CN2568370Y - Electric spanner - Google Patents
Electric spanner Download PDFInfo
- Publication number
- CN2568370Y CN2568370Y CN 02266589 CN02266589U CN2568370Y CN 2568370 Y CN2568370 Y CN 2568370Y CN 02266589 CN02266589 CN 02266589 CN 02266589 U CN02266589 U CN 02266589U CN 2568370 Y CN2568370 Y CN 2568370Y
- Authority
- CN
- China
- Prior art keywords
- guide pillar
- spill spin
- pillar pin
- spin block
- casing
- 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
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 210000003371 toe Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Images
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- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The utility model relates to an electric spanner, which comprises an electric machine (1), a casing (2), a rotary block (12), a balance block (15), a ratchet wheel (18) with a working shaft and a guide pillar pin pawl (22). The electric machine (1) is positioned in the tail end of the casing (2); the casing (2) forms a gun shape; a head (183) extending out of the casing is an output shaft head of the electric spanner. When the electric machine (1) drives the rotary block (12) to rotate and reaches a definite rotary speed, the balance block (15) on the rotary block (12) drives a slide block handle (16) to move outward through a centrifugal force, the slide block handle (16) presses the guide pillar pin pawl (22) through one end of a right angle type pressing plate (20), falls into a cylindrical slot (181) of the ratchet wheel (18) with the working shaft, and is in an engaging state, and the function of the electric spanner is realized. The utility model has the advantages that an engaged contacting area of the ratchet wheel (18) with the working shaft and the guide pillar pin pawl (22) is enlarged, and the electric machine achieves the same rotary speed and simultaneously achieves consistent length of an action period; besides, a pretightening force passing through a spring can be adjusted, and the utility model has higher periodical stability under the same rotary speed.
Description
Technical field
The utility model relates to a kind of electric tool, specifically belongs to a kind of motor-driven, centrifugal electric wrench.
Background technology
At present various in style at the electric wrench that is commercially available, be centrifugal autowrench mostly as 2412703Y number disclosed the sort of type of patent specification CN, as shown in Figure 4, it comprises casing 1 and interior motor 2 thereof, ratchet 5, band work dog end 6, ratchet 5 is fixed on the pawl base 3 by bearing pin 4, the rotating shaft 31 of pawl base 3 links to each other with the output shaft of motor 2 and together rotation, 6 positions that are positioned at corresponding ratchet 5 within the pawl base 3 of band work dog end, it stretches the output shaft that head 61 outside casing is electric wrench, on the interface of ratchet 5 and pawl base 3, pawl base 3 is provided with hoodle 32, the corresponding position of ratchet 5 then is provided with shrinkage pool 51, and is deflection states of ratchet 5 when shrinkage pool 51 that hoodle 32 falls on the ratchet.Rotation when motor 2 rotations and driving pawl base 3, when reaching certain rotating speed, pawl base 3 is decontroled by the ratchet 5 of its locking, so ratchet 5 deflection under action of centrifugal force, bump band work dog end 6 makes it to rotate, bump back rotating speed descends, ratchet 5 is resetted by pawl base 3 lockings again, when the rotating speed of pawl base 3 rises to certain rotating speed once more, repeat above-mentioned action, going round and beginning again to make band work dog end 6 do intermittently to rotate, thereby makes driving end work by the output shaft of motor 2, realizes the function of electric wrench.Yet the centrifugal autowrench of the sort of type is on overall periodic Control, because that the spring force of pawl base 3 locking ratchet 5 is difficult to is controlled, makes motor different in size causing of cycle occur when reaching identical rotating speed; When the electric wrench output shaft is braked suddenly because of accident, will directly cause the instantaneous braking of motor shaft simultaneously, thereby cause damage might for the coil of motor, motor shaft and pawl base 3 directly assemble on the other hand, also very bother in manufacturing and process.
Summary of the invention
Technical problem to be solved in the utility model provide a kind of when motor is reaching same rotational speed, to obtain with the work dog end do the cycle length of intermittently rotating relatively stable and also under same motor power the bigger centrifugal electric spanner of output torque.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: comprise motor, casing, spill spin block, balance weight and band work dog end, guide pillar pin pawl, motor is positioned at the afterbody of casing, casing is the pistol shape, and it stretches the output shaft head that head outside casing is electric wrench; Described motor, spill spin block, band work dog end are arranged on the same axial line, and the output shaft of motor connects the drive spill spin block by spline and rotates; Described spill spin block main body is the hollow convex column shape, and device has the balance weight of slip and slide block thereof to hold on this projection, and they can rotate with spill spin block; Device has bearing in the big end endoporus of described spill spin block, and as a supporting, and bearing is used as an interior spring bearing of band work dog end; The middle part design of described band work dog end has Chinese lute shape ratchet plate, and there are two cylinder grooves Chinese lute shape ratchet plate end; Described spill spin block its radially a side guide hole is arranged, wherein device has a guide pillar pin pawl, the center line of the center line of guide pillar pin pawl and two cylinder grooves of Chinese lute shape ratchet plate coincides, when guide pillar pin pawl falls into the cylinder groove of Chinese lute shape ratchet plate of band work dog end, promptly drive band work dog end and rotate, this is the duty of electric wrench; There is an arc circular groove at the middle part of described guide pillar pin pawl, which is provided with steel ball and spring; The pretightning force of described spring can be regulated; Described slide block is possessed a groove, and it can stir the square pressing plate, and described square pressing plate can rotate in supporting member, and the one end contacts with the head of guide pillar pin pawl; There is a shoulder end of described guide pillar pin pawl, this shoulder inboard and with relative spill spin block side between, device has one to compress spring.
During work, plug is connect, press down switch, the motor rotation also reaches certain rotating speed (more than the 5000RPM), balance weight on the spill spin block drives slide block by centrifugal force and holds outer moving, the groove of slide block is stirred the square pressing plate and it is rotated in supporting member, this moment the square pressing plate the head of an end pressing guide pillar pin pawl, and to overcome the pretightning force of the spring of the spring that acts on the guide pillar pin pawl and steel ball, thereby depress guide pillar pin pawl, at this moment the end periphery of guide pillar pin pawl is in engagement with regard to the cylinder groove that falls into band work dog end, and the square toes of the rotating shaft part of band work dog end by the end drive wrench socket and rotate and enter duty.The pretightning force of spring can be regulated, and wrench socket rotates and after entering the bump of duty, because of changeed by mechanical resistance the spill spin block rotating speed descended, and guide pillar pin pawl is by spring reset; When spill spin block rises to certain rotating speed once more, repeat above-mentioned action, going round and beginning again to make band work dog end do intermittently to rotate, and it stretches the output shaft that head outside casing is electric wrench, realizes the function of electric wrench.
Compared with prior art, advantage of the present utility model is to adopt the engaging structure of band work dog end and guide pillar pin pawl, and the area that both mesh contact increases, and makes motor reach action cycle length unanimity when reaching identical rotating speed; Can regulate by the pretightning force of spring in addition, make the utility model under same rotational speed, have higher stability of period again and solve general electric wrench tip and mesh problem unreliable and that service life is short.
Description of drawings
Fig. 1 is an installation diagram of the present utility model;
Fig. 2 is an electric wrench part assembling drawing of the present utility model;
Fig. 3 is the stereogram of band work dog end of the present utility model;
Fig. 4 is a kind of prior art structure chart;
Fig. 5 falls into the static map of arc circular groove for steel ball of the present utility model;
Fig. 6 is the static map of the end periphery of guide pillar pin pawl of the present utility model when breaking away from the ratchet cylinder groove;
Fig. 7 is the dynamic figure that steel ball of the present utility model breaks away from the arc circular groove;
Fig. 8 falls into the ingear dynamic figure of ratchet cylinder groove for the end cylinder table of guide pillar pin pawl of the present utility model;
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Fig. 1 to Fig. 8 is an embodiment of the present utility model, it includes motor 1 and casing 2 thereof, be arranged in the bearing 3 on the same axis of output shaft of motor 1,5,13, spill spin block 12, balance weight 15 and band work dog end 18, guide pillar pin pawl 22, motor 1 is positioned at the afterbody of casing 2, casing 2 is the pistol shape, the output shaft of motor 1 connects drive spill spin block 12 by spline 101, spill spin block 12 main bodys be one with the hollow convex column shape of the output axis coaxial arrangement of motor 1, spill spin block 12 is supported by ball bearing 3 with the output shaft link of motor 1, device has bearing 13 as second supporting in its big end endoporus, and bearing 13 is used as a spring bearing of band work dog end 18, promptly be bearing in the inner periphery of bearing 13 with the face of cylinder 184 of work dog end 18, another spring bearing 5 of this band work dog end 18 is rotating shaft part 182 places that are right after work square toes 183 at it, the middle part design of band work dog end 18 has Chinese lute shape ratchet plate 185, and Chinese lute shape ratchet plate 185 1 sides have two cylinder grooves 181,186; Spill spin block 12 its radially a side guide hole is arranged, wherein device has a guide pillar pin pawl 22, the center line of the center line of guide pillar pin pawl 22 and 185 two cylinder grooves of Chinese lute shape ratchet plate 181,186 coincides; There is a shoulder 221 end of this guide pillar pin pawl 22, between these shoulder 221 medial surfaces and relative spill spin block 12 sides, device has a compression spring 21, there is an arc circular groove 25 at the middle part of this guide pillar pin pawl 22, which is provided with steel ball 24 and spring 23, returning apparatus has the balance weight 15 and the slide block thereof of slip to hold 16 on the projection of spill spin block 12, and can be with spill spin block 12 rotations, slide block holds 16 has a groove 17 can stir square pressing plate 20, square pressing plate 20 can rotate in supporting member 19, and the one end contacts with the head 221 of guide pillar pin pawl 22.
During work, plug 8 is connect, press down switch 7, motor 1 rotation also reaches certain rotating speed (more than the 5000RPM), balance weight 15 on the spill spin block 12 drives slide block by centrifugal force and holds 16 outer moving, slide block holds 16 to be had a groove 17 to stir square pressing plate 20 and it is rotated in supporting member 19, this moment a square pressing plate end pressing guide pillar pin pawl 22 of 20 head 221, and to overcome the pretightning force of the spring 23 of the spring 21 that acts on the guide pillar pin pawl 22 and steel ball 24, thereby depress guide pillar pin pawl 22, the end periphery of guide pillar pin pawl 22 is in engagement with regard to the cylinder groove 181 that falls into band work dog end 18, and the square toes 183 of the rotating shaft part 182 of band work dog end 18 by the end drive wrench sockets and rotate and enter duty.The pretightning force of spring 23 can be regulated by screw 26, and wrench socket rotates and after entering the bump of duty, because of changeed by mechanical resistance spill spin block 12 rotating speeds descended, and guide pillar pin pawl 22 is resetted by spring 21; When spill spin block 12 rises to certain rotating speed once more, repeat above-mentioned action, going round and beginning again to make band work dog end 18 do intermittently to rotate, and its head 183 of stretching outside casing is the output shaft of electric wrench, thereby realizes the function of electric wrench by the output shaft of motor 1.
Claims (4)
1. an electric wrench comprises motor (1), casing (2), spill spin block (12), balance weight (15) and band work dog end (18), guide pillar pin pawl (22), motor (1) is positioned at the afterbody of casing (2), casing (2) is the pistol shape, it stretches the output shaft head that head (183) outside casing is electric wrench, it is characterized in that:
A. described motor (1), spill spin block (12), band work dog end (18) are arranged on the same axial line, and the output shaft of motor (1) connects drive spill spin block (12) by spline (101) and rotates;
B. described spill spin block (12) main body is the hollow convex column shape; Device has the balance weight (15) and the slide block thereof of slip to hold (16) on this projection, and they can rotate with spill spin block (12);
Device has bearing (13) as a supporting in the big end endoporus of c. described spill spin block (12), and bearing (13) is used as an interior spring bearing of band work dog end (18);
The middle part design of d. described band work dog end (18) has Chinese lute shape ratchet plate (185), and there are two cylinder grooves (181), (186) in Chinese lute shape ratchet plate (185) end;
E. described spill spin block (12) its radially a side guide hole is arranged, wherein device has a guide pillar pin pawl (22), the center line of the center line of guide pillar pin pawl (22) and Chinese lute shape ratchet (185) two cylinder grooves of plate (181), (186) coincides, when guide pillar pin pawl (22) falls into the cylinder groove (181) of Chinese lute shape ratchet plate (185) of band work dog end (18) or (186), promptly driving band work dog end (18) and rotate, is the duty of electric wrench;
There is an arc circular groove (25) at the middle part of f. described guide pillar pin pawl (22), which is provided with steel ball (24) and spring (23).
2. electric wrench as claimed in claim 1, it is characterized in that: described slide block is held (16) a groove (17), it can stir square pressing plate (20), and square pressing plate (20) can rotate in supporting member (19), and the one end contacts with the head (221) of guide pillar pin pawl (22).
3. electric wrench as claimed in claim 1 is characterized in that: there is a shoulder (221) end of described guide pillar pin pawl (22), and between this shoulder (221) medial surface and relative spill spin block (12) side, device has a compression spring (21).
4. electric wrench as claimed in claim 1 is characterized in that: the pretightning force of described spring (23) can be regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02266589 CN2568370Y (en) | 2002-08-23 | 2002-08-23 | Electric spanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02266589 CN2568370Y (en) | 2002-08-23 | 2002-08-23 | Electric spanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2568370Y true CN2568370Y (en) | 2003-08-27 |
Family
ID=33732367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02266589 Expired - Fee Related CN2568370Y (en) | 2002-08-23 | 2002-08-23 | Electric spanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2568370Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112223192A (en) * | 2020-09-05 | 2021-01-15 | 缙云县赵氏工具有限公司 | Electric wrench |
-
2002
- 2002-08-23 CN CN 02266589 patent/CN2568370Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112223192A (en) * | 2020-09-05 | 2021-01-15 | 缙云县赵氏工具有限公司 | Electric wrench |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |