Gear motor, electric pedal and vehicle

Abstract

The invention discloses a gear motor, an electric pedal and a vehicle. The speed reduction motor comprises a stator assembly, a rotor assembly, a speed reduction box and a buffer assembly, a part of structure of the rotor assembly is arranged in the stator assembly, the rotor assembly comprises a worm rotating shaft, the rotor assembly outputs torque through the worm rotating shaft, the speed reduction box is in transmission connection with the worm rotating shaft, and a worm part of the worm rotating shaft is arranged in the speed reduction box. The reduction gearbox is provided with a first end base, the end, away from the stator assembly, of the worm part is supported on the first end base, the buffering assembly is arranged on the first end base, and the worm part abuts against the buffering assembly. By means of the mode, the speed reducing motor can avoid abnormal sound generated when the pedal begins to be unfolded and retracted in place, and comfort of the electric pedal is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of automobile accessories, and in particular to a reduction motor, an electric pedal and a vehicle. Background Art

[0002] In order to assist the driver and passengers to enter and exit the vehicle cabin conveniently, 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 the driver and passengers to enter and exit the vehicle cabin conveniently, and can automatically retract when the door is closed to ensure the vehicle's passability and appearance. However, in existing electric pedals, the reduction motor often makes a loud abnormal noise when the pedal begins to extend and retract, which affects the comfort of the electric pedal. Summary of the invention

[0003] The present application provides a reduction motor, an electric pedal and a vehicle, which can solve the problem in the prior art that the reduction motor makes a loud abnormal noise and affects comfort when the pedal starts to extend and retract.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a reduction motor, the reduction motor comprising: a stator assembly; a rotor assembly, part of the structure of the rotor assembly is arranged in the stator assembly, the rotor assembly comprises a worm shaft, and the rotor assembly outputs torque through the worm shaft; a reduction box, the reduction box is transmission-connected to the worm shaft, the worm part of the worm shaft is arranged in the reduction box, the reduction box is provided with a first end seat, and one end of the worm part away from the stator assembly is supported on the first end seat; and a buffer assembly, arranged on the first end seat, and the worm part abuts against the buffer assembly.

[0005] In some embodiments, the buffer assembly includes a first wear-resistant plate and a buffer pad, the first end seat includes a first accommodating groove and a second accommodating groove, the first accommodating groove and the second accommodating groove are connected, the buffer pad is arranged in the first accommodating groove, the first wear-resistant plate is arranged in the second accommodating groove, the first wear-resistant plate abuts against the buffer pad, the worm part abuts against the first wear-resistant plate, and there is a buffer gap between the first wear-resistant plate and the bottom of the second accommodating groove.

[0006] In some embodiments, the buffer gap is greater than 0 mm and less than 1 mm.

[0007] In some embodiments, the first wear-resistant sheet is made of carbon fiber, and the buffer pad is made of rubber.

[0008] In some embodiments, a groove wall of the second accommodating groove is provided with a first guide structure, and the first wear-resistant sheet is provided with a second guide structure, and the first guide structure is slidably connected to the second guide structure.

[0009] In some embodiments, the first guiding structure is a protrusion structure, and the second guiding structure is a groove structure.

[0010] In some embodiments, the first end seat also includes a third receiving groove connected to the second receiving groove, the reduction gearbox includes a first sleeve, the first sleeve is arranged in the third receiving groove, and one end of the worm part away from the stator assembly is passed through the first sleeve.

[0011] In some embodiments, the stator assembly includes a shell, a second sleeve and a second wear-resistant plate, the shell is fixed to the reduction gear box, the shell is provided with a second end seat, the second sleeve and the second wear-resistant plate are arranged on the second end seat, the worm shaft includes an optical axis portion connected to the worm portion, and one end of the optical axis portion away from the worm portion is passed through the second sleeve and abuts against the second wear-resistant plate.

[0012] In some embodiments, the stator assembly further includes four magnetic tiles, which are disposed in the housing and arranged around the worm shaft.

[0013] In some embodiments, the end of the shell is recessed inward to form four support structures, the four support structures are arranged around the second end seat, and each of the magnetic tiles is supported by each of the support structures.

[0014] In some embodiments, the diameter of the housing is greater than 30 mm and less than 70 mm.

[0015] In some embodiments, the lead angle of the worm portion is greater than 0° and less than 5°.

[0016] In some embodiments, the reduction gear box includes a gear assembly, a plurality of planetary gears, a ring gear and a gear frame. The gear assembly and the planetary gears are arranged on the gear frame. The gear assembly includes a coaxially arranged worm gear and a sun gear. The worm part is meshed with the worm gear, and each of the planetary gears is respectively meshed with the sun gear and the ring gear. When the plurality of planetary gears rotate around the sun gear, they can drive the gear frame to rotate.

[0017] In some embodiments, the reduction gearbox also includes a housing and an output shaft, the stator assembly is fixed to the housing, the gear assembly, the plurality of planetary gears, the ring gear and the gear rack are arranged in the housing, the ring gear is engaged with the housing, and the output shaft is fixed to the gear rack to rotate with the gear rack.

[0018] In some embodiments, the reduction motor further includes a first sealing ring, a second sealing ring and an oil baffle ring, wherein the first sealing ring abuts between the stator assembly and the housing, the oil baffle ring is sleeved on the output shaft and installed on the housing, the housing includes a first shell and a second shell connected to each other, and the second sealing ring abuts between the first shell and the second shell.

[0019] In some embodiments, the worm shaft is perpendicular to the output shaft, the distance between the central axis of the worm shaft and the end face of the free end of the output shaft is greater than 115 mm and less than 160 mm, and the distance between the central axis of the output shaft and the end face of the stator assembly away from the reduction gear box is greater than 85 mm and less than 130 mm.

[0020] In some embodiments, the transmission ratio between the worm portion and the worm wheel is greater than 40 and less than 100.

[0021] In some embodiments, there are three planetary gears, the sun gear is coaxially arranged with the ring gear, and the three planetary gears are evenly distributed around the sun gear and are located between the sun gear and the ring gear.

[0022] Another technical solution adopted in the present application is to provide an electric pedal, which includes the above-mentioned reduction motor.

[0023] Another technical solution adopted in the present application is: providing a vehicle, the vehicle comprising the above-mentioned reduction motor.

[0024] The beneficial effects of the present application are as follows: Different from the prior art, the reduction motor provided by the present application includes: a stator assembly; a rotor assembly, wherein part of the structure of the rotor assembly is arranged in the stator assembly, the rotor assembly includes a worm shaft, and the rotor assembly outputs torque through the worm shaft; a reduction box, wherein the reduction box is connected to the worm shaft in a transmission manner, the worm part of the worm shaft is arranged in the reduction box, the reduction box is provided with a first end seat, and one end of the worm part away from the stator assembly is supported on the first end seat; and a buffer assembly, which is arranged on the first end seat, and the worm part abuts against the buffer assembly. In the technical solution of the present application, the worm shaft abuts against the buffer assembly, so that the buffer assembly can absorb the kinetic energy of the worm shaft during axial movement. In this way, the reduction motor can avoid abnormal noise when the pedal begins to be extended and retracted, thereby ensuring the comfort of the electric pedal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a schematic diagram of the structure of a reduction motor provided in some embodiments of the present application;

[0027] Figure 2 is an exploded schematic diagram of a reduction motor provided in some embodiments of the present application;

[0028] Figure 3 is a schematic structural diagram of a first housing provided in some embodiments of the present application;

[0029] Figure 4 yes Figure 3 A cross-sectional view of the first shell at AA;

[0030] Figure 5 is a schematic structural diagram of a first wear-resistant sheet provided in some embodiments of the present application;

[0031] Figure 6 is a schematic diagram of the structure of an electric pedal provided in some embodiments of the present application;

[0032] Figure 7 It is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.

[0033] Description of reference numerals: 100-reduction motor, 110-stator assembly, 111-housing, 1111-second end seat, 1112-support structure, 112-second shaft sleeve, 113-second wear-resistant sheet, 114-magnetic tile, 120-rotor assembly, 121-worm shaft, 1211-worm part, 1212-optical axis part, 130-reduction box, 131-box body, 1311-first end seat, 1311a-first accommodating groove, 1311b-second accommodating groove, 1311c-third accommodating groove, 1311 d-first guide structure, 1312-first housing, 1313-second housing, 132-first bushing, 133-gear assembly, 1331-worm gear, 1332-sun gear, 134-planetary gear, 135-gear ring, 136-gear rack, 137-output shaft, 140-buffer assembly, 141-first wear-resistant plate, 1411-second guide structure, 142-buffer pad, 150-first sealing ring, 160-second sealing ring, 170-oil baffle ring, 1000-electric pedal, 10000-vehicle. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0035] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] The present application provides a reduction motor, which includes: a stator assembly; a rotor assembly, wherein a part of the structure of the rotor assembly is arranged in the stator assembly, the rotor assembly includes a worm shaft, and the rotor assembly outputs torque through the worm shaft; a reduction box, wherein the reduction box is connected to the worm shaft in a transmission manner, and the worm part of the worm shaft is arranged in the reduction box, and the reduction box is provided with a first end seat, and one end of the worm part away from the stator assembly is supported on the first end seat; and a buffer assembly, which is arranged on the first end seat, and the worm part abuts against the buffer assembly. In the technical solution of the present application, the worm shaft abuts against the buffer assembly, so that the buffer assembly can absorb the kinetic energy of the worm shaft during axial movement. In this way, the reduction motor can avoid abnormal noise when the pedal begins to be extended and retracted, thereby ensuring the comfort of the electric pedal.

[0038] Please refer to Figure 1-Figure 6 , Figure 1 is a schematic diagram of the structure of a reduction motor provided in some embodiments of the present application, Figure 2 is an exploded schematic diagram of a reduction motor provided in some embodiments of the present application, Figure 3 is a schematic diagram of the structure of the first housing provided in some embodiments of the present application, Figure 4 yes Figure 3 A cross-sectional view of the first shell at AA, Figure 5 1 is a schematic diagram of the structure of the first wear-resistant sheet provided in some embodiments of the present application. The reduction motor 100 provided in the present application may include but is not limited to a stator assembly 110, a rotor assembly 120, a reduction box 130 and a buffer assembly 140. Part of the structure of the rotor assembly 120 is arranged in the stator assembly 110 and the rotor assembly 120 can rotate relative to the stator assembly 110. The stator assembly 110 is used to provide a first magnetic field. The rotor assembly 120 can provide a second magnetic field after being energized. The second magnetic field interacts with the first magnetic field, so that the rotor assembly 120 is subjected to the action of force and rotates, and then outputs torque, converting electrical energy into mechanical energy. Among them, the rotor assembly 120 includes a worm shaft 121. The rotor assembly 120 outputs torque through the worm shaft 121. The reduction box 130 is connected to the worm shaft 121 in a transmission manner to achieve deceleration and torque increase. The worm shaft 121 may include but is not limited to an optical axis portion 1212 and a worm portion 1211. The optical axis portion 1212 is connected to the worm portion 1211. The optical axis portion 1212 is disposed in the stator assembly 110, and the worm portion 1211 is disposed in the reduction box 130. The reduction box 130 is provided with a first end seat 1311. The buffer assembly 140 is disposed at the first end seat 1311. One end of the worm portion 1211 away from the stator assembly 110 is supported on the first end seat 1311 and abuts against the buffer assembly 140, so as to avoid abnormal noise caused by axial movement and affect comfort under the buffering effect of the buffer assembly 140.

[0039] It is understandable that the worm shaft 121 in the reduction motor 100 will have an axial force during the transmission process. In particular, in the scenario where the reduction motor 100 is applied to the electric pedal 1000, the load acting on the reduction motor 100 changes dramatically when the electric pedal 1000 begins to be extended and retracted, causing the axial force on the worm shaft 121 to change greatly, thereby causing the reduction motor 100 to produce a large abnormal noise due to the axial movement of the worm shaft 121, seriously affecting the comfort of the electric pedal 1000. The present application utilizes the energy absorption and buffering effect of the buffer assembly 140 by abutting the end of the worm shaft 121 against the buffer assembly 140, thereby avoiding the abnormal noise caused by the movement of the worm shaft 121.

[0040] Optionally, the lead angle of the worm portion 1211 can be greater than 0° and less than 5°, so that the worm shaft 121 has a greater self-locking ability. Specifically, the lead angle of the worm portion 1211 can be 0.5°, 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4 or 4.5°, etc. In this embodiment, the lead angle of the worm portion 1211 is 3°.

[0041] Further, the buffer assembly 140 may include but is not limited to a first wear-resistant sheet 141 and a buffer pad 142. The first end seat 1311 may include but is not limited to a first receiving groove 1311a and a second receiving groove 1311b. The first receiving groove 1311a and the second receiving groove 1311b are connected. The buffer pad 142 is arranged in the first receiving groove 1311a to deform and absorb energy when squeezed and automatically recover when the squeezing is withdrawn. The first wear-resistant sheet 141 is arranged in the second receiving groove 1311b to protect the buffer pad 142 and avoid direct contact between the worm shaft 121 and the buffer pad 142, which may easily cause the buffer pad 142 to fail. Specifically, the first wear-resistant sheet 141 abuts against the buffer pad 142, the worm part 1211 abuts against the first wear-resistant sheet 141, and there is a buffer gap between the first wear-resistant sheet 141 and the bottom of the second receiving groove 1311b.

[0042] It can be understood that when the worm shaft 121 is subjected to the axial force and squeezes the first wear-resistant sheet 141, and then squeezes the buffer pad 142, the buffer pad 142 will deform, thereby eliminating the buffer gap, so that the kinetic energy of the worm shaft 121 is converted into the internal energy of the buffer pad 142, thereby preventing the worm shaft 121 from moving and causing abnormal noise. When the axial force acting on the worm shaft 121 disappears, under the action of the restoring force of the buffer pad 142, the worm shaft 121 returns to the initial position, and the buffer gap is restored.

[0043] Further, the buffer gap may be greater than 0 mm and less than 1 mm. Specifically, the buffer gap may be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.5 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm or 0.95 mm, etc. In this embodiment, the buffer gap is 0.15 mm.

[0044] Optionally, the material of the first wear-resistant sheet 141 may be carbon fiber, which is light in weight, strong in strength, and has excellent wear resistance.

[0045] Optionally, the material of the buffer pad 142 may be rubber. Rubber can produce a large deformation under a small external force, and can quickly return to its original shape after the external force is removed, and has excellent buffering performance.

[0046] Furthermore, a first guide structure 1311d is provided on the groove wall of the second receiving groove 1311b. The first wear-resistant sheet 141 is provided with a second guide structure 1411. The first guide structure 1311d is slidably connected with the second guide structure 1411, so that when the first wear-resistant sheet 141 is squeezed by the worm shaft 121, it can squeeze the buffer pad 142 along the force direction of the worm shaft 121 without rotating.

[0047] In this embodiment, the first guide structure 1311d is a protruding structure, and the second guide structure 1411 is a groove structure. In other embodiments, the first guide structure 1311d may be a groove structure, and the second guide structure 1411 may be a protruding structure.

[0048] Further, the first end seat 1311 also includes a third receiving groove 1311c connected to the second receiving groove 1311b. The reduction box 130 includes a first sleeve 132. The first sleeve 132 is arranged in the third receiving groove 1311c, and one end of the worm part 1211 away from the stator assembly 110 is passed through the first sleeve 132. The first sleeve 132 plays a protective role during the rotation of the worm shaft 121. In some other embodiments, the first sleeve 132 can be replaced by a bearing.

[0049] Further, the stator assembly 110 may include but is not limited to a housing 111, a second sleeve 112, and a second wear-resistant sheet 113. The housing 111 is fixed to the reduction box 130. The housing 111 is provided with a second end seat 1111. The second sleeve 112 and the second wear-resistant sheet 113 are arranged on the second end seat 1111. One end of the optical axis portion 1212 away from the worm portion 1211 is passed through the second sleeve 112 and abuts against the second wear-resistant sheet 113. The second sleeve 112 plays a protective role during the rotation of the worm shaft 121. The second wear-resistant sheet 113 plays a protective role during the axial movement of the worm shaft 121.

[0050] Further, the stator assembly 110 also includes at least two magnetic tiles 114. At least two magnetic tiles 114 are disposed in the housing 111 and arranged around the worm shaft 121. In the present embodiment, the stator assembly 110 includes four magnetic tiles 114. Four magnetic tiles 114 are disposed in the housing 111 and arranged around the worm shaft 121. Among them, the arrangement of four magnetic tiles 114 relative to the arrangement of two magnetic tiles 114 can make the torque output by the rotor assembly 120 larger. When the reduction motor 100 is applied to the electric pedal 1000, the arrangement of four magnetic tiles 114 enables the reduction motor 100 to smoothly drive the pedal to be exhibited.

[0051] Further, the end of the housing 111 is recessed inward to form at least two support structures 1112. At least two support structures 1112 are arranged around the second end seat 1111. Each magnetic tile 114 is supported by each support structure 1112. In this embodiment, the end of the housing 111 is recessed inward to form four support structures 1112. The four support structures 1112 are arranged around the second end seat 1111. Each magnetic tile 114 is supported by each support structure 1112.

[0052] Further, the diameter of the housing 111 may be greater than 30 mm and less than 70 mm. Specifically, the diameter of the housing 111 may be 31 mm, 33 mm, 35 mm, 37 mm, 40 mm, 42.5 mm, 45 mm, 47.5 mm, 50 mm, 52.5 mm, 55 mm, 57.5 mm, 60 mm, 62.5 mm, 65 mm, 67.5 mm, 68 mm or 69 mm, etc. In the present embodiment, the diameter of the housing 111 is 52.2 mm.

[0053] Further, the reduction box 130 may include but is not limited to a housing 131, a gear assembly 133, a plurality of planetary gears 134, a ring gear 135, a gear frame 136 and an output shaft 137. The stator assembly 110 is fixed to the housing 131, specifically, the housing 111 is fixed to the housing 131. The gear assembly 133, a plurality of planetary gears 134, a ring gear 135 and a gear frame 136 are arranged in the housing 131. The ring gear 135 is engaged with the housing 131. The gear assembly 133 and the planetary gears 134 are arranged on the gear frame 136. The gear assembly 133 includes a worm gear 1331 and a sun gear 1332 which are coaxially arranged. The worm part 1211 is engaged with the worm gear 1331. Each planetary gear 134 is respectively engaged with the sun gear 1332 and the ring gear 135. When the plurality of planetary gears 134 rotate around the sun gear 1332, the gear frame 136 can be driven to rotate. The output shaft 137 is fixed to the gear frame 136 to rotate along with the gear frame 136 .

[0054] In this embodiment, there are three planetary gears 134. The sun gear 1332 is coaxially arranged with the ring gear 135. The three planetary gears 134 are evenly distributed around the sun gear 1332 and are located between the sun gear 1332 and the ring gear 135.

[0055] Further, the worm shaft 121 is perpendicular to the output shaft 137. The distance between the central axis of the worm shaft 121 and the end face of the free end of the output shaft 137 is greater than 115 mm and less than 160 mm. Specifically, the distance between the central axis of the worm shaft 121 and the end face of the free end of the output shaft 137 can be 116 mm, 118 mm, 120 mm, 122 mm, 125 mm, 127 mm, 130 mm, 135 mm, 137 mm, 140 mm, 142 mm, 145 mm, 147 mm, 150 mm, 152 mm, 155 mm, 157 mm, 158 mm or 159 mm, etc. In this embodiment, the distance between the central axis of the worm shaft 121 and the end face of the free end of the output shaft 137 is 152.65 mm.

[0056] Further, the distance between the central axis of the output shaft 137 and the end surface of the stator assembly 110 away from the reduction box 130 is greater than 85 mm and less than 130 mm. Specifically, the distance between the central axis of the output shaft 137 and the end surface of the stator assembly 110 away from the reduction box 130 can be 86 mm, 88 mm, 90 mm, 92 mm, 95 mm, 97 mm, 100 mm, 102 mm, 105 mm, 107 mm, 110 mm, 112 mm, 115 mm, 117 mm, 120 mm, 122 mm, 125 mm, 127 mm, 128 mm or 129 mm, etc. In this embodiment, the distance between the central axis of the output shaft 137 and the end surface of the stator assembly 110 away from the reduction box 130 is 113.5 mm.

[0057] Further, the transmission ratio between the worm part 1211 and the worm wheel 1331 can be greater than 40 and less than 100, so as to match the appropriate lead angle of the worm part 1211 and ensure the self-locking performance of the worm shaft 121. Specifically, the transmission ratio between the worm part 1211 and the worm wheel 1331 can be 45, 47, 50, 52, 55, 57, 60, 62, 65, 67, 70, 72, 75, 77, 80, 82, 85, 87, 90, 92, 95, 97, 98 or 99, etc. In this embodiment, the transmission ratio between the worm part 1211 and the worm wheel 1331 is 60.

[0058] Furthermore, the reduction motor 100 further includes a first sealing ring 150, a second sealing ring 160 and an oil retaining ring 170. The first sealing ring 150 abuts between the stator assembly 110 and the housing 131. The oil retaining ring 170 is sleeved on the output shaft 137 and installed on the housing 131. The housing 131 includes a first housing 1312 and a second housing 1313 connected to each other. The second sealing ring 160 abuts between the first housing 1312 and the second housing 1313. In this way, the reduction motor 100 can reach the IP69 water discharge level to adapt to the harsh working conditions of the electric pedal 1000.

[0059] The present application provides a reduction motor 100, which is applied to an electric pedal 1000. The reduction motor 100 includes: a stator assembly 110; a rotor assembly 120, wherein a portion of the structure of the rotor assembly 120 is arranged in the stator assembly 110, the rotor assembly 120 includes a worm shaft 121, and the rotor assembly 120 outputs torque through the worm shaft 121; a reduction box 130, wherein the reduction box 130 is transmission-connected to the worm shaft 121, and a worm portion 1211 of the worm shaft 121 is arranged in the reduction box 130, and the reduction box 130 is provided with a first end seat 1311, and one end of the worm portion 1211 away from the stator assembly 110 is supported on the first end seat 1311; and a buffer assembly 140, which is arranged on the first end seat 1311, and the worm portion 1211 abuts against the buffer assembly 140. In the technical solution of the present application, the worm shaft 121 abuts against the buffer assembly 140, so that the buffer assembly 140 can absorb the kinetic energy of the axial movement of the worm shaft 121. In this way, the reduction motor 100 can avoid abnormal noise when the pedal begins to extend and retract, ensuring the comfort of the electric pedal 1000.

[0060] See also Figure 6 , Figure 6 1 is a schematic diagram of the structure of an electric pedal provided in some embodiments of the present application. The electric pedal 1000 provided in the present application may include but is not limited to a reduction motor 100.

[0061] See also Figure 7 , Figure 7 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application. The vehicle 10000 provided in the present application may include but is not limited to an electric pedal 1000.

[0062] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A reduction motor, applied to an electric pedal, characterized in that: include: stator assembly; A rotor assembly, wherein a part of the structure of the rotor assembly is disposed in the stator assembly, the rotor assembly comprises a worm shaft, and the rotor assembly outputs torque through the worm shaft; A reduction box, the reduction box is drivingly connected to the worm shaft, the worm part of the worm shaft is arranged in the reduction box, the reduction box is provided with a first end seat, and one end of the worm part away from the stator assembly is supported on the first end seat; and A buffer assembly is arranged on the first end seat, and the worm part abuts against the buffer assembly.

2. The reduction motor according to claim 1, characterized in that: The buffer assembly includes a first wear-resistant plate and a buffer pad, the first end seat includes a first accommodating groove and a second accommodating groove, the first accommodating groove and the second accommodating groove are connected, the buffer pad is arranged in the first accommodating groove, the first wear-resistant plate is arranged in the second accommodating groove, the first wear-resistant plate abuts against the buffer pad, the worm part abuts against the first wear-resistant plate, and there is a buffer gap between the first wear-resistant plate and the bottom of the second accommodating groove.

3. The reduction motor according to claim 2, characterized in that: The buffer gap is greater than 0 mm and less than 1 mm.

4. The reduction motor according to claim 2, characterized in that: The first wear-resistant sheet is made of carbon fiber, and the buffer pad is made of rubber.

5. The reduction motor according to claim 2, characterized in that: The groove wall of the second accommodating groove is provided with a first guide structure, the first wear-resistant sheet is provided with a second guide structure, and the first guide structure is slidably connected with the second guide structure.

6. The reduction motor according to claim 5, characterized in that: The first guiding structure is a protruding structure, and the second guiding structure is a groove structure.

7. The reduction motor according to claim 2, characterized in that: The first end seat also includes a third accommodating groove connected to the second accommodating groove, the reduction box includes a first sleeve, the first sleeve is arranged in the third accommodating groove, and one end of the worm part away from the stator assembly is passed through the first sleeve.

8. The reduction motor according to claim 1, characterized in that: The stator assembly includes a shell, a second sleeve and a second wear-resistant plate. The shell is fixed to the reduction gearbox. The shell is provided with a second end seat. The second sleeve and the second wear-resistant plate are arranged on the second end seat. The worm shaft includes an optical axis portion connected to the worm portion. One end of the optical axis portion away from the worm portion is passed through the second sleeve and abuts against the second wear-resistant plate.

9. The reduction motor according to claim 8, characterized in that: The stator assembly further includes four magnetic tiles, which are disposed in the housing and arranged around the worm shaft.

10. The reduction motor according to claim 9, characterized in that: The end of the shell is recessed inward to form four supporting structures. The four supporting structures are arranged around the second end seat, and each magnetic tile is supported by each supporting structure.

11. The reduction motor according to claim 8, characterized in that: The diameter of the shell is greater than 30 mm and less than 70 mm.

12. The reduction motor according to claim 1, characterized in that: The lead angle of the worm portion is greater than 0° and less than 5°.

13. The reduction motor according to claim 1, characterized in that: The reduction box includes a gear assembly, a plurality of planetary gears, a ring gear and a gear frame. The gear assembly and the planetary gears are arranged on the gear frame. The gear assembly includes a worm gear and a sun gear arranged coaxially. The worm part is meshed with the worm gear. Each of the planetary gears is respectively meshed with the sun gear and the ring gear. When the plurality of planetary gears rotate around the sun gear, they can drive the gear frame to rotate.

14. The reduction motor according to claim 13, characterized in that: The reduction gearbox also includes a housing and an output shaft, the stator assembly is fixed to the housing, the gear assembly, the plurality of planetary gears, the ring gear and the gear rack are arranged in the housing, the ring gear is engaged with the housing, and the output shaft is fixed to the gear rack to rotate with the gear rack.

15. The reduction motor according to claim 14, characterized in that: The reduction motor also includes a first sealing ring, a second sealing ring and an oil baffle ring. The first sealing ring abuts between the stator assembly and the housing. The oil baffle ring is sleeved on the output shaft and installed on the housing. The housing includes a first shell and a second shell connected to each other. The second sealing ring abuts between the first shell and the second shell.

16. The reduction motor according to claim 14, characterized in that: The worm shaft is perpendicular to the output shaft, the distance between the central axis of the worm shaft and the end face of the free end of the output shaft is greater than 115 mm and less than 160 mm, and the distance between the central axis of the output shaft and the end face of the end of the stator assembly away from the reduction gear box is greater than 85 mm and less than 130 mm.

17. The reduction motor according to claim 13, characterized in that: The transmission ratio between the worm part and the worm wheel is greater than 40 and less than 100.

18. The reduction motor according to claim 13, characterized in that: There are three planetary gears, the sun gear is coaxially arranged with the ring gear, and the three planetary gears are evenly distributed around the sun gear and are located between the sun gear and the ring gear.

19. An electric pedal, characterized in that: It comprises a reduction motor as described in any one of claims 1 to 18.

20. A vehicle, characterized in that: Comprising the electric pedal as claimed in claim 19.

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