CN201951171U

CN201951171U - Double-bearing universal wheel

Info

Publication number: CN201951171U
Application number: CN2011200265644U
Authority: CN
Inventors: 江泽飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-26
Filing date: 2011-01-26
Publication date: 2011-08-31
Anticipated expiration: 2021-01-26

Abstract

The utility model relates to a double-bearing universal wheel, which comprises an erect steering shaft. The upper part of the steering shaft is sleeved with a radial bearing, and the lower part of the steering shaft is sleeved with a thrust bearing; the radial bearing and the thrust bearing are positioned in a bearing installation hole of a bearing seat; the bearing installation hole is a stepped hole; and the upper end face of the thrust bearing is pressed against a first step of the stepped hole. The first step of the bearing installation hole is used for bearing the axial load of the thrust bearing, so that the radial bearing cannot be subjected to the pressure of the thrust bearing and can be prevented from being damaged prematurely.

Description

The duplex bearing cardan wheel

Technical field

The utility model relates to a kind of cardan wheel, especially relates to a kind of duplex bearing cardan wheel.

Background technology

A kind of cardan wheel that adopts duplex bearing is arranged in all kinds of cardan wheels.This cardan wheel is equipped with two bearings on steering shaft, one is the thrust baring that bears axial load, and another is the radial bearing that bears radial weight.The bearing installation mode of known this cardan wheel is reasonable inadequately at present, radial bearing is damaged, for example, " bearing felt formula heavy lift Universal castor " (utility model patent, application number: CN200620154354.2) in the disclosed cardan wheel, although between surface bearing (being thrust baring) and radial ball bearing (being radial bearing), be provided with jump ring, but jump ring only plays the effect that prevents that radial ball bearing from dropping downwards, jump ring can not bear the axial load that surface bearing upwards transmits, under Axial Loads, surface bearing must upwards push radial bearing, causes the radial bearing early failure.

The utility model content

At the problems referred to above that prior art exists, the utility model provides a kind of duplex bearing cardan wheel, can avoid radial bearing to be subjected to axle pressure.

Specifically, the utility model provides a kind of duplex bearing cardan wheel, the steering shaft that comprises a setting, the top of steering shaft is with radial bearing, the bottom of steering shaft is with thrust baring, radial bearing and thrust baring are positioned at the bearing mounting hole on the bearing seat, and bearing mounting hole is a stepped hole, and the upper surface of thrust baring withstands on the first step of stepped hole.

One of them scheme is that the outer wall at radial bearing is provided with annular groove, being stuck in interior week in this annular groove of first jump ring, and the first jump ring support is on the second step of stepped hole.

Another scheme is that the inwall at bearing seat is provided with annular groove, and the periphery of second jump ring is stuck in the annular groove of bearing seat inwall, and the lower surface support of radial bearing is on second jump ring.

Bearing seat is provided with fill orifice, is used to pour into lubricating oil.

Steering shaft and radial bearing interference fit.

Compared with prior art, the beneficial effects of the utility model are:

Bearing mounting hole in the utility model adopts stepped hole, and the axial load by the step bearing thrust bearing of bearing mounting hole makes progress makes radial bearing can not be subjected to the pressure of thrust baring, thereby avoids the radial bearing early failure.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the utility model embodiment two.

Reference numeral:

1. steering shaft 2. radial bearings 3. thrust barings 4. bearing seats

5. fill orifice 6. rotor plates 7. feets 8. adapter plates

9. first step 10. first jump rings 11. second jump rings 12. bearing mounting holes

13. second step

The specific embodiment

Embodiment one

Referring to Fig. 1, the duplex bearing cardan wheel comprises the steering shaft 1 of a setting, and the top of steering shaft 1 is with radial bearing 2, and the bottom of steering shaft 1 is with thrust baring 3, and radial bearing 2 and thrust baring 3 are enclosed within the bearing mounting hole of a bearing seat 4 together.Offer the fill orifice 5 of lubricating oil on the bearing seat 4.The inwall interference fit of steering shaft 1 and radial bearing 2, the lower end of steering shaft 1 is welded on the rotor plate 6, and rotor plate 6 welds with the feet 7 of roller.Rotor plate 6 makes progress roof pressure on the lower surface of thrust baring 3.Bearing seat 4 is welded on the adapter plate 8.Bearing mounting hole 12 on the bearing seat 4 is a stepped hole, and the upper surface of thrust baring 3 withstands on the first step 9 of stepped hole.

For preventing that steering shaft 1 drops with radial bearing 2 when roller is liftoff, offer annular groove at the outer wall of radial bearing 2, being stuck in interior week in this annular groove of first jump ring 10, first jump ring, 10 supports are on the second step 13 of stepped hole.

Embodiment two

Embodiment two as shown in Figure 2, offers annular groove at the inwall of bearing seat 4 as the further improvement of embodiment one, and the periphery of second jump ring 11 is stuck in the annular groove on the inwall of bearing seat 4, and the lower surface support of radial bearing 2 is on second jump ring 11.

Compare with embodiment one, the stepped hole in the bearing mounting hole 12 among the embodiment two saves second step 13, and need not to offer annular groove at the outer wall of radial bearing 2, processes more convenient.Other structures among the embodiment two are identical with embodiment one.

As shown in Figure 2, compare with the prior art described in the background technology, in the present embodiment, though second jump ring 11 is also between radial bearing 2 and thrust baring 3, but the axial force that makes progress that thrust baring 3 is born can not act on the radial bearing 2 by second jump ring 11, but the axial load that makes progress by the first step 9 bearing thrust bearings 3 of bearing mounting hole 12, radial bearing 2 can not be subjected to the extruding of thrust baring 3, avoids radial bearing 2 early failure.

Claims

1. duplex bearing cardan wheel, the steering shaft (1) that comprises a setting, the top of steering shaft (1) is with radial bearing (2), the bottom of steering shaft (1) is with thrust baring (3), radial bearing (2) and thrust baring (3) are positioned at the bearing mounting hole (12) on the bearing seat (4), it is characterized in that: bearing mounting hole (12) is a stepped hole, and the upper surface of thrust baring (3) withstands on the first step (9) of stepped hole.

2. duplex bearing cardan wheel as claimed in claim 1 is characterized in that: the outer wall of radial bearing (2) is provided with annular groove, being stuck in interior week in the annular groove of first jump ring (10), and first jump ring (10) support is on the second step (13) of stepped hole.

3. duplex bearing cardan wheel as claimed in claim 1, it is characterized in that: the inwall of bearing seat (4) is provided with annular groove, the periphery of second jump ring (11) is stuck in the annular groove of inwall of bearing seat (4), and the lower surface support of radial bearing (2) is on second jump ring (11).

4. duplex bearing cardan wheel as claimed in claim 1 is characterized in that: bearing seat (4) is provided with fill orifice (5).

5. as each described duplex bearing cardan wheel of claim 1 to 4, it is characterized in that: steering shaft (1) and radial bearing (2) interference fit.