CN100504086C

CN100504086C - Bearing locking structure

Info

Publication number: CN100504086C
Application number: CNB2007101564887A
Authority: CN
Inventors: 吴泽吉
Original assignee: NINGBO YINGTE HYDRAULICS TRANSMISSION CO Ltd
Current assignee: NINGBO YINGTE HYDRAULICS TRANSMISSION CO Ltd
Priority date: 2007-11-02
Filing date: 2007-11-02
Publication date: 2009-06-24
Anticipated expiration: 2027-11-02
Also published as: CN101149072A

Abstract

The bearing locking structure for locking bearings between the wheel disc and the fixing seat of speed reducer includes one lock nut with conic outer surface, and one pin inserted in the joint between the lock nut and fixing seat, and one lock sleeve outside the lock nut with inner conic surface for fitting the lock nut and outer capped edge fitting the bearing. The bearing locking structure has features of greatly reduced axial size, capacity of shifting the bearings, convenient maintenance, high reliability.

Description

Bearing locking structure

Technical field

The present invention relates to a kind of bearing locking structure, specifically refer to a kind of locking mechanism that is installed in the bearing of speed reducer upper support wheel disc.

Background technique

In present walking (wheel limit) speed reducer, wheel disc normally is bearing on the fixed bearing by two groups of tapered roller bearings or angular contact ball bearing, as shown in Figure 6, wherein, two groups of tapered roller bearings adopt back-to-back mounting type, and its locking mechanism is made up of the locking nut and the lock washer of routine, and locking nut is threaded on the fixed bearing, and be tight against mutually with the inner ring of bearing, utilize lock washer to prevent that locking nut is loosening simultaneously.Above-mentioned bearing locking structure also has the structure that adopts locking nut and pin, locking nut is threaded mutually with fixed bearing equally, and be tight against mutually with the inner ring of bearing, pin is plugged on the threaded connection place of locking nut and fixed bearing, prevents the loosening of locking nut with this.During use, connect firmly mutually with machine tool in conjunction with flange, the weight of working host is delivered on two groups of tapered rollers by wheel disc along line of action F direction, and then is delivered on the fixed bearing by wheel disc.Therefore, adopt above-mentioned two kinds of locking mechanisms, all can realize the fastening and locking purpose of two groups of bearings.

But find in actual applications: because the configuration of the internal structure of speed reducer itself is very compact, space at the bearing locking structure place is less, and locking nut has the height of standard, be that locking nut is after installation, need occupy certain axial dimension, thereby force two groups of right side bearings in the bearing to be offset left, make two groups of bearings at a distance of nearer, finally make the above-mentioned line of force F that does through the right side bearing, the result makes power that the right side bearing born much larger than the left side bearing.That is to say that above-mentioned bearing locking structure can cause two groups of shaft strength inequalities, and the defective that has bearing weak point in working life, speed reducer motion cost height, is difficult to safeguard.

Summary of the invention

Technical problem underlying to be solved by this invention is the present situation at prior art, provides a kind of each shaft strength of speed reducer upper support wheel disc that can make evenly can prolong the bearing bearing locking structure in working life.

The present invention solves the problems of the technologies described above the technological scheme that is adopted: this bearing locking structure is used for locking at the wheel disc of speed reducer and two groups of bearings between the fixed bearing, the pin that it comprises the locking nut that is threaded on the fixed bearing and is plugged on locking nut and fixed bearing threaded connection place, it is characterized in that: the outer surface of described locking nut is designed to outer conical surface, and outside this locking nut, also be with the lock sleeve that is sandwiched between described right side bearing and the locking nut, the endoporus of this lock sleeve has the internal conical surface that is complementary with described locking nut outer surface, and also has the rib that is complementary with bearing exterior edge face, described right side on the outer surface of this lock sleeve.

As a further improvement on the present invention, described lock sleeve preferably has a radial opening, when lock sleeve is installed, pushes the periphery of lock sleeve like this, this radial opening is diminished and cause the reduced diameter of lock sleeve, can make lock sleeve extend into easily between bearing and the fixed bearing this moment.In case and locking nut is when screwing in, again can be under the cooperation of inside and outside conical surface, this radial opening is strutted gradually, the external diameter of lock sleeve increases gradually, lock sleeve is clamped between bearing and fixed bearing, thereby guarantees the locking and positioning of rib to bearing, thereby adopts such opening lock sleeve, can be convenient to install, can guarantee locking function again.

Comparatively useful is, can also design the aperture of operation usefulness on the exterior edge face of locking nut, by means of this aperture, just can realize screwing or unscrewing of locking nut easily.

Compared with prior art, because the present invention adopts the rib on the lock sleeve that bearing is carried out axial limiting, and rib can design thinlyyer as required, axial dimension after it is installed is much smaller than the standard height of former locking nut, therefore by means of the lock sleeve rib remaining space, two groups of right side bearings in the bearing can be moved right, the weight line of action of working host is passed from the centre of two groups of bearings, it is the weight line of action that the right side bearing has departed from working host, thereby guaranteed the uniformity of two groups of shaft strengths effectively, and prolonged working life of bearing, and reduced the motion cost of speed reducer, have easy to maintenance, the characteristics of reliable operation, and in practical probation, obtained beyond thought technique effect, thereby be worth on existing speed reducer, applying.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention;

Fig. 2 is the sectional view of the lock sleeve among Fig. 1;

Fig. 3 is the side schematic view of Fig. 2;

Fig. 4 is the sectional view of locking nut among Fig. 1;

Fig. 5 is the side schematic view of Fig. 4;

Fig. 6 is that existing bearing locking structure is applied in the structural representation in the speed reducer.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

Extremely shown in Figure 5 as Fig. 1, this bearing locking structure is applied on the speed reducer, be used for locking at the wheel disc 2 of speed reducer and two groups of bearings between the fixed bearing 1, its right side is for being installed in the planet carrier 7 on the fixed bearing 1 by spline 6, this bearing locking structure is made up of lock sleeve 4, locking nut 5 and pin 8, wherein, lock sleeve 4 designs have a radial opening 41, its endoporus is internal conical surface, also has a circle rib 42 on the outer surface, sees also Fig. 2 and Fig. 3.And locking nut 5 outer surfaces are designed to the outer conical surface that is complementary with above-mentioned lock sleeve endoporus, as shown in Figure 4 and Figure 5.8 of described pins adopt conventional structure.

When fastening, utilize the radial opening 41 on the lock sleeve earlier, lock sleeve 4 is radially closed up, after dwindling its external diameter, lock sleeve 4 is filled in the space between right side bearing 3 and the fixed bearing 1, the outer surface of lock sleeve is contacted with the inner ring internal surface of right side bearing 3, and the rib 42 of lock sleeve then contacts with the exterior edge face of inner ring; Then, locking nut 5 is threaded on the fixed bearing 1, screws in the process,, lock sleeve 4 is located to live tightly, thereby guaranteed the locking of 4 pairs of two groups of bearings of lock sleeve by means of the cooperation of its outer surface and lock sleeve internal surface at locking nut 1; At last, in order to prevent that in the course of the work becoming flexible of locking nut 5 is drilled with through hole 52 vertically in the screw thread junction of locking nut and fixed bearing, straight pin 8 inserts in these through holes 52, just can prevent the loosening of locking nut 5 effectively.

Rotation for energy easy-to-operat locking nut also designs aperture 51 on the exterior edge face of locking nut 5, here, aperture has designed four altogether, also can be designed to six or five.Instrument by means of routine stretches in this aperture, just can drive the locking nut rotation.

Claims

1, a kind of bearing locking structure, be used for locking the wheel disc (2) that is positioned at speed reducer and two groups of bearings between the fixed bearing (1), it comprises the locking nut (5) that is threaded on the fixed bearing (1) and is plugged on locking nut and the pin of fixed bearing threaded connection place (8), it is characterized in that: the outer surface of described locking nut (5) is designed to outer conical surface, be sandwiched in the lock sleeve (4) that has a radial opening (41) between right side bearing (3) and the locking nut (5) and outside this locking nut, also be with, the endoporus of this lock sleeve has the internal conical surface that is complementary with described locking nut (5) outer surface, and also has the rib (42) that is complementary with right side bearing (3) exterior edge face on the outer surface of this lock sleeve (4).

2, bearing locking structure according to claim 1 is characterized in that: also design the aperture (51) that operation usefulness is arranged on the exterior edge face of described locking nut (5).