Spline housing sealing structure

Abstract

The utility model discloses a spline housing sealing structure, and relates to the technical field of gearbox sealing. The sealing structure comprises a rotating shaft, a spline ending in a cutter diameter mode is constructed on the rotating shaft, the tail portion of the spline and the rotating shaft are coaxially sleeved with a spline sleeve, the spline sleeve is in interference fit with the rotating shaft, an oil seal mechanism is constructed on the outer portion of the spline sleeve, and the spline sleeve and a lip of the oil seal mechanism form a sealing structure. The problems that due to existing spline sealing, the axial size of a gearbox is increased, or the strength of a rotating shaft is reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox sealing technical field, specifically is a spline sleeve sealing structure. BACKGROUND

[0002] At present, when adopting hobbing machining at spline of output shaft of gearbox, in order to leave enough oil seal sealing bandwidth, spline tailing size has to be left, which leads to that the axial size of gearbox is relatively long. Some schemes are in the form of tool withdrawal groove to tail spline, and such scheme leads to that the strength of shaft is reduced and the processing difficulty of spline is increased.

[0003] At present, spline of gearbox has two forms at tailing place: tool diameter tailing and tool withdrawal groove tailing. The tool diameter tailing mode leads to that the length of shaft is relatively long, and oil seal cannot form sealing at tailing place, and sealing surface has to be additionally arranged on the surface of shaft. The tool withdrawal groove tailing mode leads to that the strength of shaft is weak at tool withdrawal groove. SUMMARY

[0004] The utility model discloses a spline sleeve sealing structure, which solves the problems of lengthening the axial size of the gearbox caused by the existing spline sealing or reducing the strength of the rotating shaft.

[0005] In order to solve the above problems, the utility model adopts the following technical scheme:

[0006] A spline sleeve sealing structure, comprising a rotating shaft, wherein the rotating shaft is provided with a spline that is tailed in the form of tool diameter, a spline sleeve is coaxially arranged on the spline tail part of the spline, the spline sleeve is in interference fit with the rotating shaft, an oil seal mechanism is arranged outside the spline sleeve, and the spline sleeve and the lip of the oil seal mechanism form a sealing structure.

[0007] Preferably, the rotating shaft is an output shaft or an input shaft of the gearbox.

[0008] Further, the oil seal mechanism is in interference fit with the gearbox.

[0009] Further, the spline is formed by hobbing machining, and the spline teeth of the spline tail part are tailed in the form of gradually exiting.

[0010] Further, the spline sleeve completely wraps the spline tail part.

[0011] In the process of use, the utility model has the following beneficial effects:

[0012] The utility model can avoid the problem of the axial length of the traditional structure being too long, reduce the volume and weight of the gearbox, realize the hobbing machining of the spline, reduce the processing cost, ensure that the strength of the shaft is not reduced due to the processing, and ensure the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model.

[0014] Among them, 1 - gearbox, 2 - oil seal mechanism, 3 - spline sleeve, 4 - rotating shaft, 5 - spline, 6 - key tail. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0018] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please refer to Figure 1 As shown, a spline sleeve sealing structure includes a rotating shaft 4, on which a spline 5 ending in the shape of a cutting tool diameter is constructed. The key tail 6 of the spline 5 is coaxially sleeved with a spline sleeve 3 on the rotating shaft 4. The spline sleeve 3 is interference-fitted with the rotating shaft 4. An oil seal mechanism 2 is constructed on the outside of the spline sleeve 3, and the lip of the spline sleeve 3 and the oil seal mechanism 2 form a sealing structure.

[0022] This avoids the problem of excessive axial length in traditional structures, reducing the size and weight of the gearbox 1. It also allows for gear hobbing of the spline 5, reducing machining costs. Furthermore, it ensures that the shaft's strength is not affected by machining processes, guaranteeing product quality.

[0023] Specifically, to ensure the strength of the shaft 4 is not weakened, the tail of the spline 5, i.e., the key tail 6, ends with the diameter of the cutting tool. However, this also introduces a problem: the key tail 6 cannot form a sealing surface with the oil seal mechanism 2. Therefore, a spline sleeve 3 is fitted onto the key tail 6, completely enclosing it and interfering with the shaft 4. A seal is formed between the spline sleeve 3 and the oil seal mechanism 2. This structure effectively shortens the shaft length while ensuring its strength.

[0024] Furthermore, the rotating shaft 4 is the output shaft or input shaft of the gearbox 1.

[0025] Meanwhile, the oil seal mechanism 2 is interference-fitted with the gearbox 1.

[0026] Furthermore, the spline 5 is formed by hobbing, and the key teeth of the key tail 6 end in a gradually withdrawing manner.

[0027] The spline sleeve 3 completely covers the tail of the key 6.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spline sleeve sealing structure, characterized in that, Includes a rotating shaft (4), on which a spline (5) ending in the shape of a cutting tool diameter is constructed. The key tail (6) of the spline (5) is coaxially fitted with a spline sleeve (3) on the rotating shaft (4). The spline sleeve (3) is interference-fitted with the rotating shaft (4). An oil seal mechanism (2) is constructed on the outside of the spline sleeve (3). The lip of the spline sleeve (3) and the oil seal mechanism (2) form a sealing structure.

2. The spline sleeve sealing structure according to claim 1, characterized in that, The rotating shaft (4) is the output shaft or input shaft of the gearbox (1).

3. The spline sleeve sealing structure according to claim 1, characterized in that, The oil seal mechanism (2) is interference-fitted with the gearbox (1).

4. The spline sleeve sealing structure according to claim 1, characterized in that, The spline (5) is formed by gear hobbing, and the key teeth at the tail (6) end in a gradually withdrawing manner.

5. The spline sleeve sealing structure according to claim 1, characterized in that, The spline sleeve (3) completely covers the tail of the key (6).

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