CN112268102A

CN112268102A - Reduction gear assembly

Info

Publication number: CN112268102A
Application number: CN202011298661.9A
Authority: CN
Inventors: 童善方; 童立浩天
Original assignee: Zhejiang Yuanchuang Pu Beitelman Technology Co ltd
Current assignee: Zhejiang Yuanchuang Pu Beitelman Technology Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-01-26

Abstract

The invention discloses a reduction gear assembly, comprising: an inner gear is formed on the inner side wall of the outer shell; the planetary gear consists of bevel gears and straight gears which are connected in front and back, the straight gears are meshed with the internal gear, the other planetary gear components respectively comprise sun gears except the planetary gear component positioned at the last side, and the periphery of each sun gear is provided with conical gear teeth which are meshed with the bevel gears on the planetary carriers positioned at the rear side; a first functional member; a second functional member; and, one of the first and second functional members serves as an input member to which an external motor is connected, and the other serves as an output member to which an external working device is connected. Its technical scheme makes can play holistic speed reduction effect, and the transmission of power is more firm, and the structure is compacter, and the noise is lower, and the speed reduction effect is better.

Description

Reduction gear assembly

Technical Field

The invention relates to the technical field of gear reduction mechanisms, in particular to a reduction gear assembly.

Background

The gear speed reducing mechanism is widely applied to various transmission mechanisms, particularly to a motor output mechanism, and because of different application environments and different torque resistance strengths of connecting shafts, the speed reducing mechanism is required to be used for reducing speed so as to meet various application requirements. At present, the reduction mechanism usually adopts a gear box structure, and the reduction effect is realized through the combination of a plurality of stages of straight gears and duplicate gears, but in the reduction structure, in order to ensure the reduction effect, the number of gears in the reduction structure is large, so that the whole structure is overstaffed, and meanwhile, the straight gears are easy to generate large noise in the force transmission process.

Disclosure of Invention

In view of the above problems in the prior art, a reduction gear assembly with better reduction effect, more stable transmission of force, more compact structure and lower noise is provided to overcome the above technical disadvantages.

The specific technical scheme is as follows:

a reduction gear assembly comprising:

an outer shell, the inner side wall of which is provided with an inner gear;

each planetary gear assembly comprises a planetary carrier and at least three planetary gears which are rotatably arranged at the front end of the planetary carrier in an annular array, each planetary gear consists of a bevel gear and a straight gear which are connected in front and back, each straight gear is respectively meshed with an internal gear, the rest planetary gear assemblies also respectively comprise a sun gear which is arranged at the rear end of the planetary carrier except the planetary gear assembly positioned at the last side, the periphery of the sun gear is provided with conical gear teeth matched with the bevel gear in shape, and each sun gear is mutually meshed with the bevel gear of the planetary gear on the planetary carrier positioned at the rear side;

the front end of the first functional component is connected with the planet carrier of the planet wheel component positioned at the rearmost side, and the rear end of the first functional component extends backwards out of the outer shell;

the rear end of the second functional component is provided with an umbrella-shaped gear tooth structure matched with the shape of a bevel gear and is meshed with the three planet gears of the planet gear assembly positioned at the foremost side, and the front end of the second functional component extends forwards out of the outer shell;

and, one of the first and second functional members serves as an input member to which an external motor is connected, and the other serves as an output member to which an external working device is connected.

Preferably, the planet carrier is integrally in a fan blade shape and has plate-shaped support structures with the same number as the planet wheels, each plate-shaped support is provided with a first mounting hole in a penetrating manner, each first mounting hole is internally embedded with a pin shaft, and each planet wheel is sleeved on one pin shaft.

Preferably, a second mounting hole is further formed in the center of each planet carrier, and the rear ends of the sun gear and the first functional member are provided with connecting shafts matched with the second mounting holes in shape.

Preferably, the rear end of the first functional component is in an optical axis structure or a gear structure or a square axis structure or an internal gear structure with a key groove.

Preferably, the front end of the second functional component is in an optical axis structure or a gear structure or a square axis structure or an internal gear structure with a key groove.

Preferably, through holes for penetrating through the first functional component and the second functional component are formed in the front end face and the rear end face of the outer shell, and annular plates for shielding the through holes are further arranged in the middle of the first functional component and the second functional component.

Preferably, the number of the planet wheel assemblies is three groups which are arranged from back to front in sequence.

Preferably, the number of planet wheel assemblies is one.

Preferably, the number of the planet wheel assemblies is two groups which are arranged from back to front in sequence.

The beneficial effects of the above technical scheme are that:

the reduction gear assembly comprises an outer shell, at least one set of planetary wheel assembly, a first functional component and a second functional component, wherein the planetary wheel assembly comprises a planetary carrier, a planetary wheel and a sun wheel, so that the whole reduction effect can be achieved, the force is transmitted more stably, the structure is more compact, the noise is lower, and the reduction effect is better.

Drawings

FIG. 1 is a perspective view of a first reduction gear assembly embodiment of the present invention;

FIG. 2 is a cross-sectional view of a first embodiment of the reduction gear assembly of the present invention;

FIG. 3 is an exploded view of an embodiment of the reduction gear assembly of the present invention with the outer housing removed;

FIG. 4 is an exploded view of the planetary assembly of one embodiment of the reduction gear assembly of the present invention;

FIG. 5 is an exploded view of the second reduction gear assembly of the present invention with the outer housing removed;

fig. 6 is an exploded view of a third embodiment of the reduction gear assembly of the present invention with the outer housing removed.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described with reference to the attached drawings. And defines the direction from left to right as viewed in the plane of the paper in fig. 2 as the direction from back to front in this embodiment.

In the first embodiment, the first step is,

referring to fig. 1 to 4, the reduction gear assembly of the present embodiment includes:

an outer casing 1, an inner side wall of which is formed with an inner gear 11;

at least one group of planet wheel assemblies 2, each planet wheel assembly 2 comprises a planet carrier 21 and at least three planet wheels 22 which are rotatably arranged at the front end of the planet carrier 21 in an annular array, each planet wheel 22 consists of a bevel wheel 25 and a straight gear 26 which are connected in front and back, each straight gear 26 is respectively meshed with the internal gear 11, except the planet wheel assembly 2 positioned at the rearmost side, each planet wheel assembly 2 also comprises a sun wheel 23 which is arranged at the rear end of the planet carrier 21, the periphery of the sun wheel 23 is provided with conical wheel teeth matched with the shape of the bevel wheel 25, and each sun wheel 23 is meshed with the bevel wheels 25 of the three planet wheels 22 on the planet carrier 21 positioned at the rear side;

a first functional component 3, the front end of which is connected with the planet carrier 21 of the planet wheel assembly 2 positioned at the rearmost side, and the rear end of which extends backwards out of the outer shell 1;

a second functional member 4, the rear end of which has a bevel gear tooth structure matched with the shape of a bevel gear 25 and is engaged with the three planet gears 22 of the planet gear assembly 2 positioned at the foremost side, and the front end of which extends forwards out of the outer shell 1;

and, one of the first and second

functional members

3 and 4 serves as an input member to which an external motor is connected, and the other serves as an output member to which an external working device is connected.

Based on above-mentioned technical scheme, the reduction gear assembly includes shell body 1, at least a set of planet wheel subassembly 2, first functional component 3, second functional component 4, and planet wheel subassembly 2 includes planet carrier 21, planet wheel 22 and sun gear 23 for can play holistic speed reduction effect, and the transmission of power is more firm, and the structure is compacter, and the noise is lower, and the speed reduction effect is better.

In a preferred embodiment, the planet carrier 21 is a fan-blade type, and has a plate-shaped support structure with the same number as the planet wheels 22, and each plate-shaped support is provided with a first mounting hole in a penetrating manner, a pin 24 is embedded in each first mounting hole, and each planet wheel 22 is sleeved on one pin 24. Specifically, each pin shaft 24 is limited by a snap spring after being sleeved on the planet wheel 22. Making the planet carrier 21 as a whole lighter. Furthermore, a second mounting hole is further formed in the center of each planet carrier 21, and the rear ends of the sun gear 23 and the first functional member 3 are respectively provided with a connecting shaft matched with the second mounting hole in shape for mutual fixed connection. Furthermore, the planet carrier 21 is formed by punching a metal material, and the pin shaft 24 and the connecting shaft are directly pressed on the planet carrier 21 to achieve the purpose of tight fit.

As a further preferred embodiment, the rear end of the first functional member 3 has a splined optical axis structure or a splined gear structure or a square axis structure or an internal gear structure. Further, the front end of the second functional component 4 is in an optical axis structure or a gear structure or a square axis structure or an internal gear structure with a key groove. The specific requirement can be determined according to the external requirement, and the assembling and connecting purpose can be achieved, but the method is not limited to the method. Furthermore, through holes for penetrating through the first functional component 3 and the second functional component 4 are formed in the front end face and the rear end face of the outer shell 1, and annular plates for shielding the through holes are further arranged in the middle of the first functional component 3 and the middle of the second functional component 4, so that a dustproof effect is achieved to the maximum degree, and dust is prevented from entering the inner portion of the outer shell 1. Specifically, the through hole may be embedded with a bearing, and the side of the annular plate facing the outer housing 1 may be embedded with a ball, so as to achieve the effects of further preventing dust and transmitting force, and prevent dry friction. It is worth pointing out that the inner side wall of the outer casing 1, which is formed with the internal gear 11, means: no matter how the appearance structure of the outer shell is, the inner part of the outer shell forms a cylindrical structure, and gear teeth are annularly arranged on the inner wall of the cylindrical structure.

In a preferred embodiment, the number of the planetary wheel assemblies 2 is three groups which are arranged from back to front in sequence in the embodiment.

In a specific application of the present embodiment, if the second functional component 4 is used as an input component, the first functional component 3 is used as an output component, when the external motor drives the second functional component 4 to rotate, the rear end of the second functional component 4 drives the planetary gear 22 to rotate with the three planetary gears 22 of the planetary gear 22 bracket at the frontmost side through the engaged umbrella-shaped gear structure, and at the same time, the three planetary gears 22 are engaged with the internal gear 11 of the outer shell 1, and the outer shell 1 is stationary in a working state, so as to drive the connected planetary gear 21 and the sun gear 23 to rotate, and then the circumferential rotation action is gradually transmitted to the first functional component 3 in the same manner, so as to output torque outwards. The first functional component 3 is used as an input component, and the second functional component 4 is used as an output component, which is just opposite to the above operation principle, and thus, the description thereof is omitted.

In the second embodiment, the first embodiment of the method,

referring to fig. 5, the reduction gear assembly provided in this embodiment is substantially the same as the first embodiment, except that the number of planetary gear assemblies 2 in this embodiment is one, and the sun gear 23 is not provided, and the planetary gear assemblies 2 are directly connected to the first functional component 3 and the second functional component 4 in a transmission manner.

In the third embodiment, the first step is that,

referring to fig. 5, the reduction gear assembly provided in this embodiment is basically the same as the first embodiment, except that the number of the planet wheel assemblies 2 is two sets arranged from back to front.

Obviously, the number of the planetary wheel assemblies 2 can be determined according to the requirements of practical application, and is not limited to one to three groups, and can also be more than three groups.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A reduction gear assembly, comprising:

an outer casing (1) having an inner gear (11) formed on an inner wall thereof;

at least one set of planet wheel assembly (2), each planet wheel assembly (2) comprises a planet carrier (21), a rotatable annular array and at least three planet wheels (22) arranged at the front end of the planet carrier (21), each planet wheel (22) comprises a bevel gear (25) and a straight gear (26) which are connected with each other from front to back, each straight gear (26) is respectively meshed with the internal gear (11), except the planet wheel assembly (2) positioned at the rearmost side, each of the rest planet wheel assemblies (2) also respectively comprises a sun wheel (23) arranged at the rear end of the planet carrier (21), the periphery of the sun gear (23) is provided with conical gear teeth matched with the shape of the bevel gear (25), and each of the sun gears (23) is engaged with a bevel gear (25) of a planetary gear (22) on the planet carrier (21) at a rear position;

a first functional component (3), the front end of which is connected with the planet carrier (21) of the planet wheel component (2) positioned at the rearmost side, and the rear end of which extends backwards out of the outer shell (1);

a second functional component (4) which has a bevel gear tooth structure matched with the shape of the bevel gear (25) at the rear end and is meshed with the three planet gears (22) of the planet gear assembly (2) positioned at the most front side, and the front end of the second functional component extends forwards out of the outer shell (1);

and one of the first functional member (3) and the second functional member (4) serves as an input member to which an external motor is connected, and the other serves as an output member to which an external working device is connected.

2. The reduction gear assembly according to claim 1, wherein the planet carrier (21) is a fan-blade type, and has a plate-shaped support structure with the same number as the planet gears (22), and each plate-shaped support is provided with a first mounting hole in a penetrating manner, a pin shaft (24) is embedded in each first mounting hole, and each planet gear (22) is sleeved on one pin shaft (24).

3. The reduction gear assembly according to claim 2, wherein a second mounting hole is further formed in a central position of each planet carrier (21), and the rear ends of the sun gear (23) and the first functional member (3) are provided with connecting shafts matched with the second mounting holes in shape.

4. The reduction gear assembly according to claim 1, wherein the rear end of the first functional member (3) has a splined optical axis structure or a splined gear structure or a square axis structure or an internal gear structure.

5. The reduction gear assembly according to claim 4, wherein the front end of the second functional member (4) has a splined optical axis structure or a splined gear structure or a square axis structure or an internal gear structure.

6. The reduction gear assembly according to claim 5, wherein the outer housing (1) has through holes formed on front and rear end surfaces thereof for passing through the first and second functional members (3, 4), and the first and second functional members (3, 4) further have annular plates formed in intermediate portions thereof for shielding the through holes.

7. Reduction gear assembly according to one of claims 1 to 6, characterised in that the number of planet wheel assemblies (2) is three sets arranged one after the other from the rear to the front.

8. Reduction gear assembly according to one of claims 1 to 6, in which the number of planetary wheel assemblies (2) is one group.

9. Reduction gear assembly according to one of claims 1 to 6, characterised in that the number of planet wheel assemblies (2) is two groups arranged one after the other from the rear to the front.