Abs motor assembly

Abstract

The utility model belongs to mechanical drive technical field discloses ABS motor assembly, this ABS motor assembly includes motor, magnet protection ring, planetary gear box and eccentric shaft, magnet protection ring fixed cover is located in motor, magnet protection ring convex has protruding, planetary gear box includes casing and output frame, the casing is located in magnet protection ring and sets up on motor, the casing is opened with recess, protruding rivet connection is in recess. Magnet protection ring fastening in casing is realized through the mode of rivet, need not traditional screw, reduce the number of components, reduce assembly cost, promote assembly efficiency, and, the overall structure of planetary gear box and motor is more compact, adapts to miniaturization equipment demand. Output frame sets up in casing and is connected with the output end transmission of motor, eccentric shaft and output frame's connecting hole interference fit radial hug tightly, realizes torque rigid transmission, avoids idling slip, is suitable for high frequency braking of ABS system time's strong load demand.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to ABS motor assembly. Background Technology

[0002] Anti-lock braking system (ABS), a core component of active safety in modern automobiles, effectively prevents wheel lock-up by monitoring wheel speed in real time and dynamically adjusting brake hydraulic pressure, ensuring directional control capability during emergency braking. The connection performance between the gearbox and the eccentric shaft of the hydraulic unit is a crucial factor affecting the overall stability of the system.

[0003] Currently, the connection between the gearbox, the magnetic retaining ring, and the eccentric shaft in an ABS hydraulic unit has the following main technical defects: The magnetic retaining ring is assembled onto the gearbox with screws, which increases assembly costs and affects assembly efficiency. Furthermore, the eccentric shaft and the gearbox's output frame are connected via a screw-flange clamping connection. Torque transmission relies on the frictional force on the flange end face generated by the screw preload. Under frequent forward and reverse rotation conditions, the decay of the screw preload can cause relative sliding of the contact surfaces, leading to slippage.

[0004] Therefore, an ABS motor assembly is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide an ABS motor assembly that eliminates the need for traditional screws, reduces assembly costs, improves assembly efficiency, and enables rigid torque transmission through the connection hole between the eccentric shaft and the output frame, preventing slippage during idle rotation.

[0006] To address the aforementioned problems in the existing technology, this utility model adopts the following technical solution:

[0007] ABS motor assembly, including:

[0008] motor;

[0009] A magnetic protective ring is fixedly sleeved on the motor, and the magnetic protective ring has protrusions.

[0010] A planetary gearbox, comprising a housing and an output frame, wherein the housing is located within the protective magnet ring and mounted on the motor, the housing has a groove, and a protrusion is riveted into the groove, and the output frame is disposed within the housing and is drively connected to the output end of the motor;

[0011] An eccentric shaft, which is interference-fitted with the connection hole of the output frame.

[0012] Preferably, the housing has a protrusion, the magnetic ring is sleeved on the housing, the protrusion abuts against the magnetic ring, and the protrusion has a force applied to the magnetic ring to fix the magnetic ring relative to the housing.

[0013] Preferably, there are multiple bosses, which are spaced apart along the outer periphery of the housing.

[0014] Preferably, the eccentric shaft is provided with an external spline, the connecting hole of the output frame is provided with an internal spline, and the eccentric shaft and the output frame are connected by the mating spline of the external spline and the internal spline.

[0015] Preferably, the eccentric shaft has a first mating section and a second mating section, the first mating section is provided with the external spline, the inner wall of the connecting hole of the output frame has a first connecting section and a second connecting section, the first connecting section is provided with the internal spline, the first connecting section and the first mating section are splinedly connected, and the second connecting section and the second mating section are interference fit.

[0016] Preferably, the ABS motor assembly further includes a bearing, the eccentric shaft includes a shaft body and a bushing, the shaft body is interference-fitted with the connecting hole of the output frame, the bushing is fixedly sleeved on the shaft body, and the outer ring of the bushing is interference-fitted with the inner ring of the bearing.

[0017] Preferably, the bushing and the shaft body are integrally formed.

[0018] Preferably, the eccentric shaft and the output frame are integrally formed.

[0019] Preferably, the planetary gearbox further includes planetary gears, the housing includes an outer shell and a base, the base is disposed on the motor, there is a receiving cavity between the outer shell and the base, the planetary gears are located in the receiving cavity, and the planetary gears are disposed between the base and the output frame, the planetary gears are connected to the output end of the motor and the internal gear transmission of the outer shell.

[0020] Preferably, the ABS motor assembly further includes a first gasket and a second gasket. Along the axial direction of the planetary gear, the first gasket is disposed between the planetary gear and the output frame, and the second gasket is disposed between the planetary gear and the base.

[0021] The beneficial effects of this utility model are as follows:

[0022] The ABS motor assembly provided by this utility model features a magnetic retaining ring fixedly fitted onto the motor, with protrusions on the retaining ring. The planetary gearbox includes a housing and an output frame. The housing is located within the magnetic retaining ring and mounted on the motor. The housing has a groove, and the protrusions are press-fitted into the groove. The magnetic retaining ring is secured to the housing via press-fitting, eliminating the need for traditional screws, reducing the number of parts, lowering assembly costs, and improving assembly efficiency. Furthermore, the overall structure of the planetary gearbox and motor is more compact, adapting to the needs of miniaturized equipment. The output frame is located within the housing and is drively connected to the output end of the motor. The eccentric shaft is interference-fitted with the connection hole of the output frame. Radial clamping ensures rigid torque transmission and prevents slippage during idling. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the ABS motor assembly provided in an embodiment of the present invention;

[0024] Figure 2 A cross-sectional view of the ABS motor assembly provided in an embodiment of this utility model;

[0025] Figure 3 An exploded view of the ABS motor assembly provided in this embodiment of the utility model;

[0026] Figure 4 An exploded view of the output frame and shaft provided in an embodiment of this utility model.

[0027] Figure label:

[0028] 1. Motor;

[0029] 2. Magnetizing ring; 21. Raised surface;

[0030] 3. Planetary gearbox; 31. Housing; 311. Groove; 312. Boss; 313. Outer shell; 314. Base; 32. Output frame; 321. First connecting section; 322. Second connecting section; 33. Planetary gear;

[0031] 4. Eccentric shaft; 41. First mating section; 42. Second mating section; 43. Shaft body; 44. Bushing;

[0032] 5. External spline;

[0033] 6. Internal spline;

[0034] 7. Bearings;

[0035] 8. First gasket;

[0036] 9. Second gasket. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] like Figures 1-4 As shown, in this embodiment, the ABS motor assembly includes a motor 1, a magnetic ring 2, a planetary gearbox 3, and an eccentric shaft 4. The magnetic ring 2 is fixedly sleeved on the motor 1 and has a protrusion 21. The planetary gearbox 3 includes a housing 31 and an output frame 32. The housing 31 is located inside the magnetic ring 2 and mounted on the motor 1. The housing 31 has a groove 311, and the protrusion 21 is riveted into the groove 311. The output frame 32 is disposed inside the housing 31 and is connected to the output end of the motor 1. The eccentric shaft 4 is interference-fitted with the connection hole of the output frame 32.

[0042] For example, motor 1 includes motor 1 body, motor 1 output shaft, and motor 1 gear. The output end of motor 1 body is connected to motor 1 output shaft, and motor 1 gear is fixedly sleeved on motor 1 output shaft. When motor 1 body is started, motor 1 output shaft drives motor 1 gear to rotate.

[0043] The eccentric shaft 4 is made of metal and is manufactured by cold heading or powder metallurgy. It has high strength. The motor 1 of the ABS motor assembly is used as the drive source. The planetary gearbox 3 is used as the transmission mechanism. The motor 1 is connected to the eccentric shaft 4 through the planetary gearbox 3. The motor 1 transmits power to the planetary gearbox 3, and then the planetary gearbox 3 transmits power to the eccentric shaft 4, driving the eccentric shaft 4 to rotate.

[0044] The magnetic shielding ring 2 is welded to the motor 1. The magnetic shielding ring 2 has a magnetic shielding function, absorbing the leakage magnetic field of the motor 1 and reducing the outward diffusion of the magnetic field. The planetary gearbox 3 is fixed inside the magnetic shielding ring 2. One end of the magnetic shielding ring 2 has a protrusion 21, corresponding to a groove 311 on the housing 31 of the planetary gearbox 3. The protrusion 21 and the groove 311 cooperate; specifically, after aligning the protrusion 21 with the groove 311, the protrusion 21 is bent and pressed into the groove 311 for fixation. The magnetic shielding ring 2 provides support for the motor 1 and the housing 31. The magnetic shielding ring 2 is fastened to the housing 31 by riveting, eliminating the need for traditional screws, reducing the number of parts, lowering assembly costs, and improving assembly efficiency. Furthermore, the overall structure of the planetary gearbox 3 and the motor 1 is more compact, adapting to the needs of miniaturized equipment.

[0045] The output end of motor 1 is equipped with a planetary gear 33, which is located inside housing 31 and connected to output frame 32. Under the drive of motor 1, the planetary gear 33 drives output frame 32 to rotate, meaning the output end of motor 1 rotates synchronously with eccentric shaft 4. Eccentric shaft 4 is interference-fitted with the connecting hole of output frame 32. Eccentric shaft 4 is fixed in the connecting hole by hammering or other means, meaning the outer circumferential surface of eccentric shaft 4 is interference-fitted with the wall of the connecting hole. The interference fit between eccentric shaft 4 and connecting hole radially tightens the torque, achieving rigid torque transmission and preventing slippage, which is suitable for the high load requirements of ABS system high-frequency braking.

[0046] Optionally, the eccentric shaft 4 and the output frame 32 can be integrally formed by casting or other methods, reducing the connection structure, improving overall rigidity and coaxiality, and reducing transmission clearance. Furthermore, this reduces assembly steps and errors between the eccentric shaft 4 and the output frame 32, thereby improving the overall structural stability.

[0047] Furthermore, referring to Figures 1-3 The housing 31 has a protrusion 312, and the magnetic ring 2 is sleeved on the housing 31. The protrusion 312 abuts against the magnetic ring 2, and the protrusion 312 has a force applied to the magnetic ring 2, so that the magnetic ring 2 is relatively fixed to the housing 31.

[0048] It should be noted that the inner diameter of the magnetic protective ring 2 is slightly larger than the outer diameter of the housing 31, and the inner ring of the magnetic protective ring 2 surrounds the outer periphery of the housing 31. A boss 312 is integrally formed on the outer peripheral wall of the housing 31, and a protrusion 21 is sandwiched between the outer periphery of the housing 31 and the inner ring of the magnetic protective ring 2. Because the boss 312 has a certain height, the protrusion 21 applies a force to the magnetic protective ring 2, causing the magnetic protective ring 2 to be pushed outward relative to the housing 31, forming an interference fit, further improving the fixation of the magnetic protective ring 2 relative to the housing 31. In this embodiment, there are multiple bosses 312, spaced apart along the outer periphery of the housing 31. Multiple protrusions 21 simultaneously apply a force to the magnetic protective ring 2, and multiple bosses 312 abut against the magnetic protective ring 2, preventing the magnetic protective ring 2 from rotating relative to the housing 31 during operation.

[0049] Furthermore, referring to Figure 4 The eccentric shaft 4 is provided with an external spline 5, and the connecting hole of the output frame 32 is provided with an internal spline 6. The eccentric shaft 4 and the output frame 32 are connected by the mating spline of the external spline 5 and the internal spline 6.

[0050] The external spline 5 and the internal spline 6 can be non-standard involute splines, rectangular splines or special tooth profile splines, which can optimize the tooth root strength and contact area of ​​the splines, thereby improving the load-bearing capacity between the external spline 5 and the internal spline 6.

[0051] The spline fit between the eccentric shaft 4 and the output frame 32 includes an interference fit and a loose fit. The interference fit between the outer spline 5 and the inner spline 6 enables rigid torque transmission between the eccentric shaft 4 and the output frame 32 and reduces assembly costs. The loose fit between the outer spline 5 and the inner spline 6 allows for small radial displacement of the eccentric shaft 4 relative to the connection hole, thus balancing assembly errors and operating vibrations.

[0052] Furthermore, referring to Figures 2-3 The eccentric shaft 4 has a first mating section 41 and a second mating section 42. The first mating section 41 is provided with an external spline 5. The inner wall of the connecting hole of the output frame 32 has a first connecting section 321 and a second connecting section 322. The first connecting section 321 is provided with an internal spline 6. The first connecting section 321 and the first mating section 41 are splined together, and the second connecting section 322 and the second mating section 42 are interference-fitted.

[0053] The first connecting section 321 of the connecting hole is provided with an internal spline 6, and the first mating section 41 of the eccentric shaft 4 is provided with an external spline 5. The spline fit between the two includes an interference fit and a loose fit. The interference fit between the first connecting section 321 and the first mating section 41 achieves radial clamping, rigidly transmitting the main torque and preventing slippage. The loose fit, i.e., a clearance fit, compensates for assembly errors, reduces stress concentration caused by rigid connections, and has lower requirements for machining accuracy, thus reducing costs. The interference fit between the second connecting section 322 of the connecting hole and the first mating section 41 of the eccentric shaft 4 eliminates the need for complex positioning tools, ensuring a stable connection.

[0054] Furthermore, referring to Figures 2-3 The ABS motor assembly also includes a bearing 7, and an eccentric shaft 4 including a shaft body 43 and a bushing 44. The shaft body 43 is interference-fitted with the connecting hole of the output frame 32, and the bushing 44 is fixedly sleeved on the shaft body 43, and the outer ring of the bushing 44 is interference-fitted with the inner ring of the bearing 7.

[0055] The bushing 44 is sandwiched between the shaft body 43 and the bearing 7. The bearing 7 is mounted on the shaft body 43 through the bushing 44. That is, the eccentric shaft 4 has a split structure, which reduces the production cost of the parts. Optionally, the shaft body 43 and the bushing 44 are integrally formed, that is, the eccentric shaft 4 is an integral structure, which can improve the strength and stability of the parts.

[0056] Furthermore, referring to Figures 2-3 The planetary gearbox 3 also includes planetary gears 33. The housing 31 includes an outer shell 313 and a base 314. The base 314 is disposed on the motor. There is a receiving cavity between the outer shell 313 and the base 314. The planetary gears 33 are located in the receiving cavity and are disposed between the base 314 and the output frame 32. The planetary gears 33 are connected to the output end of the motor 1 and the internal gear transmission of the outer shell 313.

[0057] When motor 1 starts, the output shaft of motor 1 rotates and drives the gear of motor 1 to rotate synchronously. The gear of motor 1 meshes with the planetary gear 33. At the same time, the planetary gear 33 meshes with the internal teeth of the housing 313, thereby driving the planetary gear 33 to rotate on its own axis and make circular motion around the output end of motor 1. This causes the output frame 32 to rotate relative to the housing 313. The output frame 32 drives the eccentric shaft 4 to rotate, thereby transmitting the power.

[0058] Furthermore, referring to Figures 2-3 The ABS motor assembly also includes a first gasket 8 and a second gasket 9. Along the axial direction of the planetary gear 33, the first gasket 8 is disposed between the planetary gear 33 and the output frame 32, and the second gasket 9 is disposed between the planetary gear 33 and the base 314.

[0059] Both the first shim 8 and the second shim 9 are made of metal. The first shim 8 is used to limit the displacement of the gear of motor 1 along its axial direction and prevent axial movement. The second shim 9 converts the friction between the planetary gear 33 and the output frame 32 into friction between metals, reducing the wear between the planetary gear 33 and the output frame 32, thereby extending the service life of the planetary gearbox 3.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An ABS motor assembly, characterized in that, include: Motor (1); A magnetic ring (2) is fixedly sleeved on the motor (1), and the magnetic ring (2) has a protrusion (21). Planetary gearbox (3), the planetary gearbox (3) includes a housing (31) and an output frame (32). The housing (31) is located inside the magnetic ring (2) and is mounted on the motor (1). The housing (31) has a groove (311). The protrusion (21) is riveted to the groove (311). The output frame (32) is mounted inside the housing (31) and is connected to the output end of the motor (1) in a transmission connection. An eccentric shaft (4) is provided, and the eccentric shaft (4) is interference-fitted with the connecting hole of the output frame (32).

2. The ABS motor assembly according to claim 1, characterized in that, The housing (31) has a protrusion (312) and the magnetic ring (2) is sleeved on the housing (31). The protrusion (312) abuts against the magnetic ring (2) and the protrusion (312) has a force applied to the magnetic ring (2) to fix the magnetic ring (2) relative to the housing (31).

3. The ABS motor assembly according to claim 2, characterized in that, There are multiple bosses (312), and multiple bosses (312) are spaced apart along the outer periphery of the housing (31).

4. The ABS motor assembly according to claim 1, characterized in that, The eccentric shaft (4) is provided with an external spline (5), and the connecting hole of the output frame (32) is provided with an internal spline (6). The eccentric shaft (4) and the output frame (32) are connected by the mating spline of the external spline (5) and the internal spline (6).

5. The ABS motor assembly according to claim 4, characterized in that, The eccentric shaft (4) has a first mating section (41) and a second mating section (42). The first mating section (41) is provided with the external spline (5). The inner wall of the connecting hole of the output frame (32) has a first connecting section (321) and a second connecting section (322). The first connecting section (321) is provided with the internal spline (6). The first connecting section (321) and the first mating section (41) are splined together, and the second connecting section (322) and the second mating section (42) are interference fit.

6. The ABS motor assembly according to claim 1, characterized in that, The ABS motor assembly also includes a bearing (7), the eccentric shaft (4) includes a shaft body (43) and a bushing (44), the shaft body (43) is interference-fitted with the connecting hole of the output frame (32), the bushing (44) is fixedly sleeved on the shaft body (43), and the outer ring of the bushing (44) is interference-fitted with the inner ring of the bearing (7).

7. The ABS motor assembly according to claim 6, characterized in that, The bushing (44) and the shaft (43) are integrally formed.

8. The ABS motor assembly according to claim 1, characterized in that, The eccentric shaft (4) and the output frame (32) are integrally formed.

9. The ABS motor assembly according to claim 1, characterized in that, The planetary gearbox (3) further includes planetary gears (33). The housing (31) includes an outer shell (313) and a base (314). The base (314) is disposed on the motor. There is a receiving cavity between the outer shell (313) and the base (314). The planetary gears (33) are located in the receiving cavity and are disposed between the base (314) and the output frame (32). The planetary gears (33) are connected to the output end of the motor (1) and the internal gear of the outer shell (313) via a gear transmission.

10. The ABS motor assembly according to claim 9, characterized in that, The ABS motor assembly also includes a first gasket (8) and a second gasket (9). Along the axial direction of the planetary gear (33), the first gasket (8) is disposed between the planetary gear (33) and the output frame (32), and the second gasket (9) is disposed between the planetary gear (33) and the base (314).

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