CN202264187U - Screw driver with fixed torque - Google Patents
Screw driver with fixed torque Download PDFInfo
- Publication number
- CN202264187U CN202264187U CN2011203897171U CN201120389717U CN202264187U CN 202264187 U CN202264187 U CN 202264187U CN 2011203897171 U CN2011203897171 U CN 2011203897171U CN 201120389717 U CN201120389717 U CN 201120389717U CN 202264187 U CN202264187 U CN 202264187U
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- CN
- China
- Prior art keywords
- gear
- screw driver
- core bar
- fixed torque
- screwdriver
- 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 - Fee Related
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Abstract
A screw driver with a fixed torque is designed to solve the problems that at present, an ordinary screw driver with a fixed torque is complex in structure, high in cost, large in volume and not convenient enough to operate. The screw driver with the fixed torque comprises an operating handle with an inner cavity and a core bar with a screw driver head, and the core bar is provided with a gear A, a gear B and an elastic element which are arranged at one end of the inner cavity of the operating handle. The gear A rotates along with the operating handle and is in transmission connection with the core bar, the gear B is snapped with the gear A, and the elastic element abuts against the gear B. The elastic element abuts against the gear B to exert a thrust so as to overcome axial separating force generated between the gear A and the gear B when the gear A drives the core bar to rotate. The screw driver with the fixed torque has the advantages of being simple in structure, small in volume, convenient to operate and capable of achieving the aim of limiting the torque well. Besides, the screw driver with the fixed torque is particularly suitable for installation and dismantling of a standard screw, is convenient, quick and time-saving to operate, and can prolong service life of the standard screw.
Description
Technical field
The utility model relates to a kind of screwdriver, relates in particular to a kind of even twisting moment screwdriver.Be mainly used in the installing/dismounting of standard screws.
Background technology
At present, the internal structure of known even twisting moment screwdriver is of all kinds, can both realize limiting the effect of moment of torsion basically preferably.But its structure more complicated, cost is higher; Volume is big, and operation is convenient inadequately.
Summary of the invention
The utility model is in order to solve present known even twisting moment screwdriver structure more complicated, and cost is higher; Volume is big, and operation is not enough easily inadequately, and a kind of even twisting moment screwdriver is provided, and it comprises the operating grip that has inner chamber and have the core bar of separating cutter head that said core bar is provided with gear A, gear B and flexible member at an end of operating grip inner chamber; Wherein: gear A is rotated with operating grip, and is in transmission connection with core bar; The mutual interlock of said gear B and gear A, said flexible member is resisted against on the gear B.This flexible member top (supporting) with applied thrust, overcomes the axial separation force that between gear A and gear B, produces when gear A drives the core bar rotation in gear B.Wherein screwdriver even twisting moment size depends on the elastic performance parameter value of this flexible member.
The beneficial effect of the utility model: simple in structure, volume is little, and is easy to operate, can reach the purpose that limits moment of torsion preferably.And be specially adapted to the installing/dismounting of standard screws, simple operation, save time, and can improve standard screws service life.
Description of drawings
Fig. 1 the utility model structural representation
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
In the accompanying drawing 1 is operating grip, and 2 for to have the core bar of separating cutter head, and 3 is gear A, and 4 is gear B, and 5 is flexible member.
The specific embodiment
Referring to Fig. 1, the even twisting moment screwdriver, it comprises the operating grip 1 that has inner chamber and has the core bar 2 of separating cutter head that said core bar 2 is provided with gear A 3, gear B 4 and flexible member 5 at an end of operating grip 1 inner chamber; Wherein: gear A 3 is rotated with operating grip 1, and is in transmission connection with core bar 2; Said gear B 4 and gear A 3 mutual interlocks, said flexible member 5 is resisted against on the gear B 4.
The elastic performance parameter value of said flexible member 5 should be complementary with screwdriver even twisting moment size.
The utility model is to utilize the inner operating mechanism of operating grip to realize the screwdriver torque is limited.Gear A 3 is with operating grip 1 rotation; Gear A 3 and gear B 4 mutual interlocks; Flexible member 5 is resisted against on the gear B 4 with applied thrust; Overcome the axial separation force that between gear A 3 and gear B 4, produces when gear A 3 drives the core bar rotation,, reach the purpose that limits the screwdriver torque promptly through the elastic performance parameter value of flexible member; The even twisting moment of the required screwdriver of establishing criteria screw is big or small in other words, selects to have the flexible member 5 of corresponding elastic performance parameter value, reaches the purpose that limits the screwdriver torque.
Claims (2)
1. even twisting moment screwdriver, it comprises the operating grip (1) that has inner chamber and have the core bar (2) of separating cutter head, it is characterized in that: said core bar (2) is provided with gear A (3), gear B (4) and flexible member (5) at an end of operating grip (1) inner chamber; Wherein: gear A (3) is rotated with operating grip (1), and is in transmission connection with core bar (2); Said gear B (4) and gear A (3) interlock each other, said flexible member (5) is resisted against on the gear B (4).
2. even twisting moment screwdriver according to claim 1 is characterized in that: the elastic performance parameter value of said flexible member (5) should be complementary with screwdriver even twisting moment size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203897171U CN202264187U (en) | 2011-10-13 | 2011-10-13 | Screw driver with fixed torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203897171U CN202264187U (en) | 2011-10-13 | 2011-10-13 | Screw driver with fixed torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202264187U true CN202264187U (en) | 2012-06-06 |
Family
ID=46154997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203897171U Expired - Fee Related CN202264187U (en) | 2011-10-13 | 2011-10-13 | Screw driver with fixed torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202264187U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431000A (en) * | 2011-10-13 | 2012-05-02 | 沈阳航空航天大学 | Fixed torque screwdriver |
| CN114191776A (en) * | 2021-12-21 | 2022-03-18 | 李萌 | Midwifery activity device for medical obstetrical department near delivery |
-
2011
- 2011-10-13 CN CN2011203897171U patent/CN202264187U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431000A (en) * | 2011-10-13 | 2012-05-02 | 沈阳航空航天大学 | Fixed torque screwdriver |
| CN114191776A (en) * | 2021-12-21 | 2022-03-18 | 李萌 | Midwifery activity device for medical obstetrical department near delivery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20121013 |