Single-stage gearbox

Abstract

The utility model discloses a single-stage gearbox which comprises a driving piece end plate, a gearbox shell, an input shaft and an output shaft, the gearbox shell is installed on one side of the driving piece end plate, a driving shaft is rotatably installed on the driving piece end plate through a driving shaft bearing, one end of the input shaft is fixedly connected with the driving shaft, and the other end of the input shaft is fixedly connected with the output shaft. The other end of the input shaft is rotationally connected with the transmission shell through an input shaft bearing, and an input gear is fixed to the input shaft. One end of the output shaft is rotationally connected with the driving part end plate through an output shaft bearing, the other end of the output shaft is rotationally connected with the transmission shell through an output shaft bearing, an output gear is fixed to the output shaft, and the output gear is meshed with the input gear. One end of the input shaft is supported and connected through the driving shaft bearing, so that one bearing of the transmission is reduced, and the production cost of the single-stage transmission is reduced; and meanwhile, the structure of the transmission box body for supporting the bearing is reduced, and the miniaturization and lightweight design of the transmission is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, in particular to a single-stage transmission. Background Art

[0002] The transmission part of a single-stage transmission consists of an input shaft and an output shaft. The input shaft and the output shaft each have a gear integrated with the shaft, and the two gears have different numbers of teeth, thereby realizing the speed change function.

[0003] Existing single-stage transmissions require a bearing at each end of the input and output shaft for support and positioning. This necessitates four bearings within a single-stage transmission, limiting its miniaturization and lightweight design. Bearings are also a relatively costly component in small transmissions, and the four-bearing structure further limits cost reduction.

[0004] Based on the above technical problems, the present application proposes a single-stage gearbox. Utility Model Content

[0005] The purpose of this utility model is to provide a single-stage gearbox to solve the technical problems mentioned in the background technology. The purpose of this utility model is achieved through the following technical solutions:

[0006] A single-stage transmission comprises a driving member end plate, a transmission housing, an input shaft and an output shaft. The transmission housing is mounted on one side of the driving member end plate. The driving shaft is rotatably mounted on the driving member end plate via a driving shaft bearing. One end of the input shaft is fixedly connected to the driving shaft, and the other end of the input shaft is rotatably connected to the transmission housing via an input shaft bearing. An input gear is fixed on the input shaft; one end of the output shaft is rotatably connected to the driving member end plate via an output shaft bearing, and the other end of the output shaft is rotatably connected to the transmission housing via an output shaft bearing. An output gear is fixed on the output shaft, and the output gear meshes with the input gear.

[0007] Furthermore, an external spline is provided at one end of the input shaft close to the drive shaft; a mounting groove is provided at the end of the drive shaft, an internal spline is provided on the inner wall of the mounting groove, and the internal spline cooperates with the external spline.

[0008] Furthermore, a positioning shaft head is fixed to one end of the input shaft close to the driving shaft, a positioning hole is opened at the bottom of the mounting groove, and the positioning shaft head is inserted into the positioning hole.

[0009] Furthermore, a drive shaft hole is opened on the end plate of the driving member, and the drive shaft is rotatably installed in the drive shaft hole through a drive shaft bearing, and an oil seal is provided between the drive shaft and the drive shaft hole.

[0010] Furthermore, an output shaft hole is opened on the transmission housing, one end of the output shaft passes through the output shaft hole and extends out of the transmission housing, and an oil seal is provided between the output shaft and the output shaft hole.

[0011] Furthermore, the input gear and the output gear are both helical gears, the input gear and the input shaft are integrally formed, and the output gear and the output shaft are integrally formed.

[0012] Furthermore, the input shaft bearing is a four-point angular contact bearing.

[0013] Furthermore, the output shaft bearing is a cylindrical roller bearing.

[0014] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] By supporting and connecting one end of the input shaft through the drive shaft bearing, one bearing of the transmission is reduced, thereby lowering the production cost of the single-stage transmission; at the same time, the structure of the transmission case used to support the bearing is also reduced, which is conducive to the miniaturization and lightweight design of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0018] Figure 2 for Figure 1 A partial enlarged view of

[0019] Figure 3 This is a schematic diagram of the end plate structure of the driving member according to an embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of the transmission housing structure of an embodiment of the present application;

[0021] Figure 5 This is a schematic diagram of the drive shaft and input shaft structure of an embodiment of the present application;

[0022] Figure 6 This is a schematic diagram of the output shaft structure of an embodiment of the present application.

[0023] Markings in the attached figure: 1. Drive member end plate; 11. Drive shaft hole; 12. Output shaft bearing seat; 2. Transmission housing; 21. Input shaft bearing seat; 22. Output shaft hole; 3. Input shaft; 31. Input gear; 32. External spline; 33. Positioning shaft head; 34. Small retaining spring; 35. Large retaining spring; 4. Output shaft; 41. Output gear; 5. Input shaft bearing; 6. Drive shaft; 61. Mounting groove; 62. Internal spline; 63. Positioning hole; 7. Output shaft bearing; 8. Oil seal; 9. Drive shaft bearing. DETAILED DESCRIPTION

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present utility model.

[0025] like Figures 1-6 The single-stage transmission shown in the figure includes a drive end plate 1, a transmission housing 2, an input shaft 3, and an output shaft 4. The transmission housing 2 is fastened to one side of the drive end plate 1 by bolts, thereby forming a sealed mounting cavity between the drive end plate 1 and the transmission housing 2. The input shaft 3 and the output shaft 4 are both mounted within the mounting cavity.

[0026] like Figure 1 、 Figure 3 As shown, a driving shaft hole 11 is opened on the upper part of the driving member end plate 1 and passes through the driving member end plate 1. An output shaft bearing seat 12 is fixed to the lower part of the right side of the driving member end plate 1. The output shaft bearing seat 12 and the driving member end plate 1 are integrally formed.

[0027] like Figure 1 、 Figure 4 As shown, an input shaft bearing seat 21 is fixed to the upper portion of the left side of the transmission housing 2. The input shaft bearing seat 21 is coaxially arranged with the drive shaft hole 11 and is integrally formed with the transmission housing 2. An output shaft hole 22 is formed in the lower portion of the transmission housing 2 and passes through the transmission housing 2. The output shaft hole 22 is coaxially arranged with the output shaft bearing seat 12.

[0028] like Figure 1 As shown, the drive end plate 1 is the motor end plate. The motor's rotor is mounted on the left side of the drive end plate 1. The motor's drive shaft 6 is mounted in a drive shaft hole 11 via a drive shaft bearing 9. When the motor is started, the rotor drives the drive shaft 6 to rotate. An oil seal 8 is installed between the drive shaft 6 and the drive shaft hole 11 to isolate the gearbox from the outside air and prevent lubricating oil leakage.

[0029] like Figure 1 、 Figure 2 、 Figure 5As shown, an input gear 31 is integrally formed on the input shaft 3. An input shaft bearing 5 is mounted on the right end of the input shaft 3 via a small retaining spring 34. The left end of the input shaft bearing 5 is mounted within the input shaft bearing seat 21 via a large retaining spring 35. The small retaining spring 34 and the large retaining spring 35 cooperate to limit the axial position of the input shaft 3. The input shaft bearing 5 is a four-point angular contact bearing. The inner ring (or outer ring) of a four-point contact ball bearing is precisely assembled from two half-rings, and the groove curvature radius of its entire outer ring (or inner ring) is very small, ensuring that the steel balls contact the inner and outer rings at four "points." This increases radial load capacity while simultaneously being able to withstand large axial loads in both directions in a compact package. Furthermore, it provides excellent axial limiting capability in both directions.

[0030] like Figure 1 、 Figure 5 As shown, the left end of the input shaft 3 is formed with an external spline 32, and the right end of the drive shaft 6 is provided with a cylindrical mounting groove 61. The mounting groove 61 is coaxial with the drive shaft 6, and the inner wall of the mounting groove 61 is formed with an internal spline 62 that mates with the external spline 32. When the drive shaft 6 rotates, the torque is transmitted to the input shaft 3 through the internal spline 62 and the external spline 32.

[0031] like Figure 1 、 Figure 5 As shown, a positioning stub 33 is also fixed to the left end of the input shaft 3. The positioning stub 33 is coaxial with the input shaft 3 and has a smaller outer diameter than the input shaft 3. The left end of the positioning stub 33 is chamfered. A positioning hole 63 is defined at the bottom of the mounting groove 61. The inner diameter of the positioning hole 63 matches the outer diameter of the positioning stub 33, and the depth of the positioning hole 63 is greater than the length of the positioning stub 33. The positioning stub 33 is inserted into the positioning hole 63 to limit the radial direction of the input shaft 3.

[0032] like Figure 1 、 Figure 6 As shown, the output shaft 4 is integrally formed with an output gear 41. Output shaft bearings 7 are mounted at each end of the output shaft 4. The left-hand output shaft bearing 7 is mounted on the output shaft bearing seat 12, while the right-hand output shaft bearing 7 is mounted within the output shaft hole 22. The output gear 41 meshes with the input gear 31, and the right end of the output shaft 4 is connected to the load. The torque of the input shaft 3 is transmitted to the output shaft 4 via the input gear 31 and the output gear 41, and then to the load after the speed change. An oil seal 8 is installed between the output shaft 4 and the output shaft hole 22 to isolate the gearbox from the outside air and prevent leakage of the gearbox lubricating oil.

[0033] The input gear 31 and the output gear 41 are both helical gears, ensuring more stable speed-changing performance. The output shaft bearing 7 is a cylindrical roller bearing, with line contact between the cylindrical rollers and the raceway. This provides a high load capacity and low friction between the rolling elements and the ribs of the ferrule, making it suitable for high-speed rotation.

[0034] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0035] By supporting and connecting one end of the input shaft through the drive shaft bearing, one bearing of the transmission is reduced, thereby lowering the production cost of the single-stage transmission; at the same time, the structure of the transmission case used to support the bearing is also reduced, which is conducive to the miniaturization and lightweight design of the transmission.

[0036] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A single-stage gearbox, characterized in that: The transmission housing includes a driving member end plate, a transmission housing, an input shaft and an output shaft. The transmission housing is installed on one side of the driving member end plate. The driving shaft is rotatably installed on the driving member end plate through a driving shaft bearing. One end of the input shaft is fixedly connected to the driving shaft, and the other end of the input shaft is rotatably connected to the transmission housing through an input shaft bearing. An input gear is fixed on the input shaft; one end of the output shaft is rotatably connected to the driving member end plate through an output shaft bearing, and the other end of the output shaft is rotatably connected to the transmission housing through an output shaft bearing. An output gear is fixed on the output shaft, and the output gear is meshed with the input gear.

2. A single-stage gearbox according to claim 1, characterized in that: An external spline is provided at one end of the input shaft close to the drive shaft; a mounting groove is provided at the end of the drive shaft, an internal spline is provided on the inner wall of the mounting groove, and the internal spline cooperates with the external spline.

3. A single-stage gearbox according to claim 2, characterized in that: A positioning shaft head is fixed to one end of the input shaft close to the driving shaft, a positioning hole is formed at the bottom of the mounting groove, and the positioning shaft head is inserted into the positioning hole.

4. A single-stage gearbox according to claim 1, characterized in that: A drive shaft hole is provided on the end plate of the driving member. The drive shaft is rotatably mounted in the drive shaft hole via the drive shaft bearing. An oil seal is provided between the drive shaft and the drive shaft hole.

5. The single-stage gearbox according to claim 1, characterized in that: An output shaft hole is provided on the transmission housing, one end of the output shaft passes through the output shaft hole and extends out of the transmission housing, and an oil seal is provided between the output shaft and the output shaft hole.

6. The single-stage gearbox according to claim 1, characterized in that: The input gear and the output gear are both helical gears. The input gear and the input shaft are integrally formed, and the output gear and the output shaft are integrally formed.

7. The single-stage gearbox according to claim 1, characterized in that: The input shaft bearing is a four-point angular contact bearing.

8. The single-stage gearbox according to claim 1, characterized in that: The output shaft bearing is a cylindrical roller bearing.

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