A gear train detection apparatus

Abstract

The application discloses a gear train detection device. In the gear train detection device, a driving shaft of a first mounting part is coaxially arranged with an input shaft of a gear train. The driving shaft is clamped with the input shaft in the rotation direction of the driving shaft. A first centering sleeve of a second mounting part is rotationally connected with an intermediate shaft of the gear train. The first mounting part moves towards or away from the second mounting part in the radial direction of the driving shaft. The gear train detection device provided by the application can realize the mutual engagement of the driving gear and the driven gear by arranging the movable mounting part for positioning the gear train and the displacement sensor for detecting the displacement of the mounting part, so that the transmission error caused by the installation error between the gear train and the box can be reduced. Meanwhile, the rotation angle of the gear teeth of the driving gear and the gear teeth of the driven gear is detected by the angle encoder, which is also beneficial to improving the detection accuracy of the engagement degree of the gear train.

Description

Technical Field

[0001] This application relates to the field of gear testing technology, and in particular to a gear system testing device. Background Technology

[0002] Gear systems generally include two main series: fixed-axis gear systems and planetary gear systems. They can realize split-path transmission and speed change transmission, and are widely used in watches, gearboxes, and other applications.

[0003] In automotive transmissions, the primary cause of whistling noise is low gear meshing precision. Specifically, during the meshing transmission between the driving and driven gears, the resulting excitations (including stiffness excitation, transmission error excitation, and meshing impact excitation) cause periodic vibrations in the transmission, thus generating noise. Therefore, the meshing precision of the gear system inside the transmission needs to be tested before it leaves the factory. Currently, the meshing precision test of the gear system inside the transmission is performed after assembly. However, during the installation of the gear system onto the transmission housing, there may be installation deviations between the gear system and the housing, which directly affects the accuracy of the meshing precision test. Furthermore, when the meshing precision test fails, it is impossible to accurately determine the specific cause affecting the meshing precision.

[0004] Therefore, how to improve the accuracy of gear meshing detection has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a gear train testing device for improving the accuracy of gear train meshing detection.

[0006] This application provides a gear train detection device. The gear train includes an input shaft, a driving gear, an intermediate shaft, and a first driven gear. The input shaft is inserted into the inner hole of the driving gear, and the intermediate shaft is inserted into the inner hole of the first driven gear. The driving gear is used to mesh with the first driven gear. The gear train detection device includes a first mounting part, a second mounting part, a first displacement sensor, a first angle encoder, and a second angle encoder. The first mounting part includes a drive shaft, which is coaxially arranged with the input shaft and is used to engage with the input shaft along the rotation direction of the drive shaft. The second mounting part includes a first centering sleeve, which is coaxially arranged with the intermediate shaft and is rotatably connected to the intermediate shaft. The first mounting part moves toward or away from the second mounting part along the radial direction of the drive shaft. The first displacement sensor is connected to the first mounting part and is used to detect the moving distance of the first mounting part. The first angle encoder is connected to the first mounting part and is used to detect the rotation angle of the teeth of the driving gear. The second angle encoder is connected to the second mounting part and is used to detect the rotation angle of the teeth of the first driven gear.

[0007] Using the gear system testing equipment provided in this application, during the movement of the first mounting part radially toward the second mounting part along the drive shaft, the first displacement sensor can accurately obtain the moving distance of the first mounting part, thereby obtaining the center distance between the input shaft and the intermediate shaft. This can improve the installation accuracy of the input shaft and the intermediate shaft, and at the same time, improve the meshing accuracy of the driving gear and the first driven gear.

[0008] Furthermore, since the first angle encoder is connected to the first mounting part to detect the rotation angle of the teeth of the driving gear, and the second angle encoder is connected to the second mounting part to detect the rotation angle of the teeth of the first driven gear, the actual rotation angles of the teeth of the driving gear and the driven gear can be obtained through the angle encoders during the rotation of the driven gear driven by the driving gear. Then, by comparing the actual rotation angle of the teeth of the driving gear with the theoretical rotation angle, and by comparing the actual rotation angle of the teeth of the driven gear with the theoretical rotation angle, it can be determined whether the meshing degree of the gear system meets the theoretical range.

[0009] When the meshing degree exceeds the theoretical range, linear fitting can be performed on the rotation angle data of the teeth of the driving gear and the driven gear obtained by the angle encoder to determine whether the driving gear and the driven gear themselves meet the manufacturing requirements.

[0010] It is understandable that, since the first mounting part can move toward or away from the second mounting part along the radial direction of the drive shaft, the gear train testing equipment can meet the center distance requirements of gear trains of different specifications by adjusting the moving distance of the first mounting part, which is beneficial to improving the versatility of the gear train testing equipment.

[0011] In one possible implementation of this application, the second mounting part further includes a first centering structure, which penetrates the bottom surface of the first centering sleeve along its axial direction. A portion of the first centering structure is located within the first centering sleeve and is coaxial with it. Along the axial direction of the first centering sleeve, the first centering structure is used to abut against the intermediate shaft. Using the gear train testing equipment provided in this application, by having the first centering structure abut against the intermediate shaft along the axial direction of the first centering sleeve, it is beneficial to reduce the offset of the intermediate shaft's axis along the direction of gravity, thereby effectively improving the rotational stability of the intermediate shaft and enhancing the validity of the testing data.

[0012] In one possible implementation of this application, the gear system further includes a bearing inner ring fitted onto the intermediate shaft, and a first centering sleeve including a bearing outer ring fitted onto the outside of the bearing inner ring. This satisfies the requirement for rotational connection between the first centering sleeve and the intermediate shaft while improving the structural simplicity of the second mounting portion.

[0013] In one possible implementation of this application, the input shaft includes a blind hole along its axial direction, within which an internal spline is provided. A spline is also provided on the side of the drive shaft closest to the input shaft, and this spline is inserted into the internal spline. This achieves synchronous rotation between the drive shaft and the input shaft while simplifying the structure of the first mounting portion.

[0014] In one possible implementation of this application, the drive shaft includes a stepped shaft, with the smaller diameter portion of the stepped shaft closer to the input shaft than the larger diameter portion. The smaller diameter portion of the stepped shaft is provided with a spline. The end face of the larger diameter portion of the stepped shaft is used to abut against the end face of the input shaft, so that when the input shaft is installed in the first mounting portion, the first mounting portion supports the input shaft along the direction of gravity, which helps to improve the installation stability of the input shaft.

[0015] In one possible implementation of this application, the gear train testing device further includes a first mating part, which is disposed opposite to a first mounting part along the axial direction of the drive shaft, and the first mating part and the first mounting part are used to mount an input shaft. Along the axial direction of the drive shaft, the first mating part moves toward or away from the first mounting part, and the first mating part is used to abut against the input shaft, which helps to improve the installation stability of the input shaft. Furthermore, since both the first mounting part and the first mating part limit the input shaft in multiple directions, the risk of data distortion due to installation errors can be effectively reduced during gear train testing.

[0016] In one possible implementation of this application, the first mating part further includes a second centering structure, which extends toward the first mounting part along the axial direction of the drive shaft. The second centering structure is used to abut against the input shaft along the axial direction of the drive shaft. This helps to reduce the offset of the input shaft's axis along the direction of gravity, thereby effectively improving the rotational stability of the input shaft and enhancing the validity of the detection data.

[0017] In one possible implementation of this application, the gear train testing device further includes a second mating part, which is disposed opposite to the second mounting part along the axial direction of the first centering sleeve; and an intermediate shaft is disposed between the second mating part and the second mounting part. The second mating part moves toward or away from the second mounting part along the axial direction of the first centering sleeve, and the second mating part is used to abut against the intermediate shaft, which helps to improve the installation stability of the intermediate shaft. Furthermore, since both the second mounting part and the second mating part limit the intermediate shaft in multiple directions, the risk of data distortion due to installation errors can be effectively reduced during the gear train testing process.

[0018] In one possible implementation of this application, the second mounting part further includes a first surface along the axial direction of the first centering sleeve. The first surface is opposite to the intermediate shaft relative to the first centering sleeve, and the first centering sleeve is detachably mounted on the first surface. Using the gear train testing equipment provided in this application, since the first centering sleeve and the first surface are detachably connected, users can replace different specifications of positioning sleeves and bearing outer rings according to actual needs, thereby improving the versatility of the equipment.

[0019] In one possible implementation of this application, the gear train testing device further includes an elastic structure located between the first centering sleeve and the first surface, and connected to both the first centering sleeve and the first surface. This prevents a rigid connection between the second mating part and the intermediate shaft, as well as the first mounting part, when the second mating part abuts against the intermediate shaft, thereby improving the reliability of the device.

[0020] In one possible implementation of this application, the gear train further includes a first output end, a second driven gear, and a third driven gear. An intermediate shaft is inserted into the inner hole of the second driven gear, and the first output end is drive-connected to the third driven gear. The second driven gear meshes with the third driven gear. The gear train detection device further includes a third mounting part, a second displacement sensor, and a third angle encoder. Along the radial direction of the first centering sleeve, the second mounting part is located between the first and third mounting parts, and the third mounting part is positioned opposite to the first output end. The third mounting part includes a second centering sleeve, which is coaxially arranged with and rotatably connected to the first output end. Along the radial direction of the third centering sleeve, the third mounting part moves toward or away from the second mounting part. The second displacement sensor is connected to the third mounting part and is used to detect the moving distance of the third mounting part. The second angle encoder is used to detect the rotation angle of the teeth of the first and second driven gears. The third angle encoder is connected to the third mounting part and is used to detect the rotation angle of the teeth of the third driven gear.

[0021] Using the gear system testing equipment provided in this application, during the movement of the first mounting part and the third mounting part radially toward the second mounting part along the drive shaft, the first displacement sensor and the second displacement sensor accurately obtain the moving distance of the input shaft and the first output end, thereby obtaining the center distance between the input shaft and the intermediate shaft, and the center distance between the first output end and the central shaft. This can improve the installation accuracy of the input shaft, the intermediate shaft and the first output end, while also improving the meshing accuracy of the driving gear and the driven gear.

[0022] Furthermore, since the first angle encoder is used to detect the rotation angle of the teeth of the driving gear, the second angle encoder is used to detect the rotation angle of the teeth of the first and second driven gears, and the third angle encoder is used to detect the rotation angle of the teeth of the third driven gear, the actual rotation angles of the teeth of the driving gear and the driven gears can be obtained through the angle encoders during the rotation of the driving gear driving the driven gears. Then, by comparing the actual rotation angle of the driving gear teeth with the theoretical rotation angle, and by comparing the actual rotation angle of each driven gear with the theoretical rotation angle, it can be determined whether the meshing degree of the gear system meets the theoretical range.

[0023] In one possible implementation of this application, the gear train further includes a second output end along the axial direction of the third driven gear. The first and second output ends are positioned opposite each other, and the second output end is connected to the third driven gear in a transmission manner. The gear train testing device also includes a third mating part along the axial direction of the second centering sleeve, which is positioned opposite to the third mounting part. Along the axial direction of the second centering sleeve, the third mating part moves toward or away from the third mounting part and is used for rotatable connection with the second output end. This helps improve the installation stability of the second output end. Furthermore, since both the third mounting part and the third mating part limit the second output end in multiple directions, the risk of data distortion due to installation errors can be effectively reduced during the gear train testing process.

[0024] In one possible implementation of this application, the gear train testing device further includes a loading device for applying different loads to the first output end and the second output end. This allows for applying different loads to the first and second output ends according to testing requirements, thereby improving the adaptability of the device. Attached Figure Description

[0025] Figure 1 A schematic diagram of a gear system provided in this application;

[0026] Figure 2 A schematic diagram of a gear system testing device provided in this application;

[0027] Figure 3 for Figure 2 A partial structural schematic diagram of the provided gear system testing equipment;

[0028] Figure 4 for Figure 2 Another partial structural diagram of the provided gear system testing equipment;

[0029] Figure 5 for Figure 2 Another partial structural diagram of the provided gear system testing equipment;

[0030] Figure 6 for Figure 2 A partial enlarged view of point A on the provided gear train testing equipment;

[0031] Figure 7 for Figure 4 A schematic diagram of the structure at point B of the provided gear train testing equipment;

[0032] Figure 8 yes Figure 2 A partial schematic diagram of the provided gear system testing equipment.

[0033] Reference numerals: 01-Input shaft; 02-Driving gear; 03-Intermediate shaft; 04-First driven gear; 05-First output end; 06-Second driven gear; 07-Third driven gear; 08-Second output end; 1-First mounting part; 11-Drive shaft; 111-Spline; 2-Second mounting part; 21-First centering sleeve; 211-Positioning sleeve; 22-First centering structure; 23-Second support structure; 24-First surface; 3-First displacement sensor; 4-First angle encoder; 5-Second angle encoder; 6-First mating part; 61-First support structure; 62-Second centering Structure; 63-Cylinder connector mounting plate; 7-First mounting bracket; 8-Second mating part; 9-Second mounting bracket; 91-Limiting block; 10-Main mounting bracket; 1001-Clamping arm; 1002-Auxiliary slide rail; 101-Cylinder; 1011-Cylinder connector; 102-Slide plate; 103-Elastic structure; 104-Guide post; 105-Third mounting part; 1051-Second centering sleeve; 1052-First loading shaft; 106-Third mounting bracket; 107-Third angle encoder; 108-Third mating part; 1081-Third centering sleeve; 1082-Second loading shaft; 109-Loading device. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0035] It should be noted that specific details are set forth in the following description to facilitate 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 extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] Gear systems generally include two main series: fixed-axis gear systems and planetary gear systems. They can achieve split-path transmission and speed change transmission, and are widely used in watches, gearboxes, and other applications. This application will use an automotive gearbox as an example to provide a detailed description of gear system testing equipment.

[0037] In automotive transmissions, the primary cause of whistling noise is low gear meshing. Specifically, during the meshing transmission between the driving and driven gears, the excitations generated (including stiffness excitation, transmission error excitation, and meshing impact excitation) cause periodic vibrations in the transmission, resulting in noise. Therefore, before the transmission leaves the factory, the meshing degree of its internal gear system needs to be tested, i.e., the transmission error (TE) needs to be measured. TE is the deviation between the actual and ideal transmission of the gears, and it describes the smoothness of gear transmission. Specifically, transmission error refers to the fact that when the ideal tooth profiles of the driving and driven gears mesh, the driven gear should be driven at a constant speed by the driving gear. However, due to various reasons such as manufacturing errors, assembly errors, or elastic deformation of the tooth surfaces under load, the driving gear tooth profile needs to rotate an additional angle δ, moving an additional distance along the ideal meshing line before the actual tooth profiles of the driving and driven gears mesh. This additional distance is the transmission error.

[0038] Currently, the meshing degree of the gear train inside the transmission is tested after the transmission is assembled. It's important to note that transmission assembly refers to installing the internal components into the upper and lower transmission housings, followed by fastening and sealing the upper and lower housings to achieve a rigid connection. The upper housing primarily functions to mate with the lower housing, positioning the internal gear train to prevent wobbling or disengagement during actual operation. However, during the installation of the gear train into the transmission housing, installation errors may exist relative to the housing. This can lead to faulty engagement (TE) results, directly affecting the accuracy of the TE test. Furthermore, when the TE test fails, it's impossible to accurately determine the specific cause of the TE, i.e., whether it's due to manufacturing errors in the gears themselves or installation errors between the gear train and the housing.

[0039] In view of this, the gear train testing equipment provided in this application, by setting up multiple movable positioning structures for positioning the gear train, allows the transmission shaft of the gear train to be positioned on corresponding positioning structures during gear train testing. The meshing of the driving gear and driven gear is achieved by moving the positioning structures, thus avoiding TE (Technical Error) caused by installation errors between the gear train and the housing, and improving the accuracy of gear train meshing degree detection. To make the objectives, technical solutions, and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] refer to Figure 1 , Figure 1 This is a schematic diagram of a gear system provided in this application. The gear system includes an input shaft 01, a driving gear 02, an intermediate shaft 03, and a first driven gear 04. The input shaft 01 is inserted into the gear inner hole of the driving gear 02, and the intermediate shaft 03 is inserted into the gear inner hole of the first driven gear 04. The driving gear 02 is used to mesh with the first driven gear 04.

[0041] refer to Figure 2 , Figure 2 This is a schematic diagram of a gear train testing device provided in this application. The gear train testing device includes a first mounting part 1, a second mounting part 2, and a first displacement sensor (…). Figure 2 (Not shown in the image) A first angle encoder 4 and a second angle encoder 5, wherein the first mounting part 1 includes a drive shaft 11, which is coaxially arranged with the input shaft 01. And along the rotation direction of the drive shaft 11, the drive shaft 11 is used to... Figure 1 The input shaft 01 is engaged so that the drive shaft 11 can drive the input shaft 01 to rotate synchronously.

[0042] In an optional implementation, along the axial direction of the input shaft O1 ( Figure 1 (As shown in the Z direction), input shaft 01 includes a blind hole, within which an internal spline is provided. (Reference) Figure 1 and Figure 3 , Figure 3 for Figure 2 A partial structural diagram of the provided gear system testing equipment is provided to illustrate the structure of the first mounting part 1. Specifically, a spline 111 is provided on the side of the drive shaft 11 near the input shaft 01, and the spline 111 is inserted into an internal spline, so as to achieve synchronous rotation of the drive shaft 11 and the input shaft 01 while making the structure of the first mounting part 1 simpler. It can be understood that the spline 111 mentioned above is an external spline.

[0043] It is worth mentioning that you should continue to refer to Figure 3The drive shaft 11 includes a stepped shaft, with the smaller diameter portion of the stepped shaft closer to the input shaft 01 than the larger diameter portion, and the smaller diameter portion of the stepped shaft is provided with a spline 111. And along the direction of gravity (e.g., Figure 3 (As shown in the Z direction), the end face of the larger diameter portion of the stepped shaft is used to abut against the end face of the input shaft 01, so that when the input shaft 01 is installed on the first mounting part 1, the first mounting part 1 supports the input shaft 01 in the direction of gravity, which helps to improve the installation stability of the input shaft 01, thereby further improving the detection accuracy of the meshing degree of the gear system.

[0044] The end face of the larger diameter portion of the aforementioned stepped shaft can be, for example, a tapered surface, and the end face of the corresponding input shaft 01 is also a tapered surface, in order to further improve the coaxiality of the input shaft 01 and the drive shaft 11.

[0045] Additionally, refer to Figure 4 , Figure 4 for Figure 2 Another partial structural diagram of the provided gear testing equipment is used to show the structure of the second mounting part 2. Specifically, the second mounting part 2 includes a first centering sleeve 21, which is coaxially arranged with the intermediate shaft 03 and rotatably connected to the intermediate shaft 03.

[0046] It should be noted that this application does not limit the specific implementation of the rotational connection between the intermediate shaft 03 and the first centering sleeve 21. For example, the gear system may include an inner ring of a bearing, which is sleeved on the intermediate shaft 03. The first centering sleeve 21 may include an outer ring of a bearing, which is sleeved on the outside of the inner ring of the bearing. This can satisfy the requirement of rotational connection between the first centering sleeve 21 and the intermediate shaft 03 while improving the structural simplicity of the second mounting part 2.

[0047] It should be noted that the inner ring of the bearing can be the inner ring of a separable bearing, and the outer ring of the bearing can be the outer ring of a separable bearing. Furthermore, after the intermediate shaft 03 is installed on the first centering sleeve 21, the outer ring of the bearing, fitted over the outer ring of the inner ring, forms a complete bearing, which can meet the normal operating requirements of the bearing and the actual testing requirements of the gear system. Additionally, for example, the mating surface between the inner and outer rings of the bearing can be a tapered surface to withstand the axial load of the intermediate shaft 03.

[0048] Using the gear system testing equipment provided in this application, during the movement of the first mounting part 1 radially toward the second mounting part 2 along the drive shaft 11, the first displacement sensor can accurately obtain the moving distance of the first mounting part 1, thereby obtaining the center distance between the input shaft 01 and the intermediate shaft 03. This can improve the installation accuracy of the input shaft 01 and the intermediate shaft 03, and at the same time, it is beneficial to improve the meshing accuracy of the driving gear 02 and the first driven gear 04.

[0049] Furthermore, since the first angle encoder 4 is connected to the first mounting part 1 to detect the rotation angle of the teeth of the driving gear 02, and the second angle encoder 5 is connected to the second mounting part 2 to detect the rotation angle of the teeth of the first driven gear 04, the actual rotation angles of the teeth of the driving gear 02 and the driven gear can be obtained through the angle encoders during the rotation of the driven gear 04 driven by the driving gear 02. Then, by comparing the actual rotation angle of the teeth of the driving gear 02 with the theoretical rotation angle, and by comparing the actual rotation angle of the driven gear with the theoretical rotation angle, it can be determined whether the TE of the gear system meets the theoretical range.

[0050] When TE exceeds the theoretical range, linear fitting can be performed on the rotation angle data of the teeth of the driving gear 02 and the driven gear obtained by the angle encoder to determine whether the driving and driven gears themselves meet the manufacturing requirements.

[0051] It is understandable that, since the first mounting part 1 can move toward or away from the second mounting part 2 along the radial direction of the drive shaft 11, the gear train testing equipment can meet the center distance requirements of gear trains of different specifications by adjusting the moving distance of the first mounting part 1, which is beneficial to improving the versatility of the gear train testing equipment.

[0052] In addition, the gear system testing equipment provided in this application also includes a drive unit for outputting power to the drive shaft 11. It should be noted that this application does not limit the specific form of the drive unit. For example, the drive unit includes a coupling, a reducer, and a servo motor, and the servo motor is connected to the drive shaft 11 through the reducer and the coupling.

[0053] In a specific embodiment, such as Figure 4 As shown, the second mounting part 2 may further include a first centering structure 22 for abutting against the intermediate shaft 03. Specifically, along the axial direction of the first centering sleeve 21, the first centering structure 22 penetrates the bottom surface of the first centering sleeve 21, and a portion of the first centering structure 22 is located inside the first centering sleeve 21 and coaxial with the first centering sleeve 21. Thus, it is possible to abut against the intermediate shaft 03 by means of the axial direction of the first centering sleeve 21 (e.g., along the axial direction of the first centering sleeve 21). Figure 4 (as shown in the Z direction) so that the first centering structure 22 abuts against the intermediate shaft 03, which helps to reduce the offset of the axis of the intermediate shaft 03 along the direction of gravity (Z direction), improve the coaxiality of the intermediate shaft 03 and the first centering sleeve 21, thereby effectively improving the rotational stability of the intermediate shaft 03 and improving the validity of the detection data.

[0054] When specifically setting the first centering structure 22, it can be exemplarily a rod-shaped structure. In addition, the end of the first centering structure 22 near the intermediate shaft 03 along the axial direction can be a conical head, and the head of the conical head abuts against the position of one end of the intermediate shaft 03 near the axis center. This can further reduce the offset of the axis of the intermediate shaft 03 along the direction of gravity (Z direction), thereby further improving the effectiveness of the detection data.

[0055] In a specific embodiment, such as Figure 3 As shown, the gear train testing equipment also includes a first mating part 6 and a first mounting bracket 7, along the axial direction of the drive shaft 11 (e.g., Figure 3 (As shown in the Z direction), the first mating part 6 and the first mounting part 1 are disposed opposite to each other and are respectively mounted on the first mounting bracket 7. Meanwhile, the first mating part 6 and the first mounting part 1 are used for setting... Figure 1 The input axis 01 is shown.

[0056] Furthermore, along the axial direction of the drive shaft 11, the first mating part 6 can move toward or away from the first mounting part 1 to abut against the input shaft 01, which helps to improve the installation stability of the input shaft 01. Moreover, since both the first mounting part 1 and the first mating part 6 limit the input shaft 01 in multiple directions, the risk of data distortion due to installation errors can be effectively reduced during gear system testing.

[0057] It is understandable that, along the axial direction of the drive shaft 11, the first mounting bracket 7 can also be provided with a linear guide rail, and the first mating part 6 can move towards or away from the first mounting part 1 along the linear guide rail, which helps to improve the movement stability of the first mating part 6. Furthermore, the first mating part 6 is also provided with a guide rail clamp, so that after the first mating part 6 moves to a predetermined position, it can be fixed by the guide rail clamp.

[0058] Furthermore, as described above, the first angle encoder 4 is used to detect the rotation angle of the teeth of the drive gear 02. Its position can be selected and set according to actual needs. For example, the first angle encoder 4 can be installed on the first mating part 6. The first angle encoder 4 can also be, for example, a read / write head and a grating ruler. The read / write head can rotate synchronously with the input shaft 01, which helps improve the accuracy of the detection data acquisition.

[0059] The first displacement sensor 3 can be set at a position according to actual needs. For example, it can be installed on the first mounting bracket 7 to improve the compactness of the gear system detection equipment while satisfying the need to detect the movement displacement of the first mounting part 1.

[0060] It is worth mentioning that you should continue to refer to Figure 3The first mating part 6 further includes a first support structure 61 and a second centering structure 62. The first support structure 61 is mounted on the first mounting bracket 7. Along the axial direction of the drive shaft 11, the second centering structure 62 penetrates the first support structure 61 and extends toward the first mounting part 1. Furthermore, along the axial direction of the drive shaft 11, the second centering structure 62 is used to abut against the input shaft 01. This helps to reduce the offset of the input shaft 01's axis along the direction of gravity (Z direction), improves the coaxiality of the input shaft 01 and the drive shaft 11, thereby effectively improving the rotational stability of the input shaft 01 and enhancing the validity of the detection data.

[0061] It should be noted that during equipment operation, the second centering structure 62 will rotate synchronously with the input shaft 01. Furthermore, this application does not limit the specific structure of the second centering structure 62; the exemplary structure of the second centering structure 62 can be referenced to the structure of the first centering structure 22, and will not be repeated here.

[0062] In one alternative embodiment, the first mating part 6 includes a mounted bearing, and the second centering structure 62 is fixedly connected to the inner ring of the mounted bearing, for example, by means of a lock nut. The bearing housing of the mounted bearing is connected to the first support structure 61 to meet the requirement that the second centering structure 62 rotates synchronously with the input shaft 01.

[0063] It is understandable that the connection between the first centering structure 22 and the first mounting bracket 7 can also be achieved by referring to the above-mentioned structural form, and will not be repeated here.

[0064] In a specific embodiment, such as Figure 4 As shown, the gear train testing equipment also includes a second mating part 8 and a second mounting bracket 9. Along the axial direction of the first centering sleeve 21, the second mating part 8 and the second mounting part 2 are arranged opposite to each other and are respectively mounted on the second mounting bracket 9. At the same time, an intermediate shaft 03 is arranged between the second mating part 8 and the second mounting part 2.

[0065] Furthermore, along the axial direction of the first centering sleeve 21, the second mating part 8 can move toward or away from the second mounting part 2, so that the second mating part 8 abuts against the intermediate shaft 03, which helps to improve the installation stability of the intermediate shaft 03. And since both the second mounting part 2 and the second mating part 8 limit the intermediate shaft 03 in multiple directions, the risk of data distortion due to installation errors can be effectively reduced during gear system testing.

[0066] It should be noted that the second mating part 8 may also be provided with a first centering sleeve, and the intermediate shaft 03 is provided with a bearing inner ring in the direction corresponding to the second mating part 8 and the second mounting part 2, so as to match with the bearing outer ring of the first centering sleeve of the second mating part 8 and the bearing outer ring of the first centering sleeve of the second mounting part 2 respectively. This can further reduce the offset of the axis of the intermediate shaft 03 in the Z direction, and also make the structure of the second mating part 8 simpler.

[0067] It is understandable that the second mounting bracket 9 is also provided with a linear guide along the axial direction of the intermediate shaft 03, and the second mating part 8 can move toward or away from the second mounting part 2 along the linear guide, which is beneficial to improving the movement stability of the second mating part 8.

[0068] In addition, the second mating part 8 is also provided with a guide rail clamp so that after the second mating part 8 moves to a predetermined position, the second mating part 8 can be fixed by the guide rail clamp.

[0069] As described above, the second angle encoder 5 is used to detect the rotation angle of the teeth of the driven gear. Its position can be selected according to actual needs. For example, the second angle encoder 5 can be installed on the second mounting part 2 to detect the intermediate rotation angle.

[0070] In a specific embodiment, such as Figure 2 As shown, the gear system testing equipment also includes a main mounting frame 10. Along the Y direction, the main mounting frame 10 is also equipped with a linear guide rail, and the first mounting frame 7 can move along the linear guide rail towards the second mounting frame 9. This improves the movement stability of the first mounting frame 7 and also enhances the overall integrity of the equipment. Furthermore, the first mounting frame 7 is equipped with a guide rail clamp to fix it in place after it has moved to a predetermined position.

[0071] Continue to refer to Figure 4 The second mounting bracket 9 also includes limit blocks 91 at its top and bottom. Additionally, Figure 5 for Figure 2 Another partial structural diagram of the provided gear train testing equipment is provided to illustrate the structure of the main mounting frame 10. The main mounting frame 10 also includes a set of clamping arms 1001, with the two clamping arms 1001 arranged opposite each other along the Y direction. See also... Figure 4 and Figure 5 Each limiting block 91 is located between a set of clamping arms 1001 to fine-tune the position of the second mounting bracket 9 along the Y direction via the clamping arms 1001. This helps to further improve the setting accuracy of the center distance between the intermediate shaft 03 and the input shaft 01, as well as the parallelism between the intermediate shaft 03 and the input shaft 01, thereby improving the detection accuracy of the gear system.

[0072] The gear system testing equipment is also equipped with a drive device for moving the first mounting frame 7. The drive device can be exemplarily composed of a servo motor, a coupling, and a ball screw, with the ball screw mounted on the main mounting frame 10 for connecting to the first mounting frame 7.

[0073] It is worth mentioning that, for reference Figure 6 , Figure 6 for Figure 2 The provided enlarged view of point A of the gear train testing equipment shows that the first mating part 6 includes a cylinder connector mounting plate 63, and along the Z direction, as shown... Figure 2 As shown, the cylinder connector mounting plate 63 is positioned away from the first mounting portion 1. The main mounting bracket 10 also includes an auxiliary slide rail 1002, which extends along the Y direction and is slidably connected to the cylinder connector mounting plate 63 along the Y direction. This improves the reliability of the connection between the first mating portion 6 and the main mounting bracket 10, as well as the stability of the movement of the first mating portion 6.

[0074] In addition, the gear system testing equipment also includes a cylinder 101. Along the Z-direction, the cylinder 101 is mounted on the main mounting bracket 10 and is positioned away from the first mounting portion 1 relative to the first mating portion 6. During the sliding process of the first mounting bracket 7 toward the second mounting bracket 9, the cylinder connector 1011 can slide into the slot of the cylinder connector mounting plate 63, so that the cylinder connector mounting plate 63 and the cylinder connector 1011 engage along the Z-direction. This allows the cylinder connector 1011 to drive the first mating portion 6 to move toward or away from the first mounting portion 1 along the Z-direction.

[0075] It should be noted that this application does not limit the specific structure of the cylinder connector mounting plate 63. For example, such as Figure 3 As shown, it can be two inverted L-shaped structures arranged opposite each other and spaced apart along the X direction, so as to make the structure of the cylinder connector mounting plate 63 simpler while meeting functional requirements. Alternatively, the cylinder connector mounting plate 63 can also be a one-piece structure to improve its structural strength.

[0076] It is understandable that the second mating part 8 can also be controlled by a cylinder to move toward or away from the second mounting part 2, and the connection method between the second mating part 8 and the cylinder connector can also be achieved by referring to the structure of the cylinder structure mounting plate described above.

[0077] In one specific embodiment, reference is also made to Figure 2 and Figure 7 , Figure 7 for Figure 4A schematic diagram of the structure at point B of the provided gear train testing equipment. The second mounting part 2 includes a second support structure 23 and a first surface 24, with the second support structure 23 mounted on the second mounting bracket 9, and the first surface 24 located on the second support structure 23. Furthermore, along the axial direction of the first centering sleeve 21, the first surface 24 is opposite to the intermediate shaft 03 relative to the first centering sleeve 21. Additionally, the first centering sleeve 21 may include a positioning sleeve 211, with the outer ring of the bearing embedded within the positioning sleeve 211. The bottom surface of the positioning sleeve 211 and the first surface 24 can, by way of example, be connected via bolts.

[0078] The gear system testing equipment provided in this application allows users to replace the positioning sleeve 211 and bearing outer ring of different specifications according to actual needs, since the positioning sleeve 211 and the second support structure 23 are detachably connected, thereby improving the versatility of the equipment.

[0079] In addition, this application does not limit the specific structure of the positioning sleeve 211. For example, it can be cylindrical, and the outer ring of the bearing is fixed inside the cylinder by an open retaining ring, which helps to improve the ease of installation and disassembly of the outer ring of the bearing and the positioning sleeve 211.

[0080] It is worth mentioning that you should continue to refer to Figure 7 The gear system testing equipment may further include a sliding plate 102 and an elastic structure 103. Both the sliding plate 102 and the elastic structure 103 are located between the positioning sleeve 211 and the first surface 24. The sliding plate 102 is exemplarily connected to the bottom of the positioning sleeve 211 by bolts. Along the Z direction, the side of the sliding plate 102 facing away from the positioning sleeve 211 is connected to the first surface 24 through the elastic structure 103. In this way, when the second mating part 8 abuts against the intermediate shaft 03, a rigid connection is avoided between the second mating part 8, the intermediate shaft 03, and the first mounting part 1, thereby improving the reliability of the equipment.

[0081] Additionally, please continue to refer to Figure 7 The gear system testing equipment may also include a guide post 104, which is disposed on the slide plate 102, and the first surface 24 of the support structure is provided with a guide hole, so as to pre-position the slide plate 102 during the connection process between the slide plate 102 and the support structure, and improve the installation accuracy and convenience of the slide plate 102.

[0082] It should be noted that the skateboard and elastic structure can also be set in the second mating part 8 according to actual needs, which will not be elaborated here.

[0083] In a specific embodiment, such as Figure 1As shown, the gear system also includes a first output end 05, a second driven gear 06, a third driven gear 07, and a second output end 08. An intermediate shaft 03 is inserted into the gear inner hole of the second driven gear 06. Along the axial direction of the third driven gear 07, the first output end 05 and the second output end 08 are arranged opposite to each other, and both the first output end 05 and the second output end 08 are connected to the third driven gear 07 for transmission. The second driven gear 06 is used to mesh with the third driven gear 07.

[0084] It should be noted that both the first output end 05 and the second output end 08 belong to the differential of the gearbox. The first output end 05 includes a first bevel gear, and the second output end 08 includes a second bevel gear. The differential also includes a third bevel gear and a fourth bevel gear. Along the axial direction of the third driven gear 07, the first and second bevel gears are positioned opposite each other, and along the radial direction of the third driven gear 07, the third and fourth bevel gears are positioned opposite each other. Both the third and fourth bevel gears are located between the first and second bevel gears and mesh with them respectively.

[0085] In addition, both the first output end 05 and the second output end 08 include bearing inner rings, and along the axial direction of the third driven gear 07, the bearing inner ring of the first output end 05 is disposed opposite to the gear inner hole of the first bevel gear, and the bearing inner ring of the second output end 08 is disposed opposite to the gear inner hole of the second bevel gear.

[0086] like Figure 2 As shown, the gear train testing equipment also includes a third mounting part 105 and a second displacement sensor ( Figure 2 (Not shown in the image) and a third angle encoder 107, along the radial direction of the first centering sleeve 21, the second mounting part 2 is located between the first mounting part 1 and the third mounting part 105, and the third mounting part 105 is configured to be opposite to the first output end 05.

[0087] refer to Figure 8 , Figure 8 for Figure 2 The provided partial schematic diagram of the gear train testing equipment is used to illustrate the structural schematic diagram of the third mounting part 105. The third mounting part 105 includes a second centering sleeve 1051, which is coaxially arranged with the first output end 05 and rotatably connected to the first output end 05. It should be noted that the structural form of the second centering sleeve 1051 can refer to the structural form of the first centering sleeve 21, and will not be described again here.

[0088] Furthermore, the method by which the third mounting portion 105 moves toward or away from the second mounting portion 2 along the radial direction of the second centering sleeve 1051 can be referenced to the method by which the first mounting portion 1 moves toward or away from the second mounting portion 2, and will not be described again here.

[0089] Using the gear system testing equipment provided in this application, during the movement of the first mounting part 1 and the third mounting part 105 radially toward the second mounting part 2 along the drive shaft 11, the first displacement sensor and the second displacement sensor can accurately obtain the moving distance of the input shaft 01 and the first output end 05, thereby obtaining the center distance between the input shaft 01 and the intermediate shaft 03, and the center distance between the first output end 05 and the central shaft. This can improve the installation accuracy of the input shaft 01, the intermediate shaft 03 and the first output end 05, while also improving the meshing accuracy of the driving gear 02 and the driven gear.

[0090] Furthermore, since the first angle encoder 4 is used to detect the rotation angle of the teeth of the driving gear 02, the second angle encoder 5 is used to detect the rotation angle of the teeth of the first driven gear 04 and the second driven gear 06, and the third angle encoder 107 is used to detect the rotation angle of the teeth of the third driven gear 07, the actual rotation angles of the teeth of the driving gear 02 and the driven gears can be obtained through the angle encoders during the rotation of the driving gear 02 and the driven gears. Then, by comparing the actual rotation angle of the teeth of the driving gear 02 with the theoretical rotation angle, and by comparing the actual rotation angles of each driven gear with the theoretical rotation angles, it can be determined whether the TE of the gear system meets the theoretical range.

[0091] In addition, the connection method between the second centering sleeve 1051 and the first output end 05 can be referred to the connection method between the first centering sleeve 21 and the intermediate shaft 03, which will not be repeated here.

[0092] It is worth mentioning that the gear system testing equipment also includes a third mounting bracket 106 and a third mating part 108. Along the axial direction of the second centering sleeve 1051, the third mating part 108 and the third mounting part 105 are arranged opposite to each other and are respectively mounted on the third mounting bracket 106. At the same time, the third mating part 108 and the third mounting part 105 are used to install the first output end 05.

[0093] Furthermore, the third mounting part 105 may also include a first loading shaft 1052, which passes through the bottom of the second centering sleeve 1051 along the axial direction of the second centering sleeve 1051. The first loading shaft 1052 is provided with a spline (external spline) on the side near the third mating part 108, and the first bevel gear of the first output end 05 is provided with an internal spline. The spline can be inserted into the internal spline to realize the synchronous rotation of the first loading shaft 1052 and the first bevel gear of the first output end 05.

[0094] It is understood that the first loading shaft 1052 can be connected to the third mounting bracket 106 via a seated bearing to achieve stable rotation of the first loading shaft 1052.

[0095] In addition, the third angle encoder 107 can be installed on the third mounting part 105 or the third mating part 108 as needed.

[0096] In one alternative embodiment, the third mating part 108 includes a third centering sleeve 1081 and a second loading shaft 1082. The third centering sleeve 1081 is coaxially arranged with the second output end 08, and the connection method between the third centering sleeve 1081 and the second output end 08 can refer to the connection method between the first centering sleeve 21 and the intermediate shaft 03, which will not be described again here.

[0097] The second output end 08 includes a second bevel gear, and the second loading shaft 1082 is a stepped shaft. The smaller diameter portion of the stepped shaft is closer to the third mounting portion 105 than the larger diameter portion, and the smaller diameter portion of the stepped shaft is provided with a spline to facilitate the connection between the second loading shaft 1082 and the internal spline of the second bevel gear at the second output end 08. Furthermore, the end face of the larger diameter portion of the stepped shaft is a tapered surface, which abuts against the end face of the gear hole of the second bevel gear, thereby further improving the coaxiality between the gear hole of the second bevel gear and the second loading shaft 1082.

[0098] It should be noted that the second loading axis 1082 can be fixed to the third mounting bracket 106 as needed.

[0099] In addition, the third mating part 108 can be provided with a sliding plate and elastic structure between the third centering sleeve 1081 and the third mounting bracket 106 according to actual needs, so as to avoid the third mating part 108 forming a rigid connection with the second output end 08 and the third mounting part 105, thereby improving the reliability of the equipment.

[0100] It is worth mentioning that the gear system testing equipment also includes a loading device 109 and a torque sensor, which are used to apply different loads to the first output terminal 05 and the second output terminal 08 according to the testing requirements, and to test the torque through the torque sensor, thereby improving the adaptability of the equipment.

[0101] It is understandable that, such as Figure 2 As shown, the third mounting bracket 106 of the gear system testing equipment provided in this application can be installed on the main mounting bracket 10, and the third mounting bracket 106 is slidably connected to the main mounting bracket 10 via a linear guide rail. Furthermore, the main mounting bracket 10 is also provided with adjusting feet 1001, which can be used to improve the overall stability of the equipment. In addition, the equipment's cables can be housed within the cable chain 1002, thus reducing the risk of cable damage.

[0102] In summary, by using the gear train testing equipment provided in this application, multiple movable mounting parts are set up to position the gear train. When testing the gear train, the transmission shaft of the gear train can be set in the corresponding mounting parts, and the movement distance of the mounting parts is located by sensors to realize the meshing of the driving gear and the driven gear. This can avoid the generation of TE caused by the installation error between the gear train and the housing, and is conducive to improving the accuracy of the inspection of the meshing degree of the driving gear O2 and the driven gear.

[0103] In addition, by connecting the angle encoder to the mounting part to detect the rotation angle of the drive shaft, the actual rotation angle of the drive gear 02 and the driven gear is obtained by the angle encoder during the rotation of the driven gear 02. The actual rotation angle of the driven gear is compared with the theoretical rotation angle, so as to effectively determine whether the transmission error of the gear system meets the theoretical range.

[0104] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A gear train testing device, the gear train comprising an input shaft, a driving gear, an intermediate shaft, and a first driven gear, wherein the input shaft is inserted into the inner bore of the driving gear, the intermediate shaft is inserted into the inner bore of the first driven gear, and the driving gear is used to mesh with the first driven gear; characterized in that, The gear train detection device includes a first mounting part, a second mounting part, a first displacement sensor, a first angle encoder, and a second angle encoder, wherein: The first mounting part includes a drive shaft, which is coaxially arranged with the input shaft; along the rotation direction of the drive shaft, the drive shaft is used to engage with the input shaft; The second mounting part includes a first centering sleeve, which is coaxially arranged with the intermediate shaft and rotatably connected to the intermediate shaft. Along the radial direction of the drive shaft, the first mounting portion moves toward or away from the second mounting portion; The first displacement sensor is connected to the first mounting part and is used to detect the moving distance of the first mounting part; the first angle encoder is connected to the first mounting part and is used to detect the rotation angle of the teeth of the drive gear. The second angle encoder is connected to the second mounting part and is used to detect the rotation angle of the teeth of the first driven gear.

2. The gear train testing equipment according to claim 1, characterized in that, The second mounting part further includes a first centering structure, which extends through the bottom surface of the first centering sleeve along the axial direction of the first centering sleeve; a portion of the first centering structure is located inside the first centering sleeve and is coaxial with the first centering sleeve. Along the axial direction of the first centering sleeve, the first centering structure is used to abut against the intermediate shaft.

3. The gear train testing equipment according to claim 1, wherein the gear train further includes a bearing inner ring, the bearing inner ring being sleeved on the intermediate shaft, characterized in that, The first centering sleeve includes a bearing outer ring, which is used to fit around the outer side of the bearing inner ring.

4. The gear train testing device according to claim 1, wherein along the axial direction of the input shaft, the input shaft includes a blind hole, and an internal spline is provided within the blind hole, characterized in that, The drive shaft has a spline on the side near the input shaft, and the spline is inserted into the internal spline.

5. The gear train testing equipment according to claim 4, characterized in that, The drive shaft includes a stepped shaft, with the smaller diameter portion of the stepped shaft closer to the input shaft than the larger diameter portion; and the smaller diameter portion of the stepped shaft is provided with a spline. The end face of the larger diameter portion of the stepped shaft is used to abut against the end face of the input shaft.

6. The gear train testing equipment according to claim 1, characterized in that, The gear train testing device further includes a first mating part, which is disposed opposite to the first mounting part along the axial direction of the drive shaft; and the input shaft is disposed between the first mating part and the first mounting part. Along the axial direction of the drive shaft, the first mating part moves toward or away from the first mounting part, and the first mating part is used to abut against the input shaft.

7. The gear train testing equipment according to claim 6, characterized in that, The first mating part further includes a second centering structure, which extends toward the first mounting part along the axial direction of the drive shaft; Along the axial direction of the drive shaft, the second centering structure is used to abut against the input shaft.

8. The gear train testing equipment according to claim 1, characterized in that, The gear train testing equipment further includes a second mating part, which is disposed opposite to the second mounting part along the axial direction of the first centering sleeve; and the intermediate shaft is disposed between the second mating part and the second mounting part. Along the axial direction of the first centering sleeve, the second mating part moves toward or away from the second mounting part, and the second mating part is used to abut against the intermediate shaft.

9. The gear train testing equipment according to claim 1, characterized in that, The second mounting part further includes a first surface along the axial direction of the first centering sleeve. The first surface is opposite to the intermediate shaft relative to the first centering sleeve, and the first centering sleeve is detachably mounted on the first surface.

10. The gear train testing equipment according to claim 9, characterized in that, The gear train testing equipment also includes an elastic structure located between the first centering sleeve and the first surface, and connected to the first centering sleeve and the first surface respectively.

11. The gear train testing device according to any one of claims 1-10, wherein the gear train further comprises a first output end, a second driven gear, and a third driven gear, the intermediate shaft is inserted into the gear inner hole of the second driven gear, and the first output end is drivingly connected to the third driven gear; the second driven gear is used to mesh with the third driven gear, characterized in that, The gear train detection device further includes a third mounting part, a second displacement sensor, and a third angle encoder. Along the radial direction of the first centering sleeve, the second mounting part is located between the first mounting part and the third mounting part, and the third mounting part is configured to be opposite to the first output end. The third mounting part includes a second centering sleeve, which is coaxially arranged with the first output end and rotatably connected to the first output end. Along the radial direction of the second centering sleeve, the third mounting portion moves toward or away from the second mounting portion; The second displacement sensor is connected to the third mounting part and is used to detect the movement distance of the third mounting part; The second angle encoder is used to detect the rotation angle of the teeth of the first driven gear and the teeth of the second driven gear; The third angle encoder is connected to the third mounting part and is used to detect the rotation angle of the teeth of the third driven gear.

12. The gear train detection device according to claim 11, wherein the gear train further includes a second output end along the axial direction of the third driven gear, the first output end and the second output end are disposed opposite to each other, and the second output end is drively connected to the third driven gear, characterized in that, The gear train testing equipment further includes a third mating part, which is arranged opposite to the third mounting part along the axial direction of the second centering sleeve; Along the axial direction of the second centering sleeve, the third mating part moves toward or away from the third mounting part and is used for rotatable connection with the second output end.

13. The gear train testing equipment according to claim 11, characterized in that, The gear train testing equipment also includes a loading device, which is used to apply different loads to the first output end and the second output end.

Images