WO2020108469A1

WO2020108469A1 - Rotary encoder testing device

Info

Publication number: WO2020108469A1
Application number: PCT/CN2019/120863
Authority: WO
Inventors: 刘元江; 周忠厚; 刘元宜
Original assignee: 歌尔股份有限公司
Priority date: 2018-11-29
Filing date: 2019-11-26
Publication date: 2020-06-04
Also published as: CN109520528A

Abstract

A rotary encoder testing device comprises a machine frame and a motor (7), installed on the machine frame, comprising a coaxially disposed first output shaft (71) and a second output shaft (72) . The first output shaft (71) and the second output shaft (72) of the motor (7) are coaxially disposed, the first output shaft (71) of the motor is connected to one end of a drive shaft (3) via a shaft coupler (5), and the first output shaft (71) directly drives the drive shaft (3). The other end of the drive shaft (3) is used to fixedly connect an encoder disk (21) of a sample encoder. A reading head (22) of the sample encoder is disposed opposite to the encoder disk (21) of the sample encoder and fixedly connected to the machine frame. The position of the reading head (22) of the sample encoder can be swapped with the position of the encoder disk (21) thereof. The second output shaft (72) is fixedly connected to an encoder disk (91) of a reference encoder. A reading head (92) of the reference encoder fixedly provided at an inner wall of a motor cap (10) is disposed opposite to the encoder disk (91) of the reference encoder. The position of the encoder disk (91) of the reference encoder can be swapped with the position of the reading head (92) thereof. The first output shaft (71), the second output shaft (72), and the drive shaft (3) are on the same axis so as to effectively reduce testing errors, while enabling precision testing of both a sample encoder (2) and a reference encoder (9).

Description

Rotary encoder test device

Technical field

The invention belongs to the technical field of encoder testing equipment, and in particular relates to a rotary encoder testing device.

Background technique

As shown in FIG. 1, in the prior art, the accuracy test for rotary encoders in the current industry is usually a motor that drives a sample rotary encoder 2 through a synchronous belt variable speed drive 17 of a belt transmission speed change system, in which the reference encoder 9 rotates on the motor On 7, the sample encoder 2 is installed on the test shaft, and the accuracy of the sample encoder 2 is judged by comparing the output position angles of the two encoders. Due to the elasticity of the timing belt and the installation gap, the stability of the test results is poor, and the test accuracy is also affected.

Summary of the invention

The technical problem to be solved by the present invention is to provide a rotary encoder test device, which can improve the test accuracy and test stability of the rotary encoder.

To solve the above technical problems, the technical solution of the present invention is:

Rotary encoder test device, the rotary encoder test device includes a frame, a motor is installed on the frame, the motor includes a coaxial line output shaft one and output shaft two; the output shaft one is connected The shaft is connected to one end of the drive shaft, and the other end of the drive shaft is used to fixedly connect the sample encoder code wheel of the sample rotary encoder, the sample encoder reading head of the sample rotary encoder and the sample rotary encoder The encoder disc of the sample encoder is oppositely arranged and fixedly connected to the frame; or, the other end of the drive shaft is used to fixedly connect the sample encoder reading head of the sample rotary encoder, the sample The sample encoder code wheel of the rotary encoder is arranged opposite to the sample encoder reading head of the sample rotary encoder and fixedly connected to the frame; the reference encoder is fixedly connected to the output shaft two A reference encoder code wheel, the reference encoder code wheel is relatively provided with a reference encoder reading head, the reference encoder reading head is fixedly arranged on the inner wall of the motor cover of the motor; or, the output shaft is fixedly connected The reference encoder reading head with a reference encoder is relatively provided with the reference encoder code wheel, and the reference encoder code wheel is fixedly arranged on the inner wall of the motor cover of the motor.

Further, the rotary encoder testing device further includes a pitch adjustment shaft, the other end of the drive shaft is an internal hollow structure, and one end of the pitch adjustment shaft is inserted into the internal hollow structure, the pitch adjustment shaft The other end of is used for fixedly connecting the sample encoder code wheel or the sample encoder reading head.

Further, a radial positioning pin shaft hole is provided on the driving shaft, and a positioning pin shaft for positioning the spacing adjustment shaft is provided in the positioning pin shaft hole.

Further, the sample encoder code wheel is fixedly connected to the spacing adjustment shaft through the sample encoder code wheel base.

Further, the reference encoder code wheel is fixedly connected to the output shaft two through a reference encoder code wheel base.

Further, the rack includes a fixedly connected motor mounting bracket and a bracket, the motor is fixedly mounted on one side of the motor mounting bracket, and the bracket is fixedly mounted on the other side of the motor mounting bracket, The sample encoder reading head or the sample encoder code wheel is fixedly connected to the bracket.

Further, a bracket protrusion is provided at an end of the bracket, and the sample encoder reading head or the sample encoder code disk is fixedly connected to the bracket protrusion.

Further, the bracket is provided integrally with the bracket protrusion.

Further, the sample encoder reading head or the sample encoder code disk and the bracket protrusion are fixedly connected by screws.

Due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

The motor of the rotary encoder test device is installed on the frame, and the output shaft 1 of the motor and the output shaft 2 are coaxially arranged. The output shaft 1 of the motor is connected to one end of the drive shaft through the coupling and connected through the coupling. The output shaft of the motor directly drives the drive shaft, effectively reducing errors. The other end of the drive shaft is used to fix the sample encoder code wheel connected to the sample rotary encoder. The sample encoder reading head is arranged opposite to the sample encoder code wheel and fixedly connected to the frame; or, the other end of the drive shaft is used to fix The sample encoder reading head connected to the sample rotary encoder, the sample encoder disc is set opposite to the sample encoder reading head and fixedly connected to the frame. The reference encoder code wheel is fixedly connected to the reference encoder on the output shaft two, and the reference encoder code wheel is relatively provided with a reference encoder reading head, and the reference encoder reading head is fixedly arranged on the inner wall of the motor cover of the motor; or, the output shaft Secondly, the reference encoder reading head fixedly connected with the reference encoder, the reference encoder reading head is relatively provided with a reference encoder code wheel, and the reference encoder code wheel is fixedly arranged on the inner wall of the motor cover of the motor. The output shaft 1, output shaft 2 and drive shaft of the rotary encoder test device are all on the same axis, which effectively reduces the test error, and enables the test device to test the accuracy of the sample encoder and the reference encoder The accuracy is tested.

The rotary encoder test device also includes a pitch adjustment shaft. The output shaft of the motor is connected to one end of the drive shaft through a coupling, the other end of the drive shaft is an internal hollow structure, and one end of the pitch adjustment shaft is inserted into the internal hollow structure. The other end of the pitch adjustment shaft is used to fixedly connect the sample encoder code wheel or the encoder reading head. When testing the accuracy of different sample rotary encoders, the sample encoder code wheel and sample code of the different sample rotary encoder The distance between the sensor reading heads is different, and the distance between the sample encoder disc and the sample encoder reading head can be adjusted by the length of the spacing adjustment shaft extending out of the drive shaft to achieve the universality of the sample rotary encoder test device.

BRIEF DESCRIPTION

FIG. 1 is a perspective view of a conventional rotary encoder testing device;

2 is an exploded view of the rotary encoder test device of the present invention;

3 is a cross-sectional view taken along line A-A of FIG. 2 after assembly;

4 is a cross-sectional view taken along the line B-B in FIG. 3;

5 is a schematic structural view of the use state of the rotary encoder test device of the present invention;

In the picture, 1-pitch adjustment shaft, 2-sample rotary encoder, 21-sample encoder code wheel, 22-sample encoder reading head, 3-drive shaft, 31-positioning pin shaft hole, 32-internal hollow structure, 4-bracket, 41-bracket projection, 5-coupling, 6-motor mounting bracket, 7-motor, 71-output shaft one, 72-output shaft two, 8-spacer, 9-reference encoder , 91-reference encoder code wheel, 92-reference encoder read head, 10-motor cover, 11-sample encoder code wheel base, 12-reference encoder code wheel base, 13-drive one, 14-drive two, 15-comparison display system, 16-wire, 17-belt drive transmission, 18-screw, 19-bearing.

detailed description

The present invention will be further described below with reference to the drawings and embodiments.

As shown in conjunction with FIGS. 2, 3, 4 and 5, a rotary encoder testing device includes a frame, and a motor 7 is installed on the frame, and the motor 7 includes an output shaft 71 arranged coaxially和Output轴二72.

The output shaft 71 is connected to one end of the drive shaft 3 through the coupling 5, the drive shaft 3 is mounted on the bearing 19, and a spacer 8 is sleeved on the drive shaft 3 to prevent the axial movement of the output shaft 71. The other end of the drive shaft 3 is used to fixedly connect the sample encoder code wheel 21 of the sample rotary encoder 2, and the other end of the drive shaft 3 is fixedly connected to the sample encoder wheel 21 of the sample rotary encoder 2, the sample rotary encoder The code wheel 21 and the drive shaft 3 can be fixedly connected by interference fit, or fixedly connected by glue connection, and of course, can also be connected by other conventional detachable connection methods. The sample encoder code wheel 21 is oppositely provided with a sample encoder reading head 22, and the sample encoder reading head 22 can be fixedly connected to the rack by screws.

Alternatively, the other end of the drive shaft 3 is used to fixedly connect the sample encoder reading head 22 of the sample rotary encoder 2, the sample encoder code wheel 21 of the sample rotary encoder 2 and the sample encoder reading head 22 of the sample rotary encoder 2 Relatively arranged and fixedly connected to the rack, the sample encoder code wheel 21 can be fixedly connected to the rack by screws.

A reference encoder code wheel 91 of the reference encoder 9 is fixedly connected to the output shaft two 72. The reference encoder code wheel 91 is preferably fixedly connected to the output shaft two 72 via the reference encoder code wheel base 12. The reference encoder code wheel 91 is oppositely provided with a reference encoder reading head 92, and the reference encoder reading head 92 may be fixed on the inner wall of the motor cover 10 of the motor 7 by screws.

Alternatively, the reference encoder reading head 92 of the reference encoder 9 is fixedly connected to the output shaft two 72, and the reference encoder reading head 92 is oppositely provided with a reference encoder code wheel 91, and the reference encoder code wheel 91 can be fixedly set by screws. The inner wall of the motor cover 10 of the motor 7.

The rotary encoder test device further includes a pitch adjustment shaft 1, the other end of the drive shaft 3 is an internal hollow structure 32, one end of the pitch adjustment shaft 1 is inserted into the internal hollow structure 32, and the other end of the pitch adjustment shaft 1 is used for fixed connection The sample encoder code wheel 21 or the sample encoder reading head 22, and the sample encoder code wheel 21 or the sample encoder reading head 22 are fixedly connected to the other end of the pitch adjustment shaft 1. The sample encoder code wheel 21 can be fixedly connected by interference fit, or fixedly connected by glue connection, and of course, can also be connected by other conventional detachable connection methods.

The driving shaft 3 is provided with a radial positioning pin shaft hole 31, and a positioning pin shaft for positioning the pitch adjustment shaft 1 is provided in the positioning pin shaft hole 31. After adjusting the length of the distance adjustment shaft 1 extending beyond the drive shaft 3, use the positioning pin shaft to position the distance adjustment shaft 1 to prevent the axial movement of the distance adjustment shaft 1. The sample encoder code wheel 21 is preferably fixedly connected to the pitch adjustment shaft 1 through the sample encoder code wheel base 11.

The frame includes a fixed motor mounting frame 6 and a bracket 4, the motor 7 is fixedly mounted on one side of the motor mounting frame 6, the bracket 4 is fixedly mounted on the other side of the motor mounting frame 6, the sample encoder reading head 22 or The sample encoder code wheel 21 is fixedly connected to the bracket 4.

The bracket 4 is preferably provided with a bracket protrusion 41, and two bracket protrusions 41 are preferably provided symmetrically, and the bracket 4 and the bracket protrusion 41 are preferably provided integrally. The sample encoder reading head 22 or the sample encoder code wheel 21 is preferably fixedly connected to the end of the bracket protrusion 41 by screws 18.

The technical features with serial numbers named in this manual (such as output shaft one, output shaft two, etc.) are just to distinguish the technical features, and do not represent the positional relationship, installation order and working order between the technical features Wait.

The following describes the process of testing the accuracy of the sample encoder using the rotary encoder testing device of the present invention:

The operator installs the sample encoder code wheel 21 of the sample rotary encoder 2 at the end of the pitch adjustment shaft 1, and installs the sample encoder reading head 22 of the sample encoder 2 at the end of the bracket protrusion 41 through the screw 18 By adjusting the position of the pitch adjustment shaft 1 in the internal hollow structure 32 of the drive shaft 3, the distance between the sample encoder code wheel 21 and the sample encoder reading head 22 is adjusted. The sample rotary encoder 2 and the drive one 13 are electrically connected through the wire 16, the reference encoder 9 and the drive two 14 are electrically connected through the wire 16, and at the same time, the drive one 13 and the drive two 14 are electrically connected to the comparison display system 15 through the wire 16 . The pulse signals of the two reading heads are converted into angle signals by their respective drivers, and the measurement values and measurement differences of the two encoders are output through the comparison and display system 15 to determine the rotation of the test sample according to the preset difference range The accuracy of the encoder 2. The above test process is common knowledge for those skilled in the art, and will not be repeated here.

The following describes the process of testing the accuracy of the reference encoder using the rotary encoder testing device of the present invention in detail:

The operator installs the encoder code wheel of the rotary encoder with higher accuracy than the reference encoder 9 at the end of the pitch adjustment shaft 1 and installs the encoder reading head on the bracket protrusion 41 through the screw 18. The rotary encoder and the driver one 13 are electrically connected through the wire 16, the reference encoder 9 and the driver two 14 are electrically connected through the wire 16, and at the same time, the driver one 13 and the driver two 14 are electrically connected to the comparison display system 15 through the wire 16. The pulse signals of the two reading heads are converted into angle signals by their respective drivers, and the measured values and measured differences of the two encoders are output through the comparison and display system 15, and the reference encoder can be discriminated based on the preset difference range 9 precision accuracy. The above test process is common knowledge for those skilled in the art, and will not be repeated here.

In the description of this specification, it should be understood that the orientation or positional relationship described by the "inner wall" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the described embodiments are only a part of the embodiments of the present invention rather than all the embodiments. These are merely examples. The scope of protection is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without any creative work without departing from the principles and essence of the present invention, but these changes and modifications fall into the present invention Scope of protection.

Claims

Rotary encoder test device, the rotary encoder test device includes a frame, a motor is mounted on the frame, characterized in that:

The motor includes an output shaft one and an output shaft two arranged coaxially;

The output shaft is connected to one end of the drive shaft through a coupling, and the other end of the drive shaft is used to fixedly connect the sample encoder code wheel of the sample rotary encoder, and the sample encoder reading head of the sample rotary encoder Arranged opposite to the sample encoder code wheel of the sample rotary encoder and fixedly connected to the frame; or, the other end of the drive shaft is used to fixedly connect the sample code of the sample rotary encoder Reading head, the sample encoder code wheel of the sample rotary encoder and the sample encoder reading head of the sample rotary encoder are oppositely arranged and fixedly connected to the frame;

A reference encoder code wheel is fixedly connected to the reference encoder on the second output shaft, and the reference encoder code wheel is relatively provided with a reference encoder reading head, and the reference encoder reading head is fixedly arranged on the motor of the motor The inner wall of the cover; or, the reference encoder reading head to which a reference encoder is fixedly connected to the output shaft two, the reference encoder reading head is relatively provided with the reference encoder code wheel, the reference encoder code The disc is fixedly arranged on the inner wall of the motor cover of the motor.
The rotary encoder test device according to claim 1, wherein the rotary encoder test device further comprises a pitch adjustment shaft, the other end of the drive shaft is an internal hollow structure, and one end of the pitch adjustment shaft is inserted Connected to the internal hollow structure, the other end of the spacing adjustment shaft is used to fixedly connect the sample encoder code wheel or the sample encoder reading head.
The rotary encoder test device according to claim 2, wherein the drive shaft is provided with a radial positioning pin shaft hole, and the positioning pin shaft hole is provided with a positioning for positioning the spacing adjustment shaft Pin.
The rotary encoder test device according to claim 2, wherein the sample encoder code wheel is fixedly connected to the pitch adjustment shaft through a sample encoder code wheel base.
The rotary encoder testing device according to claim 1, wherein the reference encoder code wheel is fixedly connected to the output shaft two through a reference encoder code wheel base.
The rotary encoder test device according to claim 1, wherein the frame includes a fixed motor mounting bracket and a bracket, the motor is fixedly mounted on one side of the motor mounting bracket, and the bracket The rack is fixedly installed on the other side of the motor mounting rack, and the sample encoder reading head or the sample encoder code wheel is fixedly connected to the bracket.
The rotary encoder test device according to claim 6, wherein a bracket protrusion is provided at an end of the bracket, and the sample encoder reading head or the sample encoder code wheel is fixedly connected to the The bracket is raised.
The rotary encoder test device according to claim 7, wherein the bracket is integrally provided with the bracket protrusion.
The rotary encoder testing device according to claim 8, wherein the sample encoder reading head or the sample encoder code wheel and the bracket protrusion are fixedly connected by screws.