Cage type planetary speed reduction structure

Abstract

The utility model relates to the technical field of speed reducers, in particular to a cage type planetary speed reduction structure which comprises a cage body, a driving wheel and a plurality of driven wheels, the driving wheel is located in the middle of a containing cavity, the driven wheels are all located on the periphery of the driving wheel, the driven wheels are all meshed with the driving wheel, and a positioning hole is formed in the end, away from an opening, of the containing cavity. A first bearing is arranged on the inner wall of the positioning hole, and a positioning part is arranged at the end, close to the output shaft, of the driving wheel in a protruding mode and connected with the inner wall of the first bearing. The driven wheels are arranged on the periphery of the positioning column in a sleeved mode one by one, so that the positions of the driven wheels can be stable, the end, close to the output shaft, of the driving wheel protrudes to form the positioning part, the positioning part is connected with the inner wall of the first bearing, the end, close to the driven wheels, of the driving wheel is supported through the first bearing, and the driving wheel is not prone to inclining; the meshing accuracy between the driving wheel and the driven wheel is improved, unnecessary vibration and noise cannot be generated, and the transmission efficiency and the service life are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a cage-type planetary reduction structure. Background Art

[0002] In the field of modern mechanical transmission, cage planetary reducers are a high-efficiency, compact transmission device that is widely used in industrial robots, precision machine tools, aerospace, electric vehicles and other fields. Its core advantage is that it can provide a higher reduction ratio and torque output while maintaining a compact structure and smooth operation. The traditional cage planetary reduction structure usually includes a driving wheel (also called a sun wheel) and multiple driven wheels (also called planetary wheels), and the deceleration function is achieved through the precise meshing of these components.

[0003] However, there are some technical bottlenecks in the existing cage planetary reducer design, especially the tilt problem of the driving wheel (which is prone to occur under high-speed rotation working conditions, which has become a key factor affecting its performance and life. This tilt phenomenon is mainly caused by manufacturing tolerances, assembly errors, uneven loads or accumulated wear under long-term operation. The abnormal tilt of the driving wheel directly leads to a decrease in the accuracy of the meshing with the driven wheel, which not only causes impact and sliding between gears, but also generates unnecessary vibration and noise. In severe cases, it may even accelerate gear wear, reduce transmission efficiency, and shorten the service life of the equipment. Utility Model Content

[0004] The utility model aims to at least solve the technical problems existing in the prior art. To this end, the utility model proposes a cage-type planetary reduction structure, in which a first bearing is provided at one end of the driving wheel close to the driven wheel for support, so that the driving wheel is not prone to tilt, the meshing accuracy between the driving wheel and the driven wheel is improved, unnecessary vibration and noise are not generated, and the transmission efficiency and service life are guaranteed.

[0005] According to some embodiments of the utility model, a cage-type planetary reduction structure comprises a cage body, a driving wheel and a plurality of driven wheels, the cage body is provided with a accommodating cavity, the driving wheel is located in the middle of the accommodating cavity, a plurality of positioning posts are arranged in the accommodating cavity, the number of the positioning posts is the same as the number of the driven wheels, the driven wheels are sleeved on the outer circumference of the positioning posts one by one, the driven wheels are all located on the outer circumference of the driving wheel, the driven wheels are all meshed with the driving wheel, an opening is arranged at one end of the cage body, an input connecting part is arranged at the end of the driving wheel close to the opening, an output shaft is arranged at the other end of the cage body, a positioning hole is arranged at the end of the accommodating cavity away from the opening, a first bearing is arranged on the inner wall of the positioning hole, a positioning part is protruded from the end of the driving wheel close to the output shaft, and the positioning part is connected to the inner wall of the first bearing.

[0006] A cage-type planetary reduction structure according to some embodiments of the utility model has at least the following beneficial effects:

[0007] The utility model provides a housing cavity in a cage body, the driving wheel is located in the middle of the housing cavity, a plurality of positioning posts are arranged in the housing cavity, the number of the positioning posts is the same as that of the driven wheel, the driven wheels are sleeved on the outer circumference of the positioning posts one by one, so that the position of the driven wheel can be stable, and a positioning hole is provided through the end of the housing cavity away from the opening, a first bearing is arranged on the inner wall of the positioning hole, a positioning portion is protruded from the end of the driving wheel close to the output shaft, the positioning portion is connected to the inner wall of the first bearing, so that the end of the driving wheel close to the driven wheel is supported by the first bearing, the driving wheel is not easy to tilt, the meshing accuracy between the driving wheel and the driven wheel is improved, unnecessary vibration and noise will not be generated, and the transmission efficiency and service life are guaranteed.

[0008] According to a cage-type planetary reduction structure in some embodiments of the present invention, a flat key is provided on the outer wall of the input connection portion.

[0009] According to a cage-type planetary reduction structure of some embodiments of the present invention, a plurality of first connecting holes are penetrated at one end of the accommodating chamber close to the input connecting part, and a plurality of second connecting holes are penetrated at one end of the accommodating chamber close to the output shaft, the first connecting holes and the second connecting holes are arranged correspondingly, the number of the first connecting holes, the second connecting holes, the driven wheel and the positioning columns are consistent, and the positioning columns are sequentially penetrated through the first connecting hole, the driven wheel and the second connecting hole.

[0010] According to a cage-type planetary reduction structure of some embodiments of the present invention, the rear end of the cage body is provided with an extension portion, and a plurality of avoidance grooves are opened on the extension portion. The avoidance grooves are arranged in a one-to-one correspondence with the first connecting holes, and the first connecting holes are all located in the avoidance grooves.

[0011] According to a cage-type planetary reduction structure in some embodiments of the present invention, a keyway is provided on the outer wall of the output shaft.

[0012] According to a cage-type planetary reduction structure in some embodiments of the present invention, a plurality of through holes are provided on the outer side of the cage body, and one side of the driven wheel extends out from the through holes.

[0013] According to a cage-type planetary reduction structure of some embodiments of the present invention, three of the driven wheels and three of the positioning columns are provided.

[0014] According to a cage-type planetary reduction structure of some embodiments of the present invention, a second bearing is provided between the positioning column and the driven wheel.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0018] Figure 2 It is a cross-sectional view of an embodiment of the utility model.

[0019] Figure 3 It is a schematic structural diagram of a cage body according to an embodiment of the utility model.

[0020] Figure 4 The figure is a schematic diagram of the structure of the driving wheel of the embodiment of the utility model.

[0021] Figure numerals: 1, cage body, 2, driving wheel, 3, driven wheel, 4, accommodating chamber, 5, positioning column, 6, opening, 7, input connecting part, 8, output shaft, 9, positioning hole, 10, first bearing, 11, positioning part, 12, flat key, 13, first connecting hole, 14, second connecting hole, 15, edge extension part, 16, avoidance groove, 17, keyway, 18, through hole, 19, second bearing. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] like Figure 1-Figure 4 As shown, an embodiment of the utility model provides a cage-type planetary reduction structure.

[0027] A cage-type planetary reduction structure comprises a cage body 1, a driving wheel 2 and a plurality of driven wheels 3, the cage body 1 being provided with a receiving chamber 4, the driving wheel 2 being located in the middle of the receiving chamber 4, a plurality of positioning posts 5 being arranged in the receiving chamber 4, the number of the positioning posts 5 being the same as that of the driven wheels 3, the driven wheels 3 being sleeved on the outer periphery of the positioning posts 5 one by one, the driven wheels 3 being all located on the outer periphery of the driving wheel 2, the driven wheels 3 being all meshed with the driving wheel 2, an opening 6 being arranged at one end of the cage body 1, an input connecting portion 7 being arranged at the end of the driving wheel 2 close to the opening 6, an output shaft 8 being arranged at the other end of the cage body 1, a positioning hole 9 being arranged at the end of the receiving chamber 4 away from the opening 6, a first bearing 10 being arranged on the inner wall of the positioning hole 9, a positioning portion 11 being protruding from the end of the driving wheel 2 close to the output shaft 8, and the positioning portion 11 being connected to the inner wall of the first bearing 10.

[0028] In this embodiment, a housing chamber 4 is provided in the cage body 1, the driving wheel 2 is located in the middle of the housing chamber 4, a plurality of positioning posts 5 are arranged in the housing chamber 4, the number of the positioning posts 5 is the same as that of the driven wheel 3, the driven wheels 3 are sleeved on the outer circumference of the positioning posts 5 one by one, so that the position of the driven wheel 3 can be stable, and a positioning hole 9 is provided through the end of the housing chamber 4 away from the opening 6, a first bearing 10 is arranged on the inner wall of the positioning hole 9, a positioning portion 11 is protruded from the end of the driving wheel 2 close to the output shaft 8, and the positioning portion 11 is connected to the inner wall of the first bearing 10, so that the end of the driving wheel 2 close to the driven wheel 3 is supported by the first bearing 10, the driving wheel 2 is not easy to tilt, the meshing accuracy between the driving wheel 2 and the driven wheel 3 is improved, unnecessary vibration and noise will not be generated, and the transmission efficiency and service life are guaranteed.

[0029] In the cage-type planetary reduction structure described in this embodiment, a flat key 12 is provided on the outer wall of the input connection part 7. Specifically, the input connection part 7 can be connected to the external driving mechanism through the flat key 12.

[0030] In the cage-type planetary reduction structure described in this embodiment, a plurality of first connection holes 13 are penetrated at one end of the accommodating chamber 4 close to the input connection part 7, and a plurality of second connection holes 14 are penetrated at one end of the accommodating chamber 4 close to the output shaft 8, the first connection holes 13 and the second connection holes 14 are arranged correspondingly, the number of the first connection holes 13, the second connection holes 14, the driven wheel 3 and the positioning posts 5 is consistent, and the positioning posts 5 are sequentially penetrated through the first connection holes 13, the driven wheel 3 and the second connection holes 14. Specifically, the above-mentioned arrangement is structurally reasonable, convenient to assemble and has good stability.

[0031] In the cage-type planetary reduction structure described in this embodiment, the rear end of the cage body 1 is provided with an extension portion 15, and a plurality of avoidance grooves 16 are provided on the extension portion 15, and the avoidance grooves 16 are provided one by one with the first connection holes 13, and the first connection holes 13 are all located in the avoidance grooves 16. Specifically, when connected to an external device, a bearing can be sleeved on the outer periphery of the extension portion 15, and the avoidance grooves 16 provided on the extension portion 15 do not disconnect the middle of the extension portion 15, thereby improving the structural stability of the extension portion 15.

[0032] In the cage-type planetary reduction structure described in this embodiment, a key slot 17 is provided on the outer wall of the output shaft 8. Specifically, the output shaft 8 can be connected to an external device through the key slot 17.

[0033] In the cage-type planetary reduction structure described in this embodiment, a plurality of through holes 18 are provided on the outer side of the cage body 1 , and one side of the driven wheel 3 extends out from the through hole 18 .

[0034] In the cage-type planetary reduction structure described in this embodiment, three driven wheels 3 and three positioning columns 5 are provided.

[0035] In the cage-type planetary reduction structure described in this embodiment, a second bearing 19 is arranged between the positioning column 5 and the driven wheel 3. Specifically, the above arrangement enables the driven wheel to rotate smoothly.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cage-type planetary reduction structure, characterized in that: The invention comprises a cage body, a driving wheel and a plurality of driven wheels, wherein the cage body is provided with a receiving cavity, the driving wheel is located in the middle of the receiving cavity, a plurality of positioning posts are arranged in the receiving cavity, the number of the positioning posts is the same as the number of the driven wheels, the driven wheels are sleeved on the outer circumference of the positioning posts one by one, the driven wheels are all located on the outer circumference of the driving wheel, the driven wheels are all meshed with the driving wheel, an opening is arranged at one end of the cage body, an input connecting part is arranged at the end of the driving wheel close to the opening, an output shaft is arranged at the other end of the cage body, a positioning hole is arranged at the end of the receiving cavity away from the opening, a first bearing is arranged on the inner wall of the positioning hole, a positioning part is protruded from the end of the driving wheel close to the output shaft, and the positioning part is connected to the inner wall of the first bearing.

2. A cage-type planetary reduction structure according to claim 1, characterized in that: A flat key is arranged on the outer wall of the input connection part.

3. The cage-type planetary reduction structure according to claim 1, characterized in that: A plurality of first connection holes are penetrated through one end of the accommodating cavity close to the input connection part, and a plurality of second connection holes are penetrated through one end of the accommodating cavity close to the output shaft. The first connection holes are arranged correspondingly to the second connection holes, and the number of the first connection holes, the second connection holes, the driven wheel and the positioning posts are consistent. The positioning posts are sequentially penetrated through the first connection holes, the driven wheel and the second connection holes.

4. A cage-type planetary reduction structure according to claim 3, characterized in that: The rear end of the cage body is provided with an extension portion, and a plurality of avoidance grooves are opened on the extension portion. The avoidance grooves are arranged in a one-to-one correspondence with the first connection holes, and the first connection holes are all located in the avoidance grooves.

5. The cage-type planetary reduction structure according to claim 1, characterized in that: A keyway is provided on the outer wall of the output shaft.

6. The cage-type planetary reduction structure according to claim 1, characterized in that: The number of the driven wheels and the number of the positioning posts are three.

7. The cage-type planetary reduction structure according to claim 1, characterized in that: A plurality of through holes are provided on the outer side of the cage body, and one side of the driven wheel extends out from the through holes.

8. The cage-type planetary reduction structure according to claim 1, characterized in that: A second bearing is arranged between the positioning column and the driven wheel.

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