CN201890730U - Pin - Google Patents

Abstract

The utility model discloses a pin, which is used for crawler cranes and comprises a pin body and a positioning section arranged at one end of the pin body. The positioning section is provided with at least two stages, the bevel opening angle of a primary positioning section closer to the pin body is smaller than that of a secondary positioning section farer away from the pin body. The utility model further provides a pin, which is used for crawler cranes and comprises a pin body and a positioning section arranged at one end of the pin body. The outer surface of the positioning section along the axial section is parabolic, and the bevel opening angle of the positioning section is gradually enlarged from the end of the positioning section connected with the pin body to the tail end of positioning section. Operating strength can be reduced during mounting of the pin, and the operating efficiency is increased.

Description

A kind of bearing pin

Technical field

The utility model relates to a kind of bearing pin, particularly a kind of bearing pin that is used for crawler crane.

Background technology

Bearing pin is the fastener of a class standardization, is extensive use of in crawler crane.As shown in Figure 1, be the interspersed scheme drawing of bearing pin 1 in the crawler belt assembling.This bearing pin 1 comprises bearing pin main body 2 and is located at main body positioning section 3 one end, tapered that wherein tool one angle is the groove opening angle of α between the outside wall surface of the conical surface of this positioning section 3 and bearing pin main body 2.The bearing pin of prior art is in installation process, often be difficult to intert, its major cause is to intert in the process of bearing pin 1 accurately centering of two devices 4,5 of bearing pin 1 bonded assembly, and need install earlier 4 and install 5 and rectify a deviation, can produce a correction power in the correction process, 3 pairs of devices of positioning section, 5 squeese pressures that provide (as shown in Figure 1) of bearing pin 1 front end are provided this correction power.The squeese pressure that setting device 4 and device 5 are corrected centering is f, and externally applied forces is F on bearing pin 1, and then the relation of external force and squeese pressure is as follows:

F＝ftanα ①

Therefore α is more little, and the externally applied forces F of institute is just more little, and it is just easy more to operate.

In addition, another effect of positioning section 3 is a directional tagging, because the axis hole of two of bearing pin 1 bonded assemblys device 4,5 and misaligning, so the enough little bearing pin 1 that just can make of positioning section 3 point diameter d easier penetrates stream oriented device 4,5.So bearing pin 1 is if reach operating effect preferably, then according to following formula:

$L=\frac{D-\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HSA00000339148100011.png"\; state="\{\{state\}\}">d</figure-callout>}}{2\tan \mathrm{\&alpha;}}$ ②

Can determine that positioning section length L (as shown in Figure 2) must long enough.For example, if the groove opening angle α of original positioning section 3 is 15 °, if will save the power of half, then 1. need the opening angle of positioning section 3 approximately is reduced to 7.5 ° according to formula, the length L of then corresponding positioning section 3 will extend original 1 times.This has not only wasted material, and can reduce the range of use of bearing pin 1 because of the increase of length L.

Therefore, there is a pair of contradiction in existing pin shaft structure, and promptly groove opening angle α is too big, and then the squeese pressure f that produces when applying identical external force F is too little, increases the bearing pin installation strength; α is too little as the groove opening angle, and then the positioning section length L is long, has reduced the range of use of bearing pin again.

The utility model content

For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of bearing pin that is used for crawler crane, and it can effectively reduce the working strength that bearing pin installs and increase work efficiency under the situation that does not increase length.

For achieving the above object, the utility model provides a kind of bearing pin, be used for crawler crane, comprise bearing pin main body and the positioning section that is positioned at this bearing pin main body one end, this positioning section has two-stage at least, and the groove opening angle of a positioning section nearer apart from this bearing pin main body is less than the groove opening angle of a positioning section far away apart from this bearing pin main body.

Further, described positioning section comprises one first positioning section and one second positioning section, and wherein this second positioning section is between this bearing pin main body and this first positioning section, and the groove opening angle of this second positioning section is less than the groove opening angle of this first positioning section.

Further, this second positioning section groove opening angle is 6 °～9 °.

Further, this first positioning section groove opening angle is 15 °.

Further, the outside face of junction is the arc transition face between this bearing pin main body and this second positioning section.

Further, the outside face of junction is the arc transition face between this second positioning section and this first positioning section.

Further, this first positioning section end is provided with fillet.

The purpose of this utility model also is to provide a kind of bearing pin, be used for crawler crane, comprise bearing pin main body and the positioning section that is positioned at this bearing pin main body one end, the outer surface in the cross section vertically of this positioning section is parabola shaped, and the groove opening angle of this positioning section increases gradually from its end to end of this positioning section that links to each other with this bearing pin main body.

Further, the outside face of junction is the arc transition face between this bearing pin main body and this positioning section.

Further, the end of this positioning section is provided with fillet.

Technique effect of the present utility model is: do not need to increase the length of bearing pin, can effectively reduce the working strength that bearing pin is installed, and improve its work efficiency; Further can also suitably shorten the length of bearing pin positioning section, reduce waste of material, reduce the restriction of space requirement bearing pin.

Description of drawings

Fig. 1 is the interspersed scheme drawing of bearing pin in the prior art;

Fig. 2 is a pin shaft structure scheme drawing in the prior art;

Fig. 3 is the embodiment scheme drawing of the utility model bearing pin;

Fig. 4 is another embodiment scheme drawing of the utility model bearing pin.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.

As shown in Figure 3, bearing pin 10 comprises bearing pin main body 20 and positioning section 30, and wherein positioning section 30 is positioned at an end of bearing pin main body 20, have first positioning section 31 and second positioning section 32, and second positioning section 32 is between first positioning section 31 and bearing pin main body 20.First positioning section mainly play the guiding role, and second positioning section mainly plays squeezing action.Therefore, but the groove opening angle γ of first positioning section 31 is the opening angle of common bearing pin, is generally about 15 °, and the easy like this bearing pin 10 that makes passes device to be connected.And the groove opening angle β of second positioning section 32 so that just can produce bigger squeese pressure with less external force, makes two devices of bearing pin bonded assembly centering less than the groove opening angle γ of first positioning section 31.Preferably, the groove opening angle β of second positioning section 32 is 6 °～9 °, still, is not limited to this angular range, concrete angle beta can be according to actual needs or level of processing calculate and determine.

In addition, the first positioning section end is provided with fillet 41, makes that do something in disregard of obstacles between bearing pin 10 and the device to be connected when relating to can smooth transition, even can simultaneously the length of positioning section 30 suitably be done weak point, reduce the waste of material, also can reduce the use restriction of space requirement bearing pin.In addition, the outside face of junction is an arc transition face 42 between first positioning section 31 and second positioning section 32, and it makes bearing pin main body 20 energy smooth transition when first and second positioning section conversion, reduces to impact.And the outside face of junction is an arc transition face 43 between second positioning section 32 and the bearing pin main body 20, and it makes bearing pin 10 in installation process, when second positioning section 32 forwards bearing pin main body 20 to, can smooth transition, and reduce to impact.

As shown in Figure 4, the positioning section 30a of the bearing pin 10a outer surface in cross section vertically is parabola shaped, and the groove opening angle of positioning section 30a increases gradually along with the increase of distance bearing pin main body 20a.So both the positioning section squeese pressure can be increased, the smooth transition of bearing pin 10a installation process can be realized again.In addition, the end of this positioning section 30a is provided with fillet 41a, makes that do something in disregard of obstacles between bearing pin 10a and the device to be connected when relating to can smooth transition, even can simultaneously the length of positioning section 30a suitably be done weak point, reduce the waste of material, also can reduce the use restriction of space requirement bearing pin.The outside face of junction is arc transition face 43a between positioning section 30a and bearing pin main body 20a, and it makes bearing pin 10a in installation process, when second positioning section 32 forwards bearing pin main body 20 to, can smooth transition, and reduce to impact.

Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.

Claims (10)

1. bearing pin, comprise bearing pin main body and the positioning section that is positioned at this bearing pin main body one end, it is characterized in that this positioning section has two-stage at least, the groove opening angle of a positioning section nearer apart from this bearing pin main body is less than the groove opening angle of a positioning section far away apart from this bearing pin main body.

2. bearing pin according to claim 1, it is characterized in that, described positioning section comprises one first positioning section and one second positioning section, this second positioning section is between this bearing pin main body and this first positioning section, and the groove opening angle of this second positioning section is less than the groove opening angle of this first positioning section.

3. bearing pin according to claim 2 is characterized in that, the groove opening angle of this second positioning section is 6 °～9 °.

4. bearing pin according to claim 2 is characterized in that, the groove opening angle of this first positioning section is 15 °.

5. according to each described bearing pin of claim 2 to 4, it is characterized in that the outside face of junction is the arc transition face between this bearing pin main body and this second positioning section.

6. according to each described bearing pin of claim 2 to 4, it is characterized in that the outside face of junction is the arc transition face between this second positioning section and this first positioning section.

7. according to each described bearing pin of claim 2 to 4, it is characterized in that this first positioning section end is provided with fillet.

8. bearing pin, comprise bearing pin main body and the positioning section that is positioned at this bearing pin main body one end, it is characterized in that the outer surface in the cross section vertically of this positioning section is parabola shaped, and the groove opening angle of this positioning section increases gradually from its end to this positioning section end that links to each other with this bearing pin main body.

9. bearing pin according to claim 8 is characterized in that, the outside face of junction is the arc transition face between this bearing pin main body and this positioning section.

10. bearing pin according to claim 8 is characterized in that, this positioning section end is provided with fillet.

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