CN202701855U

CN202701855U - Upward operation inner centering mechanism

Info

Publication number: CN202701855U
Application number: CN 201220271535
Authority: CN
Inventors: 常力; 宫平
Original assignee: Changchun Railway Vehicles Co Ltd
Current assignee: CRRC Changchun Railway Vehicles Co Ltd
Priority date: 2012-06-11
Filing date: 2012-06-11
Publication date: 2013-01-30
Anticipated expiration: 2022-06-11

Abstract

An upward operation inner centering mechanism is characterized by comprising a guide base seat, positioning blocks, a sliding wedge, an adjusting screw nut and an adjusting lead screw. The guide base seat is of cavity structure and two sides of the guide base seat are symmetrical to each other. The positioning blocks are arranged in two cavities of the guide base seat, and can be reset through a reset spring arranged inside the guide base seat. The adjusting lead screw is arranged at the center of the guide base seat, and the sliding wedge is arranged on the adjusting lead screw in a sleeved mode and is matched with wedge-shaped surfaces of the positioning blocks at two sides. A wedge reset spring is arranged below the sliding wedge, and an installing centering line is arranged on the side of the guide base seat. When the upward operation inner centering mechanism is used for positioning a workpiece, the upward operation inner centering mechanism adopts the theoretical encterline as the locating datum. By the screwing of an adjusting screw nut and the effect of the reset spring, the upward operation inner centering mechanism enables the sliding wedge to move up and down, and therefore enables the positioning blocks on two sides to extend outward and contract inward simultaneously under the joint action of the sliding wedge and the positioning blocks. The upward operation inner centering mechanism is convenient and reliable to operate, enables the theoretical centerline to coincide with a clamping-tool centerline, avoids the center-offset problem generated by a fixed size positioning block group, and locates a position of the workpiece and simultaneously clamps the workpiece.

Description

Upper operation concentric mechanism decided at the higher level but not officially announced

Technical field

The utility model relates to a kind of mechanism of centralized positioning, especially relates to a kind of upper operation concentric mechanism decided at the higher level but not officially announced.

Background technology

In railway passenger car bogie framework welding and processing and manufacturing, often can run into the situation that workpiece needs centralized positioning, as the curb girder group to the time the lower cover location, the framework group to the time two curb girders locate, framework adds location on the lathe table top in man-hour etc.At present the fixed dimension locating piece is used also very generally in the relevant anchor clamps, but usually can cause that truck side sill is eccentric, becomes the eccentric phenomenon such as parallelogram behind the framework assembly welding, affects the workmanship of bogie.Because the foozle of curb girder lower cover or curb girder itself is inevitable, soldering group to the time with the locating piece of fixed dimension location lower cover, be that single face is located or dual contact all can't make anchor clamps center line and curb girder lower cover central lines, theoretical error is very large.

The utility model content

The purpose of this utility model be for bogie frame curb girder group to anchor clamps, framework group to generally adopting fixed dimension locating piece location in anchor clamps and the framework clamp for machining, even see line aiming group to and cause locating inaccurate problem, a kind of centering machine that is installed in the anchor clamps is provided, can find out automatically and accurately workpiece centre and finish simultaneously the location and clamping, and then improve the workmanship of bogie.

For achieving the above object, the utility model provides a kind of upper operation concentric mechanism decided at the higher level but not officially announced, it is characterized in that: comprise guide seats, locating piece, sliding wedge, adjusting nut, adjusting screw, guide seats is the cavity structure of both sides symmetry, locating piece is arranged in two cavitys of guide seats, and reset by the back-moving spring in the guide seats, adjusting screw is fixed on the center of guide seats, sliding wedge is enclosed within on the adjusting screw and cooperates with the lozenges of both sides locating piece, be provided with the voussoir back-moving spring below the sliding wedge, the guide seats side is with the mounting center line.

It is that theoretical centerline take workpiece is as positioning datum that the utility model is used for when workpiece positions, by screwing adjusting nut and under the effect of voussoir back-moving spring, sliding wedge is moved up and down, thereby make the both sides locating piece simultaneously overhanging and inside contract under the shared effect of sliding wedge and locating piece back-moving spring, convenient and reliable operation, make workpiece theoretical centerline and anchor clamps central lines, avoid the eccentricity issues of fixed dimension locating piece group to producing, possessed the Workpiece clamping function in the time of the location.

Description of drawings

Fig. 1 is stereogram of the present utility model;

Fig. 2 is cutaway view of the present utility model.

The specific embodiment

See figures.1.and.2; the utility model comprises guide seats 1; locating piece 2; sliding wedge 4; adjusting nut 5; adjusting screw 6; guide seats is the cavity structure of both sides symmetry; it is the basic component of this centering machine; play location and installation and guide effect; locating piece is arranged in two cavitys of guide seats; and reset by the back-moving spring 9 in the guide seats; adjusting screw is fixed on the center of guide seats, and sliding wedge is enclosed within on the adjusting screw and cooperates with the lozenges of both sides locating piece, is provided with voussoir back-moving spring 8 below the sliding wedge; the guide seats side is with mounting center line 7; the 3rd, loam cake prevents that locating piece from coming off, and protection slipper cleaning.

When installing and using, make mounting center line and the anchor clamps central lines of centering machine, when clockwise or when being rotated counterclockwise adjusting nut, two locating pieces outwards eject and inwardly retraction synchronously.Two locating piece end faces will hold out against two locating surfaces of (and mobile) curb girder lower cover when outwards ejecting simultaneously, when the curb girder lower cover stops mobile (two locating surfaces are held out against state), then curb girder lower cover center will with the anchor clamps center superposition, thereby the purpose that reaches precision centering and clamp.Rotate adjusting nut when group to finishing backward negative side, the clamping complete operation is unclamped in the two location inside retractions in termination simultaneously.

Claims

1. one kind upward operates concentric mechanism decided at the higher level but not officially announced, it is characterized in that: comprise guide seats, locating piece, sliding wedge, adjusting nut, adjusting screw, guide seats is the cavity structure of both sides symmetry, locating piece is arranged in two cavitys of guide seats, and reset by the back-moving spring in the guide seats, adjusting screw is fixed on the center of guide seats, sliding wedge is enclosed within on the adjusting screw and cooperates with the lozenges of both sides locating piece, be provided with the voussoir back-moving spring below the sliding wedge, the guide seats side is with the mounting center line.