Motor assembly for electric pedal

Abstract

The utility model relates to the field of electric pedals, and discloses a motor assembly for an electric pedal, which comprises a motor (1) and a transmission mechanism (2) driven by the motor (1), the transmission mechanism (2) comprises a transmission shell (3), the transmission shell (3) comprises a worm shell (4) and a worm gear shell (5), a worm gear (7) is assembled in the worm gear shell (5), a worm (6) is assembled in the worm shell (4), the worm (6) is connected with the output end of the motor (1), and the worm (6) is connected with the output end of the motor (1). And the worm gear (7) is connected with an output shaft (8). The motor assembly has the advantages of stable and reliable transmission and fast response.

Description

Technical Field

[0001] The utility model relates to the field of electric telescopic pedals, in particular to a motor assembly used for the electric pedals. Background Art

[0002] Currently, for vehicles with taller chassis, such as SUVs and MPVs, electric retractable running boards are often installed on the underside of the vehicle to facilitate entry and exit. When the door is opened, the board automatically extends, making it easier for passengers to step on it. When the door is closed, the board automatically retracts, ensuring the vehicle's passability. However, traditional electric retractable running boards have a weak load-bearing capacity. When subjected to heavy loads, the connection between the transmission mechanism and the board is prone to fracture, causing damage to the board and, in severe cases, causing passengers to fall and injure.

[0003] Chinese patent CN109895703B provides an electric telescopic pedal device for a vehicle and a vehicle. The power component of the telescopic pedal comes from a motor. The existing motor drive assembly has disadvantages such as delayed transmission response, gaps in assembly, and short service life due to assembly and structural design problems. Utility Model Content

[0004] The utility model aims at the shortcomings of the prior art and provides a motor assembly for an electric pedal.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] The motor assembly for the electric pedal includes a motor and a transmission mechanism driven by the motor. The transmission mechanism includes a transmission housing. The transmission housing includes a worm housing and a worm wheel housing. A worm wheel is installed in the worm wheel housing. A worm is installed in the worm housing. The worm is connected to the output end of the motor, and the worm wheel is connected to the output shaft.

[0007] Preferably, the output end of the motor is a mounting hole, the worm is fixedly installed in the mounting hole, and the operation of the motor drives the worm to rotate synchronously; the worm and the worm wheel are engaged with each other; the worm wheel is also connected to a planetary reduction mechanism; the output end of the planetary reduction mechanism is connected to the output shaft.

[0008] Preferably, the worm gear housing includes a front housing and a rear housing, the front housing and the worm housing are an integrally formed structure, the rear housing is fixedly connected to the front housing by screws, the planetary reduction mechanism includes planetary gears and a transmission gear ring meshed with the planetary gears, and the transmission gear ring is fixedly connected to the rear housing; an installation chamber is provided in the rear housing, and a mounting hole for the transmission shaft to pass through is provided in the middle of the bottom surface of the installation chamber, the bottom surface of the installation chamber includes a first limiting surface, and a limiting bayonet is provided on the side wall of the installation chamber; the inner side of the transmission gear ring is a tooth side, and a block corresponding to the limiting bayonet is provided on the outer side, and the transmission gear ring rests on the first limiting surface.

[0009] Preferably, a bearing chamber is provided in the middle of the first limiting surface, and a transmission bearing for connecting to the transmission shaft is installed in the bearing chamber. The transmission shaft includes a disk portion and a shaft portion, and the shaft portion extends out after fitting with the transmission bearing; a second limiting surface is provided in the middle of the first limiting surface, and the disk portion is located in the mounting groove formed by the second limiting surface; the disk portion is provided with a mounting hole for mounting a planetary gear shaft component, and the planetary gear is fixedly mounted on the disk portion through the shaft component, and the planetary gear is engaged with the transmission gear ring to drive the disk portion to rotate.

[0010] Preferably, it also includes a sun gear in the middle, a tooth groove is provided in the middle of the worm gear, the sun gear is inserted into the tooth groove and fixed with the worm gear in a circumferential limit direction, and the protruding part of the sun gear is engaged with the planetary gear to drive the planetary gear to rotate.

[0011] Preferably, it also includes a central shaft, one end of which is connected through a bearing seat, and the other end is inserted into the hole in the middle of the disk. The central shaft and the hole in the middle of the disk are clearance-fitted, and the central shaft passes through the worm gear and the sun gear in sequence.

[0012] Preferably, the number of the limiting bayonet is 4.

[0013] Preferably, the front shell and the rear shell are positioned and fixed to each other by providing a positioning structure.

[0014] Compared to existing technologies, this solution offers the following advantages: The motor's output hole design reduces the axial dimension of the shaft assembly and improves the motor's drive efficiency. Furthermore, the transmission structure provides reliable positioning and a compact internal housing design. The transmission is highly precise and responsive, and the integrated output shaft structure and disc structure enhance output efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the overall structure of the device.

[0016] Figure 2 for Figure 1 sectional view of .

[0017] Figure 3 yes Figure 1 Schematic diagram of the structure with the front shell removed.

[0018] Figure 4 yes Figure 3 sectional view of .

[0019] Figure 5 It is a schematic diagram of the meshing of the transmission shaft and the planetary gear.

[0020] The technical names of the reference numerals in the drawing are: 1 - motor, 2 - transmission mechanism, 3 - transmission housing, 4 - worm housing, 5 - worm gear housing, 6 - worm, 7 - worm gear, 8 - output shaft, 9 - front housing, 10 - rear housing, 11 - planetary gear, 12 - transmission gear ring, 13 - mounting chamber, 14 - first limiting surface, 15 - limiting socket, 16 - clamping block, 17 - transmission bearing, 18 - second limiting surface, 19 - mounting groove, 20 - sun gear, 21 - gear slot, 22 - central shaft, 23 - shaft part, 24 - disc part. DETAILED DESCRIPTION

[0021] The utility model will be described in further detail below in combination with the drawings and examples.

[0022] Example 1

[0023] The motor 1 assembly for the electric pedal comprises a motor 1 and a transmission mechanism 2 driven by the motor 1, the transmission mechanism 2 comprises a transmission housing 3, the transmission housing 3 comprises a worm housing 4 and a worm gear housing 5, the worm gear housing 5 is internally fitted with a worm gear 7, the worm housing 4 is internally fitted with a worm 6, the worm 6 is connected with the output end of the motor 1, and the worm gear 7 is connected with an output shaft 8. The two ends of the worm housing 4 body are provided with bearing seats, the two ends of the worm 6 are mounted with the worm housing 4 body through the bearing seats, and one end of the worm 6 protrudes from the end of the worm housing 4 and is fixedly installed with the output hole of the motor 1.

[0024] As described above, in order to solve the space and improve the degree of integration, the output end of the motor 1 is a mounting hole, the worm 6 is fixedly installed in the mounting hole, and the motor 1 drives the worm 6 to rotate synchronously; the worm 6 is meshed with the worm gear 7; the worm gear 7 is further connected with a planetary reduction mechanism; and the output end of the planetary reduction mechanism is connected with the output shaft 8.

[0025] In order to facilitate the installation of the worm gear 7 and the planetary reduction mechanism, the worm gear housing 5 comprises a front housing 9 and a rear housing 10, the front housing 9 and the worm housing 4 are integrally formed, the rear housing 10 is fixedly connected with the front housing 9 through screws, the planetary reduction mechanism comprises a planetary gear 11 and a transmission gear ring 12 meshed with the planetary gear 11, the planetary gear 11 is a gear, and the planetary gear 11 rolls along the transmission gear ring 12 to drive the transmission shaft to rotate. In order to quickly and reliably install the transmission gear ring 12, the transmission gear ring 12 is fixedly connected with the rear housing 10; the rear housing 10 is internally provided with a mounting chamber 13, the bottom surface of the mounting chamber 13 is provided with a mounting hole for the transmission shaft to pass out, the bottom surface of the mounting chamber 13 comprises a first limiting surface 14, and the side wall of the mounting chamber 13 is provided with a limiting socket 15; the inner side of the transmission gear ring 12 is a tooth side, and the outer side is provided with a clamping block 16 corresponding to the limiting socket 15, and the transmission gear ring 12 abuts against the first limiting surface 14. Specifically, the limiting socket 15 can be coated with glue for fixing the transmission gear ring 12 with the rear housing 10, and the first limiting surface 14 can also be coated with glue.

[0026] In this embodiment, a bearing chamber is provided in the middle of the first limiting surface 14. A transmission bearing 17 for connection to a transmission shaft is installed in the bearing chamber. The transmission shaft includes a disc portion 24 and a shaft portion 23. The shaft portion 23 extends out after engaging with the transmission bearing 17. A second limiting surface 18 is provided in the middle of the first limiting surface 14. The disc portion 24 is located within a mounting groove 19 formed by the second limiting surface 18. The disc portion 24 is provided with a mounting hole for mounting the shaft of the planetary gear 11. The planetary gear 11 is fixedly mounted on the disc portion 24 via the shaft. The planetary gear 11 engages with the transmission gear ring 12 to drive the disc portion 24 to rotate. The planetary gear 11 is first fixedly connected to the disc portion 24, and then the transmission shaft extends out of the transmission bearing 17, with the two having an interference fit.

[0027] This embodiment also includes a central sun gear 20. A tooth groove 21 is provided in the central portion of the worm gear 7. The sun gear 20 is inserted into the tooth groove 21 and fixed to the worm gear 7 in a circumferentially limited manner. The extended portion of the sun gear 20 engages with the planetary gears 11, driving the planetary gears 11 to rotate. The central shaft 22 is also included. One end of the central shaft 22 is connected via a bearing seat, and the other end is inserted into the hole in the central portion of the disk portion 24. The central shaft 22 and the hole in the central portion of the disk portion 24 are clearance-fitted. The central shaft 22 passes through the worm gear 7 and the sun gear 20 in sequence. In this embodiment, the front housing 9 and the rear housing 10 are positioned and fixed to each other by positioning structures.

[0028] Example 2

[0029] The difference between this embodiment and embodiment 1 is that the number of the limiting bayonet 15 is four.

[0030] Example 3

[0031] The difference between this embodiment and embodiment 1 is that a limiting cutout is provided on the shaft portion 23 of the transmission shaft, and the limiting cutout is a plane.

Claims

1. A motor assembly for an electric step, characterized by: The invention comprises a motor (1) and a transmission mechanism (2) driven by the motor (1), wherein the transmission mechanism (2) comprises a transmission housing (3), the transmission housing (3) comprises a worm housing (4) and a worm wheel housing (5), a worm wheel (7) is mounted in the worm wheel housing (5), a worm (6) is mounted in the worm housing (4), the worm (6) is connected to the output end of the motor (1), and the worm wheel (7) is connected to the output shaft (8).

2. The motor assembly for an electric scooter according to claim 1, characterized in that: The output end of the motor (1) is a mounting hole, and the worm (6) is fixedly mounted in the mounting hole. The operation of the motor (1) drives the worm (6) to rotate synchronously; the worm (6) and the worm wheel (7) are meshed with each other; the worm wheel (7) is also connected to a planetary reduction mechanism; and the output end of the planetary reduction mechanism is connected to an output shaft (8).

3. The motor assembly for an electric scooter according to claim 2, characterized in that: The worm housing (5) comprises a front housing (9) and a rear housing (10), the front housing (9) and the worm housing (4) are an integrally formed structure, the rear housing (10) and the front housing (9) are fixedly connected by screws, the planetary reduction mechanism comprises a planetary gear (11) and a transmission gear ring (12) meshed with the planetary gear (11), and the transmission gear ring (12) is fixedly connected to the rear housing (10); an installation chamber (13) is provided in the rear housing (10), a mounting hole for a transmission shaft to pass through is provided in the middle of the bottom surface of the installation chamber (13), the bottom surface of the installation chamber (13) comprises a first limiting surface (14), and a limiting bayonet (15) is provided on the side wall of the installation chamber (13); the inner side of the transmission gear ring (12) is a tooth side, and the outer side is provided with a block (16) corresponding to the limiting bayonet (15), and the transmission gear ring (12) abuts against the first limiting surface (14).

4. The motor assembly for an electric scooter according to claim 3, characterized in that: A bearing chamber is provided in the middle of the first limiting surface (14), and a transmission bearing (17) for connecting to a transmission shaft is installed in the bearing chamber. The transmission shaft includes a disk portion (24) and a shaft portion (23). The shaft portion (23) extends out after being matched with the transmission bearing (17); a second limiting surface (18) is provided in the middle of the first limiting surface (14), and the disk portion (24) is located in a mounting groove (19) formed by the second limiting surface (18); the disk portion (24) is provided with a mounting hole for mounting a shaft member of a planetary gear (11), and the planetary gear (11) is fixedly mounted on the disk portion (24) through the shaft member. The planetary gear (11) engages with the transmission gear ring (12) to drive the disk portion (24) to rotate.

5. The motor assembly for an electric scooter according to claim 4, characterized in that: The invention also includes a sun gear (20) in the middle, a tooth groove (21) is provided in the middle of the worm gear (7), the sun gear (20) is inserted into the tooth groove (21) and is fixed to the worm gear (7) in a circumferential direction, and the protruding part of the sun gear (20) is engaged with the planet gear (11) to drive the planet gear (11) to rotate.

6. The motor assembly for an electric scooter according to claim 5, characterized in that: The invention also includes a central shaft (22), one end of which is connected through a bearing seat, and the other end is inserted into the hole in the middle of the disk portion (24). The central shaft (22) and the hole in the middle of the disk portion (24) are clearance-matched, and the central shaft (22) passes through the worm gear (7) and the sun gear (20) in sequence.

7. The motor assembly for an electric scooter according to claim 2, characterized in that: The number of the position limiting bayonet (15) is 4.

8. The motor assembly for an electric scooter according to claim 2, characterized in that: The front housing (9) and the rear housing (10) are positioned and fixed to each other by arranging a positioning structure.

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