CN201304623Y - Double offset ring ratchet wrench - Google Patents
Double offset ring ratchet wrench Download PDFInfo
- Publication number
- CN201304623Y CN201304623Y CNU2008201652587U CN200820165258U CN201304623Y CN 201304623 Y CN201304623 Y CN 201304623Y CN U2008201652587 U CNU2008201652587 U CN U2008201652587U CN 200820165258 U CN200820165258 U CN 200820165258U CN 201304623 Y CN201304623 Y CN 201304623Y
- Authority
- CN
- China
- Prior art keywords
- ratchet
- ratchets
- piece
- circular hole
- handle
- 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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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The utility model relates to a manual tool, which aims to provide a double offset ring ratchet wrench with large torque, long service life, simple structure as well as convenient and easy manufacture. The utility model adopts the technical proposal that annular ratchet wheels which can be meshed to drive a bolt are mounted on the head part of at least one of both ends of a handle of the double offset ring ratchet wrench, the ratchet wheels are positioned in a circular hole on the head part of the handle, an accommodating groove is also formed on the wall part of the circular hole, a ratchet block is arranged in the groove, and the ratchets on the ratchet block is matched with one-way ratchets on the outer periphery of the ratchet wheels; the ratchet block is pushed by an elastic body so as to be meshed and contacted with the ratchet wheels. The utility model is characterized in that the ratchets on the outer periphery of the ratchet wheels adopt concave arc ratchets while that on the ratchet block adopt convex arc ratchets matched with the ratchets of the ratchet wheels.
Description
Technical field
The utility model relates to a kind of hand-operated tools, is specially a kind of plum blossom ratchet spanner.
Background technology
At present, existing single direction ratchet double offset ring spanner, an end of its handle is a head, and head is provided with a single direction ratchet mechanism, also is provided with a storage tank on the handle, and the ratchet piece of single direction ratchet mechanism is arranged in the storage tank.Also be provided with spring in the storage tank, be used to push ratchet piece and ratchet engaged.Ratchet ratchet on the existing single direction ratchet double offset ring spanner and ratchet piece ratchet all adopt zigzag structure; Because each tooth all is a straight-tooth, the contact-making surface of ratchet ratchet and ratchet piece ratchet is less, needs bigger moment ability elasticity bolt.
The way commonly used that increases the contact-making surface of ratchet ratchet and ratchet piece ratchet at present is: by the volume of increase ratchet piece, thereby reach the contact-making surface that increases ratchet ratchet and ratchet piece ratchet.But because the size of ratchet piece is subjected to the restriction of storage tank width, the size of storage tank then is subject to the width of spanner handle and can't strengthens arbitrarily, thereby the torsion that the ratchet piece be can bear can't improve.If strengthen the width of storage tank rashly, then can influence the intensity of spanner handle.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, and a kind of improvement of plum blossom ratchet spanner is provided, and this spanner should have that moment of torsion is big, the characteristics of long service life, and simple in structure, easily manufactured easily.
The utility model is finished by following technical solution: a kind of plum blossom ratchet spanner, at least one termination portion in its handle two ends is equipped with engageable and drives the annular ratchet of bolt, this ratchet is positioned in the circular hole of handle head, the wall portion of circular hole also is provided with a storage tank, be provided with a ratchet piece in the groove, the unidirectional ratchet of ratchet on the ratchet piece and ratchet outer circumference surface is complementary; The ratchet piece is also pushed by an elastomer, so that keep this ratchet piece to contact with ratchet engaged; It is characterized in that the ratchet on the described ratchet outer circumference surface is the spill circle-arc tooth, the ratchet on the ratchet piece then is the convex shaped arc tooth that is complementary with the ratchet ratchet.
Described storage tank is the bright shape of first quarter moon.
Described ratchet is positioned in the circular hole of handle head by jump ring.
Described elastomer is a metal spring.
Described convex shaped arc tooth is the powder metallurgy injection-compression molding.
The beneficial effects of the utility model are: under the prerequisite that does not change physical dimension, change ratchet ratchet on original single direction ratchet double offset ring spanner and ratchet piece ratchet into circular-arc tooth structure from straight-tooth shape structure, thereby increased the contact area of ratchet ratchet and ratchet piece ratchet, operating mode when having improved ratchet engagement, thereby enlarged markedly the moment of torsion of spanner, enlarge the range of application of spanner, improved user's operating efficiency.And the design of total is also simple, and it is also convenient to make.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the right view of ratchet among Fig. 1.
Fig. 3 is the structure for amplifying schematic diagram of ratchet wheel block among Fig. 1.
Fig. 4 is that the A of ratchet wheel block among Fig. 3 is to structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
As shown in the figure, this plum blossom ratchet spanner, the two ends, the left and right sides of spanner handle 1 respectively have a head 4, have a circular hole 6 on the head.Be shaped on the jump ring locating slot on the circular-hole internal-wall of Wrench head, ratchet 5 be rotatably positioned in circular hole by jump ring (the jump ring locating slot of jump ring and spanner circular-hole internal-wall all omits, and only shows the jump ring detent 5-1 on the ratchet in Fig. 2).Also be provided with storage tank 2 on the circular-hole internal-wall, be provided with a ratchet piece 7 that is complementary with the ratchet ratchet in the storage tank, one of ratchet piece is distolaterally pushed by an elastomer 3, so that the ratchet piece is meshed with the ratchet ratchet.It more than is the conventional structure of plum blossom ratchet spanner.
Improvement of the present utility model is: change spill circle-arc tooth 5-2 into around the ratchet that distributes on the ratchet outer circumference surface and (that is: cross the ratchet axis as the perspective plane.The projection of each ratchet on the perspective plane is circular arc), the convex shaped arc tooth 7-1 (clearly illustrating among Fig. 3, Fig. 4) that is complementary with the ratchet ratchet is set on the ratchet piece.After the unidirectional tooth-shape structure of original straight line makes circle-arc tooth into, strengthen contact area, thereby can in the working space of minimum, reach maximum torsion.
In addition, described storage tank 2 is made moon shape; Elastomer 3 recommends to adopt metal spring.
As further improvement of the utility model, the spill circular arc ratchet of described ratchet adopts fine finishining to form; The ratchet piece then adopts powder metallurgy injection moulding, thereby reaches best coincideing, and has maximum moment of torsion.
Claims (4)
1, plum blossom ratchet spanner, annular ratchet (5) engageable and the driving bolt is equipped with at least one termination portion (4) in its handle (1) two ends, this ratchet is positioned in the circular hole (6) of handle head, the wall portion of circular hole also is provided with a storage tank (2), be provided with a ratchet piece (7) in the groove, the unidirectional ratchet of ratchet on the ratchet piece and ratchet (5) outer circumference surface is complementary; The ratchet piece is also pushed by an elastomer (3), so that keep this ratchet piece to contact with ratchet engaged; It is characterized in that the ratchet on the described ratchet outer circumference surface is spill circle-arc tooth (5-2), the ratchet on the ratchet piece then is the convex shaped arc tooth (7-1) that is complementary with the ratchet ratchet.
2, plum blossom ratchet spanner according to claim 1 is characterized in that described ratchet is positioned in the circular hole of handle head by jump ring.
3, plum blossom ratchet spanner according to claim 1 is characterized in that described elastomer (3) is a metal spring.
4, plum blossom ratchet spanner according to claim 1 is characterized in that described convex shaped arc tooth is powder metallurgy injection moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201652587U CN201304623Y (en) | 2008-10-06 | 2008-10-06 | Double offset ring ratchet wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201652587U CN201304623Y (en) | 2008-10-06 | 2008-10-06 | Double offset ring ratchet wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201304623Y true CN201304623Y (en) | 2009-09-09 |
Family
ID=41097085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201652587U Expired - Fee Related CN201304623Y (en) | 2008-10-06 | 2008-10-06 | Double offset ring ratchet wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201304623Y (en) |
-
2008
- 2008-10-06 CN CNU2008201652587U patent/CN201304623Y/en not_active Expired - Fee Related
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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: 20090909 Termination date: 20171006 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |