A gear case motor

Abstract

The present application relates to a kind of gear box motors, shell uses whole plate material to form cylinder by continuous mortise and tenon connection of bending, there is no gap in axial direction, and by continuous mortise and tenon connection can make riveting projection better with card slot cooperation.The third limit lug of the lower end of motor cooperates with the second limit slot of the lower end of shell, the first limit lug of box and the second limit lug of box cover cooperate with the first limit slot of the upper end of shell, both ends of box are limited, and connection is stable.Ball bearing at box cover is connected using reverse riveting method with output shaft, compared with the way of connecting using circlip, it is more stable, the gap is smaller, and the noise is lower.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a gearbox motor. Background Technology

[0002] A gearbox motor is a motor in which the motor and gearbox are integrated during the manufacturing process. After the motor's main shaft outputs power, the torque is increased through the speed-changing gearbox, resulting in a larger output torque. In existing gearbox motors, the motor and gearbox are generally connected separately, usually by riveting or screw fastening. Due to the presence of gaps, coupled with the long-term vibration of the motor, the noise level tends to increase. Summary of the Invention

[0003] In view of the above situation, it is necessary to propose a gearbox motor that can reduce noise.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a gearbox motor, comprising:

[0005] Electric motor;

[0006] A gearbox includes a housing, a transmission assembly, a drive assembly, and a cover. The transmission assembly and the drive assembly are disposed within the housing. The housing is connected to the cover. The transmission assembly is driven by a motor. The drive assembly is connected to the transmission assembly. The cover has a connection hole for the drive assembly to connect to the outside. The drive assembly includes an output shaft. A ball bearing is provided between the output shaft and the cover. The output shaft is connected to the ball bearing by a reverse riveting method.

[0007] The outer shell is formed by bending a single piece of material and continuously mortising and tenoning the two ends to form a cylindrical body. Several riveted protrusions are provided on the inner wall of the cylindrical body. The housing has slots that mate with the riveted protrusions. Several upward-opening first limiting grooves are provided at the upper end of the outer shell. The housing has first limiting protrusions that mate with the first limiting grooves. The housing cover has second limiting protrusions that mate with the first limiting grooves. Several downward-opening second limiting grooves are provided at the lower end of the outer shell. A third limiting protrusion that mates with the second limiting grooves is provided at the lower end of the motor.

[0008] Furthermore, a first bearing is fitted onto the main shaft of the motor, and a bearing chamber is provided inside the housing. The bearing chamber is provided with elastic hooks arranged in a circular array and a space for the elastic hooks to deform. The hook portion of the elastic hook cooperates with the bearing chamber to restrict the axial movement of the first bearing.

[0009] Furthermore, the transmission assembly includes a first planetary gear set, a first planetary carrier, a second planetary gear set, and a second planetary carrier. The inner wall of the housing is provided with a first toothed wall adapted to the first planetary gear set and a second toothed wall adapted to the second planetary gear set. The first planetary gear set is drivenly connected to the main shaft of the motor. The first planetary carrier is connected to the first planetary gear set and drivenly connected to the second planetary gear set. The second planetary carrier is connected to the second planetary gear set and connected to the output shaft.

[0010] Furthermore, the first planetary gear set includes three planetary gears, the three planetary gear arrays surrounding and meshing with the main shaft of the motor, and connected to the planetary holes of the first planetary carrier by pins.

[0011] Furthermore, the second planetary gear set includes four planetary gears that surround and mesh with the gear shaft of the first planetary carrier and are connected to the planetary bore of the second planetary carrier by pins.

[0012] Furthermore, a first spacer is provided between the first planetary gear set and the housing, the first spacer axially abutting against the first planetary gear set, and a second spacer is provided between the second planetary gear set and the first planetary carrier, the second spacer axially abutting against the second planetary gear set.

[0013] Furthermore, a second bearing is provided between the second planetary carrier and the box cover.

[0014] Furthermore, the transmission assembly includes a torsion spring, the output shaft, and the ball bearing. The torsion spring is sleeved on the planetary carrier, with one end abutting against the stepped surface of the output shaft and the other end abutting against the end face of the stepped hole in the housing cover. The output shaft is connected to the second planetary carrier in a transmission connection.

[0015] Furthermore, the second planetary carrier includes an integrally formed planetary disk and a shaft, the shaft having a central stepped bore and a radially open notch, the output axis extending into the central stepped bore and having a transmission protrusion adapted to the notch.

[0016] Furthermore, the center of the cover is through, and from top to bottom it includes a first bearing groove, a stepped hole and a second bearing groove. The ball bearing is disposed in the first bearing groove, the torsion spring is disposed in the stepped hole and the first bearing is disposed in the second bearing groove.

[0017] The beneficial effects of this invention are as follows: The outer shell is formed by bending and continuous mortise and tenon joints from a single piece of sheet metal, resulting in a seamless axial structure. Furthermore, the continuous mortise and tenon joints allow for better engagement between the riveted protrusions and the slots. The third limiting protrusion at the lower end of the motor engages with the second limiting groove at the lower end of the outer shell, while the first limiting protrusion of the housing and the second limiting protrusion of the cover engage with the first limiting groove at the upper end of the outer shell. Both ends of the housing are limited, ensuring a stable connection. The ball bearing at the cover is connected to the output shaft using a reverse riveting method, which provides a more stable connection, smaller clearance, and lower noise compared to using a snap ring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of a gearbox motor according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of a gearbox motor according to an embodiment of the present invention;

[0020] Figure 3 This is an exploded structural diagram of a gearbox motor according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of a gearbox motor housing according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of a gearbox motor according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the housing of a gearbox motor according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the housing of a gearbox motor according to an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of a gearbox motor cover according to an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the cover of a gearbox motor according to an embodiment of the present invention from another direction.

[0027] Label Explanation:

[0028] 100. Motor; 110. Spindle; 120. First bearing; 130. Rear end cover;

[0029] 131. Third limiting protrusion; 140. Terminal assembly; 150. Buffer block; 200. Gearbox;

[0030] 210. Housing; 211. Slot; 212. First limiting protrusion; 213. Bearing chamber;

[0031] 214. Elastic hook; 215. First toothed wall; 216. Second toothed wall; 221. First planetary gear set;

[0032] 222. First planetary carrier; 223. Second planetary gear set; 224. Second planetary carrier;

[0033] 225. First meson; 226. Second meson; 227. Second bearing; 231. Torsion spring;

[0034] 232. Output shaft; 233. Ball bearing; 240. Case cover; 241. Second limiting protrusion;

[0035] 242. First bearing groove; 243. Stepped hole; 244. Second bearing groove; 300. Housing;

[0036] 310. Continuous mortise and tenon structure; 320. Riveted protrusion; 330. First limiting groove;

[0037] 340. Second limiting groove. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description of a gearbox motor according to the present invention, in conjunction with the accompanying drawings and embodiments, is provided. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] Please refer to Figures 1-9 A gearbox 200 and a motor 100, comprising:

[0040] Motor 100;

[0041] Gearbox 200 includes housing 210, transmission assembly, transmission assembly and cover 240. The transmission assembly and transmission assembly are disposed inside housing 210. Housing 210 is connected to cover 240. Transmission assembly is connected to motor 100. Transmission assembly is connected to transmission assembly. Cover 240 is provided with connection hole for transmission assembly to connect to the outside. Transmission assembly includes output shaft 232. Ball bearing 233 is provided between output shaft 232 and cover 240. Output shaft 232 is connected to ball bearing 233 by riveting.

[0042] The outer shell 300 is formed by bending a single piece of material and connecting the two ends with continuous tenon and mortise joints. Several riveting protrusions 320 are provided on the inner wall of the cylinder. The box body 210 is provided with a slot 211 that matches the riveting protrusions 320. Several upward-opening first limiting grooves 330 are provided at the upper end of the outer shell 300. The box body 210 is provided with a first limiting protrusion 212 that matches the first limiting groove 330. The box cover 240 is provided with a second limiting protrusion 241 that matches the first limiting groove 330. Several downward-opening second limiting grooves 340 are provided at the lower end of the outer shell 300. The lower end of the motor 100 is provided with a third limiting protrusion 131 that matches the second limiting groove 340.

[0043] The outer casing 300 is formed from a single piece of sheet metal through continuous bending and tenon joints, resulting in a seamless axial structure. The continuous tenon joints also allow the riveting protrusion 320 to better engage with the slot 211. The third limiting protrusion 131 at the lower end of the motor 100 engages with the second limiting groove 340 at the lower end of the outer casing 300. The first limiting protrusion 212 of the housing 210 and the second limiting protrusion 241 of the cover 240 engage with the first limiting groove 330 at the upper end of the outer casing 300. Both ends of the housing 210 are limited, ensuring a stable connection. The ball bearing 233 at the cover 240 is connected to the output shaft 232 using a reverse riveting method, which provides a more stable connection, smaller clearance, and lower noise compared to using a snap ring.

[0044] Continuous mortise and tenon joints distribute stress across the entire edge, resulting in high stability and resistance to deformation and breakage. Typically, for uniform stress distribution and aesthetic appeal, one or more identical patterns can be continuously extended to form a continuous mortise and tenon structure 310. Please refer to... Figure 1 and Figure 6 One of the protrusions is a large protrusion, and the other side has small protrusions on both sides of the large protrusion. The three protrusions and the matching grooves extend in a continuous array to form a continuous mortise and tenon structure 310.

[0045] Preferably, the first limiting groove 330 is arranged in a ring array with multiple grooves, and the first limiting protrusion 212 and the second limiting protrusion 241 are arranged correspondingly.

[0046] Specifically, the first limiting groove 330 is a T-shaped groove, the first limiting protrusion 212 is a cuboid, and the second limiting protrusion 241 is a short T-shaped groove. The first limiting protrusion 212 and the second limiting block are combined and adapted to the first limiting groove 330.

[0047] Please refer to Figure 1 and Figure 4The second limiting groove 340 is adapted to the lower end of the motor 100, requiring adaptation to the third limiting protrusion 131 on the rear end cover 130 of the motor 100, the terminal assembly 140 of the motor 100, and the buffer block 150 used for buffering at the rear end cover 130. When a third limiting protrusion 131 contains both a third limiting protrusion 131 and a buffer block 150, a stepped groove structure is generally adopted. The buffer block 150 is generally located in the narrower inner groove, and the third limiting protrusion 131 is located in the wider outer groove. Typically, the buffer block 150 can be partially located inside the outer casing 300 and partially protruding into the second limiting groove 340. The buffer block 150 is generally made of an elastic material, such as rubber, and has a buffering function. Understandably, the buffer block 150 is generally used to protect the circuit board and other circuit components of the motor 100, i.e., it is set around the circuit board.

[0048] Please refer to Figure 2 and Figure 7 A first bearing 120 is fitted onto the main shaft 110 of the motor 100. A bearing chamber 213 is located inside the housing 210. Within the bearing chamber 213, elastic hooks 214 are arranged in a circular array, along with space for the elastic hooks 214 to deform. The hooks of the elastic hooks 214 engage with the bearing chamber 213 to restrict the axial movement of the first bearing 120. The elastic hooks 214 not only restrict the axial movement of the first bearing 120 but also radially clamp it, providing a certain degree of cushioning and reducing noise.

[0049] Please refer to Figure 2 , Figure 3 and Figure 5 The transmission assembly includes a first planetary gear set 221, a first planetary carrier 222, a second planetary gear set 223, and a second planetary carrier 224. The inner wall of the housing 210 has a first toothed wall 215 adapted to the first planetary gear set 221 and a second toothed wall 216 adapted to the second planetary gear set 223. The first planetary gear set 221 is drive-connected to the main shaft 110 of the motor 100. The first planetary carrier 222 connects to the first planetary gear set 221 and is drive-connected to the second planetary gear set 223. The second planetary carrier 224 connects to the second planetary gear set 223 and is connected to the output shaft 232. Generally, the number of planets in the second planetary gear set 223 is greater than the number of planets in the first planetary gear set 221, i.e., reducing the speed and increasing the torque. Understandably, more planetary gear sets and planetary carriers can be added as needed to change the transmission ratio.

[0050] For preferred options, please refer to [the provided text]. Figure 3 The first planetary gear set 221 includes three planetary gears arranged in an array around the main shaft 110 of the meshing motor 100 and connected to the planetary bores of the first planetary carrier 222 via pins. It is understood that the planetary bores of the first planetary carrier 222 correspond to the three planetary gears of the first planetary gear set 221.

[0051] For preferred options, please refer to [the provided text]. Figure 3 The second planetary gear set 223 includes four planetary gears that surround and mesh with the gear shaft of the first planetary carrier 222 and are connected to the planetary bores of the second planetary carrier 224 via pins. The planetary bores of the second planetary carrier 224 correspond to the four planetary gears of the second planetary gear set.

[0052] Please refer to Figure 2 , Figure 3 and Figure 5 A first spacer 225 is provided between the first planetary gear set 221 and the housing 210, with the first spacer 225 axially abutting against the first planetary gear set 221. A second spacer 226 is provided between the second planetary gear set 223 and the first planetary carrier 222, with the second spacer 226 axially abutting against the second planetary gear set 223. The spacer reduces the axial clearance, thereby reducing noise generated by vibration.

[0053] Please refer to Figure 2 and Figure 3 A second bearing 227 is provided between the second planetary carrier 224 and the housing cover 240. The second bearing 227 is generally an oil-impregnated bearing.

[0054] Please refer to Figure 2 , Figure 3 and Figure 5 The transmission assembly includes a torsion spring 231, an output shaft 232, and a ball bearing 233. The torsion spring 231 is sleeved on the planetary carrier, with one end abutting against the stepped surface of the output shaft 232 and the other end abutting against the end face of the stepped hole 243 inside the housing cover 240. The output shaft 232 is connected to the second planetary carrier 224 for transmission. The torsion spring 231 provides a buffering effect to reduce noise.

[0055] Please refer to Figure 3 The second planetary carrier 224 includes an integrally formed planetary disk and a shaft. The shaft has a central stepped bore 243 and a radially open notch. The output shaft 232 extends into the central stepped bore 243 and is provided with a transmission protrusion that matches the notch. Please refer to... Figure 2 The connection between the output shaft 232 and the second planetary carrier 224 can generally be secured with a nut. Understandably, the shaft of the first planetary carrier 222 is a gear shaft, which meshes with the second planetary gear set 223 for transmission.

[0056] Please refer to Figure 8 and Figure 9 The center of the cover 240 is through, and from top to bottom it includes a first bearing 120 groove, a stepped hole 243 and a second bearing 227 groove. The ball bearing 233 is arranged in the first bearing 120 groove, the torsion spring 231 is arranged in the stepped hole 243, and the first bearing 120 is arranged in the second bearing 227 groove.

[0057] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0059] In summary, the gearbox motor provided by this invention features a housing formed from a single piece of sheet metal through continuous bending and tenon joints, resulting in a seamless axial structure. The continuous tenon joints allow for better engagement of the riveted protrusions with the retaining grooves. The third limiting protrusion at the lower end of the motor engages with the second limiting groove at the lower end of the housing, while the first limiting protrusion of the housing and the second limiting protrusion of the housing cover engage with the first limiting groove at the upper end of the housing. Both ends of the housing are thus limited, ensuring a stable connection. The ball bearing at the housing cover is connected to the output shaft using a reverse riveting method, which is more stable, has smaller clearances, and lower noise compared to using a retaining spring.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gearbox motor, characterized in that, include: Electric motor; A gearbox includes a housing, a transmission assembly, a drive assembly, and a cover. The transmission assembly and the drive assembly are disposed within the housing. The housing is connected to the cover. The transmission assembly is driven by a motor. The drive assembly is connected to the transmission assembly. The cover has a connection hole for the drive assembly to connect to the outside. The drive assembly includes an output shaft. A ball bearing is provided between the output shaft and the cover. The output shaft is connected to the ball bearing by a reverse riveting method. The outer shell is formed by bending a single piece of material and continuously mortising and tenoning the two ends to form a cylindrical body. Several riveted protrusions are provided on the inner wall of the cylindrical body. The housing has slots that mate with the riveted protrusions. Several upward-opening first limiting grooves are provided at the upper end of the outer shell. The housing has first limiting protrusions that mate with the first limiting grooves. The housing cover has second limiting protrusions that mate with the first limiting grooves. Several downward-opening second limiting grooves are provided at the lower end of the outer shell. A third limiting protrusion that mates with the second limiting grooves is provided at the lower end of the motor.

2. A gearbox motor according to claim 1, characterized in that, The main shaft of the motor is fitted with a first bearing, and the housing is provided with a bearing chamber. The bearing chamber is provided with elastic hooks arranged in a circular array and a space for the elastic hooks to deform. The hook part of the elastic hook cooperates with the bearing chamber to restrict the axial movement of the first bearing.

3. A gearbox motor according to claim 2, characterized in that, The transmission assembly includes a first planetary gear set, a first planetary carrier, a second planetary gear set, and a second planetary carrier. The inner wall of the housing is provided with a first toothed wall adapted to the first planetary gear set and a second toothed wall adapted to the second planetary gear set. The first planetary gear set is driven to the main shaft of the motor. The first planetary carrier is connected to the first planetary gear set and driven to the second planetary gear set. The second planetary carrier is connected to the second planetary gear set and to the output shaft.

4. A gearbox motor according to claim 3, characterized in that, The first planetary gear set includes three planetary gears, which are arranged in an array around the main shaft of the motor and connected to the planetary bore of the first planetary carrier by pins.

5. A gearbox motor according to claim 3, characterized in that, The second planetary gear set includes four planetary gears that surround the gear shaft that meshes with the first planetary carrier and are connected to the planetary bore of the second planetary carrier by pins.

6. A gearbox motor according to claim 3, characterized in that, A first spacer is provided between the first planetary gear set and the housing, and the first spacer abuts axially against the first planetary gear set. A second spacer is provided between the second planetary gear set and the first planetary carrier, and the second spacer abuts axially against the second planetary gear set.

7. A gearbox motor according to claim 3, characterized in that, A second bearing is provided between the second planetary carrier and the box cover.

8. A gearbox motor according to claim 3, characterized in that, The transmission assembly includes a torsion spring, the output shaft, and the ball bearing. The torsion spring is sleeved on the planetary carrier. One end of the torsion spring abuts against the stepped surface of the output shaft, and the other end abuts against the end face of the stepped hole in the housing cover. The output shaft is connected to the second planetary carrier in a transmission connection.

9. A gearbox motor according to claim 8, characterized in that, The second planetary carrier includes an integrally formed planetary disk and a shaft. The shaft has a central stepped hole and a radially open notch. The output shaft extends into the central stepped hole and is provided with a transmission protrusion adapted to the notch.

10. A gearbox motor according to claim 8, characterized in that, The center of the cover is open, and from top to bottom it includes a first bearing groove, a stepped hole and a second bearing groove. The ball bearing is disposed in the first bearing groove, the torsion spring is disposed in the stepped hole and the first bearing is disposed in the second bearing groove.

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