A multi-axis load fatigue testing machine for railway vehicle brake disc bolts

Abstract

The utility model discloses a kind of multi-axle load fatigue testing machines for railway vehicle brake disc bolt, belong to test device technical field.Electric motor seat is equipped with screw hole, electric motor seat both sides plate is equipped with reinforcing rib, electric motor is connected with speed reducer through shaft coupling;Speed reducer seat is equipped with screw hole, speed reducer is connected with transmission gear Z through key and cooperates, lead screw both ends are connected with box body plate using bearing, lead screw is connected with transmission gear X and transmission gear Y through key and cooperates, sleeve is equipped with screw hole, sleeve and brake disc bolt are connected together through thread, workbench bottom is equipped with screw hole, box body is equipped with screw hole, workbench and box body are connected through bolt, workbench is H type structure, left baffle, right baffle, anti-rotation chuck are placed in the groove of workbench.Used for multi-axle load fatigue test.

Description

TECHNICAL FIELD

[0001] The utility model relates to test device technical field, concretely relates to a kind of multi-axle load fatigue testing machine of brake disc bolt. BACKGROUND

[0002] In the running process of railway vehicle, brake disc bolt mainly faces two failure modes: loosening and fatigue fracture. These two failure modes are not isolated, but there is a certain competitive relationship. Specifically, transverse load is easy to cause bolt loosening, while axial load is more likely to cause fatigue fracture. However, most of the bolt failure test equipment on the market can only apply load in a single direction (axial or transverse). Since railway vehicles often bear multi-directional composite load during actual operation, it is particularly important to use multi-axle load for bolt failure testing. This not only helps to better understand the failure mode of the bolt under different load forms, but also provides an important reference for improving the safety and reliability of railway vehicles. SUMMARY

[0003] The utility model aims at providing a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt, it can simultaneously load multi-axle load, simulates the loading condition of brake disc bolt when vehicle runs.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme: a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt, characterized by including motor, motor base, shaft coupling, speed reducer, speed reducer base, transmission gear X, transmission gear Y, transmission gear Z, lead screw, actuator X, sleeve, nut, left baffle, workbench, right baffle, anti-rotation chuck, actuator Y, actuator Y fixed base;Motor base is provided with screw hole, and the both sides of motor base are provided with reinforcing rib, and motor is connected with speed reducer by shaft coupling;Speed reducer base is provided with screw hole, and speed reducer is connected with transmission gear Z by key, and both ends of lead screw are connected with box body plate using bearing, and lead screw is connected with transmission gear X and transmission gear Y by key;Workbench is provided with screw hole, and box body is provided with screw hole, and workbench and box body are connected by bolt;Workbench is H-shaped structure, and left baffle, right baffle and anti-rotation chuck are placed in the groove of workbench.

[0005] The sleeve is provided with clamping rod on the left side, and the actuator X is connected with the sleeve through the clamping rod on the left side of the sleeve;The sleeve is provided with threaded hole and connected with brake disc bolt, and the brake disc bolt is placed on the bottom of the threaded hole of the sleeve;The sleeve is provided with round hole.

[0006] The right baffle is provided with oil groove.

[0007] In the above technical scheme, the utility model provides a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt, with following beneficial effects:

[0008] 1, the utility model can simultaneously load axial load, transverse load, torque, can simulate the loading condition of brake disc bolt in running process, can carry out brake disc bolt loosening and fatigue fracture competing failure test.

[0009] 2, different loads in different directions can be loaded according to experimental needs, different experiments are carried out, simple structure, convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the drawings needed in the embodiments will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0011] Figure 1 It is a top view schematic diagram of a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt provided for the example of the present application;

[0012] Figure 2 It is a front view schematic diagram of a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt provided for the example of the present application;

[0013] Figure 3 It is a workbench schematic diagram of a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt provided for the example of the present application.

[0014] Figure 4 It is a sleeve schematic diagram of a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt provided for the example of the present application.

[0015] Figure 5 It is a right baffle schematic diagram of a kind of multi-axle load fatigue testing machine for railway vehicle brake disc bolt provided for the example of the present application.

[0016] REFERENCE NUMERALS:

[0017] 1, motor;2, motor base;3, shaft coupling;4, speed reducer;5, speed reducer base;6, transmission gear X;7, transmission gear Y;8, transmission gear Z;9, lead screw;10, actuator X;11, sleeve;12, nut;13, left baffle;14, workbench;15, right baffle;16, anti-rotation chuck;17, actuator Y;18, actuator Y fixed base. DETAILED DESCRIPTION

[0018] AsFigure 1 As shown in the figure, a multi-axis load fatigue testing machine for railway vehicle brake disc bolts comprises a motor 1, a motor base 2, a shaft coupling 3, a speed reducer 4, a speed reducer base 5, a transmission gear X 6, a transmission gear Y 7, a transmission gear Z 8, a lead screw 9, an actuator X 10, a sleeve 11, a nut 12, a left baffle 13, a workbench 14, a right baffle 15, and an anti-rotation chuck 16. The motor base 2 is provided with a threaded hole, and the two side plates of the motor base 2 are provided with reinforcing ribs. The motor 1 is connected with the speed reducer through the shaft coupling 3. The speed reducer base 5 is provided with a threaded hole, and the speed reducer 4 is connected with the transmission gear Z 8 through a key. The lead screw 9 is connected with the transmission gear X 6 and the transmission gear Y 7 through a key. The workbench 14 is provided with a threaded hole, and the box body is provided with a threaded hole. The workbench 14 and the box body are connected through bolts. The workbench 14 is of H-shaped structure, and the left baffle 13, the right baffle 15, and the anti-rotation chuck 16 are placed in the groove of the workbench.

[0019] Further, the workbench 14 is of H-shaped structure, and is provided with a bolt hole at the bottom. The upper plate of the box body is provided with a bolt hole coaxial with the bolt hole at the bottom of the workbench 14. The workbench 14 is fixed on the upper plate of the box body through bolts. The workbench 14 is provided with a round hole at the middle beam, which is coaxial with the holes of the left baffle 13 and the right baffle 15 after assembly. The brake disc bolt passes through the round hole, connecting the left baffle 13, the workbench 14, and the right baffle 15. The width of the groove of the workbench 14 is the same as the width of the left baffle 13 and the right baffle 15. After assembly, the left baffle 13 and the right baffle 15 are placed in the groove.

[0020] Further, after connecting the left baffle 13 and the right baffle 15 with the workbench 14 through the brake disc bolt, the anti-rotation chuck 16 is connected with the head of the brake disc bolt, and then the nut is pre-tightened.

[0021] Further, the sleeve 11 is provided with a clamping rod at the left side. The actuator X 10 is connected with the sleeve 11 through the clamping rod at the left side of the sleeve 11, so that the load output by the actuator X 10 is transmitted to the sleeve 11. The sleeve 11 is provided with a threaded hole, so that the sleeve 11 can be connected with the brake disc bolt. The brake disc bolt stops at the bottom of the threaded hole of the sleeve 11, so that the torque generated by the actuator cannot be converted into axial force of the brake disc bolt. The sleeve 11 is provided with a round hole to prevent the nut from blocking when the sleeve 11 is connected with the brake disc bolt, ensuring the contact between the brake disc bolt and the bottom of the threaded hole. The sleeve 11 transmits the load to the brake disc bolt.

[0022] Further, the right baffle 15 is provided with a circular hole coaxial with the circular holes on the workbench 14 and the left baffle 13, and a brake disc bolt passes through the circular hole to connect the left baffle 13, the workbench 14 and the right baffle 15. The right baffle 15 is provided with oil grooves on two sides in contact with the workbench 14 and the anti-rotation chuck 16, and lubricating oil is applied in the oil grooves to prevent sticking caused by heat generated by friction during lateral displacement of the right baffle 15. The right baffle 15 is provided with a clamping rod below, and the upper plate of the box body is provided with a circular hole through which the clamping rod below the right baffle is connected with an actuator Y17. The actuator Y17 clamps the clamping rod below the right baffle 15, and drives the right baffle 15 to move, which is converted into lateral displacement of the brake disc bolt.

[0023] The multiaxial load fatigue testing machine for the railway vehicle brake disc bolt is provided with an actuator on a lead screw and a sleeve connected with the bolt. The position of the actuator can be changed with the lead screw, and the actuator clamps the sleeve to apply tensile and torsional load generated by the actuator to the brake disc bolt. After the brake disc bolt is pre-tightened, the sleeve is connected with the brake disc bolt through threads and is screwed until the brake disc bolt contacts the bottom of a circular hole of the sleeve, so that the torque generated by the actuator is loaded on the brake disc bolt. The actuator is arranged below the clamping rod of the right baffle, and applies lateral displacement of the brake disc bolt by driving the right baffle to move up and down. The right baffle is provided with oil grooves on two sides to prevent sticking caused by heat generated by friction. During the experiment, the right baffle is placed on the workbench, the clamping rod passes through the circular hole of the upper plate of the box body and is connected with the actuator. Then, the left baffle is placed on the workbench, the bolt passes through the circular holes of the left baffle, the workbench and the right baffle, the nut is screwed for a part but is not pre-tightened, the anti-rotation chuck is connected with the bolt head and the nut is pre-tightened. The sleeve is screwed on the brake disc bolt until the brake disc bolt contacts the bottom of the circular hole of the sleeve. Then, the motor is started to drive the lead screw to rotate, and the actuator moves to the position of clamping the sleeve. The multiaxial load fatigue testing machine for the railway vehicle brake disc bolt can simultaneously load tensile, torsional and lateral loads, and can also load the tensile, torsional and lateral loads separately or in combination according to the experiment requirements by starting different actuators, so as to more truly simulate the loading condition of the brake disc load. The equipment is simple and convenient to install, and can meet various experiment requirements.

[0024] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature.

Claims

1. A multi-axle load fatigue testing machine for a railway vehicle brake disc bolt, characterized by, It includes motor (1), motor base (2), coupling (3), reducer (4), reducer base (5), transmission gear X (6), transmission gear Y (7), transmission gear Z (8), lead screw (9), actuator X (10), sleeve (11), nut (12), left baffle (13), workbench (14), right baffle (15), anti-rotation chuck (16), actuator Y (17), actuator Y fixed base (18); motor base (2) is provided with screw hole, motor base (2) both sides plate is provided with reinforcing rib, motor (1) is connected with reducer through coupling (3); reducer base (5) is provided with screw hole, reducer (4) is connected with transmission gear Z (8) through key, lead screw (9) both ends are connected with box body plate using bearing, lead screw (9) is connected with transmission gear X (6) and transmission gear Y (7) through key; workbench (14) is provided with screw hole, box body is provided with screw hole, workbench (14) and box body are connected through bolt; workbench (14) is H type structure, left baffle (13), right baffle (15), anti-rotation chuck (16) are placed in the groove of workbench.

2. The multi-axle load fatigue testing machine for the bolts of the brake disc of a railway vehicle according to claim 1, characterized in that, The right baffle (15) is provided with a clamping rod below the box body upper plate is provided with a round hole, the clamping rod below the right baffle passes through the round hole and is connected with the actuator Y (17), the actuator Y (17) clamps the clamping rod below the right baffle (15).

3. The multi-axle load fatigue testing machine for the bolts of the brake disc of a railway vehicle according to claim 1, characterized in that, The right baffle (15) is provided with an oil groove.

4. The multi-axle load fatigue testing machine for the bolts of the brake disc of a railway vehicle according to claim 1, characterized in that, The sleeve (11) is provided with a clamping rod on the left side, and the actuator X (10) is connected with the sleeve (11) through the clamping rod on the left side of the sleeve (11).

5. The multi-axle load fatigue testing machine for the bolts of the brake disc of a railway vehicle according to claim 1, characterized in that, The sleeve (11) is provided with a threaded hole and is connected with a brake disc bolt, and the brake disc bolt abuts against the bottom of the threaded hole of the sleeve (11).

6. The multi-axle load fatigue testing machine for the bolts of the brake disc of a railway vehicle according to claim 1, characterized in that, The sleeve (11) is provided with a round hole.

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