Detection device

Abstract

This application relates to the field of testing tooling technology and discloses a testing device for testing encoders under test. The testing device includes a connecting shaft, a driving component, and multiple adapters. One end of the connecting shaft is used to connect to a reference encoder, and the other end of the connecting shaft is used to selectively and detachably connect to one of the adapters. Each adapter is used to connect to a corresponding encoder under test, and the types of encoders connected to each adapter are different. The driving component is connected to the connecting shaft and is used to drive the connecting shaft to rotate. The beneficial effect of this application is to improve the versatility of the testing device.

Description

Technical Field

[0001] This application relates to the field of testing tooling technology, specifically to testing devices. Background Technology

[0002] Angle encoders require accuracy testing in practical applications. Some products are equipped with multiple different types of angle encoders, but some known testing fixtures cannot achieve accuracy testing for all types of angle encoders, resulting in a lack of versatility. Utility Model Content

[0003] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a detection device to solve the technical problem of low versatility of detection devices in the known technology.

[0004] To achieve the above-mentioned technical objectives, this application adopts the following technical solution:

[0005] This application provides a testing device for testing an encoder under test. The testing device includes a connecting shaft, a driving component, and multiple adapters. One end of the connecting shaft is used to connect to a reference encoder, and the other end of the connecting shaft is used to selectively and detachably connect to one of the adapters. Each adapter is used to connect to a corresponding encoder under test, and the types of encoders under test connected to each adapter are different. The driving component is connected to the connecting shaft and is used to drive the connecting shaft to rotate.

[0006] In some embodiments, the adapter includes a disassembly portion and a connecting portion. The disassembly portion is detachably connected to the connecting shaft, and the connecting portion is connected to the end of the disassembly portion opposite to the connecting shaft. The connecting portion is used to connect the rotor of the encoder under test.

[0007] In some embodiments, the end face of the connecting shaft forms a connecting groove; the disassembly and assembly parts of each adapter have the same structure, and one end of the disassembly and assembly part opposite to the connecting part extends into the connecting groove and is threadedly connected to the connecting shaft.

[0008] In some embodiments, along the axial direction of the connecting shaft, a first fixing surface is formed at one end of the adapter opposite to the connecting shaft, the first fixing surface being used to fix the rotor of the encoder under test to the encoder under test.

[0009] In some embodiments, the encoder under test includes a rotor under test, the rotor under test has a fixing hole, and the outer peripheral surface of the adapter opposite to the connecting shaft has a second fixing surface, the second fixing surface being used to extend into the fixing hole and connect with the rotor under test of the encoder under test.

[0010] In some embodiments, the adapter has a first centerline and the connecting shaft has a second centerline, the first centerline and the second centerline being substantially coincident.

[0011] In some embodiments, the detection device further includes a base with a mounting hole, the connecting shaft being rotatably disposed in the mounting hole, the adapter being located on one side of the base along the axial direction of the connecting shaft, and the drive being located on the other side of the base along the axial direction of the connecting shaft.

[0012] In some embodiments, the encoder under test includes a stator and a rotor under test, and the adapter is used to connect the rotor under test; the reference encoder includes a reference stator and a reference rotor, and the reference rotor is connected to the connecting shaft; the detection device further includes a first bracket and a plurality of second brackets, the first bracket is connected to one side of the base along the axial direction of the connecting shaft, and the first bracket is used to connect the reference stator; the second bracket is used to connect the stator under test, and the other side of the base is used to selectively connect one of the second brackets.

[0013] In some embodiments, the first bracket abuts against one end of the connecting shaft along the axial direction, and the second bracket abuts against the other end of the connecting shaft along the axial direction.

[0014] In some embodiments, the detection device further includes two bearings, which are spaced apart along the axial direction of the mounting hole. The two ends of the connecting shaft pass through the bearings respectively, and the outer peripheral surface of the connecting shaft is spaced apart from the inner peripheral surface of the mounting hole.

[0015] Compared with known technologies, the testing device provided in this application connects the encoder under test to the connecting shaft via a corresponding adapter, and connects the reference encoder to the connecting shaft. A drive unit rotates the connecting shaft, causing the encoder under test and the reference encoder to run synchronously. The accuracy of the encoder under test relative to the reference encoder can then be determined based on the output angles of the encoder under test and the reference encoder. When facing testing requirements for different models of encoders under test, only the corresponding adapter needs to be replaced, thus significantly improving the versatility of the testing device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a detection device provided in an embodiment of this application.

[0017] Figure 2 yes Figure 1 A cross-sectional view of the detection device along the radial direction perpendicular to the connecting axis.

[0018] Figure 3This is a schematic diagram comparing the angle curves of the encoder under test and the reference encoder output during the operation of the detection device provided in one embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the angle difference curve output during the operation of the detection device provided in one embodiment of this application.

[0020] Figure 5 yes Figure 2 A magnified schematic diagram of the structure at point II.

[0021] Figure 6 yes Figure 2 A magnified schematic diagram of the structure at point III.

[0022] Figure 7 This is a schematic diagram of the structure of an adapter provided in one embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the structure of the first bracket and the reference encoder provided in an embodiment of this application.

[0024] Figure 9 This is a three-dimensional structural schematic diagram of a detection device provided in another embodiment of this application.

[0025] Figure 10 yes Figure 9 A cross-sectional view of the detection device along the radial direction perpendicular to the connecting axis.

[0026] Figure 11 yes Figure 10 A magnified schematic diagram of the structure at point V in the middle.

[0027] Figure 12 This is a three-dimensional structural schematic diagram of a detection device provided in another embodiment of this application.

[0028] Figure 13 yes Figure 12 A cross-sectional view of the detection device along the radial direction perpendicular to the connecting axis.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Detection device; 110. Connecting shaft; 111. Second centerline; 112. Connecting groove; 1121. Positioning groove section; 1122. Connecting groove section; 113. First shaft section; 114. Second shaft section; 115. Third shaft section; 116. Fourth shaft section; 117. Connecting shaft section; 120. Drive component; 121. Handwheel; 1211. Mounting part; 12111. First mounting groove; 122. Motor; 1221. Output shaft; 123. Coupling; 1231. Second mounting groove; 130. Adapter; 131. Disassembly / assembly part; 1311. Positioning section; 1312. Connecting section; 132. Connecting part; 1321. First fixing surface; 13211. Fixing groove; 1322. Second fixing surface; 133. 134. First centerline; 145. Abutment flange; 146. Base; 147. Mounting hole; 158. Gasket; 159. Fixing element; 150. Bearing; 150. Bushing; 161. First support; 162. Clearance hole; 163. Support part; 170. Second support; 171. Second abutment; 172. Connecting flange; 173. First clearance hole; 174. Bottom wall; 1741. Second clearance hole; 175. Enclosure wall; 180. Base plate; 190. Motor bracket; 200. Encoder under test; 210. Rotor under test; 220. Stator under test; 221. Fixing hole; 300. Reference encoder; 310. Reference rotor; 320. Reference stator; X: Axial; Y: Radial. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] To address the technical problem that some known detection devices lack versatility when detecting the accuracy of angle encoders, this application provides a detection device that can meet the detection requirements of various angle encoders and has high versatility.

[0033] Some known automated robots typically move via joint mechanisms. To detect the angles of movement at various joints, angle encoders are usually installed at the corresponding joints to acquire real-time angle changes. Before being installed on the joints, the angle encoders need to be tested for accuracy to ensure accurate angle detection. However, different robot types and varying joint structures within the same robot necessitate the installation of multiple different angle encoders. Some known angle encoder testing fixtures cannot accurately detect the angles of multiple encoders, resulting in a lack of versatility.

[0034] It should be noted that the detection device described in this application is used for, but not limited to, the detection of angle encoders at robot joints. For ease of explanation, this application will only use the detection device applied to the detection of angle encoders at robot joints as an example. The principle of the detection device applied to other types of equipment (such as automated equipment, precision instruments, and aerospace equipment) is essentially the same as that applied to angle encoders at robot joints, and will not be elaborated here.

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of the detection device 100 in one embodiment of this application. See also: Figure 2 The detection device 100 includes a connecting shaft 110, a drive component 120, and multiple adapter components 130. One end of the connecting shaft 110 is used to connect to a reference encoder 300, and the other end of the connecting shaft 110 is used to selectively and detachably connect to one of the adapter components 130. Each adapter component 130 is used to connect to a corresponding encoder under test 200, and the types of encoders under test 200 connected to each adapter component 130 are different. The drive component 120 is connected to the connecting shaft 110 and is used to drive the connecting shaft 110 to rotate.

[0036] According to the detection device 100 of this embodiment, the encoder 200 to be tested is connected to the connecting shaft 110 via a corresponding adapter 130, and the reference encoder 300 is connected to the connecting shaft 110. The connecting shaft 110 is driven to rotate by the driving component 120, causing the encoder 200 to be tested and the reference encoder 300 to run synchronously. The accuracy of the encoder 200 to be tested compared to the reference encoder 300 can be determined based on the output angles of the encoder 200 and the reference encoder 300. When facing the detection requirements of different models of encoders 200 to be tested, only the corresponding adapter 130 needs to be replaced, thereby greatly improving the versatility of the detection device 100.

[0037] Furthermore, when faced with the testing requirements of various encoders 200 under test, only the corresponding adapter 130 needs to be processed, while components such as the connecting shaft 110 and the drive component 120 do not need to be replaced. This can reduce the overall cost of the testing device 100, reduce the number of parts in the testing device 100, and reduce the size of the testing device 100.

[0038] In addition, see Figure 3 By driving the connecting shaft 110 to rotate continuously via the drive component 120, the reference encoder 300 can output a continuous curve of time versus reference angle, and the encoder under test 200 can output a continuous curve of time versus angle under test. Operators can quickly perform accuracy testing on the encoder under test 200 by comparing and analyzing the two curves, thus achieving continuous angular deviation detection across the entire range.

[0039] The reference encoder 300 can be a known 24-bit angle encoder with an accuracy of 0.01°, which features high accuracy, low cost and small size.

[0040] Specifically, both the reference encoder 300 and the encoder under test 200 are connected to a host computer to provide real-time feedback of the angles detected by both to the host computer software. The host computer software displays continuous curves of time versus reference angle and time versus measured angle, with time on the horizontal axis and the detected angle on the vertical axis, allowing operators to observe continuous angle deviations across the entire real-time range. See also... Figure 4 The host computer software can also display the calculated angle deviation as a curve in the form of time-angle deviation, so that the operator can intuitively observe the accuracy of the encoder 200 under test.

[0041] The host computer can include a microcontroller and a computer. The microcontroller and computer communicate via a serial port. The computer is used to install the host computer software to display the detection curve on a monitor. The reference encoder 300 can transmit data to the microcontroller via RS485 serial communication, with a sampling frequency of up to 2000Hz. The encoder under test 200 can transmit data to the microcontroller via various communication methods such as RS485 serial communication, CAN, and IIC. The microcontroller collects the raw values ​​of the data output by the two encoders, verifies and parses them into angle values ​​output by the two encoders. The microcontroller uploads the angle values ​​of the two encoders together to the host computer software on the computer at a fixed frequency. The display interface shows the two angle values ​​in real time and connects the points of the angle values ​​to form an angle change curve. The horizontal axis represents the number of sampling points, and the vertical axis is in degrees.

[0042] In this embodiment, see Figure 2 The detection device 100 also includes a base 140. The base 140 has a mounting hole 141, and the connecting shaft 110 is rotatably disposed in the mounting hole 141. The adapter 130 is located on the X-axis side of the base 140 along the connecting shaft 110, and the drive member 120 is located on the other side of the base 140 along the X-axis of the connecting shaft 110.

[0043] Thus, the base 140 can provide stable support for the connecting shaft 110, and the mounting hole 141 can provide radial Y-limiting for the connecting shaft 110, so as to greatly reduce the radial Y-running of the connecting shaft 110 during the driven rotation process, and ensure that the rotational power is accurately transmitted to the reference encoder 300 and the encoder under test 200 through the connecting shaft 110, thereby improving the detection accuracy.

[0044] In one embodiment, the base 140, the connecting shaft 110, and the adapter 130 can all be made of aluminum alloy to ensure transmission accuracy and reduce the cost of the detection device 100.

[0045] In this embodiment, see Figure 5 The encoder under test 200 includes a rotor under test 210 and a sensor under test 220. An adapter 130 is used to connect the rotor under test 210. See also... Figure 6 The reference encoder 300 includes a reference rotor 310 and a reference stator 320. The reference rotor 310 is connected to a connecting shaft 110. The rotor to be measured 220 is connected to one end of a base 140 along the axial direction X. The reference stator 320 is connected to the other end of the base 140 along the axial direction X. By driving the connecting shaft 110 to rotate through the driving member 120, the reference rotor 310 can rotate relative to the reference stator 320, and the rotor to be measured 210 can rotate relative to the rotor to be measured 220, thereby realizing the output rotation angle of the reference encoder 300 and the output rotation angle of the encoder to be measured 200.

[0046] In one embodiment, the mounting direction of the encoder under test 200 is opposite to that of the reference encoder 300. When the connecting shaft 110 drives the reference rotor 310 and the rotor under test 210 to rotate, the rotation direction of the rotor under test 210 is opposite to that of the reference rotor 310. During data acquisition, the rotation direction of the reference rotor 310 is used as the reference. Furthermore, during initial power-on, if the direction of the encoder under test 200 is inconsistent with that of the reference encoder 300, and there is an initial angle deviation between the two, in order to calibrate the difference between the encoder under test 200 and the reference encoder 300, the angle value of the encoder under test 200 needs to be converted accordingly, and the detection angle value of the encoder under test 200 cannot be directly compared with the angle value of the reference encoder 300. The specific conversion process is as follows: Definition This is the initial angle value of the encoder under test 200 when it is powered on. This value is a constant and is recorded by the microcontroller before each test begins. (Definition) This refers to the real-time angle value of the encoder under test 200 during the detection process, which is transmitted to the microcontroller in real time. (Definition) For the microcontroller to transmit real-time angle values The calibrated angle value after calibration. Definition This is the initial angle value of the reference encoder 300 upon power-on. (Definition) The initial angle difference between the encoder under test 200 and the reference encoder 300 is given. , In the two formulas above, subtracting 360° or This allows us to obtain the angle values ​​of the encoder under test 200 and the reference encoder 300 in the same direction.

[0047] Furthermore, in one embodiment, a definition is provided. This refers to the angle value of the encoder under test (200°) displayed by the host computer software. For easier observation, it needs to be controlled... The range is between 0° and 360°, thus, in At that time, ;exist At that time, ;exist At that time, The above conditions can be used to calculate the result. Then The data is transmitted to the host computer software to display the angle curve of the encoder under test 200.

[0048] In this embodiment, see Figure 5 The adapter 130 includes a disassembly / assembly part 131 and a connecting part 132. The disassembly / assembly part 131 is detachably connected to the connecting shaft 110. The connecting part 132 connects to the end of the disassembly / assembly part 131 opposite to the connecting shaft 110, and is used to connect the rotor 210 of the encoder under test 200. Thus, each adapter 130 can be connected to the connecting shaft 110 via the disassembly / assembly part 131, and connected to the corresponding rotor 210 under test via the connecting part 132. The disassembly / assembly part 131 of each adapter 130 can be configured to be identical to facilitate the disassembly and assembly of each adapter 130.

[0049] In one embodiment, see Figure 2 The adapter 130 has a first centerline 133, and the connecting shaft 110 has a second centerline 111. The first centerline 133 and the second centerline 111 approximately coincide. Thus, after the rotor 210 under test is connected to the adapter 130, the concentricity between the rotor 210 under test and the reference rotor 310 can be further improved, thereby reducing detection errors and improving detection reliability.

[0050] In one embodiment, see Figure 5 A connecting groove 112 is formed on the end face of the connecting shaft 110. The center line of the connecting groove 112 roughly coincides with the second center line 111. The end of the disassembly / assembly part 131 facing away from the connecting part 132 extends into the connecting groove 112 and is threadedly connected to the connecting shaft 110. In this way, the ease of disassembly / assembly of the disassembly / assembly part 131 can be improved, while ensuring the reliability of the connection between the disassembly / assembly part 131 and the connecting shaft 110 can be guaranteed. In addition, the threaded connection method is conducive to making the center line of the disassembly / assembly part 131 roughly coincide with the center line of the connecting groove 112, thereby making the first center line 133 roughly coincide with the second center line 111, which takes into account both the connection and positioning functions.

[0051] In one embodiment, see Figure 5The connecting groove 112 includes a positioning groove section 1121 and a connecting groove section 1122. The inner diameter of the positioning groove section 1121 is larger than the inner diameter of the connecting groove section 1122. The positioning groove section 1121 is located at the end of the connecting groove section 1122 opposite to the driving member 120, and the positioning groove section 1121 is open. The disassembly / assembly part 131 includes a positioning section 1311 and a connecting section 1312. The positioning section 1311 abuts against the bottom surface of the positioning groove section 1121. The connecting section 1312 is threadedly connected to the connecting groove section 1122. Through the positioning engagement of the positioning section 1311 and the positioning groove section 1121, the positioning reliability between the disassembly / assembly part 131 and the connecting shaft 110 can be further improved.

[0052] In one embodiment, see Figure 5 The adapter 130 has an outwardly protruding abutment flange 134 formed along the radial direction Y of the connecting shaft 110. The detection device 100 also includes a gasket 151. The abutment flange 134 abuts against the gasket 151 at the end face of the connecting shaft 110. The gasket 151 can increase friction, thereby improving the reliability of the connecting shaft 110 driving the adapter 130 to rotate. In addition, the gasket 151 can also facilitate the adjustment of the distance between the rotor 220 to be tested and the rotor 210 to be tested.

[0053] In one embodiment, see Figure 5 One of the encoders under test 200 has a rotor 210 and a test element 220 distributed along the axial direction X of the connecting shaft 110. Along the axial direction X of the connecting shaft 110, the adapter 130 has a first fixing surface 1321 formed at the end opposite to the connecting shaft 110. The first fixing surface 1321 is used to fix the rotor 210 of the encoder under test 200. Thus, while the rotor 210 is connected to the first fixing surface 1321, the adapter 130 will not interfere with the installation of the test element 220. The first fixing surface 1321 is formed on the end face of the connecting portion 132 opposite to the disassembly portion 131.

[0054] Specifically, the first fixing surface 1321 has a fixing groove 13211. The center line of the fixing groove 13211 roughly coincides with the second center line 111 of the connecting shaft 110. In this way, the installation position accuracy of the rotor 210 under test can be ensured.

[0055] In one embodiment, see Figure 7 The connecting part 132 has a hexagonal cross section along the vertical first center line 133, so that the connecting part 132 can be operated with a wrench to realize the disassembly and assembly of the disassembly and assembly part 131 without damaging the rotor 210 under test in the fixing groove 13211, thus improving the ease of use.

[0056] In this embodiment, see Figure 5 and Figure 6The testing device 100 also includes a first bracket 160 and multiple second brackets 170. The first bracket 160 connects to the base 140 along the axial direction X of the connecting shaft 110 and is used to connect the reference stator 320. The second brackets 170 are used to connect the encoder 220 to be tested, and the other side of the base 140 is used to selectively connect one of the second brackets 170. In this way, the reference stator 320 is fixed by the first bracket 160, and the encoder 220 to be tested is fixed by the second brackets 170, so as to facilitate subsequent testing steps. In addition, when facing different models of encoders 200 to be tested, different second brackets 170 can be replaced to achieve the fixed installation of the encoder 200 to be tested.

[0057] In one embodiment, the first bracket 160 abuts against one end of the connecting shaft 110 along the axial direction X, and the second bracket 170 abuts against the other end of the connecting shaft 110 along the axial direction X. Thus, the cooperation of the first bracket 160 and the second bracket 170 limits the axial movement of the connecting shaft 110 along the axial direction X, significantly reducing the possibility of axial movement of the connecting shaft 110 and improving detection accuracy.

[0058] In one embodiment, see Figure 5 and Figure 6 The detection device 100 also includes two bearings 153. The two bearings 153 are spaced apart along the axial direction (X) of the mounting hole 141. Both ends of the connecting shaft 110 pass through the bearings 153, and the outer circumferential surface of the connecting shaft 110 is spaced apart from the inner circumferential surface of the mounting hole 141. In this way, the bearings 153 can support the connecting shaft 110. By creating a gap between the connecting shaft 110 and the mounting hole 141, the frictional force during the rotation of the connecting shaft 110 can be reduced, thereby improving the rotational accuracy of the connecting shaft 110 and reducing detection errors.

[0059] Specifically, please see again Figure 2The connecting shaft 110 includes a first shaft segment 113, a second shaft segment 114, and a third shaft segment 115. The third shaft segment 115 is located at the end of the mounting hole 141 near the drive member 120. The first shaft segment 113, the second shaft segment 114, and the third shaft segment 115 are connected sequentially along the axial direction X. The outer diameter of the first shaft segment 113 is the same as the outer diameter of the third shaft segment 115. The outer diameter of the second shaft segment 114 is larger than the outer diameter of the first shaft segment 113. The first shaft segment 113 passes through one of the bearings 153. The third shaft segment 115 passes through the other bearing 153. The two bearings 153 abut against both ends of the second shaft segment 114, respectively. A first bracket 160 forms a first abutment 161 extending into the mounting hole 141. A second bracket 170 forms a second abutment 171 extending into the mounting hole 141. The first abutment 161 abuts against the end face of one end of the second shaft segment 114 via a bearing 153. The second abutment 171 abuts against the end face of the other end of the second shaft segment 114 via another bearing 153. In this way, the first bracket 160 and the second bracket 170 reliably limit the axial X-axis of the connecting shaft 110.

[0060] In one embodiment, see Figure 2 and Figure 6 The connecting shaft 110 also includes a fourth shaft segment 116. The fourth shaft segment 116 connects to the third shaft segment 115. A portion of the fourth shaft segment 116 extends out of the mounting hole 141. The detection device 100 also includes a bushing 154. The bushing 154 is fitted onto the end of the fourth shaft segment 116 near the third shaft segment 115. The rotor of the reference encoder 300 is fitted onto the portion of the fourth shaft segment 116 extending out of the mounting hole 141 and is located at the end of the bushing 154 opposite to the first shaft segment 113. The end of the fourth shaft segment 116 opposite to the third shaft segment 115 is used to connect to the drive element 120.

[0061] In one embodiment, see Figure 6 The first bracket 160 has a clearance hole 162. One end of the connecting shaft 110 passes through the clearance hole 162. The portion of the connecting shaft 110 corresponding to the clearance hole 162 is used to connect the reference rotor 310 of the reference encoder 300. The drive member 120 is located at the end of the first bracket 160 away from the second bracket 170.

[0062] Optionally, the reference rotor 310 can be connected to the connecting shaft 110 via a threaded connection.

[0063] Specifically, see Figure 8 A support portion 163 protrudes from the surface of the clearance hole 162. The end of the support portion 163 facing away from the bearing 153 abuts against the reference stator 320 and is connected to the reference stator 320. In this way, the reference stator 320 can be reliably fixed.

[0064] In one embodiment, see Figure 5The second bracket 170 has a connecting flange 172 to securely connect the base 140. The second bracket 170 has a through first clearance hole 173. The end of the second bracket 170 facing away from the adapter 130 is connected to the rotor 220 to be measured. The fixing part extends into the first clearance hole 173. This further reduces the distance between the rotor 210 and the rotor 220 to be measured, making the distance between them the same as the distance in actual application, thereby improving detection accuracy.

[0065] See below. Figures 9 to 11 The encoder under test 200, adapter 130 and second bracket 170 of another embodiment of this example are described.

[0066] In this embodiment, the rotor 210 under test is located radially Y-inner to the encoder 220 under test. The rotor 210 under test has a fixing hole 221. A second fixing surface 1322 is formed on the outer peripheral surface of the end of the adapter 130 opposite to the connecting shaft 110. The second fixing surface 1322 extends into the fixing hole 221 and connects to the rotor 210 of the encoder 200 under test. Thus, while the rotor 210 under test is connected to the second fixing surface 1322, the adapter 130 does not interfere with the installation of the encoder 220 under test. The second fixing surface 1322 is formed on the outer peripheral surface of the connecting portion 132.

[0067] Specifically, the testing device 100 also includes a fixing member 152. The fixing member 152 extends through the rotor 210 under test along the radial direction Y of the connecting shaft 110, protruding from one end of the rotor 220 under test, and passes through the second fixing surface 1322 to connect to the adapter 130. The fixing member 152 may be constructed as a screw or a pin.

[0068] In other embodiments, the second fixing surface 1322 may also be configured to be threadedly connected to the rotor 210 under test. Therefore, there are various ways to achieve the connection between the second fixing surface 1322 and the rotor 210 under test, and this embodiment does not specifically limit them.

[0069] In this embodiment, the second bracket 170 includes a bottom wall 174 and a surrounding wall 175. The bottom wall 174 fits against the end face of the base 140 and connects to the base 140. The bottom wall 174 has a second clearance hole 1741. The adapter 130 passes through the second clearance hole 1741. The surrounding wall 175 extends along the axial direction X of the connecting shaft 110 in a direction away from the first bracket 160. The end of the surrounding wall 175 away from the bottom wall 174 is used to connect the sensor 220 to be measured. This facilitates the installation of the hollow encoder.

[0070] In one embodiment, see Figure 10The connecting shaft 110 includes a connecting shaft segment 117. The connecting shaft segment 117 connects to one end of the fourth shaft segment 116 that is opposite to the third shaft segment 115. The driving member 120 includes a handwheel 121. A mounting portion 1211 is formed at one end of the handwheel 121. The mounting portion 1211 is fixedly connected to the connecting shaft segment 117. By rotating the handwheel 121 about the second center line 111, the connecting shaft 110 can be driven to rotate, thereby realizing the detection of the encoder 200 under test.

[0071] Optionally, see Figure 10 The mounting part 1211 has a first mounting groove 12111, which is threadedly connected to the connecting shaft section 117.

[0072] In one embodiment, see Figure 12 and Figure 13 The drive unit 120 includes a motor 122 and a coupling 123. The motor 122 has an output shaft 1221. One end of the coupling 123 is connected to the output shaft 1221. The other end of the coupling 123 is connected to the connecting shaft section 117. By driving the connecting shaft 110 to rotate through the motor 122, automated and repetitive precision testing can be achieved, meeting various testing requirements.

[0073] In other embodiments, the reference encoder 300 and the motor 122 may be integrated into a single device to form an integral servo motor 122.

[0074] In one embodiment, see Figure 12 and Figure 13 The detection device 100 also includes a base plate 180 and a motor bracket 190. The base 140 and the motor bracket 190 are spaced apart from each other on the base plate 180. The motor 122 is fixedly connected to the motor bracket 190. This improves the installation stability of the motor 122.

[0075] In this embodiment, the connecting shaft 110 and the base plate 180 are spaced apart radially Y along the connecting shaft 110. In other embodiments, the axial direction X of the connecting shaft 110 is parallel to the surface of the base plate 180.

[0076] In one embodiment, see Figure 13 The coupling 123 has a second mounting groove 1231, which is threadedly connected to the connecting shaft section 117. The first mounting groove 12111 and the second mounting groove 1231 have the same structure. Thus, the detection device 100 can replace the drive component 120 with a handwheel 121 or a motor 122 according to actual needs, realizing manual or automated detection of the encoder 200 under test.

[0077] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

1. A detection device for detecting an encoder to be detected, characterized in that, The detection device includes a connecting shaft, a driving component, and multiple adapters; one end of the connecting shaft is used to connect to a reference encoder, and the other end of the connecting shaft is used to selectively and detachably connect to one of the adapters, each adapter being used to connect to a corresponding encoder under test, and the types of encoders under test connected to each adapter are different; the driving component is connected to the connecting shaft and is used to drive the connecting shaft to rotate.

2. The detection device of claim 1, wherein, The adapter includes a disassembly part and a connecting part. The disassembly part is detachably connected to the connecting shaft, and the connecting part is connected to the end of the disassembly part opposite to the connecting shaft. The connecting part is used to connect the rotor of the encoder under test.

3. The detection device of claim 2, wherein, The end face of the connecting shaft forms a connecting groove; the disassembly and assembly parts of each of the adapters have the same structure, and the end of the disassembly and assembly part opposite to the connecting part extends into the connecting groove and is threadedly connected to the connecting shaft.

4. The detection device of claim 1, wherein, Along the axial direction of the connecting shaft, the end of the adapter opposite to the connecting shaft has a first fixing surface, which is used to fix the rotor of the encoder under test to the encoder under test.

5. The detection device of claim 1, wherein, The encoder under test includes a rotor under test, the rotor under test has a fixing hole, and the outer peripheral surface of the adapter opposite to the connecting shaft has a second fixing surface, which is used to extend into the fixing hole and connect with the rotor under test of the encoder under test.

6. The detection device according to claim 1, characterized in that, The adapter has a first center line, and the connecting shaft has a second center line, the first center line and the second center line being approximately coincident.

7. The detection device according to claim 1, characterized in that, The detection device also includes a base with a mounting hole, a connecting shaft rotatably disposed in the mounting hole, an adapter located on one side of the base along the axial direction of the connecting shaft, and a driving member located on the other side of the base along the axial direction of the connecting shaft.

8. The detection device according to claim 7, characterized in that, The encoder under test includes a stator and a rotor, and the adapter is used to connect the rotor under test; the reference encoder includes a reference stator and a reference rotor, and the reference rotor is connected to the connecting shaft; the detection device further includes a first bracket and a plurality of second brackets, the first bracket is connected to one side of the base along the axial direction of the connecting shaft, and the first bracket is used to connect the reference stator; the second bracket is used to connect the stator, and the other side of the base is used to selectively connect one of the second brackets.

9. The detection device according to claim 8, characterized in that, The first bracket abuts against one end of the connecting shaft along the axial direction, and the second bracket abuts against the other end of the connecting shaft along the axial direction.

10. The detection device according to claim 7, characterized in that, The detection device also includes two bearings, which are spaced apart along the axial direction of the mounting hole. The two ends of the connecting shaft pass through the bearings respectively, and the outer circumferential surface of the connecting shaft is spaced apart from the inner circumferential surface of the mounting hole.

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