A torsion bar calibration device for an automotive electric power steering gear

Abstract

This utility model discloses a torsion bar calibration device for an automotive electric power steering system. It includes a clamping station, a testing station, and a calibration station mounted on a machine base. The testing station and calibration station are located on opposite sides of the clamping station. The clamping station includes a rotatable fixture driven by a motor. The testing station includes a mounting platform that can slide along the axial direction of the fixture, with a displacement sensor mounted at its front end. The calibration station includes a platform that can slide radially along the fixture, with a straightening head at its front end. The straightening head includes two spaced-apart rotating bearings. This utility model, with its clamping, testing, and calibration stations, clamps the torsion bar at the clamping station, detects its runout at the testing station to quickly determine if the torsion bar is qualified, and straightens any unqualified torsion bars at the calibration station. This achieves highly efficient calibration of the torsion bar input shaft.

Description

Technical Field

[0001] This utility model relates to the field of torsion bar processing technology, specifically a torsion bar calibration device for automotive electric power steering systems. Background Technology

[0002] There are several methods for straightening shafts, including: Twisting method: Twisting or striking the shaft manually or mechanically to adjust its bending or twisting state. Local heating method: Localizing heating of specific parts of the shaft to induce compression deformation, thereby achieving straightening. Thermomechanical method: Utilizing a combination of heat and mechanical action, straightening the shaft through heating and mechanical deformation. Stress relaxation method: Controlling the stress relaxation process of the shaft material at a specific temperature to restore its original straightness or reduce bending.

[0003] Existing technology uses a first type of shaft to twist or strike to straighten it by adjusting the bending or twisting state of the shaft. Because it relies entirely on manual skills, the production efficiency is not high, and the straightening level is also inconsistent. Utility Model Content

[0004] The purpose of this invention is to provide a torsion bar calibration device for an electric power steering system for automobiles, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a torsion bar calibration device for an electric power steering system for automobiles, comprising a clamping station, a testing station, and a calibration station set on a machine tool;

[0006] The testing station and calibration station are located on opposite sides of the clamping station;

[0007] The clamping station includes a rotatable fixture driven by a motor;

[0008] The inspection station includes a mounting platform that can slide along the axis of the tooling, and a displacement sensor is installed at the front end of the mounting platform;

[0009] The calibration station includes a platform that can slide radially along the tooling. A straightening head is provided at the front end of the platform, and the straightening head includes two rotating bearings installed at intervals.

[0010] Preferably, the motor is installed at the rear end of the clamping station, and the tooling uses a chuck fixture installed at the output end of the motor.

[0011] Preferably, the testing station includes a first base plate mounted on the machine platform, a first slide rail and a manual lead screw mounted on the first base plate, the first slide rail and the manual lead screw being parallel to each other, and a handwheel being fixedly connected to the end of the manual lead screw;

[0012] It also includes a transition bracket, the bottom of which is equipped with a lead screw nut and connected to a manual lead screw drive. The transition bracket is also slidably connected to the first slide rail.

[0013] Preferably, a cylinder is installed on the transition bracket, the output end of the cylinder is connected to the mounting platform, and the mounting platform is slidably connected to the transition bracket.

[0014] Preferably, the calibration station includes a second base plate fixedly mounted on the machine base, on which an electric lead screw and a second slide rail are mounted. The stage is slidably connected to the second slide rail and is driven by the electric lead screw through a threaded component.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention includes a clamping station, a testing station, and a calibration station. The clamping station holds the torsion bar, the testing station detects the torsion bar's runout to quickly determine if the torsion bar is qualified, and the calibration station straightens any unqualified torsion bars. This achieves highly efficient calibration of the torsion bar input shaft. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 As shown, it includes a clamping station, a testing station, and a calibration station set on the machine.

[0022] The testing station and calibration station are located on opposite sides of the clamping station;

[0023] The clamping station includes a rotatable fixture 3 driven by a motor; a motor 11 is installed at the rear end of the clamping station, and the fixture adopts a chuck clamp, which is installed at the output end of the motor 11.

[0024] The inspection station includes a mounting platform 8 that can slide along the axial and radial directions of the tooling 3. A displacement sensor 1 is installed at the front end of the mounting platform 8. The inspection station includes a first base plate 10 installed on the machine base. A first slide rail 101 and a manual lead screw 71 are installed on the first base plate 10. The first slide rail 101 and the manual lead screw 71 are parallel to each other. A handwheel 7 is fixedly connected to the end of the manual lead screw 71.

[0025] It also includes a transition bracket 83, with a lead screw nut 81 installed at the bottom of the transition bracket 83, which is connected to the manual lead screw 71 for transmission. The transition bracket 83 is also slidably connected to the first slide rail 101. A cylinder 82 is installed on the transition bracket 83, and the output end of the cylinder 82 is connected to the mounting platform 8, which is slidably connected to the transition bracket 83.

[0026] by Figure 3 For example, by rotating the handwheel 7, the manual lead screw 71 rotates, causing the mounting platform to slide inside and outside, and the cylinder 82 drives the mounting platform to slide left and right.

[0027] The calibration station includes a platform 4 that can slide radially along the fixture. A straightening head 2 is located at the front end of the platform 4, and the straightening head 2 includes two spaced-apart rotating bearings. The calibration station also includes a second base plate 6 fixedly mounted on the machine base. An electric lead screw 51 and a second slide rail 61 are mounted on the second base plate 6. The platform 4 is slidably connected to the second slide rail 61 and is also connected to the electric lead screw 51 via a threaded component 41. The electric lead screw 51 is driven by a drive motor 5.

[0028] In use, the torsion bar is first clamped in a chuck fixture. The detection end of the displacement sensor 1 is pushed to the circumferential surface of the torsion bar by cylinder 82, and motor 11 is turned on, causing the chuck to rotate the torsion bar at a low speed around its own axis. Simultaneously, handwheel 7 is manually operated to move the displacement sensor 1 along the axial direction of the torsion bar. The displacement sensor is connected to the main unit via an electrical signal. The main unit records the sensor data during the detection process to determine the amount of runout on the circumferential surface of the torsion bar.

[0029] When straightening is required, the straightening head 2 is pushed towards the torsion bar via the electric lead screw 51, positioning the torsion bar between two rotating bearings. The straightening head 2 can be replaced according to the specifications of the torsion bar. The motor 11 is then turned on, and the torsion bar rotates within the straightening head 2, achieving straightening. It is worth noting that the straightening head 2 clamps the torsion bar between the two bearings. Because the fixed center of the torsion bar remains stationary, straightening is achieved through the torsion bar's own rotation, without requiring the straightening head 2 to slide along its axial direction.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsion bar alignment device for an electric power assisted steering unit of a motor vehicle, characterised in that: This includes clamping stations, inspection stations, and calibration stations set on the machine tool; The testing station and calibration station are located on opposite sides of the clamping station; The clamping station includes a rotatable fixture driven by a motor (3); The inspection station includes a mounting table (8) that can slide along the axial and radial directions of the tooling (3), and a displacement sensor (1) is installed at the front end of the mounting table (8); The calibration station includes a platform (4) that can slide radially along the tooling. A straightening head (2) is provided at the front end of the platform (4). The straightening head (2) includes two rotating bearings installed at intervals.

2. A torsion beam calibration device for an electric power assisted steering gear of a vehicle as defined in claim 1, characterized in that: The motor (11) is installed at the rear end of the clamping station. The tooling uses a chuck fixture and is installed at the output end of the motor (11).

3. A torsion beam calibration device for an electric power assisted steering gear of a vehicle as defined in claim 1, characterized in that: The testing station includes a first base plate (10) mounted on the machine platform. A first slide rail (101) and a manual lead screw (71) are mounted on the first base plate (10). The first slide rail (101) and the manual lead screw (71) are parallel to each other. A handwheel (7) is fixedly connected to the end of the manual lead screw (71). It also includes a transition bracket (83), the bottom of which is equipped with a lead screw nut (81) and is connected to the manual lead screw (71) for transmission. The transition bracket (83) is also slidably connected to the first slide rail (101).

4. A torsion beam calibration device for an electric power assisted steering gear of a vehicle as defined in claim 3, characterized in that: A cylinder (82) is mounted on the transition bracket (83). The output end of the cylinder (82) is connected to the mounting platform (8), and the mounting platform (8) is slidably connected to the transition bracket (83).

5. The torsion beam calibration device for an electric power steering gear of an automobile according to claim 1, characterized in that: The calibration station includes a second base plate (6) fixedly installed on the machine base. An electric lead screw (51) and a second slide rail (61) are installed on the second base plate (6). The platform (4) is slidably connected to the second slide rail (61) and is connected to the electric lead screw (51) through a threaded part (41).

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