CN214748845U

CN214748845U - Testing device for stick-slip test of automobile steering intermediate shaft

Info

Publication number: CN214748845U
Application number: CN202122477053.0U
Authority: CN
Inventors: 张铁山; 郭振洲; 郭冬冬
Original assignee: Yubei Csa Xinxiang Auto Tech Co ltd
Current assignee: Yubei Csa Xinxiang Auto Tech Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2021-11-16
Anticipated expiration: 2031-10-14

Abstract

The utility model discloses a car turns to jackshaft stick-slip test's testing arrangement, it includes test table face, and one side on test table face is equipped with twists reverse the loading device system, and the opposite side on the test table is equipped with sharp loading device system, twists reverse loading device system and sharp loading device system and is the straight line and arranges or simulate whole car arrangement mode to leave the interval. The utility model discloses the structure is more reasonable, and the result of use is better to can accurate test turn to the atress condition of jackshaft under the load.

Description

Testing device for stick-slip test of automobile steering intermediate shaft

Technical Field

The utility model relates to a testing arrangement of auto steering jackshaft, especially a testing arrangement suitable for stick-slip test to auto steering jackshaft.

Background

The main function of the automobile steering intermediate shaft is to transmit steering torque, and the sliding function of the steering intermediate shaft can generate normal collapse to relieve the injury to a driver when the automobile collides frontally. The design of the automobile steering intermediate shaft pursues the following aims: the middle shaft has the advantages of high torsion transmission, good steering hand feeling, small sliding friction force and long service life, and needs to meet the NVH requirements for the first time, and particularly, stick slip noise is one of the key points in the research of the middle shaft.

In the test of the stick-slip test of the steering intermediate shaft, the sliding force test under the load and the sliding force endurance test under the load, a tension pressure sensor and a torque sensor are usually additionally arranged to simulate various motion states of a real vehicle, the tension pressure sensor is influenced by the torsional force in the process of monitoring the tension pressure data, the tension pressure sensor has large error and is inaccurate in test data, and the stress condition of the steering intermediate shaft under the load cannot be correctly tested; therefore, a novel device is needed to ensure that the test is carried out under the condition that the intermediate shaft bears the torque, the sensor of the sliding force of the intermediate shaft is not influenced by torsion, and accurate data can be normally measured.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rational in infrastructure, excellent in use effect's auto steering jackshaft stick-slip test's testing arrangement.

The technical scheme of the utility model be, a car turns to jackshaft stick-slip test's testing arrangement, it includes experimental mesa, its characterized in that: a torsion loading device system is arranged on one side of the test table surface, a linear loading device system is arranged on the other side of the test table, and the torsion loading device system and the linear loading device system are arranged in a straight line and are spaced; the linear loading device system comprises a servo motor, the servo motor drives a speed reducer, the speed reducer drives a servo electric cylinder, the servo electric cylinder is fixed on a liftable tooling assembly, the liftable tooling assembly is installed on a linear guide rail, and a guide rod of the servo electric cylinder is fixedly connected with a tension and pressure device with torque protection.

Draw pressure device include the electricity jar connecting plate, the central point of electricity jar connecting plate puts and is fixed with No. two sensor joints, No. two sensor joints have linked firmly and draw pressure sensor, draw pressure sensor to link firmly a sensor joint, a sensor joint even has the ball joint subassembly, the ball joint subassembly is: the ball head of the ball head rod is embedded in the ball seat, and a lining is arranged at the contact part of the ball head and the ball seat; the tail part of the ball head rod is fixedly connected with a connecting rod with a straight raceway, a connecting flange is arranged on the outer side of the connecting rod with the straight raceway, and a fixing sleeve is sleeved on the connecting rod with the straight raceway; a fixed chuck is fixed through the dead lever between the electricity jar connecting plate, also fixed through the dead lever between No. two fixed chucks and the fixed chuck, and fixed cover is located between a fixed chuck and No. two fixed chucks.

The structure of the torsion loading device system comprises a second servo motor, the second servo motor drives a second speed reducer and the second speed reducer connected with the second servo motor is connected with a coupler, the coupler is connected with a rotary linear elastic assembly, the rotary linear elastic assembly is installed on a revolving platform, and a guide rail is laid below the revolving platform.

The structure of the rotary linear elastic component comprises a rotary fixing sleeve, a guide motion rod is arranged in the rotary fixing sleeve, a spring is sleeved on the guide motion rod, a connecting disc is arranged in the middle of the guide motion rod, a long hole is preset on the outer side of the rotary fixing sleeve, a sliding block is assembled in the long hole, and the sliding block is fixedly connected with the connecting disc through a screw; bearing seats are arranged at two ends of the rotary fixing sleeve, and bearings are assembled in the bearing seats; one end of the guide motion rod is fixedly connected with the rotary transition disc, and the rotary transition disc is connected with the coupler; the other end of the guiding motion rod is fixedly connected with a first sensor connecting disc, and a torque sensor is fixed between the first sensor connecting disc and a second sensor connecting disc.

The utility model discloses the structure is more reasonable, and the result of use is better, can turn to the atress condition of jackshaft under the load by accurate test. The test on the automobile steering intermediate shaft is more convenient and quicker, the test effect is effectively ensured, and the test accuracy is improved.

The test device comprises a linear loading device, a torsional loading device and a test table board. The torsion device applies specified torque to the automobile steering intermediate shaft, the linear loading device starts to push or pull the steering intermediate shaft to do reciprocating motion, before the automobile steering intermediate shaft starts to move, the automobile steering intermediate shaft overcomes the elastic force of the rotatable linear elastic component in the torsion device, after the elastic force is overcome, the inner shaft of the automobile steering intermediate shaft starts to move relative to the outer shaft, at the moment, the sliding force of the steering intermediate shaft can be accurately tested, and the stick slip (stick slip) noise performance of the intermediate shaft can be well researched.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the linear loading device system of the present invention.

Fig. 3 is a cross-sectional view of a linear loading unit system according to the present invention.

Fig. 4 is a schematic structural diagram of the torsion loading apparatus system according to the present invention.

Detailed Description

The embodiments are described in detail with reference to the accompanying drawings:

it should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the embodiment of the method, the first step,

a testing device for a stick-slip test of an automobile steering intermediate shaft comprises a test table top 38, wherein a torsion loading device system is arranged on one side of the test table top 38, a linear loading device system is arranged on the other side of the test table top 38, the torsion loading device system and the linear loading device system are arranged in a straight line mode with a gap, and the automobile steering intermediate shaft 30 is arranged between the linear loading device system and the torsion loading device system.

The structure of the linear loading device system described in this embodiment includes: the first servo motor 24 drives a first speed reducer 25 through the first servo motor 24, the first speed reducer 25 drives a servo electric cylinder 26, the servo electric cylinder 26 is fixed on a lifting tool assembly 27, the lifting tool assembly 27 is installed on a linear guide rail 28, and a guide rod of the servo electric cylinder 26 is fixedly connected with a tension and pressure device 29 with torque protection. The linear loading device is mainly used for pushing the automobile steering intermediate shaft 30 to do linear motion, monitoring and measuring stress conditions and adjusting distance.

Draw pressure device 29's structure include electric cylinder connecting plate 10, the central point of electric cylinder connecting plate 10 puts and is fixed with No. two sensor joint 9, No. two sensor joint 9 have linked firmly and draw pressure sensor 1, draw pressure sensor 1 to have linked firmly sensor joint 2, sensor joint 2 even has ball joint subassembly 3, ball joint subassembly 3 is: the ball head of the ball head rod 3-1 is embedded in the ball seat 3-2, and a bush 3-3 is arranged at the contact part of the ball head and the ball seat 3-2; the tail part of the ball head rod 3-1 is fixedly connected with a connecting rod 5 with a straight raceway, a connecting flange 6 is arranged on the outer side of the connecting rod 5 with the straight raceway, and a fixed sleeve 4 is sleeved on the connecting rod 5 with the straight raceway; no. one fixed chuck 8 and electricity jar connecting plate 10 between fixed rod 7 fixed, also fixed through fixed rod 7 between No. two fixed chucks 12 and the fixed chuck 8, fixed cover 4 is located between No. one fixed chuck 8 and No. two fixed chucks 12.

The torsion loading device system has the structure that: a second speed reducer 33 is driven by a second servo motor 34, the second speed reducer 33 is connected with a coupler 31, the coupler 31 is connected with a rotary linear elastic assembly 37, the rotary linear elastic assembly 37 is installed on a rotary table 35, and a guide rail 36 is laid below the rotary table 35. The torsion loading device mainly has the main functions of applying torsion force to the automobile steering intermediate shaft 30, and generating certain elastic force and corresponding displacement when the automobile steering intermediate shaft 30 moves; the torsional loading device can slide back and forth in the axial direction and adjust the distance.

The structure of the rotary linear elastic component 37 is as follows: a guide motion rod 18 is arranged in the rotary fixing sleeve 15, a spring 19 is sleeved on the guide motion rod 18, a connecting disc 40 is arranged in the middle of the guide motion rod 18, a long hole 41 is preset on the outer side of the rotary fixing sleeve 15, a sliding block 17 is assembled in the long hole 41, and the sliding block 17 is fixedly connected with the connecting disc 40 through a screw 16; bearing blocks 13 are arranged at two ends of the rotary fixing sleeve 15, and bearings 14 are assembled in the bearing blocks 13; one end of the guiding motion rod 18 is fixedly connected with the rotary transition disc 11, and the rotary transition disc 11 is connected with the coupler 31; the other end of the guiding motion rod 18 is fixedly connected with a first sensor connecting disc 21, and a torque sensor 22 is fixed between the first sensor connecting disc 21 and a second sensor connecting disc 23.

The utility model discloses a have torque protection, when the car turns to jackshaft 30 and receives the rotation torque power, transmit to the connecting rod 5 with straight raceway through connecting flange 6, the connecting rod 5 with straight raceway transmits the moment of torsion to the fixed subassembly through bulb pole 3-1 again, all torque values are born by the fixed subassembly, when both move in a straight line each other, the sliding friction is very little; and the pull pressure sensor 1 is connected with the connecting rod 5 with the straight raceway and the fixing component through the ball joint component 3, the rotating friction force of the ball joint component 3 can be controlled below 0.1Nm, the torque value in the torsion direction of the pull pressure sensor 1 is extremely small, and the influence on the pull pressure sensor 1 can be ignored, so that the pull pressure device 29 with the torque protection well protects the pull pressure sensor 1 from the influence of extra torque.

When the rotation transition disk 11 rotates, the rotation linear elastic component 37 drives the rotation fixing sleeve 15 to rotate relative to the bearing seat 13 through the bearing 14, and drives the rotation fixing sleeve 15 to drive the guiding motion rod 18 to rotate together through the sliding block 17. The sliding force of the automobile steering intermediate shaft 30 is transmitted to the guide motion rod 18 through the second sensor connecting disc 23, the torque sensor 22 and the first sensor connecting disc 21, and the guide motion rod 18 can move in the rotary fixing sleeve 15 after overcoming the force of the spring 19.

By the structure, before the automobile steering intermediate shaft 30 starts to move, the automobile steering intermediate shaft 30 overcomes the elastic force of the rotating linear elastic assembly 37 in the torsion device, and after the elastic force is overcome, the inner shaft of the automobile steering intermediate shaft 30 starts to move relative to the outer shaft, so that the sliding force of the automobile steering intermediate shaft 30 can be accurately tested, and the stick-slip noise performance of the automobile steering intermediate shaft 30 can be well researched.

The above examples are merely illustrative for clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. It is not necessary or necessary to exhaustively enumerate all embodiments herein, and obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a testing arrangement of car turns to jackshaft stick-slip test, it includes experimental mesa, its characterized in that: a torsion loading device system is arranged on one side of the test table top, a linear loading device system is arranged on the other side of the test table top, and the torsion loading device system and the linear loading device system are arranged in a straight line and are spaced; the linear loading device system comprises a servo motor, the servo motor drives a speed reducer, the speed reducer drives a servo electric cylinder, the servo electric cylinder is fixed on a liftable tooling assembly, the liftable tooling assembly is installed on a linear guide rail, and a guide rod of the servo electric cylinder is fixedly connected with a tension and pressure device with torque protection.

2. The device for testing the stick-slip test of the steering intermediate shaft of the automobile as claimed in claim 1, wherein: draw pressure device include the electricity jar connecting plate, the central point of electricity jar connecting plate puts and is fixed with No. two sensor joints, No. two sensor joints have linked firmly and draw pressure sensor, draw pressure sensor to link firmly a sensor joint, a sensor joint even has the ball joint subassembly, the ball joint subassembly is: the ball head of the ball head rod is embedded in the ball seat, and a lining is arranged at the contact part of the ball head and the ball seat; the tail part of the ball head rod is fixedly connected with a connecting rod with a straight raceway, a connecting flange is arranged on the outer side of the connecting rod with the straight raceway, and a fixing sleeve is sleeved on the connecting rod with the straight raceway; a fixed chuck is fixed through the dead lever between the electricity jar connecting plate, also fixed through the dead lever between No. two fixed chucks and the fixed chuck, and fixed cover is located between a fixed chuck and No. two fixed chucks.

3. The device for testing the stick-slip test of the steering intermediate shaft of the automobile as claimed in claim 1, wherein: the structure of the torsion loading device system comprises a second servo motor, the second servo motor drives a second speed reducer and the second speed reducer connected with the second servo motor is connected with a coupler, the coupler is connected with a rotary linear elastic assembly, the rotary linear elastic assembly is installed on a revolving platform, and a guide rail is laid below the revolving platform.

4. The device for testing the stick-slip test of the steering intermediate shaft of the automobile as claimed in claim 3, wherein: the structure of the rotary linear elastic component comprises a rotary fixing sleeve, a guide motion rod is arranged in the rotary fixing sleeve, a spring is sleeved on the guide motion rod, a connecting disc is arranged in the middle of the guide motion rod, a long hole is preset on the outer side of the rotary fixing sleeve, a sliding block is assembled in the long hole, and the sliding block is fixedly connected with the connecting disc through a screw; bearing seats are arranged at two ends of the rotary fixing sleeve, and bearings are assembled in the bearing seats; one end of the guide motion rod is fixedly connected with the rotary transition disc, and the rotary transition disc is connected with the coupler; the other end of the guiding motion rod is fixedly connected with a first sensor connecting disc, and a torque sensor is fixed between the first sensor connecting disc and a second sensor connecting disc.