CN213419676U - Trimming needle roller bearing - Google Patents

Abstract

The utility model provides a repair type bearing relates to bearing technical field, which comprises an outer ring, the inside holder that is provided with of bearing inner race, the inside of holder is provided with the kingpin, little fillet is taken to the terminal surface of kingpin, and the appearance of "thick" bi "thin" in the middle of the coping becomes, the kingpin produces corresponding elastic strain according to the size of load, it is poor to design into an amount of gradient with both ends size by big to little in the middle of the diameter of kingpin. The problem that the bearing is required to be suitable for equipment operation under the action of light and medium loads in a smaller individual under a working environment with higher temperature is solved, and equipment operation under the action of heavy load or variable load in a short time can be met; this requires that the bearings used have a high load capacity, that peeling caused by stress concentration during operation of the bearings be avoided, and that the problem of temperature rise during operation be reduced.

Description

Trimming needle roller bearing

Technical Field

The utility model relates to a bearing field especially relates to repair type bearing.

Background

Along with the wide application of the current engineering machinery products in production and construction, the change interval of the working load is larger and larger, the working condition of a bearing becomes worse and worse under the action of high-speed continuous operation or short-time impact of variable load, and meanwhile, a large amount of heat cannot be completely and quickly dissipated to the surrounding environment after being generated, so that the working temperature is simultaneously increased; under the conditions of large load, variable load impact and high-temperature working, the service life of the bearing is greatly shortened due to the concentrated contact stress, the damage speed is faster and faster, the maintenance time and cost of the equipment are increased, and the service life of the equipment is shortened.

The bearing is required to be suitable for equipment operation under the action of light and medium loads and meet the requirement of equipment operation under the action of heavy loads or variable loads in a short time by using smaller individuals under a working environment with higher temperature; this requires that the bearings used have a high load capacity, that they avoid flaking due to stress concentrations during operation, and that they have a reduced temperature rise during operation.

Disclosure of Invention

Technical problem to be solved

To prior art not enough, the utility model provides a repair type bearing possesses the better stress concentration of having overcome the kingpin and has reduced the advantage of temperature rise and noise, has solved under heavy load, variable load impact and high temperature operating condition, contact stress concentrates the life-span greatly reduced's that leads to the bearing problem.

(II) technical scheme

For the better purpose of overcoming the stress concentration of kingpin and having reduced temperature rise and noise of realization, the utility model provides a following technical scheme: the modified needle roller bearing comprises an outer ring, wherein a retainer is arranged in the outer ring of the bearing, and a needle roller is arranged in the retainer.

Preferably, a roller groove is formed on the surface of the outer ring.

Preferably, the retainer is movably connected with the outer ring through the needle roller.

Preferably, the end surfaces of the roller pins are small round corners and are polished to be in a shape with a thick middle part and thin two ends.

Preferably, the needle roller generates corresponding elastic strain according to the load.

Preferably, the size of the middle and two ends of the diameter of the roller pin is designed to be a certain gradient difference from large to small.

Preferably, the needle rollers adopt a quantitative profiling radian.

(III) advantageous effects

Compared with the prior art, the utility model provides a repair type bearing possesses following beneficial effect:

1. when the roller pin rotates at a high speed under the action of medium and light loads, the roller pin is used as a bearing body, and a small-area part mainly comprising the middle part is in contact with the roller path, so that the temperature rise and the noise are reduced;

2. under the impact action of large load or variable load, the needle rollers generate gradient elastic strain from the middle part to the two ends and generate matched corners along with the deflection of the shaft, so that the stress concentration of the needle rollers is better overcome.

3. Under the action of ultimate load, the roller pin can still be ensured not to contact with the edge of the outer raceway (the sharp point of the tool withdrawal groove) when generating maximum strain, and the stress peeling damage generated at the position is avoided.

Drawings

Fig. 1 is a sectional view of the general assembly of the modified needle roller bearing of the present invention;

FIG. 2 is a half-sectional view of the outer ring of the modified needle roller bearing of the present invention;

fig. 3 is a schematic structural view of the needle roller in the modified needle roller bearing of the present invention;

fig. 4 is a schematic structural view of a retainer in the modified needle roller bearing of the present invention.

Illustration of the drawings:

1. an outer ring; 2. a holder; 3. and (4) rolling needles.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1-4, the modified needle roller bearing comprises an outer ring 1, a retainer 2 is arranged in the outer ring 1 of the bearing, and needle rollers 3 are arranged in the retainer 2.

Further, a cutter groove is formed on the surface of the outer ring 1.

Furthermore, the retainer 2 is movably connected with the outer ring 1 through the needle rollers 3.

Furthermore, the end surface of the needle roller 3 is a small round angle and is polished into a shape with a thick middle part and thin two ends, so that the change trend force of the deflection generated by the shaft can be better adapted under the action of bearing or impact load, and the phenomenon of high concentration of contact stress is avoided.

Furthermore, the needle rollers 3 generate corresponding elastic strain according to the load, so that the contact surface between the needle rollers 3 and the raceway is always the minimum and reasonable, and the temperature rise in the bearing rotation process is reduced as much as possible.

Furthermore, the size of the middle and two ends of the diameter of the roller pin 3 is designed to be a certain gradient difference from large to small, so that the strain generated by the load is mainly generated by the middle and is generated by the two ends, the contact stress generated by the two ends of the roller pin 3 and the roller path is better avoided and reduced, the strain generated by the roller pin due to bearing is better and reasonably dispersed, and the bearing capacity and the service life are improved.

Furthermore, the roller pins 3 adopt quantitative profiling radians, so that stress concentration of the roller pins 3 under any working condition can be reduced, and the bearing capacity and the service life of the bearing are greatly improved.

The utility model discloses a theory of operation and use flow: when the bearing is subjected to medium, small and impact loads, the part with the largest diameter of the roller pin 3 firstly bears the compressive stress, the strain generated by the roller pin 3 along with the change of the load is increased or reduced along an arc-shaped bus from the middle, the small fillets at two ends and the large radian in the middle effectively avoid the stress concentration phenomenon, and under the action of the ultimate load, the roller pin 3 is compressed to the ultimate limit, so that the surface of the roller pin 3 does not generate larger stress with the edge of an outer raceway (the sharp point of a tool withdrawal groove) when the diameter of the roller pin 3 is compressed to the maximum, and the bearing capacity and the service life of the bearing are effectively improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. Repair type bearing, including outer lane (1), its characterized in that: a retainer (2) is arranged in the outer ring (1), and a roller pin (3) is arranged in the retainer (2);

the end surfaces of the rolling needles (3) are small round corners and are polished into a shape with a thick middle part and thin two ends.

2. The modified needle bearing of claim 1, wherein: the surface of the outer ring (1) is provided with a hobbing groove.

3. The modified needle bearing of claim 1, wherein: the retainer (2) is movably connected with the outer ring (1) through the needle roller (3).

4. The modified needle bearing of claim 1, wherein: the size of the middle and two ends of the diameter of the roller pin (3) is designed to be a certain gradient difference from large to small.

5. The modified needle bearing of claim 1, wherein: the rolling needles (3) adopt quantitative profiling radians.

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