Railway vehicle rim machining and clamping assembly

Abstract

The utility model discloses a railway vehicle rim machining clamping assembly which comprises a multi-jaw chuck fixedly arranged on a rotating main shaft of a machine tool and used for supporting the inner wall of a rim of a rim in the radial direction. The pneumatic inner support chuck is coaxially arranged on the multi-jaw chuck and used for radially supporting a bearing hole of the rim, and the pneumatic inner support chuck is externally connected with a high-pressure air source; the axial locking piece is arranged on the pneumatic inner support chuck and is used for further limiting the axial movement of the rim on the pneumatic inner support chuck; and the moving platform is arranged on the ground, and a lifting bearing assembly used for bearing the rim is arranged on the moving platform. According to the utility model, the multi-jaw chuck and the pneumatic inner support chuck are arranged to respectively support the inner wall of the rim and the bearing hole of the rim, so that the dual positioning of the rim is realized, and the positioning stability of the rim is ensured; and by arranging the axial locking piece, the axial movement of the rim on the pneumatic inner supporting chuck is limited, and the positioning stability of the rim is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rail vehicle wheel rim machining technology, and specifically relates to a rail vehicle wheel rim machining clamping assembly. BACKGROUND

[0002] The safe operation of rail vehicles depends on the good condition of their wheelsets, and the wheel tread of the wheelset can affect the stability and safety of the train due to wear, scratches, or peeling after long-term use. Therefore, during maintenance, turning the wheel tread according to the actual situation is one of the important maintenance measures to ensure the safety and efficient operation of the train. The purpose of turning is to repair the above defects and restore the ideal geometric shape of the tread to ensure the best contact between the train and the rail, reduce noise and vibration, and prolong the service life of the wheelset.

[0003] In the existing wheelset turning process, the clamps are usually used to tightly press the wheel rims at both ends of the wheelset and the center holes at both ends of the wheelset shaft to achieve clamping and positioning of the entire wheelset. This method is suitable for undamaged wheelsets, but in the case of damaged or deformed wheelset shafts, the wheel rims must be detached from the wheelset shaft and turned separately. This is because the damaged wheelset shaft will affect the accuracy of the clamp, thereby reducing the turning quality. However, most clamps on the current market are not designed to consider the clamping needs of individual wheel rims, and cannot provide reliable fixation for wheel rims detached from the wheelset shaft, which not only increases the complexity and time cost of maintenance work, but also may cause precision loss during turning.

[0004] Therefore, the rail vehicle wheel rim machining clamping assembly is proposed to solve the above technical problems. INVENTION CONTENTS

[0005] The main purpose of the utility model is to solve the above-mentioned deficiencies and provide a rail vehicle wheel rim machining clamping assembly that can stably fix individual wheel rims detached from the wheelset shaft and ensure high precision during turning.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The rail vehicle wheel rim machining clamping assembly comprises: a multi-jaw chuck fixedly arranged on the rotating main shaft of a machine tool and used for radially supporting the inner wall of the rim of the wheel rim; a pneumatic inner support chuck coaxially arranged on the multi-jaw chuck and used for radially supporting the bearing hole of the wheel rim, the pneumatic inner support chuck being connected with a high-pressure gas source; an axial locking member arranged on the pneumatic inner support chuck and used for further limiting the axial movement of the wheel rim on the pneumatic inner support chuck; and a moving platform arranged on the ground, the moving platform being provided with a lifting support assembly used for supporting the wheel rim.

[0008] Further, the axial locking member comprises a connecting thread arranged on the rising sleeve end of the pneumatic inner support chuck and a top cover threadedly connected with the connecting thread.

[0009] Further, the top cover is fixedly provided with a hexagonal column at the non-opening end, the hexagonal column is coaxial with the top cover, and the diagonal distance of the hexagonal column is less than the diameter of the top cover.

[0010] Further, the moving platform comprises a bottom plate, a plurality of directional rollers rotatably arranged on the bottom of the bottom plate, and guide members arranged on both sides of the bottom plate, the rolling directions of the directional rollers and the guiding directions of the guide members are parallel to the axis of the multi-jaw chuck.

[0011] Further, the guide member comprises guide rods fixedly arranged on the ground and located on both sides of the bottom plate, and linear bearings fixedly arranged on both sides of the bottom plate and sleeved on the guide rods, the guide rods are parallel to the axis of the multi-jaw chuck.

[0012] Further, the lifting support assembly comprises two pneumatic telescopic rods symmetrically arranged on the bottom plate according to the axis of the multi-jaw chuck, a support plate fixedly arranged on the top of the two pneumatic telescopic rods, and a clamping groove arranged on the support plate and used for clamping the rim.

[0013] The beneficial effects of the utility model lie in:

[0014] The utility model discloses a multi-jaw chuck and a pneumatic inner support chuck are arranged, and the rim inner wall and bearing hole of the rim are respectively supported, double positioning of the rim is realized, and the stability of positioning is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification provide further understanding of the utility model, the schematic embodiment of the utility model and the explanation thereof are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0016] Figure 1 It is the use state schematic drawing of an embodiment of the utility model;

[0017] Figure 2 It is the axial locking member structure schematic drawing of an embodiment of the utility model;

[0018] Figure 3The wheel rim clamping state schematic view of one embodiment of the utility model;

[0019] Figure 4 The axial locking piece structure schematic view of one embodiment of the utility model;

[0020] Figure 5 The mobile platform and lifting support assembly structure schematic view of one embodiment of the utility model.

[0021] In the figure: 1, multi-claw chuck; 2, machine tool; 3, wheel rim; 4, pneumatic inner supporting chuck; 5, axial locking piece; 51, connecting thread; 52, top cover; 6, mobile platform; 61, bottom plate; 62, directional roller; 63, guide piece; 631, guide rod; 632, linear bearing; 7, lifting support assembly; 71, pneumatic telescopic rod; 72, support plate; 73, clamping groove; 8, expansion sleeve; 9, hexagonal column. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The embodiments in the application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] As Figures 1-5 shown, the utility model provides track vehicle wheel rim machining clamping assembly, including:

[0024] Multi-claw chuck 1 is fixedly arranged on the rotating main shaft of machine tool 2 and is used for radially supporting the inner wall of the rim of wheel rim 3; pneumatic inner supporting chuck 4 is coaxially arranged on multi-claw chuck 1 and is used for radially supporting the bearing hole of wheel rim 3; pneumatic inner supporting chuck 4 is connected with high-pressure gas source; axial locking piece 5 is arranged on pneumatic inner supporting chuck 4 and is used for further limiting the axial movement of wheel rim 3 on pneumatic inner supporting chuck 4; mobile platform 6 is arranged on the ground, and lifting support assembly 7 for supporting wheel rim 3 is arranged on mobile platform 6.

[0025] In use, first, the wheel rim 3 to be processed is placed on the lifting support assembly 7, the lifting support assembly 7 together with the wheel rim 3 is moved to the multi-jaw chuck 1 and the pneumatic inner support chuck 4 by the moving platform 6, when the wheel rim 3 approaches the pneumatic inner support chuck 4, the height of the wheel rim 3 is changed by the lifting support assembly 7, and the bearing hole of the wheel rim 3 is aligned with the insertion end of the pneumatic inner support chuck 4, at this time, the bearing hole of the wheel rim 3 is inserted and matched with the pneumatic inner support chuck 4 by continuously moving the wheel rim 3 by the moving platform 6, and the pneumatic inner support chuck 4 is started to tightly support the inner wall of the bearing hole of the wheel rim 3, at the same time, the multi-jaw chuck 1 is used to tightly support the inner wall of the wheel rim of the wheel rim 3, under the double support of the multi-jaw chuck 1 and the pneumatic inner support chuck 4, the wheel rim 3 is stably fixed, then the axial locking piece 5 is used to further limit the wheel rim 3, and the positioning stability is improved.

[0026] In an embodiment, the axial locking piece 5 includes a connecting thread 51 arranged at the end of the expansion sleeve 8 of the pneumatic inner support chuck 4 and a top cover 52 in threaded connection with the connecting thread 51.

[0027] When the wheel rim 3 is inserted on the pneumatic inner support chuck 4, the expansion sleeve 8 directly abuts against the inner wall of the bearing hole of the wheel rim 3, the pneumatic inner support chuck 4 is started, the expansion sleeve 8 is externally supported under pressure, thereby tightly abutting against the inner wall of the bearing hole of the wheel rim 3, and the preliminary positioning of the wheel rim 3 is realized, at this time, the top cover 52 is screwed with the connecting thread 51 until the top cover 52 tightly abuts against the end surface of the bearing hole, and the further positioning of the wheel rim 3 in the axial direction is realized.

[0028] It is worth explaining that the pneumatic inner support chuck 4 belongs to mature prior art, and the expansion sleeve 8 belongs to the component part of the pneumatic inner support chuck 4, only the end of the expansion sleeve 8 is processed by screw thread, without too much change, therefore, the detailed structure and working principle of the pneumatic inner support chuck 4 are not described too much.

[0029] In an embodiment, the top cover 52 is fixedly provided with a hexagonal column 9 at the unopened end, the hexagonal column 9 is coaxial with the top cover 52, and the diagonal distance of the hexagonal column 9 is less than the diameter of the top cover 52.

[0030] Since the top cover 52 needs to be screwed with the connecting thread 51 and abut against the end surface of the bearing hole of the wheel rim 3, the diameter of the top cover 52 must be greater than the diameter of the bearing hole of the wheel rim 3, exceeding the clamping range of a conventional wrench, and it is difficult for the operator to tighten the top cover 52, by this design, the operator can easily clamp the hexagonal column 9 by using a conventional wrench, and the top cover 52 is rotated by rotating the hexagonal column 9, which is convenient for disassembling and assembling the top cover 52.

[0031] In an embodiment, the moving platform 6 includes a bottom plate 61, a plurality of directional rollers 62 rotatably arranged at the bottom of the bottom plate 61, and guide members 63 arranged at both sides of the bottom plate 61, the rolling directions of the directional rollers 62 and the guiding directions of the guide members 63 are parallel to the axis of the multi-jaw chuck 1.

[0032] In this way, the bottom plate 61 can be moved by applying a certain pushing force to the bottom plate 61 along the rolling direction of the directional roller 62. Although the directional roller 62 provides a certain guiding effect for the movement of the bottom plate 61, the accuracy is low, and the directional roller 62 is prone to relative sliding with the ground, which finally leads to the difficulty in aligning the bearing hole of the wheel rim 3 with the pneumatic inner supporting chuck 4. Therefore, the guide 63 is additionally arranged to further guide the movement of the bottom plate 61, so as to ensure the alignment accuracy of the wheel rim 3 and the pneumatic inner supporting chuck 4.

[0033] In an embodiment, the guide 63 comprises guide rods 631 fixedly arranged on the ground and located on both sides of the bottom plate 61, and linear bearings 632 fixedly arranged on both sides of the bottom plate 61 and sleeved on the guide rods 631, the guide rods 631 being parallel to the axis of the multi-jaw chuck 1.

[0034] In this way, the bottom plate 61 drives the linear bearings 632 to move when moving, and the sleeving effect of the guide rods 631 and the linear bearings 632 provides a guide for the movement of the bottom plate 61, and the friction between the linear bearings 632 and the guide rods 631 is small, so that the movement of the bottom plate 61 is more accurate and smooth.

[0035] In an embodiment, the lifting support assembly 7 comprises two pneumatic telescopic rods 71 symmetrically arranged on the bottom plate 61 according to the axis of the multi-jaw chuck 1, a support plate 72 fixedly arranged on the top of the two pneumatic telescopic rods 71, and a clamping groove 73 opened on the support plate 72 and used for clamping the wheel rim 3.

[0036] In this way, the wheel rim 3 is placed on the support plate 72 and clamped with the clamping groove 73, so that the wheel rim 3 is stably supported and is not prone to shaking or deviation during the telescoping process of the pneumatic telescopic rod 71 and the movement process of the moving platform 6. The telescoping of the pneumatic telescopic rod 71 can drive the support plate 72 to lift, so as to realize the adjustment of the height of the wheel rim 3 on the support plate 72.

[0037] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0038] It should be noted that if the embodiment of the utility model has directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, if the specific posture changes, the directionality indication also changes accordingly.

[0039] In addition, "multiple" refers to two or more. In addition, the technical solutions among various embodiments can be combined with each other, but must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of such technical solutions does not exist, nor is it within the protection scope required by the utility model.

Claims

1. A rail vehicle wheel rim machining clamping assembly, characterized by, The utility model relates to a multi-jaw chuck (1) is fixedly arranged on the rotating main shaft of machine tool (2) and is used for the radial support of the inner wall of the rim of wheel rim (3), a pneumatic inner support chuck (4) is coaxially arranged on the multi-jaw chuck (1) and is used for the radial support of the bearing hole of wheel rim (3), the pneumatic inner support chuck (4) is circumscribed high-pressure gas source, axial locking member (5) is arranged on the pneumatic inner support chuck (4) and is used for further limiting the axial movement of wheel rim (3) on the pneumatic inner support chuck (4), a mobile platform (6) is arranged on the ground, and the lifting support assembly (7) for supporting wheel rim (3) is arranged on the mobile platform (6). The axial locking member (5) includes connecting thread (51) arranged at the end of the sleeve (8) of the pneumatic inner support chuck (4) and cap (52) screwed with the connecting thread (51). The cap (52) is fixedly provided with a hexagonal column (9) at the end without opening, the hexagonal column (9) is coaxial with the cap (52), and the diagonal distance of the hexagonal column (9) is less than the diameter of the cap (52). The mobile platform (6) includes a bottom plate (61), a plurality of directional rollers (62) rotatably arranged at the bottom of the bottom plate (61) and guide members (63) arranged on both sides of the bottom plate (61), the rolling direction of the directional rollers (62) and the guide direction of the guide members (63) are parallel to the axis of the multi-jaw chuck (1). The guide member (63) includes guide rods (631) fixedly arranged on the ground and located on both sides of the bottom plate (61) and linear bearings (632) fixedly arranged on both sides of the bottom plate (61) and sleeved on the guide rods (631), the guide rods (631) are parallel to the axis of the multi-jaw chuck (1).

2. The rail vehicle wheel rim machining clamp assembly of claim 1, wherein, The lifting support assembly (7) includes two pneumatic telescopic rods (71) symmetrically arranged on the bottom plate (61) according to the axis of the multi-jaw chuck (1), a support plate (72) fixedly arranged at the top of the two pneumatic telescopic rods (71) and a clamping groove (73) opened on the support plate (72) and used for clamping the wheel rim (3).

3. The rail vehicle wheel rim machining clamp assembly of claim 2, wherein, ​ 4. The rail vehicle wheel rim machining clamp assembly of claim 3, wherein, ​ 5. The rail vehicle wheel rim machining clamp assembly of claim 4, wherein, ​ 6. The rail vehicle wheel rim machining clamp assembly of claim 5, wherein, ​

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