Speed reducer with coaxial input and output

Abstract

The utility model relates to the technical field of speed reducers, in particular to an input and output coaxial speed reducer which comprises a box body, the left surface of the box body is fixedly connected with a gearbox cover, the gearbox cover is fixedly connected with an input shaft through a first bearing and a second bearing, and the gearbox cover is fixedly connected with an intermediate shaft through the second bearing. The middle shaft is fixedly connected with a driven gear through a first flat key, the box body is rotationally connected with an output shaft through a third bearing, the output shaft is fixedly connected with an output gear through a second flat key, and the input shaft is axially positioned through a shaft elastic check ring and a first hole elastic check ring. According to the utility model, the input shaft and the output shaft are arranged to be coaxial, so that the input shaft and the output shaft can be arranged on the same side, the internal structure is relatively simple, the price is low, the installation and the maintenance are more convenient, and the transmission is generally suitable for light-load and low-speed occasions.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a reducer with coaxial input and output. Background Art

[0002] The reducer is an independent component consisting of a gear drive, worm drive, or gear-worm drive enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine. It plays the role of matching speed and transmitting torque between the prime mover and the working machine or actuator, and is widely used in modern machinery.

[0003] The input shaft and output shaft of most reducers are not on the same axis or the same plane, so they are relatively expensive to make and purchase, and are also large in size. In view of this, we propose a reducer with coaxial input and output. Utility Model Content

[0004] The utility model aims to provide a reducer with coaxial input and output, which solves the problem that the reducer is large in size and relatively expensive in price.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A reducer with coaxial input and output comprises a housing, a gearbox cover is fixedly connected to the left surface of the housing, the gearbox cover is fixedly connected to the input shaft via a first bearing and a second bearing, the gearbox cover is fixedly connected to an intermediate shaft via a second bearing, the intermediate shaft is fixedly connected to a driven gear via a first flat key, the housing is rotatably connected to an output shaft via a third bearing, and the output shaft is fixedly connected to an output gear via a second flat key.

[0007] Preferably, the input shaft is axially positioned by a shaft elastic retaining ring and a first hole elastic retaining ring, and an outer arc surface of the input shaft is rotatably connected to a first oil seal, and the first oil seal is sealingly connected to a gearbox cover.

[0008] Preferably, a corresponding hole is opened on the inner surface of the box body, and an intermediate shaft is rotatably connected to the inner surface of the corresponding hole.

[0009] Preferably, the outer arc surface of the output shaft is sleeved with an elastic retaining ring for the third hole, two groups of the elastic retaining rings for the third hole are provided, the outer arc surface of the output shaft is rotatably connected with a second oil seal, and the second oil seal is sealed and connected to the housing.

[0010] Preferably, a sealing gasket is provided between the gearbox cover and the housing, and the sealing gasket is sealed and connected to the housing.

[0011] Preferably, a keyway is provided on the inner hole surface of the input shaft, and the input shaft is coaxial with the output shaft.

[0012] Preferably, a third flat key is fixedly connected to the outer arc surface of the output shaft.

[0013] By means of the above technical solution, the utility model provides a reducer with coaxial input and output, which has at least the following beneficial effects:

[0014] (1) The utility model sets the input shaft and the output shaft to be coaxial, so that the input shaft and the output shaft can be on the same side. The internal structure is relatively simple, the price is affordable, and it is more convenient to install and maintain. It is generally suitable for light load and low speed occasions.

[0015] (2) The utility model provides a first flat key, a second flat key, a third flat key and a keyway, wherein the keyway can be connected to a power mechanism, and the third flat key is connected to other mechanisms, so as to provide power for the input and output coaxial reducer. At the same time, the first oil seal, the second oil seal and the sealing gasket are provided to reduce the oil leakage of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] In the figure: 1. circlip for first hole; 2. first oil seal; 3. input shaft; 4. circlip for first shaft; 5. first bearing; 6. gearbox cover; 7. second bearing; 8. sealing gasket; 9. circlip for second shaft; 10. second flat key; 11. output gear; 12. third bearing; 13. circlip for third hole; 14. second oil seal; 15. third flat key; 16. output shaft; 17. housing; 18. intermediate shaft; 19. first flat key; 20. driven gear. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] See also Figure 1The utility model provides a reducer with coaxial input and output, including a housing 17, a gearbox cover 6 is fixedly connected to the left surface of the housing 17, the gearbox cover 6 is fixedly connected to the input shaft 3 through a first bearing 5 and a second bearing 7, the gearbox cover 6 is fixedly connected to the intermediate shaft 18 through the second bearing 7, the intermediate shaft 18 is assembled to the gearbox cover 6 and the corresponding holes of the second bearing 7 of the housing 17 through two second bearings 7, the intermediate shaft 18 is fixedly connected to the driven gear 20 through a first flat key 19, the housing 17 is rotatably connected to the output shaft 16 through a third bearing 12, the output shaft 16 is fixedly connected to the output gear 11 through a second flat key 10, the upper outer arc surface of the input shaft 3 is axially positioned by a first shaft circlip 4 and a first hole circlip 1, the lower outer arc surface of the input shaft 3 is axially positioned by a second shaft circlip 9 and a first hole circlip 1, and the outer arc surface of the input shaft 3 is rotatably connected to a first oil seal 2 The first oil seal 2 is sealed and connected with the gearbox cover 6. The inner surface of the box body 17 is provided with corresponding holes. The inner surface of the corresponding hole is rotatably connected with the intermediate shaft 18. The outer arc surface of the output shaft 16 is sleeved with a third hole elastic circlip 13. Two groups of third hole elastic circlips 13 are provided. The output shaft 16 is assembled into the corresponding holes of the second bearing 7 of the box body 17 through two third bearings 12, and is axially positioned by two third hole elastic circlips 13. The outer arc surface of the output shaft 16 is rotatably connected with the second oil seal 14. The second oil seal 14 is sealed and connected with the box body 17. A sealing gasket 8 is provided between the gearbox cover 6 and the box body 17. The sealing gasket 8 is sealed and connected with the box body 17. A keyway is provided on the inner hole surface of the input shaft 3. The keyway in the inner hole of the input shaft 3 is connected with the power mechanism. The input shaft 3 is coaxial with the output shaft 16. The outer arc surface of the output shaft 16 is fixedly connected with a third flat key 15. The outer end of the output shaft 16 has a third flat key 15 connected with other mechanisms.

[0022] In this embodiment, the first flat key 19, the second flat key 10, the third flat key 15 and the keyway are provided to provide power for the input shaft 3 and the output shaft 16. At the same time, the first oil seal 2, the second oil seal 14 and the sealing gasket 8 are provided to reduce the oil leakage of the reducer. At the same time, the coaxial setting of the input shaft 3 and the output shaft 16 can make the overall price of the reducer more affordable and more convenient during disassembly and maintenance.

[0023] Working principle: power is transmitted from the input shaft 3, the gear on the input shaft 3 meshes with the driven gear 20 to transmit the power to the intermediate shaft 18, the gear on the intermediate shaft 18 meshes with the output gear 11 to transmit the power to the output shaft 16, and the output shaft 16 outputs the power.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A reducer with coaxial input and output, comprising a housing (17), characterized in that: The left surface of the housing (17) is fixedly connected to a gearbox cover (6); the gearbox cover (6) is fixedly connected to an input shaft (3) via a first bearing (5) and a second bearing (7); the gearbox cover (6) is fixedly connected to an intermediate shaft (18) via the second bearing (7); the intermediate shaft (18) is fixedly connected to a driven gear (20) via a first flat key (19); the housing (17) is rotatably connected to an output shaft (16) via a third bearing (12); the output shaft (16) is fixedly connected to an output gear (11) via a second flat key (10).

2. A reducer with coaxial input and output according to claim 1, characterized in that: The upper outer arc surface of the input shaft (3) is axially positioned by a first shaft elastic retaining ring (4) and a first hole elastic retaining ring (1), and the lower outer arc surface of the input shaft (3) is axially positioned by a second shaft elastic retaining ring (9) and a first hole elastic retaining ring (1). The outer arc surface of the input shaft (3) is rotatably connected to a first oil seal (2), and the first oil seal (2) is sealingly connected to a gearbox cover (6).

3. A reducer with coaxial input and output according to claim 1, characterized in that: The inner surface of the box body (17) is provided with a corresponding hole, and the inner surface of the corresponding hole is rotatably connected with an intermediate shaft (18).

4. A reducer with coaxial input and output according to claim 1, characterized in that: The outer arc surface of the output shaft (16) is sleeved with a third hole elastic retaining ring (13), and two groups of the third hole elastic retaining rings (13) are provided. The outer arc surface of the output shaft (16) is rotatably connected with a second oil seal (14), and the second oil seal (14) is sealed and connected to the box body (17).

5. A reducer with coaxial input and output according to claim 1, characterized in that: A sealing gasket (8) is provided between the transmission cover (6) and the box body (17), and the sealing gasket (8) is sealedly connected to the box body (17).

6. A reducer with coaxial input and output according to claim 1, characterized in that: A keyway is provided on the inner hole surface of the input shaft (3), and the input shaft (3) is coaxial with the output shaft (16).

7. A reducer with coaxial input and output according to claim 1, characterized in that: A third flat key (15) is fixedly connected to the outer arc surface of the output shaft (16).

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