Shaft end fixing structure of light vehicle

Abstract

The utility model discloses an axle end fixing structure of a light vehicle, which comprises an axle and a hub rotationally matched with the axle through a bearing, and is characterized by further comprising a locking component, the locking assembly comprises a shaft head nut and a retaining washer; an internal thread is arranged on the inner diameter surface of the axle head nut, the internal thread is matched with an external thread on an axle, and a plurality of axle head nut threaded holes are further formed in the axle head nut; the retaining washer is annular, a clamping boss matched with a key groove in an axle is inwards arranged on the retaining washer, and a plurality of washer through holes are further formed in the retaining washer. And the retaining washer is fixedly connected with the shaft head nut through a bolt. The double-row tapered roller bearings are adopted in the structure and the shaft end structure, pretightening force adjustment is not needed, one-time installation is achieved through locking of the shaft head nut, rapid assembly is achieved, operation efficiency is improved, and the risk of loosening of the shaft head nut is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle structures, in particular to an axle end fixing structure of a light vehicle. Background Art

[0002] The axle assembly of a vehicle with a full-floating rear axle generally includes an axle and a wheel hub installed at the end of the axle. The wheel hub is installed on the axle through an inner bearing and an outer bearing. Normally, in order to prevent the outer bearing from moving, a locking nut needs to be provided at the end of the axle. Specifically, an external thread is provided at the end of the axle, and the locking nut is screwed onto the external thread. The locking nut is used to tighten the outer end face of the outer ring of the outer bearing. However, in order to prevent the locking nut from loosening during vehicle driving, the locking nut is generally configured as a locking assembly with a self-locking function. The existing locking assembly generally includes a washer, a shaft head nut, a retaining spring, etc. In the existing structure, it is necessary to provide a keyway on the part with an external thread on the axle, clamp the washer on the keyway, and clamp it on the shaft head nut with a retaining spring. After tightening the shaft head nut, the shaft head nut and the washer are clamped together with the retaining spring to prevent the shaft head nut from rotating relative to the washer. Although it can achieve the purpose of preventing the shaft head nut from loosening, due to the large number of parts and the need to provide a keyway and retaining spring groove on the axle, and at the same time, a structure that is mutually engaged with the retaining spring is configured on the shaft head nut and the washer, the entire shaft end structure is relatively complicated. In addition, it is necessary to adjust the clearance of the outer bearing during assembly, and the assembly process is relatively cumbersome. Utility Model Content

[0003] The purpose of the utility model is to provide an axle end fixing structure for a light vehicle, which has a simple structure and is easy to assemble, so as to solve the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: an axle end fixing structure for a light vehicle, comprising an axle and a wheel hub rotatably engaged with the axle through a bearing, characterized in that it also includes a locking assembly; the locking assembly includes a shaft head nut and a retaining washer;

[0005] An internal thread is provided on the inner diameter surface of the shaft head nut, which matches the external thread on the axle, and a plurality of shaft head nut threaded holes are also provided on the shaft head nut;

[0006] The backstop washer is annular, and is provided with a clamping boss inwardly that matches the keyway on the axle. A plurality of washer through holes are also provided on the backstop washer; the backstop washer is fixedly connected to the shaft head nut by bolts.

[0007] Furthermore: it also includes an external oil seal; the outer diameter surface of the external oil seal matches the inner surface of the wheel hub, and the lip matches the end of the axle.

[0008] Furthermore: there are two groups of clamping bosses, which are symmetrically arranged.

[0009] Furthermore: the bearing is a double-row tapered roller bearing.

[0010] Furthermore: there are eight threaded holes in the shaft head nut and eighteen through holes in the washer.

[0011] The beneficial effects of the present invention are as follows: the shaft end structure of the present invention adopts a double-row tapered roller bearing, eliminating the need for preload adjustment and enabling one-time installation by locking the shaft head nut, thereby achieving rapid assembly, improving work efficiency, and preventing the risk of the shaft head nut loosening. Disposable parts such as the retaining spring in conventional locking assemblies are eliminated, and the locking assembly of the present invention can be reused during disassembly and maintenance, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle shaft head nut;

[0016] Figure 4 yes Figure 1 Schematic diagram of the structure of the stop-retraction washer.

[0017] Explanation of the serial numbers in the figure: 10 axle, 20 wheel hub, 21 bearing, 30 locking assembly, 31 spindle head nut, 32 retaining washer, 33 bolt, 40 external oil seal, 101 external thread, 102 keyway, 311 spindle head nut threaded hole, 321 clamping boss, 322 washer through hole. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-4 As shown, the utility model discloses an axle end fixing structure for a light vehicle, comprising an axle 10, a wheel hub 20 rotatably engaged with the axle 10 via a bearing 21, and a locking assembly 30; the locking assembly 30 comprises a spindle nut 31 and a backstop washer 32; the spindle nut is screwed onto the axle and abuts against the inner ring of the bearing to provide stability therefor; the backstop washer is fixed to the spindle nut after it is tightened into place and engages with the keyway to prevent rotation;

[0020] The inner surface of the shaft head nut 31 is provided with an internal thread, which is threadedly matched with the external thread 101 on the axle 10. A plurality of shaft head nut threaded holes 311 are evenly arranged on the end surface of the shaft head nut 31.

[0021] The anti-recognition washer 32 is annular, and a snap-fitting boss 321 is provided inwardly of the ring body to cooperate with the keyway 102 on the axle 10. A plurality of washer through holes 322 are also provided on the anti-recognition washer 32. The anti-recognition washer 32 and the shaft head nut 31 are fixedly connected by bolts 33 passing through the shaft head nut threaded hole and the washer through hole. The number of the two types of holes is different to ensure that the holes can be aligned in as many positions as possible.

[0022] Preferably, an outer oil seal 40 is further included; the installation method of the outer oil seal 40 is the same as that of the prior art, with its outer diameter surface matching the inner surface of the hub 20 and its lip matching the end of the axle 10 .

[0023] Preferably, there are two groups of the clamping bosses 321, which are symmetrically arranged and correspond to the key slots respectively.

[0024] Preferably, the bearing 21 is a double-row tapered roller bearing.

[0025] Preferably, the number of the shaft head nut threaded holes 311 is eight, and the number of the washer through holes 322 is eighteen.

[0026] Preferably, the bolt is a hexagonal head bolt with a spring washer combination.

[0027] The present invention is further described below by way of examples. Example

[0028] This embodiment provides an axle end structure for a light vehicle, which includes an axle 10, a wheel hub 20, a bearing 21, and a locking assembly 30. The end of the axle 10 forms an axle head portion with a circular cross-section. The wheel hub 20 is mounted on the axle head portion at the end of the axle 10 through the bearing 21 so that the wheel hub 20 can rotate around the axle 10; an external thread 101 is provided on the outer circumferential surface of the axle 10 that passes through the bearing 21, and two key grooves 102 are provided at the external thread 101, and the key grooves 102 extend inward from the outer end surface of the axle 10. The locking assembly 30 includes a shaft head nut 31, a backstop washer 32, and a bolt 33. The shaft head nut 31 is screwed onto the external thread 101 of the axle 10 and abuts against the outer end face of the inner ring of the bearing 21. The backstop washer 32 is sleeved on the axle 10 and pressed onto the outer face of the shaft head nut 31. Two clamping bosses 321 are further provided on the backstop washer 32. The clamping bosses 321 are placed in the keyway 102. The clamping bosses and the keyway 102 cooperate to form a first limiting assembly. The first limiting assembly is used. To prevent the backlash washer 32 from rotating relative to the axle 10, 8 threaded holes 311 are provided on the shaft head nut, and 18 washer through holes 322 are provided on the backlash washer. Two bolts 33 are placed in two diagonal directions and pass through the washer through holes 322 to be screwed on the threaded hole 311 of the shaft head nut 31, forming a second limiting assembly. The second limiting assembly is used to limit the rotational freedom of the shaft head nut 31. The outer oil seal 40 is installed to the step hole of the outer oil seal of the wheel hub and is placed on the outside of the locking assembly to play a sealing role.

[0029] In the structure of the present invention, the spindle nut 31 and the backstop washer 32 are sequentially sleeved onto the axle 10 from the end of the axle 10, and the spindle nut 31 is screwed onto the external thread 101. By applying a tightening torque to the spindle nut 31, the bearing 21 can be locked. Since two symmetrical clamping bosses 321 are provided on the backstop washer, the backstop washer and the axle can be clamped more securely. A bolt is screwed onto the spindle nut 31 to fix the backstop washer and the spindle nut together to prevent the spindle nut from loosening.

Claims

1. An axle end fixing structure for a light vehicle, comprising an axle (10), and a wheel hub (20) rotatably engaged with the axle (10) via a bearing (21), characterized in that: Also included is a locking assembly (30); The locking assembly (30) includes a shaft head nut (31) and a retaining washer (32); An internal thread is provided on the inner diameter surface of the shaft head nut (31), and the internal thread cooperates with the external thread (101) on the axle (10). A plurality of shaft head nut threaded holes (311) are also provided on the shaft head nut (31); The backstop washer (32) is annular and has an inwardly provided engaging boss (321) that matches a keyway (102) on the axle (10). A plurality of washer through holes (322) are also provided on the backstop washer (32). The backstop washer (32) is fixedly connected to the shaft head nut (31) by bolts (33). The backstop washer (32) is sleeved on the axle (10) and is pressed onto the outer surface of the shaft head nut (31). It also includes an outer oil seal (40); the outer diameter surface of the outer oil seal (40) matches the inner surface of the wheel hub (20), and the lip matches the end of the axle (10); The clamping bosses (321) are provided in two groups and are symmetrically arranged; The bearing (21) is a double-row tapered roller bearing; There are eight shaft head nut threaded holes (311) and eighteen washer through holes (322).

Images