CN202612322U - Tightening screw - Google Patents
Tightening screw Download PDFInfo
- Publication number
- CN202612322U CN202612322U CN 201220262600 CN201220262600U CN202612322U CN 202612322 U CN202612322 U CN 202612322U CN 201220262600 CN201220262600 CN 201220262600 CN 201220262600 U CN201220262600 U CN 201220262600U CN 202612322 U CN202612322 U CN 202612322U
- Authority
- CN
- China
- Prior art keywords
- steel ball
- groove
- screw
- circular steel
- round steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a tightening screw. The tightening screw comprises a screw and is characterized in that the front end of the screw is provided with a groove; a round steel ball is embedded in the groove; part of the round steel ball is exposed out of the groove; the groove is shaped like an inverted cone; the taper angle formed after the cone-shaped edge of the groove extends upwards is 2 to 30 degrees; the bottom of the groove is shaped like an inverted triangle; the vertex angle of the inverted triangle is 150 to 178 degrees; the embedded volume of the round steel ball in the groove is two-thirds to three-quarter of the volume of the round steel ball; the strength of the round steel ball is larger than that of the screw; and the diameter of the round steel ball is 50 to 60 percent of that of the screw. The tightening screw has the advantages the contact points between the steel ball and the bearing part are reduced due to the roundness and smooth finish of the steel ball so as to prevent the bearing from being damaged due to dents in the bearing part when the tightening screw is used for a long time, so that the service life of the bearing is prolonged, and the tightening screw can be applied to the field of fastening combined with the shaft sleeve.
Description
Technical field
A kind of fastening screw trip bolt of the utility model.
Background technique
Screw is the one type of fastening piece that is made up of nut and screw rod two-part, can be divided three classes by purposes: machine screw, fastening screw trip bolt and specific use screw, wherein fastening screw trip bolt is mainly used in the relative position between fixing two parts.The bearing that uses in the common mechanical work at present is outside equipped with axle sleeve; This axle sleeve does not stop rotation through immovable point around bearing, and screw need reach fastening effect in this process, can not damage bearing part when requiring to use again; And existing fastening screw trip bolt is generally steel; Have certain rigidity, can on bearing part, stay indenture after long-time the use, damage bearing.
Summary of the invention
The utility model technical problem to be solved provides and a kind ofly can reach fastening effect, can avoid the fastening screw trip bolt of bearing infringement again.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of fastening screw trip bolt, comprise screw rod, and described screw front end is provided with groove, and inlay card has circular steel ball in the described groove, and described circular steel ball partly is exposed to described groove.
Described groove is an inverted cone, and the angle of taper that the taper outer of described groove extends upward back formation is 2-30 °.
The bottom of described groove is a del, and the drift angle of described del is 150-178 °.
The volume that described circular steel ball embeds in the described groove is the 2/3-3/4 of the volume of described circular steel ball.
The intensity of described circular steel ball is greater than the intensity of described screw rod.
The diameter of described circular steel ball is the 50-60% of the diameter of described screw rod.
Compared with prior art, the advantage of the utility model is: a kind of fastening screw trip bolt of the utility model comprises screw rod; Screw front end is provided with groove, and inlay card has circular steel ball in the groove, and circular steel ball partly is exposed to described groove; When axle sleeve through immovable point when bearing does not stop rotating, the cylindrical of circular steel ball partly contacts with bearing part, utilizes the circularity and the degree of finish of steel ball; The point of contact of steel ball and bearing part is reduced; Avoid the long-time back of using on bearing part, to stay indenture damage bearing, prolonged the working life of bearing, can be applicable to the fastening effect field that axle sleeve combines.
Further because groove is an inverted cone, the angle of taper that the taper outer of groove extends upward back formation is 2-30 °, can make circular steel ball receive the effect of slot opening two ends chucking power, be difficult for from groove, skidding off, thereby better inlay card is in groove.
Further because the bottom of groove is a del, and the drift angle of del is 150-178 °, can make to form four between circular steel ball and the groove inwall and contact the further interlock in point of contact, can realize better clamp cooperation between the two thereby make.
Further, can better avoid circular steel ball in groove, to skid off because the volume that circular steel ball embeds in the groove is the 2/3-3/4 of the volume of circular steel ball.
Further because the intensity of circular steel ball, can increase the slot opening two ends greater than the intensity of screw rod to the chucking power of circular steel ball and more full of elasticity, the installation that helps steel ball is got with unloading.
Description of drawings
Fig. 1 is the structural representation of the utility model fastening screw trip bolt.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Specific embodiment
A kind of fastening screw trip bolt of the utility model, as shown in Figure 1, comprise screw rod 1, screw rod 1 front end is provided with groove 2, and inlay card has circular steel ball 3 in the groove 2, and circular steel ball 3 parts are exposed to groove 2.
In this specific embodiment, groove 2 is an inverted cone, and the angle of taper that the taper outer 4 of groove 2 extends upward back formation is 2-30 °; The bottom of groove 2 is a del, and the drift angle of del is 150-178 °; The volume that circular steel ball 3 embeds in the groove 2 is the 2/3-3/4 of the volume of circular steel ball 3; The intensity of circular steel ball 3 is greater than the intensity of screw rod 1; The diameter of circular steel ball 3 is the 50-60% of the diameter of screw rod 1.
Just to the further explain of the utility model, the protection domain of the utility model is as the criterion with claims for the foregoing description and accompanying drawing.
Claims (6)
1. a fastening screw trip bolt comprises screw rod, it is characterized in that: described screw front end is provided with groove, and inlay card has circular steel ball in the described groove, and described circular steel ball partly is exposed to described groove.
2. a kind of fastening screw trip bolt according to claim 1 is characterized in that: described groove is an inverted cone, and the angle of taper that the taper outer of described groove extends upward back formation is 2-30 °.
3. a kind of fastening screw trip bolt according to claim 2 is characterized in that: the bottom of described groove is a del, and the drift angle of described del is 150-178 °.
4. a kind of fastening screw trip bolt according to claim 1 is characterized in that: the volume that described circular steel ball embeds in the described groove is the 2/3-3/4 of the volume of described circular steel ball.
5. according to each described a kind of fastening screw trip bolt among the claim 1-4, it is characterized in that: the intensity of described circular steel ball is greater than the intensity of described screw rod.
6. according to each described a kind of fastening screw trip bolt among the claim 1-4, it is characterized in that: the diameter of described circular steel ball is the 50-60% of the diameter of described screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220262600 CN202612322U (en) | 2012-06-05 | 2012-06-05 | Tightening screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220262600 CN202612322U (en) | 2012-06-05 | 2012-06-05 | Tightening screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202612322U true CN202612322U (en) | 2012-12-19 |
Family
ID=47346024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220262600 Expired - Lifetime CN202612322U (en) | 2012-06-05 | 2012-06-05 | Tightening screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202612322U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720744A (en) * | 2012-06-05 | 2012-10-10 | 宁波市北仑华申紧固件有限公司 | Fastening screw |
-
2012
- 2012-06-05 CN CN 201220262600 patent/CN202612322U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720744A (en) * | 2012-06-05 | 2012-10-10 | 宁波市北仑华申紧固件有限公司 | Fastening screw |
| CN102720744B (en) * | 2012-06-05 | 2014-11-19 | 宁波市北仑华申紧固件有限公司 | Fastening screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180716 Address after: 315807 Baiyun Shan Road, Xiapu, Beilun, Ningbo, Zhejiang 78 Patentee after: Ningbo Hua Shen Yu Road Fastener Co., Ltd. Address before: 315807 No. 16 Puhe Road, Beilun Xiapu Piedmont Industrial Zone, Ningbo, Zhejiang Patentee before: Ningbo Beilun Huashen Set-screws Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |
|
| CX01 | Expiry of patent term |