Miniaturized speed reducer

Abstract

The utility model relates to a miniaturized speed reducer, which belongs to the technical field of speed reducers and comprises a sun gear, a gear ring body, a transmission component and a speed reducer output shaft. One opening end of the gear ring body is fixed on the motor; the transmission assembly comprises at least four transmission discs, the at least four transmission discs are arranged in the gear ring body and provided with a plurality of planetary gears in a rotating mode, transmission gears are fixed to the at least three transmission discs close to the sun gear, and a transmission hole is formed in the transmission disc farthest away from the sun gear; an output shaft of the speed reducer is fixedly inserted into the transmission hole. According to the utility model, the sun gear and the transmission gear are respectively meshed with the adjacent planetary gears, so that a multi-stage planetary gear transmission structure can be formed between the output shaft of the motor and the output shaft of the speed reducer; the speed reducer is small in size, compact in structure, large in reduction ratio (1: 256), high in precision, good in rigidity, large in bearing capacity, high in efficiency, long in service life, low in noise, attractive in appearance and convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed reducer, especially relates to a miniaturized speed reducer. BACKGROUND

[0002] Speed reducer is an independent component composed of gear transmission, worm transmission and gear-worm transmission closed in rigid shell, mainly playing the role of matching rotating speed and transmitting torque between prime mover and working machine or actuator, and is widely used in modern machinery.

[0003] With the miniaturization and light weight of motor, the speed reducer is usually designed as worm gear transmission to reduce the volume of speed reducer and conform to the size change of motor. However, the transmission of worm gear is small and the stability is poor, which cannot provide large carrying capacity.

[0004] Therefore, how to design a miniaturized speed reducer with compact structure, large transmission ratio, high precision, good rigidity and large carrying capacity is a problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0005] The utility model provides a miniaturized speed reducer, solves the technical problem that the stability of existing miniaturized speed reducer is poor and does not provide large carrying capacity.

[0006] The utility model solves the technical problems above, and the technical scheme is as follows: a miniaturized speed reducer is installed on a motor and comprises a sun gear, a gear ring body, a transmission assembly, an end cover and a speed reducer output shaft,

[0007] The sun gear is sleeved on the output shaft of the motor; the gear ring body is sleeved on the outer circumferential side of the sun gear and is fixed on the motor at one open end; the transmission assembly comprises at least four transmission discs, the at least four transmission discs are arranged in the gear ring body along the axial direction of the gear ring body and a plurality of planetary gears are rotatably arranged on the disc surface close to the sun gear along the circumferential direction of the transmission disc, the plurality of planetary gears are all engaged with the internal teeth of the gear ring body, the plurality of planetary gears on the transmission disc closest to the sun gear are uniformly distributed on the outer circumferential side of the sun gear and are all engaged with the sun gear, the other disc surface of the at least three transmission discs close to the sun gear is all fixed with a transmission gear, the at least three transmission gears are all engaged with the plurality of planetary gears on the adjacent transmission disc, and the transmission hole is arranged on the transmission disc farthest from the sun gear; the end cover is arranged on the other open end of the gear ring body and is provided with a through hole in the middle; the speed reducer output shaft is rotatably connected in the through hole through a bearing and is inserted and fixed in the transmission hole in the gear ring body at one end and penetrates out of the through hole at the other end.

[0008] The beneficial effects of this utility model are:

[0009] 1. By using the sun gear and transmission gear to mesh with multiple planetary gears on the adjacent transmission disc, a multi-stage planetary gear transmission structure can be formed between the motor output shaft and the reducer output shaft, resulting in a miniaturized reducer that is small in size, compact in structure, has a large reduction ratio (1:256), high precision, good rigidity, large load capacity, high efficiency, long service life, low noise, beautiful appearance, and is easy to install.

[0010] 2. By stacking at least four transmission discs axially spaced within the gear ring body, the transmission disc closest to the sun gear is in contact with the sun gear, while the transmission disc furthest from the sun gear is fixed to the reducer output shaft. This prevents at least four transmission discs from shaking and improves the stability of the miniaturized reducer.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, each of the multiple planetary gears on at least four of the transmission discs is a single unit.

[0013] The further beneficial effect of adopting the above is that five planetary gears are evenly distributed on the outer periphery of the sun gear or transmission gear, which can improve the stability of the meshing between the sun gear or transmission gear and the planetary gears, and also improve the reduction ratio.

[0014] Furthermore, the cross-section of the transmission hole is triangular, quadrilateral, pentagonal, or hexagonal, and the cross-section of the protruding end of the reducer output shaft inserted into the through hole is triangular, quadrilateral, pentagonal, or hexagonal. Attached Figure Description

[0015] Figure 1 This is an exploded structural diagram of a miniaturized speed reducer according to the present invention.

[0016] The attached diagram lists the components represented by each number as follows:

[0017] 1. Sun gear, 2. Gear ring body, 3. Transmission assembly, 31. Transmission disc, 32. Planetary gear, 33. Transmission gear, 34. Transmission hole, 4. End cover, 5. Reducer output shaft, 6. Motor. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] like Figure 1 As shown, a miniaturized speed reducer, mounted on a motor 6, includes: a sun gear 1, a gear ring body 2, a transmission assembly 3, an end cover 4, and a speed reducer output shaft 5.

[0020] The sun gear 1 is sleeved on the output shaft of the motor 6; the ring gear body 2 is sleeved on the outer periphery of the sun gear 1 and one open end thereof is fixed on the motor 6; the transmission assembly 3 comprises at least four transmission discs 31, the at least four transmission discs 31 are arranged in the ring gear body 2 in the axial direction and a plurality of planetary gears 32 are rotatably arranged on one disc surface of the transmission disc 31 close to the sun gear 1 in the circumferential direction, the plurality of planetary gears 32 are all in mesh with the inner teeth of the ring gear body 2, the plurality of planetary gears 32 on the transmission disc 31 closest to the sun gear 1 are uniformly distributed on the outer periphery of the sun gear 1 and are all in mesh with the sun gear 1, the at least three transmission discs 31 close to the sun gear 1 are all fixed with transmission gears 33 on the other disc surface away from the sun gear 1, the at least three transmission gears 33 are all in mesh with the plurality of planetary gears 32 on the adjacent transmission disc 31, and the transmission disc 31 farthest away from the sun gear 1 is provided with a transmission hole 34; the end cover 4 is covered on the other open end of the ring gear body 2 and a through hole is arranged in the middle portion thereof; the reducer output shaft 5 is rotatably connected in the through hole through a bearing and one end thereof extends into the ring gear body 2 and is inserted in the transmission hole 34, and the other end thereof extends out of the through hole.

[0021] Specifically, the plurality of planetary gears 32 on the at least four transmission discs 31 are all five.

[0022] Specifically, the transmission hole 34 is a three-edged hole, a four-edged hole, a five-edged hole or a six-edged hole, and the cross section of the extended end of the reducer output shaft 5 inserted in the through hole is a three-edged hole, a four-edged hole, a five-edged hole or a six-edged hole.

[0023] The above is only the preferred embodiment of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A miniaturized speed reducer mounted on an electric motor (6), characterized in that, The application relates to a speed reducer, which comprises the following parts: a sun gear (1) sleeved on the output shaft of a motor (6); a ring gear body (2) sleeved on the outer periphery of the sun gear (1) and fixed on the motor (6) at one open end; a transmission assembly (3) comprising at least four transmission discs (31) arranged in the ring gear body (2) along the axial direction and spaced apart along the circumferential direction on one disc surface close to the sun gear (1), wherein a plurality of planet gears (32) are rotatably arranged on each transmission disc (31), the planet gears (32) are in mesh with the inner teeth of the ring gear body (2), the planet gears (32) on the transmission disc (31) closest to the sun gear (1) are uniformly distributed on the outer periphery of the sun gear (1) and in mesh with the sun gear (1), and at least three transmission discs (31) close to the sun gear (1) are fixed with transmission gears (33) on the other disc surface away from the sun gear (1), wherein the transmission gears (33) are in mesh with the planet gears (32) on the adjacent transmission disc (31), and the transmission disc (31) farthest away from the sun gear (1) is provided with a transmission hole (34); an end cover (4) covering the other open end of the ring gear body (2) and provided with a through hole in the middle part; a reducer output shaft (5) rotatably connected in the through hole through a bearing and inserted into the transmission hole (34) at one end.

2. The compact speed reducer of claim 1, wherein The planet gears (32) on the at least four transmission discs (31) are five in number.

3. The compact speed reducer of claim 1, wherein The transmission hole (34) has a cross section in the shape of a triangle, quadrilateral, pentagon or hexagon, and the protruding end of the reducer output shaft (5) inserted into the through hole has a cross section in the shape of a triangle, quadrilateral, pentagon or hexagon.

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