Gear motor

Abstract

The utility model discloses a gear motor. Comprising a main gear arranged on a motor output shaft and driven by the motor output shaft to rotate; the gear ring is fixedly arranged at the end part of one end of the motor shell; the planetary gears are arranged between the gear ring and the main gear and are respectively meshed with the gear ring and the main gear; the planet carrier comprises a main frame body, a plurality of connectors arranged on the inner side of the main frame body and an output head arranged on the outer side of the main frame body, and the connectors are arranged on the corresponding planet gears in a penetrating mode so that the output head can be driven to rotate to output power through circumferential movement of the planet gears. The utility model has the advantages of compact structure, reasonable layout, smaller occupied space and more concentrated mass, and is favorable for improving the controllability of the electric vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a reduction motor. Background Art

[0002] A reduction motor refers to an integrated body of a reducer and a motor (motor). Such an integrated body is usually also called a gear motor or a gear motor.

[0003] In the existing common reduction motors, the position deviation between the motor output shaft and the output shaft after reduction is relatively large. For example, in the published patent document CN204992924U, the overall weight distribution is not balanced enough.

[0004] When applying this type of reduction motor to electric vehicles (such as electric off-road vehicles, electric motorcycles, etc.), it will lead to a reduction in the handling performance of the whole vehicle. Therefore, the applicant proposes this application. Content of the Utility Model

[0005] The utility model aims at the deficiencies in the prior art and provides a reduction motor.

[0006] To solve the above technical problems, the utility model is solved by the following technical solutions:

[0007] A reduction motor includes

[0008] A main gear, which is arranged on the motor output shaft and driven by it to rotate;

[0009] A tooth ring, which is fixedly arranged at one end of the motor housing;

[0010] A plurality of planetary gears, which are arranged between the tooth ring and the main gear and respectively mesh with the tooth ring and the main gear; and

[0011] A planetary carrier, which includes a main frame body, a plurality of connecting heads arranged inside the main frame body, and an output head arranged outside the main frame body. The connecting heads penetrate through the corresponding planetary gears to drive the output head to rotate and output power through the circumferential movement of the planetary gears.

[0012] In the above solution, preferably, the main gear is splined to the motor output shaft.

[0013] In the above solution, preferably, the main gear includes an extended convex ring, and the inner side of the planetary carrier includes a groove for accommodating the extended convex ring.

[0014] In the above solution, preferably, a bearing is arranged between the inner wall of the groove and the outer wall of the extended convex ring.

[0015] In the above solution, preferably, the tooth ring is fixedly arranged on the end cover of the motor housing.

[0016] In the above solution, preferably, the connecting head and the main frame body are integrally formed and / or the output head and the main frame body are integrally formed.

[0017] In the above solution, preferably, one or more bearings are arranged between the planet carrier and the end cover of the motor housing.

[0018] In the above solution, preferably, the number of the planet gears is five, and the number of the connecting heads is five and they are respectively inserted through the corresponding planet gears one by one.

[0019] In the above solution, preferably, a bearing is arranged between the planet gear and the connecting head.

[0020] The beneficial effects of the present utility model are as follows:

[0021] The structure of the present utility model is compact and the layout is reasonable, so that it occupies less space and the mass is more concentrated, which helps to improve the controllability of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the present utility model.

[0023] Figure 2 It is a schematic sectional view of the present utility model.

[0024] Figure 3 It is a schematic diagram of the present utility model in a disassembled state.

[0025] Figure 4 It is a schematic diagram of the cooperation state of the main gear, the planet gear and the planet carrier of the present utility model.

[0026] Figure 5 It is a schematic diagram of the planet carrier of the present utility model.

[0027] Figure 6 It is a schematic diagram of the main gear of the present utility model.

[0028] Figure 7 It is a schematic diagram of the main gear of the present utility model from another perspective. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present utility model will be further described in detail below in conjunction with the drawings and the specific embodiments:

[0030] Refer to Figures 1-7 , a speed reduction motor, including a main gear 1, a ring gear 2, a planet carrier 3 and a plurality of planet gears 4.

[0031] It should be noted that for the structure of the motor output shaft 5 in the speed reduction motor of the present application and how to realize the rotational output of the motor output shaft, reference can be made to the motor forms in the existing designs.

[0032] In this embodiment, a main gear 1 is assembled at the outer end of the motor output shaft 5. The main gear 1 is splined to the outer end of the motor output shaft 5 so that when the motor output shaft 5 rotates, it can drive the main gear 1 to rotate synchronously.

[0033] Furthermore, the main gear 1 includes an extended convex ring 11. The inner ring that is splined to the outer end of the motor output shaft 5 may include the inner ring of the extended convex ring 11, as Figure 6 , Figure 7 shown.

[0034] For the ring gear 2, it is fixedly arranged at one end of the motor housing 6, such as being fixedly arranged on the end cover of the motor housing 6. The ring gear 2 is annular and has teeth on its inner wall.

[0035] The main gear 1 is arranged at the center position or a position close to the center of the ring gear 2. The planetary gears 4 are arranged between the ring gear 2 and the main gear 1 and are respectively meshed with the ring gear 2 and the main gear 1, so that the ring gear 2, the main gear 1, and several planetary gears 4 are closely matched. When the main gear 1 rotates, the planetary gears 4 meshed with the main gear 1 can move circumferentially around the main gear 1 along the teeth of the ring gear 2.

[0036] The planet carrier 3 is used to cooperate with the planetary gears 4. In this embodiment, the planet carrier 3 includes a main frame body, several connecting heads 31 arranged inside the main frame body, and an output head 32 arranged outside the main frame body. As an option, the connecting heads 31 and the main frame body, and the output head 32 and the main frame body are integrally formed respectively.

[0037] Among them, the number and position of the connecting heads 31 correspond one by one to the number and position of the planetary gears 4. The connecting heads 31 are inserted into the center holes of the corresponding planetary gears 4. Thus, when the planetary gears 4 move circumferentially, they can drive the planet carrier 3 to make a rotational motion. Finally, the power of the motor output shaft 5 is output from the output head 32 on the planet carrier 3, and the output head 32 can be transmitted to the electric vehicle wheel in the form of a chain or a belt, etc.

[0038] Furthermore, the inner side of the planet carrier 3 may include a groove 33 for accommodating the extended convex ring, and corresponding bearings are arranged between the extended convex ring 11 and the inner wall of the groove 33 to improve the fitting tightness between the planet carrier 3 and the main gear 1, making the structure more compact while the power output is more stable.

[0039] At the same time, corresponding bearings can also be installed between the planet carrier 3 and the end cover of the motor housing 6 and between the planetary gears 4 and the connecting heads 31.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A speed reduction motor, characterized in that: including a main gear, which is disposed on the motor output shaft and driven to rotate by the motor output shaft; a ring gear, which is fixedly arranged at one end of the motor housing; a plurality of planetary gears, which are arranged between the ring gear and the main gear and respectively mesh with the ring gear and the main gear; and a planetary carrier, which includes a main frame body, a plurality of connectors arranged inside the main frame body, and an output head arranged outside the main frame body. The connectors are respectively inserted through the corresponding planetary gears, so as to drive the output head to rotate and output power through the circumferential movement of the planetary gears.

2. The speed reduction motor according to claim 1, wherein: The main gear is splined to the motor output shaft.

3. A speed reduction motor according to claim 1, characterized in that: The main gear includes an extended convex ring, and the inner side of the planetary carrier includes a groove for accommodating the extended convex ring.

4. The speed reduction motor according to claim 3, characterized in that: A bearing is arranged between the inner wall of the groove and the outer wall of the extended convex ring.

5. A speed reduction motor according to claim 1, characterized in that: The ring gear is fixedly arranged on the end cover of the motor housing.

6. A speed reduction motor according to claim 1, characterized in that: The connector and the main frame body are integrally formed and / or the output head and the main frame body are integrally formed.

7. A speed reduction motor according to claim 1 or 5 or 6, characterized in that: One or more bearings are arranged between the planetary carrier and the end cover of the motor housing.

8. A speed reduction motor according to claim 1, characterized in that: The number of the planetary gears is five, and the number of the connectors is five and are respectively inserted through the corresponding planetary gears one by one.

9. A speed reduction motor according to claim 1 or 8, characterized in that: A bearing is arranged between the planetary gear and the connector.

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