CN205047789U - Limit subtracts axial of bearing and prevents moving back mechanism - Google Patents

Abstract

The utility model relates to a limit subtracts axial of bearing and prevents moving back mechanism, subtract the casing including the limit, the limit subtracts and sets up the end ring in the shaft hole of casing the shaft hole outside that the limit subtracts the casing sets up two at least spring pin subassemblies, the spring pin subassembly includes key seat and round pin axle, round pin axle through the spring with the key seat is connected, the round pin axle load tightly is in on the terminal surface of end ring. The utility model discloses a limit subtracts spring pin subassembly on the casing and compresses tightly the end ring and prevent its axial displacement to make end ring locking limit subtract the bearing, it is poor that preventing of subtracting above the solution market that can be fine that bearing axial fastener exists moves back locking effect, finally leads to the limit to subtract the problem of bearing and frontier inspection gear distress.

Description

A kind of limit subtracts the axial retreating prevention mechanism of bearing

Technical field

The utility model relates to the component of transmission device of harvester, and particularly a kind of limit subtracts the axial retreating prevention mechanism of bearing.

Background technique

At present when country greatly develops agricultural, domestic agricultural machinery enterprise emerges like the mushrooms after rain one after another, but the relatively international agricultural machinery of the total quality of domestic agricultural machinery still slightly falls behind, wherein subtract maintenance this part with regard to limit in annual very important market service and account for very large component.On Domestic market cropper limit subtract input connecting end bearing all by round nut come fastening, exactly by increase a round nut and between two round nuts increase a round nut lock washer reach the locking object of anti-back.Locking mechanism work a period of time round nut that this limit subtracts easily loosens, thus cause limit to subtract bearing swash, splined two transmission shaft coaxality step-downs and then cause limit to subtract bearing damage or limit subtracts gear failure, light then need more to change sides and subtract bearing or limit and subtract gear and even more change sides and subtract, heavy then tire one end transmission failure, car load spins suddenly or turns on one's side and accidents caused.Therefore, need to provide a kind of limit to subtract the axial retreating prevention mechanism of bearing.

Summary of the invention

The purpose of this utility model is to provide the axial retreating prevention mechanism that a kind of limit subtracts bearing, the resilient key assembly subtracted on housing by limit is compressed end ring and prevents it from moving axially, thus make end ring locking limit subtract bearing, can be good at solving top, market, to subtract the anti-back anti-loosing effect that bearing shaft exists to securing means poor, finally causes limit to subtract the problem of bearing and frontier inspection gear failure.

The purpose of this utility model is realized by following technical proposals: a kind of limit subtracts the axial retreating prevention mechanism of bearing, comprise limit and subtract housing, in the axis hole that described limit subtracts housing, end ring is set, axis hole arranged outside at least two resilient key assemblies of housing are subtracted on described limit, described resilient key assembly comprises key seat and bearing pin, described bearing pin is connected with described key seat by spring, and described bearing pin is pressed on the end face of described end ring.

Preferably, described bearing pin subtracts the diameter line setting of the axis hole of housing along described limit.

Preferably, the axis hole that described limit subtracts housing is provided with internal thread, and the outer surface of described end ring is provided with outside thread, and the axis hole that described end ring subtracts housing with described limit is threaded.

Preferably, the end face of described end ring is provided with multiple groove, and described groove is corresponding with described bearing pin to be arranged.

Preferably, the end face of described end ring is provided with ring gear.

Preferably, described multiple resilient key assembly is circumferentially equidistantly arranged.

The utility model compared with prior art tool has the following advantages:

The utility model is time saving and energy saving when not only allowing workman assemble and dismantle, enhance productivity, most importantly can be good at locking limit subtract bearing and reach the object of anti-back, ensure that limit subtracts the normal transmission of transmission shaft, avoid limit and subtract the damage that bearing and limit subtract gear, decrease limit and subtract a series of maintenance problems that replacing and car load rollover accident etc. cause.

Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.

Accompanying drawing explanation

Fig. 1 is the structural representation of embodiment one;

Fig. 2 be embodiment one disassemble schematic diagram.

Embodiment

Embodiment one:

See Fig. 1, a kind of limit subtracts the axial retreating prevention mechanism of bearing, comprise limit and subtract housing 1, in the axis hole 2 that described limit subtracts housing, end ring 3 is set, axis hole arranged outside at least two resilient key assemblies of housing are subtracted on described limit, described resilient key assembly comprises key seat 4 and bearing pin 5, and described bearing pin is connected with described key seat by spring, and described bearing pin is pressed on the end face of described end ring.

See Fig. 2, in the present embodiment, the axis hole 2 that described limit subtracts housing subtracts transmission shaft 6 for installing limit, subtracts bearing 7 install while subtract transmission shaft with this axis hole by limit.Described end ring 3 is ring, and one end is pressed on limit and subtracts on the outer ring of bearing 7, and its other end is compressed by described bearing pin 5.

See Fig. 2, in the present embodiment, two resilient key assemblies are fixed on limit and subtract on housing 1, and described resilient key assembly comprises key seat 4 and bearing pin 5, described bearing pin is connected with described key seat by spring (not shown), and bearing pin Compress Spring can be retracted in key seat.

During assembling, telescopic bearing pin 5 is retracted in key seat 4, end ring 3 to load in axis hole 2 that limit subtracts housing and holds out against the outer ring that limit subtracts bearing 7, then discharge bearing pin, bearing pin resets and compresses end ring under the elastic force of spring, prevents end ring from moving axially the object that can reach anti-back.Unless this fastening structure bearing pin fracture, otherwise end ring would not get loose, but the axial force itself that limit subtracts bearing is little, so bearing pin can not rupture.So just can ensure the coaxality of spline joint transmission shaft, thus extend the life-span that limit subtracts.And the assembling of this mechanism is very simple, for workman saves a lot of man-hour, greatly enhances manufacturing efficiency.

More specifically, described bearing pin 5 subtracts the diameter line setting of the axis hole 2 of housing along described limit.Multiple bearing pin points to the axis hole center that limits subtract housing, make the stressed of end ring 3 evenly.

End ring and limit subtract the assembling between the axis hole of housing, very high to the requirement on machining accuracy of end ring, otherwise end ring subtracts in the axis hole of housing can shake on limit, affect the stability that limit subtracts transmission.Further, the axis hole 2 that described limit subtracts housing is provided with internal thread, and the outer surface of described end ring 3 is provided with outside thread, and the axis hole that described end ring subtracts housing with described limit is threaded.The mode be threaded both reduced difficulty of processing, in turn ensure that the firm of mounting structure.

Further, the end face of described end ring 3 is provided with multiple groove, and described groove is corresponding with described bearing pin to be arranged.To subtract in the axis hole of housing on limit for preventing end ring and rotate, wearing and tearing limit subtracts bearing, is snapped in the groove on end ring by bearing pin, limits the rotation of end ring.

For ensureing the contraposition of bearing pin and groove, there is specific requirement to the screw-in angle of end ring, assembling up inadequate simplification.Further, the end face of described end ring 3 is provided with ring gear 8.Ring gear is that the domain of end ring is covered with tooth all uniformly, forms groove, for coordinating with bearing pin between adjacent two teeth.

More specifically, described multiple resilient key assembly is circumferentially equidistantly arranged.Subtract bearing according to limit and be subject to the quantity that axial force size suitably can increase resilient key assembly, multiple resilient key assembly is uniformly distributed that to make limit subtract bearing each point stressed more even, ensures that limit subtracts the stability of transmission.

Content disclosed in embodiment is only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.

Claims (6)

1. a limit subtracts the axial retreating prevention mechanism of bearing, comprise limit and subtract housing, it is characterized in that: in the axis hole that described limit subtracts housing, end ring is set, axis hole arranged outside at least two resilient key assemblies of housing are subtracted on described limit, described resilient key assembly comprises key seat and bearing pin, described bearing pin is connected with described key seat by spring, and described bearing pin is pressed on the end face of described end ring.

2. axial retreating prevention mechanism according to claim 1, is characterized in that: described bearing pin subtracts the axis hole of housing diameter line along described limit is arranged.

3. axial retreating prevention mechanism according to claim 2, it is characterized in that: the axis hole that described limit subtracts housing is provided with internal thread, the outer surface of described end ring is provided with outside thread, and the axis hole that described end ring subtracts housing with described limit is threaded.

4. axial retreating prevention mechanism according to claim 3, is characterized in that: the end face of described end ring is provided with multiple groove, and described groove is corresponding with described bearing pin to be arranged.

5. axial retreating prevention mechanism according to claim 3, is characterized in that: the end face of described end ring is provided with ring gear.

6. axial retreating prevention mechanism according to claim 5, is characterized in that: described at least two resilient key assemblies are circumferentially equidistantly arranged.