Gear motor for automobile pedal

Abstract

A speed reducing motor for an automobile pedal comprises a motor body and a speed reducing box in transmission connection with the motor body, the speed reducing box comprises a box body, and an input cavity, a speed reducing cavity and an output cavity which are communicated in sequence and are perpendicular to one another in axis are formed in the box body; the box body is provided with an input port on one side of the input cavity, and a flange cover is integrally formed on the outer side of the input port; a middle worm and a middle bevel gear arranged on the middle worm in a sleeving mode are arranged in the speed reduction cavity. An output shaft and an output bevel gear which is arranged on the output shaft in a sleeving mode and meshed with the middle worm are arranged in the output cavity, output ports are formed in the positions, at the two ends of the output cavity, of the box body, and the two ends of the output shaft penetrate through the output ports and extend to the outer side. The motor body comprises a machine shell, a stator, a rotor and a motor shaft, the machine shell is installed on the flange cover, the end portion of the motor shaft penetrates through the input port, extends into the input cavity and is in transmission connection with the middle bevel gear, and a Hall controller is arranged in the flange cover; the utility model has the advantages of compact structure, large torque, reliable self-locking, integrated control and the like.

Description

Technical Field

[0001] This utility model relates to a geared motor, and more particularly to a geared motor for automotive pedals. Background Technology

[0002] SUVs and off-road vehicles have high ground clearance, and to facilitate passenger entry and exit, they are often equipped with electrically retractable side steps. These steps automatically extend when the door is opened for passengers to step on, and automatically retract under the vehicle after the door is closed to avoid affecting the vehicle's ground clearance. The actuators driving these steps need to meet a series of special requirements: 1. Sufficient output torque to smoothly drive the loaded step mechanism; 2. Compact structure to fit into the limited installation space under the vehicle chassis; 3. Synchronous drive of both side steps; 4. Reliable self-locking capability; 5. Precise motor control.

[0003] Therefore, there is an urgent need in the field for a highly integrated, compact, high-torque-output, reliable self-locking motor with an integrated intelligent control unit, specifically designed for electric retractable pedals in vehicles. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a geared motor for automotive pedals that is compact in structure, has high torque, reliable self-locking, and integrated control.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a geared motor for automobile pedals, including a motor body and a gearbox connected to it for transmission. The gearbox includes a housing, and the housing has an input cavity, a reduction cavity, and an output cavity that are sequentially connected and perpendicular to each other. The housing has an input port on one side of the input cavity and a flange cover integrally formed on its outer side. The reduction cavity has an intermediate worm and an intermediate helical gear sleeved on the intermediate worm. The output cavity has an output shaft and an output helical gear sleeved on the output shaft and meshing with the intermediate worm. The housing has output ports at both ends of the output cavity, and the two ends of the output shaft extend to the outside through the output ports. The motor body includes a housing, a stator, a rotor, and a motor shaft. The housing is mounted on the flange cover. The end of the motor shaft passes through the input port and extends into the input cavity and is connected to the intermediate helical gear for transmission. A Hall controller is provided inside the flange cover.

[0006] Preferably, a hollow worm gear is fitted onto the end of the motor shaft extending into the input cavity, the hollow worm gear meshing with an intermediate helical gear, and the axis of the motor shaft being parallel to the axis of the output shaft.

[0007] Preferably, the housing has an installation port at one end of the reduction chamber, and a threaded cap for sealing the port is screwed onto the installation port. The intermediate worm and intermediate helical gear are installed into the reduction chamber through the installation port.

[0008] Preferably, the flange cover has brush holders evenly arranged along its circumference, the motor shaft has a commutator and a brush holder sleeved on its outer side, the brush holder is mounted on the brush holder, the wire harness on the brush holder extends outward through the flange cover, and the Hall controller is set on the brush holder for precisely adjusting the speed, torque and direction of the motor shaft.

[0009] Preferably, the housing has an output end cover at the output port, the output shaft is supported on the output end cover by a composite bushing, and the output shaft has pedal mounting grooves on the two side walls on the outer side of the housing for mounting pedals.

[0010] Preferably, the housing has multiple mounting blocks on the outer walls of the deceleration chamber and the output chamber, and the mounting blocks have mounting holes.

[0011] The beneficial effects of this utility model are:

[0012] 1. By integrating the motor and gearbox into one unit, especially the one-piece molding of the housing and motor end cover (flange cover), and the parallel arrangement of the motor shaft and output shaft, the entire drive unit structure is extremely compact, and the axial and radial dimensions are optimized, perfectly adapting to the narrow installation space under the vehicle chassis.

[0013] 2. The two-stage reduction scheme of "worm-helical gear" + "worm-helical gear" can achieve an extremely high reduction ratio, thereby outputting the huge torque required to drive the heavy-duty pedal. At the same time, the reverse self-locking characteristic of the worm drive ensures that the pedal will not have unexpected reverse movement when it is extended under load or retracted, making it safe and reliable.

[0014] 3. The output shaft extends horizontally directly from both ends of the housing and is designed with pedal mounting slots to connect directly or indirectly to the pedals on both sides, ensuring the synchronicity and smoothness of pedal extension and retraction.

[0015] 4. By integrating the Hall controller into the brush assembly inside the motor, precise closed-loop control of motor speed, direction, and position is achieved;

[0016] 5. The gearbox adopts a split-chamber design, and the transmission components adopt a modular installation method (through the side mounting port), which facilitates assembly, testing and subsequent maintenance, and reduces manufacturing and operating costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0019] Figure 3This is a cross-sectional view of the input cavity and deceleration cavity of this utility model;

[0020] Figure 4 This is a cross-sectional view of the output cavity of this utility model;

[0021] Figure 5 This is a front view of the housing of this utility model;

[0022] Figure 6 This is a rear view of the housing of this utility model.

[0023] In the diagram: 1. Motor body; 11. Housing; 12. Stator; 13. Rotor; 14. Motor shaft; 15. Hall controller; 16. Hollow worm gear; 17. Commutator; 18. Brush holder; 19. Wiring harness; 2. Gearbox; 21. Housing; 211. Input chamber; 212. Reduction chamber; 213. Output chamber; 214. Input port; 215. Flange cover; 216. Output port; 217. Mounting port; 218. Brush holder; 22. Intermediate worm gear; 23. Intermediate helical gear; 24. Output shaft; 241. Pedal mounting slot; 25. Output helical gear; 26. Threaded cover; 27. Output end cover; 28. Composite bushing; 29. ​​Mounting block; 291. Mounting hole. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0025] Example: Figures 1 to 6 The illustrated geared motor for automotive pedals includes a motor body 1 and a gearbox 2 that is connected to it for transmission.

[0026] The gearbox 2 includes a housing 21, which is preferably made of high-strength aluminum alloy by die casting to ensure lightweight and good structural strength. The housing 21 has an input cavity 211, a deceleration cavity 212 and an output cavity 213 that are connected in sequence and perpendicular to each other. The housing 21 has an input port 214 on one side of the input cavity 211 and a flange cover 215 integrally formed on its outer side. This eliminates the seam of the traditional split end cover connection, improves the sealing performance and overall rigidity, and reduces the number of parts.

[0027] The motor body 1 includes a housing 11, a stator 12, a rotor 13 and a motor shaft 14. The housing 11 is mounted on a flange cover 215. The end of the motor shaft 14 passes through the inlet 214 and extends into the inlet cavity 211. A hollow worm gear 16 is press-fitted or fixed at the front end of the motor shaft 14.

[0028] The reduction chamber 212 contains an intermediate worm 22 and an intermediate helical gear 23 sleeved on the intermediate worm 22. The two rotate coaxially. The hollow worm 16 meshes with the intermediate helical gear 23, forming the first stage of "worm-helical gear" reduction. The output chamber 213 contains an output shaft 24 and an output helical gear 25 sleeved on the output shaft 24 and meshing with the intermediate worm 22. The output helical gear and the intermediate worm 22 form the second stage of "worm-helical gear" reduction.

[0029] The housing 21 has output ports 216 at both ends of the output chamber 213. The housing 21 has output end caps 27 on the output ports 216. The output shaft 24 is supported on the output end caps 27 by a composite bushing 28. Both ends of the output shaft 24 extend outward through the output ports 216 (the output shaft 24 can also be selected to extend out at one end and be sealed with a sealing ring according to actual needs). The two side walls of the output shaft 24 on the outside of the housing 21 have pedal mounting grooves 241 for mounting pedals, which are used to connect to the pedal drive arms on the left and right sides of the vehicle by key or directly. The axis of the motor shaft 14 is parallel to the axis of the output shaft 24, which allows the entire drive motor to be mounted on the side of the vehicle chassis beam like a flat "box", maximizing the use of space.

[0030] The housing 21 has a large mounting port 217 at one end of the reduction chamber 212. A threaded cover 26 for sealing the mounting port 217 is screwed onto the mounting port 217. During final assembly, the intermediate worm gear 22 and intermediate helical gear 23 can be assembled first, and then the whole assembly can be placed into the reduction chamber 212 through the mounting port 217. Finally, the threaded cover 26 is tightened. This design greatly facilitates assembly and future maintenance.

[0031] Brush holders 218 are evenly arranged along the circumference of the inner flange cover 215. A commutator 17 and a brush holder 18 are sleeved on the outer side of the motor shaft 14. The brush holder 18 is mounted on the brush holder 218. The wire harness 19 on the brush holder 18 passes through the flange cover 215 and extends to the outside. A Hall controller 15 is provided on the brush holder 18. The power line on the brush holder 18 and the signal line of the Hall controller 15 are combined into a single wire harness 19, which is led out from the wire hole on the flange cover 215. This built-in design makes the motor an intelligent power unit. The external controller only needs to provide power and simple signals to achieve precise closed-loop control of the motor speed, rotation direction and stop position through the built-in Hall controller 15, thereby accurately controlling the extension speed and travel of the pedal.

[0032] The housing 21 has multiple mounting blocks 29 integrally cast on the outer wall of the reduction chamber 212 and the output chamber 213. The mounting blocks 29 have mounting holes 291. Through these mounting blocks 29, the entire reduction drive motor can be securely mounted on the predetermined position of the vehicle chassis using bolts.

[0033] When the car door is opened, the vehicle control system sends an "extend" command to the drive motor and supplies power. The motor shaft 14 of the motor body 1 begins to rotate, driving the intermediate helical gear 23 through the hollow worm gear 16 to reduce the speed, increase the torque, and change the transmission direction. The intermediate helical gear 23 drives the intermediate worm gear 22, which is coaxial with it, to rotate. The intermediate worm gear 22 then drives the output helical gear 25 to further reduce the speed, double the torque, and change the transmission direction again. Finally, the output shaft 24 obtains low-speed, high-torque rotational power. The output shaft 24 drives the pedal linkage mechanism (such as a linkage or swing arm) on both sides through the pedal mounting slots 241 at both ends, so that the pedal extends smoothly and powerfully from under the car to a position that is easy to step on. The built-in Hall controller 15 monitors the motor's operating status in real time to ensure accurate and timely action. When the car door is closed, the motor reverses, and the pedal is retracted to the under the car in the same way. Since both stages of transmission contain worm gear structures, the system has reliable self-locking properties, and the pedal can be stably stopped at any intermediate position.

Claims

1. A speed-reducing motor for an automobile pedal, comprising a motor body (1) and a speed-reducing box (2) in driving connection with the motor body (1), characterized in that: The gearbox (2) includes a housing (21), which contains an input chamber (211), a reduction chamber (212), and an output chamber (213) that are connected in sequence and whose axes are perpendicular to each other. The housing (21) has an input port (214) on one side of the input chamber (211) and a flange cover (215) integrally formed on its outer side. The reduction chamber (212) contains an intermediate worm gear (22) and an intermediate helical gear (23) sleeved on the intermediate worm gear (22). The output chamber (213) contains an output shaft (24) and a gear sleeved on the output shaft (24) that meshes with the intermediate worm gear (22). The output helical gear (25) is provided. The housing (21) has output ports (216) at both ends of the output cavity (213). The two ends of the output shaft (24) extend to the outside through the output ports (216). The motor body (1) includes a housing (11), a stator (12), a rotor (13) and a motor shaft (14). The housing (11) is mounted on the flange cover (215). The end of the motor shaft (14) passes through the input port (214) and extends into the input cavity (211) and is connected to the intermediate helical gear (23) for transmission. The flange cover (215) is provided with a Hall controller (15).

2. The reduction motor for an automobile pedal according to claim 1, characterized by: The end of the motor shaft (14) extending into the input cavity (211) is fitted with a hollow worm gear (16), which meshes with the intermediate helical gear (23). The axis of the motor shaft (14) is parallel to the axis of the output shaft (24).

3. The geared motor for automotive pedals according to claim 1, characterized in that: The housing (21) has an installation port (217) at one end of the deceleration chamber (212). A threaded cap (26) for sealing the port is screwed onto the installation port (217). The intermediate worm (22) and intermediate helical gear (23) are installed into the deceleration chamber (212) through the installation port (217).

4. The speed reduction motor for an automobile pedal according to claim 1, characterized by: The flange cover (215) is uniformly provided with brush holders (218) along its circumference. The motor shaft (14) is fitted with a commutator (17) and a brush holder (18) on its outer side. The brush holder (18) is installed on the brush holder (218). The wire harness (19) on the brush holder (18) extends to the outside through the flange cover (215). The Hall controller (15) is set on the brush holder (18) and is used to precisely adjust the speed, torque and direction of the motor shaft (14).

5. The speed reduction motor for an automobile pedal according to claim 1, characterized by: The housing (21) has an output end cover (27) on the output port (216). The output shaft (24) is supported on the output end cover (27) by a composite bushing (28). The output shaft (24) has pedal mounting grooves (241) for mounting pedals on two side walls on the outside of the housing (21).

6. The speed reduction motor for an automobile pedal according to claim 1, characterized by: The housing (21) has multiple mounting blocks (29) for installation on the outer walls of the deceleration chamber (212) and the output chamber (213), and mounting holes (291) are provided on the mounting blocks (29).

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