CN221325889U

CN221325889U - Middle support device for torsion test of automobile half shaft

Info

Publication number: CN221325889U
Application number: CN202323107266.XU
Authority: CN
Inventors: 李永伟
Original assignee: Yifa Transmission Shaft Shanghai Co ltd
Current assignee: Yifa Transmission Shaft Shanghai Co ltd
Filing date: 2023-11-17
Publication date: 2024-07-12
Anticipated expiration: 2033-11-17

Abstract

The utility model relates to the technical field of automobile half-axle tests, in particular to an automobile half-axle torsion test middle support device which comprises a hydraulic oil source, an oil pipe, a torsion hydraulic cylinder, a flange, a support, a half-axle test piece, a torsion sensor assembly, a support and a rack base, wherein the oil pipe is fixedly arranged on the hydraulic oil source; the torsion sensor assembly is arranged on the rack base through a bracket; and the middle bracket device is positioned between the torsion hydraulic cylinder and the torsion sensor bracket and is arranged on the torsion rack base. The intermediate bracket device for the torsion test of the automobile half shaft solves the problem that the time of the torsion fatigue test of the half shaft is too long, and has strong practicability.

Description

Middle support device for torsion test of automobile half shaft

Technical Field

The utility model relates to the technical field of automobile half shaft tests, in particular to an automobile half shaft torsion test middle support device.

Background

Automotive powertrains are typically composed of engine-clutch-transmission-propeller shaft-axle-half shafts (also known as drive shafts) -wheels. For a launch front drive arrangement, the power transmission is typically composed of engine-clutch-transmission-axle-wheels. Automotive axle shafts are an integral component of an automotive driveline.

In the development or production of automotive axle shafts, it is necessary to test the axle halves. One such test is the torsional fatigue test. That is, the half shaft of the automobile is mounted on the torsion test bench, one end of the half shaft is fixed, and the other end of the half shaft is applied with a torque of O+ -A (Nm) (O means an initial torque applied to the half shaft, A means a torque amplitude value), and the half shaft is repeatedly and circularly tested at a certain frequency F (Hz) in a sine wave signal loading mode. Only until the half shaft is damaged and fails.

In the prior art, high-pressure oil generated by a hydraulic oil source enters a torsion hydraulic cylinder through an oil pipe, and the torsion hydraulic cylinder is arranged on a torsion rack base through a bracket. The output port of the torsion hydraulic cylinder is provided with a flange, the other end of the flange is provided with a half-shaft test piece, and the test piece is connected with a torsion sensor assembly of the torsion rack through the other flange. The torsion sensor assembly is mounted on the bench base through a bracket. The hydraulic cylinder obtains power through a hydraulic source to apply O+/-A (Nm) torque to the half-shaft test piece, and fatigue cycle test is carried out. Typically, the torque for half axle test O+ -A (Nm) is given by the customer, e.g., a torque for a torsional fatigue test of a certain automotive half axle is 0+ -1350 Nm, which requires more than 300000 cycles. The test speed of the half-shaft torsion test is usually specified by the customer as f=1 Hz, and then the time required for the test piece to run 300000 times is: 300000/(1×3600) =83 hours, about 3.46 days. That is, one half-shaft torsional fatigue test requires at least 3.46 days, and one set of half-shafts (typically 5) requires 3.46×5=17.3 days. That is, the torsion test apparatus needs to be operated continuously for 17.3 days, which requires a large consumption of electric power, manpower and material resources. In order to shorten the time of the torsion fatigue test of the half shaft, the invention is used for testing the middle bracket device of the torsion test of the automobile half shaft.

Disclosure of utility model

The utility model provides an intermediate bracket device for testing torsion of an automobile half shaft, and aims to solve the problem that the time for testing torsion fatigue of the half shaft is too long.

The embodiment of the utility model is realized in such a way that an intermediate bracket device for testing torsion of an automobile half shaft comprises: the device comprises a hydraulic oil source, an oil pipe, a torsion hydraulic cylinder, a flange, a bracket, a half-axle test piece, a torsion sensor assembly, a bracket and a rack base, wherein the oil pipe is fixedly arranged on the hydraulic oil source, high-pressure oil generated by the hydraulic oil source can flow through the oil pipe, one end of the oil pipe, which is far away from the hydraulic oil source, is connected with the torsion hydraulic cylinder, the high-pressure oil generated by the hydraulic oil source can enter the torsion hydraulic cylinder through the oil pipe, the torsion hydraulic cylinder is arranged on the torsion rack base through the bracket, the flange is arranged at an output port of the torsion hydraulic cylinder, the half-axle test piece is arranged at the other end of the flange, the test piece is connected with the torsion sensor assembly of the torsion rack through the other flange, and the torsion sensor assembly is arranged on the rack base through the bracket; the middle bracket device is positioned between the torsion hydraulic cylinder and the torsion sensor bracket and is arranged on the torsion rack base, and a half-shaft test piece is arranged between the middle bracket device and the torsion hydraulic cylinder through a flange; and another half-shaft test piece is arranged between the middle bracket device and the torsion sensor assembly through a flange.

Preferably, the intermediate bracket device comprises: the bracket is arranged on the bench base through bolts, a chain wheel shaft is arranged on the bracket bottom plate, the chain wheel shaft slightly protrudes out of the bracket bottom plane and is meshed with a chain on the bench base, and a square head is fixedly arranged on the chain wheel shaft; the bearing seat assembly is arranged in the middle of the bracket, flange interfaces are respectively arranged on two sides of the bearing seat assembly, and can be connected with a half-shaft test piece through a transition flange, and a spring positioning pin is arranged on the bearing seat assembly; the screw rod is arranged on the bearing seat assembly shell, one end of the screw rod is fixedly connected with a steering wheel, and the steering wheel is used for controlling the screw rod to rotate so as to enable the bearing seat assembly to move up and down; and the graduated scale is arranged on the bracket and is used for moving up and down on the bearing assembly to display the reference mark position, and two lifting hooks are arranged at the upper end of the bracket assembly device.

Preferably, the bearing housing assembly comprises: the flange sleeve is sleeved on the flange shaft, the flange shaft is arranged on the bearing seat shell through two bearings, the inner hole of the flange sleeve is in a round-head triangle shape and is matched with the round-head triangle-shaped shaft of the flange shaft, and the outer diameter of the flange sleeve is sleeved with a tightening disc to form an assembly; the locking disk includes: bolts, annular discs and inner hoops.

The intermediate bracket device for the torsion test of the automobile half shaft solves the problem of overlong time of the torsion fatigue test of the half shaft, and is simple to operate and high in practicability.

Drawings

FIG. 1 is a schematic diagram of a middle bracket device for torsion testing of an automobile half shaft.

FIG. 2 is a schematic illustration of an intermediate bracket assembly of an automotive axle shaft torsion test intermediate bracket assembly configuration.

Fig. 3 is a front view of an intermediate bracket device of the structure of the intermediate bracket device for testing the torsion of the half shaft of the automobile.

FIG. 4 is a schematic view of a bearing seat assembly of an intermediate bracket assembly structure for an automotive axle shaft torsion test.

FIG. 5 is a partial schematic view of an intermediate bracket device of an automotive axle shaft torsion test intermediate bracket device structure.

FIG. 6 is a schematic diagram of an assembly of an intermediate bracket device structure for an automotive axle shaft torsion test.

In the accompanying drawings: 1-hydraulic oil source, 2-oil pipe, 3-torsion hydraulic cylinder, 4-flange, 5-bracket, 6-half axle test piece, 7-torsion sensor assembly, 8-bracket, 9-rack base, 10-middle bracket device, 11-bracket, 12-sprocket shaft, 13-square head, 14-bearing seat assembly, 15-flange interface, 16-spring positioning pin, 17-lead screw, 18-steering wheel, 19-scale, 20-lifting hook, 151-flange sleeve, 152-flange shaft, 21-bearing seat, 22-bearing, 23-tightening disk, 24-assembly, 231-bolt, 232-ring disk, 233-inner hoop.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Specific implementations of the utility model are described in detail below in connection with specific embodiments.

Referring to fig. 1, an intermediate bracket device for testing torsion of an automotive axle provided by an embodiment of the present utility model includes:

The hydraulic oil testing device comprises a hydraulic oil source 1, an oil pipe 2, a torsion hydraulic cylinder 3, a flange 4, a bracket 5, a half-shaft test piece 6, a torsion sensor assembly 7, a bracket 8 and a rack base 9, wherein the oil pipe 2 is fixedly arranged on the hydraulic oil source 1, high-pressure oil generated by the hydraulic oil source 1 can flow through the oil pipe 2, one end, far away from the hydraulic oil source 1, of the oil pipe 2 is connected with the torsion hydraulic cylinder 3, the high-pressure oil generated by the hydraulic oil source 1 can enter the torsion hydraulic cylinder 3 through the oil pipe 2, the torsion hydraulic cylinder 3 is arranged on the torsion rack base 9 through the bracket 5, the flange 4 is arranged at an output port of the torsion hydraulic cylinder 3, the half-shaft test piece 6 is arranged at the other end of the flange 4, the test piece 6 is connected with the torsion sensor assembly 7 of the torsion rack through the other flange 4, and the torsion sensor assembly 7 is arranged on the rack base 9 through the bracket 8; an intermediate bracket device 10 which is arranged between the torsion hydraulic cylinder 3 and the torsion sensor bracket 7 and is arranged on the torsion rack base 9, wherein a half-shaft test piece 6 is arranged between the intermediate bracket device 10 and the torsion hydraulic cylinder 3 through a flange 4; another half shaft test piece 6 is arranged between the middle bracket device 10 and the torsion sensor unit 7 through the flange 4.

The hydraulic cylinder 3 is powered by a hydraulic source 1 to apply torque of the magnitude of O+/-A (Nm) to two half-shaft test pieces 6 connected in series through an intermediate bracket device 10, and a fatigue cycle test is performed.

An intermediate bracket device 10 is arranged between the hydraulic torsion power 3 at the starting end of the torsion rack and the torsion sensor unit 7 at the terminal end. The left side and the right side of the device are respectively provided with a test piece 6 at the same time, so that the two test pieces 6 work at the same time. Instead of the previously conventional test state with only one test piece 6. Greatly saves test time and energy consumption.

As shown in fig. 2 and 3, as a preferred embodiment of the present utility model, the intermediate bracket device 10 includes: the bracket 11 is arranged on the rack base 9 through bolts, a chain wheel shaft 12 is arranged on the bottom plate of the bracket 11, the chain wheel shaft 12 slightly protrudes out of the bottom plane of the bracket 11 and is meshed with a chain on the rack base 9, and a square head 13 is fixedly arranged on the chain wheel shaft 12; the bearing seat assembly 14 is arranged in the middle of the bracket 11, flange interfaces 15 are respectively arranged on two sides of the bearing seat assembly, the bearing seat assembly 14 can be connected with the half-shaft test piece 6 through the transition flange 4, and a spring positioning pin 16 is arranged on the bearing seat assembly 14; the screw rod 17 is arranged on the housing of the bearing seat assembly 14, one end of the screw rod 17 is fixedly connected with a steering wheel 18, and the steering wheel 18 is used for controlling the screw rod 17 to rotate so as to enable the bearing seat assembly 14 to move up and down; a scale 19 is mounted on the support 11 for movement up and down the bearing assembly 14 to display the reference mark position, and two lifting hooks 20 are mounted on the upper end of the support assembly.

A bolted steel plate assembly bracket 11 is mounted on the gantry base 9. The bottom plate of the bracket is provided with a sprocket shaft 12 which protrudes slightly from the bottom plane of the bracket and is meshed with a chain on the pedestal 9 of the rack. The sprocket is rotated by turning the square head 13 on the sprocket shaft 12 by a wrench, so that a lateral thrust is generated by engagement of the sprocket with the chain, and the bracket device 10 is freely moved on the stand base 9 up to a desired position and is fixed by bolts on the bottom plate. The middle part of the bracket device is provided with a bearing seat assembly 14, two sides of the bracket device are respectively provided with a flange interface 15, and the two sides of the bracket device can be connected with a half-shaft test piece 6 through a transition flange 4. The bearing seat assembly 14 is provided with a spring positioning pin 16, so that when the center line of the bearing seat assembly is coaxial with the axis of the hydraulic cylinder 3 of the torsion bench, namely, when the half-shaft test piece is in a horizontal installation state, the spring positioning pin is positioned on one hole of the bracket, and the upper position and the lower position of the bearing seat 14 at the moment are indicated to be standard zero lines. The position remains unchanged under the test of the straight state of the test piece. The shell of the bearing seat assembly 14 is provided with a screw rod 17, and the bearing seat assembly 14 is moved up and down by the rotation of a steering wheel 18, so that the half-shaft test piece 6 forms a required included angle to carry out torsion test. A scale 19 is mounted on the carriage to display the position of the reference mark for up and down movement of the bearing assembly 14. Two lifting hooks 20 are arranged at the upper end of the bracket assembly device.

As shown in fig. 4, 5 and 6, as a preferred embodiment of the present utility model, the bearing housing assembly 14 includes: the flange sleeve 151, the flange shaft 152, the bearings 22 and the bearing seat 21, wherein the flange sleeve 151 is sleeved on the flange shaft 152, the flange shaft 152 is arranged on the bearing seat shell 21 through the two bearings 22, the inner hole of the flange sleeve 151 is in a round-head triangle shape and is matched with the round-head triangle-shaped shaft of the flange shaft 152, and the outer diameter of the flange sleeve 151 is sleeved with the tightening disc 23 to form the assembly 24; the locking disc 23 comprises: bolts 231, ring disks 232, and inner hoops 233.

The engagement of the flange sleeve 151 with the flange shaft 152 is not a conventional spline, rectangular or half-key, or interference fit connection to transfer torque, but rather a molded connection.

The inner hole of the flange sleeve 151 is in a round-head triangle shape and is matched with a round-head triangle shape shaft of the flange shaft 152. The flange sleeve 151 is externally fitted with a shrink-fit disc 23 to form the assembly 24 and finally assembled to the flange shaft 152 which houses the bearing 22 and bearing housing 21. The tightening disk 23 has a set of bolts 231 thereon. When the bolt is fastened, the axial distance between the two ring discs 232 is gradually reduced, the notched inner hoop 233 of the tightening disc is pressed by the axial slope of the outer surface of the inner hoop to gradually reduce the diameter of the inner hoop, the outer diameter of the flange sleeve 151 is compressed by the inner hoop 233, and the neck of the flange sleeve is tightly attached to the flange shaft 152 to transmit torque. This design ensures that large torques are transmitted and its fatigue life tends to be infinite.

The total time of the half-axle test of one group is shortened from 17.3 days to 8.65 days, and the average time of each half-axle test is shortened from 3.46 days to 1.73 days. The test time and the energy consumption are greatly reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The middle bracket device for the torsion test of the automobile half shaft comprises a hydraulic oil source, an oil pipe, a torsion hydraulic cylinder, a flange, a bracket, a half shaft test piece, a torsion sensor assembly, a bracket and a rack base, and is characterized in that the oil pipe is fixedly arranged on the hydraulic oil source, high-pressure oil generated by the hydraulic oil source can flow through the oil pipe, one end, far away from the hydraulic oil source, of the oil pipe is connected with the torsion hydraulic cylinder, the high-pressure oil generated by the hydraulic oil source can enter the torsion hydraulic cylinder through the oil pipe, the torsion hydraulic cylinder is arranged on the torsion rack base through the bracket, the flange is arranged at an output port of the torsion hydraulic cylinder, the half shaft test piece is arranged at the other end of the flange, the test piece is connected with the torsion sensor assembly of the torsion rack through the other flange, and the torsion sensor assembly is arranged on the rack base through the bracket;

The middle bracket device is positioned between the torsion hydraulic cylinder and the torsion sensor bracket and is arranged on the torsion rack base, and a half-shaft test piece is arranged between the middle bracket device and the torsion hydraulic cylinder through a flange; and another half-shaft test piece is arranged between the middle bracket device and the torsion sensor assembly through a flange.

2. The automotive axle shaft torsion test center bracket apparatus of claim 1, wherein said center bracket apparatus comprises:

The bracket is arranged on the bench base through bolts, a chain wheel shaft is arranged on the bracket bottom plate, the chain wheel shaft slightly protrudes out of the bracket bottom plane and is meshed with a chain on the bench base, and a square head is fixedly arranged on the chain wheel shaft;

The bearing seat assembly is arranged in the middle of the bracket, flange interfaces are respectively arranged on two sides of the bearing seat assembly, and can be connected with a half-shaft test piece through a transition flange, and a spring positioning pin is arranged on the bearing seat assembly;

The screw rod is arranged on the bearing seat assembly shell, one end of the screw rod is fixedly connected with a steering wheel, and the steering wheel is used for controlling the screw rod to rotate so as to enable the bearing seat assembly to move up and down;

And the graduated scale is arranged on the bracket and is used for moving up and down on the bearing assembly to display the reference mark position, and two lifting hooks are arranged at the upper end of the bracket assembly device.

3. The automotive axle shaft torsion test center bracket apparatus of claim 2, wherein the bearing housing assembly comprises:

The flange sleeve is sleeved on the flange shaft, the flange shaft is arranged on the bearing seat shell through two bearings, the inner hole of the flange sleeve is in a round-head triangle shape and is matched with the round-head triangle-shaped shaft of the flange shaft, and the outer diameter of the flange sleeve is sleeved with a tightening disc to form an assembly;

the locking disk includes: bolts, annular discs and inner hoops.