CN106272211A - A kind of intelligent spanner - Google Patents

A kind of intelligent spanner Download PDF

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Publication number
CN106272211A
CN106272211A CN201610841213.6A CN201610841213A CN106272211A CN 106272211 A CN106272211 A CN 106272211A CN 201610841213 A CN201610841213 A CN 201610841213A CN 106272211 A CN106272211 A CN 106272211A
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CN
China
Prior art keywords
sliding block
locking
pushing
locking sliding
pressing face
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.)
Granted
Application number
CN201610841213.6A
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Chinese (zh)
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CN106272211B (en
Inventor
俞江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIAKE ELECTRONICS CO Ltd ZHEJIANG
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JIAKE ELECTRONICS CO Ltd ZHEJIANG
Priority date (The priority date 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 date listed.)
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Application filed by JIAKE ELECTRONICS CO Ltd ZHEJIANG filed Critical JIAKE ELECTRONICS CO Ltd ZHEJIANG
Priority to CN201610841213.6A priority Critical patent/CN106272211B/en
Publication of CN106272211A publication Critical patent/CN106272211A/en
Application granted granted Critical
Publication of CN106272211B publication Critical patent/CN106272211B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/002Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

nullThe present invention provides a kind of intelligent spanner,Including handle、Housing、Drive mechanism and sleeve,Drive mechanism arranges in the housing and includes driving means and power transmission shaft,Power transmission shaft and sleeve connection,It is characterized in that: described sleeve includes locking plate and adjustable locking part,Adjustable locking part is arranged on locking plate,Described adjustable locking part includes some locking sliding blocks and the quantity connector equal with locking sliding block,Connector two ends connect with two groups of adjacent locking sliding blocks respectively,Locking sliding block includes the first pushing and pressing face and the second pushing and pressing face,The first pushing and pressing face between adjacent locking sliding block offsets with the second pushing and pressing face,And first pushing and pressing face can relative slide with the second pushing and pressing face,Surround between first pushing and pressing face of above-mentioned locking sliding block that openings of sizes is adjustable pulls mouth,Coordinate successively between described locking sliding block and make to pull interruption-forming regular polygon structure.Present configuration is simple, reasonable in design, and work efficiency is high, applied widely, it is possible to operate in small space.

Description

A kind of intelligent spanner
Technical field
The present invention relates to a kind of intelligent spanner, be a kind of electric tool.
Background technology
Automatization and commercial Application use, commonly uses the spanner that workpiece is applied power.But for corner, or front and back The place of the more operating difficulties of obstacle, owing to existing spanner volume is relatively big, is difficult to put into, and can only twist solid not coordination with fixed-direction Put the screw and nut with direction, it is impossible to use normally.Meanwhile, during using, owing to bolt part to be twisted is big Small dimension is different, needs often to change the sleeve adapted, and use is inconvenient for.
The improvement used spanner in the environment of narrow and small place on existing market is few, and structure is complicated mostly, Regulate constant.
Application No. 201320091872.4 discloses a kind of electric wrench, as it is shown in figure 1, include shell (1a), motor (2a), intermediate plate (3a), gear shaft (9a), driving gearshaft (4a), internal gear (10a), muff joint (8a), motor (2a) being positioned at the top of shell (1a), motor shaft is connected with gear shaft (9a), and intermediate plate (3a) is positioned at motor (2a) Lower section, intermediate plate (3a) is axially vertical with motor shaft, and driving gearshaft (4a) has two, lays respectively at gear shaft (9a) Both sides, the upper end of driving gearshaft (4a) is arranged on intermediate plate (3a) by bearing, gear shaft (9a) and two biographies Be respectively fixed with driving gear and travelling gear on movable gear shaft (4a), drive gear respectively with two driving gearshafts (4a) Travelling gear is meshed, and internal gear (10a) is positioned at the periphery of the travelling gear of two driving gearshafts (4a), internal gear (10a) Being meshed with travelling gear, internal gear (10a) connects as one with muff joint (8a).This apparatus structure is complicated, at narrow and small sky Between time, need to select specific sleeve, operation inconvenience, additionally for the bolt of different size, it is also desirable to change different size Sleeve, adaptive therewith, practicality is inconvenient for, and is also unfavorable for carrying.
Therefore, it is badly in need of providing a kind of energy quickly regulating sleeve size, the spanner that can use under small space.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency present in prior art, and a kind of reasonable in design be provided, Work efficiency is high, applied widely, it is possible to carry out the intelligent spanner operated in small space.
The present invention solves the problems referred to above and be the technical scheme is that this intelligent spanner, including handle, housing, transmission Mechanism and sleeve, drive mechanism arranges in the housing and includes a driving means and a transmission driven by driving means Axle, power transmission shaft and sleeve connection, it is characterised in that:
Described sleeve includes locking plate and adjustable locking part, and adjustable locking part is arranged on locking plate, described adjustable Formula locking member includes some locking sliding blocks and the quantity connector equal with locking sliding block, and connector two ends are respectively with adjacent two Group locking sliding block connects, and locking sliding block includes the first pushing and pressing face and the second pushing and pressing face, and first between adjacent locking sliding block pushes away Offset with the second pushing and pressing face to face, and can relative slide with the second pushing and pressing face in the first pushing and pressing face, the first of above-mentioned locking sliding block Surround the adjustable mouth of pulling of openings of sizes between pushing and pressing face, coordinate successively between described locking sliding block and make to pull interruption-forming regular polygon Structure.In the present invention, transmission mechanism control sleeve rotates, thus carries out the dismounting of bolt or screw, and compares manual spanner, more Adding laborsaving, work efficiency is higher;By regulating the position of locking sliding block, scalable pulls the size of mouth, thus with different size Bolt is adaptive, on probation wider;When pulling mouth regulation, control locking sliding block and move, thus regulate the of adjacent locking sliding block One pushing and pressing face and the position in the second pushing and pressing face, thus the size of mouth is pulled in regulation.
Offer chute on locking plate of the present invention, described locking sliding block has the raised line matched with chute, raised line Coordinating in chute and can move along chute, when one of which locking sliding block moves, remaining locking sliding block links, thus realizes pulling The regulation of mouth size.The quantity of chute is identical with locking sliding block, and chute limits the moving direction of locking sliding block so that locking is sliding Block displacement, it can thus be ensured that the shape pulling mouth is always regular polygon, due to the spacing relation between locking sliding block, adds The effect of chute, can realize the linkage between locking sliding block so that regulation acts in agreement.
Present invention additionally comprises universal driving device, be connected by universal driving device between described sleeve and power transmission shaft, institute Stating universal driving device and include first connecting rod, second connecting rod and regulation location structure, first connecting rod and second connecting rod are by universal Joint connects, and regulation location structure acts on first connecting rod and second connecting rod the angle between scalable first connecting rod and second connecting rod Degree.The setting of universal driving device, adjustable sleeve is relative to the angle of power transmission shaft, it is simple to work in narrow space, the most just In using at some special occasions.
Regulation location structure of the present invention includes adjusting rod, and described first connecting rod offers regulating tank, adjusting rod one End is articulated on second connecting rod, and the other end arranges the shackle member coordinated in regulating tank, and this shackle member can be slided by relative accommodation groove Being connected in regulating tank of dynamic formula.During regulation angle, the shackle member of control and regulation bar is mobile regulation in regulating tank, thus controls Angle between first connecting rod and second connecting rod.
Universal joint of the present invention uses rzeppa joint, weiss universal joint or free three pivot universal joints.
Present invention additionally comprises regulation ring and least one set motion bar, motion bar is connected with locking sliding block, and regulation ring is with movable Bar connects, and regulates turnable being connected on locking plate of ring, and locking sliding block can do when regulation ring rotates push or pull on dynamic Make.When rotating regulation ring, motion bar can be pushed or pull on, and motion bar acts on locking sliding block, make locking sliding block move accordingly Dynamic, thus a mouthful size is pulled in regulation, is adjusted by regulation ring, its operation is more convenient.
Having the through hole of regular polygon on locking plate of the present invention, the limit number of this regular polygon is with to pull mouth identical, described Adjustable locking part is at least partially housed in this through hole, and locking sliding block has tangent tangent of the inwall corresponding with through hole Face.Through hole can limit the movement of locking sliding block further, and the inwall particular by through hole takes spacing phase tangent plane, makes locking sliding block Move within the specific limits.
Of the present invention pull mouth be shaped as regular hexagon.
Present invention additionally comprises control device, described control device is connected with driving means and universal driving device respectively.
The using method of a kind of intelligent spanner, it is characterised in that comprise the steps:
1) according to bolt part size rotating adjustment ring to be twisted, a mouthful size of pulling for adjustable locking part is made to adapt with it;
2) by controlling device regulation universal driving device, sleeve is made to reach required angle of bend;
3) required torque is set by control device;
4) this device is started by control device.
The present invention compared with prior art, has the following advantages and effect: 1, simple in construction, reasonable in design;2, hands is compared Dynamic spanner, more laborsaving, work efficiency is higher;3, by regulating the position of locking sliding block, scalable pulls the size of mouth, thus Adaptive with the bolt of different size, on probation wider;4, chute limits the moving direction of locking sliding block so that locking sliding block Displacement, it can thus be ensured that the shape pulling mouth is always regular polygon, due to the spacing relation between locking sliding block, adds cunning The effect of groove, can realize the linkage between locking sliding block so that regulation acts in agreement;The setting of 5 universal driving devices, scalable Sleeve is relative to the angle of power transmission shaft, it is simple to work in narrow space, also allows for using at some special occasions.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the intelligent spanner in the embodiment of the present invention.
Fig. 2 is the structural representation of universal driving device.
Fig. 3 is the main TV structure schematic diagram of sleeve.
Fig. 4 is the structural representation of adjustable locking part.
Fig. 5 is to control device, driving means and the cooperation schematic diagram of universal driving device.
Fig. 6 is the left view structural representation of Fig. 3.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following example are to this Bright explanation and the invention is not limited in following example.
Embodiment 1.
Seeing Fig. 1 to Fig. 5, the intelligent spanner of the present embodiment includes handle 1, housing 2, drive mechanism and sleeve 7, transmission Mechanism is arranged in housing 2 and includes a driving means 3 and a power transmission shaft driven by driving means 34, power transmission shaft 4 with Sleeve 7 connects, and during work, sleeve 7 mates with bolt, and controls drive mechanism startup, thus realizes automatic tightening or dismounting.
As shown in Figure 3 and Figure 4, the sleeve 7 in the present embodiment includes locking plate 71 and adjustable locking part 70, adjustable lock Tight part 70 is arranged on locking plate 71, and adjustable locking part 70 includes that some locking sliding blocks 73 and quantity are equal with locking sliding block 73 Connector 74, connector 74 two ends connect with two groups of adjacent locking sliding blocks 73 respectively, and specifically, connector 74 two ends are respectively Hinged with two groups of adjacent locking sliding blocks 73, cooperatively form ring-type between locking sliding block 73 successively, locking sliding block 73 includes first Pushing and pressing face 731 and the second pushing and pressing face 732, the first pushing and pressing face 731 between adjacent locking sliding block 73 and the second pushing and pressing face 732 phase Supporting and tangent, and can relative slide with the second pushing and pressing face 732 in the first pushing and pressing face 731, two groups of the most adjacent locking sliding blocks 73 can phase To slip, between the first pushing and pressing face 731 of above-mentioned locking sliding block 73, surround that openings of sizes is adjustable pulls mouth 730, locking sliding block Coordinating successively between 73 and make to pull mouth 730 and form regular polygon structure, pulling mouth 730 is by the second pushing and pressing of above-mentioned locking sliding block Face 732 surrounds, and regulation the first pushing and pressing face 731 and the position relationship in the second pushing and pressing face 732, i.e. scalable pulls the size of mouth 730.
In the present embodiment, transmission mechanism control sleeve 7 rotates, thus carries out the dismounting of bolt or screw, and compares manual Spanner, more laborsaving, work efficiency is higher;By regulating the position of locking sliding block 73, scalable pulls the size of mouth 730, thus Adaptive with the bolt of different size, on probation wider;Pull mouth 730 when regulating, control locking sliding block 73 and move, thus regulate phase First pushing and pressing face 731 and the position in the second pushing and pressing face 732 of adjacent locking sliding block 73, thus the size of mouth 730 is pulled in regulation, it is not necessary to The sleeve of adaptation changed by bolt according to different size.
Offer chute 711 on locking plate 71 in the present embodiment, locking sliding block 73 has convex with what chute 711 matched Bar 733, raised line 733 coordinates in chute 711 and can move along chute 711, when one of which locking sliding block 73 moves, remaining lock Tight slide block 73 links, thus realizes pulling the regulation of mouth 730 size.The quantity of chute 711 is identical with locking sliding block 73, chute 711 Limit the moving direction of locking sliding block 73 so that locking sliding block 73 displacement, it can thus be ensured that pull the shape of mouth 730 all the time For regular polygon, due to the spacing relation between locking sliding block 73, add the effect of upper hopper chute 711, can realize locking sliding block 73 it Between linkage so that regulation act in agreement.
As in figure 2 it is shown, the present embodiment also includes universal driving device 5, between sleeve 7 and power transmission shaft 4, pass through Universal drive Device 5 connects, and universal driving device 5 includes first connecting rod 52, second connecting rod 53 and regulation location structure, first connecting rod 52 and the Two connecting rods 53 are connected by universal joint, and regulation location structure acts on first connecting rod 52 and second connecting rod 53 and scalable first connects Angle between bar 52 and second connecting rod 53.The setting of universal driving device 5, the angle of the relative power transmission shaft 4 of adjustable sleeve 7, It is easy to work in narrow space, also allows for using at some special occasions.
Regulation location structure in the present embodiment includes adjusting rod 55, and first connecting rod 52 offers regulating tank 51, regulation Bar 55 one end is articulated on second connecting rod 53, and the other end arranges the shackle member 54 coordinated in regulating tank 51, this shackle member 54 Can being connected in regulating tank 51 of relative accommodation groove 51 slidingtype.During regulation angle, the shackle member 54 of control and regulation bar 55 is being adjusted Mobile regulation in joint groove 51, thus control the angle between first connecting rod 52 and second connecting rod 53.Adjusting rod 55 and second connecting rod The pivot joint of 53 is realized by bolt or rotating shaft.
Universal joint in the present embodiment uses rzeppa joint, weiss universal joint or free three pivot universal joints.On Stating universal joint and be prior art, here is omitted.
The present embodiment also includes regulating ring 75 and least one set motion bar 76, and motion bar 76 is connected with locking sliding block 73, adjusts Joint ring 75 is connected with motion bar 76, regulates turnable being connected on locking plate 71 of ring 75, and can be right when regulation ring 75 rotates Locking sliding block 73 does the action pushed or pulled on.When rotating regulation ring 75, motion bar 76 can be pushed or pull on, and motion bar 76 acts on Locking sliding block 73, makes locking sliding block 73 move accordingly, thus mouth 730 size is pulled in regulation, is adjusted by regulation ring 75, its Operate more convenient.Motion bar 76 one end is axially extending along sleeve 7 and passes through chute 711, thus is connected with regulation ring 75.Regulation The connection of ring 75 and locking plate 71 is specifically, have the draw-in groove of L-type on locking plate 71, and regulates ring 75 one end and be stuck in draw-in groove, Thus can realize regulating the rotation of ring 75, it implements structure is prior art, and here is omitted, additionally may be used without existing Other structure in technology is had to realize regulating the rotation regulation of ring 71.
There is the through hole 712 of regular polygon, the limit number of the regular polygon of this through hole 712 on locking plate 71 in the present embodiment Mouth 730 is identical with pulling, and adjustable locking part 70 is at least partially housed in this through hole 712 on the axial direction of sleeve 7, and lock Tight slide block 73 has the phase tangent plane 734 that the inwall corresponding with through hole 712 is tangent.Through hole 712 can limit locking sliding block further The movement of 73, the inwall particular by through hole 712 takes spacing phase tangent plane 734, makes locking sliding block 73 move within the specific limits.
In the present embodiment pull mouth 730 be shaped as regular hexagon.
As it is shown in figure 5, the present embodiment also include control device 10, control device 10 respectively with driving means 3 and universal biography Dynamic device 5 connects.Control device 10 controls driving means 3 and works, it is possible to controls universal driving device 5 connection and automatically adjusts Joint.Control device and include display device 8, for series of parameters and the state of universal driving device 5 of display control unit 10, And touch control can be carried out.
Driving means 3 in the present embodiment is for driving motor, oil cylinder or cylinder.
Embodiment 2.
The using method of the intelligent spanner in the present embodiment, uses the intelligent spanner in embodiment 1, including walking as follows Rapid:
1) according to bolt part size rotating adjustment ring 75 to be twisted, make adjustable locking part 70 pull mouth 730 size and its Adapt;
2) regulate universal driving device 5 by control device 10, make sleeve 7 reach required angle of bend;
3) required torque is set by control device 10;
4) this device is started by control device 10.
Above content described in this specification is only illustration made for the present invention.Technology belonging to the present invention Described specific embodiment can be made various amendment or supplements or use similar mode by the technical staff in field Substitute, without departing from the content of description of the invention or surmount scope defined in the claims, all should be belonged to this The protection domain of invention.

Claims (10)

1. an intelligent spanner, including handle, housing, drive mechanism and sleeve, drive mechanism arranges in the housing and includes One driving means and a power transmission shaft driven by driving means, power transmission shaft and sleeve connection, it is characterised in that:
Described sleeve includes locking plate and adjustable locking part, and adjustable locking part is arranged on locking plate, described adjustable lock Tight part includes some locking sliding blocks and the quantity connector equal with locking sliding block, connector two ends respectively with two groups of adjacent locks Tight slide block connects, and locking sliding block includes the first pushing and pressing face and the second pushing and pressing face, the first pushing and pressing face between adjacent locking sliding block Offset with the second pushing and pressing face, and can relative slide with the second pushing and pressing face in the first pushing and pressing face, the first pushing and pressing of above-mentioned locking sliding block Surround the adjustable mouth of pulling of openings of sizes between face, coordinate successively between described locking sliding block and make to pull interruption-forming regular polygon knot Structure.
Intelligent spanner the most according to claim 1, it is characterised in that: offer chute, described lock on described locking plate Having, on tight slide block, the raised line matched with chute, raised line coordinates in chute and can move along chute, one of which locking sliding block Time mobile, remaining locking sliding block links, thus realizes pulling the regulation of mouthful size.
Intelligent spanner the most according to claim 1 and 2, it is characterised in that: also include universal driving device, described sleeve Being connected by universal driving device with between power transmission shaft, described universal driving device includes first connecting rod, second connecting rod and regulation Location structure, first connecting rod is connected by universal joint with second connecting rod, and regulation location structure acts on first connecting rod and second even Bar the angle between scalable first connecting rod and second connecting rod.
Intelligent spanner the most according to claim 3, it is characterised in that: described regulation location structure includes adjusting rod, institute Stating and offer regulating tank on first connecting rod, adjusting rod one end is articulated on second connecting rod, and the other end arranges cooperation at regulating tank In shackle member, this shackle member can being connected in regulating tank of relative accommodation groove slidingtype.
Intelligent spanner the most according to claim 3, it is characterised in that: described universal joint uses rzeppa joint, ball Fork-type universal-joint or freely three pivot universal joints.
Intelligent spanner the most according to claim 1, it is characterised in that: also include regulating ring and least one set motion bar, Motion bar is connected with locking sliding block, and regulation ring is connected with motion bar, regulates turnable being connected on locking plate of ring, and regulation Locking sliding block can be done, when rotating, the action pushed or pulled on by ring.
Intelligent spanner the most according to claim 1 and 2, it is characterised in that: on described locking plate, there is regular polygon Through hole, the limit number of this regular polygon is with to pull mouth identical, and described adjustable locking part is at least partially housed in this through hole, and locking Slide block has the phase tangent plane that the inwall corresponding with through hole is tangent.
Intelligent spanner the most according to claim 1, it is characterised in that pulls mouth described in: is shaped as regular hexagon.
Intelligent spanner the most according to claim 3, it is characterised in that: also including controlling device, described control device divides It is not connected with driving means and universal driving device.
10. the using method of an intelligent spanner, it is characterised in that comprise the steps:
1) according to bolt part size rotating adjustment ring to be twisted, a mouthful size of pulling for adjustable locking part is made to adapt with it;
2) by controlling device regulation universal driving device, sleeve is made to reach required angle of bend;
3) required torque is set by control device;
4) this device is started by control device.
CN201610841213.6A 2016-09-22 2016-09-22 A kind of intelligent spanner Active CN106272211B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN106272211B CN106272211B (en) 2018-10-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110949138A (en) * 2019-12-19 2020-04-03 嘉兴智行物联网技术有限公司 Solar thin film power generation equipment for two-wheeled vehicle and use method thereof
CN113288398A (en) * 2021-05-25 2021-08-24 中国人民解放军空军特色医学中心 Lumbar vertebra turning device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448931A (en) * 1989-07-28 1995-09-12 Great Bay Tool Corp. Adjustable wrench
CN101288949A (en) * 2008-06-11 2008-10-22 曹莹莹 Labour-saving spanner
CN202528099U (en) * 2012-03-31 2012-11-14 罗小松 Adjusting wrench
CN103659704A (en) * 2013-11-21 2014-03-26 南通高盛机械制造有限公司 Multifunctional torque wrench

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448931A (en) * 1989-07-28 1995-09-12 Great Bay Tool Corp. Adjustable wrench
CN101288949A (en) * 2008-06-11 2008-10-22 曹莹莹 Labour-saving spanner
CN202528099U (en) * 2012-03-31 2012-11-14 罗小松 Adjusting wrench
CN103659704A (en) * 2013-11-21 2014-03-26 南通高盛机械制造有限公司 Multifunctional torque wrench

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110949138A (en) * 2019-12-19 2020-04-03 嘉兴智行物联网技术有限公司 Solar thin film power generation equipment for two-wheeled vehicle and use method thereof
CN113288398A (en) * 2021-05-25 2021-08-24 中国人民解放军空军特色医学中心 Lumbar vertebra turning device

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