CN202946512U - Bolt component with anti-release structure and integral type cover cap adopting same - Google Patents

Abstract

A bolt assembly with an anti-off structure and an integral cover using the bolt assembly, the technical proposal of which includes: bolts and bushings, the bolts include a head and a screw part, and the head is a hexagonal head structure , and has a flange surface, the diameter of the flange surface is larger than the diameter of the inner hole of the shaft sleeve, the upper part of the screw part is a polished rod, and the lower end of the polished rod has a step, and the diameter of the step is slightly larger than the polished rod The lower part of the screw part is a threaded part; the bushing is I-shaped, with flanging at the upper end and the lower end respectively, the diameter of the inner hole of the bushing is larger than the outer diameter of the step, and the middle part of the bushing For the shrinking part. The beneficial effects of the utility model are: the above structure realizes the anti-off, no need to add extra parts, the structure is simple, easy to realize, and high in reliability.

Description

A bolt assembly with an anti-off structure and an integral cover using the bolt assembly

technical field

The utility model relates to a bolt assembly with an anti-off structure and a rocker cover using the bolt assembly. the

Background technique

The sealing and lubrication of the related parts of the engine valve mechanism, such as rocker arm, valve bridge, valve, spring seat, etc., play an important role in the long-lasting and good operation of the engine, so the upper part of the engine needs a rocker cover to seal with a certain pressure motor oil. For multi-cylinder machines, if one cover per cylinder is adopted, the sealing surface will undoubtedly be increased, thereby increasing the possibility of oil leakage. Therefore, the integral cover can greatly reduce the sealing surface to be sealed.

However, the overall cover has higher requirements on the precision and flatness of the contact surface. If a cover made of metal material is used, the precision of the contact surface can be met through processing, but the engine cover does not require high mechanical strength, and the metal material undoubtedly increases The cost and weight of the engine; at the same time, the noise and vibration generated by the engine valve mechanism are relatively large. If the direct contact between the cover and the body is used, in addition to the noise of the valve mechanism cannot be effectively cut off, the noise and vibration generated by the cover itself are also very large. Large, which greatly reduces the comfort of the engine and the whole machine, and cannot meet the noise requirements of the regulations; for the integral cover assembly made of plastic materials, it is generally composed of shells, gaskets, bolts, etc., because of its rigidity and stability Poor, before being assembled into the engine, it needs to be sub-packaged by the supplier and placed on a special inspection tool for airtightness inspection. If all parts are in a scattered state after passing the airtightness inspection, they need to be re-assembled on the assembly line. This increases the possibility of oil leaks and also increases assembly time.

Contents of the invention

The utility model aims at the deficiencies of the prior art, and provides a bolt assembly with an anti-off structure and an integral cover using the bolt assembly. The utility model is simple, reliable, and has an anti-off structure. The bolt assembly can be used for Integral cover.

The utility model is achieved through the following technical measures: a bolt assembly with an anti-off structure, including a bolt and a shaft sleeve, the bolt includes a head and a screw part, the head is a hexagonal head structure, and has a Flange surface, the diameter of the flange surface is greater than the diameter of the inner hole of the shaft sleeve, the upper part of the screw part is a polished rod, and the lower end of the polished rod has a step, and the diameter of the step is slightly larger than the diameter of the polished rod. The lower part of the screw part is a threaded part; the shaft sleeve is I-shaped, with flanging at the upper end and the lower end respectively; department. the

An integral cover using a bolt assembly with an anti-off structure, including a non-metallic shell, a sealing washer and a bolt assembly, after the necking part of the shaft sleeve of the bolt assembly is shrinked, the inner diameter of the necking part Smaller than the diameter of the step, it is installed in the mounting hole on the housing. The mounting hole is a stepped hole with a small upper part and a larger lower part. The diameter of the flange at the upper end of the sleeve is larger than the inner diameter of the mounting hole. A sealing ring is installed in the hole between the shaft sleeve and the housing, and the diameter of the flange at the lower end of the shaft sleeve is larger than the inner diameter of the upper hole of the sealing gasket.

The beneficial effects of the utility model are: the non-metallic casing is tested for sealing as a whole and assembled on the engine, which can greatly improve its sealing reliability and reduce unnecessary disassembly and assembly time, and can be widely used in The rocker cover of various engines; through the above structure, the anti-loosening is realized, no additional parts are needed, the structure is simple, easy to implement, and high in reliability.

Description of drawings

Fig. 1 is a structural schematic diagram of a bolt assembly in a specific embodiment of the present invention after shrinking.

Fig. 2 is a schematic structural view of the integral cover in the specific embodiment of the present invention.

In the figure: 1. Shell, 2. Sealing washer, 3. Bolt assembly, 4. Bolt, 4.1, Head, 4.2, Flange surface, 4.3, Step, 4.4, Threaded part, 5. Shaft sleeve, 5.1, Upper end Flanging, 5.2, lower end flanging, 5.3, inner hole, 5.4, necking part.

Detailed ways

In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation manner.

As shown in the accompanying drawings, a bolt assembly with an anti-off structure includes a bolt 4 and a bushing 5. The bolt 4 includes a head 4.1 and a screw part. The head 4.1 is a hexagonal head structure with a flange surface 4.2, the diameter of the flange surface 4.2 is larger than the diameter of the inner hole of the shaft sleeve 5, the upper part of the screw part is a polished rod, and the lower end of the polished rod has a step 4.3, and the diameter of the step 4.3 is slightly larger than that of the polished rod. diameter, the lower part of the screw part is the threaded part 4.4; the bushing 5 is I-shaped, with flanging at the upper end and the lower end respectively, the diameter of the inner hole of the bushing is larger than the outer diameter of the step, and the bushing 5 The middle part is the necking part 5.4. The utility model also has specific features that the outer diameter of the above-mentioned step 4.3 is the same as the outer diameter of the threaded part 4.4.

An integral cover using a bolt assembly with an anti-off structure, including a non-metallic shell 1, a sealing washer 2, and a bolt assembly 3, after the necking part 5.4 of the shaft sleeve 5 of the bolt assembly 3 is shrunk, Make the inner diameter of the necking part 5.4 smaller than the diameter of the step 4.3 and install it in the installation hole on the housing 1. The installation hole is a stepped hole with a small upper part and a larger lower part. greater than the inner diameter of the installation hole, the sealing gasket 2 is installed between the shaft sleeve 5 and the housing 1 in the step hole, and the diameter of the flange 5.2 at the lower end of the shaft sleeve is larger than the inner diameter of the upper hole of the sealing gasket 2 , can effectively prevent the sealing gasket from coming out downwards.

The undescribed technical features of the utility model can be realized by or using the prior art, so they will not be repeated here. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary skilled persons within the essential scope of the present utility model shall also belong to the protection scope of the present utility model.

Claims (2)

1. bolt assembly with disconnecting prevention structure, it is characterized in that, comprise bolt, axle sleeve, described bolt comprises head and screw portion, and described head is hexagon head structure, and with flanged surface, the diameter of described flanged surface is greater than the diameter of bore of axle sleeve, and the top of described screw portion is polished rod, and there is a step lower end of described polished rod, the diameter of described step is a bit larger tham the diameter of described polished rod, and the bottom of described screw portion is the screw thread position; Described axle sleeve is I-shaped, and there is respectively flange top and bottom, and described inner hole of shaft sleeve diameter is greater than the external diameter of described step, and the middle and upper part of described axle sleeve is choke.

2. integrated type cover cap that adopts bolt assembly claimed in claim 1, it is characterized in that, comprise non-metal shell, seal washer and bolt assembly, after the reducing position reducing of the axle sleeve of described bolt assembly, make in the mounting hole that is arranged on after the diameter of internal diameter less than described step at reducing position on described housing, described mounting hole is up-small and down-big step hole, the upper end flange diameter of described axle sleeve is greater than the internal diameter of mounting hole, between described axle sleeve and housing, seal washer is installed in described step hole, the diameter of described axle sleeve lower end flange is greater than the internal diameter in the upper hole of described seal washer.

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