Output shaft assembly for an electric pedal motor

Abstract

The utility model discloses an output shaft subassembly of electric pedal motor, including motor fixed shell, output protection shell, end cover, output shaft and drive assembly, output protection shell is fixed in motor fixed shell one end, and end cover is fixed in output protection shell one side, and output shaft rotation is connected at the center place of end cover, and drive assembly sets up in output protection shell. In the utility model, through the meshing linkage of worm drive worm wheel, further drive linkage gear linkage, and cooperate with the limit tooth groove and make linkage gear meshing rotation, simultaneously drive driven gear meshing rotation, and drive output shaft rotation through synchronous link, through linkage gear and driven gear combination constitutes planetary reduction mechanism, further big amplitude promotion motor's output torque, simultaneously keep transmission efficiency, avoid the problem of winding temperature rise of traditional direct drive scheme because of overload, and realize reverse self -locking through the spiral angle friction of worm and worm wheel, can prevent load reverse impact motor when power off.

Description

Technical Field

[0001] This utility model relates to a motor output shaft, specifically an output shaft assembly for an electric pedal motor, and belongs to the technical field of motor output shafts. Background Technology

[0002] To assist passengers in easily entering and exiting the vehicle, pedals are usually installed on the chassis. Pedals generally include fixed pedals and electric pedals. Electric pedals are popular among users because they can automatically extend when the door is opened to assist passengers in easily entering and exiting the vehicle, and automatically retract when the door is closed to ensure the vehicle's passability and aesthetics. However, existing electric pedals generally require a motor and its output shaft for drive.

[0003] Most existing motor output shafts have various problems. For example, in the automotive electric pedal motor shaft transmission mechanism disclosed in announcement number CN219601081U, although when the motor cannot control the pedal extension and retraction, the locking nut is turned outward and the transmission bushing is moved outward from the installation gap, and the transmission bushing and motor are removed in sequence, the active linkage mechanism can move freely, thereby allowing manual control of the pedal extension and retraction, in this technical solution and most current motor output shaft assemblies, the output shaft is generally coaxially connected to the motor rotor. When the motor directly drives the output shaft, it needs to meet both speed and torque requirements. However, since the rated torque of the motor is limited by magnetic field strength, current and heat loss, high torque output requires sacrificing volume efficiency or using expensive materials. Moreover, under impact load conditions, the motor needs to provide several times the rated torque instantaneously, leading to excessive winding temperature rise and the risk of permanent magnet demagnetization. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing an output shaft assembly for an electric pedal motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An output shaft assembly for an electric pedal motor includes a motor mounting housing, an output protective housing, an end cover, an output shaft, and a drive assembly. The output protective housing is fixed to one end of the motor mounting housing, the end cover is fixed to one side of the output protective housing, the output shaft is rotatably connected to the center of the end cover, and the drive assembly is disposed inside the output protective housing. The drive assembly includes a motor rotor, a worm, a worm wheel, and a transmission unit. The motor rotor is rotatably connected inside the motor housing. The worm is coaxially fixed to one end of the motor rotor. The worm wheel is rotatably connected inside the output protective housing, and the worm and worm wheel mesh with each other. The transmission unit is located on one side of the end cover.

[0006] As a further embodiment of this utility model: the transmission unit includes a linkage gear and a limiting tooth groove, the linkage gear is rotatably connected to the worm gear, the limiting tooth groove is disposed on the inner wall of the end cover, and the linkage gear meshes with the limiting tooth groove.

[0007] As a further embodiment of this utility model: the transmission unit further includes a driven gear and a synchronizing rod. The synchronizing rod is coaxially fixed on the output shaft near the end cover, and the synchronizing rod is rotatably connected to the output protective shell and the end cover. The driven gear is coaxially fixed on the synchronizing rod and meshes with the linkage gear.

[0008] As a further improvement of this utility model: at least three linkage gears are provided, and the included angle between the three linkage gears is 120 degrees, and the driven gear is located between the three linkage gears.

[0009] As a further embodiment of this utility model: an abutment block is provided inside the end cover, and a sealing disc is rotatably abutted on one side of the abutment block, and the sealing disc is rotatably connected to the output shaft.

[0010] As a further improvement of this utility model: a connecting rod is fixed on one side of the sealing disc, and a slot is provided at the center of the linkage gear shaft, into which the connecting rod is inserted.

[0011] The beneficial effects of this utility model are as follows: In this utility model, the worm gear drives the worm wheel to mesh and rotate, which in turn drives the linkage gear to rotate. With the help of the limiting tooth groove, the linkage gear meshes and rotates, while driving the driven gear to mesh and rotate. The output shaft is driven to rotate through the synchronizing rod. The combination of the linkage gear and the driven gear forms a planetary reduction mechanism, which greatly improves the output torque of the motor while maintaining the transmission efficiency. It avoids the winding temperature rise problem caused by overload in the traditional direct drive solution. Furthermore, the reverse self-locking is achieved through the helix angle friction of the worm and worm wheel, which can prevent the load from reversing and impacting the motor when the power is off. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the drive component structure of this utility model; Figure 3 This is a schematic diagram of the transmission unit structure of this utility model; Figure 4 This is a schematic diagram of the end cap structure of this utility model.

[0013] In the diagram: 1. Motor mounting housing, 2. Output protective housing, 3. End cover, 4. Output shaft, 5. Drive assembly, 51. Motor rotor, 52. Worm gear, 53. Worm wheel, 54. Linkage gear, 55. Limiting tooth groove, 56. Driven gear, 57. Synchronizing rod, 58. Sealing disc, 59. Connecting rod, 6. Abutting block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0015] like Figures 1 to 4 As shown, an output shaft assembly of an electric pedal motor includes a motor mounting housing 1, an output protective housing 2, an end cover 3, an output shaft 4, and a drive assembly 5. The output protective housing 2 is fixed to one end of the motor mounting housing 1, the end cover 3 is fixed to one side of the output protective housing 2, the output shaft 4 is rotatably connected to the center of the end cover 3, and the drive assembly 5 is disposed inside the output protective housing 2. The drive assembly 5 includes a motor rotor 51, a worm 52, a worm wheel 53, and a transmission unit. The motor rotor 51 is rotatably connected to the motor housing 1. The worm 52 is coaxially fixed to one end of the motor rotor 51. The worm wheel 53 is rotatably connected to the output protective housing 2, and the worm 52 and the worm wheel 53 mesh with each other. The transmission unit is located on one side of the end cover 3. The transmission unit includes a linkage gear 54 and a limiting tooth groove 55. The linkage gear 54 is rotatably connected to the worm gear 53. The limiting tooth groove 55 is provided on the inner wall of the end cover 3, and the linkage gear 54 meshes with the limiting tooth groove 55. The transmission unit also includes a driven gear 56 and a synchronizing rod 57. The synchronizing rod 57 is coaxially fixed on the output shaft 4 at one end near the end cover 3, and the synchronizing rod 57 is rotatably connected to the output protective shell 2 and the end cover 3. The driven gear 56 is coaxially fixed on the synchronizing rod 57 and meshes with the linkage gear 54.

[0016] In this invention, the worm gear 52 drives the worm wheel 53 to mesh and rotate, which in turn drives the linkage gear 54 to rotate. With the help of the limiting tooth groove 55, the linkage gear 54 meshes and rotates, while driving the driven gear 56 to mesh and rotate. The output shaft 4 is driven to rotate through the synchronizing rod 57. The combination of the linkage gear 54 and the driven gear 56 forms a planetary reduction mechanism, which greatly improves the output torque of the motor while maintaining transmission efficiency. It avoids the winding temperature rise problem caused by overload in traditional direct drive solutions. Furthermore, the reverse self-locking is achieved through the helix angle friction of the worm gear 52 and the worm wheel 53, which can prevent the load from reversing and impacting the motor when the power is off. Example 2

[0017] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes: At least three linkage gears 54 are provided, and the included angle between the three linkage gears 54 is 120 degrees. The driven gear 56 is located between the three linkage gears 54. The arrangement of multiple linkage gears 54 enables the driven gear 56 to be stably driven.

[0018] An abutment block 6 is provided inside the end cover 3. A sealing disc 58 is rotatably abutted on one side of the abutment block 6, and the sealing disc 58 is rotatably connected to the output shaft 4. The sealing disc 58 seals and isolates one end of the end cover 3 to prevent the leakage of lubricating grease inside the output protective shell 2.

[0019] A connecting rod 59 is fixed on one side of the sealing disc 58. A slot is provided at the shaft center of the linkage gear 54, and the connecting rod 59 is inserted into the slot. The stability of the linkage gear 54 during transmission is improved by the connecting rod 59.

[0020] When the motor output shaft is working, the motor rotor 51 inside the motor housing 1 rotates, which drives the worm 52 to rotate. The worm 52 drives the worm wheel 53 to mesh and rotate, which in turn drives the linkage gear 54. At this time, the linkage gear 54 rotates under the meshing action of the limiting tooth groove 55, which in turn drives the driven gear 56 to mesh and rotate, and drives the output shaft 4 to rotate through the synchronizing rod 57.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An output shaft assembly for an electric pedal motor, comprising a motor mounting housing (1), an output protective housing (2), an end cap (3), an output shaft (4), and a drive assembly (5), characterized in that, The output protective shell (2) is fixed to one end of the motor fixing shell (1), the end cover (3) is fixed to one side of the output protective shell (2), the output shaft (4) is rotatably connected to the center of the end cover (3), and the drive assembly (5) is set inside the output protective shell (2). The drive assembly (5) includes a motor rotor (51), a worm (52), a worm wheel (53), and a transmission unit. The motor rotor (51) is rotatably connected inside the motor housing (1). The worm (52) is coaxially fixed to one end of the motor rotor (51). The worm wheel (53) is rotatably connected inside the output protective housing (2), and the worm (52) and the worm wheel (53) mesh with each other. The transmission unit is located on one side of the end cover (3).

2. The output shaft assembly of an electric pedal motor according to claim 1, characterized in that: The transmission unit includes a linkage gear (54) and a limiting tooth groove (55). The linkage gear (54) is rotatably connected to the worm gear (53). The limiting tooth groove (55) is provided on the inner wall of the end cover (3), and the linkage gear (54) meshes with the limiting tooth groove (55).

3. The output shaft assembly of an electric pedal motor according to claim 2, characterized in that: The transmission unit also includes a driven gear (56) and a synchronizing rod (57). The synchronizing rod (57) is coaxially fixed on the output shaft (4) at one end near the end cover (3), and the synchronizing rod (57) is rotatably connected to the output protective shell (2) and the end cover (3). The driven gear (56) is coaxially fixed on the synchronizing rod (57) and meshes with the linkage gear (54).

4. The output shaft assembly of an electric pedal motor according to claim 3, characterized in that: At least three linkage gears (54) are provided, and the included angle between the three linkage gears (54) is 120 degrees. The driven gear (56) is located between the three linkage gears (54).

5. The output shaft assembly of an electric pedal motor according to claim 2, characterized in that: An abutment block (6) is provided inside the end cover (3). A sealing disc (58) is rotatably abutted on one side of the abutment block (6), and the sealing disc (58) is rotatably connected to the output shaft (4).

6. The output shaft assembly of an electric pedal motor according to claim 5, characterized in that: A connecting rod (59) is fixed on one side of the sealing disc (58), and a slot is provided at the shaft center of the linkage gear (54), and the connecting rod (59) is inserted into the slot.

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