CN203570819U

CN203570819U - Bolt and nut assembly and shaft sleeve capable of preventing torque of bolt from being reduced

Info

Publication number: CN203570819U
Application number: CN201320582117.6U
Authority: CN
Inventors: 冯静; 付翠强
Original assignee: Beijing Automotive Research Institute Co Ltd
Current assignee: BAIC Group ORV Co ltd
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2014-04-30
Anticipated expiration: 2023-09-18

Abstract

The utility model provides a bolt and nut assembly and a shaft sleeve capable of preventing the torque of a bolt from being reduced. The bolt and nut assembly comprises the bolt, a nut and the shaft sleeve, wherein the bolt and the nut are mutually matched, and the shaft sleeve is made of hard material and located between the head of the bolt and the nut. The shaft sleeve comprises a large step and a small step, wherein the large step is annular, the bolt is sleeved with the large step, the small step is annular and arranged on the side, towards the nut, of the large step, the bolt is sleeve with the small step, and the external diameter of the small step is smaller than the external diameter of the large step. According to the scheme, a plastic part of a vehicle can be separated from a metal fastener through the shaft sleeve capable of preventing the torque of the bolt from being reduced, the plastic part is prevented from releasing stress, and the torque of the bolt is prevented from being reduced.

Description

Bolt and nut component and prevent bolt torque decline axle sleeve

Technical field

The utility model relates to field of automobile, particularly a kind of bolt and nut component and prevent bolt torque decline axle sleeve.

Background technique

The mode that is fixedly connected with that bolt and nut is supporting is the mode of connection component conventional on automobile.After bolt or nut moment of torsion is according to the rules fastening, because the reason such as pretightening force deficiency or circumferential load be excessive, after will causing a period of time, torque value declines to a great extent, when bolt strained, cause bolt abruption or draw button, the supporting Placement of bolt and nut being produced and lost efficacy.

For example, in automobile production field, if there is working of plastics between bolt and nut, very easily produce the problem that fastener torque declines.Because, if there is working of plastics between bolt and nut, working of plastics is compressed when bolt tightening, produce plastic deformation, produce stress, stress, when discharging, applies excessive circumferential load to bolt, cause moment of torsion to decline, and the problem that fastener torque declines is to perplex automobile engineer's significant problem always.

Model utility content

The technical problems to be solved in the utility model is to provide a kind of bolt and nut component and prevents the axle sleeve that bolt torque declines, the problem easily declining to a great extent to solve bolt torque.

For solving the problems of the technologies described above, the utility model provides a kind of bolt and nut component, and its technological scheme is:

A kind of bolt and nut component, comprises the screw bolt and nut cooperatively interacting, and wherein, also comprises: axle sleeve, and material is hard material, between the head and nut of described bolt, described axle sleeve comprises: large step, ringwise, is sheathed on described bolt; Small stair, ringwise, is located at the side of described large step towards described nut, and is sheathed on described bolt; The external diameter of described small stair is less than the external diameter of described large step.

Wherein, described large step and described small stair are one-body molded.

Wherein, all ringwise sheet structures of described large step and described small stair.

Wherein, the internal diameter of described large step and described small stair is identical.

Wherein, the material of described axle sleeve is metallic material.

For solving the problems of the technologies described above, the utility model also provides a kind of axle sleeve that prevents that bolt torque from declining, and its technological scheme is:

Prevent the axle sleeve that bolt torque declines, wherein, material is hard material, comprising: large step, ringwise, is sheathed on described bolt; Small stair, ringwise, is located at the side of described large step towards described nut, and is sheathed on described bolt; The external diameter of described small stair is less than the external diameter of described large step.

Wherein, described large step and described small stair are one-body molded.

Wherein, material is metallic material.

The beneficial effect of technique scheme of the present utility model is as follows:

In such scheme, prevent that the axle sleeve of bolt torque decline from can separate the working of plastics of automobile and metal fastenings by step, avoid working of plastics to discharge stress and bolt torque decline.

Accompanying drawing explanation

Fig. 1 is the axle sleeve embodiment's (being designated hereinafter simply as axle sleeve embodiment) who prevents bolt torque decline of the present utility model structural representation;

Fig. 2 is the fastening front structural representation of bolt and nut component embodiment of the present utility model;

Fig. 3 is the structural representation of bolt and nut component embodiment of the present utility model after fastening;

Fig. 4 is that bolt and nut component embodiment of the present utility model installs the sectional drawing that rear each component coordinate.

Primary component symbol description:

1, axle sleeve

2, large step

3, small stair

4, bolt

5, nut

6, working of plastics

7, sheet metal part

8, packing ring

Embodiment

For making the technical problems to be solved in the utility model, technological scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.

Easily there is moment of torsion for existing bolt and nut component and decline in the utility model, the problem that moment of torsion declines especially more easily occurs when connecting the sheet metal part of automobile component and working of plastics, a kind of bolt and nut component is provided and prevents the axle sleeve that bolt torque declines.

As shown in Figure 2, Figure 3 and Figure 4, bolt and nut component of the present utility model comprises the axle sleeve 1 that prevents that bolt 4 moments of torsion from declining of the present utility model shown in the bolt 4 that cooperatively interacts and nut 5, Fig. 1.

Wherein, the material of axle sleeve 1 is hard material, and hardness is at least greater than working of plastics 6, is preferably metallic material.When application, axle sleeve 1 is between the head and nut 5 of bolt 4.Particularly, axle sleeve 1 comprises large step 2 and small stair 3, and as shown in Fig. 2-Fig. 4, large step 2 ringwise, is sheathed in the bar portion of bolt 4.Ringwise, it is located at the side of large step 2 towards nut 5 to small stair 3, and similarly, small stair 3 is also sheathed in the bar portion of bolt 4.And the external diameter of small stair 3 is less than the external diameter of large step 2, whereby, the two forms ledge structure.When connecting sheet metal part 7 and working of plastics 6, the bar portion of bolt 4 is successively through in sheet metal part 7, large step 2, small stair 3, working of plastics 6 and nut 5, and meanwhile, small stair 3 inserts in the hole of working of plastics 6, and large 2, step is folded between sheet metal part 7 and working of plastics 6.

Preferably, as Fig. 1, large step 2 and small stair 3 are one-body molded; Large step 2 and all ringwise sheet structures of small stair 3; Large step 2 is identical with the internal diameter of small stair 3.

As Fig. 2, before fastening working of plastics 6 and sheet metal part 7, small stair 3 is packed into the perforate of working of plastics 6, the outer side surface height of small stair 3 is a little less than the outer side surface under working of plastics 6 free states.Large step 2 one sides are affixed on working of plastics 6 inner side surfaces, and another side is affixed on sheet metal part 7, and sheet metal part 7 another sides are affixed on the bolt head of bolt 4.Due to locational requirement, can between the bolt head of bolt 4 and sheet metal part 7, add packing ring 8; In order to prevent that in transportation process, component come off, can add paper spacer/Steel Washer in axle sleeve 1 outside.

As Fig. 3, after fastening, working of plastics 6 is compressed, the height of its outer side surface is just concordant with the height of small stair 3 outer side surfaces (while designing the different size of axle sleeve 1, the height of the large small stair of axle sleeve should be according to periphery and working of plastics material behavior appropriate design, especially the height that should be taken into account small stair 3 need to be according to working of plastics 6 decrement appropriate design, to guarantee that axle sleeve 1 normally plays a role), guarantee that working of plastics 6 does not contact with nut 5.Whereby, after bolt 4 is fastening, bolt 4, nut 5 all do not contact with working of plastics 6, the tangential force that not produced by plastic deformation stress relief, the basic problem that solves the fastener torque decline causing due to working of plastics 6.

To sum up, the axle sleeve that bolt torque declines that prevents that the utility model provides is separated working of plastics and metal fastenings by ledge structure, can avoid working of plastics to discharge bolt torque in the bolt and nut component that causes of stress and decline, thereby can guarantee the stable of connection part.

The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. a bolt and nut component, comprises the screw bolt and nut cooperatively interacting, and it is characterized in that, also comprises: axle sleeve, and material is hard material, between the head and nut of described bolt, described axle sleeve comprises:

Large step, ringwise, is sheathed on described bolt;

Small stair, ringwise, is located at the side of described large step towards described nut, and is sheathed on described bolt;

The external diameter of described small stair is less than the external diameter of described large step.

2. bolt and nut component according to claim 1, is characterized in that, described large step and described small stair are one-body molded.

3. bolt and nut component according to claim 1, is characterized in that, all ringwise sheet structures of described large step and described small stair.

4. bolt and nut component according to claim 1, is characterized in that, the internal diameter of described large step and described small stair is identical.

5. bolt and nut component according to claim 1, is characterized in that, the material of described axle sleeve is metallic material.

6. prevent the axle sleeve that bolt torque declines, it is characterized in that, material is hard material, comprising:

Large step, ringwise, is sheathed on described bolt;

Small stair, ringwise, is located at the side of described large step towards the nut coordinating with described bolt, and is sheathed on described bolt;

7. axle sleeve according to claim 6, is characterized in that, described large step and described small stair are one-body molded.

8. axle sleeve according to claim 6, is characterized in that, all ringwise sheet structures of described large step and described small stair.

9. axle sleeve according to claim 6, is characterized in that, the internal diameter of described large step and described small stair is identical.

10. axle sleeve according to claim 6, is characterized in that, described material is metallic material.