CN212717667U

CN212717667U - Maintenance-free hub unit for drive axle

Info

Publication number: CN212717667U
Application number: CN202021137226.3U
Authority: CN
Inventors: 李雪亮
Original assignee: Ningbo Zhanxin Automotive Technology Development Co ltd
Current assignee: Ningbo Zhanxin Automotive Technology Development Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-16
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a transaxle is with non-maintaining wheel hub unit, including wheel hub and axletree, the axletree passes through bearing mechanism and rotates the supporting, be provided with the bellied protruding ring of round on wheel hub's the inside wall, bearing mechanism includes the tapered roller bearing that two intervals set up, two tapered roller bearing's outer lane pushes up respectively and leans on the both sides at the protruding ring, and two tapered roller bearing's inner circle pushes up each other and leans on, be provided with the spacing groove on one side that two inner circles pushed up each other respectively, two spacing inslots are detained to a C type clamp, and then with two tapered roller bearing's inner circle fixed connection as an organic whole, the top of two tapered roller bearing's inner circle is leaned on the position and is overlapped and is equipped with the round mount ring, the interval is provided with two seal ring seats on. The utility model discloses direct setting up sealed mode in two inner circle junctions, having improved the sealing performance in two inner circle junctions greatly, stopped inside gear oil of transaxle housing probably through the clearance between bearing hole and the central siphon, pass through again inside the clearance entering bearing between two bearings.

Description

Maintenance-free hub unit for drive axle

Technical Field

The utility model relates to an automobile wheel hub field.

Background

The hub system, which is engaged with the axle, is maintained at intervals to replace components such as brake pads. In maintenance work, the hub needs to be removed from the axle. At present, a single-row tapered roller bearing is mostly adopted in a hub system. Once the wheel hub is detached from the axle, the inner ring of the single-row tapered roller bearing is separated from the outer ring, and the bearing has to be reinstalled when the wheel hub is installed on the axle, which not only brings trouble to the maintenance work of the wheel hub system, but also easily dirties the grease in the bearing. Therefore, the conventional hub system must be serviced for each maintenance. However, even if grease is replaced for the bearing, foreign matter is inevitably introduced into the bearing due to the influence of the field environment, and the life of the bearing is reduced.

To this patent application number be "CN 201711268652.3", the utility model patent of the name "a car and wheel hub bearing unit" discloses a wheel hub structure, and it includes wheel hub and axletree, rotates wheel hub through two sets of bearings that set up on the axletree and supports on the axletree, in addition, for improving sealing performance, gap department between outer bearing inner circle right-hand member and the inner bearing inner circle left end is sealed through first sealing washer.

However, in the above structure, it is difficult to ensure leakage of grease to the bearing roller portion only by the first seal ring. In addition, because the gap that forms between two bearings is in fact because of bearing machining precision, the influence of the machining precision of wheel hub inner bearing frame, it is difficult to guarantee sealing performance when cooperating with the sealing washer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the not enough of existence among the prior art, provide non-maintaining wheel hub unit for transaxle.

The utility model discloses a realize through following technical scheme: a maintenance-free hub unit for a drive axle comprises a hub and an axle, wherein the axle is arranged in the hub and is rotatably supported through a bearing mechanism, a circle of raised ring is arranged on the inner side wall of the hub, the bearing mechanism comprises two tapered roller bearings arranged at intervals, the outer rings of the two tapered roller bearings are respectively propped against the two sides of the raised ring, the inner rings of the tapered roller bearings are fixed with the axle, the inner rings of the two tapered roller bearings are mutually propped against each other, one sides of the two inner rings which are mutually propped against each other are respectively provided with a limiting groove, a C-shaped clamp is buckled into the two limiting grooves, the inner rings of the two tapered roller bearings are fixedly connected into a whole, a circle of mounting ring is sleeved on the propping position of the inner rings of the two tapered roller bearings, two seal ring seats are arranged on the mounting ring at intervals, and are respectively positioned on the inner rings of different tapered roller bearings, and a sealing ring is arranged in the sealing ring seat.

In the technical scheme, the inner rings of the two tapered roller bearings are respectively provided with the chamfered parts, when the two inner rings abut against each other, the positioning groove is formed between the two chamfered parts, the middle part of the inner wall of the mounting ring is provided with a circle of positioning ring, and the positioning ring is positioned in the positioning groove.

In the technical scheme, an oil seal is arranged between the hub and the top wall of the inner ring of the tapered roller bearing.

In the above technical solution, when the outer ring of the tapered roller bearing abuts against the raised ring, the outer ring has an end portion protruding out of the raised ring.

The utility model discloses following beneficial effect has: the utility model discloses direct setting up sealed mode in two inner circle junctions, having improved the sealing performance in two inner circle junctions greatly, stopped inside gear oil of transaxle housing probably through the clearance between bearing hole and the central siphon, pass through again inside the clearance entering bearing between two bearings.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a perspective view of the mounting ring.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 3, the maintenance-free hub unit for a transaxle includes a hub 1 and an axle 2, and the axle 2 is disposed in the hub 1 and rotatably supported by a bearing mechanism.

Specifically, a circle of raised convex ring 10 is arranged on the inner side wall of the hub 1, the bearing mechanism comprises two tapered roller bearings 3 which are arranged at intervals, outer rings 30 of the two tapered roller bearings 3 respectively abut against two sides of the raised ring 10, the inner rings 31 of the tapered roller bearings 3 are fixed with the axle 2, and the inner rings 31 of the two tapered roller bearings 3 are mutually abutted, limiting grooves 31a are respectively arranged on the side where the two inner rings 31 abut against each other, a C-shaped hoop 4 is buckled into the two limiting grooves 31a, so that the inner rings 31 of the two tapered roller bearings 3 are fixedly connected into a whole, a circle of mounting ring 5 is sleeved on the abutting position of the inner rings 31 of the two tapered roller bearings 3, two sealing ring seats 50 are arranged on the mounting ring 5 at intervals, the two sealing ring seats 50 are respectively positioned on the inner rings of different conical roller bearings, and a sealing ring 6 is arranged in each sealing ring seat 50.

In the structure, through the cooperation of the mounting ring 5 and the two sealing rings 6, the sealing mode is directly arranged at the joint of the two inner rings, the sealing performance at the joint of the two inner rings is greatly improved, and gear oil in the driving axle housing is prevented from entering the bearing through the gap between the inner hole of the bearing and the axle tube and the gap between the two bearings.

Preferably, chamfered portions are respectively arranged on the inner rings of the two tapered roller bearings, when the two inner rings abut against each other, a positioning groove 100 is formed between the two chamfered portions, a circle of positioning ring 51 is arranged in the middle of the inner wall of the mounting ring 5, the positioning ring 51 is located in the positioning groove 100, and the structure is favorable for the mounting ring 5 to be capable of being mounted and positioned. An oil seal 7 is provided between the hub and the top wall of the inner ring of the tapered roller bearing to prevent oil from entering the rollers of the tapered roller bearing from the outside.

The outer ring 30 of the tapered roller bearing 3 has an end portion protruding beyond the projecting ring 10 when abutting against the projecting ring 10. In the above structure, the outer ring 30 can be removed from the hub by applying an axially outward force to the end portion.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description of the invention have been provided in the present application for the purpose of illustrating the principles of the invention and is subject to various changes and modifications without departing from the spirit and scope of the invention. All such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. Transaxle is with non-maintaining wheel hub unit, including wheel hub (1) and axletree (2), axletree (2) set up in wheel hub (1), and rotate the support through bearing mechanism, its characterized in that: the bearing mechanism comprises two tapered roller bearings (3) which are arranged at intervals, outer rings (30) of the two tapered roller bearings (3) are respectively abutted against two sides of the raised ring (10), inner rings (31) of the tapered roller bearings (3) are fixed with an axle (2), inner rings (31) of the two tapered roller bearings (3) are abutted against each other, limiting grooves (31 a) are respectively arranged on one sides of the two inner rings (31) which are abutted against each other, a C-shaped clamp (4) is buckled into the two limiting grooves (31 a), the inner rings (31) of the two tapered roller bearings (3) are fixedly connected into a whole, a circle of mounting ring (5) is sleeved on the abutting position of the inner rings (31) of the two tapered roller bearings (3), and two sealing ring seats (50) are arranged on the mounting ring (5) at intervals, the two sealing ring seats (50) are respectively positioned on the inner rings (31) of different conical roller bearings, and the sealing ring (6) is arranged in the sealing ring seats (50).

2. The maintenance-free hub unit for a transaxle of claim 1, wherein: the tapered roller bearing is characterized in that chamfered parts are respectively arranged on inner rings (31) of the two tapered roller bearings, when the two inner rings abut against each other, a positioning groove (100) is formed between the two chamfered parts, a circle of positioning ring (51) is arranged in the middle of the inner wall of the mounting ring (5), and the positioning ring (51) is located in the positioning groove (100).

3. The maintenance-free hub unit for a transaxle of claim 1, wherein: an oil seal (7) is arranged between the hub (1) and the top wall of the inner ring (31) of the tapered roller bearing.

4. The maintenance-free hub unit for a transaxle of claim 1, wherein: the outer ring (30) of the tapered roller bearing (3) has an end portion protruding beyond the projecting ring (10) when abutting against the projecting ring (10).