CN201137617Y

CN201137617Y - Railroad car connecting pin

Info

Publication number: CN201137617Y
Application number: CNU2008200004676U
Authority: CN
Inventors: 李华; 程伟
Original assignee: Qiqihar Railway Rolling Stock Co Ltd
Current assignee: CRRC Qiqihar Rolling Stock Co Ltd
Priority date: 2008-01-14
Filing date: 2008-01-14
Publication date: 2008-10-22
Anticipated expiration: 2018-01-14

Abstract

The utility model relates to a connecting pin for vehicles on railways, which comprises a bar body which is provided with a pin cap, the tail end of the bar body is provided with a first ring-shaped groove, the connecting pin further comprises a ring-shaped closer head component, the shape of a central cavity body of the ring-shaped closer head component adapts to the shape of the tail end of the bar body, and the inner cavity wall is provided with a second ring-shaped groove, an elastic lock ring is arranged in the second ring-shaped groove, and when in a free state, the elastic block ring is inarched between the first ring-shaped groove and the second ring-shaped groove. The elastic block ring of the connecting pin for vehicles on railways which is provided by the utility model is totally surrounded by the bar body and the closer head, which can not be touched by external world, therefore, the bar body and the closer head can not be separated after finishing assembling, the connecting pin effectively solves the problem that a connecting pin in the prior art is easily stolen.

Description

The railway vehicle connecting pin

Technical field

The utility model relates to the railway vehicle technical field, particularly relates to a kind of connecting pin that is used for railway vehicle.

Background technique

Connecting pin is a linkage structure common in railway vehicle, and especially connecting pin has obtained using widely in the braking system of railway vehicle.

Please refer to Fig. 1, Fig. 1 is the structural representation that a kind of typical railway vehicle is used connecting pin in the prior art.

In the prior art, the connecting pin that railway vehicle is particularly adopted in the braking system of railway freight-car generally includes round pin 11, and round pin 11 further comprises the body of rod 111 and pin cap 112.It is circular that the cross section of the body of rod 111 is generally, and pin cap 112 is fixedly connected on an end of the body of rod 111; Both can weld mutually, also can be the structures of one.The end of the body of rod 111 is provided with the pin-and-hole (not shown), wherein can plug-in mounting cotter pin 13.

The body of rod 111 of round pin 11 is run through parts to be connected, and the end for the treatment of the body of rod 111 stretches out after to be connected the bottom, cotter pin 13 is interspersed in the described pin-and-hole again, can finish fitting operation like this; For fear of the axial float of round pin 11, can between cotter pin 13 and to be connected bottom surface, packing ring 12 be set.

Because outside the connecting pin that railway vehicle adopted all was exposed to usually, with taking off round pin behind simple tools dismounting cotter pin and the packing ring, therefore, round pin was easily stolen; This can cause the regular maintenance cost of railway vehicle significantly to increase, what is more important, and the part even the repertoire of railway vehicle braking or other system may be lost, the traffic safety that this may the serious harm railway vehicle, even cause the accident.

Therefore, how to avoid the present technical issues that need to address of the stolen those skilled in the art of being of connecting pin in the railway vehicle.

The model utility content

The purpose of this utility model provides a kind of railway vehicle connecting pin with reliable anti-theft feature.

For solving the problems of the technologies described above, the utility model provides a kind of railway vehicle connecting pin, comprises the body of rod that is provided with the pin cap, and the end of the described body of rod is provided with first annular groove; Described connecting pin further comprises the annular seal head parts, and the shape of described annular seal head parts central cavity and the shape of described body of rod end adapt, and its internal chamber wall is provided with second annular groove; Be provided with circlip in described second annular groove, when being in free state, described circlip is connected between described first annular groove and second annular groove.

Preferably, the cross section of the described body of rod is a regular polygon.

Preferably, the cross section of the described body of rod is circular.

Preferably, the end of the described body of rod is provided with the guiding surface of convergent.

Preferably, the U type that is shaped as of described circlip.

Preferably, described circlip is a Steel Cable Baffle Ring.

Preferably, described circlip is shaped as ellipse.

Preferably, the described central cavity described body of rod one side closed dorsad.

Relative above-mentioned background technology, railway vehicle provided by the utility model under the prerequisite that realizes its fundamental function, has increased anti-theft feature with connecting pin; Because the described body of rod and described end socket are to be connected in one by the back-up ring that is arranged between the two, and described back-up ring is surrounded fully by the described body of rod and described end socket, the external world can't contact, therefore in a single day the described body of rod installs both with described end socket and promptly can't separate, and has effectively avoided in the prior art connecting pin stolen problem easily.

Therefore, railway vehicle provided by the utility model not only can prevent losing of vehicle component with connecting pin, avoids suffering property loss, and can guarantee the braking and other system is complete, realize its function reliably, guarantee traffic safety.

Description of drawings

Fig. 1 is the structural representation that a kind of typical railway vehicle is used connecting pin in the prior art;

Fig. 2 is the structural representation of a kind of embodiment of the body of rod provided by the utility model;

Fig. 3 is the cross-sectional schematic of a kind of embodiment of annular seal head parts provided by the utility model;

Fig. 4 is the front elevational schematic of annular seal head parts shown in Figure 3;

Fig. 5 is the structural representation of a kind of embodiment of circlip provided by the utility model;

Fig. 6 is in the structural representation of assembling condition for circlip provided by the utility model and end socket;

Fig. 7 is the front elevational schematic of circlip shown in Figure 6 and annular seal head parts;

Fig. 8 is the overall structure schematic representation of connecting pin provided by the utility model.

Embodiment

Core of the present utility model provides a kind of railway vehicle connecting pin with reliable anti-theft feature.

The personnel of technical field understand the utility model scheme better, and the utility model is described in further detail below in conjunction with drawings and embodiments.

Please refer to Fig. 2, Fig. 2 is the structural representation of a kind of embodiment of the body of rod provided by the utility model.

Railway vehicle provided by the present invention comprises round pin 2 with connecting pin in a kind of embodiment, and round pin 2 further comprises the body of rod 21.It is circular that the cross section of the body of rod 21 is generally, but can be other shape also, such as regular hexagon.

Pin cap 22 is fixedly connected on an end of the body of rod 21; Both can weld mutually, also can be the structures of one.When the body of rod 21 was plugged in the parts to be connected, pin cap 22 was stuck in outside parts one side surface to be connected.

The other end of the body of rod 21 is provided with first annular groove 23, also is the two ends that first annular groove 23 and pin cap 22 lay respectively at the body of rod 21.Should suitably choose the width and the degree of depth of first annular groove 23, hereinafter will further be described this.

Please refer to Fig. 3 and Fig. 4, Fig. 3 is the cross-sectional schematic of a kind of embodiment of annular seal head parts provided by the utility model; Fig. 4 is the front elevational schematic of annular seal head parts shown in Figure 3.

Railway vehicle provided by the present invention also comprises annular seal head parts 3 with connecting pin, has circular ring substantially.Annular seal head parts 3 have a central cavity 31, and its cross section is roughly ring.According to the difference of round pin 2 bodies of rod 21 shapes, central cavity 31 can correspondingly change.When the body of rod 21 cross sections be shaped as circle the time, the shape of central cavity 31 cross sections preferably also is circular; When the body of rod 21 cross sections be shaped as regular hexagon or other shape the time, the shape of central cavity 31 cross sections also preferably also is regular hexagon or other shape; In a word, both shapes should adapt.

The cross section of the body of rod 21 and central cavity 31 has all adopted circle in this embodiment, and obviously, this only is the illustrative explanation, and the cross section that can not be understood that both cannot be other shape.

The inwall of annular seal head parts 3 central cavity 31 is provided with second annular groove 32.Width as first annular groove, 23, the second annular grooves 32 also should be chosen rightly, and both are preferably identical.

Please refer to Fig. 5, Fig. 5 is the structural representation of a kind of embodiment of circlip provided by the utility model.

Railway vehicle provided by the present invention also comprises circlip 4 with connecting pin.The circlip 4 that this specific embodiment provided has the U-shaped structure, and it also can have other different shapes certainly.

Regardless of the concrete shape of circlip 4, it must meet following condition:

The first, circlip 4 should produce necessary elastic strain;

The second, circlip 4 should have enough mechanical strengths;

The 3rd, when being in free state, circlip 4 should always can be stuck in the annular space that is formed by first annular groove 23 and second annular groove 32, and and then stops the body of rod 21 and annular seal head parts to be separated.

Therefore, should appropriately choose the material of circlip 4, so that it satisfies above-mentioned first, second condition, such as, can select the Spring Steel Wire back-up ring for use.

Should appropriately relate to simultaneously the shape of circlip 4, make it satisfy above-mentioned the 3rd condition.

As shown in Figure 5, in a kind of embodiment, circlip 4 has the U-shaped structure.In order to satisfy above-mentioned the 3rd condition, the internal diameter of circlip 4 should be less than the external diameter of the body of rod 21 ends, so that the interior perimembranous of circlip 4 can be absorbed among first annular groove 23 when being in free state; Simultaneously, the external diameter of circlip 4 should be greater than the internal diameter of end socket parts 3 central cavity 31, so that the peripheral part of circlip 4 can stretch among second annular groove 32 when being in free state.

The maximum inner diameter of circlip 4 is preferably always less than the minimum outer diameter of the body of rod 21 ends; Like this, no matter how to rotate in the annular housing that is made of first annular groove 23 and second annular groove 32, circlip 4 can not break away from first annular groove 23.In like manner, the minimum outer diameter of circlip 4 is preferably always greater than the maximum inner diameter of central cavity 31; Like this, no matter how to rotate in the annular housing that is made of first annular groove 23 and second annular groove 32, circlip 4 can not break away from second annular groove 32.

Should be pointed out that circlip 4 also can adopt other shape.

Such as, circlip 4 can be set to ellipse, and make the maximum inner diameter of the external diameter of its long axis direction greater than central cavity 31, make the minimum outer diameter of the internal diameter of its short-axis direction simultaneously less than the body of rod 21 ends.Reason repeats no more with preceding identical herein.

Please refer to Fig. 6, Fig. 7 and Fig. 8, Fig. 6 is in the structural representation of assembling condition for circlip provided by the utility model and end socket; Fig. 7 is the front elevational schematic of circlip shown in Figure 6 and annular seal head parts; Fig. 8 is the overall structure schematic representation of connecting pin provided by the utility model.

Fig. 6 to Fig. 8 has showed the mode of action of connecting pin provided by the present invention respectively from different perspectives.

Round pin 2 interts behind the parts to be connected, the terminal plug-in mounting of its body of rod 21 need be gone in the central cavity 31 of annular seal head parts 3.This operation for convenience can be further be provided with guiding surface 24 at the end of the body of rod 21.

Guiding surface 24 is specially annular, and to the terminal convergent of the body of rod 21.Guiding surface 24 can be annular tapered plane, also can be the cambered surface of annular convergent.

For fear of the axial float of round pin 21, can between annular seal head parts 3 and to be connected bottom surface, packing ring be set.

In addition, in order further to avoid extraneous contact resilient back-up ring 4, and then further improve anti-theft effect, can be with the central cavity 31 of annular seal head parts 3 closure of openings of the body of rod 21 1 sides dorsad.

Such as, end cap 33 can be set, and be fixed and be connected in central cavity 31 opening of the body of rod 21 1 sides dorsad, both fixedly connected modes specifically can be welding, can certainly be other Placements.

End cap 33 can also be the structure of one with end socket parts 3, and promptly the central cavity 31 of annular seal head parts 3 is a blind hole.

More than a kind of railway vehicle provided by the utility model is described in detail with connecting pin.Used specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.

Claims

1, a kind of railway vehicle connecting pin comprises the body of rod that is provided with the pin cap, it is characterized in that, the end of the described body of rod is provided with first annular groove; Described connecting pin further comprises the annular seal head parts, and the shape of described annular seal head parts central cavity and the shape of described body of rod end adapt, and its internal chamber wall is provided with second annular groove; Be provided with circlip in described second annular groove, when being in free state, described circlip is connected between described first annular groove and second annular groove.

2, railway vehicle connecting pin as claimed in claim 1 is characterized in that, the cross section of the described body of rod is a regular polygon.

3, railway vehicle connecting pin as claimed in claim 1 is characterized in that, the cross section of the described body of rod is circular.

4, railway vehicle connecting pin as claimed in claim 3 is characterized in that, the end of the described body of rod is provided with the guiding surface of convergent.

5, railway vehicle connecting pin as claimed in claim 4 is characterized in that, the U type that is shaped as of described circlip.

6, railway vehicle connecting pin as claimed in claim 5 is characterized in that, described circlip is a Steel Cable Baffle Ring.

7, railway vehicle connecting pin as claimed in claim 4 is characterized in that, described elasticity retaining figure is shaped as ellipse.

As each described railway vehicle connecting pin of claim 1 to 7, it is characterized in that 8, described central cavity is the described body of rod one side closed dorsad.