Half-shaft driving device for rear axle of tractor

Abstract

The utility model discloses a tractor rear axle half shaft driving device in the related technical field of agricultural machinery, which comprises a rear axle half shaft and a half shaft shell, a half shaft gland is arranged on the shaft diameter of the flange end of the rear axle half shaft, the half shaft gland is arranged between the flange of the rear axle half shaft and the half shaft shell, and the half shaft shell is arranged on the flange end of the rear axle half shaft. A supporting bearing is installed on the side, close to the half shaft shell, in the half shaft gland. The extending protective shell is arranged at the end, matched with the half-shaft gland, of the half-shaft shell, the fit clearance between the half-shaft gland and the half-shaft shell can be effectively shielded and protected, the sealing protective pad is arranged on the inner wall of the extending protective shell, installation is convenient, the sealing effect on the assembly clearance can be guaranteed, and the service life of the half-shaft shell is prolonged. The oil injection hole is formed in the half shaft shell, the sealing oil plug is installed at the position of the oil injection hole, the state of lubricating oil can be checked through the oil injection hole in daily maintenance, and the lubricating oil can be replaced and supplemented conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field related to agricultural machinery, and in particular relates to a rear axle half-axle driving device for a tractor. Background Art

[0002] The rear axle drive system of a tractor typically consists of axles and a wheel hub. The axle drive housing is mounted on the outside of the axle, with bearings installed between the axle and the housing. A hubcap is mounted on the outside of the wheel hub. A half-shaft gland is installed where the rear axle drive housing and the flange end of the rear axle meet. When assembled, a gap is formed between the gland and the housing. Because the bearing is located between the housing and the rear axle, dust entering this gap can significantly affect bearing lubrication and shorten its service life. Routine lubrication and maintenance require disassembly and assembly to add lubricant, which is inconvenient.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a tractor rear axle half-axle drive device. To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0005] The camshaft is secured to the chassis and has a locking mechanism secured thereto, wherein the camshaft is secured to a position adjacent to the chassis and has a locking mechanism secured thereto. The camshaft is secured to the chassis and has a locking mechanism secured thereto. The camshaft is secured to the chassis and has a locking mechanism secured thereto.

[0006] As a further solution of the present invention: the large gear is connected to the rear axle half shaft via a key, the large gear and the small gear are meshed with each other, a small shaft is installed at the center position of the small gear, and the small shaft is connected to the differential.

[0007] As a further solution of the present invention: a locking hole is processed at the end position of the mating end of the rear axle half shaft and the large gear, and there are two locking holes. A locking cover is installed at the end position of the rear axle half shaft, and a locking plate is provided on the outside of the locking cover. A locking screw is provided in the locking hole for locking and limiting the end. Compared with using one screw at the center position, the locking stability is good.

[0008] As a further solution of the present invention: a spring oil seal is provided at the matching position between the half-shaft pressure cover and the rear axle half-shaft, and a rotation oil seal is provided on the outside of the spring oil seal. One end of the spring of the spring oil seal faces the side of the rotation oil seal, which is convenient for installation and can enhance the sealing performance.

[0009] As a further solution of the present invention: a positioning plate is provided on the outside of the support bearing, a locking plate is provided on the side of the support bearing away from the positioning plate, a locking cap is provided on the side of the locking plate, a spring oil seal 2 is provided on the side of the locking cap away from the locking plate, and a mounting platform for supporting and limiting the spring oil seal 2 is provided in the half-shaft housing.

[0010] As a further solution of the present invention: a gasket is provided at the center position between the bottom wall of the transmission housing and the large gear, a bearing 2 is provided on the inner side of the gasket, a spacer sleeve is provided on the side of the bearing 2, a bearing 1 is provided on the side of the spacer sleeve, and a sealing spacer sleeve is provided on the side of the bearing 1 for positioning the installation of the bearing.

[0011] As a further solution of the present invention, a gap is retained between the sealing spacer and the inner wall of the half-shaft housing to facilitate the inflow of lubricating oil.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art.

[0013] The utility model provides an extended protective shell at one end of the half-shaft housing and the half-shaft pressure cover, which can effectively cover and protect the fitting gap between the half-shaft pressure cover and the half-shaft housing. A sealing protective pad is provided on the inner wall of the extended protective shell, which is convenient for installation and can ensure the sealing effect of the assembly gap, thereby effectively protecting the support bearing and internal transmission components.

[0014] The utility model is provided with an oil filling hole on the half shaft housing, and a sealing oil plug is installed at the oil filling hole. The state of the lubricating oil can be checked through the oil filling hole during daily maintenance, which is convenient for replacing and replenishing the lubricating oil.

[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are part of this application and 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 but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is the main view of the utility model;

[0019] Figure 3 It is a side view of the utility model;

[0020] Figure 4 This is the main sectional view of the utility model;

[0021] Figure 5 It is a partial enlarged view of point A of the present utility model.

[0022] In the figure: 1. Rear axle half shaft; 2. Half shaft housing; 3. Transmission housing; 4. Large gear; 5. Small gear; 6. Small shaft; 7. Locking cover; 8. Locking plate; 9. Locking screw; 10. Half shaft pressure cover; 11. Oil filling hole; 12. Sealing oil plug; 13. Sealing spacer; 14. Bearing 1; 15. Spacer and positioning sleeve; 16. Bearing 2; 17. Gasket; 18. Locking hole; 19. Spring oil seal 1; 20. Rotating oil seal; 21. Extended protective shell; 22. Sealing protective gasket; 23. Positioning plate; 24. Support bearing; 25. Locking plate; 26. Locking cap; 27. Spring oil seal 2.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0025] like Figures 1 to 5As shown, a tractor rear axle half-shaft drive device includes a rear axle half-shaft 1 and a half-shaft housing 2. A half-shaft pressure cover 10 is installed on the shaft diameter of the flange end of the rear axle half-shaft 1. The half-shaft pressure cover 10 is located between the flange of the rear axle half-shaft 1 and the half-shaft housing 2. A support bearing 24 is installed on the side of the half-shaft pressure cover 10 close to the half-shaft housing 2. An extension protective shell 21 is provided on the end of the half-shaft housing 2 close to the flange of the rear axle half-shaft 1. The extension protective shell 21 extends to the outer side of the half-shaft pressure cover 10. A sealing protective pad 22 is provided on the inner wall, and a guide ramp structure is provided at the inner opening position of the extended protective shell 21. The sealing protective pad 22 fits tightly with the outer wall of the half-axle pressure cover 10. An oil filling hole 11 is processed on the outer wall of the mounting platform of the half-axle housing 2, and a sealing oil plug 12 is installed at the oil filling hole 11. A transmission housing 3 is integrally provided at the end of the half-axle housing 2 away from the half-axle pressure cover 10. A large gear 4 and a small gear 5 are installed in the transmission housing 3 to provide driving force for the rotation of the rear axle half-axle 1.

[0026] Among them, the large gear 4 is connected to the rear axle half shaft 1 through a key, the large gear 4 and the small gear 5 are meshed with each other, and a small shaft 6 is installed at the center position of the small gear 5, and the small shaft 6 is connected to the differential.

[0027] A locking hole 18 is machined at the end position of the mating end of the rear axle half shaft 1 and the large gear 4. There are two locking holes 18. A locking cover 7 is installed at the end position of the rear axle half shaft 1. A locking plate 8 is provided on the outside of the locking cover 7. A locking screw 9 is provided in the locking hole 18 for end locking and limiting. Compared with using one screw at the center position, the locking stability is good.

[0028] A spring oil seal 19 is provided at the matching position between the half-shaft pressure cover 10 and the rear axle half-shaft 1, and a rotation oil seal 20 is provided on the outside of the spring oil seal 19. One end of the spring of the spring oil seal 19 faces the side of the rotation oil seal 20, which is convenient for installation and can enhance the sealing performance.

[0029] A positioning piece 23 is provided on the outside of the support bearing 24, a locking piece 25 is provided on the side of the support bearing 24 away from the positioning piece 23, a locking cap 26 is provided on the side of the locking piece 25, a spring oil seal 27 is provided on the side of the locking cap 26 away from the locking piece 25, and a mounting platform for supporting and limiting the spring oil seal 27 is provided in the half-shaft housing 2.

[0030] A gasket 17 is provided at the center position between the bottom wall of the transmission housing 3 and the large gear 4, and a bearing 2 16 is provided on the inner side of the gasket 17. A spacer sleeve 15 is provided on the side of the bearing 2 16, and a bearing 14 is provided on the side of the spacer sleeve 15. A sealing spacer sleeve 13 is provided on the side of the bearing 14 for positioning the installation of the bearing.

[0031] A gap is retained between the sealing sleeve 13 and the inner wall of the half-shaft housing 2 to facilitate the flow of lubricating oil.

[0032] The working principle of the utility model is as follows: the flange end of the rear axle half shaft 1 is supported by a support bearing 24. Due to the large torque at the end mating with the large gear 4, a double bearing structure of bearing 1 14 and bearing 2 16 is provided to ensure the stability of the transmission process of the rear axle half shaft 1. The differential drives the small shaft 6 to rotate, the small shaft 6 drives the small gear 5 to rotate, the small gear 5 meshes with the large gear 4, and drives the large gear 4 and the rear axle half shaft 1 to rotate;

[0033] The present invention uses a new type of half-shaft housing 2 and a half-shaft pressure cover 10. An extended protective shell 21 is provided at one end to effectively cover and protect the fitting gap between the half-shaft pressure cover 10 and the half-shaft housing 2. A sealing protective pad 22 is provided on the inner wall of the extended protective shell 21, which is convenient for installation and can ensure the sealing effect of the assembly gap, thereby effectively protecting the support bearing 24 and internal transmission components. An oil filling hole 11 is provided on the half-shaft housing 2, and a sealing oil plug 12 is installed at the oil filling hole 11. During daily maintenance, the status of the lubricating oil can be checked through the oil filling hole 11, which is convenient for replacing and replenishing the lubricating oil.

[0034] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A tractor rear axle half-shaft drive device, comprising a rear axle half-shaft (1) and a half-shaft housing (2), characterized in that: A half-shaft pressure cover (10) is installed on the shaft diameter of the flange end of the rear axle half-shaft (1), and the half-shaft pressure cover (10) is located between the flange of the rear axle half-shaft (1) and the half-shaft housing (2). A support bearing (24) is installed on the side of the half-shaft pressure cover (10) close to the half-shaft housing (2). An extended protective shell (21) is provided at one end of the half-shaft housing (2) close to the flange of the rear axle half-shaft (1). The extended protective shell (21) extends to the outer side of the half-shaft pressure cover (10), and a protective cover is provided on the inner wall of the extended protective shell (21). A sealing protective pad (22) is provided, and a guide ramp structure is provided at the inner opening position of the extended protective shell (21). The sealing protective pad (22) is tightly fitted with the outer wall of the half-shaft pressure cover (10). An oil filling hole (11) is processed on the outer wall of the mounting platform of the half-shaft housing (2), and a sealing oil plug (12) is installed in conjunction with the oil filling hole (11). A transmission housing (3) is integrally provided at one end of the half-shaft housing (2) away from the half-shaft pressure cover (10), and a large gear (4) and a small gear (5) are installed in the transmission housing (3).

2. A tractor rear axle half-shaft drive device according to claim 1, characterized in that: The large gear (4) and the rear axle half shaft (1) are connected via a key, the large gear (4) and the small gear (5) are meshed with each other, and a small shaft (6) is mounted in the center of the small gear (5).

3. A tractor rear axle half-shaft drive device according to claim 2, characterized in that: A locking hole (18) is machined at the end position of the mating end of the rear axle half shaft (1) and the large gear (4), and two locking holes (18) are provided. A locking cover (7) is installed in cooperation with the end position of the rear axle half shaft (1), and a locking piece (8) is provided on the outside of the locking cover (7). A locking screw (9) is provided in the locking hole (18).

4. A tractor rear axle half-shaft drive device according to claim 3, characterized in that: A spring oil seal (19) is provided at the mating position between the half-axle pressure cover (10) and the rear axle half-axle (1), and a self-rotating oil seal (20) is provided on the outer side of the spring oil seal (19), with one end of the spring of the spring oil seal (19) facing one side of the self-rotating oil seal (20).

5. The tractor rear axle half-shaft drive device according to claim 4, characterized in that: A positioning piece (23) is provided on the outside of the support bearing (24), a locking piece (25) is provided on the side of the support bearing (24) away from the positioning piece (23), a locking cap (26) is provided on the side of the locking piece (25), and a spring oil seal 2 (27) is provided on the side of the locking cap (26) away from the locking piece (25).

6. A tractor rear axle half-shaft drive device according to claim 5, characterized in that: A gasket (17) is provided at a central position between the bottom wall of the transmission housing (3) and the large gear (4), a bearing 2 (16) is provided inside the gasket (17), a spacer sleeve (15) is provided on the side of the bearing 2 (16), a bearing 1 (14) is provided on the side of the spacer sleeve (15), and a sealing spacer sleeve (13) is provided on the side of the bearing 1 (14).

7. The tractor rear axle half-shaft drive device according to claim 6, characterized in that: A gap is retained between the sealing sleeve (13) and the inner wall of the half-shaft housing (2).

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