Centering measuring device of coaxial drive axle test board

Abstract

The utility model belongs to the technical field of concentricity measurement, and discloses a centering measuring device of a coaxial drive axle testboard, which comprises a connecting shaft, a centering assembly, a measuring assembly and an adjusting piece, the connecting shaft rotatably penetrates through a fixed support and is connected to a main shaft of a dynamometer, and the centering shaft rotatably penetrates through a connecting hole of a centering tool and is connected to the connecting shaft. The transmitter is arranged on a centering shaft, the receiver is arranged on a main shaft of the dynamometer, the transmitter is driven to rotate under the rotating action of the main shaft of the dynamometer, a laser beam transmitted by the transmitter is projected to a bull's-eye of the receiver, and the radial component of the displacement directly reflects the shaft deviation. The adjusting part is arranged at the bottom of the dynamometer and is used for adjusting the height of the dynamometer relative to the test board, so that the concentricity error of the main shaft of the dynamometer and the fixed support is smaller, the precision requirement range of concentricity is widened, and the test efficiency is improved. And the influence on the vibration of a coaxial transmission or an electric drive assembly is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to concentricity measurement technical field especially, it relates to coaxial drive axle test board's centering measuring device. BACKGROUND

[0002] The coaxial transmission and electric drive assembly of car are fixed with L-shaped fixed support, the main shaft of dynamometer is inserted into transmission to test load, and vibration value of transmission is measured, therefore, the stop and end surface of L-shaped fixed support need to be centered with the main shaft of dynamometer.

[0003] The traditional scheme is to use the dial gauge fixed on the main shaft of dynamometer, and the dial gauge is used to measure the end surface runout and the stop runout, since the dial gauge holder and the dial gauge are affected by the weight, the measurement result is always smaller at the upper end surface and larger at the lower end surface, the stop and end surface of the fixed support are affected by gravity, and as the length of the cantilever increases, the deviation value also increases. Moreover, this measurement method can only approach the concentricity by continuous debugging and measurement, which is time-consuming and laborious, and the deviation of concentricity also produces additional vibration value for the transmission and electric drive assembly, which affects the vibration measurement accuracy of the transmission.

[0004] Therefore, the coaxial drive axle test board's centering measuring device is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a coaxial drive axle test board's centering measuring device can detect the concentricity deviation value of the main shaft of dynamometer and the fixed support, and improve the precision requirement range of concentricity, thereby reducing the influence on the vibration of coaxial transmission or electric drive assembly.

[0006] In order to solve the above problems existing in the prior art, the utility model adopts the following technical scheme:

[0007] The coaxial drive axle test board's centering measuring device is used for measuring the concentricity of the main shaft of dynamometer and the fixed support, the fixed support and the dynamometer are installed on the test board, and the coaxial drive axle test board's centering measuring device comprises:

[0008] The connecting shaft is rotatably arranged in the fixed support and connected to the main shaft of the dynamometer;

[0009] The centering assembly comprises a centering tool and a centering shaft, the centering tool is arranged on the fixed support, the centering shaft is rotatably arranged in the connecting hole of the centering tool and connected to the connecting shaft;

[0010] A measuring assembly comprising a transmitter and a receiver, the transmitter is arranged on the centering shaft, the receiver is arranged on the main shaft of the dynamometer, the transmitter emits a laser beam to the target center of the receiver and is used for centering between the main shaft of the dynamometer and the fixed support;

[0011] An adjusting piece arranged at the bottom of the dynamometer and used for adjusting the height of the dynamometer relative to the test bench.

[0012] Preferably, the centering measuring device of the coaxial drive axle test bench further comprises a positioning pin and a flange plate, the flange plate is fixedly arranged on the fixed support, the flange plate is provided with a positioning hole, the centering tool is provided with a through hole, and the positioning pin passes through the through hole and is connected to the positioning hole.

[0013] Preferably, the centering assembly further comprises a centering bearing, the centering bearing is fixedly sleeved on the outer periphery of the centering shaft, and the outer ring of the centering bearing is fixedly connected to the inner wall of the connecting hole of the centering tool.

[0014] Preferably, the centering tool is provided with a light transmission hole, and the light transmission hole is configured to pass through the laser beam emitted by the transmitter.

[0015] Preferably, the number of the light transmission holes is multiple, and the multiple light transmission holes are arranged at intervals along the circumferential direction of the centering shaft.

[0016] Preferably, the central axis of the connecting shaft coincides with the central axis of the main shaft of the dynamometer.

[0017] Preferably, the centering measuring device of the coaxial drive axle test bench further comprises a shaft coupling, one end of the shaft coupling is connected to the connecting shaft, and the other end of the shaft coupling is connected to the main shaft of the dynamometer.

[0018] Preferably, the centering measuring device of the coaxial drive axle test bench further comprises a detection sensor, the detection sensor is fixedly connected between the shaft coupling and the main shaft of the dynamometer, and the detection sensor is used for detecting the torque of the main shaft of the dynamometer.

[0019] Preferably, the adjusting piece comprises a supporting part and a rotating part, the supporting part is arranged between the test bench and the dynamometer, the rotating part penetrates the bottom of the dynamometer and can rotate relative to the test bench, so that the dynamometer can move along the axis direction of the rotating part.

[0020] Preferably, the centering measuring device of the coaxial drive axle test bench further comprises a sliding piece and a sliding rail, the sliding rail is fixedly arranged on the test bench, and the sliding piece is arranged at the bottom of the dynamometer and is slidingly arranged on the sliding rail.

[0021] The utility model discloses a beneficial effect is:

[0022] The utility model provides a coaxial drive axle test board's centering measuring device, the connecting shaft rotates and is connected in the fixed support and is connected in the main shaft of dynamometer, and the centering assembly includes the centering tool and the centering axle, and the centering tool sets up in the fixed support, and the centering axle rotates and is connected in the connecting hole of centering tool and is connected in the connecting shaft. Measuring assembly includes transmitter and receiver, and the transmitter sets up on the centering axle, and the receiver sets up on the main shaft of dynamometer, under the rotation of the main shaft of dynamometer, drives the rotation of transmitter, and the laser beam of transmitter projects on the target heart photoelectric dot matrix of receiver and forms energy center point, and the radial component of its displacement directly reflects the shaft deviation, and the concentricity deviation value of the main shaft of dynamometer and fixed support can be detected quickly. Adjusting piece sets up in the bottom of dynamometer and is used for adjusting the height of dynamometer relative test board, and according to the deviation value of concentricity, the height of dynamometer is adjusted through adjusting piece, so that the concentricity error of the main shaft of dynamometer and fixed support is smaller, and the precision requirement range of concentricity is improved, thereby the influence on coaxial transmission or electric drive assembly vibration is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 Partially sectional view of the centering measuring device of the coaxial drive axle test board provided by the utility model embodiment is provided.

[0024] Fig. 2 Structure schematic view of the centering measuring device of the coaxial drive axle test board provided by the utility model embodiment.

[0025] Reference signs:

[0026] 100, dynamometer;200, fixed support;300, test board;

[0027] 1, connecting shaft;

[0028] 21, centering tool;22, centering axle;23, centering bearing;

[0029] 31, transmitter;32, receiver;

[0030] 4, adjusting piece;41, support part;42, rotating part;

[0031] 5, positioning pin;

[0032] 6, flange;

[0033] 7, shaft coupling;

[0034] 8, detection sensor;

[0035] 9, sliding piece;

[0036] 10. Slide rail. DETAILED DESCRIPTION

[0037] The utility model will be explained in further detail below in connection with the drawings and embodiments. It should be understood that the embodiments described herein are merely intended to explain the utility model and not to limit the utility model. It should also be noted that only parts related to the utility model are shown in the drawings for the convenience of description, not all structures.

[0038] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] In the utility model, unless explicitly defined and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through other features between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0041] As Figs. 1-2As shown, in the embodiment, the centering measurement device of the coaxial drive axle test bench is used to measure the concentricity of the main shaft of the dynamometer 100 and the fixed support 200, the fixed support 200 and the dynamometer 100 are both installed on the test bench 300, the centering measurement device of the coaxial drive axle test bench comprises a connecting shaft 1, a centering assembly, a measurement assembly and an adjusting piece 4. The connecting shaft 1 is rotatably arranged through the fixed support 200 and connected to the main shaft of the dynamometer 100, the centering assembly comprises a centering tool 21 and a centering shaft 22, the centering tool 21 is arranged on the fixed support 200, and the centering shaft 22 is rotatably arranged through the connecting hole of the centering tool 21 and connected to the connecting shaft 1. The measurement assembly comprises a transmitter 31 and a receiver 32, the transmitter 31 is arranged on the centering shaft 22, and the receiver 32 is arranged on the main shaft of the dynamometer 100, the transmitter 31 emits a laser beam to the target center of the receiver 32 and is used for centering between the main shaft of the dynamometer 100 and the fixed support 200, and the adjusting piece 4 is arranged on the bottom of the dynamometer 100 and is used for adjusting the height of the dynamometer 100 relative to the test bench 300.

[0042] Specifically, the fixed support 200 has an L-shaped structure and is used for fixing the coaxial transmission or the electric drive assembly, the centering tool 21 is fixedly installed on the fixed support 200, the center axis of the connecting hole of the centering tool 21 coincides with the center axis of the fixed support 200, the connecting hole of the centering tool 21 is rotatably provided with the centering shaft 22, and the centering shaft 22 can rotate in the centering tool 21. The centering shaft 22 is fixedly sleeved on one end of the connecting shaft 1, the other end of the connecting shaft 1 is fixedly arranged with the main shaft of the dynamometer 100, the center axis of the connecting shaft 1 coincides with the center axis of the main shaft of the dynamometer 100, and the main shaft of the dynamometer 100 can rotate synchronously through the connecting shaft 1 and the centering shaft 22. The transmitter 31 is arranged as a laser centering instrument, the displayed data can be directly fed back to the adjustment amount of the dynamometer 100, the transmitter 31 and the receiver 32 are respectively fixedly installed on the centering shaft 22 and the main shaft of the dynamometer 100, under the rotating action of the main shaft of the dynamometer 100, the transmitter 31 is driven to rotate, the laser beam emitted by the transmitter 31 is projected on the target center photoelectric dot array of the receiver 32 to form an energy center point, the radial component of the displacement of the energy center point directly reflects the shaft deviation, and the concentricity deviation value of the main shaft of the dynamometer 100 and the fixed support 200 can be quickly detected. According to the deviation value of the concentricity, the height of the dynamometer 100 is adjusted through the adjusting piece 4, the adjusting piece 4 is arranged in a telescopic structure and is used for adjusting the height of the dynamometer 100 relative to the fixed support 200 along the vertical height direction, so that the concentricity error of the main shaft of the dynamometer 100 and the fixed support 200 is smaller, the precision requirement range of the concentricity is improved from 0.05 mm to 0.01 mm, and the influence on the vibration of the coaxial transmission or the electric drive assembly is reduced.

[0043] Further, with reference to the drawings Figs. 1-2The centering measuring device of the coaxial drive axle test bench further comprises a positioning pin 5 and a flange plate 6, the flange plate 6 is fixedly arranged on the fixed support 200, the flange plate 6 is provided with a positioning hole, the centering tool 21 is provided with a through hole, and the positioning pin 5 passes through the through hole and is connected to the positioning hole. Specifically, the diagonal two positions of the centering tool 21 are respectively provided with through holes, the flange plate 6 is provided with a positioning hole at the corresponding position, the number of the positioning pins 5 is two, the two positioning pins 5 pass through the corresponding through holes and are fixedly connected with the positioning hole, so that the centering tool 21 is positioned and fixed on the flange plate 6, and the central axis of the centering tool 21 coincides with the central axis of the flange plate 6.

[0044] Further, with reference to Figs. 1-2 The centering assembly further comprises a centering bearing 23, the centering bearing 23 is fixedly sleeved on the outer periphery of the centering shaft 22, and the outer ring of the centering bearing 23 is fixedly connected to the inner wall of the connecting hole of the centering tool 21. Specifically, the inner ring of the centering bearing 23 is fixedly connected to the outer peripheral wall of the centering shaft 22, and the centering tool 21 rotates relative to the centering shaft 22 through the centering bearing 23, and meanwhile, the centering shaft 22 is connected with the main shaft of the dynamometer 100 through the connecting shaft 1, so that the main shaft of the dynamometer 100 and the centering shaft 22 are synchronously rotated.

[0045] Further, with reference to Figs. 1-2 The centering tool 21 is provided with a light-transmitting hole, and the light-transmitting hole is configured to pass through the laser beam emitted by the emitter 31. Specifically, the number of the light-transmitting holes is multiple, the multiple light-transmitting holes are arranged at intervals along the circumferential direction of the centering shaft 22, the laser beam emitted by the emitter 31 passes through the light-transmitting hole and is projected onto the target photovoltaic point array of the receiver 32 to form an energy center point, and the radial component of the displacement of the energy center point directly reflects the shaft deviation, that is, the concentricity deviation value of the main shaft of the dynamometer 100 and the fixed support 200 can be quickly detected.

[0046] Further, with reference to Figs. 1-2 The centering measuring device of the coaxial drive axle test bench further comprises a coupling 7 and a detection sensor 8, one end of the coupling 7 is connected to the connecting shaft 1, the other end of the coupling 7 is connected to the main shaft of the dynamometer 100, the detection sensor 8 is arranged as a torque sensor, the detection sensor 8 is fixedly connected between the coupling 7 and the main shaft of the dynamometer 100, and the detection sensor 8 is used for detecting the torque of the main shaft of the dynamometer 100, so as to ensure the assembly precision and reliability.

[0047] Further, with reference to Figs. 1-2The adjusting member 4 comprises a supporting part 41 and a rotating part 42, the supporting part 41 is arranged between the test table 300 and the dynamometer 100, the rotating part 42 is arranged through the bottom of the dynamometer 100 and can rotate relative to the test table 300, so that the dynamometer 100 can move along the axis direction of the rotating part 42. Specifically, the laser beam emitted by the emitter 31 is projected on the target photoelectric dot array of the receiver 32 to form an energy center point, that is, the concentricity deviation value of the main shaft of the dynamometer 100 and the fixed support 200 can be quickly detected, when the deviation is large, the rotating supporting part 41 is rotated, the rotating part 42 can rotate relative to the test table 300, the dynamometer 100 can be lifted along the vertical height direction, the axis direction of the rotating part 42 is consistent with the vertical height direction, so that the concentricity of the main shaft of the dynamometer 100 and the fixed support 200 is adjusted, the error is smaller, from 0.05mm to 0.01mm, the precision range of the concentricity is improved.

[0048] Further, continuing to refer to Figs. 1-2 The centering measuring device of the coaxial drive axle test table further comprises a sliding part 9 and a sliding rail 10, the sliding rail 10 is fixedly arranged on the test table 300, and the sliding part 9 is arranged on the bottom of the dynamometer 100 and is slidingly arranged on the sliding rail 10. Specifically, the sliding part 9 is arranged in a structure capable of being nested with the sliding rail 10, the dynamometer 100 can slide relative to the test table 300 by sliding the sliding part 9 on the sliding rail 10, so that the distance between the main shaft of the dynamometer 100 and the fixed support 200 is adjusted.

[0049] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centering measuring device for a test bench of a coaxial drive axle, for measuring the concentricity of a main shaft of a dynamometer (100) and a fixed support (200), said fixed support (200) and said dynamometer (100) being mounted to a test bench (300), characterized in that, The coaxial drive axle test bench centering measuring device comprises: A connecting shaft (1) which is rotatably arranged in the fixed support (200) and connected to the main shaft of the dynamometer (100); A centering assembly comprising a centering tool (21) arranged in the fixed support (200) and a centering shaft (22) rotatably arranged in the connecting hole of the centering tool (21) and connected to the connecting shaft (1); A measuring assembly comprising a transmitter (31) arranged on the centering shaft (22) and a receiver (32) arranged on the main shaft of the dynamometer (100), the transmitter (31) emits a laser beam to the target center of the receiver (32) and is used for centering between the main shaft of the dynamometer (100) and the fixed support (200); An adjusting member (4) arranged at the bottom of the dynamometer (100) and used for adjusting the height of the dynamometer (100) relative to the test bench (300).

2. The alignment measurement device for a test stand of a coaxial drive axle according to claim 1, characterized in that The coaxial drive axle test bench centering measuring device further comprises a positioning pin (5) and a flange plate (6), the flange plate (6) is fixedly arranged on the fixed support (200), the flange plate (6) is provided with a positioning hole, the centering tool (21) is provided with a through hole, and the positioning pin (5) passes through the through hole and is connected to the positioning hole.

3. The alignment measurement apparatus for a coaxial drive axle test stand of claim 1, wherein, The centering assembly further comprises a centering bearing (23) fixedly sleeved on the outer periphery of the centering shaft (22), and the outer ring of the centering bearing (23) is fixedly connected to the inner wall of the connecting hole of the centering tool (21).

4. The alignment measurement apparatus for a coaxial drive axle test stand of claim 1, wherein, The centering tool (21) is provided with a light transmission hole configured for the laser beam emitted by the transmitter (31) to pass through.

5. The alignment measurement device of claim 4, wherein, The number of the light transmission holes is multiple, and the multiple light transmission holes are arranged at intervals along the circumferential direction of the centering shaft (22).

6. The alignment measurement apparatus for a coaxial drive axle test stand of claim 1, wherein, The central axis of the connecting shaft (1) coincides with the central axis of the main shaft of the dynamometer (100).

7. The alignment measurement apparatus of the test stand for coaxial drive axles according to claim 1, characterized in that The coaxial drive axle test bench centering measuring device further comprises a coupling (7), one end of the coupling (7) is connected to the connecting shaft (1), and the other end of the coupling (7) is connected to the main shaft of the dynamometer (100).

8. The centering measuring device of a test bench for coaxial drive axles according to claim 7, characterized in that The coaxial drive axle test bench centering measuring device further comprises a detection sensor (8) fixedly connected between the coupling (7) and the main shaft of the dynamometer (100), and the detection sensor (8) is used for detecting the torque of the main shaft of the dynamometer (100).

9. The alignment measurement apparatus of the test stand for coaxial drive axles according to claim 1, characterized in that The adjusting member (4) comprises a supporting part (41) arranged between the test bench (300) and the dynamometer (100) and a rotating part (42) rotatably arranged at the bottom of the dynamometer (100) and capable of rotating relative to the test bench (300), so that the dynamometer (100) can move along the axis direction of the rotating part (42).

10. The alignment measurement device of the test stand for coaxial drive axles according to claim 1, characterized in that The centering measuring device of the coaxial drive axle test bench further comprises a sliding piece (9) and a sliding rail (10), the sliding rail (10) is fixedly arranged on the test bench (300), and the sliding piece (9) is arranged at the bottom of the dynamometer (100) and is slidingly arranged on the sliding rail (10).

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