A device for determining the gasket specification of a reducer shafting

Abstract

The application discloses a device for determining gasket specifications of a speed reducer shaft system, which is used for selecting gaskets with appropriate specifications for a front casing and a rear casing of a speed reducer in the speed reducer shaft system. The device comprises a rack for positioning the front casing of the speed reducer; a gauge casing positioned on the front casing of the speed reducer and provided with a rear bearing chamber for mounting a rear bearing, the gauge casing being provided with a test hole for connecting the rear bearing chamber with the outside; a pressing mechanism arranged on the rack, the pressing mechanism comprising a pushing assembly and a pressing plate, the pressing plate extending into the rear bearing chamber through the test hole; and a range finder arranged on the gauge casing and located above the test hole; wherein the pressing plate applies a set acting force to the rear bearing mounted in the rear bearing chamber under the drive of the driving assembly, and the range finder is used for measuring the interval value between the end face of the rear bearing and the upper end face of the gauge casing. The device can select gaskets with appropriate specifications.

Description

Technical Field

[0001] This invention relates to the field of electric drive assemblies, and more particularly to a device for determining the specifications of shims in a reducer shaft system. Background Technology

[0002] In new energy vehicles, the reducer shaft system of the electric drive assembly generally includes a front reducer housing and a rear reducer housing. An input shaft, an intermediate shaft, and an output shaft are located between the front and rear reducer housings. Bearings are installed at both ends of these three shafts, and correspondingly, both the front and rear reducer housings have bearing chambers for mounting the bearings. Because these three shafts have certain tolerances during manufacturing, a certain gap will exist between the bearing at the end of the shaft and the bottom of the bearing chamber after assembly. This gap may cause the bearing to shift relative to the bearing chamber. Therefore, in practice, appropriately sized shims are inserted into the bottom of the bearing chamber during the assembly of the reducer shaft system to compensate for the gap and to apply a certain preload to the bearing. To ensure that the shim size matches the gap, it is necessary to obtain an accurate gap value and then select a shim of appropriate size.

[0003] The obvious approach is to first obtain the distance between the bottom of the bearing chamber of the front housing and the bottom of the bearing chamber of the rear housing of the reducer, and then obtain the total length of the assembled shaft and bushing. The difference between the distance and the total length is the clearance between the bearing end face and the bottom of the bearing chamber. However, in actual operation, the distance between the bottom of the bearing chamber of the front housing and the bottom of the bearing chamber of the rear housing is difficult to measure (it needs to be measured after the front and rear housings are assembled, but after assembly, it is impossible to insert a measuring instrument inside for measurement). Therefore, existing technologies use the designed dimensions between the bottom of the bearing chamber of the front housing and the bottom of the bearing chamber of the rear housing. However, tolerances exist during manufacturing, and the designed dimensions differ from the actual dimensions, not being accurate values ​​that match reality. Furthermore, after assembly, the goal is to eliminate gaps and apply a certain clamping force to the bearing using shims. However, the total length of the bearing and shaft differs depending on whether the bearing is clamped or not. In existing technology, the total length measured when the bearing is not clamped is inevitably too large, and this value is not accurate. In summary, the gap value calculated using two inaccurate values ​​contains significant errors, and shims selected based on these values ​​are highly likely to fail to achieve their intended purpose. In practice, shims selected using this gap value are often too small, leaving a gap between the bearing end face and the bottom surface of the bearing housing. Consequently, the bearing cannot obtain the required clamping force. Summary of the Invention

[0004] This invention provides a device for determining the shim specifications for a reducer shaft system, which solves the problem in the prior art that it is impossible to select shims of suitable size for the reducer shaft system.

[0005] The present invention adopts the following technical solution: a device for determining the shim specifications of a reducer shaft system, used to select shims of suitable specifications for the reducer front housing and reducer rear housing in the reducer shaft system, comprising: a frame for positioning the reducer front housing; a fixture housing positioned on the reducer front housing and having a rear bearing chamber for installing a rear bearing, the fixture housing having a test hole communicating with the outside; a clamping mechanism disposed on the frame, the clamping mechanism including a pushing assembly and a pressure plate, the pressure plate extending into the rear bearing chamber through the test hole; and a rangefinder disposed on the fixture housing and located above the test hole; wherein, the pressure plate applies a set force to the rear bearing installed in the rear bearing chamber under the drive of a driving assembly, the rangefinder is used to measure the distance between the end face of the rear bearing and the upper end face of the fixture housing, the distance value being used to determine the shim specifications.

[0006] This invention offers the following advantages: The fixture housing simulates the rear housing of the reducer shaft system for which the shim is to be selected. A test hole is provided on the fixture housing, and a pressure plate in the clamping mechanism extends into the test hole to apply a predetermined force to the rear bearing. This predetermined force simulates the preload force of the shim on the rear bearing under ideal conditions. Then, a rangefinder is used to measure the distance between the end face of the rear bearing and the upper end face of the fixture housing. Based on this distance, the required clearance value is calculated, and finally, the shim is selected according to the clearance value. Using the shim selected by the device provided by this invention for assembly, the assembled reducer shaft system can compensate for the gap between the bearing and the bottom of the bearing housing through the shim. Simultaneously, the shim can apply a certain preload force to the bearing, which is the aforementioned predetermined force.

[0007] Preferably, the frame includes a base and a fixed plate positioned on the base. The reducer front housing and the fixture housing are both positioned on the base and located between the base and the fixed plate. The clamping mechanism is disposed on the fixed plate. This arrangement ensures that the reducer front housing and the fixture housing are both located between the base and the fixed plate, and the clamping mechanism is disposed on the fixed plate, which facilitates the clamping mechanism to push against the rear bearing installed in the fixture housing.

[0008] Preferably, the pushing assembly includes a driving component and a transmission component, wherein the transmission component is disposed between the driving component and the pressure plate and transmits the driving force of the driving component to the pressure plate.

[0009] Preferably, the jacking assembly further includes a pressure sensor disposed between the driving component and the transmission component; or, the pressure sensor is disposed between the transmission component and the pressure plate; or, the transmission component includes a first pressure rod and a second pressure rod, and the pressure sensor is disposed between the first pressure rod and the second pressure rod. By providing a pressure sensor, the magnitude of the force applied by the pressure plate to the rear bearing is detected, and the data value detected by the pressure sensor facilitates the adjustment of the applied force to a set force.

[0010] Preferably, the driving component is a clamping bolt, the fixing plate has a through threaded hole, the clamping bolt is threaded into the threaded hole, and the transmission component includes a pressure rod, one end of which is mounted on the clamping bolt, and the other end of which is mounted on the pressure plate. Thus, by tightening the clamping bolt, the clamping bolt can move relative to the fixing plate, thereby driving the pressure rod to move and exert a pushing force on the pressure plate.

[0011] Preferably, the clamping bolt has an inner hole, and one end of the pressure rod is fitted or rotatably fitted inside the inner hole.

[0012] Preferably, the other end of the pressure rod is provided with a ball joint, and the pressure plate is provided with a ball seat adapted to the ball joint. The pressure rod is rotatably connected to the pressure plate through the cooperation of the ball joint and the ball seat. When assembling the reducer front housing and the fixture housing onto the frame, it is difficult to ensure absolute horizontality. Therefore, there is a high probability that there is a slight tilt between the pressure plate and the end face of the rear bearing. By providing a ball joint, the pressure plate can rotate freely relative to the pressure rod, ensuring that the pressure plate can fully fit against the end face of the rear bearing.

[0013] Preferably, the pressure rod has an annular boss, and a spring is sleeved on the pressure rod between the annular boss and the clamping bolt. One end of the spring presses against the lower end face of the clamping bolt, and the other end of the spring presses against the annular boss. The spring generates a pushing force on the clamping bolt. Under the action of this pushing force, on the one hand, the clamping bolt engages tightly with the threaded hole on the fixing plate, preventing slippage and ensuring controlled tightening; on the other hand, it improves the operator's accuracy in tightening the clamping bolt.

[0014] Preferably, the pressure plate is provided with a notch, and the rangefinder measures the distance between the end face of the bearing and the upper end face of the fixture housing through the notch.

[0015] Preferably, the notch is located at the edge of the pressure plate. This facilitates the measurement of the distance value by the rangefinder through the notch, and the notch's location at the edge ensures the overall strength of the pressure plate.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a device for determining the shim specifications of a reducer shaft system provided in an embodiment of the present invention;

[0018] Figure 2 This is an exploded view of the device in the embodiment;

[0019] Figure 3 This is an exploded view of the clamping mechanism in the embodiment;

[0020] Figure 4 This is a schematic diagram illustrating the device used in the application embodiment to calculate the gap value;

[0021] Figure 5 This is a schematic diagram of the c-values ​​in the front and rear housings of the reducer for the selected pad.

[0022] The components are as follows: 1. Frame, 10. Base, 11. Support column, 12. Fixing plate, 13. First positioning column, 14. Second positioning column, 2. Reducer front housing, 20. Front bearing chamber, 21. Front bearing, 3. Inspection fixture housing, 30. Rear bearing chamber, 31. Test hole, 4. Clamping mechanism, 40. Pushing assembly, 400. Clamping bolt, 401. First pressure rod, 402. Second pressure rod, 403. Pressure sensor, 404. Spring, 405. Ball joint, 41. Pressure plate, 410. Ball seat, 411. Notch, 5. Rangefinder, 6. Reducer rear housing, 60. Rear bearing, 7. Input shaft. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] Example: This example provides a device for determining shim specifications for a reducer shaft system. This device is used to select suitable shims for the reducer front housing and reducer rear housing in the reducer shaft system. Specifically, before a set of reducer shaft system components (mainly including the reducer front housing, reducer rear housing, input shaft, output shaft, intermediate shaft, and corresponding bearings) are manufactured and ready for assembly, the device provided in this example is used for testing to accurately calculate the clearance value between the bearing and the bottom of the bearing housing. Based on this clearance value, suitable shims can be selected for the assembly of the reducer shaft system. Figure 1 and Figure 2 As shown, the device includes a frame 1, a fixture housing 3, a clamping mechanism 4, and a rangefinder 5. The frame 1 positions the front housing of the reducer during use. The fixture housing 3 is positioned on the front housing of the reducer and has a rear bearing chamber 30 for installing the rear bearing. The fixture housing 3 also has a test hole 31 connecting the rear bearing chamber 30 to the outside. The clamping mechanism 4 is mounted on the frame 1 and includes a pushing assembly 40 and a pressure plate 41. The pressure plate 41 extends into the rear bearing chamber 30 through the test hole 31. The rangefinder 5 is mounted on the fixture housing 3 and positioned above the test hole 31. The pressure plate 41, driven by a driving assembly, applies a predetermined force to the rear bearing installed in the rear bearing chamber 30. The rangefinder 5 measures the distance between the end face of the rear bearing and the upper end face of the fixture housing 3; this distance is used to determine the shim specifications.

[0026] The aforementioned fixture housing 3 simulates the rear housing of the reducer in the reducer shaft system. When using this device, the front housing 2 of the reducer is first fixed on the frame 1. Then, the input shaft, output shaft, intermediate shaft, and corresponding bearings of the reducer shaft system to be shimmed are assembled onto the front housing 2 of the reducer. After that, the fixture housing 3 is assembled onto the front housing 2 of the reducer. A set force is applied to the rear bearing by the pressure plate 41 in the clamping mechanism 4 extending into the test hole 31. This set force can simulate the preload force of the shim on the rear bearing required under ideal conditions. Then, in this case, the distance between the end face of the rear bearing and the upper end face of the fixture housing 3 is measured using a rangefinder 5. The required clearance value is then calculated based on this distance value. Finally, the shim is selected based on the clearance value. Using the shim selected by the device provided by this invention for assembly, the shim can offset the clearance between the bearing and the bottom of the bearing housing in the assembled reducer shaft system. At the same time, the shim can apply a certain preload force to the bearing, which is the aforementioned set force.

[0027] In this embodiment, the frame 1 includes a base 10 and a fixing plate 12 positioned on the base 10. A support column 11 is fixedly installed on the base 10, and the fixing plate 12 is fixedly installed on the support column 11 to be positioned on the base 10. In addition, a positioning column is fixedly installed on the base 10, and the reducer front housing 2 is fixedly installed on the positioning column to be positioned on the base 10. The fixture housing 3 is normally assembled with the reducer front housing 2 (simulating the assembly of the reducer front housing and the reducer front housing in the reducer shaft system). In this way, both the reducer front housing 2 and the fixture housing 3 are positioned on the base 10 and located between the base 10 and the fixing plate 12. The clamping mechanism 4 is set on the fixing plate 12, which can facilitate the clamping mechanism 4 to push the rear bearing installed in the fixture housing 3. In this embodiment, the positioning pins include a first positioning pin 13 and a second positioning pin 14. The front housing 2 of the reducer is provided with an oil seal hole for the reducer output shaft and a bolt hole for assembly with the motor. The first positioning pin 13 is fixedly positioned through the oil seal hole, and the second positioning pin 14 is fixedly positioned through the bolt hole.

[0028] Combination Figure 3As shown, the jacking assembly 40 in this embodiment includes a clamping bolt 400, a pressure rod, and a pressure sensor 403. A threaded hole is provided through the fixed plate 12, and the clamping bolt 400 is threadedly connected to the fixed plate 12 through the threaded hole. By tightening the clamping bolt 400, the clamping bolt 400 can move up and down relative to the fixed plate 12. A mounting hole is formed in the clamping bolt 400, and the upper end of the pressure rod is interference-fitted into the mounting hole. The lower end of the pressure rod is connected to the pressure plate 41. Thus, when the clamping bolt 400 is tightened, the pressure rod will rotate and move up and down with the clamping screw, thereby applying a jacking force to the rear bearing through the pressure plate 41. The pressure rod in this embodiment includes a first pressure rod 401 and a second pressure rod 402. The pressure sensor 403 is disposed between the first pressure rod 401 and the second pressure rod 402. Specifically, the ends of the first pressure rod 401 and the second pressure rod 402 facing each other are formed with annular bosses, and the pressure sensor 403 is disposed between the annular bosses on both sides. The pushing force generated by tightening the clamping bolt 400 is transmitted to the rear bearing through the first pressure rod 401, pressure sensor 403, second pressure rod 402, and pressure plate 41. The reading of pressure sensor 403 represents the pushing force on the rear bearing. Guided by the reading of pressure sensor 403, the operator can adjust the pushing force on the rear bearing by tightening the clamping bolt 400 until the set force is reached. It should be noted that in other embodiments, the pressure rod can be a single piece, with the pressure sensor 403 positioned between the clamping bolt 400 and the pressure rod, or between the pressure rod and the pressure plate 41. Alternatively, the pressure rod can be designed to rotate with the clamping bolt 400. Specifically, the diameter of the mounting hole in the clamping bolt 400 can be designed to be slightly larger than the outer diameter of the pressure rod, creating a clearance fit. This way, when tightening the clamping bolt 400, the pressure rod is pushed downward through the bottom of the mounting hole without the pressure rod rotating with the clamping bolt 400.

[0029] Furthermore, in this embodiment, a spring 404 is provided between the annular boss of the first pressure rod 401 and the lower end face of the clamping bolt 400. The spring 404 is sleeved on the outside of the first pressure rod 401, with its upper end pressing against the lower end face of the clamping bolt 400 and its lower end pressing against the annular boss. When adjusting the pushing force on the rear bearing by tightening the clamping bolt 400, the spring 404 exerts a pushing force on the clamping bolt 400. Under this pushing force, the operator needs to exert considerable force to tighten the clamping bolt 400, which brings two advantages. On one hand, to precisely adjust the force exerted by the pressure plate 41 on the rear bearing to the set force, it is necessary to be able to finely tighten the clamping bolt 400. The pushing force of the spring 404 increases the resistance to tightening the clamping bolt 400, objectively allowing the operator to tighten it slowly and with a smaller turning radius. This facilitates precise adjustment of the force exerted by the pressure plate 41 on the rear bearing to the set force. On the other hand, under the action of this pushing force, the clamping bolt 400 engages tightly with the threaded hole on the fixing plate 12, preventing slippage and ensuring it remains in place after being tightened to the correct position.

[0030] It is understood that the jacking assembly 40 only needs to include a driving component and a transmission component disposed between the driving component and the pressure plate 41. That is, the purpose of the present invention can be achieved by transmitting the driving force of the driving component to the pressure plate 41 through the transmission component. Therefore, in other embodiments, a pressure sensor may not be provided, or a driving component and transmission component other than the clamping bolt and pressure rod provided in this embodiment may be used. For example, only the clamping bolt and pressure rod provided in this embodiment may be used, and the corresponding set force can be considered to be achieved by setting the number of turns through prior experiments, thereby eliminating the need to set a pressure sensor; or an automated design may be carried out, using a motor as the driving component and an electric push rod as the transmission component, and the purpose can be achieved through automated control.

[0031] like Figure 3As shown in the diagram, in this embodiment, a ball joint 405 is also provided at the other end of the second pressure rod 402, and a ball seat 410 adapted to the ball joint 405 is provided on the pressure plate 41. The second pressure rod 402 is rotatably connected to the pressure plate 41 through the cooperation of the ball joint 405 and the ball seat 410. Because it is difficult to ensure that the reducer front housing 2 and the fixture housing 3 are perfectly horizontal when assembled onto the frame 1, the pressure plate 41 is very likely to have a slight tilt with the end face of the rear bearing. By providing the ball joint 405, the pressure plate 41 can rotate freely relative to the second pressure rod 402, ensuring that the pressure plate 41 can fully fit with the end face of the rear bearing. That is, no matter what degree of tilt the reducer front housing 2 and the fixture housing 3 have relative to the frame 1, it can be ensured that the pressure plate 41 pushes the rear bearing in a direction perpendicular to the rear bearing, which can truly simulate the pre-tightening effect of the internal shims on the rear bearing after the reducer shaft system is assembled.

[0032] In addition, to facilitate the measurement by the rangefinder 5, a notch 411 is provided on the pressure plate 41 to expose the rear bearing. The rangefinder 5 then measures the distance between the end face of the rear bearing and the upper end face of the fixture housing 3 through the notch 411. Furthermore, the notch 411 is located at the edge of the pressure plate 41. This facilitates the rangefinder's measurement of the distance value and ensures the overall strength of the pressure plate. The rangefinder 5 in this embodiment operates on the principle of laser ranging, which is existing technology and will not be elaborated upon here. Of course, rangefinders 5 with other operating principles can also be used, as long as the measurement accuracy is met.

[0033] The following is combined Figure 4 and Figure 5 The use of this device and the process of pad selection calculation are explained below:

[0034] First, prepare all components of the reducer shaft system for the selected pad, including the reducer rear housing 6, reducer front housing 2, input shaft 7, output shaft, and intermediate shaft. The input shaft 7, output shaft, and intermediate shaft are each fitted with a rear bearing 60 and a front bearing 21 at both ends (in this embodiment, only...). Figure 5The diagram shows the assembly of the input shaft 7; the assembly of the output shaft and intermediate shaft with the front and rear housings of the reducer is similar. Next, the front housing 2 of the reducer is positioned onto the base 10 using positioning pins. Then, the input shaft 7, output shaft, and intermediate shaft are installed into the front housing 2, with the front bearings 21 on each of the three shafts installed into their respective front bearing chambers 20. The fixture housing 3 is then aligned and assembled onto the front housing 2 of the reducer, ensuring that the rear bearings 60 on each of the three shafts are installed into their respective rear bearing chambers 30 within the fixture housing 3 and exposed through the test holes 31. Tightening the clamping bolts 400 pushes the rear bearings 60 against the pressure rod and pressure plate 41, while simultaneously observing the value measured and displayed by the pressure sensor 403. Adjustments are made based on this value until the pressure sensor 403 displays the set force value. At this point, the distance 'a' between the end face of the rear bearing and the upper end face of the fixture housing 3 is read using the rangefinder 5. The reducer front housing 2 and the fixture housing 3 have a first mating surface. The design value of the distance between the upper end face of the fixture housing 3 and the first mating surface is b. This design value b is the design value during the manufacturing of the device and is a fixed value after being measured with a depth gauge after manufacturing. Then, the distance value L between the upper end face of the rear bearing 60 and the first mating surface is calculated using a and b, where L = ba. In the reducer shaft system of the above-mentioned candidate shims, the reducer rear housing 6 and the reducer front housing 2 have a second mating surface. The distance value c between the inner wall of the reducer rear housing 6 and the second mating surface is measured with a depth gauge (this distance value c can be measured directly on the reducer front housing using a depth gauge). Finally, the clearance value d between the end face of the rear bearing 60 and the bottom of the bearing chamber inside the reducer rear housing 6 after assembly is calculated, where d = cL. A suitable shim is selected based on the clearance value d.

[0035] Combination Figure 4 and Figure 5 As shown, the key to this shim selection calculation process is that, on the one hand, the pressure plate 41 pushes the rear bearing 60 to simulate the pre-clamping force generated by the shim on the rear bearing 60 after assembly in an ideal state (with suitable shim specifications). In this state, the total length of the shaft and the bearings at both ends is fixed, eliminating the errors mentioned in the prior art. On the other hand, in this calculation process, the values ​​a and c that need to be measured are convenient and accurate. Therefore, the clearance value d can be accurately calculated using the above device and calculation, and then a shim of suitable specifications can be selected based on the clearance value d. It is understood that there are manufacturing tolerances in the input shaft, output shaft, and intermediate shaft of each reducer shaft system. Therefore, before assembly, each reducer shaft system can have its reducer front housing, input shaft, output shaft, and intermediate shaft assembled into the device provided in this embodiment. After measurement and calculation by the device, an accurate clearance value d is obtained, and then a shim of suitable specifications can be selected.

[0036] In this invention, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific implementation.

[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for determining shim specifications for a reducer shaft system, used to select shims of suitable specifications for the reducer front housing (2) and reducer rear housing (6) in the reducer shaft system, characterized in that, include: A frame (1) is used to position the front housing (2) of the reducer. The fixture housing (3) is positioned on the front housing (2) of the reducer and has a rear bearing chamber (30) for mounting the rear bearing. The fixture housing (3) is provided with a test hole (31) that connects the rear bearing chamber (30) to the outside. A clamping mechanism (4), disposed on the frame (1), the clamping mechanism (4) includes a push assembly (40) and a pressure plate (41), the pressure plate (41) extending into the rear bearing chamber (30) through the test hole (31); and, The rangefinder (5) is mounted on the fixture housing (3) and located above the test hole (31); The pressure plate (41) applies a set force to the rear bearing installed in the rear bearing chamber (30) under the drive of the drive assembly. The distance measuring instrument (5) is used to measure the distance between the end face of the rear bearing and the upper end face of the fixture housing (3). The distance value is used to determine the shim specification. The frame (1) includes a base (10) and a fixing plate (12) positioned on the base (10). The reducer front housing (2) and the fixture housing (3) are both positioned on the base (10) and located between the base (10) and the fixing plate (12). The clamping mechanism (4) is set on the fixing plate (12). The pressure plate (41) is provided with a notch (411). The distance measuring instrument (5) measures the distance between the end face of the rear bearing and the upper end face of the fixture housing (3) through the notch (411). A positioning column is fixedly installed on the base (10). The positioning column includes a first positioning column (13) and a second positioning column (14). The front housing (2) of the reducer simulates the front housing of the reducer and is provided with an oil seal hole for the reducer output shaft and a bolt hole for assembly with the motor. The first positioning column (13) is fixedly positioned through the oil seal hole, and the second positioning column (14) is fixedly positioned through the bolt hole.

2. The device for determining the shim specifications of a reducer shaft system as described in claim 1, characterized in that, The push assembly (40) includes a drive member and a transmission member. The transmission member is disposed between the drive member and the pressure plate (41) and transmits the driving force of the drive member to the pressure plate (41).

3. The device for determining the shim specifications of a reducer shaft system as described in claim 2, characterized in that, The jacking assembly (40) also includes a pressure sensor (403), which is disposed between the driving component and the transmission component; Alternatively, the pressure sensor (403) may be disposed between the transmission component and the pressure plate (41); Alternatively, the transmission component includes a first pressure rod (401) and a second pressure rod (402), and the pressure sensor (403) is disposed between the first pressure rod (401) and the second pressure rod (402).

4. The device for determining the shim specifications of a reducer shaft system as described in claim 2 or 3, characterized in that, The driving component is a clamping bolt (400), the fixing plate (12) is provided with a through threaded hole, the clamping bolt (400) is threadedly connected in the threaded hole, the transmission component includes a pressure rod, one end of the pressure rod is provided on the clamping bolt (400), and the other end of the pressure rod is provided on the pressure plate (41).

5. The device for determining the shim specifications of a reducer shaft system as described in claim 4, characterized in that, The clamping bolt (400) has an inner hole, and one end of the pressure rod is fitted or rotated within the inner hole.

6. The device for determining shim specifications for a reducer shaft system as described in claim 4, characterized in that, The other end of the pressure rod is provided with a ball joint (405), and the pressure plate (41) is provided with a ball seat (410) that is adapted to the ball joint (405). The pressure rod is rotatably connected to the pressure plate (41) through the cooperation of the ball joint (405) and the ball seat (410).

7. The device for determining the shim specifications of a reducer shaft system as described in claim 4, characterized in that, The pressure rod has an annular boss, and a spring (404) is provided on the pressure rod between the annular boss and the clamping bolt (400). One end of the spring (404) presses against the lower end face of the clamping bolt (400), and the other end of the spring (404) presses against the annular boss.

8. The device for determining the shim specifications of a reducer shaft system as described in claim 1, characterized in that, The notch (411) is provided at the edge of the pressure plate (41).

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