Transmission parameter measuring device

Abstract

The utility model relates to a transmission parameter measuring device. The transmission parameter measuring device comprises a bearing unit and a measuring unit, the bearing unit comprises a centering assembly, the centering assembly comprises a fixing plate and a fixing seat, and the peripheral surface of the fixing seat is elastically connected to the fixing plate, so that the fixing seat has a self-centering function, the coaxial position deviation of the to-be-measured product and the fixing seat can be greatly reduced, and the measurement result can be more accurate. The measuring unit comprises a measuring assembly, the measuring assembly is provided with a connecting shaft, a first detecting element and a second detecting element, the first detecting element and the second detecting element are connected to the connecting shaft, and the first detecting element is used for measuring first transmission parameters of the transmission part when the connecting shaft drives the transmission part to rotate together. The second detection element is used for measuring a second transmission parameter of the transmission part when the connecting shaft drives the transmission part to move in the axial direction of the transmission part, the gear backlash and the axial clearance can be measured at the same time, and compared with an existing measurement mode, the automation degree is high, the measurement speed is higher, and the measurement efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of automotive electronic assembly technology, and in particular to a transmission parameter measuring device. Background Technology

[0002] The differential is a crucial component of a car chassis. It's a mechanism that allows the left and right (or front and rear) drive wheels to rotate at different speeds. The quality of the differential not only determines the safety of the vehicle but also its driving comfort. Inadequate clearance between the planetary gears and bevel gears in the differential can cause abnormal noises when cornering, affecting the driving experience and accelerating gear wear. Therefore, during differential assembly, it's necessary to measure and confirm the differential's tooth flank clearance and axial clearance to determine if the assembly is up to standard.

[0003] In the existing technology, the measurement of differential gear clearance is mostly done manually or by using a cylinder to push the differential. Both of these measurement methods have problems such as slow speed, low efficiency, low accuracy, and poor stability. On the other hand, when using existing testing equipment for measurement, the product under test often has positional deviations when placed on the bearing platform. All of these factors will lead to inaccurate measurement results. Utility Model Content

[0004] Based on this, the purpose of this application is to provide a transmission parameter measuring device to solve the problems of low measurement efficiency and inaccurate measurement results caused by positional errors of the product under test when measuring the gear clearance of the differential in the prior art.

[0005] According to one aspect of this application, a transmission parameter measuring device is provided, comprising a bearing unit and a measuring unit arranged adjacent to each other;

[0006] The bearing unit includes a centering component, which includes a fixing plate and a fixing seat for fixing the product to be tested. The outer peripheral surface of the fixing seat is elastically connected to the fixing plate.

[0007] The measuring unit includes a bracket and a measuring component mounted on the bracket. The measuring component has a connecting shaft and a first detection element and a second detection element connected to the connecting shaft. The connecting shaft is used to connect the transmission component of the product under test, and the connecting shaft can be controllably rotated about its own central axis or moved along its own axial direction. The first detection element is used to measure a first transmission parameter of the transmission component when the connecting shaft drives the transmission component to rotate together, and the second detection element is used to measure a second transmission parameter of the transmission component when the connecting shaft drives the transmission component to move along its own axial direction.

[0008] In one embodiment, the measuring components are two in number, and the two measuring components are disposed opposite each other on both sides of the centering component in a vertical direction, and the central axis of the connecting shaft extends in the vertical direction.

[0009] In one embodiment, the measuring component includes a first driving source, a mounting base, and a second driving source. The first driving source is mounted on the bracket, and the mounting base is slidably disposed on the bracket and tractively connected to the first driving source. The second driving source, the connecting shaft, the first detection element, and the second detection element are all connected to the mounting base, and the connecting shaft is tractively connected to the second driving source.

[0010] The first drive source is used to drive the mounting base, the second drive source, the connecting shaft, the first detection element, and the second detection element to move together along the axial direction of the connecting shaft; the second drive source is used to drive the connecting shaft to rotate around its own central axis.

[0011] In one embodiment, a locking element is also connected to the mounting base, and the connecting shaft passes through the locking element.

[0012] In one embodiment, the connecting shaft has a connecting end with a variable diameter for connecting the transmission component, and the mounting base is provided with a third drive source that is drively connected to the connecting end. The third drive source is used to drive the diameter of the connecting end to increase so that the connecting end can connect to the transmission component, or to drive the diameter of the connecting end to decrease so that the connecting end disengages from the transmission component.

[0013] In one embodiment, the first drive source is connected to the mounting base via a pressure sensing element, which is used to measure the driving force of the first drive source to move the mounting base, so as to determine the limit position of the movement of the mounting base.

[0014] And / or, the second drive source is connected to the connecting shaft via a torque sensing element, the torque sensing element being used to measure the torque by which the second drive source drives the connecting shaft to rotate, in order to determine the limit angle of rotation of the connecting shaft.

[0015] In one embodiment, the bearing unit further includes a lifting assembly, which includes a base plate, a first lifting cylinder and a first lifting plate. The first lifting cylinder is disposed on the base plate and is tractively connected to the first lifting plate. The first lifting plate is spaced above the base plate, and the centering assembly is disposed on the first lifting plate.

[0016] In one embodiment, the lifting assembly further includes a second lifting cylinder and a second lifting plate. The second lifting cylinder is disposed on the base plate and is tractively connected to the second lifting plate. The second lifting plate is spaced above the first lifting plate, and the fixing seat passes through the second lifting plate.

[0017] In one embodiment, the centering component further includes a floating positioning pin disposed on the fixed plate and passing through the second lifting plate. The end of the floating positioning pin away from the fixed plate has a positioning part, which can generate a resettable displacement in the vertical direction under the action of external force.

[0018] In one embodiment, the centering component further includes a first adjusting plate and a second adjusting plate disposed on the first adjusting plate. The first adjusting plate is disposed on the first lifting plate, and the fixing plate is disposed on the second adjusting plate. One of the first adjusting plate and the second adjusting plate is used to adjust the position of the centering component in a first horizontal direction, and the other is used to adjust the position of the centering component in a second horizontal direction perpendicular to the first horizontal direction.

[0019] The aforementioned transmission parameter measuring device, on the one hand, by setting a connecting shaft for connecting the transmission component (e.g., gear train) in the measuring assembly, and a first detection element and a second detection element connected to the connecting shaft, allows the first detection element to measure the first transmission parameter (e.g., tooth backlash) of the transmission component when the connecting shaft drives the transmission component to rotate around its own central axis, and the second detection element to measure the second transmission parameter (e.g., axial clearance) of the transmission component when the connecting shaft drives the transmission component to move along its own axial direction. This enables a dual-purpose device that can simultaneously measure tooth backlash and axial clearance. Compared with existing measurement methods, it has a higher degree of automation, faster measurement speed, and higher measurement efficiency. On the other hand, by elastically connecting the outer circumferential surface of the fixed seat in the centering assembly to the fixed plate, the fixed seat has a self-centering function, which can greatly reduce the coaxial position deviation between the product under test and the fixed seat. Therefore, when measuring the transmission parameters of the transmission component in the product under test, it can greatly improve the measurement accuracy and make the measurement results more accurate. Attached Figure Description

[0020] Figure 1 A shaft side view of a transmission parameter measuring device provided in an embodiment of this application.

[0021] Figure 2 An axonometric view of an upper detection component provided in an embodiment of this application.

[0022] Figure 3 This is an axonometric view of a lower detection component provided in an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of a product under test placed on a conveyor line, according to an embodiment of this application.

[0024] Figure 5 This is a schematic diagram showing the connection between the connecting shaft and the third drive source in an upper detection component provided in an embodiment of this application.

[0025] Figure 6 for Figure 5 Sectional view along the AA direction.

[0026] Figure 7 for Figure 6 Enlarged schematic diagram of region B in the middle.

[0027] Figure 8 This is an axonometric view of a load-bearing unit provided in an embodiment of this application.

[0028] Figure 9 This is an isometric view of a load-bearing unit lifting the product under test, provided in an embodiment of this application.

[0029] Figure 10 This is an axonometric view of the product under test provided by a support unit in an embodiment of this application, without lifting the product.

[0030] Figure 11 This is an axonometric view of a portion of the structure in a load-bearing unit provided in an embodiment of this application.

[0031] Figure 12 This is an axonometric view of the centering component in a support unit provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Transmission parameter measuring device; 100. Conveyor line; 101. Measuring station; 200. Bearing unit; 210. Lifting assembly; 211. Base plate; 212. First lifting cylinder; 213. First lifting plate; 214. Second lifting cylinder; 215. Second lifting plate; 216. Guide shaft; 217. Pallet positioning pin; 220. Centering assembly; 221. Fixing plate; 222. Fixing seat; 223. Self-aligning bearing; 224. Floating positioning pin; 2241. Fixing part; 2242. Positioning part; 225. First adjusting plate; 226. Second adjusting plate; 300. Measuring unit; 3 10. Bracket; 320. Measuring assembly; 320a. Upper measuring assembly; 320b. Lower measuring assembly; 321. Connecting shaft; 321a. Connecting end; 321b. Shaft body; 321c. Connecting part; 321d. Inclined surface; 322. First detection element; 323. Second detection element; 324. First drive source; 325. Mounting base; 326. Second drive source; 327. Synchronous pulley; 328. Coupling; 329. Locking element; 3210. Third drive source; 3211. Pressure sensing element; 3212. Torque sensing element; 40. Product to be tested; 50. Tray. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] This application provides a transmission parameter measuring device, which is used to measure the transmission parameters of the transmission components in the product under test in order to determine whether the product is assembled correctly, and to prevent abnormal product operation due to unqualified transmission parameters after leaving the factory, which would affect the user's experience.

[0041] The following description uses a differential in an automobile as an example of the product under test, and the tooth backlash and axial clearance of the gear train in the differential as examples of the transmission parameters to be measured, to illustrate the structure of the transmission parameter measuring device in this application. It is understood that in other embodiments, the transmission parameter measuring device of this application is not limited to measuring only the tooth backlash and axial clearance of the gear train in an automobile differential; it can also measure any product under test that requires measurement of transmission parameters, and this is not limited here.

[0042] See Figure 1 , Figure 1 This diagram shows an isometric view of a transmission parameter measuring device 10 according to an embodiment of this application. The transmission parameter measuring device 10 includes a conveyor line 100, a carrier unit 200, and a measuring unit 300. The carrier unit 200 and the measuring unit 300 are arranged adjacent to each other on a measuring station 101. The conveyor line 100 extends horizontally and passes through the measuring station 101. The conveyor line 100 is used to transport the product 40 to be tested through the measuring station 101. The carrier unit 200 is used to carry the product 40 to be tested at the measuring station 101. The measuring unit 300 is used to measure the transmission parameters of the transmission components in the product 40 to be tested.

[0043] In one embodiment, such as Figure 1 As shown, the measuring unit 300 includes a bracket 310 and a measuring assembly 320 mounted on the bracket 310, such as... Figure 2 and Figure 3 As shown, the measuring assembly 320 has a connecting shaft 321 and a first detection element 322 and a second detection element 323 connected to the connecting shaft 321. The connecting shaft 321 is used to connect to the transmission component in the product under test 40, and the connecting shaft 321 can be controllably rotated about its own center or moved along its own axis. The first detection element 322 is used to measure the first transmission parameter of the transmission component when the connecting shaft 321 drives the transmission component to rotate together. The second detection element 323 is used to measure the transmission parameter of the transmission component when the connecting shaft 321 drives the transmission component to move along its own axis.

[0044] See Figure 4 , Figure 4A schematic diagram of a test product 40 in one embodiment is shown. In this embodiment, the test product 40 is an automotive differential (hereinafter referred to as the differential). The transmission component inside the differential is a gear train. The first transmission parameter is the tooth flank clearance of the gear train, and the second transmission parameter is the axial clearance of the gear train. The first detection element 322 can be a rotary encoder, and the second detection element 323 can be a displacement sensor. The rotary encoder can measure the tooth flank clearance of the gear train when the connecting shaft 321 drives the gear train to rotate together. The displacement sensor can measure the axial clearance of the gear train when the connecting shaft 321 drives the gear train to move along its own axial direction. It should be noted that the following description uses the first transmission parameter being the tooth flank clearance of the gear train in the differential and the second transmission parameter being the axial clearance of the gear train in the differential as an example.

[0045] Specifically, in combination Figures 1 to 3 As shown in the embodiment, there are two measuring components 320. These two measuring components 320 are vertically positioned opposite each other on either side of the centering component 220, namely the upper measuring component 320a and the lower measuring component 320b, such that the central axis of the connecting shaft 321 extends vertically. This is because, in one embodiment, the differential has two sets of gear trains arranged vertically, namely the upper gear train and the lower gear train. Therefore, correspondingly, there are two measuring components 320. The connecting shaft 321 of the upper measuring component 320a is used to connect to the upper gear train of the differential, so that the upper measuring component 320a can measure the tooth backlash and axial clearance of the upper gear train. The connecting shaft 321 of the lower measuring component 320b is used to connect to the lower gear train of the differential, so that the lower measuring component 320b can measure the tooth backlash and axial clearance of the lower gear train.

[0046] It is understood that in other embodiments, if the product under test 40 has only one transmission component, then it is only necessary to install a measuring component 320 on the bracket 310, which is not limited here.

[0047] See Figure 2 and Figure 3 , Figure 2 and Figure 3 Schematic diagrams of the upper measuring component 320a and the lower measuring component 320b in one embodiment are shown respectively. The structure of the upper measuring component 320a is basically the same as that of the lower measuring component 320b, for example... Figure 2In the illustrated embodiment, the upper measuring component 320a includes a first driving source 324, a mounting base 325, and a second driving source 326. The first driving source 324 is mounted on a bracket 310, and the mounting base 325 is slidably disposed on the bracket 310 and driveably connected to the first driving source 324. The second driving source 326, the connecting shaft 321, the first detection element 322, and the second detection element 323 are all connected to the mounting base 325, and the drive shaft is driveably connected to the second driving source 326. Exemplarily, the first driving source 324 can be a cylinder or an electric cylinder, etc., which drives the mounting base 325, the second driving source 326, the connecting shaft 321, the first detection element 322, and the second detection element 323 together along the axial direction of the connecting shaft 321 (i.e.,...). Figure 2 The connecting shaft 321 moves (in the vertical direction shown) so that it can connect to the gear train of the differential and drive the gear train to move together along the axial direction of the connecting shaft 321. The second drive source 326 can be a servo motor or the like, which is used to drive the connecting shaft 321 to rotate about its own central axis.

[0048] In specific implementation methods, such as Figure 2 As shown, the second drive source 326 is connected to the connecting shaft 321 via transmission components such as the synchronous pulley 327 and the coupling 328. For details, please refer to the prior art, which will not be elaborated here. It is understood that the second drive source 326 can also be connected to the connecting shaft 321 via other transmission methods such as gear transmission and chain transmission, which will not be limited here.

[0049] Figure 2 In the embodiment shown, the first detection element 322 is connected to the connecting shaft 321 and can move together with the connecting shaft 321 under the drive of the first drive source 324. The second detection element 323 is coaxially connected to the connecting shaft 321. Therefore, during measurement, the first drive source 324 can drive the connecting shaft 321, the gear train and the first detection element 322 to move together, so that the first detection element 322 can measure the axial clearance of the gear train. The second drive source 326 can drive the connecting shaft 321 and the gear train to rotate together, so that the second detection element 323 can measure the tooth flank clearance of the gear train.

[0050] It is worth noting that, due to the inherent characteristics of the differential, when measuring the tooth flank clearance of the upper and lower gear trains, the tooth flanks can only be measured sequentially. When measuring the tooth flank clearance of the upper gear train, the rotation of the lower gear train must be prevented, and vice versa. Therefore, in one embodiment, a locking element 329 is installed on the mounting base 325, and the connecting shaft 321 passes through the locking element 329. When it is necessary to prevent the gear train from rotating, simply engaging the locking element 329 with the connecting shaft 321 will prevent the connecting shaft 321 from rotating, thereby achieving the purpose of preventing the gear train from rotating. In the figure, the first detection element 322 is connected to the locking element 329. Of course, the first detection element 322 can also be installed at any position on the mounting base 325, as long as it can move together with the connecting shaft 321.

[0051] Regarding the connection method between the connecting shaft 321 and the gear train, the connecting shaft 321 is coaxially connected to the gear train via a shrink-fit connection. Specifically, as follows... Figure 3 , Figures 5 to 7 As shown, the connecting shaft 321 has a connecting end 321a with a variable diameter for connecting the gear train. The mounting base 325 is provided with a third drive source 3210 that is drively connected to the connecting end 321a. The third drive source 3210 is used to drive the diameter of the connecting end 321a to increase so that the connecting end 321a can connect to the inner circumferential surface of the sun gear in the gear train, or to drive the diameter of the connecting end 321a to decrease so that the connecting end is disengaged from the transmission component.

[0052] More specifically, the connecting end 321a includes a shaft 321b and a plurality of connecting portions 321c disposed around the shaft 321b. Optionally, each connecting portion 321c is slidably connected to the shaft 321b via an inclined surface 321d, and all connecting portions 321c are connected to a third driving source 3210. When the third driving source 3210 drives the connecting portions 321c to move, all connecting portions 321c can move simultaneously along the inclined surface 321d, thereby increasing or decreasing the diameter of the connecting end 321a. Alternatively, in another optional embodiment, the connecting portions 321c are retractably connected to the shaft 321b, so that under the drive of the third driving source 3210, all connecting portions 321c can extend or retract, thereby also increasing or decreasing the diameter of the connecting end 321a.

[0053] Additionally, it is worth noting that when measuring tooth flank clearance, the connecting shaft 321 must rotate the gear train to a limit angle. During this process, the first detection element 322 performs a measurement. Then, the connecting shaft 321 drives the gear train in reverse, and the first detection element 322 performs another measurement. The tooth flank clearance is calculated based on the two measurements. Similarly, when measuring axial clearance, the connecting shaft 321 must move the gear train to a limit position. During this process, the second detection element 323 performs a measurement. Then, the connecting shaft 321 drives the gear train in reverse, and the second detection element 323 performs another measurement. The axial clearance is calculated based on the two measurements.

[0054] Therefore, to determine whether the connecting shaft 321 drives the gear system to rotate to its limit angle or whether the connecting shaft 321 drives the gear system to move to its limit position, as shown in the figure, the first drive source 324 is connected to the mounting base 325 through a pressure sensing element 3211, and the second drive source 326 is connected to the connecting shaft 321 through a torque sensing element 3212. The pressure sensing element 3211 is used to measure the driving force of the first drive source 324 driving the mounting base 325 to move, so as to determine whether the mounting base 325 drives the connecting shaft 321 to move to its limit position based on the magnitude of the driving force; while the torque sensing element 3212 is used to measure the torque of the second drive source 326 driving the connecting shaft 321 to rotate, so as to determine whether the connecting shaft 321 has rotated to its limit angle based on the magnitude of the torque.

[0055] In the embodiment shown in the figure, it can be seen that the connecting shaft 321, locking element 329, third drive source 3210, first detection element 322, and coupling 328 are all coaxially connected to the mounting base 325, thus saving space. Of course, the arrangement of the above parts is not limited to this arrangement structure.

[0056] See Figure 3 , Figure 3 The structure of the lower measuring component 320b is shown. It can be seen that the structure of the lower measuring component 320b is basically the same as that of the upper measuring component 320a, so it will not be described in detail here.

[0057] Regarding the structure of the supporting unit 200, see [reference] Figure 8 The carrying unit 200 includes a lifting component 210 and a centering component 220 disposed on the lifting component 210. The lifting component 210 is used to lift the product under test 40 to a certain height when it is conveyed along the conveyor line 100 to the measuring station 101, so that the product under test 40 stops moving forward. The centering component 220 is used to position the product under test 40 to eliminate the coaxial deviation of the product under test 40.

[0058] Specifically, such as Figure 8As shown, the lifting assembly 210 includes a base plate 211, a first lifting cylinder 212, and a first lifting plate 213. The first lifting cylinder 212 is mounted on the base plate 211 and is connected to the first lifting plate 213. The first lifting plate 213 is spaced above the base plate 211. A centering assembly 220 is mounted on the first lifting plate 213. The first lifting cylinder 212 can drive the first lifting plate 213 and the centering assembly 220 to rise and fall together, so that the centering assembly 220 can position the product 40 to be tested after passing through the measurement station 101. Preferably, the first lifting cylinder 212 has a self-locking function, so that the first lifting cylinder 212 can lock its position when driving the first lifting plate 213 and the centering assembly 220 to a certain height, preventing the centering assembly 220 from changing its height after positioning the product 40 to be tested.

[0059] See Figure 4 and Figure 9 In some cases, the product to be tested 40 is placed on a tray 50, which is conveyed by the conveyor line 100 to the measurement station 101. To prevent the tray 50 from moving initially for rough positioning, as an improvement to the above embodiment, such as... Figure 9 and Figure 10 As shown, the lifting assembly 210 also includes a second lifting cylinder 214 and a second lifting plate 215. The second lifting cylinder 214 is mounted on the base plate 211 and is drively connected to the second lifting plate 215. The second lifting plate 215 is spaced above the first lifting plate 213, and the centering assembly 220 passes through the second lifting plate 215. Optionally, as shown... Figure 11 As shown, the second lifting plate 215 is also provided with a number of spaced pallet positioning pins 217.

[0060] Thus, when the pallet 50 carrying the product to be tested 40 arrives at the measurement station 101, the second lifting cylinder 214 can drive the second lifting plate 215 to rise vertically, thereby lifting the pallet 50 carrying the product to be tested 40. The pallet 50 is initially positioned using the pallet positioning pin 217 on the second lifting plate 215. Then, the first lifting cylinder 212 drives the first lifting plate 213 and the centering component 220 to rise vertically together, lifting the product to be tested 40 separately from the pallet 50 for precise positioning of the product to be tested 40.

[0061] Preferably, the first lifting plate 213 and the second lifting plate 215 are respectively connected to multiple guide shafts 216 that are movably inserted through the base plate 211, so as to ensure that the first lifting plate 213 and the second lifting plate 215 can only move and rise in the vertical direction without deflection.

[0062] Regarding the structure of the centering component 220, such as Figure 12As shown, in one embodiment, the centering assembly 220 includes a fixing plate 221 and a fixing seat 222 for fixing the product under test 40. The outer peripheral surface of the fixing seat 222 is elastically connected to the fixing plate 221. Specifically, a self-aligning bearing 223 is installed inside the fixing plate 221. The outer peripheral surface of the self-aligning bearing 223 is connected to the fixing plate 221 through multiple elastic elements, and the self-aligning bearing 223 is sleeved on the fixing seat 222, thereby making the outer peripheral surface of the fixing seat 222 elastically connected to the fixing plate 221. With the above arrangement, before the product under test 40 is installed on the fixing seat 222, if there is a coaxial deviation between the product under test 40 and the fixing seat 222, the self-aligning bearing 223 drives the fixing seat 222 to adaptively adjust, so that the product under test 40 is coaxially sleeved on the fixing seat 222.

[0063] Furthermore, in order to assist the product under test 40 in coaxial positioning with the fixed base 222, the centering assembly 220 also includes a floating positioning pin 224 disposed on the fixed plate 221 and passing through the second lifting plate 215. The floating positioning pin 224 includes a fixing part 2241 and a positioning part 2242. One end of the fixing part 2241 is connected to the fixed plate 221, and the positioning part 2242 is elastically connected to the end of the fixing part 2241 away from the fixed plate 221. The positioning part 2242 can generate a resettable displacement in the vertical direction under the action of external force, so that when the fixed base 222 is connected to the product under test 40, the coaxial deviation between the product under test 40 and the fixed base 222 can be adjusted, which is more conducive to assisting the product under test 40 to be coaxially fitted onto the fixed base 222.

[0064] Furthermore, to pre-position the fixed base 222 in the horizontal direction, the centering assembly 220 also includes a first adjusting plate 225 and a second adjusting plate 226 disposed on the first adjusting plate 225. The first adjusting plate 225 is disposed on the first lifting plate 213, and the fixing plate 221 is disposed on the second adjusting plate 226, so that the first adjusting plate 225, the second adjusting plate 226, and the fixing plate 221 are stacked from bottom to top in the vertical direction. The horizontal direction includes a first horizontal direction and a second horizontal direction that are perpendicular to each other, i.e. Figure 9 In the embodiment shown in the figure, the X and Y directions are indicated by a first adjusting plate 225 for adjusting the position of the centering component 220 in the first horizontal direction, and a second adjusting plate 226 for adjusting the position of the centering component 220 in the second horizontal direction. Alternatively, the first adjusting plate 225 could be used to adjust the position of the centering component 220 in the second horizontal direction, and the second adjusting plate 226 could be used to adjust the position of the centering component 220 in the first horizontal direction; this is not a limitation.

[0065] Thus, by setting the first adjustment plate 225 and the second adjustment plate 226, the position of the centering component 220 in the horizontal direction can be adjusted using the first adjustment plate 225 and the second adjustment plate 226 before the product to be tested 40 is conveyed by the conveyor line 100, making it easier to position the fixed seat 222 and the product to be tested 40 coaxially.

[0066] The following section will take the measurement of tooth backlash and axial clearance in the gear train of the differential using the transmission parameter measuring device 10 provided in this application as an example to introduce the operation process of the transmission parameter measuring device 10.

[0067] In the first step, the pallet 50 carrying the product to be tested 40 (i.e., the differential) is transported to the measurement station 101 by the conveyor line 100. The second lifting cylinder 214 of the lifting assembly 210 drives the second lifting plate 215 to lift the pallet 50 to a certain height, and the pallet 50 is positioned by the pallet positioning pin 217.

[0068] In the second step, the first lifting cylinder 212 drives the first lifting plate 213 and the centering component 220 to lift the differential separately, so that it is separated from the tray 50. After reaching a certain height, the first lifting cylinder 212 self-locks and positions the differential through the fixed seat 222 and the floating positioning pin 224.

[0069] Third, the first drive source 324 of the upper detection component drives the connecting shaft 321 to descend, and the first drive source 324 of the lower detection component drives the connecting shaft 321 to rise. The two connecting shafts 321 are respectively tightened and connected to the gear system in the differential.

[0070] In the fourth step, the locking element 329 of the upper detection component locks the connecting shaft 321 of the upper detection component, and the second drive source 326 of the lower detection component drives the connecting shaft 321 of the lower detection component to rotate together with the lower gear train of the differential. The second detection element 323 of the lower detection component measures the tooth backlash of the lower gear train.

[0071] In the fifth step, the locking element 329 of the upper detection component unlocks the connecting shaft 321 of the upper detection component, while the locking element 329 of the lower detection component locks the connecting shaft 321 of the lower detection component. The second drive source 326 of the upper detection component drives the connecting shaft 321 of the upper detection component to rotate together with the upper gear train of the differential. The second detection element 323 of the upper detection component measures the tooth backlash of the upper gear train.

[0072] In the sixth step, the locking element 329 of the lower detection component unlocks the connecting shaft 321 of the lower detection component, and the first drive source 324 of the upper detection component drives the connecting shaft 321 of the upper detection component to descend together with the upper gear train. At the same time, the first drive source 324 of the lower detection component drives the connecting shaft 321 of the lower detection component to rise together with the lower gear train. The first detection element 322 of the upper detection component and the first detection element 322 of the lower detection component measure the axial clearance of the upper gear train and the lower gear train respectively.

[0073] Step 7: Measurement ends. The first drive source 324 of the upper detection component and the first drive source 324 of the lower detection component drive the connecting shaft 321 to reset. The first lifting cylinder 212 of the lifting component 210 drives the first lifting plate 213 and the centering component 220 to reset. The second lifting cylinder 214 drives the second lifting plate 215 to reset.

[0074] In the eighth step, the conveyor line 100 transports the pallet 50 carrying the differential to the next station, and the subsequent measurement process is repeated.

[0075] It should be noted that the transmission parameter measuring device 10 in the above embodiment may also be without a conveyor line 100, and the product to be tested 40 may be placed at the measuring station 101 by a person or other tools, which is not limited here.

[0076] Therefore, the transmission parameter measuring device 10 provided in this application can achieve dual functions, simultaneously measuring the tooth flank clearance and axial clearance of the differential. Compared with existing measurement methods, it has a high degree of automation, faster measurement speed, and higher measurement efficiency. Furthermore, by elastically connecting the outer peripheral surface of the fixed seat 222 in the centering assembly 220 to the fixed plate 221, the fixed seat 222 has a self-centering function, which can greatly reduce the coaxial position deviation between the product under test 40 and the fixed seat 222. Therefore, when measuring the transmission parameters of the transmission components in the product under test 40, it can greatly improve the measurement accuracy and make the measurement results more accurate.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A drive parameter measuring device, characterized in that The bearing unit (200) and the measuring unit (300) are arranged adjacently. The bearing unit (200) comprises a centering assembly (220) and a fixing seat (222) for fixing a product (40) to be measured, wherein an outer circumferential surface of the fixing seat (222) is elastically connected to a fixing plate (221). The measuring unit (300) comprises a support (310) and a measuring assembly (320) mounted on the support (310), wherein the measuring assembly (320) comprises a connecting shaft (321), a first detection element (322) and a second detection element (323) connected to the connecting shaft (321), the connecting shaft (321) is used for connecting a transmission part of the product (40) to be measured, and the connecting shaft (321) can be controlled to rotate around a central axis thereof or move along an axis thereof; the first detection element (322) is used for measuring a first transmission parameter of the transmission part when the connecting shaft (321) drives the transmission part to rotate, and the second detection element (323) is used for measuring a second transmission parameter of the transmission part when the connecting shaft (321) drives the transmission part to move along the axis thereof.

2. The transmission parameter measuring device according to claim 1, characterized in that The measuring assembly (320) comprises two measuring assemblies (320) arranged on two sides of the centering assembly (220) in a vertical direction, and the central axis of the connecting shaft (321) extends along the vertical direction.

3. A transmission parameter measuring device according to claim 1 or 2, characterised in that The measuring assembly (320) comprises a first driving source (324), a mounting seat (325) and a second driving source (326), the first driving source (324) is mounted on the support (310), the mounting seat (325) is slidingly arranged on the support (310) and is drivingly connected to the first driving source (324); the second driving source (326), the connecting shaft (321), the first detection element (322) and the second detection element (323) are connected to the mounting seat (325), and the connecting shaft (321) is drivingly connected to the second driving source (326). The first driving source (324) is used for driving the mounting seat (325), the second driving source (326), the connecting shaft (321), the first detection element (322) and the second detection element (323) to move along the axis of the connecting shaft (321); and the second driving source (326) is used for driving the connecting shaft (321) to rotate around the central axis thereof.

4. The transmission parameter measuring device according to claim 3, characterized in that The mounting seat (325) is further connected to a locking element (329), and the connecting shaft (321) penetrates the locking element (329).

5. The transmission parameter measuring device according to claim 3, characterized in that The connecting shaft (321) has a connecting end (321a) for connecting the transmission component and with variable diameter, the mounting base (325) is provided with a third driving source (3210) which is in transmission connection with the connecting end (321a), the third driving source (3210) is used for driving the diameter of the connecting end (321a) to increase so that the connecting end (321a) can connect the transmission component, or driving the diameter of the connecting end (321a) to decrease so that the connecting end (321a) is separated from the transmission component.

6. The transmission parameter measuring device according to claim 3, characterized in that The first driving source (324) is connected to the mounting base (325) through a pressure sensing element (3211), the pressure sensing element (3211) is used for measuring the driving force of the first driving source (324) for driving the mounting base (325) to move, so as to judge the limit position of the mounting base (325) to move; And / or, the second driving source (326) is connected to the connecting shaft (321) through a torque sensing element (3212), the torque sensing element (3212) is used for measuring the torque of the second driving source (326) for driving the connecting shaft (321) to rotate, so as to judge the limit angle of the connecting shaft (321) to rotate.

7. The transmission parameter measuring device of claim 1, wherein The bearing unit (200) further comprises a jacking assembly (210), the jacking assembly (210) comprises a bottom plate (211), a first jacking cylinder (212) and a first jacking plate (213), the first jacking cylinder (212) is arranged on the bottom plate (211) and is in transmission connection with the first jacking plate (213), the first jacking plate (213) is arranged above the bottom plate (211) in a spaced manner, and the centering assembly (220) is arranged on the first jacking plate (213).

8. The transmission parameter measuring device according to claim 7, characterized in that The jacking assembly (210) further comprises a second jacking cylinder (214) and a second jacking plate (215), the second jacking cylinder (214) is arranged on the bottom plate (211) and is in transmission connection with the second jacking plate (215), the second jacking plate (215) is arranged above the first jacking plate (213) in a spaced manner, and the fixing base (222) penetrates through the second jacking plate (215).

9. The transmission parameter measuring device according to claim 8, characterized in that The centering assembly (220) further comprises a floating positioning pin (224) which is arranged on the fixing plate (221) and penetrates through the second jacking plate (215), one end of the floating positioning pin (224) away from the fixing plate (221) has a positioning portion (2242), and the positioning portion (2242) can produce a resettable displacement in a vertical direction under the action of an external force.

10. The transmission parameter measuring device of claim 7, wherein The centering assembly (220) further comprises a first adjusting plate (225) and a second adjusting plate (226) disposed above the first adjusting plate (225), the first adjusting plate (225) is disposed above the first jacking plate (213), the fixing plate (221) is disposed above the second adjusting plate (226), one of the first adjusting plate (225) and the second adjusting plate (226) is used for adjusting the position of the centering assembly (220) in a first horizontal direction, and the other is used for adjusting the position of the centering assembly (220) in a second horizontal direction perpendicular to the first horizontal direction.

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