraulic clamping device.

[0009] According to some embodiments of the present invention, the base is provided with a locking handle for locking the hydraulic clamping device onto the crossbeam.

[0010] According to some embodiments of this utility model, a slider is provided at the bottom of the base to slide in cooperation with the guide rail.

[0011] According to some embodiments of this utility model, the bottom of the crossbeam is provided with supporting feet.

[0012] According to some embodiments of this utility model, the power mechanism is a hydraulic telescopic rod structure.

[0013] This invention has at least the following beneficial effects: Firstly, a hydraulic clamping device moves to fix the side wall onto the positioning support block. Simultaneously, a clamping elbow is provided to assist in clamping the side wall. This design ensures reliable workpiece clamping and improves workpiece machining accuracy. The product has a reasonable overall layout, high efficiency, and good compatibility, realizing the automation and high efficiency of aluminum alloy car body side wall machining operations in the rail transit industry.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a reference diagram showing the usage state of this utility model;

[0018] Figure 3 This is a reference diagram showing the machining state of one side wall of this utility model;

[0019] Figure 4 This is a reference drawing showing the machining state of the two side walls of this utility model;

[0020] Figure 5 for Figure 1 A schematic diagram of the internal structure at point A. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Reference Figure 1 , Figure 2 A machining fixture for the side wall of a rail transit vehicle includes a crossbeam 1 with supporting legs 16 at its bottom. Hydraulic clamping devices 2 are symmetrically arranged at the left and right ends of the crossbeam 1 via guide rails 11. Each hydraulic clamping device 2 is connected to a power mechanism, which controls its left and right movement on the guide rails 11. (Refer to...) Figure 5 The hydraulic clamping device 2 includes a base 21. The inner side of the base 21 is provided with a positioning support block 12 for pressing against the end face of the side wall. A clamping elbow 24 is hinged to the base 21. To prevent the clamping elbow 24 from rigidly impacting the supporting vehicle side wall 3, a double nylon pressure head 241 is hinged to the top of the clamping elbow 24. The double nylon pressure heads 241 are arranged left and right, providing good protection for the surface of the vehicle side wall 3. A hydraulic cylinder 22 is installed inside the base 21. The hydraulic cylinder 22 is connected to a rack 23 for telescopic movement. The rack 23 drives the clamping elbow 24 to rotate around the hinge point 26 via a gear 25. The hydraulic clamping device 2 uses a hydraulic cylinder-driven rack and pinion structure, allowing for a large rotation angle and applicability to various vehicle models. A limit stop 13 is provided on the crossbeam 1 to control the moving distance of the two hydraulic clamping devices 2.

[0026] Reference Figure 3 , Figure 4 There are four positioning support blocks 12, arranged from top to bottom as an inverted triangular support block 121, a triangular support block 122, a support block with a hook 123, and an arc-shaped support block 124. The inverted triangular support blocks 121 and 122 cooperate to press against the end face of the side wall with a large arc, while the support block with the hook 123 and 124 cooperate to press against the end face of the side wall with a small arc. To better support the vehicle side wall 3, several support blocks 17 are provided on the crossbeam 1 to support the side wall. When processing other large components, some of the support blocks 17 and positioning support blocks 12 can be replaced.

[0027] The power mechanism is a hydraulic telescopic rod structure. The telescopic rod is connected to the base 21, and the telescopic rod is controlled by a hydraulic cylinder to extend and retract, thereby enabling the hydraulic clamping device 2 to move left and right on the guide rail 11. After the hydraulic telescopic rod structure is installed in the inner cavity of the crossbeam 1, it is completely enclosed by a cover or protective cover to prevent aluminum chips from falling into its interior after processing and affecting the use of the product.

[0028] To ensure smoother movement of the hydraulic clamping device 2, a slider is provided at the bottom of the base 21 to slide in cooperation with the guide rail 11.

[0029] The crossbeam 1 is equipped with a limit stop 13 to control the movement distance of the hydraulic clamping device 2. Additionally, the crossbeam 1 is equipped with a scale 14 to display the movement distance of the hydraulic clamping device 2, used for deflection value and positioning dimension adjustment markings. Meanwhile, the base 21 is equipped with a locking handle 15 to lock the hydraulic clamping device 2 onto the crossbeam 1.

[0030] Reference Figure 2 When using this product, multiple processing fixtures can be arranged in parallel according to the size of the vehicle side wall 3 to fix and position the vehicle side wall 3.

[0031] This fixture is highly automated and easy to operate. Operators can operate it from the electrical control cabinet or with a remote control. In addition, a manual valve can be designed at the end of the crossbeam 1 to independently control the hydraulic clamping device 2 to move left and right on the guide rail 11, and to drive the clamping elbow 24 to rotate around the hinge point 26, in order to adapt to various sudden abnormalities in the production process.

[0032] This clamp can simultaneously support, position, and clamp the first and second side walls. The first side wall is located at the larger arc position, and the second side wall is located at the smaller arc position. (Refer to...) Figure 3When machining one side wall, the first side wall needs to be pushed and positioned against the inverted triangular support block 121 and the triangular support block 122. Then, the hydraulic clamping device 2 located on the right side of the crossbeam 1 is activated and moved to the left until the hook support block 123 and the arc support block 124 cooperate to press against the second side wall and are fixed by the limit stop 13. In order to prevent the hydraulic clamping device 2 from moving, the locking handle 15 can be rotated to lock the hydraulic clamping device 2 onto the crossbeam 1. Finally, the clamping elbow 24 on the seat 21 is activated to rotate downwards. After the first and second side walls are clamped, machining can begin.

[0033] Reference Figure 4 When processing the two side walls, the two side walls need to be pushed and positioned against the hook support block 123 and the arc support block 124. Then, the hydraulic clamping device 2 located on the right side of the crossbeam 1 is activated and moved to the left until the inverted triangular support block 121 and the triangular support block 122 cooperate to press against the first side wall and are fixed by the limit stop 13. In order to prevent the hydraulic clamping device 2 from moving, the locking handle 15 can be rotated to lock the hydraulic clamping device 2 onto the crossbeam 1. Finally, the clamping elbow 24 on the seat 21 is activated to rotate downwards. After the first and second side walls are clamped, machining can begin.

[0034] This product first uses a hydraulic clamping device 2 to move and fix the side wall onto the positioning support block 12. It also features a clamping elbow 24 to provide auxiliary clamping for the side wall. This design ensures reliable workpiece clamping and improves workpiece machining accuracy. The product has a reasonable overall layout, high efficiency, and good compatibility, realizing the automation and high efficiency of aluminum alloy car body side wall machining operations in the rail transit industry.

[0035] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A machining fixture for the side wall of a rail transit vehicle, characterized in that: The system includes a crossbeam (1), with hydraulic clamping devices (2) symmetrically arranged on the left and right ends of the crossbeam (1) via guide rails (11). The hydraulic clamping devices (2) are connected to a power mechanism, which controls the hydraulic clamping devices (2) to move left and right on the guide rails (11). The hydraulic clamping devices (2) include a base (21), with a positioning support block (12) for pressing against the end face of the side wall on the inner side of the base (21). A clamping elbow (24) is hinged on the base (21), and a hydraulic cylinder (22) is installed inside the base (21). The hydraulic cylinder (22) is connected to a rack (23) for telescopic movement. The rack (23) drives the clamping elbow (24) to rotate around the hinge point (26) via a gear (25). A limit stop (13) is provided on the crossbeam (1) to control the moving distance of the two hydraulic clamping devices (2).

2. The machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: There are four positioning support blocks (12), which are, from top to bottom, an inverted triangular support block (121), a triangular support block (122), a support block with a hook (123), and an arc-shaped support block (124). The inverted triangular support block (121) and the triangular support block (122) cooperate to press against the end face of the side wall with a large arc, and the support block with a hook (123) and the arc-shaped support block (124) cooperate to press against the end face of the side wall with a small arc.

3. The machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The crossbeam (1) is provided with several support blocks (17) that support the side walls.

4. A machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The top of the clamping elbow (24) is hinged with a double nylon clamping head (241).

5. A machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The crossbeam (1) is provided with a scale (14) that displays the moving distance of the hydraulic clamping device (2).

6. A machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The seat (21) is provided with a locking handle (15) for locking the hydraulic clamping device (2) onto the crossbeam (1).

7. A machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The bottom of the seat (21) is provided with a slider that slides in cooperation with the guide rail (11).

8. A machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The bottom of the crossbeam (1) is provided with a support leg (16).

9. A machining fixture for the side wall of a rail transit vehicle according to claim 1, characterized in that: The power mechanism is a hydraulic telescopic rod structure.

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