A device for detecting the coaxiality of splined shafts / splined sleeves in a motor / reducer assembly.

Abstract

This invention relates to a device for detecting the coaxiality of a splined shaft / spline sleeve in a motor / reducer assembly. The device includes a positioning ring gauge mounted on a positioning stop and a test ring gauge fitted onto the splined shaft. The positioning ring gauge is rotatable relative to the positioning stop along the circumferential direction of the splined shaft. A dial indicator is fixed to the positioning ring gauge, and a dial indicator is mounted on the dial indicator to measure the outer or inner circumferential surface of the test ring gauge. The inner circumferential surface of the test ring gauge has an internal spline for mating with the external spline of the splined shaft. Alternatively, the splined shaft coaxiality detection device includes a measuring bar for mating between the inner circumferential surface of the test ring gauge and two adjacent spline teeth of the splined shaft. By setting the test ring gauge, the coaxiality of the external spline teeth relative to the positioning stop is determined by measuring the outer circumferential surface of the test ring gauge with the dial indicator on the positioning ring gauge. The measurement value is relatively accurate, allowing for accurate determination and selection of products with qualified coaxiality.

Description

Technical Field

[0001] This invention relates to a device for detecting the coaxiality of spline shafts / spline sleeves in a motor / reducer assembly. Background Technology

[0002] In current electric vehicles, the motor is generally connected to the reducer through a spline structure to transmit power. The spline structure includes a spline shaft and a spline sleeve. The spline shaft is installed on one of the motor and the reducer, and the spline sleeve is installed on the other of the motor and the reducer.

[0003] With the trend towards higher speeds and smaller sizes in drive motors, the problems of noise and spline wear during power transmission via spline structures are becoming increasingly prominent. The main reason for these problems is that after the motor and reducer are assembled, there is a significant misalignment between the centers of the spline sleeve and the spline shaft. This causes the spline structure to experience a large bending moment while transmitting torque, generating significant alternating bending stress, resulting in increased noise and accelerated spline wear. Since the spline shaft and spline sleeve transmit power through contact between the spline teeth, the key to solving these problems is to control the coaxiality of the spline teeth of the motor and reducer relative to the locating stop.

[0004] Because the spline teeth of a motor or reducer have involute tooth surfaces, the coaxiality of the spline tooth flank and the locating stop cannot be directly measured using a coordinate measuring machine. In existing technology, taking the spline shaft of a reducer as an example, for instance... Figure 1 As shown, the coaxiality of the outer circle 13 or spline tooth tip 14 of the spline shaft 15 on the reducer 11 relative to the locating stop 12 is generally measured using a coordinate measuring machine (CMM). However, the coaxiality of the outer circle or spline tooth tip relative to the spline tooth side is actually uncontrollable and unknown, so the measurement results cannot accurately reflect the coaxiality of the spline tooth side relative to the locating stop. Moreover, CMM measurement is too inefficient and not conducive to batch measurement. Summary of the Invention

[0005] The purpose of this invention is to provide a device for detecting the coaxiality of spline shafts / spline sleeves in motor / reducer assemblies, so as to solve the technical problem that the coaxiality of spline tooth sides and positioning stops cannot be directly measured in the prior art.

[0006] To achieve the above objectives, the technical solution for the spline shaft coaxiality detection device of the motor / reducer assembly of the present invention is as follows:

[0007] The spline shaft coaxiality testing device for the motor / reducer assembly includes a positioning ring gauge for positioning and mounting on a positioning stop, and a test ring gauge for fitting onto the spline shaft. The positioning ring gauge can rotate relative to the positioning stop in the circumferential direction of the spline shaft. A dial indicator is fixed on the positioning ring gauge, and a dial indicator for measuring the outer or inner circumferential surface of the test ring gauge is mounted on the dial indicator. The inner circumferential surface of the test ring gauge is provided with an internal spline for adapting to the external spline of the spline shaft. Alternatively, the spline shaft coaxiality testing device includes a measuring bar for adapting to the inner circumferential surface of the test ring gauge and two adjacent spline teeth of the spline shaft.

[0008] The beneficial effects are as follows: The spline coaxiality detection device of the present invention, by setting a test ring gauge, allows the coaxiality of the outer spline tooth side relative to the positioning stop to be determined by measuring the outer circumferential surface of the test ring gauge with a dial indicator on the positioning ring gauge. The measurement value is relatively accurate, which can accurately determine and select products with qualified coaxiality, thus ensuring the quality of the electric drive assembly. Moreover, the measurement method is relatively simple, which improves the measurement efficiency, reduces the detection cost, and is conducive to batch measurement.

[0009] As a further improvement, the inner circumferential surface of the external spline corresponding to the ring gauge to be tested is a conical surface, or the tooth groove of the internal spline gradually decreases or increases along the axial direction of the positioning ring gauge.

[0010] The advantage of this design is that only one type of test ring gauge and measuring rod needs to be set.

[0011] As a further improvement, the gauge holder is detachably fixed to the positioning ring gauge.

[0012] The beneficial effect is that after the measurement is completed, the gauge holder can be removed from the positioning ring gauge to facilitate the storage of the various parts of the testing device.

[0013] As a further improvement, the gauge holder is magnetically attached to the positioning ring gauge.

[0014] The advantage is that this design makes it easy to assemble and disassemble the watch holder.

[0015] As a further improvement, the positioning ring gauge has two handles evenly and at intervals.

[0016] The beneficial effect is that this design helps to apply force evenly to drive the positioning ring gauge to rotate, reducing measurement errors caused by uneven force during rotation.

[0017] To achieve the above objectives, the technical solution for the spline sleeve coaxiality detection device of the motor / reducer assembly of the present invention is as follows:

[0018] The spline sleeve coaxiality testing device for the motor / reducer assembly includes a positioning ring gauge for positioning and mounting on a positioning stop, and a plug gauge to be tested for insertion into the spline sleeve. The positioning ring gauge can rotate relative to the positioning stop in the circumferential direction of the spline sleeve. A dial indicator is fixed on the positioning ring gauge, and a dial indicator for measuring the outer circumferential surface of the plug gauge to be tested is mounted on the dial indicator. The outer circumferential surface of the plug gauge to be tested is provided with an external spline for matching the internal spline of the spline sleeve. Alternatively, the spline sleeve coaxiality testing device may also include a measuring bar for matching between two adjacent spline teeth of the spline sleeve and the outer circumferential surface of the plug gauge to be tested.

[0019] The beneficial effects are as follows: The spline coaxiality detection device of the present invention sets up a plug gauge to be tested, so that the coaxiality of the inner spline tooth side relative to the positioning stop is known by measuring the outer circumferential surface of the plug gauge by a dial indicator on the positioning ring gauge. The measurement value is relatively accurate, which can accurately determine and select products with qualified coaxiality, and ensure the quality of the electric drive assembly. Moreover, the measurement method is relatively simple, which improves the measurement efficiency, reduces the detection cost, and is conducive to batch measurement.

[0020] As a further improvement, the outer circumferential surface of the internal spline corresponding to the plug gauge to be tested is a conical surface, or the tooth thickness of the external spline gradually decreases or increases along the axial direction of the positioning plug gauge.

[0021] The advantage of this design is that only one type of plug gauge and measuring bar needs to be set.

[0022] As a further improvement, the gauge holder is detachably fixed to the positioning ring gauge.

[0023] The beneficial effect is that after the measurement is completed, the gauge holder can be removed from the positioning ring gauge to facilitate the storage of the various parts of the testing device.

[0024] As a further improvement, the gauge holder is magnetically attached to the positioning ring gauge.

[0025] The advantage is that this design makes it easy to assemble and disassemble the watch holder.

[0026] As a further improvement, the positioning ring gauge has two handles evenly and at intervals.

[0027] The beneficial effect is that this design helps to apply force evenly to drive the positioning ring gauge to rotate, reducing measurement errors caused by uneven force during rotation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a speed reducer in the prior art;

[0029] Figure 2 This is a schematic diagram illustrating the application of Embodiment 1 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention.

[0030] Figure 3 This is a schematic diagram illustrating the application of Embodiment 2 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention.

[0031] Figure 4 This is a schematic diagram illustrating the application of Embodiment 1 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention.

[0032] Figure 5 This is a schematic diagram illustrating the application of Embodiment 2 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention.

[0033] Figure 1 In the middle: 11. Reducer; 12. Locating stop; 13. Outer circle; 14. Spline tooth tip; 15. Spline shaft;

[0034] Figure 2 and Figure 3 In the middle section: 21. Reducer; 22. Positioning ring gauge; 23. Handle; 24. Ring gauge to be tested; 25. Splined shaft; 26. Indicator holder; 27. Dial indicator; 28. Measuring bar; 29. ​​Positioning stop;

[0035] Figure 4 and Figure 5 In the middle: 31. Motor; 32. Positioning ring gauge; 33. Handle; 34. Plug gauge to be measured; 35. Spline sleeve; 36. Indicator holder; 37. Dial indicator; 38. Measuring bar; 39. Positioning stop. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, the terms "front," "rear," "upper," "lower," "left," and "right" are based on the orientation and positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention, not to indicate that the referred device or component must have a specific orientation, and therefore should not be construed as limiting the invention.

[0039] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0040] Example 1 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention:

[0041] like Figure 2 As shown, this embodiment uses the coaxiality detection of the splined shaft 25 on the reducer 21 as an example for explanation. The reducer 21 is provided with an annular positioning stop 29. In other embodiments, the coaxiality can also be detected on the splined shaft of the motor.

[0042] In this embodiment, the spline shaft coaxiality detection device for the motor / reducer assembly includes a positioning ring gauge 22 and a test ring gauge 24. The inner circumferential surface of the positioning ring gauge 22 is a smooth surface. The positioning ring gauge 22 is used for positioning and mounting on the positioning stop 29. The positioning ring gauge 22 can rotate relative to the positioning stop 29 along the circumference of the spline shaft 25. Both the positioning ring gauge 22 and the test ring gauge 24 are non-standard, self-made parts.

[0043] In this embodiment, a dial indicator holder 26 is fixed on the positioning ring gauge 22, and a dial indicator 27 is mounted on the holder 26. The ring gauge 24 to be tested is sleeved on the splined shaft 25. The inner circumferential surface of the ring gauge 24 to be tested has an internal spline, which is adapted to the external spline of the splined shaft 25. The outer circumferential surface of the ring gauge 24 to be tested is a smooth surface. The dial indicator 27 is used to measure the outer circumferential surface of the ring gauge 24 to be tested. Both the dial indicator 27 and the holder 26 are standard parts.

[0044] In this embodiment, the meter holder 26 is detachably fixed to the positioning ring gauge 22. After measurement, the meter holder 26 can be removed from the positioning ring gauge 22 for easy storage of the various parts of the testing device. Preferably, the meter holder 26 is fixed to the positioning ring gauge 22 by magnetic attraction, which facilitates the assembly and disassembly of the meter holder.

[0045] In this embodiment, two handles 23 are evenly spaced on the positioning ring gauge 22. This design facilitates the balanced application of force to drive the positioning ring gauge 22 to rotate, reducing measurement errors caused by uneven force during rotation. The handles 23 are knurled to increase friction when gripped.

[0046] In this embodiment, several ring gauges 24 to be tested are machined according to the different tooth thicknesses of the internal splines; several positioning ring gauges 22 are machined according to the size of the positioning stop 29.

[0047] During measurement, a test ring gauge 24 is selected and fitted onto the splined shaft 25, ensuring that the inner spline tooth side of the test ring gauge 24 is in close contact with the outer spline tooth side of the splined shaft 25. At this time, the outer circumferential surface of the test ring gauge 24 and the outer spline tooth side of the splined shaft 25 are coaxial. A positioning ring gauge 22 is selected and positioned and assembled on the positioning stop 29, ensuring that the positioning ring gauge 22 and the positioning stop 29 are in close contact and can rotate relative to each other. At this time, the positioning ring gauge 22 and the positioning stop 29 are coaxial. The positioning ring gauge 22 is driven to rotate on the positioning stop 29 by the handle 23, which causes the dial indicator 27 on the positioning ring gauge 22 to rotate one revolution. The value of the pointer jump of the dial indicator 27 is recorded. This value is the coaxiality of the outer circumferential surface of the test ring gauge 24 relative to the positioning stop 29, that is, the coaxiality of the outer spline tooth side relative to the positioning stop 29.

[0048] The spline coaxiality testing device of the present invention sets up a test ring gauge so that the coaxiality of the outer spline tooth side relative to the positioning stop is measured by a dial indicator on the positioning ring gauge on the outer circumferential surface of the test ring gauge. The measurement value is relatively accurate, which can accurately determine and select products with qualified coaxiality, ensuring the quality of the electric drive assembly. Moreover, the measurement method is relatively simple, which improves the measurement efficiency, reduces the inspection cost, and is conducive to batch measurement.

[0049] Example 2 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention:

[0050] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, the inner circumferential surface of the ring gauge 24 to be tested is provided with an internal spline for adapting to the external spline of the spline shaft 25. In this embodiment, as shown... Figure 3As shown, the inner circumferential surface of the ring gauge 24 to be tested does not have an internal spline, but instead has an additional measuring rod 28. The measuring rod 28 is a cylindrical measuring rod, and several specifications of the measuring rod 28 are provided. A suitable measuring rod 28 is selected and positioned between the inner circumferential surface of the ring gauge 24 to be tested and two adjacent spline teeth of the spline shaft 25, ensuring that the outer circumferential surface of the measuring rod 28 is in close contact with the inner circumferential surface of the ring gauge 24 to be tested and the tooth flanks of the spline teeth. In other embodiments, the inner circumferential surface of the ring gauge to be tested can be designed as a conical surface, in which case only one type of measuring rod is needed.

[0051] In this embodiment, the measuring rod 28 can be fixed in the grooves of all splines with grease.

[0052] In this embodiment, the coaxiality of the external spline tooth side relative to the positioning stop 29 is determined by measuring the inner circumferential surface of the ring gauge 24 under test using a dial indicator 27 on the positioning ring gauge 22.

[0053] Embodiment 3 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention:

[0054] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, several test ring gauges 24 were designed to ensure a tight fit between the inner spline tooth side of the test ring gauge 24 and the outer spline tooth side of the spline shaft 25. In this embodiment, the inner circumferential surface of the test ring gauge corresponding to the outer spline is designed as a conical surface, so only one test ring gauge needs to be designed. In other embodiments, if the inner circumferential surface of the test ring gauge corresponding to the outer spline is a cylindrical surface, the tooth groove of the inner spline can be designed to gradually decrease or increase along the axial direction of the positioning ring gauge, so only one test ring gauge needs to be designed.

[0055] Example 4 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention:

[0056] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the dial indicator 26 is magnetically attached to the positioning ring gauge 22 for detachment. In this embodiment, the dial indicator is fixed to the positioning ring gauge with screws for detachment.

[0057] Example 5 of the spline shaft coaxiality detection device for the motor / reducer assembly of the present invention:

[0058] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, two handles 23 are evenly spaced on the positioning ring gauge 22, and the positioning ring gauge 22 is driven to rotate by the handles 23. In this embodiment, a recess is machined on the outer circumferential surface of the positioning ring gauge, and the positioning ring gauge is driven to rotate by the recess.

[0059] Example 1 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention:

[0060] like Figure 4As shown, this embodiment uses the coaxiality detection of the spline sleeve 35 on the motor 31 as an example for explanation. The motor 31 has an annular positioning stop 39. In other embodiments, the coaxiality can also be detected on the spline sleeve on the reducer.

[0061] In this embodiment, the spline sleeve coaxiality detection device for the motor / reducer assembly includes a positioning ring gauge 32 and a plug gauge 34 to be tested. The inner circumferential surface of the positioning ring gauge 32 is a smooth surface. The positioning ring gauge 32 is used for positioning and mounting on the positioning stop 39. The positioning ring gauge 32 can rotate relative to the positioning stop 39 along the circumference of the spline sleeve 35. Both the positioning ring gauge 32 and the plug gauge 34 to be tested are non-standard, self-made parts.

[0062] In this embodiment, a dial indicator holder 36 is fixed on the positioning ring gauge 32, and a dial indicator 37 is mounted on the holder 36. The plug gauge 34 to be tested is inserted into the spline sleeve 35. An external spline is provided on the lower outer circumferential surface of the plug gauge 34, which is compatible with the internal spline of the spline sleeve 35. The upper outer circumferential surface of the plug gauge 34 is smooth. The dial indicator 37 is used to measure the upper outer circumferential surface of the plug gauge 34. Both the dial indicator 37 and the holder 36 are standard parts.

[0063] In this embodiment, the meter holder 36 is detachably fixed to the positioning ring gauge 32. After measurement, the meter holder 36 can be removed from the positioning ring gauge 32 for easy storage of the various parts of the testing device. Preferably, the meter holder 36 is fixed to the positioning ring gauge 32 by magnetic attraction, which facilitates the assembly and disassembly of the meter holder.

[0064] In this embodiment, two handles 33 are evenly spaced on the positioning ring gauge 32. This design facilitates the balanced application of force to drive the positioning ring gauge 32 to rotate, reducing measurement errors caused by uneven force during rotation. The handles 33 are knurled to increase friction when gripped.

[0065] In this embodiment, several plug gauges 34 are machined according to the different tooth thicknesses of the external splines; several positioning ring gauges 32 are machined according to the size of the positioning stop 39.

[0066] During measurement, a plug gauge 34 to be measured is inserted into the spline sleeve 35, ensuring that the outer spline tooth side of the plug gauge 34 is in close contact with the inner spline tooth side of the spline sleeve 35. At this time, the outer circumferential surface of the plug gauge 34 and the inner spline tooth side of the spline sleeve 35 are coaxial. A positioning ring gauge 32 is selected and positioned on the positioning stop 39, ensuring that the positioning ring gauge 32 and the positioning stop 39 are in close contact and can rotate relative to each other. At this time, the positioning ring gauge 32 and the positioning stop 39 are coaxial. The positioning ring gauge 32 is driven to rotate on the positioning stop 39 by the handle 33, which causes the dial indicator 37 on the positioning ring gauge 32 to rotate one revolution. The value of the pointer jump of the dial indicator 37 is recorded. This value is the coaxiality of the outer circumferential surface of the plug gauge 34 relative to the positioning stop 39, that is, the coaxiality of the inner spline tooth side relative to the positioning stop 39.

[0067] The spline coaxiality testing device of the present invention sets up a plug gauge to be tested, so that the coaxiality of the inner spline tooth side relative to the positioning stop is determined by measuring the outer circumferential surface of the plug gauge with a dial indicator on the positioning ring gauge. The measurement value is relatively accurate, which can accurately determine and select products with qualified coaxiality, ensuring the quality of the electric drive assembly. Moreover, the measurement method is relatively simple, which improves the measurement efficiency, reduces the testing cost, and is conducive to batch measurement.

[0068] Example 2 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention:

[0069] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, the outer circumferential surface of the lower part of the plug gauge 34 to be tested is provided with an external spline for adapting to the internal spline of the spline sleeve 35. In this embodiment, as... Figure 5 As shown, the lower outer circumferential surface of the plug gauge 34 does not have an external spline; instead, a measuring rod 38 is additionally provided. The measuring rod 38 is cylindrical and comes in several sizes. A suitable measuring rod 38 is selected and positioned between two adjacent spline teeth of the lower outer circumferential surface of the plug gauge 34 and the spline sleeve 35, ensuring that the outer circumferential surface of the measuring rod 38 is in close contact with the outer circumferential surface of the plug gauge 34 and the tooth flanks of the spline teeth. The measuring rod 38 can be fixed within the tooth grooves of all splines using grease. In other embodiments, the outer circumferential surface of the plug gauge can be designed as a conical surface, in which case only one type of measuring rod is needed.

[0070] Embodiment 3 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention:

[0071] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, several plug gauges 34 were designed to ensure a tight fit between the outer spline tooth side of the plug gauge 34 and the inner spline tooth side of the spline sleeve 35. In this embodiment, the outer circumferential surface of the inner spline corresponding to the plug gauge is designed as a conical surface, so only one plug gauge needs to be designed. In other embodiments, if the outer circumferential surface of the inner spline corresponding to the plug gauge is a cylindrical surface, the tooth thickness of the outer spline can be designed to gradually decrease or increase along the axial direction of the positioning plug gauge, so only one plug gauge needs to be designed.

[0072] Example 4 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention:

[0073] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the dial indicator 36 is magnetically attached to the positioning ring gauge 32 for detachment. In this embodiment, the dial indicator is fixed to the positioning ring gauge with screws for detachment.

[0074] Example 5 of the spline sleeve coaxiality detection device for the motor / reducer assembly of the present invention:

[0075] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, two handles 33 are evenly spaced on the positioning ring gauge 32, and the positioning ring gauge 32 is driven to rotate by the handles 33. In this embodiment, a recess is machined on the outer circumferential surface of the positioning ring gauge, and the positioning ring gauge is driven to rotate by the recess.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A spline shaft coaxiality detection device for a motor / reducer assembly, characterized by, The device includes a positioning ring gauge (22) for positioning and mounting on the positioning stop (29) and a test ring gauge (24) for fitting on the spline shaft (25). The inner circumferential surface of the positioning ring gauge (22) is a smooth surface, and the positioning ring gauge (22) can rotate relative to the positioning stop (29) along the circumference of the spline shaft (25). A dial indicator frame (26) is fixed on the positioning ring gauge (22), and a dial indicator (27) for measuring the outer or inner circumferential surface of the test ring gauge (24) is installed on the dial indicator frame (26). The inner circumferential surface of the test ring gauge (24) is provided with an internal spline for matching the external spline of the spline shaft (25), or the spline shaft coaxiality detection device includes a measuring bar (28) for matching the inner circumferential surface of the test ring gauge (24) and the two adjacent spline teeth of the spline shaft (25).

2. The spline shaft coaxiality detection apparatus for a motor / reducer assembly according to claim 1, characterized by, The inner circumferential surface of the external spline corresponding to the ring gauge (24) is a conical surface, or the tooth groove of the internal spline gradually decreases or increases along the axial direction of the positioning ring gauge (24).

3. The spline shaft coaxiality detection apparatus for a motor / reducer assembly according to claim 1 or 2, characterized by, The table holder (26) is detachably fixed to the positioning ring gauge (22).

4. The spline shaft coaxiality detection device for the motor / reducer assembly according to claim 3, characterized in that, The stand (26) is fixed to the positioning ring gauge (22) by magnetic attraction.

5. The spline shaft coaxiality detection device for the motor / reducer assembly according to claim 1 or 2, characterized in that, Two handles (23) are evenly and spaced on the positioning ring gauge (22).

6. A device for detecting the coaxiality of the spline sleeve of a motor / reducer assembly, characterized in that, The device includes a positioning ring gauge (32) for positioning and mounting on the positioning stop (39) and a plug gauge (34) for insertion into the spline sleeve (35). The inner circumferential surface of the positioning ring gauge (32) is a smooth surface, and the positioning ring gauge (32) can rotate relative to the positioning stop (39) along the circumference of the spline sleeve (35). A dial indicator (36) is fixed on the positioning ring gauge (32), and a dial indicator (37) for measuring the outer circumferential surface of the plug gauge (34) is installed on the dial indicator (36). The outer circumferential surface of the plug gauge (34) is provided with an external spline for matching the inner spline of the spline sleeve (35), or the spline sleeve coaxiality detection device also includes a measuring bar (38) for matching the outer circumferential surface of the plug gauge (34) and the two adjacent spline teeth of the spline sleeve (35).

7. The spline sleeve coaxiality detection device for the motor / reducer assembly according to claim 6, characterized in that, The outer circumferential surface of the inner spline corresponding to the plug gauge (34) is a conical surface, or the tooth thickness of the outer spline gradually decreases or increases along the axial direction of the positioning plug gauge (34).

8. The spline sleeve coaxiality detection device for the motor / reducer assembly according to claim 6 or 7, characterized in that, The table holder (36) is detachably fixed to the positioning ring gauge (32).

9. The spline sleeve coaxiality detection device for the motor / reducer assembly according to claim 8, characterized in that, The stand (36) is fixed to the positioning ring gauge (32) by magnetic attraction.

10. The spline sleeve coaxiality detection device for the motor / reducer assembly according to claim 6 or 7, characterized in that, Two handles (33) are evenly and spaced on the positioning ring gauge (32).

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