CN201998143U

CN201998143U - Sleeve for protecting nut and bolt

Info

Publication number: CN201998143U
Application number: CN2010206867525U
Authority: CN
Inventors: 许锡纲; 林建良
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2011-10-05
Anticipated expiration: 2020-12-29

Abstract

The utility model relates to a sleeve for protecting a nut and a bolt. An expansion slot is formed at the bottom of an inner hole of the sleeve for protecting the nut and the bolt. After the sleeve is sleeved in the nut or the bolt, the slot hole of the expansion slot is larger than a protrusion part at the bottom of the nut or the bolt, so that when the sleeve is rotated, the protrusion part at the bottom of the nut or the bolt cannot be abraded; each hole edge of the inner hole of the sleeve is inclined outwards centrifugally from the center to the left and right ends of the hole edge to form an inclined part, so that a polygonal corner edge of the nut or the bolt corresponding to the inner hole forms an acute angle (of less than 15 degrees); therefore, when the sleeve is rotated, the inclined part of the inner hole of the sleeve is attached to the polygonal corner edge of the nut or the bolt to achieve surface-surface contact, and the nut or the bolt can be reliably rotated and protected.

Description

Be used to protect the sleeve of nut and bolt

Technical field

The utility model relates to a kind of sleeve that is used to protect nut and bolt.

Background technology

Existing sleeve endoporus bottom is the protuberance of buckle nut (or bolt) bottom directly, when turnbarrel, can may wear to the protuberance of nut bottom, easily causes abrasion, corrosion or damage.Known sleeve 1 for example is hexagonal nut or bolt 2 in order to the cover commentaries on classics as shown in Figure 7, leave the space between the endoporus limit 11 of its sleeve and nut or bolt 2, when tightening or oppositely relaxing nut, bolt, can sting into a sharp keen contact wire between the knuckle line L on 2 liang of adjacent angular limits of nut and the endoporus limit 11 of sleeve, owing to screw or when lax, the relatively rotating, rub of sleeve and nut or bolt, can make each corner angle edge wearing and tearing, cause the surface-treated layer of sleeve and nut, bolt can be destroyed or peel off, cause oxidation, corrosion etc.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of sleeve that is used to protect nut and bolt.

For reaching above-mentioned purpose; the utility model provides a kind of sleeve that is used to protect nut and bolt; describedly be used to protect the polygonal endoporus bottom of the sleeve of nut and bolt to be formed with an expansion groove, the expansion groove is snapped into the nut in the sleeve endoporus or the protuberance of bolt bottom greater than one.

As preferred version, the polygonal endoporus limit of the wherein said sleeve that is used to protect nut and bolt from its middle body not to its left and right two ends outside deflection eccentrically, respectively be a deflection portion, the deflection portion on each deflection portion and adjacent another endoporus limit intersects at angle of cut point, and the polygonal arm of angle of each deflection portion and pairing nut of sleeve endoporus or bolt forms an acute angle; When rotational sleeve, the deflection portion of sleeve endoporus fits in the polygonal arm of angle of nut or bolt and formation face contacts with face.

As preferred version, wherein said acute angle is below 15 degree.

As preferred version, the polygonal endoporus limit of the wherein said sleeve that is used to protect nut and bolt towards the polygonal arm of angle central authorities dimpling of corresponding nut or bolt be an arc protuberance, and outwards little sticking up forms a pair of arc deflection portion from the two ends of arc protuberance.

As preferred version, the central portion on wherein said endoporus limit is a central flat part.

As preferred version, the central portion on wherein said endoporus limit is a central intersection point.

The utility model provides another kind to be used to protect the sleeve of nut and bolt, the polygonal endoporus limit of the described sleeve that is used to protect nut and bolt from its middle body not to its left and right two ends outside deflection eccentrically, respectively be a deflection portion, the deflection portion on each deflection portion and adjacent another endoporus limit intersects at angle of cut point, and the polygonal arm of angle of each deflection portion and pairing nut of sleeve endoporus or bolt forms an acute angle; When rotational sleeve, the deflection portion of sleeve endoporus fits in the polygonal arm of angle of nut or bolt and formation face contacts with face.

The utility model provides is used to protect polygonal (as hexagon) the endoporus bottom of the sleeve of nut and bolt to form an expansion groove, after being inserted in nut or bolt, this expansion groove slotted eye is greater than the protuberance of nut or bolt bottom, so when turnbarrel, can not may wear to the protuberance of this nut or bolt bottom; Outside eccentrically deflection respectively is a deflection portion along these left and right two ends, limit, hole respectively in each limit, hole central authorities of this sleeve endoporus; make the polygonal arm of angle of nut corresponding or bolt form an acute angle (15 degree are following) with this endoporus; therefore when rotational sleeve; the deflection portion of sleeve endoporus fits in the polygonal arm of angle of this nut or bolt, thus rotating screw cap or bolt and protected reliably.

Description of drawings

Fig. 1 is that the utility model sleeve is in the vertical profile diagrammatic sketch that is inserted in a nut;

Fig. 2 is fit (the not rotating) schematic cross-sectional view of the utility model sleeve and nut or bolt;

Fig. 3 is the schematic diagram of Fig. 2 from clockwise direction (C) rotational sleeve;

Fig. 4 is the schematic diagram of Fig. 2 from counter clockwise direction (C1) rotational sleeve;

Fig. 5 is one of this novel desirable sterogram of modifying from Fig. 2;

Fig. 6 is two of this novel desirable sterogram of modifying from Fig. 2;

Fig. 7 is the schematic cross-sectional view of known sleeve and nut fit.

[primary clustering symbol description]

1...... sleeve; 2...... nut or bolt;

1a...... endoporus; 1b...... expansion groove;

11...... endoporus limit; 12...... central flat part;

13...... deflection portion; 10...... center;

11a...... angle of cut point; A...... acute angle;

21...... the polygonal arm of angle of nut or bolt; 22...... the protuberance of bottom;

12a...... central intersection point; 11r...... arc protuberance;

13r...... arc deflection portion; C...... clockwise direction;

C1...... counterclockwise; L...... knuckle line.

The specific embodiment

Below by specific embodiment technology contents of the present utility model is described, those of ordinary skill in the art can understand other advantage of the present utility model and effect easily by the content that this specification disclosed.

Consult Fig. 1; the utility model provides a kind of sleeve (abbreviation sleeve) that is used to protect nut and bolt; one expansion groove 1b is formed on the polygonal of one sleeve 1 (as hexagon) endoporus 1a bottom; after being inserted in nut or bolt 2; the slotted eye of expansion groove 1b is greater than the protuberance 22 of the polygonal arm of angle 21 bottoms that are snapped into nut in the sleeve endoporus or bolt 2; when rotational sleeve 1; can not may wear to the protuberance 22 of bottom; thereby can not cause the abrasion of nut or bolt bottom, cause wearing and tearing, corrosion or damage.

The expansion groove 1b of this sleeve endoporus bottom can be shown in Fig. 1 solid line cylindrical shape, or oblique (taper) form gradually as shown in phantom in FIG. for example gradually tiltedly is the gradually oblique angles of 30 degree～60 degree, and also can be modified to the groove of other shape towards the sleeve top.Shape or the angle of this novel not restriction expansion groove 1a.

The utility model the bore expansion groove, also provides following sleeve structure in above-mentioned sleeve, with further protection nut or bolt, book is described as described below, and cooperates the embodiment of Fig. 2～Fig. 6 to be illustrated.

Consult Fig. 2～Fig. 4, Fig. 2 is fit (the not rotating) schematic cross-sectional view of the utility model sleeve and nut or bolt; Fig. 3 is the schematic diagram of Fig. 2 from clockwise direction (C) rotational sleeve; Fig. 4 is the schematic diagram of Fig. 2 from counter clockwise direction (C1) rotational sleeve; As can be seen from the figure, the endoporus limit 11 of polygonal (as hexagon) endoporus that the utility model also can be a sleeve 1 from its central flat part 12 respectively to two ends (depart from center 10) eccentrically outside deflection, respectively be a deflection portion 13, deflection portion 13 and sleeve endoporus polygonal (as the hexagon) the arm of angle 21 interpolations ground (interpolatively) of corresponding nut or bolt 2 form an acute angle A.Acute angle A is below 15 degree, and for example between 0.25～15 degree, but the utility model does not limit the angle of this acute angle.The deflection portion 13 on sleeve one endoporus limit 11 and the deflection portion 13 on another adjacent endoporus limit intersect at an angle of cut point 11a.

As shown in Figure 5, each endoporus limit of sleeve 1 forms an arc protuberance (convex portion) 11r towards the polygonal arm of angle 21 central dimplings of pairing nut or bolt 2, arc protuberance 11r is respectively to its two ends, outwards little sticking up forms the arc deflection 13r of portion, therefore when rotational sleeve 1, fit the immediately polygonal arm of angle 21 of pairing nut or bolt 2 of the arc deflection 13r of portion, rotating reliably, and can slippage.

As shown in Figure 6, the central flat part 12 on the endoporus limit 11 of Fig. 2～Fig. 4 has been simplified or shortened to a central intersection point 12a, form each deflection portion 13 from central intersection point 12a to the outside deflection in 11 left and right two ends, endoporus limit, as mentioned above, constitute one of this novel desirable entity.

Because announcement of the present utility model, when jacket casing changeed a nut or bolt, promptly fitted in the 13 winks polygonal arm of angle 21 of nut or bolt of the deflection portion on sleeve endoporus limit was changeed by band, immediately in the lump to reach locking or lax operation.And be contacting of " face " between the polygonal arm of angle 21 of sleeve endoporus limit 11 and nut or bolt; but not the contact of " line "; so slippage that no abrasion is caused; can not cause friction, consume between sleeve or institute's socket nut or bolt yet; protect nut or bolt whereby first, second protection sleeve itself.But above-mentioned central flat part 12 or central intersection point 12a summary definition are " central portion ".

The above; it only is preferred embodiment of the present utility model; be not to be used to limit scope of patent protection of the present utility model; so those of ordinary skills in modification or the change the foregoing description carried out without prejudice to the utility model patent spirit, all should in like manner be contained within the scope of patent protection of the present utility model.

Claims

1. a sleeve that is used to protect nut and bolt is characterized in that, describedly is used to protect the polygonal endoporus bottom of the sleeve of nut and bolt to be formed with an expansion groove, and the slotted eye of expansion groove is greater than being snapped into the nut in the sleeve endoporus or the protuberance of bolt bottom; Wherein, polygonal endoporus limit from its middle body not to its left and right two ends outside deflection eccentrically, respectively be a deflection portion, the deflection portion on each deflection portion and adjacent another endoporus limit intersects at angle of cut point, and the polygonal arm of angle of each deflection portion and pairing nut of sleeve endoporus or bolt forms an acute angle; When rotational sleeve, the deflection portion of sleeve endoporus fits in the polygonal arm of angle of nut or bolt and formation face contacts with face.

2. be used to protect the sleeve of nut and bolt according to claim 1, it is characterized in that, described acute angle is below 15 degree.

3. be used to protect the sleeve of nut and bolt according to claim 1; it is characterized in that; the polygonal endoporus limit of the described sleeve that is used to protect nut and bolt towards the polygonal arm of angle central authorities dimpling of corresponding nut or bolt be an arc protuberance, and outwards little sticking up forms a pair of arc deflection portion from the two ends of arc protuberance.

4. be used to protect the sleeve of nut and bolt according to claim 1, it is characterized in that, the central portion on described endoporus limit is a central flat part.

5. be used to protect the sleeve of nut and bolt according to claim 1, it is characterized in that, the central portion on described endoporus limit is a central intersection point.