CN205799326U - Ratchet spanner capable of reversing - Google Patents
Ratchet spanner capable of reversing Download PDFInfo
- Publication number
- CN205799326U CN205799326U CN201620550616.0U CN201620550616U CN205799326U CN 205799326 U CN205799326 U CN 205799326U CN 201620550616 U CN201620550616 U CN 201620550616U CN 205799326 U CN205799326 U CN 205799326U
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- ratchet
- reversing
- chock
- spanner capable
- elastic
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Abstract
The utility model discloses a kind of ratchet spanner capable of reversing, this ratchet spanner capable of reversing includes including handle and head, head is provided with base aperture, the ratchet being wholely set it is provided with in described base aperture, sleeve and the magnetic sheet at its top, described base aperture sidewall is provided with control chamber, described control chamber is provided with ratchet and makeshift valve, described makeshift valve controls the different ratchet increments of ratchet and is connected with the hook tooth on described ratchet, it is provided with antioverloading mechanism on the sidewall in described control chamber, described antioverloading mechanism and detent contact, make user when narrow and small rotation space carries out bolt tightening operation, the unidirectional of different directions can be realized by the way of repeatedly rotating tighten.
Description
Technical field
This utility model relates to a kind of spanner field, particularly to a kind of ratchet spanner capable of reversing.
Background technology
Spanner very common in our life, is primarily used to keep in repair the plant equipment with screw.Ratchet wrench
Hands is the one in spanner, and it is wider that it is suitable for, and ratchet spanner mainly applies at narrow space, example automobile spark plug,
Automobile chassis, engine internal, the dismounting of automobile engine shell, plates of automobile, water tank, cooling pumping, oil filter, cold
But compressor.Full polishing, Asia, surface light, wear resistant and rustproof is splendid;Specialty Design has only to 5 ° of action rotating nuts;Unidirectional drive
Dynamic, reverse clockwise, convenient agility, the most quickly.
Authorization Notice No. is that the Chinese patent of CN205033128U discloses a kind of ratchet reversing arrangement, and it comprises a spine
Wheel, the first clip unit, second clip list group and a switch unit.This switch unit has a brake
And a shifting part, operate this switch unit and make first the first pushing and pressing part of this brake to terminating in this first clip unit
One first face of being pulled, first pulled with this by first extension line of second axis and this first pushing and pressing part
Face intersect angle be substantially 90 degree, operate this switch unit and make this brake second pushing and pressing part support terminate in this second
The angle that second pulled is intersected by face of pulling is substantially 90 degree, can ensure that this first clip unit or this single tool of the second clip
Having preferably gmatjpdumamics, operation torsion does not runs off.
Although using above technology to solve the commutation function of ratchet spanner, but the brake of its ratchet being divided into two unit
And controlled by same shifting part, in order to obtain more preferable gmatjpdumamics, its first clip unit and the second clip unit, all set
Put and each self-corresponding structure vertical by face of pulling, say, that the angle of the first clip unit and the second clip unit is more than
135 °, then the first brake and the second brake are just two almost parallel strips, and shifting part is in two strips
Between shape brake, and two brakes of regulation and control simultaneously, then the rotation that just will necessarily there is brake tends to relatively big, unidirectional
Can become the most unstable during stopper, its rotation simultaneously tends to excessive being likely to and causes there is resistance card between brake and ratchet
The state connect, is possible to cause hook tooth or brake tooth to break in this case.
Utility model content
The purpose of this utility model is to provide a kind of ratchet spanner capable of reversing, has that stopper is stable, that flank of tooth loss is little is excellent
Point.
Above-mentioned technical purpose of the present utility model has the technical scheme that
A kind of ratchet spanner capable of reversing, including handle and head, described head is provided with base aperture, sets in described base aperture
Be equipped with the ratchet and sleeve being wholely set, described base aperture sidewall be provided with control chamber, described control intracavity be provided with ratchet and
Makeshift valve, described ratchet is divided into the tooth district that two increment directions are different, and described makeshift valve controls the different tooth districts of ratchet with described
Hook tooth on ratchet connects, and the sidewall in described control chamber is provided with obstruct chock, and described obstruct chock is with elastic construction even
Connecing, described ratchet abuts with intercepting chock.
Using said structure, head is provided with base aperture, and for installing the ratchet and sleeve being wholely set, sleeve is socketed in
On screwdriver bit or outer-hexagonal bolt, screwdriver bit can be plurality of specifications, and a ratchet spanner just realizes plurality of specifications in this case
The unlatching of screw or screw；
Ratchet and the click-fit controlling intracavity being arranged on base aperture sidewall use, and click constitutes one-directional rotation
Mechanism so that user, when narrow and small rotation space carries out bolt tightening operation, can realize unidirectional by the way of repeatedly swinging
Tighten；
The ratchet increment that makeshift valve controls ratchet different is connected with ratchet, and two different increments are connected prevention spine with ratchet
The rotation direction of wheel is different, say, that by the control of makeshift valve, ratchet spanner can realize the most unidirectional
Drive bolt；
The obstruct chock arranged on sidewall and elastic construction form antioverloading mechanism, when pulling that use this utility model relates to
Hands is pulled and has been got rusty or time some other mode causes connecting the screw of tension or bolt, excessive pull spanner and may cause
Deformation of tooth surface on ratchet or ratchet, is accomplished by arranging an overload mechanism this time and makes ratchet and pawl depart from, thus rises
To the protective effect to spanner.
More preferably: described sidewall is provided with elastic pressure road, and described obstruct chock and described elastic construction are respectively provided with
In elasticity pressure road, the zone line that described elastic construction surrounds sectional area in channel direction is less than intercepting chock at passage
It is provided with guiding circle on sectional area on direction, elastic construction and obstruct chock.
Using said structure, when spanner is in running order, the side pressure surface of ratchet is pressed against on obstruct chock, gives and intercepts
One lateral pressure of chock, when ratchet and pawl is in big stress, ratchet promotes the centre intercepting chock towards two elastomer block
Regional movement, when intercepting the rounding region that chock departs from elastomer block, and now intercepts chock and is no longer influenced by elastomer block at ratchet
Holding power in thrust direction, smaller resistance, intercept chock and promoted rapidly, corresponding ratchet departs from rapidly spine
Wheel, thus play protection ratchet mechanism, prevent the effect that the tooth on ratchet and pawl deforms.
More preferably: described elastic construction is two or more rigid elastic being uniformly arranged on elastic pressure road inwall
Block or described elastic construction are rigid elastic c-type tubular construction.
Using said structure, the power needed for deforming due to ratchet is relatively big, and elastic construction selects to use rigid elastic block, or system
The c-type pipe become, compared with elastomer block, enhanced convenience is wanted in the manufacture of c-type elastic tube and installation, but in the stability controlled not
Such as elastomer block.
More preferably: be additionally provided with in described elastic pressure road and push away stopping bar, push away stopping bar one end described in and be arranged on two bullets
The mid portion in Xing Ya road, one end is locked on the lateral wall of described wrench body.
Use said structure, when intercepting the zone line that chock enters elastomer block, intercept chock drive and be arranged on two
One end pushing away stopping bar of the centre of elastomer block, outwards pushes throw-out lever, only need to be by only needs reset and intercept chock when
Push rod pushes inward, and only has less frictional force owing to now intercepting chock power suffered on throw-out lever direction, and throw-out lever can
Easily obstruct chock is pushed into reset.
More preferably: the structure of described ratchet is straight spur gear, described ratchet include ratchet face, reversing groove with
And side pressure surface, described side pressure surface is when ratchet is in running order and intercepts chock conflict, and described ratchet face is arc-shaped, described
The pawl teeth that the center line with arc surface is symmetrical, the reference circle of the hook tooth of described pawl teeth and described ratchet it is provided with on ratchet face
The circular arc of position is vertical.
Using said structure, ratchet uses gear structure can guide to one sliding of pawl teeth overload when, profit
Playing a role in the antioverloading mechanism when there is overload condition, spanner is ratchet when rotating toward the direction not stoped by spanner ratchet
Tooth also can reduce resistance with the form design of Involute gear, reduce noise generation；
More preferably: described ratchet includes that ratchet face, reversing groove and side pressure surface, described side pressure surface are at ratchet
Conflicting with obstruct chock during duty, described ratchet face is arc-shaped, and described ratchet face is provided with the center line with arc surface
Symmetrical pawl teeth, described pawl teeth is vertical with the circular arc of the reference circle position of the hook tooth of described ratchet.
Using said structure, pawl teeth, along the centrosymmetry of arc surface, which forms the pawl teeth of two-way control, only
Ratchet to be stirred can realize double-direction control, and pawl teeth is vertical with the arc position of the reference circle of described hook tooth, and this is in fact
A bit of circular arc, in the range of it, the direction of the power that ratchet applies is close to tangent to periphery direction, and biasing effect can be made good.
More preferably: described sleeve is provided with interior hexagonal endoporus, the drift angle of described interior hexagonal is provided with circular arc post
Shape groove.
Using said structure, in sleeve, hexagonal arranges and is provided with arc-shaped groove on the drift angle of interior hexagonal simultaneously, and this is just
The interior shape making set not only can regard interior hexagonal as but also can regard Flos Mume as, the most not only can fill interior hexagonal screwdriver bit but also can
To fill the screwdriver bit of Flos Mume.
More preferably: described makeshift valve includes steering head, spring catch, spring, toggle, described spring catch and described group
Button connects, and described spring housing is inside described spring catch, and described spring catch inserts steering head endoporus, and described spring is longer than described bullet
Spring pin is connected with steering head.
Using said structure, spring catch one end is connected on toggle, and the other end is socketed with steering head, and spring catch is to steering head
Thering is provided and support and location, toggle is turned to by control spring catch thus controls toggle and turn to, and then controls turning to of ratchet, spring
Spring within Xiao is connected with steering head, provides the scalability in spring catch direction to steering head, so that ratchet is on edge
Increase power of the unloading ability between ratchet and pawl during the motion of rotatable direction, thus reduce deterioration.
More preferably: on the handle of described ratchet spanner capable of reversing, be provided with anti-skidding glue-line.
Using said structure, anti-skidding glue-line can play anti-skidding effect in use, and gelatinous layer can play necessarily simultaneously
Cushioning effect.
More preferably: described sleeve is provided with magnetic sheet away from opening part.
Using said structure, screwdriver bit is typically all with magnet steel as material, and the magnetic sheet that top is arranged can make taking of screwdriver bit
Convenient, also make the dropping of screwdriver bit during using；
In sum, this utility model has the advantages that.
Makeshift valve controls two-way ratchet and connects respectively at ratchet, thus plays and realize spanner and existing clockwise and anticlockwise
One-directional rotation in both direction controls, and sidewall is provided with antioverloading mechanism simultaneously, it is achieved that pulling big turning with ratchet spanner
During square bolt, it is to avoid torque exceedes the maximum load of ratchet structure and causes the situation of deformation of tooth surface, makes the use of ratchet spanner
More reasonable, increase the service life.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the sleeve ratchet spanner upward of embodiment one；
Fig. 2 is the overall structure schematic diagram of the sleeve ratchet spanner down of embodiment one；
Fig. 3 is the explosive view of the ratchet spanner of embodiment one, it is shown that the structure of inner body；
Fig. 4 is the internal structure schematic diagram of the head of embodiment one, it is shown that the internal structure of ratchet spanner；
Fig. 5 is the structural representation of the affixed screwdriver bit of hexagonal magnetic connected with sleeve of embodiment one.
In figure, 1. handle；2. head；3. base aperture；21. control chamber；31. sleeves；32. top covers；33. ratchets；34. spine
Pawl；41. toggles；42. springs；43. spring catch；44. steering heads；51. push away stopping bar；52. intercept chock；53. elastomer block；321. magnetic
Plate；341. ratchet face；342. reversing groove；343. side pressure surface；7. the affixed screwdriver bit of magnetic；71. affixed bars；72. driver bits.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model
The present embodiment can be made after reading this specification by field technique personnel as required does not has the amendment of creative contribution, but
As long as all being protected by Patent Law in right of the present utility model.
Embodiment 1: ratchet spanner capable of reversing, as shown in Figure 1-2, including head 2 and handle 1, head 2 is provided with commutation and uses
Toggle 41, top cover 32 and interior Hexagonal jacket 31, sleeve 31 is socketed on screwdriver bit or outer-hexagonal bolt, and screwdriver bit can be
Plurality of specifications, ratchet 33 spanner just realizes the unlatching of screw of plurality of specifications or screws in this case.
With reference to Fig. 3, head 2 has individual base aperture 3, is provided with ratchet 33 ring, sleeve 31 and at Qi Ding in described base aperture 3
The magnetic sheet 321 that portion is connected with top cover 32, screwdriver bit is typically all with magnet steel as material, and the magnetic sheet 321 that top is arranged can make screwdriver bit
Take convenient；Base aperture 3 has part hollow out to form control chamber 21 near the sidewall that handle 1 goes out, and arranges in controlling chamber 21
Have ratchet 34 and makeshift valve 4, ratchet 34 and ratchet 33 to form one-directional rotation system, ratchet 34 include reversing groove 342, reversing groove with
And side pressure surface 343, makeshift valve 4 includes toggle 41, spring, spring catch 43, commutation head, and at the two of sidewall, hollow part is provided with anti-mistake
Loading system, including pushing away stopping bar 51, intercepting chock 52 and the elastomer block 53 being contained in hollow out passage.
With reference to Fig. 4, figure can be seen that, in the combinative structure of ratchet 33 ratchet 34, the structure of ratchet 33 is straight tooth column
Gear, ratchet 34 includes that reversing groove 342, reversing groove and side pressure surface 343, reversing groove 342 are arc-shaped, reversing groove 342 sets
It is equipped with ratchet 34 tooth that the center line with arc surface is symmetrical, the circular arc of the reference circle position of ratchet 33 tooth of ratchet 34 tooth and ratchet 33
Vertically, now ratchet 33 can only rotate clockwise, and rotates counterclockwise and is obstructed.
The reversing groove of ratchet 34 is connected with spring catch 43 with steering head 44, and spring catch 43 other end is connected on toggle 41,
Spring catch 43 provides to steering head 44 and supports and location, and toggle 41 is turned to by control spring catch 43 thus controls toggle 41 turns
To, so control ratchet 34 locking turn to, the spring within spring catch 43 is connected with steering head 44, provides to steering head 44
The scalability in spring catch 43 direction so that ratchet 34 increase when moving along rotatable direction ratchet 33 and ratchet 34 it
Between power of unloading ability, thus reduce deterioration.
Now, when spanner rotates counterclockwise, the piezometric surface of ratchet 34 is conflicted with intercepting chock 52, and ratchet 34 is given and intercepted plug
52 1 lateral pressures of block, promote obstruct chock 52 to move to two described elastomer block 53 zone lines, and two elastomer block 53 form
The sectional area in region of centre be slightly less than the sectional area intercepting seben, elastomer block 53 with intercept the part setting that chock 52 contacts
The guiding circle having rounding and intercept on chock 52 connects, and when ratchet 33 and ratchet 34 are in big stress, ratchet 34 promotes
Intercept the chock 52 zone line motion towards two elastomer block 53, when intercepting the rounding region that chock 52 departs from elastomer block 53, by
Broadly falling into rigid smooth material in elastic and obstruct chock 52, frictional force each other is less, and now intercepts chock 52 not
Again by the elastomer block 53 power in ratchet 34 thrust direction, intercepting chock 52 and promoted rapidly, corresponding ratchet 34 takes off rapidly
From ratchet 33, thus play the effect that protection ratchet 33 mechanism prevents the tooth on ratchet 33 and ratchet 34 from deforming；
When intercepting the zone line that chock 52 enters elastomer block 53, intercept chock 52 drive and be arranged on two elastomer block 53
One end pushing away stopping bar 51 of centre, throw-out lever is outwards pushed, only need to be by thrust needs reset and intercept chock 52 when
Bar pushes inward, and only has less frictional force owing to now intercepting chock 52 power suffered on throw-out lever direction, and throw-out lever can
Easily obstruct chock 52 is pushed into reset.
With reference to Fig. 5, the solid screwdriver bit of hexagonal magnetic 7 connected with sleeve 31 is made up of driver bit 72 and solid reach bar portion 71,
Driver bit 72 shown in figure is merely illustrative, can be replaced by other types driver bit 72 in actual product；
Embodiment 2, difference from Example 1 is, the elastic construction of embodiment 2 be set to c-type elastic tube rather than
Be arranged on the rigid elastic block in elastic pressure road, comparatively speaking, c-type pipe at this province's spanner volume with regard in the case of smaller
It is more easy to produce and install, but owing to c-type pipe is integrated manufacture, itself adjustable elastic threshold value model in narrow and small elastic pressure road
For enclosing relative resilient block less and stable not as elastomer block on Impact direction.
Claims (10)
1. a ratchet spanner capable of reversing, including handle (1) and head (2), is characterized in that: described head (2) is provided with pedestal
Hole (3), is provided with the ratchet (33) and sleeve (31) being wholely set in described base aperture (3), described base aperture (3) sidewall is arranged
Having control chamber (21), be provided with ratchet (34) and makeshift valve (4) in described control chamber (21), described ratchet is divided into two increment sides
To different tooth districts, described makeshift valve (4) controls the different tooth districts of ratchet (34) and is connected with the hook tooth on described ratchet (33),
Being provided with obstruct chock on the sidewall of described control chamber (21), described obstruct chock is connected with elastic construction, described ratchet (34)
Abut with intercepting chock.
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: described sidewall is provided with elastic pressure road, described
Intercepting chock (52) and described elastic construction is arranged in elastic pressure road, the zone line that described elastic construction surrounds is along passage
Sectional area on direction, less than intercepting the chock (52) sectional area in channel direction, elastic construction and obstruct chock is respectively provided with
There is guiding circle.
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: described elastic construction be two or more uniformly
The rigid elastic block or the described elastic construction that are arranged on elastic pressure road inwall are rigid elastic c-type tubular construction.
Ratchet spanner capable of reversing the most according to claim 2, is characterized in that: is additionally provided with in described elastic pressure road and pushes away stopping bar
(51), described in push away stopping bar (51) one end and be arranged on the mid portions in two elastic pressure roads, one end is locked on described wrench body
Lateral wall.
Ratchet spanner capable of reversing the most according to claim 2, is characterized in that: the structure of described ratchet (33) is straight tooth column
Gear.
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: described ratchet (34) include ratchet face (341),
Reversing groove (342) and side pressure surface (343), described side pressure surface (343) is when ratchet (34) is in running order and intercepts chock
(52) conflicting, described ratchet face (341) is arc-shaped, and described ratchet face (341) is provided with the center line symmetry with arc surface
Pawl teeth, described pawl teeth is vertical with the circular arc of the reference circle position of the hook tooth of described ratchet (33).
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: described sleeve (31) is provided with in interior hexagonal
Hole, the drift angle of described interior hexagonal is provided with circular arc cylindrical recesses.
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: described makeshift valve (4) include steering head (44),
Spring catch (43), spring (42), toggle (41), described spring catch (43) and described toggle (41) connect, and described spring (42) overlaps
Internal at described spring catch (43), described spring catch (43) inserts steering head (44) endoporus, and described spring (42) is longer than described bullet
Spring pin (43) is connected with steering head (44).
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: the handle (1) of described ratchet spanner capable of reversing
On be provided with anti-skidding glue-line.
Ratchet spanner capable of reversing the most according to claim 1, is characterized in that: described sleeve is provided with magnetic away from opening part
Plate (321), described sleeve (31) place has connected the affixed screwdriver bit of hexagonal magnetic (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550616.0U CN205799326U (en) | 2016-06-08 | 2016-06-08 | Ratchet spanner capable of reversing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550616.0U CN205799326U (en) | 2016-06-08 | 2016-06-08 | Ratchet spanner capable of reversing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205799326U true CN205799326U (en) | 2016-12-14 |
Family
ID=58141312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620550616.0U Active CN205799326U (en) | 2016-06-08 | 2016-06-08 | Ratchet spanner capable of reversing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205799326U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895065A (en) * | 2017-04-26 | 2017-06-27 | 上海舜诺机械有限公司 | A kind of accurate torque check washer |
| CN107378839A (en) * | 2017-08-14 | 2017-11-24 | 国家电网公司 | Ratchet spanner |
| CN107631087A (en) * | 2017-10-27 | 2018-01-26 | 红塔烟草(集团)有限责任公司 | Valve opening/closing device |
| CN107650247A (en) * | 2017-09-09 | 2018-02-02 | 江苏凯宇建材科技有限公司 | Built-in reinforcing mat warming plate and its production mould and technique |
| CN107834358A (en) * | 2017-10-30 | 2018-03-23 | 江苏金山动力科技有限公司 | Ignition plug for I. C. engine |
| WO2019037570A1 (en) * | 2017-08-23 | 2019-02-28 | 上海齐绘机电科技有限公司 | A ratchet assembly |
| CN109531484A (en) * | 2019-01-10 | 2019-03-29 | 李�远 | A kind of dedicated ratchet wrench of railway |
| CN112377001A (en) * | 2020-11-30 | 2021-02-19 | 广东电网有限责任公司江门供电局 | Electric cabinet spoon |
| CN112548948A (en) * | 2020-11-23 | 2021-03-26 | 中国长江电力股份有限公司 | Super nut dismounting tool and dismounting method |
| CN112743480A (en) * | 2019-10-31 | 2021-05-04 | 襄阳中车电机技术有限公司 | Large-scale round nut locking device |
| CN113352259A (en) * | 2021-07-13 | 2021-09-07 | 宁国市利远精密制造厂 | Manual impact wrench |
| CN113374445A (en) * | 2021-07-29 | 2021-09-10 | 李诗淳 | Well head valve rotating device applicable to narrow space for oil exploitation |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895065A (en) * | 2017-04-26 | 2017-06-27 | 上海舜诺机械有限公司 | A kind of accurate torque check washer |
| CN107378839A (en) * | 2017-08-14 | 2017-11-24 | 国家电网公司 | Ratchet spanner |
| WO2019037570A1 (en) * | 2017-08-23 | 2019-02-28 | 上海齐绘机电科技有限公司 | A ratchet assembly |
| CN107650247B (en) * | 2017-09-09 | 2023-08-08 | 江苏凯宇建材科技有限公司 | Built-in reinforcing mesh insulation board, production mould and process thereof |
| CN107650247A (en) * | 2017-09-09 | 2018-02-02 | 江苏凯宇建材科技有限公司 | Built-in reinforcing mat warming plate and its production mould and technique |
| CN107631087A (en) * | 2017-10-27 | 2018-01-26 | 红塔烟草(集团)有限责任公司 | Valve opening/closing device |
| CN107834358A (en) * | 2017-10-30 | 2018-03-23 | 江苏金山动力科技有限公司 | Ignition plug for I. C. engine |
| CN107834358B (en) * | 2017-10-30 | 2019-12-31 | 江苏金山动力科技有限公司 | Spark plug for internal combustion engine |
| CN109531484A (en) * | 2019-01-10 | 2019-03-29 | 李�远 | A kind of dedicated ratchet wrench of railway |
| CN112743480A (en) * | 2019-10-31 | 2021-05-04 | 襄阳中车电机技术有限公司 | Large-scale round nut locking device |
| CN112548948A (en) * | 2020-11-23 | 2021-03-26 | 中国长江电力股份有限公司 | Super nut dismounting tool and dismounting method |
| CN112377001A (en) * | 2020-11-30 | 2021-02-19 | 广东电网有限责任公司江门供电局 | Electric cabinet spoon |
| CN113352259A (en) * | 2021-07-13 | 2021-09-07 | 宁国市利远精密制造厂 | Manual impact wrench |
| CN113374445A (en) * | 2021-07-29 | 2021-09-10 | 李诗淳 | Well head valve rotating device applicable to narrow space for oil exploitation |
| CN113374445B (en) * | 2021-07-29 | 2024-03-19 | 李诗淳 | Wellhead valve rotating device applicable to narrow space for petroleum exploitation |
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| GR01 | Patent grant |