Bearing seat for flexible butt joint transmission

Abstract

The utility model discloses a bearing seat for flexible butt joint transmission, which comprises a supporting assembly, a bearing seat and a driving assembly, wherein the supporting assembly forms a supporting cavity; the transmission assembly rotates around the axis of the supporting cavity, the transmission assembly is sequentially provided with a driving shaft, a single-elastic-sheet coupler and a crowned tooth coupler which are coaxial in the power transmission direction, the driving shaft drives the single-elastic-sheet coupler to rotate, and the single-elastic-sheet coupler can drive the crowned tooth coupler to rotate. According to the utility model, the axial, radial and angular deviations of the driving shaft and the speed reducer input shaft are primarily compensated by arranging the single-elastic-sheet coupling, and the deviations of the two shafts are secondarily compensated by arranging the crowned tooth coupling, so that the elastic deformation of the elastic sheets is reduced, and the heat produced by the elastic sheets is reduced; according to the crowned tooth coupling, the crowned teeth are meshed with the standard straight teeth, under the condition that transmission stability is guaranteed, deviation compensation of the two shafts is improved, the requirement for coaxiality is lowered, and meanwhile the transmission efficiency and stability between the driving shaft and the input shaft of the speed reducer are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor transmission for new energy vehicles, and in particular to a bearing seat for flexible docking transmission. Background Art

[0002] The process of a motor-driven reducer in a new energy vehicle's powertrain involves energy conversion, power transmission, and speed and torque regulation. The basic steps are as follows: electrical energy is converted into mechanical energy for the motor, which outputs torque; the motor's output shaft transmits high-speed, low-torque output to the reducer's input shaft; the reducer achieves both speed reduction and torque multiplication through gear transmission, outputting low-speed, high-torque output. The coaxiality between the motor's output shaft and the reducer's input shaft affects power transmission efficiency. High coaxiality results in high power transmission efficiency and minimal power loss, but requires high machining precision for the motor and reducer, resulting in high manufacturing costs and strict requirements for the powertrain's operating environment. Low coaxiality results in low power transmission efficiency, increased wear on the motor and reducer, and significant heat generation, shortening the powertrain's service life.

[0003] At present, the existing Chinese patent with publication number CN221033862U discloses an engine transmission shaft structure, including a bearing seat, and a flange assembly, a diaphragm coupling, a expansion sleeve, a shaft retaining ring and a bearing end cover are arranged on the surface of one end of the bearing seat from left to right. A spline shaft is arranged on the inner side of the other end surface of the bearing seat, a spline sleeve is arranged on the end surface of the spline shaft, and an elastic coupling flange and a high-elasticity coupling are arranged on one side surface of the spline sleeve. By connecting the engine and the dynamometer, it plays the role of transmitting speed and torque and compensating for centering offset.

[0004] However, when implementing the existing embodiments, the inventors found that the diaphragm coupling connects two half-couplings through multiple groups of metal diaphragms, and compensates for the relative displacement between the motor output shaft and the reducer input shaft through the elastic deformation of the diaphragm. During the rotation of the two shafts, the elastic deformation position of the diaphragm changes accordingly, causing the diaphragm to generate heat due to elastic deformation, resulting in local temperature rise, affecting its elastic deformation effect, and reducing its centering compensation stability. In order to reduce the degree of elastic deformation of the diaphragm coupling in the process of the motor output shaft driving the reducer input shaft, the inventors improved the flexible connection method of the bearing seat. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a bearing seat for flexible docking transmission. The specific technical solution is as follows:

[0006] A bearing seat for flexible docking transmission includes: a support assembly that forms a support cavity; and a transmission assembly that rotates around the axis of the support cavity. The transmission assembly is provided with a coaxial driving shaft, a single spring coupling and a drum gear coupling in sequence along the direction of power transmission. The driving shaft can drive the single spring coupling to rotate, and the single spring coupling can drive the drum gear coupling to rotate.

[0007] Furthermore, the drum-shaped tooth coupling includes: an external gear sleeve connected to the single-piece coupling, the radial cross-section of the drum-shaped teeth of the external gear sleeve is drum-shaped, and the tooth thickness of the drum-shaped teeth from the tooth surface to the tooth end increases from small to large and then to small; and an internal gear sleeve meshing with the drum-shaped teeth of the external gear sleeve, and the internal gear sleeve adopts a standard involute spur tooth internal gear design.

[0008] Preferably, the transmission assembly also includes: a spline sleeve connected to the output end of the driving shaft, the axis of the spline sleeve coincides with the axis of the driving shaft, and the inner surface of the spline sleeve forms an internal spline; and a driven shaft connected to the single spring coupling at one end, the driven shaft and the spline sleeve are connected through a spline, the driven shaft and the spline sleeve are coaxial, and the driving shaft drives the driven shaft to rotate through the spline.

[0009] Preferably, the transmission assembly also includes: a limit plate arranged on the axial end face of the driven shaft close to the driving shaft, the diameter of the limit plate is larger than the diameter of the driven shaft, the diameter of the limit plate is also larger than the diameter of the spline sleeve, and the limit plate can move along the axis of the driving shaft; and an elastic member arranged on the axial end face of the limit plate, when the driven shaft approaches the driving shaft along the length direction of the spline sleeve, the limit plate compresses the elastic member, and the elastic member can push the driven shaft away from the driving shaft.

[0010] Preferably, the support assembly includes: a shell, a driving shaft is placed inside the shell; and a bearing member arranged inside the shell, the axial inner surface of the bearing member can rotate relative to the shell, the axis of the bearing member coincides with the axis of the driving shaft, and the axial inner surface of the bearing member coincides with the axial outer surface of the driving shaft.

[0011] Preferably, it also includes a detection component, which includes: an induction ring connected to the single-elastic coupling, the diameter of the induction ring is larger than the diameter of the single-elastic coupling, and the induction ring moves synchronously with the driven shaft; and a proximity switch connected to the driving shaft through a sensor bracket, and the proximity switch can determine the positional relationship between the induction ring and the driving shaft.

[0012] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0013] The utility model preliminarily compensates for the axial, radial and angular deviations of the driving shaft and the reducer input shaft by arranging a single spring-plate coupling, and secondly arranges a drum-shaped tooth coupling to perform secondary compensation for the deviations of the two shafts, thereby reducing the elastic deformation of the springs of the single spring-plate coupling and reducing its heat generation. The drum-shaped tooth coupling improves the compensation for the deviations of the two shafts while ensuring transmission stability through the engagement of the drum-shaped teeth with the standard straight teeth, thereby reducing the requirements for coaxiality while ensuring the service life of the coupling, and improving the transmission efficiency and stability between the driving shaft and the reducer input shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;

[0015] Figure 2 for Figure 1 Partial cross-sectional view.

[0016] In the figure: 1. Support assembly; 2. Transmission assembly; 3. Detection assembly; 11. Housing; 12. Bearing; 13. Oil nozzle; 21. Driving shaft; 22. Spline sleeve; 23. Driven shaft; 24. Elastic member; 25. Limit plate; 26. Single spring coupling; 27. Drum gear coupling; 271. External gear sleeve; 272. Internal gear sleeve; 31. Sensor bracket; 32. Proximity switch; 33. Induction ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0019] like Figure 1As shown, an embodiment of the utility model includes: a support assembly 1, which forms a support cavity; and a transmission assembly 2 that rotates around the axis of the support cavity, and the transmission assembly 2 is provided with a coaxial driving shaft 21, a single elastic leaf coupling 26 and a drum gear coupling 27 in sequence along the direction of power transmission. The driving shaft 21 can drive the single elastic leaf coupling 26 to rotate, and the single elastic leaf coupling 26 can drive the drum gear coupling 27 to rotate.

[0020] Specifically, the axial area of ​​the support assembly 1 forms a support cavity, and there is a gap between the support cavity and the axial surface of the transmission assembly 2, so that the driving shaft 21 rotating around the axis of the support assembly 1 is unobstructed during the rotation process. Secondly, the driving shaft 21 passes through both ends of the support assembly 1, the left end is connected to the motor, and the right end is its output end. The right end is fixedly connected to the single-elastic coupling 26, thereby driving it to rotate. The right side coupling of the single-elastic coupling 26 is connected to the drum gear coupling 27 by bolts, so that it can drive the drum gear coupling 27 to rotate. The right end of the drum gear coupling 27 is its output end, which is connected to the reducer input shaft or the motor output port through a spline (not shown in the figure). The power transmission route of the transmission assembly 2 is from the driving shaft 21 to the single-elastic coupling 26, then to the drum gear coupling 27, and finally to the reducer, wherein the single-elastic coupling 26 and the drum gear coupling 27 are used to compensate for the centering error of the axis of the driving shaft 21 and the reducer input shaft.

[0021] Among them, the single spring-plate coupling 26 compensates for the displacement of the driving shaft 21 relative to the reducer input shaft during rotation through elastic deformation; the drum-shaped tooth coupling 27 can compensate for the angular displacement, axial displacement and radial displacement between the driving shaft 21 and the reducer input shaft. Its compensation ability mainly comes from the design of the drum-shaped teeth. The tooth surface of the drum-shaped teeth is arc-shaped. When there is a position deviation between the axes of the driving shaft 21 and the reducer input shaft, the springs in the single spring-plate coupling 26 will undergo elastic deformation for centering compensation. At this time, the arc-shaped structure of the drum-shaped teeth allows the tooth surface to slide slightly, thereby compensating for the relative displacement between the two shafts, thereby reducing the deformation degree of the springs of the single spring-plate coupling 26, thereby ensuring the transmission efficiency between the driving shaft 21 and the reducer input shaft, reducing the heat generation of the springs, thereby improving the service life of the single spring-plate coupling 26.

[0022] Secondly, the design of the drum-shaped tooth surface makes the contact between the inner and outer teeth more uniform, thereby reducing stress concentration, improving load-bearing capacity, reducing tooth surface wear, improving transmission efficiency, and extending service life.

[0023] like Figure 2As shown, the support assembly 1 includes: a shell 11, in which a driving shaft 21 is placed; a bearing member 12 is arranged inside the shell 11, and the axial inner surface of the bearing member 12 can rotate relative to the shell 11, the axis of the bearing member 12 coincides with the axis of the driving shaft 21, and the axial inner surface of the bearing member 12 coincides with the axial outer surface of the driving shaft 21.

[0024] Specifically, the shell 11 forms a supporting cavity, the axis of the shell 11 is the axis of the driving shaft 21, and the axis of the shell 11 is also the axis of the bearing member 12, so that when the driving shaft 21 and the bearing member 12 are tightly matched and fixedly connected, the driving shaft 21 can rotate around the axis of the bearing member 12, thereby reducing vibration during rotation, wherein the bearing member 12 at the left end of the driving shaft 21 is a straight groove ball bearing, which is used to bear the radial load of the driving shaft 21, and the bearing member 12 at the right end of the driving shaft 21 is an angular contact ball bearing placed back to back, which increases the axial load of the driving shaft 21 during rotation, thereby maintaining the stability of the driving shaft 21 during rotation, thereby improving the stability of the power output of the reducer; secondly, the shell 11 and the bearing member 12 are connected by a bolt to the oil nozzle 13, which can inject lubricating oil into the bearing member 12 for lubrication.

[0025] It is known from common sense that the drum-shaped tooth coupling 27 includes: an external gear sleeve 271 connected to the single-leaf coupling 26, the radial cross-section of the drum-shaped teeth of the external gear sleeve 271 is drum-shaped, and the tooth thickness of the drum-shaped teeth from the tooth surface to the tooth end increases from small to large and then to small; and an internal gear sleeve 272 meshing with the drum-shaped teeth of the external gear sleeve 271, and the internal gear sleeve 272 adopts a standard involute spur internal gear design.

[0026] Specifically, the tooth shape of the outer gear sleeve 271 is a drum-shaped tooth, which gradually becomes thinner at the tooth end, so that the tooth side clearance is large. When there is radial displacement, the drum-shaped design of the drum tooth enables the contact point between the inner and outer teeth to move along the tooth surface, so that the inner and outer teeth can move freely in the radial direction, thereby compensating for radial deviation; when there is axial displacement, the outer gear sleeve 271 and the inner gear sleeve 272 are splined, and the outer gear sleeve 271 can move in the axial direction, thereby compensating for axial deviation; when there is angular displacement, the drum shape of the drum tooth allows the contact point between the inner and outer teeth to change along the tooth width direction, so that the contact line between the inner and outer teeth can smoothly transition with the change of angular displacement, thereby effectively compensating for angular deviation.

[0027] Secondly, the tooth profile of the internal gear sleeve 272 adopts an involute, which meshes with the external gear sleeve 271, so that the transmission ratio of the internal and external teeth is constant; the contact points of the involute tooth surface can always maintain rolling contact when the gear moves, with low friction loss, which can effectively reduce transmission noise and energy loss, while improving transmission efficiency; the involute tooth surface has many contact points, which can evenly share the load, reduce the contact stress on the gear surface, improve the load-bearing capacity of the gear, and improve the load-bearing capacity of the coupling.

[0028] In the process of the driving shaft 21 transmitting power to the reducer input shaft, the deviation between the two shafts is further compensated by the elastic deformation of the spring of the single spring coupling 26 and the drum gear coupling 27, so that this embodiment can reduce the heat generation of the two couplings while ensuring the transmission efficiency, thereby improving the service life of the two couplings and the stability during the transmission process.

[0029] Secondly, the right end of the inner gear sleeve 272 is connected to the reducer output port or the motor output port through a spline. Different inner gear sleeves 272 products with different spline parameters can be selected according to different products, so that one device can be compatible with multiple different products. Among them, the inner gear sleeve 272 will be connected to the product first through manual or other equipment, and then the outer gear sleeve 271 will be automatically connected to the inner gear sleeve 272.

[0030] Furthermore, the transmission assembly 2 also includes: a spline sleeve 22 connected to the output end of the driving shaft 21, the axis of the spline sleeve 22 coincides with the axis of the driving shaft 21, and the inner surface of the spline sleeve 22 forms an internal spline; and a driven shaft 23 connected to the single spring coupling 26 at one end, the driven shaft 23 and the spline sleeve 22 are spline-connected, the driven shaft 23 is coaxial with the spline sleeve 22, and the driving shaft 21 drives the driven shaft 23 to rotate through the spline.

[0031] Specifically, a cylindrical groove is formed at the output end of the driving shaft 21 for embedding the spline sleeve 22, thereby reducing the overall length of the transmission assembly 2. The spline sleeve 22 is connected to the output end face of the driving shaft 21 by bolts, so that the driving shaft 21 can drive the spline sleeve 22 to rotate, thereby driving the internal spline of the spline sleeve 22 to rotate, thereby driving the driven shaft 23 connected to its spline, and thereby driving the single-spring coupling 26 fastened to the driven shaft 23 to rotate; wherein the axial outer surface of the driven shaft 23 forms a plurality of axially arranged keys, which match the internal spline, so that the driven shaft 23 can evenly distribute the torque, reduce the eccentricity caused by excessive force on a single key, and make the spline transmission have good concentricity, which can reduce the radial deviation of the driving shaft 21 and the reducer input shaft, thereby improving the transmission efficiency.

[0032] Furthermore, the transmission assembly 2 also includes: a limit plate 25 arranged on the axial end face of the driven shaft 23 close to the driving shaft 21, the diameter of the limit plate 25 is larger than the diameter of the driven shaft 23, the diameter of the limit plate 25 is larger than the diameter of the spline sleeve 22, and the limit plate 25 can move along the axis of the driving shaft 21; and an elastic member 24 arranged on the axial end face of the limit plate 25, when the driven shaft 23 approaches the driving shaft 21 along the length direction of the spline sleeve 22, the limit plate 25 compresses the elastic member 24, and the elastic member 24 can push the driven shaft 23 away from the driving shaft 21.

[0033] Specifically, the outer surface of the limit plate 25 slides along the inner surface of the cylindrical groove. The limit plate 25 is connected to the left end face of the driven shaft 23 by a bolt. Its diameter is the axial diameter of the spline sleeve 22, which is equal to the inner diameter of the cylindrical groove. Secondly, the elastic member 24 is a compression spring, one end of which is connected to the bottom surface of the cylindrical groove of the driving shaft 21, and the other end is connected to the left end face of the driven shaft 23. When the driven shaft 23 is subjected to axial pressure, the driven shaft 23 moves to the left relative to the driving shaft 21, thereby limiting The positioning plate 25 moves to the left relative to the driving shaft 21, and then the limiting plate 25 compresses the elastic member 24; when the axial pressure of the driven shaft 23 disappears, the compressed elastic member 24 pushes the limiting plate 25 and then pushes the driven shaft 23 to move to the right relative to the driving shaft 21, wherein the limiting plate 25 is limited by the spline sleeve 22 fixed to the driving shaft 21, and then the driven shaft 23 is limited by the limiting plate 25 in the distance it moves to the right, so that the driven shaft 23 can change its position relative to the driving shaft 21 according to the axial pressure it receives.

[0034] like Figure 1 As shown, the embodiment further includes a detection component 3, which includes: an induction ring 33 connected to the single-elastic coupling 26, the diameter of the induction ring 33 is larger than the diameter of the single-elastic coupling 26, and the induction ring 33 moves synchronously with the driven shaft 23; and a proximity switch 32 connected to the driving shaft 21 through a sensor bracket 31, and the proximity switch 32 can determine the positional relationship between the induction ring 33 and the driving shaft 21.

[0035] Specifically, the induction ring 33 is arranged on the axial outer side of the driven shaft 23 and is fixedly connected to the single-elastic coupling 26. The single-elastic coupling 26 is coaxial with the driven shaft 23 and can limit the induction ring 33 between the two, so that the proximity switch 32 can detect the induction ring 33 at all angles of the single-elastic coupling 26. When the driven shaft 23 is subjected to axial pressure and approaches the driving shaft 21, the induction ring 33 is also close to the driving shaft 21. The proximity switch 32 cannot detect the induction ring 33, and the driving shaft 21 rotates. This changes the angle of the external spline of the external gear sleeve 271 of the drum gear coupling 27 relative to the internal spline of the internal gear sleeve 272, so that the external gear sleeve 271 is embedded in the internal gear sleeve 272 to form a spline connection to transmit power. At this time, the axial direction of the driven shaft 23 is not subject to pressure but is subject to the elastic force of the elastic member 24. The elastic member 24 pushes the driven shaft 23 away from the driving shaft 21. The proximity switch 32 detects the induction ring 33, the driving shaft 21 starts to rotate, and then drives the reducer input shaft to rotate, realizing the automatic alignment function of the drum gear coupling 27.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0037] The technology, shape and structure that are not described in detail in this utility model are all well-known technologies.

Claims

1. A bearing seat for flexible docking transmission, characterized in that: include: A support assembly (1), the support assembly (1) forming a support cavity; as well as A transmission assembly (2) rotates around the axis of the supporting cavity, wherein the transmission assembly (2) is provided with a coaxial driving shaft (21), a single elastic leaf coupling (26), and a drum-shaped tooth coupling (27) in sequence along the direction of power transmission; the driving shaft (21) can drive the single elastic leaf coupling (26) to rotate, and the single elastic leaf coupling (26) can drive the drum-shaped tooth coupling (27) to rotate.

2. The bearing seat according to claim 1, characterized in that: The drum-shaped gear coupling (27) comprises: an outer gear sleeve (271) connected to the single-elastic coupling (26); the radial cross-section of the drum-shaped teeth of the outer gear sleeve (271) is drum-shaped; the tooth thickness of the drum-shaped teeth from the tooth surface to the tooth end increases from small to large and then to small; and An internal gear sleeve (272) meshes with the drum-shaped teeth of the external gear sleeve (271), wherein the internal gear sleeve (272) adopts a standard involute spur gear internal gear design.

3. The bearing seat according to claim 2, characterized in that: The transmission assembly (2) further comprises: a spline sleeve (22) connected to the output end of the driving shaft (21), wherein the axis of the spline sleeve (22) coincides with the axis of the driving shaft (21), and the inner surface of the spline sleeve (22) forms an internal spline; and A driven shaft (23) having one end connected to the single elastic coupling (26) is connected to the spline sleeve (22) via a spline. The driven shaft (23) and the spline sleeve (22) are coaxial, and the driving shaft (21) drives the driven shaft (23) to rotate via the spline.

4. The bearing seat according to claim 3, characterized in that: The transmission assembly (2) further comprises: a limit plate (25) provided on the axial end face of the driven shaft (23) close to the driving shaft (21), the diameter of the limit plate (25) being larger than the diameter of the driven shaft (23), the diameter of the limit plate (25) also being larger than the diameter of the spline sleeve (22), and the limit plate (25) being capable of moving along the axis of the driving shaft (21); and An elastic member (24) is arranged on the axial end surface of the limiting plate (25). When the driven shaft (23) approaches the driving shaft (21) along the length direction of the spline sleeve (22), the limiting plate (25) compresses the elastic member (24), and the elastic member (24) can push the driven shaft (23) away from the driving shaft (21).

5. The bearing seat according to claim 1, characterized in that: The support assembly (1) comprises: a housing (11), wherein the driving shaft (21) is placed inside the housing (11); and A bearing member (12) is arranged inside the housing (11), and the axial inner surface of the bearing member (12) is rotatable relative to the housing (11), the axis of the bearing member (12) coincides with the axis of the driving shaft (21), and the axial inner surface of the bearing member (12) coincides with the axial outer surface of the driving shaft (21).

6. The bearing seat according to claim 3, characterized in that: Also included is a detection component (3), which includes: an induction ring (33) connected to the single-elastic coupling (26), wherein the diameter of the induction ring (33) is larger than the diameter of the single-elastic coupling (26), and the induction ring (33) moves synchronously with the driven shaft (23); and A proximity switch (32) connected to the driving shaft (21) via a sensor bracket (31) is capable of determining the positional relationship between the induction ring (33) and the driving shaft (21).

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