Supporting and sealing structure of universal transmission shaft

Abstract

The utility model discloses a supporting and sealing structure of a universal transmission shaft, which comprises the universal transmission shaft, an input transmission shaft of the universal transmission shaft is used for being matched with a wheel edge supporting shaft, an output transmission shaft of the universal transmission shaft is used for being matched with an axle housing, and the supporting and sealing structure further comprises a shaft sleeve, outer teeth are arranged at the end, away from the cross universal joint, of the input transmission shaft, inner teeth are arranged at the end, away from the cross universal joint, of the shaft sleeve, and the inner teeth and the outer teeth of the transmission shaft are the same in tooth number and modulus. The shaft sleeve can rotate along with the transmission shaft, and a shaft hole of the shaft sleeve is in clearance fit with the input transmission shaft. Through the design that the shaft sleeve is meshed with the transmission shaft teeth, modular construction of the transmission system is achieved. The shaft sleeve can be matched with bearings and oil seals of different specifications, and the universality of parts is remarkably improved; the clearance fit design allows axial fine adjustment, the jumping problem of a traditional structure is effectively solved, the transmission stability is greatly improved, and meanwhile the accessory management cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle parts, especially to a supporting and sealing structure of a universal transmission shaft. BACKGROUND

[0002] In the steering drive axle of engineering machinery, vehicles and heavy equipment, the universal transmission shaft as a key transmission component bears the important function of power transmission, and needs to adapt to the dynamic changes of wheel edge angle and position. The traditional universal transmission shaft usually adopts a composite bushing for support, but due to the large gap between the bushing and the transmission shaft, the transmission shaft is prone to jumping during operation, which further aggravates the wear of the bushing and the oil seal. In addition, the sealing performance of the traditional supporting structure is poor, and the problem of lubricating oil leakage occurs frequently, which seriously affects the reliability and service life of the transmission system. SUMMARY

[0003] In order to solve the above problems, the utility model provides a supporting and sealing structure of a universal transmission shaft.

[0004] The utility model provides a supporting and sealing structure of a universal transmission shaft, adopts the following technical scheme:

[0005] A supporting and sealing structure of a universal transmission shaft, comprising a universal transmission shaft, the input transmission shaft of the universal transmission shaft is used for cooperating with a wheel edge supporting shaft, the output transmission shaft of the universal transmission shaft is used for cooperating with an axle housing, further comprising a shaft sleeve, the shaft sleeve is sleeved on the input transmission shaft, an outer gear is arranged on the end of the input transmission shaft away from the cross universal joint, an inner gear is arranged on the end of the shaft sleeve away from the cross universal joint, the number of teeth and the modulus of the inner gear and the outer gear of the input transmission shaft are same;The shaft sleeve can rotate with the input transmission shaft, and the shaft hole of the shaft sleeve is gap fit with the input transmission shaft.

[0006] Through the above technical scheme, the shaft sleeve and the transmission shaft are designed to be toothed, realizing the modular construction of the transmission system. The shaft sleeve can be adapted to different specifications of bearings and oil seals, significantly improving the universality of parts;The gap fit design allows axial fine adjustment, effectively solves the jumping problem of the traditional structure, greatly improves the transmission stability, and reduces the management cost of accessories.

[0007] As a preferred embodiment of the utility model, a first sealing ring is arranged on the inner wall of the shaft sleeve, and the first sealing ring forms a sealing structure with the shaft diameter of the input transmission shaft.

[0008] Through the above technical scheme, a three-dimensional sealing system is formed by adopting multiple sealing ring structures, which greatly increases the sealing contact area, significantly reduces the risk of lubricant leakage, and has the function of automatic wear compensation, prolonging the service life of the sealing element.

[0009] The utility model discloses a wheel side half shaft bearing structure, which comprises a wheel side half shaft, a wheel side support shaft, a bearing, a bearing seat, an output transmission shaft and a cross universal joint.

[0010] Through the above technical scheme, the bearing enhances the supporting strength and stability when the wheel side half shaft rotates, the bearing support structure effectively controls the radial runout, greatly reduces the vibration noise, is especially suitable for heavy load working condition, and remarkably improves the service life of the bearing.

[0011] As the preferred utility model, the outer side of the one end of the shaft sleeve close to the cross universal joint is provided with a first oil seal, the inner wall of the first oil seal is attached to the outer side of the shaft sleeve, and the outer wall of the first oil seal is attached to the wheel side support shaft.

[0012] Through the above technical scheme, the oil seal design prevents the wheel side gear oil leakage, and excellent sealing performance can still be maintained under extreme working conditions, and the maintenance period is remarkably prolonged.

[0013] As the preferred utility model, the bearing seat is arranged on the axle housing, and the second bearing is arranged between the output transmission shaft and the bearing seat.

[0014] Through the above technical scheme, the special bearing seat is arranged on the axle housing, the precise bearing is arranged between the output transmission shaft and the bearing seat, and a stable support system is constructed. The structure enhances the radial positioning precision of the transmission shaft, effectively disperses the load in the transmission process, reduces the friction loss, thereby improving the transmission efficiency and prolonging the service life. The independent design of the bearing seat facilitates maintenance and replacement, and improves the maintainability of the system.

[0015] As the preferred utility model, the groove is designed on the outer ring of the bearing seat, and the bearing seat is fixed on the axle housing through screws.

[0016] Through the above technical scheme, the special groove is arranged on the outer ring of the bearing seat, and reliable fixation is realized through screws and the axle housing. This design not only ensures the convenience of installation, but also improves the connection strength and stability.

[0017] As the preferred utility model, the second sealing ring is further arranged between the outer side of the bearing seat and the axle housing.

[0018] Through the above technical scheme, the sealing ring is additionally arranged between the bearing seat and the axle housing, a secondary sealing structure is formed, lubricating oil leakage is further prevented, and the reliability of the sealing system is improved.

[0019] As the preferred utility model, the second oil seal for preventing lubricating oil in the axle housing from leaking is arranged between the bearing seat and the output transmission shaft.

[0020] By the technical scheme, the special oil seal is arranged between the bearing seat and the output transmission shaft, dynamic sealing is carried out on the rotating interface, leakage of lubricating oil is effectively prevented, and the maintenance period is prolonged.

[0021] In summary, the utility model has at least one of the following beneficial technical effects:

[0022] 1、The utility model discloses a synchronous rotation is realized through the gear meshing design of shaft sleeve and transmission shaft, and the problem of unstable transmission of the traditional structure is solved by optimizing the cooperation gap. The standardized shaft sleeve design adapts to various bearings and oil seals, and significantly improves the universality of parts. The multistage sealing system comprises an inner sealing ring of the shaft sleeve, an outer oil seal and a secondary sealing of the bearing seat, forms all -round protection, effectively prevents lubricating oil from leaking and pollutants from invading, and prolongs the maintenance period.

[0023] 2、Stable support system is built through the optimized bearing arrangement, transmission stiffness and carrying capacity are improved, and vibration noise is reduced. The bearing seat adopts the recess screw fixing design, and installation convenience and connection strength are considered. The modular structure integrates transmission shaft, shaft sleeve and other components, improves transmission efficiency and service life, and simplifies the maintenance process. The cooperation of various sealing structures ensures long-term sealing performance, reduces maintenance cost and meets the demand of severe working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the supporting sealing structure schematic view of the universal transmission shaft of the utility model.

[0025] Figure 2 It is Figure 1 The enlarged view of A of

[0026] Figure 3 It is Figure 1 The enlarged view of B of

[0027] Figure 4 It is the structure schematic view of the shaft sleeve of the utility model.

[0028] Figure 5 It is the structure schematic view of the universal transmission shaft of the utility model.

[0029] Mark explanation: 1, shaft sleeve;2, first bearing;3, first oil seal;4, first sealing ring;5, second oil seal;6, sealing ring;7, bearing;8, bearing seat;9, input transmission shaft;10, outer gear;11, inner gear;12, wheel edge support shaft;13, cross universal joint;14, axle housing;15, output transmission shaft. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail below. Figures 1-5 The utility model will be further explained in detail below.

[0031] Example 1:

[0032] Refer to the drawings Figure 1 to the drawings Figure 5 The embodiment discloses a support sealing structure of a universal transmission shaft, which comprises a universal transmission shaft, the universal transmission shaft comprising an input transmission shaft 9 and an output transmission shaft 15, and the input transmission shaft 9 and the output transmission shaft 15 are connected through a cross universal joint 13.

[0033] The input transmission shaft 9 of the universal transmission shaft is used for cooperating with a wheel support shaft 12, and the output transmission shaft 15 of the universal transmission shaft is used for cooperating with an axle housing 14; a shaft sleeve 1 is arranged on the input transmission shaft 9, the shaft sleeve 1 is sleeved on the input transmission shaft 9, an outer gear 10 is arranged on one end of the input transmission shaft 9 away from the cross universal joint 13, an inner gear 11 is arranged on one end of the shaft sleeve 1 away from the cross universal joint 13, the inner gear 11 is the same as the outer gear 10 of the input transmission shaft 9 in the number of teeth and the modulus; the shaft sleeve 1 can rotate together with the input transmission shaft 9, and the shaft hole of the shaft sleeve 1 is in clearance fit with the input transmission shaft 9. The design of the shaft sleeve 1 increases the adaptability of the structure to bearings and oil seals of different sizes.

[0034] A plurality of first sealing rings 4 are arranged on the inner wall of the shaft sleeve 1, and two groups of the first sealing rings 4 are arranged in the embodiment. The first sealing rings 4 form a sealing structure with the shaft diameter of the input transmission shaft 9, and under the premise that the input transmission shaft 9 is axially freely movable during steering, the structure has a large contact area, stable and reliable sealing performance, and reduces the risk of oil leakage.

[0035] A first bearing 2 is sleeved on the shaft sleeve 1, the inner side of the first bearing 2 is connected with the shaft sleeve 1, and the outer side of the first bearing 2 is supported by the wheel support shaft 12, so that the support strength and stability of the wheel half shaft during rotation are enhanced by the first bearing 2.

[0036] A first oil seal 3 is arranged on the outer side of one end of the shaft sleeve 1 close to the cross universal joint 13, the inner wall of the first oil seal 3 is attached to the outer side of the shaft sleeve 1, and the outer wall of the first oil seal 3 is attached to the wheel support shaft 12. By arranging the first oil seal 3, the wheel gear oil leakage can be prevented.

[0037] A bearing seat 8 is arranged on the axle housing 14, the outer ring of the bearing seat 8 is designed with a groove, and the bearing seat 8 is fixed on the axle housing 14 through screws. A second bearing 7 is arranged between the output transmission shaft 15 and the bearing seat 8, so that the support strength and stability of the half shaft during rotation in the axle housing 14 are enhanced by the second bearing 7. A second sealing ring 6 is further arranged between the outer side of the bearing seat 8 and the axle housing 14, and the second sealing ring 6 plays a role in sealing lubricating oil.

[0038] A second oil seal 5 is arranged between the bearing seat 8 and the output transmission shaft 15, so as to prevent the lubricating oil in the axle housing from leaking.

[0039] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A support seal structure for a universal drive shaft, comprising a universal drive shaft, an input drive shaft (9) of the universal drive shaft being intended to cooperate with a wheel support shaft (12), an output drive shaft (15) of the universal drive shaft being intended to cooperate with an axle housing (14), characterized in that: Also include the bushing (1), the bushing (1) is set on the input drive shaft (9), the input drive shaft (9) is provided with external teeth (10) away from the cross universal joint (13) one end, the inner teeth (11) are set in the bushing (1) away from the cross universal joint (13) one end, the inner teeth (11) are same with the number of teeth, modulus of the external teeth (10) of input drive shaft (9);The bushing (1) can rotate with the input drive shaft (9), the clearance fit between the shaft hole of bushing (1) and input drive shaft (9).

2. A support seal structure for a universal drive shaft as set forth in claim 1, characterized in that: First sealing ring (4) is arranged on the inner wall of the bushing (1), and the first sealing ring (4) forms a sealing structure with the shaft diameter of input drive shaft (9).

3. A support seal structure for a universal drive shaft as set forth in claim 1, wherein: The first bearing (2) is set on the bushing (1), the inner side of the first bearing (2) is connected with the bushing (1), and the outer side of the first bearing (2) is supported by the wheel support shaft (12).

4. A support seal for a universal drive shaft as set forth in claim 1, wherein: The outer side of the bushing (1) near the cross universal joint (13) is provided with the first oil seal (3), the inner wall of the first oil seal (3) is attached to the outer side of the bushing (1), and the outer wall of the first oil seal (3) is attached to the wheel support shaft (12).

5. A support seal for a universal drive shaft as defined in claim 1, wherein: The bearing seat (8) is arranged on the axle housing (14), and the second bearing (7) is arranged between the output drive shaft (15) and the bearing seat (8).

6. A support seal structure for a universal drive shaft as set forth in claim 5, wherein: The bearing seat (8) is designed with a groove, and the bearing seat (8) is fixed on the axle housing (14) by screws.

7. A support seal structure for a universal drive shaft as set forth in claim 5, wherein: Second sealing ring (6) is further arranged between the outer side of the bearing seat (8) and the axle housing (14).

8. A support seal structure for a universal drive shaft as set forth in claim 5, wherein: The second oil seal (5) is arranged between the bearing seat (8) and the output drive shaft (15) to prevent the lubricating oil in the axle housing (14) from leaking.

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