Driving device and automobile

Abstract

The application discloses a driving device and a car, the driving device comprises a motor and a transmission mechanism, the motor comprises a stator, a rotor and a shell, the stator is fixedly connected in the shell, and the rotor is sleeved in the stator. The transmission mechanism comprises a cycloidal pin wheel, a cycloidal gear, a needle bearing and an output shaft, the cycloidal pin wheel is sleeved in the rotor, the needle bearing is arranged on the inner wall surface of the rotor, and the rotor transmits power to the cycloidal pin wheel through the needle bearing, so that the cycloidal pin wheel can swing relative to the shell. The cycloidal gear is sleeved in the cycloidal pin wheel, and the cycloidal gear has a tooth number difference between the outer gear and the inner gear of the cycloidal pin wheel, so that the inner gear of the cycloidal pin wheel is partially engaged with the outer gear of the cycloidal gear. The output shaft is sleeved in the cycloidal gear, and the output shaft is fixedly connected with the cycloidal gear. The transmission mechanism of the driving device is arranged in the rotor, so that the transmission mechanism does not occupy additional space, and therefore, the driving device has the advantages of small volume and simple structure.

Description

Technical Field

[0001] This invention relates to the automotive field, and more particularly to a drive system and an automobile. Background Technology

[0002] New energy vehicles represent the future trend of automotive development, and their driving range and passenger cabin noise are receiving significant attention. To maximize driving range and minimize cabin noise, automotive components require highly efficient, low-power, and low-noise drive systems. Currently, automotive components such as sunroofs, seats, window regulators, and windshield wipers utilize brushed motors and turbine-screw drives in their drive systems. Figure 1 As shown, its structure is generally as follows: a worm gear 20 is mounted on the output shaft of a horizontally mounted brushed motor 10. The rotation of the worm gear 20 drives a helical gear 30 to produce a speed reduction output. A gear is then mounted on the output shaft at the center of the helical gear 30 to drive a chain, which in turn pulls the load. This type of drive device uses a brushed motor 10 as its power source. Due to the presence of the commutator, the noise is generally high and difficult to optimize. The transmission mechanism of this drive device includes the worm gear 20, which has relatively low transmission efficiency, thus requiring higher motor power. Furthermore, the transmission of the worm gear 20 exerts axial thrust and pull on the motor shaft. Both the bearings of the motor itself and the bearings at the end of the worm gear 20 must be specially designed to resist the thrust and pull forces generated during operation, further increasing the complexity of the structure. Additionally, as... Figure 2 As shown, because the motor is located outside the reducer, the motor output shaft is perpendicular to the reducer output shaft, and the overall upper and lower mounting surfaces of the drive unit are uneven, the motor cannot be completely covered by the housing, which is detrimental to the motor's waterproof, dustproof, and insulation protection.

[0003] Therefore, existing automotive drive systems suffer from problems such as high noise, low transmission efficiency, large space occupation, and relatively complex structure. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of high noise, low transmission efficiency, large space occupation, and relatively complex structure of existing automobile drive devices.

[0005] To address the aforementioned problems, one embodiment of the present invention provides a driving device, including a motor and a transmission mechanism. The motor includes a stator, a rotor, and a housing. The stator is fixedly connected within the housing, and the rotor is fitted inside the stator. The transmission mechanism includes a cycloidal pinwheel, a cycloidal gear, a needle roller bearing, and an output shaft. The cycloidal pinwheel is fitted inside the rotor, and the needle roller bearing is disposed on the inner wall of the rotor. The rotor transmits power to the cycloidal pinwheel through the needle roller bearing, enabling the cycloidal pinwheel to oscillate relative to the housing. The cycloidal gear is fitted inside the cycloidal pinwheel and is configured as an external gear, while the cycloidal pinwheel is configured as an internal gear. There is a difference in the number of teeth between the external teeth of the cycloidal gear and the internal teeth of the cycloidal pinwheel, allowing the internal teeth of the cycloidal pinwheel to partially mesh with the external teeth of the cycloidal gear. The output shaft is fitted inside the cycloidal gear and is fixedly connected to the cycloidal gear.

[0006] The drive device employing the above technical solution includes a cycloidal pinwheel, a cycloidal gear, a needle roller bearing, and an output shaft. The rotor rotates and transmits power to the cycloidal pinwheel via the needle roller bearing, allowing the cycloidal pinwheel to oscillate relative to the housing. The internal teeth of the cycloidal pinwheel mesh with the external teeth of the cycloidal gear, thus transmitting power to the cycloidal gear during oscillation. Furthermore, due to the difference in the number of teeth between the external teeth of the cycloidal gear and the internal teeth of the cycloidal pinwheel, the cycloidal gear can output torque through the output shaft, thereby completing the driving operation. The output shaft of the rotor and the output shaft of the transmission mechanism are the same, resulting in higher transmission efficiency compared to the existing technology where the motor output shaft and the worm gear transmission shaft are perpendicular. Moreover, since this drive device does not require a dedicated structure to resist the axial thrust and pull forces exerted by the worm gear transmission on the motor, it boasts a simple structure. Additionally, the transmission mechanism is located inside the rotor, eliminating the need for additional space and contributing to the drive device's smaller size. In addition, since the transmission mechanism of the drive device is located inside the rotor, the shape of the housing does not need to be designed according to the shape of the transmission mechanism and the connection position between the transmission mechanism and the motor. Therefore, the housing of the drive device can completely enclose the motor and the transmission mechanism, which facilitates the waterproof, dustproof and insulation protection of the drive device. Furthermore, the upper and lower mounting surfaces of the housing of the drive device are relatively flat, so the drive device is also easy to connect with other devices.

[0007] Another embodiment of the present invention provides a driving device, the housing including a cover and a body, the body having an internal cavity and an opening at one end, the stator, rotor, and transmission mechanism all being disposed within the cavity of the body, and the cover being detachably fixedly connected to the opening end of the body. A first shaft hole is provided at the other end of the body, and one end of an output shaft extends through the first shaft hole to the outside of the body.

[0008] Using the above technical solution, when the stator, rotor, or transmission mechanism is damaged and needs repair or replacement, the housing includes a cover and a body, and the cover is detachably fixed to the open end of the body, which facilitates the disassembly or installation of the housing by maintenance personnel, thereby facilitating the repair or replacement of damaged components inside the housing. A first shaft hole provided on the other end of the body allows one end of the output shaft to extend through the first shaft hole to the outside of the body, thereby transmitting power to other devices.

[0009] Another embodiment of the present invention provides a driving device in which multiple limiting pins are evenly arranged at intervals on the periphery of both ends of the cycloidal pinwheel. Limiting holes are provided on the cover and the body of the housing at positions corresponding to the limiting pins. The diameter of the limiting holes is larger than that of the limiting pins, so that the cycloidal pinwheel can swing along the inner wall of the limiting holes through the limiting pins.

[0010] Using the above technical solution, the cycloidal pinwheel can swing along the inner wall of the limiting hole through the limiting pin. Therefore, the cycloidal pinwheel can only change its center position during the swinging process and will not rotate itself.

[0011] Another embodiment of the present invention provides a driving device, wherein a second shaft hole is provided on the housing cover, and the other end of the output shaft is located in the second shaft hole. A first bearing and a second bearing are respectively sleeved on both ends of the output shaft, and the first bearing and the second bearing are respectively embedded in the first shaft hole and the second shaft hole.

[0012] By adopting the above technical solution, the first bearing and the second bearing provide support at both ends of the output shaft, while also reducing the friction between the output shaft and the first and second shaft holes during rotation, thereby further increasing the transmission efficiency of the drive device and reducing the friction noise between the output shaft and the first and second shaft holes.

[0013] Another embodiment of the present invention provides a driving device, which further includes a flat key. A first recess is provided on the inner sidewall of the cycloidal gear, and a second recess is provided on the output shaft at a position corresponding to the first recess. The two sides of the flat key are respectively disposed in the first recess and the second recess, so that the cycloidal gear is fixedly connected to the output shaft.

[0014] Using the above technical solution, a flat key is used to connect the cycloidal gear and the output shaft, thereby enabling the cycloidal gear to transmit power through the output shaft.

[0015] Another embodiment of the present invention provides a driving device, which further includes a retaining ring disposed on the output shaft at a position away from the rotor from the first bearing, and the retaining ring is located in the first shaft hole.

[0016] By adopting the above technical solution, the snap ring can restrict the first bearing from sliding outward, thereby preventing the cycloidal pinwheel, cycloidal gear, needle roller bearing and output shaft from shaking, thus improving the stability of the internal structural connection of the drive device.

[0017] Another embodiment of the present invention provides a driving device, which further includes a transmission gear. A snap-fit ​​portion is provided at one end of the output shaft that passes through a first shaft hole and extends to the outside of the housing. The transmission gear is fixedly connected to one end of the output shaft through the snap-fit ​​portion.

[0018] By adopting the above technical solution, the transmission gear can transmit the power transmitted by the output shaft to other components.

[0019] Another embodiment of the present invention provides a driving device, which further includes a sensor and a controller. Both the sensor and the controller are disposed within a housing. The sensor is used to detect the position of the rotor and transmit the rotor position information to the controller. The controller is used to receive the rotor position information and control the current direction of the stator according to the position information.

[0020] By adopting the above technical solution, the drive device detects the rotor position by setting up sensors and controls the direction of the stator current by setting up a controller, thereby controlling the rotor of the motor to rotate. Therefore, the motor of this drive device does not need to be equipped with brushes and a steering gear. During the motor rotation process, since the brushes are removed, the friction force is greatly reduced, thereby reducing friction noise, improving operating efficiency, and reducing operating energy consumption.

[0021] Another embodiment of the present invention provides a driving device, which further includes an adapter plate. One side of the adapter plate is fixedly connected to the end of the housing away from the opening, and the other side is provided with a mounting part.

[0022] By adopting the above technical solution, the adapter plate can facilitate the installation of the drive device on other devices, thereby improving the ease of installation of the drive device.

[0023] One embodiment of the present invention also provides an automobile including the above-described drive device.

[0024] By adopting the above technical solution, the transmission mechanism of the vehicle's drive unit is located inside the rotor, and the output shaft of the rotor and the output shaft of the transmission mechanism are the same. Therefore, compared with the existing motor and worm gear transmission devices, the transmission efficiency of this vehicle's drive unit is higher. Furthermore, the transmission mechanism of this vehicle's drive unit does not occupy additional space, thus giving it the advantages of smaller size and simpler structure. In addition, since the motor of this vehicle's drive unit does not require brushes and a steering gear, the friction force during motor rotation is greatly reduced due to the elimination of brushes, thereby reducing friction noise, improving operating efficiency, and lowering operating energy consumption. Therefore, this vehicle's drive unit also has the advantages of low noise and high operating efficiency.

[0025] The beneficial effects of this invention are:

[0026] The driving device provided by this invention includes a motor and a transmission mechanism. The transmission mechanism includes a cycloidal pinwheel, a cycloidal gear, a needle roller bearing, and an output shaft. The cycloidal pinwheel is sleeved inside the rotor of the motor, and the needle roller bearing is disposed on the inner wall of the rotor. The rotor transmits power to the cycloidal pinwheel through the needle roller bearing, allowing the cycloidal pinwheel to oscillate relative to the housing. The cycloidal gear is sleeved inside the cycloidal pinwheel and is configured as an external gear, while the cycloidal pinwheel is configured as an internal gear. There is a difference in the number of teeth between the external teeth of the cycloidal gear and the internal teeth of the cycloidal pinwheel, allowing the internal teeth of the cycloidal pinwheel to partially mesh with the external teeth of the cycloidal gear. The output shaft is sleeved inside the cycloidal gear and is fixedly connected to the cycloidal gear. The output shaft of the rotor of this driving device and the output shaft of the transmission mechanism are the same output shaft. Therefore, compared with the prior art where the output shaft of the motor and the output shaft of the worm gear transmission are perpendicular to each other, this driving device has higher transmission efficiency. Furthermore, since this drive unit does not require a dedicated structure to resist the axial thrust and pull forces exerted on the motor by the worm gear drive, it boasts a simple structure. Simultaneously, the transmission mechanism is located inside the rotor, eliminating the need for additional space and contributing to its compact size. Additionally, because the transmission mechanism is internal to the rotor, the housing shape does not need to be designed based on the transmission mechanism's shape or its connection point with the motor. Therefore, the housing can completely enclose the motor and transmission mechanism, facilitating waterproofing, dustproofing, and insulation protection. Moreover, the relatively flat upper and lower mounting surfaces of the housing facilitate connection to other devices.

[0027] Other features and corresponding beneficial effects of the present invention will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in the specification. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the internal structure of a car drive system in the prior art.

[0029] Figure 2 This is a schematic diagram of the external structure of a car drive system in the prior art.

[0030] Figure 3 An exploded view of the driving device provided in Embodiment 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of the overall structure of the driving device provided in Embodiment 1 of the present invention;

[0032] Figure 5 This is a schematic diagram of the housing of the driving device provided in Embodiment 1 of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10: Brushed motor;

[0035] 20: Worm gear;

[0036] 30: Helical gear;

[0037] 40: Stator;

[0038] 50: Rotor;

[0039] 60: Transmission mechanism;

[0040] 601: Cycloidal pinwheel; 6011: Limit pin;

[0041] 602: Cycloidal gear; 6021: First recess;

[0042] 603: Needle roller bearing;

[0043] 604: Output shaft; 6041: Second recess;

[0044] 70: Shell;

[0045] 701: Shell cover; 7011: Second shaft hole; 7012: Limiting hole;

[0046] 702: Housing body; 7021: First shaft hole; 7022: Limiting hole;

[0047] 80: First bearing;

[0048] 90: Second bearing;

[0049] 100: Snap ring;

[0050] 110: Flat key;

[0051] 120: Transmission gear;

[0052] 130: Sensor;

[0053] 140: Controller;

[0054] 150: Adapter board. Detailed Implementation

[0055] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0056] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0058] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0059] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0060] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0061] Example 1

[0062] This embodiment provides a driving device, such as Figure 3 and Figure 4 As shown, the device includes a motor and a transmission mechanism 60. The motor includes a stator 40, a rotor 50, and a housing 70. The stator 40 is fixedly connected inside the housing 70, and the rotor 50 is fitted inside the stator 40. The transmission mechanism 60 includes a cycloidal pinwheel 601, a cycloidal gear 602, a needle roller bearing 603, and an output shaft 604. The cycloidal pinwheel 601 is fitted inside the rotor 50, and the needle roller bearing 603 is disposed on the inner wall of the rotor 50. The rotor 50 transmits power to the cycloidal pinwheel 601 through the needle roller bearing 603, allowing the cycloidal pinwheel 601 to oscillate relative to the housing 70. The cycloidal gear 602 is fitted inside the cycloidal pinwheel 601 and is an external gear, while the cycloidal pinwheel 601 is an internal gear. There is a difference in the number of teeth between the external teeth of the cycloidal gear 602 and the internal teeth of the cycloidal pinwheel 601, so that the internal teeth of the cycloidal pinwheel 601 mesh with the external teeth of the cycloidal gear 602. The output shaft 604 is sleeved inside the cycloidal gear 602, and the output shaft 604 is fixedly connected to the cycloidal gear 602.

[0063] Specifically, the stator 40 can be fixedly connected to the housing 70 by riveting, snap-fitting or screwing, etc. The specific connection can be set according to the actual design and usage requirements. This embodiment does not make specific limitations in this regard.

[0064] More specifically, the needle roller bearing 603 is embedded in the inner wall of the rotor 50, which results in uneven thickness of the inner wall of the rotor 50.

[0065] More specifically, the axial dimension of the needle roller bearing 603 can be the same as, or larger than, or smaller than, the axial dimension of the cycloidal pinwheel 601. Preferably, to ensure that the rotor 50 can better transmit power to the cycloidal pinwheel 601 through the needle roller bearing 603, the axial dimension of the needle roller bearing 603 in this embodiment is the same as the axial dimension of the cycloidal pinwheel 601.

[0066] More specifically, the number of external teeth of the cycloidal gear 602 is 2-4 fewer than the number of internal teeth of the cycloidal pinwheel 601. The number of external teeth of the cycloidal gear 602 is 2, 3, or 4 fewer than the number of internal teeth of the cycloidal pinwheel 601. The specific number can be set according to actual design and usage requirements. This embodiment does not make specific limitations in this regard.

[0067] More specifically, the output shaft 604 and the cycloidal gear 602 can be connected by riveting, snap-fitting, welding, or they can be integrally formed. The specific connection can be set according to the actual design and usage requirements. This embodiment does not impose any specific limitations on this.

[0068] It should be noted that the transmission mechanism 60 of the drive device includes a cycloidal pinwheel 601, a cycloidal gear 602, a needle roller bearing 603, and an output shaft 604. The rotor 50 rotates and transmits power to the cycloidal pinwheel 601 through the needle roller bearing 603, allowing the cycloidal pinwheel 601 to oscillate relative to the housing 70. The internal teeth of the cycloidal pinwheel 601 mesh with the external teeth of the cycloidal gear 602, so the cycloidal pinwheel 601 can transmit power to the cycloidal gear 602 when it oscillates. Furthermore, due to the difference in the number of teeth between the external teeth of the cycloidal gear 602 and the internal teeth of the cycloidal pinwheel 601, the cycloidal gear 602 can output torque through the output shaft 604, thereby completing the driving operation. The output shaft 604 of the rotor 50 of this drive device and the output shaft 604 of the transmission mechanism 60 are the same output shaft 604. Therefore, compared with the prior art where the output shaft 604 of the motor and the output shaft 604 of the worm gear transmission are perpendicular to each other, the transmission efficiency of this drive device is higher. Furthermore, since this drive unit does not require a dedicated structure to resist the axial thrust and pull forces exerted on the motor by the worm gear transmission, it boasts a simple structure. Simultaneously, the transmission mechanism 60 is located inside the rotor 50, eliminating the need for additional space and contributing to its compact size. Moreover, because the transmission mechanism 60 is internal to the rotor 50, the shape of the housing 70 does not need to be designed based on the shape of the transmission mechanism 60 or its connection position with the motor. Therefore, the housing 70 can completely enclose the motor and transmission mechanism 60, facilitating waterproofing, dustproofing, and insulation protection. Additionally, the relatively flat upper and lower mounting surfaces of the housing 70 make it easy to connect to other devices.

[0069] Furthermore, this embodiment also provides a driving device, such as... Figure 3 and Figure 4 As shown, the housing 70 includes a cover 701 and a body 702. The body 702 has an internal cavity, and one end of the body 702 has an opening. The stator 40, rotor 50, and transmission mechanism 60 are all disposed within the cavity of the body 702, and the cover 701 is detachably fixed to the open end of the body 702. A first shaft hole 7021 is provided on the other end of the body 702, and one end of the output shaft 604 extends through the first shaft hole 7021 to the outside of the body 702.

[0070] Specifically, the cover 701 and the body 702 can be connected by screwing, snap-fitting, or other detachable fixing methods. Preferably, to make the connection between the cover 701 and the body 702 more secure, the cover 701 and the body 702 in this embodiment are connected by screwing.

[0071] More specifically, the cover 701 has multiple threaded holes on its periphery, and the body 702 also has multiple threaded holes at the corresponding positions of the cover 701. When it is necessary to connect the cover 701 to the body 702, a bolt can be passed through the threaded holes on both the cover 701 and the body 702 at the same time, and then a nut can be used to tighten it.

[0072] More specifically, the number of threaded holes provided on the periphery of the cover 701 can be 2, 3, 4, 5, etc., and correspondingly, the number of threaded holes provided on the body 702 at the corresponding positions of the cover 701 can be 2, 3, 4, 5, etc. The specific number can be set according to actual design and usage requirements, and this embodiment does not impose specific limitations on it.

[0073] More specifically, one end of the output shaft 604 is clearance-fitted with the first shaft hole 7021, which allows the output shaft 604 to rotate relative to the first shaft hole 7021.

[0074] It should be noted that when the stator 40, rotor 50, or transmission mechanism 60 is damaged and requires repair or replacement, the housing 70 includes a cover 701 and a body 702. The cover 701 is detachably fixed to the open end of the body 702, which facilitates the disassembly or installation of the housing 70 by maintenance personnel, thereby facilitating the repair or replacement of damaged components within the housing 70. The first shaft hole 7021 provided on the other end of the body 702 allows one end of the output shaft 604 to extend through the first shaft hole 7021 to the outside of the body 702, thereby transmitting power to other devices.

[0075] Furthermore, this embodiment also provides a driving device, such as... Figure 3 As shown, multiple limiting pins 6011 are evenly and spaced on the periphery of both ends of the cycloidal pinwheel 601. Limiting holes 7012 are provided on the cover 701 at positions corresponding to the limiting pins 6011, and limiting holes 7022 are provided on the body 702 at positions corresponding to the limiting pins 6011. The diameter of the limiting holes 7012 on the cover 701 and 7022 on the body 702 is larger than that of the limiting pins 6011, so that the cycloidal pinwheel 601 can swing along the inner sidewalls of the limiting holes 7012 on the cover 701 and 7022 on the body 702 through the limiting pins 6011 at both ends.

[0076] Specifically, the number of limiting pins 6011 provided on both ends of the cycloidal pinwheel 601 can be 2, 3, 4, 5, etc. Correspondingly, the number of limiting holes 7012 provided on the cover 701 at the position corresponding to the limiting pins 6011 and the number of limiting holes 7022 provided on the body 702 at the position corresponding to the limiting pins 6011 can be set to 2, 3, 4, 5, etc., respectively. The specific number can be set according to actual design and usage requirements; this embodiment does not impose specific limitations on this.

[0077] More specifically, the diameter of the limiting hole 7012 on the cover 701 and the limiting hole 7022 on the body 702 can be set between 2.5mm and 5mm, specifically 2.5mm, 3mm, 4.5mm, 5mm, etc., which can be set according to actual design and usage requirements. This embodiment does not make specific limitations on this.

[0078] It should be noted that the cycloidal pinwheel 601 can swing along the inner wall of the limiting hole 7012 on the cover 701 and the limiting hole 7022 on the body 702 via the limiting pin 6011. Therefore, the cycloidal pinwheel 601 can only change its center position during the swinging process, and it will not rotate itself.

[0079] Furthermore, this embodiment also provides a driving device, such as... Figure 3 and Figure 4 As shown, the cover 701 is provided with a second shaft hole 7011, and the other end of the output shaft 604 is located in the second shaft hole 7011. The two ends of the output shaft 604 are respectively fitted with a first bearing 80 and a second bearing 90, and the first bearing 80 and the second bearing 90 are respectively embedded in the first shaft hole 7021 and the second shaft hole 7011.

[0080] Specifically, the first bearing 80 and the second bearing 90 can be configured as deep groove ball bearings, sliding bearings, liquid-lubricated bearings, etc. Preferably, in order to achieve higher operating accuracy and a more compact structure for the drive device, the first bearing 80 and the second bearing 90 in this embodiment are configured as deep groove ball bearings.

[0081] It should be noted that the first bearing 80 and the second bearing 90 not only support the two ends of the output shaft 604, but also reduce the friction between the output shaft 604 and the first shaft hole 7021 and the second shaft hole 7011 when the output shaft 604 rotates, thereby further increasing the transmission efficiency of the drive device and reducing the friction noise between the output shaft 604 and the first shaft hole 7021 and the second shaft hole 7011.

[0082] Furthermore, this embodiment also provides a driving device, such as... Figure 4As shown, the drive device also includes a flat key 110. A first recess 6021 is provided on the inner sidewall of the cycloidal gear 602, and a second recess 6041 is provided on the output shaft 604 at a position corresponding to the first recess 6021. The two sides of the flat key 110 are respectively disposed in the first recess 6021 and the second recess 6041, so that the cycloidal gear 602 is fixedly connected to the output shaft 604.

[0083] Specifically, the two sides of the flat key 110 are respectively interference-fitted with the first recess 6021 and the second recess 6041, thereby making the cycloidal gear 602 fixedly connected to the output shaft 604.

[0084] It should be noted that the flat key 110 is used to connect the cycloidal gear 602 and the output shaft 604, so that the cycloidal gear 602 can transmit power through the output shaft 604.

[0085] Furthermore, this embodiment also provides a driving device, such as... Figure 4 As shown, the drive device also includes a retaining ring 100, which is disposed on the output shaft 604 at the end of the first bearing 80 away from the rotor 50, and the retaining ring 100 is located in the first shaft hole 7021.

[0086] It should be noted that the snap ring 100 can restrict the first bearing 80 from sliding outward, thereby preventing the cycloidal pinwheel 601, cycloidal gear 602, needle roller bearing 603 and output shaft 604 from shaking, so as to improve the stability of the internal structural connection of the drive device.

[0087] Furthermore, this embodiment also provides a driving device, such as... Figure 3 and Figure 4 As shown, the drive device also includes a transmission gear 120. A snap-fit ​​part is provided at one end of the output shaft 604 that passes through the first shaft hole 7021 and extends to the outside of the housing 70. The transmission gear 120 is fixedly connected to one end of the output shaft 604 through the snap-fit ​​part.

[0088] Specifically, the snap-fit ​​portion can be configured as a groove recessed inward along the circumference of the output shaft 604, and the central hole of the transmission gear 120 and the groove on the output shaft 604 are interference-fitted, so that the transmission gear 120 is fixedly connected to the output shaft 604. Alternatively, the snap-fit ​​portion can be a groove provided on the outer wall of the output shaft 604, and a groove is also provided on the central hole of the transmission gear 120 at a position corresponding to the groove on the outer wall of the output shaft 604, and the transmission gear 120 and the output shaft 604 are fixedly connected by a pin or a key. Preferably, to facilitate the installation of the transmission gear 120 and the output shaft 604, in this embodiment, the snap-fit ​​portion is configured as a groove recessed inward along the circumference of the output shaft 604, and the central hole of the transmission gear 120 and the groove on the output shaft 604 are interference-fitted, so that the transmission gear 120 is fixedly connected to the output shaft 604.

[0089] More specifically, the transmission gear 120 can be set as a standard gear or a helical gear, and its specific configuration can be set according to actual design and usage requirements. This embodiment does not impose any specific limitations on this.

[0090] It should be noted that the transmission gear 120 is configured to transmit the power transmitted by the output shaft 604 to other components.

[0091] Furthermore, this embodiment also provides a driving device, such as... Figure 3 and Figure 5 As shown, the drive device also includes a sensor 130 and a controller 140. Both the sensor 130 and the controller 140 are disposed inside the housing 70. The sensor 130 is used to detect the position of the rotor 50 and transmit the position information of the rotor 50 to the controller 140. The controller 140 is used to receive the position information of the rotor 50 and control the current direction of the stator 40 according to the position information.

[0092] Specifically, the sensor 130 and the controller 140 can be respectively disposed on the inner wall of the cover 701, or respectively disposed on the inner wall of the body 702. For example... Figure 3 and Figure 5 As shown, in this embodiment, both the sensor 130 and the controller 140 are disposed on the inner sidewall of the housing 702.

[0093] More specifically, sensor 130 is configured as a position sensor, and its model can be set to IFRM, IFFM, IARM, etc. The specific configuration can be determined according to actual design and usage requirements; this embodiment does not impose any specific limitations on it.

[0094] It should be noted that this drive device detects the position of the rotor 50 by setting up a sensor 130 and controls the current direction of the stator 40 by setting up a controller 140, thereby controlling the rotation of the motor rotor 50. Therefore, the motor of this drive device does not need to be equipped with brushes and a steering gear. During the motor rotation process, since the brushes are removed, the friction force is greatly reduced, thereby reducing friction noise, improving operating efficiency, and reducing operating energy consumption.

[0095] Furthermore, this embodiment also provides a driving device, such as... Figure 3 As shown, the drive device also includes an adapter plate 150, one side of which is fixedly connected to the end of the housing 702 away from the opening, and the other side is provided with a mounting part.

[0096] Specifically, the adapter plate 150 can be connected to the end of the housing 702 away from the opening by means of snap-fit, screw-fit, welding, etc. The specific connection can be set according to actual design and usage requirements, and this embodiment does not impose specific limitations on it.

[0097] More specifically, the mounting section can be configured as a snap-fit ​​component, snap-fit ​​hole, bolt hole, etc. Furthermore, the number of mounting sections can be set to 1, 2, 3, 4, etc. The specific number can be determined according to actual design and usage requirements; this embodiment does not impose specific limitations on this.

[0098] It should be noted that the adapter plate 150 facilitates the installation of the drive device on other devices, thereby improving the ease of installation of the drive device.

[0099] Example 2

[0100] This embodiment provides a vehicle, including the drive unit described in Embodiment 1, such as... Figures 3-5 As shown.

[0101] It should be noted that the transmission mechanism 60 of the vehicle's drive unit is located inside the rotor 50, and the output shaft 604 of the rotor 50 and the output shaft 604 of the transmission mechanism 60 are the same. Therefore, compared with the motor and worm gear transmission devices in the prior art, the transmission efficiency of this vehicle's drive unit is higher. Furthermore, the transmission mechanism 60 of this vehicle's drive unit does not occupy additional space, thus giving it the advantages of smaller size and simpler structure. In addition, since the motor of this vehicle's drive unit does not require brushes and a steering gear, the friction during motor rotation is greatly reduced due to the elimination of brushes, thereby reducing friction noise, improving operating efficiency, and lowering operating energy consumption. Therefore, this vehicle's drive unit also has the advantages of low noise and high operating efficiency.

[0102] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A driving device comprising a motor and a transmission mechanism, the motor comprising a stator, a rotor and a housing, the stator being fixedly connected in the housing, and the rotor being sleeved in the stator; characterized in that: the transmission mechanism comprises a cycloidal pin gear, a cycloidal gear, a needle bearing and an output shaft, the cycloidal pin gear being sleeved in the rotor, the needle bearing being arranged on the inner wall surface of the rotor, and the rotor transmitting power to the cycloidal pin gear through the needle bearing, so that the cycloidal pin gear can swing relative to the housing; the cycloidal gear is sleeved in the cycloidal pin gear, and the cycloidal gear is arranged as an external gear, the cycloidal pin gear is arranged as an internal gear, and the cycloidal gear has a tooth number difference with the internal gear of the cycloidal pin gear, so that the internal gear of the cycloidal pin gear is partially meshed with the external gear of the cycloidal gear; the output shaft is sleeved in the cycloidal gear, and the output shaft is fixedly connected with the cycloidal gear. The housing comprises a shell cover and a shell body, the inside of the shell body is a cavity, one end of the shell body is provided with an opening, the stator, the rotor and the transmission mechanism are arranged in the cavity of the shell body, and the shell cover is detachably fixedly connected to the opening end of the shell body; the other end of the shell body is provided with a first shaft hole, one end of the output shaft extends to the outside of the shell body through the first shaft hole. The two ends of the cycloidal pin gear are uniformly provided with a plurality of limiting pins on the circumferential side, the shell cover and the shell body are provided with limiting holes corresponding to the limiting pins, and the diameter of the limiting hole is larger than that of the limiting pin, so that the cycloidal pin gear can swing along the inner side wall of the limiting hole through the limiting pin.

2. The drive apparatus according to claim 1, wherein The shell cover is provided with a second shaft hole, and the other end of the output shaft is located in the second shaft hole; the two ends of the output shaft are respectively sleeved with a first bearing and a second bearing, and the first bearing and the second bearing are respectively embedded into the first shaft hole and the second shaft hole.

3. The drive apparatus according to claim 2, wherein The driving device further comprises a flat key; a first recess is arranged on the inner side wall of the cycloidal gear, a second recess is arranged on the output shaft corresponding to the first recess, and the flat key is arranged in the first recess and the second recess respectively, so that the cycloidal gear is fixedly connected to the output shaft.

4. The drive apparatus according to claim 3, wherein The driving device further comprises a snap spring, the snap spring is arranged on the output shaft at a position away from the rotor, and the snap spring is located in the first shaft hole. The driving device further comprises a transmission gear, one end of the output shaft extending to the outside of the shell through the first shaft hole is provided with a clamping part, and the transmission gear is fixedly connected to the one end of the output shaft through the clamping part.

5. The drive apparatus according to claim 4, wherein The driving device further comprises a sensor and a controller, the sensor and the controller are arranged in the housing, and the sensor is used for detecting the position of the rotor and transmitting the position information of the rotor to the controller.

6. The drive apparatus according to claim 5, wherein ​ 7. The drive apparatus according to claim 6, wherein ​ 8. Drive arrangement according to any one of claims 2-7, characterized in that ​ The controller is configured to receive the position information and control the current direction of the stator according to the position information.

9. The drive apparatus according to claim 8, wherein The driving device further comprises an adapter plate, one side of the adapter plate is fixedly connected to one end of the shell away from the opening, and the other side is provided with a mounting portion.

10. An automobile characterized by comprising: The driving device comprises the driving device according to any one of claims 1-9.

Images