CN203738679U - Labor-saving wrench - Google Patents
Labor-saving wrench Download PDFInfo
- Publication number
- CN203738679U CN203738679U CN201320816462.1U CN201320816462U CN203738679U CN 203738679 U CN203738679 U CN 203738679U CN 201320816462 U CN201320816462 U CN 201320816462U CN 203738679 U CN203738679 U CN 203738679U
- Authority
- CN
- China
- Prior art keywords
- gear
- sleeve
- generation part
- ripple generation
- flexbile gear
- 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
Links
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- Gears, Cams (AREA)
Abstract
The utility model relates to a labor-saving wrench which comprises a sleeve, a flexible gear, a rigid gear sleeve, a connecting rod and a handle, wherein a bolt matching hole is formed in the front end of the sleeve; a wave generation component is arranged at the rear end of the sleeve; the periphery of the wave generation component is not round; the flexible gear is arranged on the outer side of the wave generation component; a bearing ball is arranged between the flexible gear and the wave generation component; both the wave generation component and the flexible gear are arranged in the rigid gear sleeve; gear teeth are arranged on the outer ring of the flexible gear and the inner ring of the rigid gear sleeve; the flexible gear is meshed with part of the rigid gear sleeve; the connecting rod is arranged at the rear end of the rigid gear sleeve; the handle is arranged at the rear end of the connecting rod. According to the utility model, a harmonic gear structure is formed by the wave generation part, the flexible gear and the rigid gear sleeve, and a harmonic gear has greater transmission ratio, a tighter bolt or a tighter nut can be unscrew with smaller torque.
Description
Technical field
The utility model relates to a kind of spanner, particularly a kind ofly can by less power, back out the labour-saving spanner of tighter screw, belongs to spanner technical field.
Background technology
In the assembling and maintenance process of product, nut and screw usually there will be the situation that rust is dead and be difficult to turn on; To adopt the method for Lengthened wrench actuation arm to dismantle habitually in the past, but there is application of force difficulty in this method, and dynamics is inadequate, dangerous high drawback, and can cause thread damage, workpiece destroys, people's personal safety is on the hazard, has not only extended the working time, also increased job costs.
Utility model content
The utility model object is in order to overcome the deficiencies in the prior art, to provide a kind of can back out by less power the labour-saving spanner of tighter screw.
For achieving the above object, the technical solution adopted in the utility model is: a kind of labour-saving spanner, comprises sleeve, flexbile gear, firm wheel case, connecting rod and handle; The front end of described sleeve is provided with screw fit hole, and the rear end of sleeve is provided with ripple generation part; Being shaped as of the excircle of described ripple generation part is non-circular; Described flexbile gear is arranged on the outside of ripple generation part, between flexbile gear and ripple generation part, is provided with bearing ball; Described ripple generation part and flexbile gear are all arranged in firm wheel case; On the inner ring of the outer ring of described flexbile gear and just wheel case, be provided with the gear teeth, flexbile gear partly meshes with firm wheel case; Described connecting rod is arranged on the rear end of firm wheel case; Described handle is arranged on the rear end of connecting rod.
Preferably, the excircle of described ripple generation part is shaped as ellipse.
Preferably, described ripple generation part is hollow-core construction.
Due to the utilization of technique scheme, the utility model compared with prior art has following advantages:
The labour-saving spanner of the utility model scheme, by ripple generation part, flexbile gear and firm wheel case, form a kind of harmonic gear structure, because harmonic gear has larger gearratio, and principle that can coaxial line transmission, by adding up of rotating speed, made up the deficiency in moment, and the gear range of harmonic gear is very large, the size of gearratio depends on flexbile gear and the just division of the number of teeth of wheel case, can realize by less moment tighter screw or nut are turned on.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:
The structural representation that accompanying drawing 1 is a kind of labour-saving spanner described in the utility model;
The left view that accompanying drawing 2 is a kind of labour-saving spanner described in the utility model;
The A-A that accompanying drawing 3 is a kind of labour-saving spanner described in the utility model is to cutaway view;
Wherein: 1, sleeve; 2, flexbile gear; 3, firm wheel case; 4, connecting rod; 5, handle; 6, screw fit hole; 7, ripple generation part.
The specific embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As Figure 1-3, a kind of labour-saving spanner described in the utility model, comprises sleeve 1, flexbile gear 2, firm wheel case 3, connecting rod 4 and handle 5; The front end of described sleeve 1 is provided with screw fit hole 6, and the rear end of sleeve 1 is provided with ripple generation part 7; Described ripple generation part 7 is hollow-core construction, the excircle of ripple generation part 7 be shaped as ellipse; Described flexbile gear 2 is arranged on the outside of ripple generation part 7, between flexbile gear 2 and ripple generation part 7, is provided with bearing ball; Described ripple generation part 7 and flexbile gear 2 are all arranged in firm wheel case 3; On the inner ring of the outer ring of described flexbile gear 2 and just wheel case 3, be provided with the gear teeth, flexbile gear 2 and just wheel case 3 part engagements; The oval structure of ripple generation part 7 and hollow-core construction make ripple generation part 7 can carry out certain strain, and cooperation flexbile gear 2 can reduce the wearing and tearing of flexbile gear 2, increase the service life of flexbile gear 2; Described connecting rod 4 is arranged on the rear end of firm wheel case 3; Described handle 5 is arranged on the rear end of connecting rod 4.
Due to the utilization of technique scheme, the utility model compared with prior art has following advantages:
The labour-saving spanner of the utility model scheme, by ripple generation part, flexbile gear and firm wheel case, form a kind of harmonic gear structure, because harmonic gear has larger gearratio, and principle that can coaxial line transmission, by adding up of rotating speed, made up the deficiency in moment, and the gear range of harmonic gear is very large, the size of gearratio depends on flexbile gear and the just division of the number of teeth of wheel case, can realize by less moment tighter screw or nut are turned on.
Below be only concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, within all dropping on the utility model rights protection scope.
Claims (3)
1. a labour-saving spanner, is characterized in that: comprise sleeve (1), flexbile gear (2), firm wheel case (3), connecting rod (4) and handle (5); The front end of described sleeve (1) is provided with screw fit hole (6), and the rear end of sleeve (1) is provided with ripple generation part (7); Being shaped as of the excircle of described ripple generation part (7) is non-circular; Described flexbile gear (2) is arranged on the outside of ripple generation part (7), between flexbile gear (2) and ripple generation part (7), is provided with bearing ball; Described ripple generation part (7) and flexbile gear (2) are all arranged in firm wheel case (3); On the inner ring of the outer ring of described flexbile gear (2) and just wheel case (3), be provided with the gear teeth, flexbile gear (2) and just wheel case (3) part engagement; Described connecting rod (4) is arranged on the rear end of firm wheel case (3); Described handle (5) is arranged on the rear end of connecting rod (4).
2. labour-saving spanner according to claim 1, is characterized in that: the excircle of described ripple generation part (7) be shaped as ellipse.
3. labour-saving spanner according to claim 1, is characterized in that: described ripple generation part (7) is hollow-core construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816462.1U CN203738679U (en) | 2013-12-12 | 2013-12-12 | Labor-saving wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816462.1U CN203738679U (en) | 2013-12-12 | 2013-12-12 | Labor-saving wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203738679U true CN203738679U (en) | 2014-07-30 |
Family
ID=51338542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320816462.1U Expired - Fee Related CN203738679U (en) | 2013-12-12 | 2013-12-12 | Labor-saving wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203738679U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692387A (en) * | 2013-12-12 | 2014-04-02 | 苏州市职业大学 | Labor-saving wrench |
| CN108527217A (en) * | 2018-06-21 | 2018-09-14 | 安徽商贸职业技术学院 | One kind uses and convenient for adjusting convenient for labour-saving hardware spanner |
-
2013
- 2013-12-12 CN CN201320816462.1U patent/CN203738679U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692387A (en) * | 2013-12-12 | 2014-04-02 | 苏州市职业大学 | Labor-saving wrench |
| CN108527217A (en) * | 2018-06-21 | 2018-09-14 | 安徽商贸职业技术学院 | One kind uses and convenient for adjusting convenient for labour-saving hardware spanner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20141212 |
|
| EXPY | Termination of patent right or utility model |