Speed change device

Abstract

The utility model provides a speed change device, and relates to the technical field of transmission devices. Comprising a motor, a transmission and a driving box which are sequentially connected. Multiple stages of transmission gear sets meshed with one another are arranged in the transmission. A rotor shaft of the motor is provided with a driving gear which is meshed with a transmission gear set at the input end of the transmission; an output shaft of the transmission is connected to a worm in the driving box; the worm is meshed with the output gear; teeth on the output gear are helical teeth, a middle shaft is an output shaft of the speed change device, and the output shaft extends out of the driving box. The worm in the driving box is matched with the output gear, the reverse self-locking function is achieved, no extra device is needed for self-locking, reliable operation is achieved, the output gear is arranged to be oblique teeth, large noise cannot be generated between the gears due to too large gaps, the structure is simplified, cost is reduced, and the service life of the gear is prolonged. And noise generated during operation can be reduced, and the good market prospect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission devices, in particular to a speed change device. Background Art

[0002] The transmission, as a commonly used transmission device, is very important in industry and production life. For example, the gearbox of a car and the reduction device of engineering equipment are all transmission devices. They change the speed and output force by changing the transmission torque to adapt to different applications.

[0003] At present, the transmission device is generally driven directly by a gear set or by a gear set in conjunction with other transmission components. Usually, the following problems exist. First, the output end can usually reversely drive the output position, which may cause the input end to be easily reversely driven when the operation is obstructed or encounters a reverse driving torque, causing damage to the input end. Moreover, due to the large gear gap, there will also be a large noise during transmission, which has an adverse effect on the use environment. Therefore, the utility model proposes a transmission device to at least partially solve the problems that may exist in the prior art. Utility Model Content

[0004] In order to overcome the above problems or at least partially solve the above problems, an embodiment of the utility model provides a speed change device.

[0005] The embodiment of the utility model is achieved as follows:

[0006] The embodiment of the present application provides a speed change device, comprising:

[0007] A motor, a transmission and a drive box connected in sequence;

[0008] The transmission is provided with a multi-stage mutually meshing transmission gear set; the rotor shaft of the motor is provided with a driving gear, and the driving gear is meshed with the transmission gear set at the input end of the transmission;

[0009] The output shaft of the transmission is connected to a worm in the drive box; the worm meshes with an output gear; the teeth on the output gear are helical, and the shaft is the output shaft of the transmission, and the output shaft extends out of the drive box.

[0010] In some embodiments of the present invention, the transmission includes a housing;

[0011] The inner periphery of the housing is provided with a gear ring; the cavity inside the gear ring is provided with multiple sets of planetary gear assemblies;

[0012] The planetary gear assembly comprises a gear plate; one side of the gear plate is provided with a sun gear, and the other side of the gear plate is provided with a planetary gear; the planetary gear is meshed with the ring gear; the sun gear of the planetary gear assembly of the rear stage is meshed with the planetary gear of the planetary gear assembly of the front stage;

[0013] The rotor of the motor is connected to the sun gear, which is meshed with the planetary gear closest to the motor; the sun gear closest to the drive box is connected to the worm.

[0014] In some embodiments of the present invention, the ring gear, the sun gear and the planetary gear are all made of plastic.

[0015] In some embodiments of the present invention, the teeth on the ring gear, the sun gear and the planetary gear are all helical teeth.

[0016] In some embodiments of the present invention, a detachable cover is provided on one side of the drive box.

[0017] In some embodiments of the present invention, three planetary gears are arranged on the gear plate in an equilateral triangular distribution, or four planetary gears are arranged in a square distribution.

[0018] In some embodiments of the present invention, through holes are evenly spaced between the planetary gears on the gear plate.

[0019] In some embodiments of the present invention, 4 to 8 sets of planetary gear assemblies are provided in the transmission.

[0020] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0021] Through the motor, transmission and drive box connected in sequence; the transmission is provided with a multi-stage mutually meshing transmission gear set; the rotor shaft of the motor is provided with a driving gear, and the driving gear is meshed with the transmission gear set at the input end of the transmission; the output shaft of the transmission is connected to the worm in the drive box; the worm is meshed with the output gear; the teeth on the output gear are helical teeth, and the middle axis is the output shaft of the speed change device, and the output shaft extends out of the drive box. By the above-mentioned worm in the drive box and the output gear, the reverse self-locking function is realized, and no additional device is required for self-locking, and reliable operation is achieved. By setting the output gear as helical teeth, it has a larger contact surface to make the gear gap smaller, so that the gears will not generate large noise due to excessive gaps. It not only simplifies the structure and reduces costs, but also reduces the noise generated during operation, and has a good market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a speed change device provided in one embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the planar structure of a speed change device provided in one embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the internal structure of a transmission of a speed change device provided in one embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the gear plate and planetary gear structure of a speed change device provided in one embodiment of the utility model;

[0027] Figure 5 The present invention is a schematic diagram of a gear plate and a sun gear structure of a speed change device provided in one embodiment of the present invention.

[0028] In the figure: 100, motor; 200, transmission; 300, drive box; 201, housing; 202, ring gear; 203, gear plate; 204, sun gear; 205, planetary gear; 206, through hole; 301, output shaft; 302, output gear; 303, worm. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Example 1

[0031] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] Please refer to Figures 1 to 5As shown, an embodiment of the utility model provides a speed change device, which includes: a motor 100, a transmission 200 and a drive box 300 connected in sequence; the transmission 200 is provided with a multi-stage mutually meshing transmission gear set; the rotor shaft of the motor 100 is provided with a driving gear, and the driving gear is meshed with the transmission gear set at the input end of the transmission 200; the output shaft of the transmission 200 is connected to a worm 303 in the drive box 300; the worm 303 is meshed with an output gear 302; the teeth on the output gear 302 are helical teeth, and the middle axis is the output shaft 301 of the speed change device, and the output shaft 301 extends out of the drive box 300.

[0033] In this embodiment, through the worm 303 in the drive box 300, when the motor 100 drives the transmission 200 and changes the speed output by the motor 100, the worm 303 is driven to rotate through the transmission 200, and the worm 303 is provided with helical teeth similar to threads, and the output gear 302 is also correspondingly provided with helical teeth. Compared with the flat teeth of the helical output gear 302, the teeth on the worm 303 and the teeth on the output gear 302 have a larger contact surface when meshing, making the gear gap smaller, so that the gears will not generate a large noise due to the large gap, and the meshing of the worm 303 and the output gear 302 is In combination, it also has a reverse self-locking function, that is, the rotation of the worm 303 can drive the above-mentioned output gear 302, while the above-mentioned output gear 302 cannot drive the above-mentioned worm 303 to rotate, and the output gear 302 connected to the output shaft 301 is blocked by the teeth on the worm 303, so that it cannot be driven to rotate by the output shaft 301 and the output gear 302, thereby realizing the reverse self-locking function, without the need for self-locking through additional devices, and realizing reliable operation. In addition, through the above-mentioned worm 303 and the output gear 302 relative to the linear transmission, it can also change the direction of transmission, so that the output direction of the motor 100 is different from the direction of the speed change device.

[0034] It should be noted that although the locking of the speed change device can be achieved by adding additional devices, for example, by adding a locking device through a sensor, it can only be locked when there is no power output. When the reverse force is large (the output shaft is subject to resistance to reverse rotation), since the equipment cannot be locked during operation, reverse drive is likely to occur, causing damage to the equipment. The above-mentioned worm 303 structure and the above-mentioned output gear 302 enable it to be driven only by the front end and self-lock in the reverse direction, thereby ensuring the stability and service life of the motor 100 and the transmission 200.

[0035] Example 2

[0036] The utility model embodiment provides a speed change device, wherein, referring to Figures 3 to 5As shown, the transmission 200) includes a housing 201; a ring gear 202 is provided on the inner periphery of the housing; a plurality of sets of planetary gear assemblies are provided in the cavity within the ring gear 202; the planetary gear assembly includes a gear plate 203; a sun gear 204 is provided on one side of the gear plate 203, and a planetary gear 205 is provided on the other side thereof; the planetary gear 205 is meshed with the ring gear 202; the sun gear 204 of the planetary gear assembly of the rear stage is meshed with the planetary gear 205 of the planetary gear assembly of the front stage; the rotor of the motor 100 is high energy - the sun gear 204, which is meshed with the planetary gear 205 closest to the motor 100; the sun gear 204 closest to the drive box 300 is connected to the worm 303.

[0037] In this embodiment, by adopting a planetary gear assembly, the planetary gear assembly can achieve multiple speed gears by combining different gear ratios, providing a wider speed range while maintaining high mechanical efficiency. Secondly, multiple speed gears can be achieved by combining different gear ratios, providing a wider speed range while maintaining high mechanical efficiency. In addition, the sun gear 204, planetary gear 205 and ring gear 202 in the above-mentioned planetary gears can participate in power transmission at the same time, and the torque distribution is relatively uniform, which reduces vibration and noise, and can further reduce the noise of the speed change device.

[0038] As an example, the transmission 200 can be used as a reducer by setting the diameter of the solar energy 204 to be smaller than the diameter of the planetary gear 205. The large gear is driven by the small gear and the transmission is combined through multiple groups, thereby reducing the output speed, but increasing the output force accordingly. Since the planetary gear assembly can be increased accordingly, only a sufficiently long transmission 200 housing needs to be used.

[0039] As a preferred embodiment, the ring gear 202, the sun gear 204 and the planetary gear 205 are all made of plastic, and the teeth on the ring gear 202, the sun gear 204 and the planetary gear 205 are all helical teeth. The ring gear 202, the sun gear 204 and the planetary gear 205 are made of plastic and are all arranged as helical teeth.

[0040] The helical gear ring 202, the sun gear 204 and the planetary gear 205 provide a larger contact surface when the gears mesh with each other; the larger contact surface makes the load distribution between the gear teeth more uniform, and the uniform load distribution can reduce the stress concentration on the gear surface, thereby reducing the noise. On the other hand, the larger contact surface can reduce the impact and vibration during the meshing process, which can promote a smoother movement between the gears. The smooth movement can reduce friction and vibration, thereby further reducing the noise. The sun gear 204, the planetary gear 205 and the ring gear 202 are all made of plastic. For example, the above gears can be made of PEK engineering plastics to have better strength. In addition, the teeth on the sun gear 204, the planetary gear 205 and the ring gear 202 are all helical teeth; the gears are made of plastic material, and the teeth are set as helical teeth, which further reduces the running noise. Compared with the gears made of metal materials, the gears made of plastic material can further reduce the cost.

[0041] It should be noted that the above-mentioned motor 100, as a power output source, can be a DC motor, an AC motor, or a variable frequency motor, and only needs to be connected to a corresponding drive circuit.

[0042] Example 3

[0043] The embodiment of the utility model provides a speed change device, wherein a detachable cover is provided on one side of the drive box 300, which is convenient for disassembling the drive box 300, and the cover can be opened to add lubricant therein, so that the worm 303 and the output gear 302 can have a smaller friction force, thereby increasing the service life of the equipment; the planetary gears 205 on the gear plate 203 are arranged in three equal triangles, or in four squares, wherein, with reference to Figure 4 and Figure 5 As shown, through holes 206 are evenly spaced between the planetary gears 205 on the gear plate 203. The spaces where the planetary gears 205 and the sun gear 204 are located in the transmission 200 are kept connected through the multiple through holes 206, and the lubricating oil therein can penetrate the planetary gears 205 and the sun gear 204 at other positions through the through holes 206, so that the planetary gears 205 and the sun gear 204 therein are kept well lubricated. The lubricant can be a solid lubricant, for example, molybdenum disulfide solid lubricant can be filled therein, so as to reduce wear during operation and improve transmission efficiency.

[0044] As a preferred embodiment, the transmission 200 is provided with 4 to 8 sets of planetary gear assemblies, which can be set according to actual needs. For example, 6 sets of planetary gear assemblies can be set in the transmission 200, which can increase its output force when used as a reducer.

[0045] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. Although optional embodiments of the utility model embodiments have been described, once those skilled in the art know the basic creative concept, they can make additional changes and modifications to these embodiments. Therefore, the attached claims are intended to be interpreted as including optional embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0046] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0047] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. At the same time, for those skilled in the art, according to the principle and implementation method of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A speed change device, characterized in that: include: A motor (100), a transmission (200) and a drive box (300) connected in sequence; The transmission (200) is provided with a multi-stage mutually meshing transmission gear set; the rotor shaft of the motor (100) is provided with a driving gear, and the driving gear is meshed with the transmission gear set at the input end of the transmission (200); The output shaft of the transmission (200) is connected to a worm (303) in the drive box (300); the worm (303) is meshed with an output gear (302); the teeth on the output gear (302) are helical teeth, and the axis thereof is an output shaft (301) of the transmission, and the output shaft (301) extends out of the drive box (300).

2. The speed change device according to claim 1, characterized in that: The transmission (200) comprises a housing (201); A gear ring (202) is provided on the inner periphery of the housing; a cavity inside the gear ring (202) is provided with a plurality of sets of planetary gear assemblies; The planetary gear assembly comprises a gear plate (203); a sun gear (204) is provided on one side of the gear plate (203), and a planetary gear (205) is provided on the other side of the gear plate (203); the planetary gear (205) is meshed with the ring gear (202); the sun gear (204) of the planetary gear assembly at the rear stage is meshed with the planetary gear (205) of the planetary gear assembly at the front stage; The rotor of the motor (100) is high energy, and the sun gear (204) is meshed with the planetary gear (205) closest to the motor (100); the sun gear (204) closest to the drive box (300) is connected to the worm (303).

3. The speed change device according to claim 2, characterized in that: The ring gear (202), the sun gear (204) and the planetary gear (205) are all made of plastic.

4. The speed change device according to claim 2 or 3, characterized in that: The teeth on the ring gear (202), the sun gear (204) and the planetary gear (205) are all helical teeth.

5. The speed change device according to claim 1, characterized in that: A detachable cover plate is provided on one side of the driving box (300).

6. The speed change device according to claim 2, characterized in that: The planetary gears (205) on the gear plate (203) are arranged in three equal triangles or in four equal squares.

7. The speed change device according to claim 2 or 6, characterized in that: Through holes (206) are also arranged at equal intervals between the planetary wheels (205) on the gear plate (203).

8. The speed change device according to claim 1, characterized in that: The transmission (200) is provided with 4 to 8 sets of planetary gear assemblies.

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