CN202251324U

CN202251324U - Bolt for plastic part for automobile

Info

Publication number: CN202251324U
Application number: CN2011203881366U
Authority: CN
Inventors: 高叶绪; 彭军桥
Original assignee: Pan Asia Technical Automotive Center Co Ltd; Shanghai General Motors Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2011-10-13
Filing date: 2011-10-13
Publication date: 2012-05-30
Anticipated expiration: 2021-10-13

Abstract

The utility model relates to a bolt for a plastic part for an automobile. A sealing ring which is cast with the bolt is arranged on the inner side of the head of the bolt. By the bolt, a sealing gasket in the prior art can be eliminated, so that the problems that the cost is increased due to the use of the sealing gasket and the sealing gasket can be damaged easily and cannot be repeatedly used are effectively solved.

Description

A kind of bolt of automotive plastic part

Technical field

The utility model relates to a kind of bolt of automotive plastic part.

Background technique

It is a comparatively general problem for a long time that automobile leaks, and analyzes to seepy question, finds that major part is after plastic part is installed and exists the gap to cause between the fastening piece.

In order to solve the seepy question after plastic part is installed, existing technology is employed in the way of placing sealing gasket between plastic part and the bolt head more increases sealing effect.As shown in Figure 1, plastic part 10 is connected through sealing gasket 30 with bolt 40 heads 41.But be to use sealing gasket can bring cost of parts to rise, and breakage often appears after the sealing gasket dismounting and can't reusable problem.

The model utility content

The utility model designs a kind of bolt of automotive plastic part; Purpose is to solve to be utilized in the existing technology to place sealing gasket between bolt head and the plastic part and increase sealing effect, thus cause cost to rise and said sealing gasket breakage after can not reusable problem.

In order to achieve the above object, the utility model provides a kind of bolt of automotive plastic part, and this bolt comprises head and afterbody, and the side that said bolt head links to each other with afterbody has and this bolt seal ring cast in block; Wherein, said head and afterbody all are cylindric and cast solid.

As preferred embodiment, said afterbody comprises the front end that is connected with head and away from the rear end of head, the diameter of said afterbody diminishes through chamfering to the rear end from the end of said front end gradually.

As preferred embodiment, the side that said head does not link to each other with afterbody has groove, and the width of this groove is not more than the diameter of the front end of said afterbody, and the degree of depth is less than the thickness of said head.

As preferred embodiment, each edge of said bolt is the chamfering form.

As preferred embodiment, the height of said seal ring is 1/10 of a said plastic part thickness.

As preferred embodiment, the width of said seal ring is 3 times of its height.

As preferred embodiment, the height of said seal ring is 0.1-1.5mm.

Can find out from technique scheme; The bolt of the utility model belongs to the selfsealings bolt; Have seal ring at its head, saved the sealing gasket of between bolt head and plastic part, placing in the existing technology, and said seal ring and bolt cast solid; Be metal material, cracky can not reused.Therefore, use sealing gasket to compare the cost that has reduced part in the bolt of the utility model and the existing technology, having avoided simultaneously can not reusable problem after the said sealing gasket breakage.

Description of drawings

Fig. 1 is the bolted sectional drawing that plastic part passes through sealing gasket and existing technology;

Fig. 2 is the stereogram of the bolt of the utility model;

Fig. 3 is the bolted sectional drawing of plastic part and the utility model;

Fig. 4 is an enlarged view of irising out part among Fig. 3.

Embodiment

Following with reference to accompanying drawing, the specific embodiment that develops simultaneously is elaborated to the bolt of the automotive plastic part of the utility model.

The embodiment's of the utility model shown in Fig. 2 bolt comprises cylindric head 21 cast in block and afterbody 22; Wherein the side that links to each other with afterbody 22 of head 21 is cast with seal ring 212.

Referring to Fig. 2 and 3, can find out that afterbody 22 comprises the front end 221 that is connected with head 21 and away from the rear end 222 of head 21, the diameter of afterbody 22 222 diminishes through chamfering 223 from the end of front end 221 to the rear end gradually.

The side that head 21 does not link to each other with afterbody 22 has groove 211, and the width of this groove 211 is not more than the diameter of the front end 221 of afterbody 22, and the degree of depth is less than the thickness of head 21.

Preferably, each edge of bolt 2 is the chamfering form, is used for alleviating the breakage that is prone to generation when part connects.

Wherein, the diameter of seal ring 212 less than the diameter of head 21 greater than the diameter of the front end 221 of afterbody 22.The thickness t of its height h basis plastic part 1 matching used with it confirms that their proportionate relationship is preferably h=t/10, and the relation of the width w of seal ring 212 and height h is preferably w=3h.For common plastic part 1, the height of seal ring 212 is got 0.1-1.5mm.

In order to guarantee that excellent sealing performance can not damage plastic part by pressure again, be preferably 1000-2000MPa with the Young's modulus of bolt 2 matching used plastic part 1 materials.

During work, seal ring 212 pressurizeds of bolt 2 are embedded into the inside of plastic part 1, form the waterproof barrier of sealing, can effectively prevent the generation of seepy question.Therefore, use sealing gasket to compare the cost that has reduced part in the bolt of the utility model and the existing technology, having avoided simultaneously can not reusable problem after the said sealing gasket breakage.

Claims

1. the bolt of an automotive plastic part, this bolt comprises head and afterbody, it is characterized in that, the side that said bolt head links to each other with afterbody has and this bolt seal ring cast in block;

Wherein, said head and afterbody all are cylindric and cast solid; The diameter of said seal ring less than the diameter of head greater than the maximum diameter of afterbody.

2. bolt according to claim 1 is characterized in that, said afterbody comprises the front end that is connected with head and away from the rear end of head, the diameter of said afterbody diminishes through chamfering to the rear end from the end of said front end gradually.

3. bolt according to claim 1 is characterized in that, the side that said head does not link to each other with afterbody has groove, and the width of this groove is not more than the diameter of the front end of said afterbody, and the degree of depth is less than the thickness of said head.

4. according to each described bolt among the claim 1-3, it is characterized in that each edge of said bolt is the chamfering form.

5. according to each described bolt among the claim 1-3, it is characterized in that the height of said seal ring is 1/10 of a said plastic part thickness.

6. according to each described bolt among the claim 1-3, it is characterized in that the width of said seal ring is 3 times of its height.

7. according to each described bolt among the claim 1-3, it is characterized in that the height of said seal ring is 0.1-1.5mm.