CN105090242B - A pin type bearing cage and tapered roller bearing - Google Patents

Abstract

The utility model provides a wear round pin formula bearing holder and tapered roller bearing, the bearing holder includes first ring, second ring and connects a plurality of round pins between first ring and second ring, round pin axle and first ring at first tie point fixed connection, with second ring at second tie point fixed connection, the round pin axle still includes at least one elastic component for making distance between first tie point and the second tie point can change. When the bearing using the retainer works under the condition of high load, once impact load occurs, the pin shaft can generate elastic buffering to a certain degree through the deformation of the elastic part, so that the pressure peak value caused by the impact load is reduced, and the possibility that the retainer is damaged by the impact load is reduced.

Description

A pin type bearing cage and tapered roller bearing

technical field

The present invention relates to a bearing cage, in particular to a pin type bearing cage and a tapered roller bearing including the pin type bearing cage.

Background technique

Bearing cage, also known as bearing retainer, refers to a bearing part that partially wraps all or part of the rolling body and moves with it to isolate the rolling body, usually guide the rolling body and keep it in the bearing. When the rolling bearing is working, the bearing heats up and wears due to friction. Especially under high temperature operation conditions, the effect of inertial centrifugal force aggravates the friction, wear and heat. At the same time, when the bearing is running under a high load state, the bearing cage will also bear a large working load and shocks caused by factors such as vibration. Tapered roller bearings are separable bearings, and both the inner and outer rings of the bearing have tapered raceways. Single row tapered roller bearings can withstand radial loads and axial loads in one direction. When the bearing is subjected to radial load, an axial component force will be generated.

Therefore, the cage of the tapered roller bearing is often in a high-load working state, and the pin-type cage (as shown in Figure 1) is at both ends of the pin shaft, which is prone to rupture and damage, resulting in overall damage to the bearing.

Chinese Patent No. 201020300478.3 discloses a cage for tapered roller bearings. The cage is composed of a pin shaft and a plate-shaped annular cage at both ends of the pin shaft. Tapered rollers are installed in the cage, and each tapered roller has a The central hole, the pin shaft passes through the central hole of the tapered roller, the plate-shaped annular cage is placed on the two end faces of the tapered roller, one side of the pin shaft is riveted with the first plate-shaped annular cage, and the other side is connected with the second plate-shaped annular cage. The ring cage is threaded.

However, since the pin shaft in the above-mentioned cage is rigidly and fixedly connected with the plate-shaped annular cages on both sides, the impact load will be directly transmitted between the various components, which can easily cause the cage to be damaged at both ends of the pin shaft, especially by riveting. end damage, which in turn leads to bearing damage.

Therefore, there is a need to provide a pin type bearing cage with an improved structure to solve the above problems.

SUMMARY OF THE INVENTION

The problem solved by the present invention is to improve the impact resistance of the pin-type cage of the large-load bearing.

In order to solve the above problems, the present invention provides a bearing cage, comprising a first ring, a second ring and a plurality of pin shafts connected between the first ring and the second ring, the pin shafts and the first ring are in the first ring. A connection point is fixedly connected, and is fixedly connected with the second ring at the second connection point. The pins are changed.

Preferably, the elastic portion is configured as a metal bellows, and the metal bellows is coaxial with the pin shaft.

Preferably, the pin shaft includes two half-pin shafts, and the metal bellows is coaxially arranged between the two half-pin shafts.

Preferably, both ends of the metal bellows have an axial cylindrical depression respectively, and the two half-pins have an axial cylindrical protrusion facing each end of the metal bellows, respectively. The cylindrical protrusion can be fitted into the cylindrical depression.

Preferably, the diameter of the metal bellows is the largest in the middle, and gradually decreases symmetrically toward both ends along the axial direction, and can deform along the axial direction and the radial direction.

Preferably, the stiffness of the metal corrugated pipe and the maximum support force it can provide can be adjusted by increasing or decreasing the wave number of the metal corrugation, the wall thickness of the corrugated pipe and the number of layers.

At the same time, the present invention also provides a tapered roller bearing, which includes an inner ring, an outer ring and a conical rolling body, as well as the above bearing cage.

Compared with the prior art, the present invention has the following advantages: when working under high load, once the load shock occurs, the pin shaft can generate a certain degree of elastic buffering through the deformation of the elastic part, thereby reducing the impact caused by the load shock. Pressure peaks, reducing the possibility of cage being damaged by load shocks.

Description of drawings

1 is a schematic diagram of a cage of a tapered roller bearing in the prior art;

Fig. 2 is the cage schematic diagram of the tapered roller bearing of the present invention;

Fig. 3 is a partial enlarged view of the cage of the tapered roller bearing shown in Fig. 2;

FIG. 4 is a partially exploded enlarged view of the cage of the tapered roller bearing shown in FIG. 2 .

Detailed ways

As shown in FIG. 2 and FIG. 3 , the bearing cage of the present invention includes a first ring 1 , a second ring 2 and a plurality of pins 3 connected between the first ring 1 and the second ring 2 , the pins 3. It is fixedly connected with the first ring 1 at the first connection point 1.1, and is fixedly connected with the second ring 2 at the second connection point 2.1. The pin shaft 3 consists of two half-pin shafts (3.1, 3.2) with the same diameter The metal bellows 3.3 is formed, the metal bellows 3.3 is located between the two half-pin shafts, and the two ends are respectively connected with the two half-pin shafts, thereby forming a complete pin shaft 3 .

The pin 3 and the first ring 1 are fixed at the first connection point 1.1 by welding, riveting, etc.; and the second ring 2 is fixed at the second connection point 2.1 by a threaded structure or bolts.

As shown in FIG. 4 , both ends of the metal bellows 3.3 have an axial cylindrical recess 3.31 respectively, and the two half-pins have an axial cylindrical recess 3.31 at each end of the metal bellows 3.3 respectively. Protrusions (3.11, 3.21), the cylindrical protrusions are slightly smaller in diameter than the cylindrical depressions, so that the cylindrical protrusions can be fitted into the cylindrical depressions, so that the metal bellows and the The two half-pin shafts (3.1, 3.2) cooperate to form a complete pin shaft 3.

As shown in Figures 3 and 4, the diameter of the metal bellows 3.3 is the largest in the middle, and gradually decreases symmetrically toward both ends along the axial direction. The metal bellows 3.3 can be deformed in the axial direction, especially because it is Compression produces deformation, and through the deformation, a greater support force is generated along the axial direction to the half-pin shafts at both ends. When the bearing is subjected to an axial load impact during operation, the impact will be transmitted to the metal bellows 3.3 along a half-pin shaft, resulting in deformation of the metal bellows 3.3, and in the process of deformation, the two The end-half pin produces increased support to counteract load shocks. Since the supporting force generated by the metal bellows 3.3 is gradually increased during the offset process, the peak supporting force of the cage is reduced.

The stiffness of the metal bellows 3.3 and the maximum support force it can provide can be adjusted by increasing or decreasing the wave number of its metal corrugations, the wall thickness of the bellows and the number of layers.

While the present invention has been described in terms of certain exemplary embodiments only, these descriptions are intended to be by way of example only and not of limitation. Various changes are possible within the scope of the appended claims without departing from the spirit and scope of the invention.

Claims (5)

1. a kind of drift-pin type bearing retainer including the first ring, the second ring and is connected to multiple between the first ring and the second ring Pin shaft, the pin shaft are fixedly connected with the first ring in the first tie point, are fixedly connected with the second ring in the second tie point, feature Be, the pin shaft includes at least one elastic portion, the elastic portion for make first tie point and the second tie point it Between distance can change along the pin shaft；The elastic portion is arranged to metal bellows, the metal bellows and institute State pin shaft coaxial arrangement；The pin shaft includes two and half pin shafts, and the metal bellows is co-axially located at described two half pin shafts Between.

2. bearing retainer as described in claim 1, which is characterized in that the both ends of the metal bellows are respectively provided with one Each end of axial cylindrical recess, described two half pin shafts towards metal bellows is respectively provided with the cylindric convex of an axial direction Out, the cylindric protrusion is able to cooperate the insertion cylindrical recess.

3. bearing retainer as described in claim 1, which is characterized in that the diameter of the metal bellows is intermediate maximum, It is symmetrically gradually reduced along axial toward both ends, it can deformation occurs both axially and radially.

4. bearing retainer as described in claim 1, which is characterized in that the rigidity of the metal bellows is capable of providing with it Maximum holding power, can be adjusted by increasing and decreasing the wave number of the metal bellows.

5. a kind of tapered roller bearing, including inner ring, outer ring and conical rolling element, it is characterised in that further include claim Any one bearing retainer in 1 to 4.