CN215393656U

CN215393656U - Device is screwed up to car control arm screw bush

Info

Publication number: CN215393656U
Application number: CN202121809925.2U
Authority: CN
Inventors: 郭建东; 刘金伟; 王朋超; 于宁; 孙海超; 杨科慧; 李振宇; 王博; 胡广旭; 王山
Original assignee: CITIC Dicastal Co Ltd
Current assignee: CITIC Dicastal Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-04
Anticipated expiration: 2031-08-05

Abstract

The utility model relates to a device for screwing a threaded bush of an automobile control arm, which consists of a rack, a servo motor, a motor support, a flat key, a spline shaft, a spring, a spline shaft sleeve, an end cover, an inner hexagonal sleeve, a locking bolt and a pressing plate. The utility model can meet the screwing requirement of the threaded bushing of the automobile control arm.

Description

Device is screwed up to car control arm screw bush

Technical Field

The utility model relates to a tightening device, in particular to a tightening device for a threaded bushing of an automobile control arm.

Background

The automobile control arm is used as a guide and force transmission element of an automobile suspension system, transmits various forces acting on the wheels to an automobile body, and meanwhile ensures that the wheels move according to a certain track.

On an automobile control arm made of aluminum alloy, in order to ensure that the stress part or individual important part of the control arm has higher strength and more reliable stress, a metal thread bushing is generally screwed into the stress part, meanwhile, the tightening torque of the metal thread bushing is specified, and the common calibrated tightening torque range is generally 450 and 650 Nm.

Fig. 1 is a threaded bushing, and it can be seen that the large end of the threaded bushing is in a hexagonal prism structure, the small end of the threaded bushing is in a threaded structure, and a threaded through hole is formed in the middle of the threaded bushing.

The conventional method, namely manually operating a torque wrench, clamps the torque wrench at the large end of the threaded bushing, and screws the threaded bushing into the threaded hole of the control arm. When the torque wrench reaches a predetermined torque, the operation is stopped. This method, although seemingly simple, in practice, applying a tightening torque of 400 Nm and 600Nm is very laborious for manual operation, even with the use of an elongated lever. Workers operate the lengthened lever repeatedly, and the efficiency is extremely low; the applied torque exceeds the normal physical limit, and the labor intensity of workers is high; the working state is unstable, and the torque control error is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a screwing device for a threaded bushing of an automobile control arm.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the utility model provides a device is screwed up to car control arm screw bush, by the frame, servo motor, the motor support, the parallel key, the integral key shaft, a spring, the spline shaft sleeve, the end cover, interior hexagonal sleeve, the locking bolt, the clamp plate is constituteed, the motor support passes through the fix with screw in the frame, servo motor installs on the motor support, the integral key shaft left end passes through the parallel key and couples with servo motor, and fasten with holding screw, the integral key shaft right-hand member couples with the spline shaft sleeve, and it is spacing with the end cover, the end cover couples with the integral key shaft with the screw, the spring housing is on the integral key shaft, interior hexagonal sleeve passes through the screw and couples with the spline shaft sleeve, the interior hexagonal sleeve outside is groove structure, there is the locating pin in the middle of the recess, be convenient for place the screw bush, the locking bolt is fixed in the frame, the clamp plate plays the effect that compresses tightly car control arm.

Before the automobile control arm is used, the automobile control arm is firstly placed on a rack and is tightly pressed through a locking bolt and a pressing plate; then place the screw bush on hexagonal sleeve inside, at this moment, under the effect of spring, the spring can promote spline axle sleeve, hexagonal sleeve forward motion inside, makes the screw bush support the screw hole front end at car control arm.

The servo motor is started, the servo motor can drive the spline shaft, the spline shaft sleeve and the inner hexagonal sleeve to slowly rotate, and the threaded bushing can be screwed into a threaded hole of the automobile control arm in the rotating process.

With the continuous screwing of the threaded bushing, the magnitude of the screwing torque can be calculated at any time by monitoring the control parameters (voltage and current) of the servo motor. When the specified tightening torque is reached, the operation can be stopped.

The utility model can meet the requirement of screwing the threaded bushing of the automobile control arm and has the characteristics of simple structure, reliable operation and real-time display of the screwing torque.

Drawings

Fig. 1 is a schematic view of a threaded bushing.

Fig. 2 is a front view of a vehicle control arm threaded bushing tightening device of the present invention.

Fig. 3 is a plan view of a screw bushing tightening device for an automotive control arm according to the present invention (in a state where the screw bushing is not yet screwed).

Fig. 4 is a schematic view showing a state in which a threaded bush of a threaded bush tightening apparatus for an automobile control arm of the present invention is fully tightened.

Fig. 5 is a sectional view a-a of a vehicle control arm threaded bushing tightening device of the present invention.

Fig. 6 is a cross-sectional view B-B of a vehicle control arm threaded bushing tightening device of the present invention.

Detailed Description

The details and operation of the particular apparatus proposed according to the present invention are explained in detail below with reference to the accompanying drawings.

A device for screwing a threaded bush of an automobile control arm comprises a frame 1, a servo motor 2, a motor support 4, a flat key 6, a spline shaft 7, a spring 8, a spline shaft sleeve 9, an end cover 11, an inner hexagonal sleeve 13, a locking bolt 14 and a pressure plate 15, wherein the motor support 4 is fixed on the frame 1 through a screw 3, the servo motor 2 is arranged on the motor support 4, the left end of the spline shaft 7 is connected with the servo motor 2 through the flat key 6, the automobile control arm is fastened by a set screw 5, the right end of the spline shaft 7 is connected with a spline shaft sleeve 9 and limited by an end cover 11, the end cover 11 is connected with the spline shaft 7 by a screw 10, a spring 8 is sleeved on the spline shaft 7, an inner hexagonal sleeve 13 is connected with the spline shaft sleeve 9 through a screw 12, the outer side of the inner hexagonal sleeve 13 is of a groove structure, a positioning pin is arranged in the middle of a groove, a threaded bush 16 is convenient to place, a locking bolt 14 is fixed on the rack 1, and a pressing plate 15 plays a role in pressing an automobile control arm 17.

Before use, the automobile control arm 17 is firstly placed on the frame 1 and is pressed tightly through the locking bolt 14 and the pressure plate 15; then the threaded bush 16 is placed on the inner hexagonal sleeve 13, at this time, under the action of the spring 8, the spring 8 pushes the spline shaft sleeve 9 and the inner hexagonal sleeve 13 to move forwards, so that the threaded bush 16 is abutted against the front end of the threaded hole of the automobile control arm 17.

When the servo motor 2 is started, the servo motor 2 drives the spline shaft 7, the spline shaft sleeve 9 and the inner hexagonal sleeve 13 to slowly rotate, and in the rotating process, the threaded bushing 16 is screwed into a threaded hole of the automobile control arm 17.

As the threaded bush 16 is screwed in, the magnitude of the tightening torque is calculated from time to time by monitoring the control parameters (voltage, current) of the servomotor 2. When the specified tightening torque is reached, the operation can be stopped.

Fig. 3 shows a state in which the threaded bushing 16 abuts against the front end of the threaded hole of the vehicle control arm 17 and is not yet screwed, and fig. 4 shows a state in which the threaded bushing 16 is completely screwed.

Claims

1. The utility model provides a device is screwed up to car control arm screw bush comprises frame (1), servo motor (2), motor support (4), parallel key (6), integral key shaft (7), spring (8), spline shaft sleeve (9), end cover (11), interior hexagonal sleeve (13), locking bolt (14), clamp plate (15), its characterized in that: motor support (4) are fixed in frame (1), install on motor support (4) servo motor (2), integral key shaft (7) left end is through parallel key (6) and servo motor (2) hookup, integral key shaft (7) right-hand member and spline shaft sleeve (9) hookup, and spacing with end cover (11), end cover (11) and integral key shaft (7) hookup, spring (8) cover is on integral key shaft (7), interior hexagonal sleeve (13) and spline shaft sleeve (9) hookup, the interior hexagonal sleeve (13) outside is groove structure, there is the locating pin in the middle of the recess, be convenient for place threaded bush (16), locking bolt (14) are fixed in frame (1), clamp plate (15) compress tightly car control arm (17).