CN217633374U

CN217633374U - Nut protection locking cap

Info

Publication number: CN217633374U
Application number: CN202221392953.3U
Authority: CN
Inventors: 王小毅; 张树东
Original assignee: Tianjin Railway Signal Co Ltd
Current assignee: Tianjin Railway Signal Co Ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-10-21
Anticipated expiration: 2032-05-26

Abstract

The utility model discloses a nut protection locking cap, including the protection body, its characterized in that: two stages of variable-diameter holes are arranged in the protection body and respectively comprise a first stage hole and a second stage hole, wherein the aperture of the first stage hole is larger than that of the second stage hole; a plurality of backstop teeth are arranged in the primary reducing hole along the axial direction of the primary reducing hole, and backstop grooves matched with the edges and corners of the nuts are formed between adjacent backstop teeth; and a through pin hole is arranged along the radial direction of the secondary hole. By adopting the technical scheme, on the basis of keeping the existing anti-loosening effect, the accumulation of sand grains and iron slag particles is reduced, the service life of the bolt assembly is prolonged, the maintenance workload of a railway turnout engineering maintenance department is greatly reduced, and the requirement of rapid development of railways in China is met.

Description

Nut protection locking cap

Technical Field

The utility model belongs to the technical field of the protection of fastener bolt subassembly, especially, relate to a nut protection locking cap.

Background

The bolt is widely used in the installation device of the railway turnout conversion equipment. The known bolt structure is: the bolt is sleeved with a washer and a spring washer, and the bolt is provided with a nut. In general, in order to be able to attach and detach the bolt, a certain gap is required between the bolt and the nut thread. However, under the conditions of frequent reciprocating action and vertical vibration of the mounting device, the gap between the bolt and the nut is gradually enlarged, so that the bolt and the nut are rotated reversely to be loosened, even the nut falls off, thereby scattering connected parts and causing serious consequences of railway accidents. The reciprocating action of the railway turnout is easy to enlarge the gap between the mounting bolt and the nut, and the railway turnout is more carefully inspected on site, so that the labor intensity and the maintenance amount of maintenance personnel are larger.

In order to solve the problem of loosening of bolts and nuts, the applicant applies for a combined anti-loosening bolt in the early stage, the publication number of which is (CN 201925311U), and the combined anti-loosening bolt is characterized in that: the anti-loosening bolt is characterized in that a washer and a spring washer are sleeved on the bolt, a nut is installed on the bolt, a cylindrical head is manufactured at the front end of the bolt, planes are symmetrically manufactured on two side faces of the cylindrical head, an anti-loosening cover with a matching hole is installed on the cylindrical head, a multi-angle inner hole matched with the shape of the nut is manufactured at the inner end of the anti-loosening cover, and a split pin for clamping the anti-loosening cover is installed on the cylindrical head. Therefore, the nut cannot rotate, the problem of looseness prevention of the bolt is solved, and other parts connected through the bolt can repeatedly move without clearance and looseness, and the bolt is safe and reliable.

The product discovers a problem for a long time that the nut is rusted and is not easy to disassemble due to the fact that more sand grains and iron slag are gathered in the anti-loosening cover and the bolt joint surface by means of wind power or rainwater and other particles; in addition, the upper portion of this prior art bolt exposes the upper end at the protective cover, and the upper end of discovery bolt has taken place to warp when actual overhaul, and then leads to the unable problem of dismantling of locking lid, at this moment can only break and tear open.

Therefore, the utility model discloses carry out the optimal design on guaranteeing that locking lid can play the basis of locking effect, solved the nut protection locking cap of prior art problem.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a rational in infrastructure, reduce sand grain, iron slag and borrow etc. particulate matter gathering, improve bolt assembly life, improve maintenance efficiency's nut protection locking cap.

The utility model discloses a realize like this, a nut protection locking cap, including the protection body, its characterized in that: two stages of variable diameter holes are arranged in the protection body and respectively comprise a first stage hole and a second stage hole, wherein the aperture of the first stage hole is larger than that of the second stage hole; a plurality of backstop teeth are arranged in the primary reducing hole along the axial direction of the primary reducing hole, and backstop grooves matched with the edges and corners of the nuts are formed between adjacent backstop teeth; and a through pin hole is arranged along the radial direction of the secondary hole.

Preferably, the outer diameter of the protection body is of an equal-diameter structure.

Preferably, the outer diameter of the protection body adopts a reducing structure matched with the two-stage reducing holes.

Preferably, the wall thickness of the secondary hole of the protection body is larger than that of the primary hole.

Preferably, the secondary holes are blind holes.

The utility model has the advantages and technological effect:

because the above technical scheme is adopted in the utility model, on keeping the basis of current locking effect, reduce particulate matter gathering such as sand grain, iron slag borrow, improve bolt assembly life, reduce railway switch engineering maintenance department's maintenance work load by a wide margin, adapt to the needs of the quick development of china's railway.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 isbase:Sub>A sectional view A-A of FIG. 1;

FIG. 3 is a view taken along direction K in FIG. 2;

FIG. 4 is a schematic view of the structure of example 2;

fig. 5 is a sectional view B-B in fig. 4.

In the figure, 1, a protection body; 1-1, primary pores; 1-2, secondary pores; 1-3, stopping tooth retreat; 1-4, pin holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1, please refer to fig. 1 to 3; a nut protection locking cap comprises a protection body 1, wherein in the embodiment, the outer diameter of the protection body is of an equal-diameter structure or a diameter-variable structure; two stages of reducing holes, namely a first stage hole 1-1 and a second stage hole 1-2, are arranged in the protection body, and the first stage hole is used for preventing looseness; the secondary hole is used for protecting the end head of the bolt, the cross section of the secondary hole is the same as the end head of the bolt, and the secondary hole is a flat and long hole; in this embodiment, the secondary holes are blind holes; wherein the aperture of the primary pore is larger than that of the secondary pore; in this embodiment, the outer diameter of the protection body adopts a reducing structure matched with the two-stage reducing holes; a plurality of backstop teeth 1-3 are arranged in the primary reducing hole along the axial direction of the primary hole, and a backstop groove matched with the edge angle of the nut is formed between every two adjacent backstop teeth; the stopping tooth plays a role in preventing the bolt assembly nut from loosening, through pin holes 1-4 are arranged in the radial direction of the secondary hole, and split pins on the bolt assembly are installed on the pin holes and used for limiting the axial direction of the stopping lock cap and preventing the bolt from being separated.

In the preferred embodiment, the wall thickness at the secondary hole of the protection body is greater than that at the primary hole, so that the bearing capacity is improved, the impact of foreign objects is resisted, and the protection of the bolt end is further realized.

In example 2, referring to fig. 4 and 5, the secondary pores in this example are open structures; the pinhole still has the function of drainage in this embodiment, when the top of second grade hole was open structure, the rainwater was along remaining, then discharges from pinhole department, and then reduces more rainwater and gets into in the locking cap.

To sum up, the utility model discloses on keeping the basis of current locking effect, rational in infrastructure, reduce the granule gathering such as sand grain, iron slag borrow, improve bolt assembly life, improve advantages such as maintenance efficiency.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principles of the present invention may be made of metal material or hard non-metal material; all should be included in the scope of protection of the present invention.

Claims

1. The utility model provides a nut protection locking cap, includes protection body, its characterized in that: two stages of variable diameter holes are arranged in the protection body and respectively comprise a first stage hole and a second stage hole, wherein the aperture of the first stage hole is larger than that of the second stage hole; a plurality of backstop teeth are arranged in the primary hole along the axial direction of the primary hole, and backstop grooves matched with edges and corners of the nuts are formed between adjacent backstop teeth; and a through pin hole is arranged along the radial direction of the secondary hole.

2. The nut guard locking cap of claim 1, wherein: the outer diameter of the protection body is of an equal-diameter structure.

3. The nut guard locking cap of claim 1, wherein: the outer diameter of the protection body adopts a reducing structure matched with the two-stage reducing holes.

4. The nut guard locking cap of claim 1, wherein: the wall thickness of the secondary hole of the protection body is larger than that of the primary hole.

5. The nut guard locking cap of claim 1, wherein: the secondary holes are blind holes.