CN219452824U

CN219452824U - Planet gear box input shaft mounting structure

Info

Publication number: CN219452824U
Application number: CN202320390465.7U
Authority: CN
Inventors: 莫丹君; 应福明; 彭凌峰; 丁远
Original assignee: Zhejiang Hongye Hi Tech Intelligent Equipment Co ltd
Current assignee: Zhejiang Hongye Hi Tech Intelligent Equipment Co ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-08-01
Anticipated expiration: 2033-02-24

Abstract

The utility model provides an input shaft mounting structure of a planetary gear box, and belongs to the technical field of machinery. It has solved current mounting structure and has had the not hard up problem of structure. The planetary gear box input shaft mounting structure comprises a box cover, wherein a central hole for an input shaft to pass through is formed in the box cover, a bearing is arranged in the lower end of the central hole, an inner ring and an outer ring of the bearing are respectively fixedly connected with the input shaft and the box cover, an annular blocking part is formed on the outer wall of the input shaft, the lower end of the inner ring of the bearing is tightly pressed on the annular blocking part, a positioning sleeve is coaxially arranged in the central hole, the positioning sleeve is sleeved outside the input shaft, and a framework oil seal is arranged between the positioning sleeve and the input shaft; the outer side surface of the positioning sleeve is matched with the inner side surface of the central hole and is stuck together, an annular groove is coaxially formed in the inner wall of the upper end of the central hole, a snap spring is embedded in the annular groove, and two end surfaces of the positioning sleeve are respectively pressed on the snap spring and the bearing outer ring. The utility model can ensure the stable installation of the input shaft.

Description

Planet gear box input shaft mounting structure

Technical Field

The utility model belongs to the technical field of machinery, and relates to a planetary gear box, in particular to an input shaft mounting structure of a planetary gear box.

Background

The planetary gearbox is a planetary reduction gearbox, and is structurally a mechanism for rotating a plurality of planetary gears around a sun gear, and is also a mechanism for reducing the transmission speed ratio and proportionally increasing the torque force of a motor.

The prior planetary gear box is a sealing structure (application number: 201520791306.3) of a gear box input shaft, which is disclosed in China patent library, and comprises an input shaft supported on a gear box body through a bearing, wherein an end cover fixed on the outer wall of the gear box body through a bolt is sleeved on the input shaft, an axial labyrinth structure formed by a plurality of axial labyrinth grooves is arranged on the input shaft at the inner side of the end cover, a framework oil seal is arranged on the input shaft at the outer side of the end cover, and an oil seal baffle is fixed on the outer side wall of the end cover at the outer side of the framework oil seal through an outer bolt.

In the above patent, the bearing is axially limited by the end cover, the end cover is fixedly connected with the gearbox body by the bolt, and the head of the bolt is completely exposed to the outside, so that the looseness is easily generated by external collision, and the operation stability of the input shaft is affected.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a stable-structure planetary gear box input shaft mounting structure.

The aim of the utility model can be achieved by the following technical scheme: the planetary gear box input shaft mounting structure comprises a box cover, wherein a central hole for an input shaft to pass through is formed in the box cover, a bearing is arranged in the lower end of the central hole, an inner ring and an outer ring of the bearing are respectively fixedly connected with the input shaft and the box cover, an annular blocking part is formed on the outer wall of the input shaft, and the lower end of the inner ring of the bearing is tightly pressed on the annular blocking part; the outer side surface of the positioning sleeve is matched with the inner side surface of the central hole and is stuck together, an annular groove is coaxially formed in the inner wall of the upper end of the central hole, a snap spring is embedded in the annular groove, and two end surfaces of the positioning sleeve are respectively pressed on the snap spring and the bearing outer ring.

The utility model discloses do benefit to jump ring and locating sleeve cooperation limit bearing in the axial, and jump ring and locating sleeve all are in the centre bore inside, effectively avoid jump ring and locating sleeve to receive external disturbance, make the stable rotation of input shaft support on the case lid, ensure the stable work of gear box.

In the planetary gear box input shaft mounting structure, a circle of threaded holes uniformly distributed along the circumference of the positioning sleeve are formed in the upper end face of the positioning sleeve, and the axes of the threaded holes are vertically arranged. When in actual use, the locating sleeve can be easily pulled out after the clamp spring is detached by utilizing the coordination of the threaded hole and the tool, so that the framework oil seal is convenient to replace.

In the installation structure of the input shaft of the planetary gear box, the clamping springs cover the upper orifices of all the threaded holes, prevent impurities such as dust from blocking the threaded holes, and facilitate the replacement of subsequent framework oil seals.

In the planetary gear box input shaft mounting structure, the annular groove is further coaxially formed in the outer side face of the positioning sleeve, the sealing ring is arranged in the annular groove, and the outer side wall of the sealing ring is pressed on the inner wall of the central hole, so that the sealing effect formed between the positioning sleeve and the box cover is enhanced, the communication between the outside and the inside of the gear box is stopped, and the stable operation of the gear box is ensured.

In the above-mentioned planetary gear box input shaft mounting structure, integrated into one piece has annular seat on the locating sleeve inner wall, and annular seat is coaxial with the locating sleeve, and skeleton oil blanket top surface presses on annular seat bottom surface to support the skeleton oil blanket better, ensure to form sealed reliability between locating sleeve and the input shaft.

In the above planetary gear box input shaft mounting structure, an annular positioning groove is formed in the outer side wall of the input shaft, and the annular blocking portion is an elastic retainer ring embedded in the positioning groove.

As another aspect, in the above planetary gear box input shaft mounting structure, the annular stopper and the input shaft are integrally formed.

Compared with the prior art, the planetary gear box input shaft mounting structure has the following advantages:

1. the utility model discloses do benefit to jump ring and locating sleeve cooperation limit bearing in the axial, and jump ring and locating sleeve all are in the centre bore inside, effectively avoid jump ring and locating sleeve to receive external disturbance, make the stable rotation of input shaft support on the case lid, ensure the stable work of gear box.

2. When in actual use, the locating sleeve can be easily pulled out after the clamp spring is detached by utilizing the coordination of the threaded hole and the tool, so that the framework oil seal is convenient to replace.

Drawings

Fig. 1 is a schematic structural view of a planetary gear box.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

In the figure, 1, a box body; 2. a case cover; 2a, a central hole; 3. an input shaft; 4. a bearing; 4a, an inner ring; 4b, an outer ring; 5. a positioning sleeve; 5a, an annular seat; 5b, a threaded hole; 6. a framework oil seal; 7. clamping springs; 8. a circlip; 9. and (3) sealing rings.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

Example 1

As shown in fig. 1 and 2, the planetary gear box comprises a box body 1, a box cover 2 and an input shaft 3, wherein the input shaft 3 is arranged on the box cover 2, the inner end of the input shaft 3 extends into the box body 1, and a gear is formed on the inner end of the input shaft 3.

In particular the number of the elements,

the case cover 2 is provided with a central hole 2a for the input shaft 3 to pass through, a bearing 4 is arranged in the lower end of the central hole 2a, the bearing 4 is in the form of a ball bearing 4, the bearing 4 comprises an inner ring 4a and an outer ring 4b, and the inner ring 4a and the outer ring 4b of the bearing 4 are respectively fixedly connected with the input shaft 3 and the case cover 2. In an actual product, an inner ring 4a and an outer ring 4b of the bearing 4 are respectively fixedly connected with the input shaft 3 and the box cover 2 in an interference fit mode.

As shown in fig. 2, a positioning sleeve 5 is coaxially arranged in the central hole 2a, and the outer side surface of the positioning sleeve 5 is matched with the inner side surface of the central hole 2a and stuck together. Preferably, the outer side surface of the positioning sleeve 5 and the inner side surface of the central hole 2a are mutually matched circumferential surfaces. The locating sleeve 5 is sleeved outside the input shaft 3, a framework oil seal 6 is arranged between the input shaft 3 and the locating sleeve, and at the moment, the inner side and the outer side of the framework oil seal 6 are respectively pressed on the outer side wall of the input shaft 3 and the inner side wall of the locating sleeve 5. An annular groove is coaxially formed in the inner wall of the upper end of the central hole 2a, and a clamp spring 7 is embedded in the annular groove. The locating sleeve 5 is arranged between the clamp spring 7 and the bearing 4, two end faces of the locating sleeve 5 are respectively pressed on the clamp spring 7 and the outer ring 4b of the bearing 4, an annular blocking part is arranged on the outer wall of the input shaft 3, and the lower end of the inner ring 4a of the bearing 4 is pressed on the annular blocking part so as to effectively limit the bearing 4 in the axial direction and ensure the stable rotation of the input shaft 3.

This application does benefit to jump ring 7 and position sleeve 5 cooperation and restricts bearing 4 in the axial, and jump ring 7 and position sleeve 5 all are in inside centre bore 2a, effectively avoid jump ring 7 and position sleeve 5 to receive outside interference, make input shaft 3 steady rotation support on case lid 2, ensure the stable work of gear box.

Further, an annular step is formed on the inner wall of the lower end of the central hole 2a, and the lower end face of the outer ring 4b of the bearing 4 is pressed on the bottom face of the annular step, so that the downward moving distance of the bearing 4 is limited, the bearing 4 is installed in place at one time, and the input shaft 3 is convenient to install.

In the present embodiment of the present utility model, in the present embodiment,

the annular blocking part has the following structure: an annular positioning groove is formed in the outer side wall of the input shaft 3, and the annular blocking part is an elastic retainer ring 8 embedded in the positioning groove.

An annular seat 5a is integrally formed on the inner wall of the positioning sleeve 5, the annular seat 5a is coaxial with the positioning sleeve 5, and the top surface of the framework oil seal 6 is pressed on the bottom surface of the annular seat 5a so as to better support the framework oil seal 6 and ensure the sealing reliability between the positioning sleeve 5 and the input shaft 3.

As shown in fig. 2, a circle of threaded holes 5b uniformly distributed along the circumferential direction of the positioning sleeve 5 are formed in the upper end face of the positioning sleeve 5, and the axes of the threaded holes 5b are vertically arranged. During actual use, the locating sleeve 5 can be easily pulled out after the clamp spring 7 is detached by utilizing the coordination of the threaded hole 5b and a tool, so that the framework oil seal 6 is convenient to replace. Preferably, the clamp spring 7 shields the orifices of all the threaded holes 5b, prevents impurities such as dust from blocking the threaded holes 5b, and facilitates the replacement of the subsequent framework oil seal 6.

In order to strengthen the sealing effect formed between the locating sleeve 5 and the box cover 2, an annular groove is coaxially formed in the outer side face of the locating sleeve 5, a sealing ring 9 is arranged in the annular groove, and the outer side wall of the sealing ring 9 is pressed on the inner wall of the central hole 2a, so that the sealing effect formed between the locating sleeve 5 and the box cover 2 is strengthened, the communication between the outside and the inside of the gearbox is stopped, and the stable operation of the gearbox is ensured.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that: the annular blocking part and the input shaft 3 are of an integrated structure.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The planetary gear box input shaft mounting structure comprises a box cover (2), wherein a central hole (2 a) for an input shaft (3) to pass through is formed in the box cover (2), a bearing (4) is arranged in the lower end of the central hole (2 a), an inner ring (4 a) and an outer ring (4 b) of the bearing (4) are fixedly connected with the input shaft (3) and the box cover (2) respectively, an annular blocking part is formed in the outer wall of the input shaft (3), and the lower end of the inner ring (4 a) of the bearing (4) is tightly pressed on the annular blocking part, and the planetary gear box input shaft mounting structure is characterized in that a positioning sleeve (5) is coaxially arranged in the central hole (2 a), and the positioning sleeve (5) is sleeved outside the input shaft (3) and provided with a framework oil seal (6) between the two; the outer side surface of the positioning sleeve (5) is matched with the inner side surface of the central hole (2 a) and is stuck together, an annular groove is coaxially formed in the inner wall of the upper end of the central hole (2 a), a snap spring (7) is embedded in the annular groove, and two end surfaces of the positioning sleeve (5) are respectively pressed on the snap spring (7) and the outer ring (4 b) of the bearing (4).

2. The installation structure of the input shaft of the planetary gear box according to claim 1, wherein a circle of threaded holes (5 b) are formed in the upper end face of the positioning sleeve (5) and uniformly distributed along the circumferential direction of the positioning sleeve (5), and the axes of the threaded holes (5 b) are vertically arranged.

3. A planetary gearbox input shaft mounting arrangement according to claim 2, wherein said snap springs (7) cover the upper apertures of all threaded holes (5 b).

4. The planetary gearbox input shaft mounting structure according to claim 1, wherein an annular groove is further coaxially formed in the outer side face of the positioning sleeve (5), a sealing ring (9) is arranged in the annular groove, and the outer side wall of the sealing ring (9) is pressed on the inner wall of the central hole (2 a).

5. The planetary gearbox input shaft mounting structure according to claim 1, wherein an annular seat (5 a) is integrally formed on the inner wall of the positioning sleeve (5), the annular seat (5 a) is coaxial with the positioning sleeve (5), and the top surface of the skeleton oil seal (6) is pressed on the bottom surface of the annular seat (5 a).

6. The planetary gearbox input shaft mounting structure according to claim 1, wherein an annular positioning groove is formed in the outer side wall of the input shaft (3), and the annular blocking part is an elastic retainer ring (8) embedded in the positioning groove.

7. A planetary gearbox input shaft mounting arrangement according to claim 1, characterised in that the annular stop and the input shaft (3) are of unitary construction.