CN219581702U

CN219581702U - Clamp for light rail axle box

Info

Publication number: CN219581702U
Application number: CN202320320113.4U
Authority: CN
Inventors: 周鹏
Original assignee: Jinzhou Jietong Railway Machinery Co ltd
Current assignee: Jinzhou Jietong Railway Machinery Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-08-25
Anticipated expiration: 2033-02-27

Abstract

The utility model discloses a clamp for a light rail axle box, which comprises: the base plate is fixed on the main shaft of the numerical control vertical lathe; the three-jaw chuck is fixed in the middle of the substrate and is movably connected with a plurality of clamping jaws for clamping the axle box; the auxiliary supports are respectively fixed on the base plate, each auxiliary support is provided with a support head, and the support heads are respectively abutted with the bottom of the axle box; the limiting seats are provided with a plurality of groups and are respectively fixed on the base plate, the limiting seats are horizontally connected with extrusion heads, and the extrusion heads are in butt joint with the support arms of the axle boxes; the pressing seats are provided with a plurality of groups and are respectively fixed on the base plate, the plurality of groups of pressing seats are distributed on the periphery side of the three-jaw chuck, the plurality of groups of pressing seats are respectively provided with pressing plates, the plurality of pressing plates are respectively abutted with the top of the axle box, and the plurality of pressing plates are respectively in one-to-one correspondence with the upper and lower positions of the plurality of supporting heads; balancing weight fixed connection balances the rotation centrifugal force of base plate on the base plate, this novel simple structure, processing quality is high, convenient to use.

Description

Clamp for light rail axle box

Technical Field

The utility model belongs to the field of machining of railway passenger car parts, and particularly relates to a clamp for a light rail axle box.

Background

The axle box device is a part for connecting a wheel pair and a bogie frame or a two-axle car body on a railway locomotive, namely an axle box. The wheel set is used for transmitting the weight and load of the vehicle body to the wheel set, lubricating the axle journal, reducing friction and reducing running resistance. The axle box is used for connecting the wheel pair with the side frame or the framework, so that the rolling of the wheel pair along the steel rail is converted into the translation of the vehicle body, and the weight transmission acting force of the vehicle is born.

The axle box is the most important component part in the railway passenger car, and is the key for ensuring the efficient and stable operation of the railway passenger car. The conventional axle box fixing processing method generally needs to be subjected to the processes of scribing rough processing, fixing processing standard and the like, and the process is complex and tedious. Due to the complex operation, there is also a high requirement on the level of operation of the worker. In addition, the current common processing mode has more processing procedures, so that the clamping needs to be carried out for multiple times, and the processing cost is greatly increased. Meanwhile, the common clamping mode can cause the problems of poor processing quality, non-uniform size specification, low processing precision, low efficiency, long auxiliary time, complex operation and the like, and seriously affects the service performance and the safety of products.

Chinese patent CN202121971602.3 discloses a tooling fixture for axle boxes of railway carriages, which is efficient in clamping, but the machining is completed in a vertical machining center, and a pressing plate presses around the hole, so that the roundness of the hole is not very good, and the assembly and long-time operation quality of the subsequent axle boxes are affected.

Therefore, how to provide a clamp for a light rail shaft box is a problem that needs to be solved by a person skilled in the art.

Disclosure of Invention

In view of the above, the utility model provides the clamp for the light rail shaft box, which is simple and convenient to use, ensures that the wall thickness of the bearing hole after processing is uniform, and can realize finish machining operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a clamp for a light rail axle housing, comprising:

the base plate is fixed on the spindle of the numerical control vertical lathe;

the three-jaw chuck is fixed in the middle of the substrate and is movably connected with a plurality of clamping jaws for clamping the axle box;

the auxiliary supports are multiple and are respectively fixed on the base plate, supporting heads are arranged on the auxiliary supports, and the multiple supporting heads are respectively abutted to the bottoms of the axle boxes;

the limiting seats are provided with a plurality of groups and are respectively fixed on the base plate, the limiting seats are horizontally connected with extrusion heads, and the extrusion heads are in butt joint with the support arms of the axle boxes;

the pressing seats are provided with a plurality of groups and are respectively fixed on the base plate, the plurality of groups of pressing seats are distributed on the periphery side of the three-jaw chuck, the plurality of groups of pressing seats are respectively provided with pressing plates, the plurality of pressing plates are respectively abutted with the top of the axle box, and the plurality of pressing plates are respectively in one-to-one correspondence with the upper and lower positions of the plurality of supporting heads;

the balancing weight is fixedly connected to the base plate and balances the rotation centrifugal force of the base plate.

The beneficial effects of the utility model are as follows: utilize the clamping jaw on the three-jaw chuck to fix a position the axle box cavity, a plurality of clamping jaws play the lock and die to protect the work piece and at the rotatory in-process centrifugal force that leads to the fact to the work piece not hard up and displacement, and auxiliary stay effectively increases the stability when the work piece adds the work piece, can prevent the vibrations of work piece when processing, compresses tightly the clamp plate cooperation auxiliary stay on the seat and realizes the accurate fixed of work piece, and this novel anchor clamps cramp power distributes rationally in the spatial direction, and the clamp plate provides clamping pressure with the supporting head upper and lower position one-to-one on the auxiliary stay, prevents that the work piece from taking place deformation because of the pressure.

Preferably, the base plate is of a disc structure, a plurality of bolt holes are formed in the base plate, and a plurality of hanging rings are fixedly connected to the periphery of the top of the base plate.

Preferably, the substrate is fixedly connected with a clamping jaw tightness adjusting mechanism, and an adjusting screw of the clamping jaw tightness adjusting mechanism adjusts tightness positions of the clamping jaws.

Preferably, the limit seats are two groups and distributed on two sides of the three-jaw chuck, and the auxiliary supports and the limit seats are arranged close to each other in a one-to-one correspondence manner.

Preferably, the auxiliary support is a shockproof jack, and the ejection end of the shockproof jack is fixedly connected with a support head.

Drawings

FIG. 1 is a schematic view of the overall structure of a clamp for a light rail axle box according to the present utility model;

fig. 2 is a schematic diagram of an application of the clamp for a light rail axle box of the present utility model.

The device comprises a substrate 1, a three-jaw chuck 2, clamping jaws 3, an auxiliary support 4, a limit seat 5, a compression seat 6, an extrusion head 7, a pressing plate 8, a balancing weight 9, a lifting ring 10, an elastic adjusting mechanism 11, an adjusting screw 111 and a shaft box 12.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 2 of the drawings, a clamp for a light rail shaft housing according to an embodiment of the present utility model includes:

the base plate 1, the base plate 1 is fixed on a main shaft of the numerical control vertical lathe;

the three-jaw chuck 2, the three-jaw chuck 2 is fixed in the middle of the base plate 1, and the three-jaw chuck 2 is movably connected with three clamping jaws 3 for clamping the axle box 12;

the auxiliary supports 4 are three and are respectively fixed on the base plate 1, the auxiliary supports 4 are respectively provided with supporting heads, and the supporting heads are respectively abutted with the bottoms of the axle boxes 12;

the limiting seats 5 are two groups and are respectively fixed on the base plate 1, the limiting seats 5 are horizontally connected with the extrusion heads 7, and the extrusion heads 7 are abutted with the support arms of the axle boxes 12;

the pressing seats 6 are respectively fixed on the base plate 1, the pressing seats 6 are distributed on the outer periphery side of the three-jaw chuck 2, pressing plates 8 are respectively arranged on the pressing seats 6, the pressing plates 8 are respectively abutted with the tops of the axle boxes 12, the pressing plates are respectively in one-to-one correspondence with the upper and lower positions of the supporting heads, point-to-point pressure is provided, and deformation of a workpiece is prevented;

the balancing weight 9 is fixedly connected to the base plate 1 to balance the rotation centrifugal force of the base plate, and machining errors of workpieces caused by eccentricity are prevented.

In other embodiments, the base plate 1 is in a disc structure, and a plurality of bolt holes are formed in the base plate 1 to realize the connection of the three-jaw chuck 2, the auxiliary support 4, the limiting seat 5, the compressing seat 6 and the balancing weight 9 with the base plate 1; a plurality of hanging rings 10 are fixedly connected to the periphery of the top of the base plate 1, and the installation is convenient.

In other embodiments, the base plate 1 is fixedly connected with a clamping jaw tightness adjusting mechanism 11, and an adjusting screw 111 of the clamping jaw tightness adjusting mechanism 11 adjusts tightness positions of the clamping jaws 3.

The three-jaw chuck clamps the workpiece by utilizing the principle that any one of three bevel gears on the rotation circumference of a chuck wrench drives the planar threads to rotate and drives three clamping jaws to move together, thereby playing a role in self-centering clamping the workpiece.

In other embodiments, the limiting seats 5 are two groups and distributed on two sides of the three-jaw chuck 2, and the auxiliary supports 4 and the limiting seats 5 are arranged close to each other in a one-to-one correspondence manner.

In other embodiments, the auxiliary support 4 is a vibration-proof jack, and the ejection end of the vibration-proof jack is fixedly connected with a support head.

Original processing is accomplished in vertical machining center, and the clamp plate presses around the hole, leads to the circularity of hole not fine, and this novel vertical lathe processing that changes uses special fixture, and three clamp plates keep away from the hole on the anchor clamps, fine solution centre of a circle poor this problem, satisfies production.

The fixture is used for processing the inner core area of a cavity, which relates to an important part axle box in a train bogie. The fixture is used for a vertical numerical control lathe, and is designed for clamping a workpiece which is a machining datum plane with a casting appearance and is not accurate. The clamp is reasonably distributed in the space direction of the clamping force, realizes point-to-point opposite pressing under downward force, and prevents the deformation of the workpiece due to the pressure;

three clamping jaws in the clamp are used for locking and protecting the loosening and displacement of the workpiece caused by centrifugal force in the machining rotation; the stability of the two sides auxiliary stay during effectual increase work piece processing plays shockproof effect, and three clamping jaw not only can guarantee the wall thickness degree of consistency of bearing hole after the processing, has still improved the machining efficiency of work piece, and anchor clamps simple to use are convenient. When the workpiece rotates, the accurate balancing weight is arranged on the clamp, so that errors caused by centrifugal force on the workpiece during machining are avoided, and the machining quality of a product is greatly improved.

The specific using process comprises the following steps:

as shown in fig. 2, a balancing weight 9 is arranged on a base plate 1, and a pressing seat 6 and an extrusion head 7 thereon are used for side extrusion fixation of a workpiece and a tool;

after the workpiece is placed on the 2-jaw chuck, the clamping jaw 3 is used for clamping; after clamping, the clamping device is further fixed by using a tightness adjusting structure 11, then two auxiliary supports 4 are jacked up, and finally three pressing plates 8 are pressed tightly, so that normal cutting can be performed.

The tool solves the problem of deformation of the prior tool hole, the machined hole has no ellipse, and the cylindricity and the roundness are both within 0.01 mm.

For the device and the use method disclosed in the embodiments, since the device and the use method correspond to the method disclosed in the embodiments, the description is relatively simple, and the relevant places refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A light rail axle box clamp, comprising:

the base plate is fixed on the spindle of the numerical control vertical lathe;

2. The fixture for a light rail shaft box according to claim 1, wherein the base plate is of a disc structure, a plurality of bolt holes are formed in the base plate, and a plurality of hanging rings are fixedly connected to the periphery of the top of the base plate.

3. The fixture for a light rail axle box according to claim 2, wherein the base plate is fixedly connected with a clamping jaw tightness adjusting mechanism, and an adjusting screw of the clamping jaw tightness adjusting mechanism adjusts tightness positions of a plurality of clamping jaws.

4. The fixture for the light rail axle box according to claim 1, wherein the limiting seats are two groups and distributed on two sides of the three-jaw chuck, and the auxiliary supports and the limiting seats are arranged close to each other in a one-to-one correspondence manner.

5. The fixture for a light rail axle box according to claim 4, wherein the auxiliary support is a vibration-proof jack, and a supporting head is fixedly connected to an ejection end of the vibration-proof jack.