Transmission and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a transmission and a vehicle, the transmission comprises a first wheel body and a second wheel body, one of the first wheel body and the second wheel body is a driving wheel, and the other is a driven wheel; a permanent magnet is arranged in the first wheel body, the second wheel body is of a squirrel-cage structure, and a matching air gap is formed between the circumferential surface of the first wheel body and the circumferential surface of the second wheel body. When one of the first wheel body and the second wheel body as a driving wheel rotates, the squirrel-cage structure of the second wheel body cuts a magnetic induction line of a magnetic field of the permanent magnet, so that the second wheel body is excited, torque transmission of the first wheel body and the second wheel body is realized through magnetic field coupling of the permanent magnet and the squirrel-cage structure, and torque transmission can be realized without direct contact. And a matching air gap is formed between the circumferential surface of the first wheel body and the circumferential surface of the second wheel body, so that the problems of abrasion and heating between the first wheel body and the second wheel body are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation tools, in particular to a transmission and a vehicle. Background Art

[0002] Through a given input torque and rotational speed, a speed change device can provide different output torques and rotational speeds.

[0003] Currently, there are forms such as gear stepped speed change, hydraulic continuously variable speed, and CVT steel belt speed change in transmissions. However, the above transmission forms have problems such as wear and heat generation. Content of the Utility Model

[0004] The utility model discloses a transmission and a vehicle, which are used to solve the problems of wear and heat generation in the transmission.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] In a first aspect, a transmission is provided. The transmission includes: a first wheel body and a second wheel body, one of the first wheel body and the second wheel body is a driving wheel, and the other is a driven wheel; a permanent magnet is provided in the first wheel body, the second wheel body has a squirrel-cage structure, and there is a mating air gap between the circumferential surfaces of the first wheel body and the second wheel body.

[0007] When one of the first wheel body and the second wheel body that serves as the driving wheel rotates, the squirrel-cage structure of the second wheel body cuts the magnetic induction lines of the magnetic field of the permanent magnet. Thus, the second wheel body is excited, and the torque transmission between the first wheel body and the second wheel body is realized through the magnetic field coupling of the permanent magnet and the squirrel-cage structure. Without direct contact, torque transmission can be achieved. There is a mating air gap between the circumferential surfaces of the first wheel body and the second wheel body, avoiding the problems of wear and heat generation between the first wheel body and the second wheel body.

[0008] Optionally, the permanent magnet can move in the first wheel body along a first direction and a second direction; the outer diameter of the first wheel body gradually decreases along the first direction, the outer diameter of the second wheel body gradually decreases along the second direction, and the first wheel body and the second wheel body are arranged along a third direction; wherein, the second direction is opposite to the first direction, and the third direction is perpendicular to the first direction.

[0009] Optionally, the first wheel body has a moving channel extending along the first direction, and the permanent magnet is slidably fitted in the moving channel.

[0010] Optionally, a soft magnetic structure is provided around the moving channel.

[0011] Optionally, the material of the soft magnetic structure is silicon steel.

[0012] Optionally, the soft magnetic structure is a silicon steel sheet, and a plurality of the silicon steel sheets are distributed at intervals around the moving channel, and a non-magnetic material is provided between the plurality of silicon steel sheets.

[0013] Optionally, along the first direction, the width of the mating air gap is uniform.

[0014] Optionally, both the first wheel body and the second wheel body are conical, and the generatrix of the first wheel body is parallel to the generatrix of the second wheel body.

[0015] Optionally, the width of the mating air gap is less than or equal to 2 mm.

[0016] In a second aspect, a vehicle is provided, and the vehicle includes the transmission according to any one of the above technical solutions.

[0017] The vehicle and the above transmission have the same advantages as compared with the prior art, and will not be described herein again. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the transmission in the first state provided by an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the transmission in the second state provided by an embodiment of the present application. Detailed Embodiments

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Reference Figure 1 and Figure 2 :

[0022] The transmission provided by the embodiment of the present application includes: a first wheel body 10 and a second wheel body 20, one of the first wheel body 10 and the second wheel body 20 is a driving wheel, and the other is a driven wheel. For example, in Figure 1 and Figure 2Among them, the first wheel body 10 is the driving wheel, the connected first transmission shaft a is the driving shaft, the second wheel body 20 is the driven wheel, and the connected second transmission shaft b is the driven shaft. However, it is not limited to this. Conversely, the first wheel body 10 can be the driven wheel, the connected first transmission shaft a can be the driven shaft, the second wheel body 20 can be the driving wheel, and the connected second transmission shaft b can be the driving shaft; a permanent magnet 12 is provided in the first wheel body 10, the second wheel body 20 has a squirrel-cage structure, and there is a mating air gap G between the circumferential surfaces of the first wheel body 10 and the second wheel body 20.

[0023] When one of the first wheel body 10 and the second wheel body 20 that is the driving wheel rotates, the squirrel-cage structure of the second wheel body 20 cuts the magnetic induction lines of the magnetic field of the permanent magnet 12. Thus, the second wheel body 20 is magnetized, and the torque transmission between the first wheel body 10 and the second wheel body 20 is achieved through the magnetic field coupling between the permanent magnet 12 and the squirrel-cage structure. Without direct contact, torque transmission can be realized. There is a mating air gap G between the circumferential surfaces of the first wheel body 10 and the second wheel body 20, which avoids the problems of wear and heat generation between the first wheel body 10 and the second wheel body 20. Thus, it is also beneficial to improve the transmission efficiency. Since the first wheel body 10 and the second wheel body 20 are in non-contact transmission, there is no wear and they have a long service life. And there is no need for lubrication and maintenance, which saves time and effort. The asynchronous speed transmission between the first wheel body 10 and the second wheel body 20 can play a role in shock protection and vibration reduction.

[0024] In a specific embodiment, the permanent magnet 12 can move in the first wheel body 10 along the first direction P1 and the second direction P2; the outer diameter of the first wheel body 10 gradually decreases along the first direction P1, the outer diameter of the second wheel body 20 gradually decreases along the second direction P2, and the first wheel body 10 and the second wheel body 20 are arranged along the third direction P3; wherein, the second direction P2 is opposite to the first direction P1, and the third direction P3 is perpendicular to the first direction P1. When the permanent magnet 12 axially moves in the first wheel body 10 along the first direction P1 and the second direction P2, the magnetic field coupling position 30 changes, and the radii of the first wheel body 10 and the second wheel body 20 change in opposite directions. For example, Figure 2 Compared with Figure 1 when the magnetic field coupling position 30 moves with the permanent magnet 12 towards the first direction P1, the outer diameter of the first wheel body 10 corresponding to the magnetic field coupling position 30 becomes smaller, the outer diameter of the second wheel body 20 becomes larger, and the transmission ratio changes. Thus, non-contact torque speed change is achieved. And the torque speed changes steplessly, and the transmission is smooth without jerks.

[0025] In a specific embodiment, the first wheel body 10 has a moving channel 11 extending along the first direction P1, and the permanent magnet 12 is slidably fitted in the moving channel 11. The permanent magnet 12 is limited by the moving channel 11 and can only axially move in the first direction P1 and the second direction P2, and the operation is stable and reliable. Moreover, the permanent magnet 12 and the moving channel 11 can have a matching non-circular structure, such as a square cross-section and a regular hexagon cross-section structure, to prevent the permanent magnet 12 from rotating relative to the inner wall of the moving channel 11.

[0026] In a specific embodiment, a soft magnetic structure 13 is provided around the moving channel 11 to transmit the magnetic field of the permanent magnet 12 to the squirrel-cage structure, which is beneficial for the squirrel-cage structure to cut the magnetic induction lines.

[0027] In a specific embodiment, the material of the soft magnetic structure 13 is silicon steel, and silicon steel has good magnetic field transmission characteristics.

[0028] In a specific embodiment, the soft magnetic structure 13 is a silicon steel sheet, and a plurality of silicon steel sheets are spaced around the moving channel 11, which can effectively transmit the magnetic field. The silicon steel sheets are beneficial for cost saving, and non-magnetic materials are provided between the plurality of silicon steel sheets to play a role in filling and supporting.

[0029] In a specific embodiment, along the first direction P1, the width of the mating air gap G is uniform, so as to avoid wear caused by too close distance at some positions and poor coupling effect and unfavorable control of the magnetic field coupling intensity due to too far distance at some positions due to the change of the size of the mating air gap G.

[0030] In a specific embodiment, both the first wheel body 10 and the second wheel body 20 are conical (such as a cone), and the generatrix of the first wheel body 10 is parallel to the generatrix of the second wheel body 20. However, the two are not limited to being conical, and can also be structures close to conical. The generatrices of the first wheel body 10 and the second wheel body 20 can be non-straight lines, such as convex or concave curves.

[0031] In a specific embodiment, the width of the mating air gap G is less than or equal to 2 mm. For example, it can be 2 mm, 1.9 mm, 1.8 mm, 1.7 mm, etc. If the mating air gap G is too large, it is not conducive to the magnetic field coupling between the permanent magnet 12 and the squirrel-cage structure. If the mating air gap G is too small, the first wheel body 10 and the second wheel body 20 are likely to contact each other during rotation and cause wear.

[0032] Based on the same inventive concept, the embodiment of the present application further provides a vehicle, and the vehicle includes the transmission provided in the above embodiment. For the beneficial effects of the vehicle, please refer to the relevant effect analysis of the above transmission.

[0033] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A transmission, characterized in that: include: A first wheel body and a second wheel body, wherein one of the first wheel body and the second wheel body is a driving wheel and the other is a driven wheel; A permanent magnet is arranged in the first wheel body, the second wheel body is in a squirrel cage structure, and a matching air gap is provided between the circumferential surface of the first wheel body and the circumferential surface of the second wheel body.

2. The transmission according to claim 1, characterized in that: The permanent magnet can move in the first wheel body along a first direction and a second direction; The outer diameter of the first wheel body gradually decreases along the first direction, the outer diameter of the second wheel body gradually decreases along the second direction, and the first wheel body and the second wheel body are arranged along the third direction; The second direction is opposite to the first direction, and the third direction is perpendicular to the first direction.

3. The transmission according to claim 2, characterized in that: The first wheel body has a moving channel extending along the first direction, and the permanent magnet is slidably fitted in the moving channel.

4. The transmission according to claim 3, characterized in that: A soft magnetic structure is arranged around the moving channel.

5. The transmission according to claim 4, characterized in that: The material of the soft magnetic structure is silicon steel.

6. The transmission according to claim 4, characterized in that: The soft magnetic structure is a silicon steel sheet, a plurality of the silicon steel sheets are spaced and distributed around the moving channel, and non-magnetic materials are arranged between the plurality of the silicon steel sheets.

7. The transmission according to claim 2, characterized in that: Along the first direction, the width of the matching air gap is uniform.

8. The transmission according to claim 7, characterized in that: The first wheel body and the second wheel body are both conical, and a generatrix of the first wheel body is parallel to a generatrix of the second wheel body.

9. The transmission according to claim 1, characterized in that: The width of the fitting air gap is less than or equal to 2 mm.

10. A vehicle, characterized in that: A transmission comprising the transmission described in any one of claims 1 to 9.

Images