CN114536262A - Electric torque wrench - Google Patents
Electric torque wrench Download PDFInfo
- Publication number
- CN114536262A CN114536262A CN202210315125.8A CN202210315125A CN114536262A CN 114536262 A CN114536262 A CN 114536262A CN 202210315125 A CN202210315125 A CN 202210315125A CN 114536262 A CN114536262 A CN 114536262A
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- China
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- connecting block
- arm
- extension
- torque wrench
- extension arm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0078—Reaction arms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses an electric torque wrench, wherein a reaction arm connected to a wrench body is arranged into a connecting installation section, a middle section and a plurality of extension arms; be provided with the connecting block on interlude and the extension arm respectively, and be equipped with the spread groove that corresponds on the extension arm, the groove depth of spread groove sets up to the thickness that is less than the extension arm. The adjustment of the whole length of the counter force arm can be realized through the connection of a plurality of extension arms, so that application scenes with different length requirements can be met; the part of the thickness of each extension arm exceeding the groove depth of the connecting groove is utilized, the plurality of extension arms are respectively connected to the upper end surface and/or the lower end surface of the corresponding connecting block, and the height of the extension arm positioned at the tail end relative to the middle section or the wrench body can be controlled; thereby make the adaptable different distances and the difference in height between waiting to twist the bolt and the adjacent bolt of electric torque wrench of this embodiment, greatly increased applicable scene, it is few to have solved the counter force arm application scene of current electric torque wrench and adaptation, is difficult to satisfy the problem of actual demand.
Description
Technical Field
The invention belongs to the technical field of wrenches, and particularly relates to an electric torque wrench.
Background
An electric constant torque wrench is generally used in a place where a bolt (nut) is mounted and dismounted with a large torque ratio and where a torque accuracy requirement is high. The existing electric torque wrench usually controls a torque value by an intelligent controller according to the working current value change of a motor in the bolt tightening process, and when the torque value reaches a preset value, the motor stops working to realize the required torque value. The electric torque wrench mainly comprises a mechanical part consisting of a reduction gearbox, a reaction arm, a sleeve, an internal shaft, a gear and the like, an electromechanical part consisting of a machine body, a handle, a switch, a cable sheath, a driving motor and the like, and an electronic intelligent part consisting of an intelligent controller.
When the electric torque wrench works, the sleeve sleeves a bolt which needs to be loosened or tightened, the reaction arm is supported on the adjacent bolt, the switch is pressed to drive the motor to rotate, the sleeve is driven to rotate clockwise or anticlockwise through the transmission of the mechanical part, and the loosening or tightening of the bolt is realized under the action of the reaction arm and the supporting point.
When the whole machine leaves a factory, a conventional counter-force arm is arranged. However, the reaction arm often has a problem of insufficient length or too long length, or a situation that the abutting support cannot be realized due to the fact that the height of the tail end of the reaction arm is not matched with the adjacent bolt exists, and the application scenarios are few, and the practical use requirements of construction are difficult to meet.
Disclosure of Invention
The invention aims to provide an electric torque wrench, and aims to solve the problems that the existing electric torque wrench and adaptive reaction arm are few in application scenes and difficult to meet actual requirements.
In order to solve the problems, the technical scheme of the invention is as follows:
the invention provides an electric torque wrench, comprising:
the wrench body is used for rotating an external bolt to be screwed;
the reaction arm comprises an installation section, a middle section and a plurality of extension arms;
the mounting section is provided with a connecting structure connected to the wrench body;
the first end of the middle section is connected to the mounting section, and the second end of the middle section is provided with a connecting block;
a connecting groove used for detachably connecting the connecting block is formed in the first end of the extension arm, and the connecting block is matched with the connecting groove in shape;
the second end of the extension arm is provided with the connecting block which is used for abutting against an external adjacent bolt or being detachably connected with the adjacent extension arm; each extension arm is respectively installed on the upper end surface or the lower end surface of the corresponding connecting block through the connecting groove;
wherein the depth of the connecting groove is less than the thickness of the extension arm;
under the connection state, the extension arms are respectively installed on the upper end surface or the lower end surface corresponding to the connection blocks so as to change the height difference of the extension arms at the tail ends relative to the wrench body.
According to the electric torque wrench, at least one group of corresponding connecting holes are formed in the inner wall surfaces of the connecting block and the connecting groove, and the connecting block and the connecting groove are detachably connected by penetrating through the connecting holes through the fastening bolts.
According to the electric torque wrench, the connecting blocks are of symmetrical structures on two sides of a vertical plane in which the reaction arm extends.
According to the electric torque wrench, the connecting block is in the shape of an isosceles polygon, and the height of the isosceles polygon is the extension direction of the reaction arm;
the connecting groove is an isosceles polygonal groove corresponding to the connecting block.
According to the electric torque wrench, the depth of the connecting groove is half of the thickness of the extending arm.
According to the electric torque wrench, the mounting section, the middle section and the connecting block positioned at the second end of the middle section are integrally formed; the extension arm and the corresponding connecting block are integrally formed.
According to the electric torque wrench, the hollow-out weight-reducing structure is arranged on the extension arm.
According to the electric torque wrench, the connecting structure is the mounting ring, and the inner wall surface of the mounting ring is provided with the mounting hole used for being mounted to the wrench body.
The invention relates to an electric torque wrench, wherein a wrench body comprises an electric host, a reaction arm seat and a sleeve;
the counterforce arm seat is arranged at the fixed end of the electric host and is used for connecting the connecting structure; the sleeve is arranged at the output end of the electric host.
According to the electric torque wrench, when the heights between the external adjacent bolt and the external bolt to be screwed are the same and the length of the connecting block at the second end of the middle section is insufficient, the plurality of extension arms are sequentially overlapped up and down at the middle section, and each connecting groove is sequentially covered and connected to the upper surface and the lower surface of the corresponding connecting block until the extension arm at the tail end abuts against the external adjacent bolt;
when the external adjacent bolt is higher than the external bolt to be screwed and the length of the connecting block at the second end of the middle section is not enough, sequentially and upwardly superposing a plurality of extension arms at the middle section, wherein each connecting groove is respectively covered and connected to the upper surface of the corresponding connecting block until the extension arm at the tail end abuts against the external adjacent bolt;
when the external adjacent bolt is lower than the external bolt to be screwed and the length of the connecting block at the second end of the middle section is insufficient, the plurality of extension arms are sequentially and downwards overlapped at the middle section, and each connecting groove is respectively attached and connected to the lower surface of the corresponding connecting block until the tail end of each extension arm abuts against the external adjacent bolt.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
according to one embodiment of the invention, the reaction arm connected to the wrench body is arranged into the connected installation section, the middle section and the plurality of extension arms; wherein, be provided with the connecting block on interlude and the extension arm respectively, and be equipped with the spread groove that corresponds on the extension arm, the groove depth of spread groove sets up to the thickness that is less than the extension arm, and extension arm accessible spread groove installation to the up end or the lower terminal surface that correspond the connecting block. The adjustment of the whole length of the reaction arm can be realized through the connection of a plurality of extension arms, so that application scenes with different length requirements can be met; meanwhile, the part of the extension arm with the thickness exceeding the groove depth of the connecting groove is respectively connected to the upper end surface or the lower end surface of the corresponding connecting block or respectively connected to the upper end surface and the lower end surface of the connecting block by the plurality of extension arms, so that the height of the extension arm positioned at the tail end relative to the middle section or the wrench body can be controlled to adapt to the height difference of the adjacent bolt relative to the bolt to be screwed; thereby make the adaptable different distances and the different difference in height between waiting to twist bolt and the adjacent bolt of electric torque wrench of this embodiment, greatly increased applicable scene, it is few to have solved the counter force arm application scene of current electric torque wrench and adaptation, is difficult to satisfy the problem of actual demand.
Drawings
FIG. 1 is a schematic view of an electric torque wrench of the present invention;
FIG. 2 is another schematic view of the electric torque wrench of the present invention;
FIG. 3 is a schematic view of an embodiment of the reaction arm of the electric torque wrench according to the present invention;
FIG. 4 is a cross-sectional view of one embodiment of a reaction arm of the electric torque wrench of the present invention;
FIG. 5 is a schematic view of another embodiment of the reaction arm of the electric torque wrench according to the present invention;
FIG. 6 is a schematic view of another embodiment of the reaction arm of the electric torque wrench according to the present invention;
fig. 7 is a sectional view of a connection portion of a connection block and an extension arm of the electric torque wrench of the present invention.
Description of reference numerals: 1: a wrench body; 2: a sleeve; 3: an installation section; 301: mounting holes; 4: a middle section; 5: an extension arm; 501: a hollow weight reduction structure; 6: a bolt is to be screwed; 7: adjacent bolts; 8: connecting blocks; 9: fastening a bolt; 10: connecting grooves; 11: and (4) connecting the holes.
Detailed Description
An electric torque wrench according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1 and 2, in one embodiment, an electric torque wrench includes a wrench body 1 for turning an external bolt 6 to be turned and a reaction arm.
The counter force arm may in particular comprise a mounting section 3, an intermediate section 4 and a number of extension arms 5. The mounting section 3 is provided with a connecting structure connected to the wrench body 1. The first end of interlude 4 is connected in installation section 3, and the second end of interlude 4 is equipped with a connecting block 8.
The first end of the extension arm 5 is provided with a connecting groove 10 for detachably connecting the connecting block 8, and the connecting block 8 is matched with the connecting groove 10 in shape. The second end of the extension arm 5 is provided with a connection block 8 for abutting against an externally abutting bolt 7 or being detachably connected to an adjacent extension arm 5. Each extension arm 5 is respectively installed on the upper end surface or the lower end surface of the corresponding connecting block 8 through a connecting groove 10. Wherein the depth of the connecting groove 10 is less than the thickness of the extension arm 5.
Under the connection state, extension arm 5 installs respectively to the up end or the terminal surface down that corresponds connecting block 8 to change the difference in height of extension arm 5 for spanner body 1 of keeping away from spanner body 1 one side end.
This embodiment sets up the reaction arm of connecting on spanner body 1 to installation section 3, interlude 4 and several extension arms 5 that link to each other. Wherein, be provided with connecting block 8 on interlude 4 and the extension arm 5 respectively, and be equipped with corresponding spread groove 10 on the extension arm 5, the groove depth of spread groove 10 sets up to the thickness that is less than extension arm 5, and 5 accessible spread grooves 10 of extension arm install to the up end or the lower terminal surface that correspond connecting block 8.
In practical application, when the maximum extension end of the counterforce arm and the adjacent nut lack the required length, the practical use requirement of construction cannot be met; when the length of the main force arm of the reaction arm exceeds the surplus length of the actual space, the surplus length (without touching the inner side wall of the structural part) needs to be cut off to meet the use condition, and the problems are that the distribution of the distances of all bolts is large in field construction, the main force arms with various lengths and specifications need to be matched, and the defects of high use cost, heavy accumulated weight, troublesome carrying, inconvenient management and the like are caused. And this embodiment can realize the regulation of the whole length of reaction arm through the connection of a plurality of extension arms 5 for can satisfy the application scene of different length demands, only need carry a plurality of extension arms 5 can.
Similarly, in practical application, when the bolt 6 to be screwed and the adjacent bolt 7 are not on the same plane, the existing reaction arm often cannot meet the actual use requirement of construction, or the existing reaction arm needs to carry various specifications of special-shaped reaction arms to meet different height difference requirements, which also causes the disadvantages of high use cost, heavy accumulated weight, troublesome carrying, inconvenient management and the like. The present embodiment utilizes the portion of the extension arm 5 whose thickness exceeds the groove depth of the connection groove 10, and is respectively connected to the upper end surface or the lower end surface of the corresponding connection block 8 through a plurality of extension arms 5, or is respectively connected to the upper end surface and the lower end surface of the connection block 8, so that the height of the extension arm 5 located at the tail end relative to the middle section 4 or the wrench body 1 can be controlled to adapt to the height difference of the adjacent bolt 7 relative to the bolt 6 to be screwed. Therefore, the electric torque wrench of the embodiment can adapt to different distances and different height differences between the to-be-screwed bolt 6 and the adjacent bolt 7, the applicable scenes are greatly increased, and the problems that the existing electric torque wrench and the adaptive counter force arm are few in application scenes and difficult to meet actual requirements are solved.
Referring to fig. 1 to 7, the specific structure of the torque handle of the present embodiment is further described below:
as shown in fig. 2, in the present embodiment, the mounting section 3, the intermediate section 4 and the connecting block 8 may form a Z-shaped bent structure, so that the height of the connecting block 8 matches the height of the socket 2 on the electric torque wrench.
As shown in fig. 7, in this embodiment, by providing the connecting block 8 and the connecting groove 10 which are matched, a torque transmission structure is formed in a matching manner, that is, the outer side wall of the connecting block 8 and the inner side wall of the connecting groove 10 are attached to each other to fix the relative positions therebetween, so as to form a stable connection structure, and the torque transmission structure can transmit the radial torque reliably and can bear the transmission of the force. Wherein, connecting block 8 and connecting groove 10 can set up to clearance fit or transition fit to can ensure that can stably transmit radial moment of torsion between connecting block 8 and the connecting groove 10, also can ensure its easy installation and dismantlement.
Furthermore, at least one group of corresponding connecting holes 11 are formed in the inner wall surfaces of the connecting block 8 and the connecting groove 10, and the connecting block 8 and the connecting groove 10 are detachably connected through the connecting holes 11 through fastening bolts 9. In this embodiment, two sets of corresponding connection holes 11 are specifically adopted, and the fixed connection between one extension arm 5 and the corresponding connection block 8 is realized through two fastening bolts 9, and in other embodiments, the number of the extension arms can be determined according to specific requirements, which is not specifically limited herein.
Preferably, the arrangement direction of the plurality of sets of connecting holes 11 is preferably the extending direction of the whole reaction arm, so that the fixing between the connecting block 8 and the extending arm 5 is more stable.
In this embodiment, the connection block 8 may be arranged in a bilaterally symmetrical configuration along the vertical plane in which the reaction arm extends. And the shape of the connecting groove 10 is also matched with the connecting block 8, so that no matter the extension arm 5 is installed on the upper end surface or the lower end surface of the connecting block 8, the extension directions are the same, and the integral extension directions of the extension arm 5 are positioned on the same straight line.
Further, the shape of the connecting block 8 may be an isosceles polygon, and the height of the isosceles polygon is the extending direction of the reaction arm. The connecting groove 10 may also be an isosceles polygonal groove corresponding to the connecting block 8.
In particular, the connecting block 8 may be an isosceles trapezoid, i.e. an isosceles trapezoid, the long side of which is connected to the second end of the middle section 4, and the short side of which is used to be inserted into the corresponding connecting groove 10.
And the shape of spread groove 10 also is isosceles trapezoid, an isosceles trapezoid groove promptly, and the long limit in isosceles trapezoid groove is located the terminal surface department of 5 first ends of extension arm promptly to establish into hollow out construction, can follow the terminal surface disect insertion isosceles trapezoid inslot of 5 first ends of extension arm.
In this embodiment, the depth of the coupling groove 10 is half the thickness of the extension arm 5. Thereby make when the height of required terminal connection arm and the height of the second end of interlude 4 the same, through setting up the even number extension arm 5, half is connected to the up end that corresponds connecting block 8, and half is connected to the lower terminal surface that corresponds connecting block 8 and can realize, the more combination between the extension piece of being convenient for.
Of course, in other embodiments, the depth of the connecting groove 10 can be set to be one third of the thickness of the extending arm 5 or other values according to the requirement, and is not limited in detail herein.
For example, as shown in fig. 3, two extension arms 5 may be provided to be respectively installed at the upper end surface and the lower end surface of the corresponding connection block 8, so that the height of the distal extension arm 5 does not change. As shown in fig. 5, two extension arms 5 are provided and installed on the upper end surface of the corresponding connection block 8, and since the groove depth of the connection groove 10 is half of the thickness of the extension arm 5, the height of the end extension arm 5 relative to the second end of the middle section 4 is increased by the thickness of one extension arm 5. As shown in fig. 6, two extension arms 5 can be provided and are installed on the lower end surface of the corresponding connection block 8, and since the groove depth of the connection groove 10 is half of the thickness of the extension arm 5, the height of the end extension arm 5 relative to the second end of the middle section 4 is reduced by the thickness of one extension arm 5.
In this embodiment, the mounting section 3, the intermediate section 4 and the connecting piece 8 at the second end of the intermediate section 4 may be provided as an integral part. The extension arm 5 and the corresponding connecting piece 8 can likewise be designed as one piece.
Further, under the condition of keeping the mechanical property of extension arm 5, can set up fretwork on extension arm 5 and subtract heavy structure 501 to make the weight of extension arm 5 reduce, portable more. Specifically, the periphery of the coupling hole 11 provided on the extension arm 5 may be opened, and the extension arm 5 is located at the rear portion of the coupling groove 10.
In this embodiment, the connection structure is a mounting ring, a mounting hole 301 for mounting to the wrench body 1 is formed on an inner wall surface of the mounting ring, and the connection with the wrench body 1 can be realized through a spline in the mounting hole 301.
In this embodiment, the wrench body 1 may include an electric motor, a reaction arm base, a socket 2, a torque adjusting module, and the like. The reaction arm base is provided at the fixed end of the motor-driven main unit and is used for being splined to the mounting hole 301. The sleeve 2 is arranged at the output end of the electric host and is used for being sleeved on the bolt 6 to be screwed to screw or unscrew the bolt. The torque adjusting module is arranged on the electric host machine and used for adjusting the output torque of the sleeve 2.
The following describes a specific application of the electric torque wrench of the present embodiment:
at current practical application scene, for example quartering hammer installation scene, wait to twist the bolt and adjoin the interval between the bolt great, and not all on the coplanar, the counter force arm length that conventional electric torque wrench joined in marriage is shorter, and a sleeve pipe is established through the cover on conventional counter force arm to current mode, and fixed connection between sleeve pipe and the conventional counter force arm is realized to the mode of rethread drilling cooperation bolt, and rethread sleeve pipe goes to butt and adjoins the bolt. And this connection does not match the situation where the two bolts are not in the same plane. Further, a scenario in which two bolts are spaced apart from each other more widely or have different heights often occurs in the assembly stage of the vehicle chassis, the engine block, or the electric drive assembly.
The reaction arm adopted by the electric torque wrench of the embodiment comprises the installation section 3, the middle section 4 and the extension arms 5, the length of the reaction arm can be changed by overlapping the extension arms 5, and the height of the reaction arm relative to the bolt to be screwed can also be changed. For example, when the length is short, the extension can be performed by sequentially stacking a plurality of extension arms 5 up and down; and when length and height all can't satisfy, accessible a plurality of extension arms 5 upwards superpose in proper order or the mode of superpose downwards, obtain the change of length and height simultaneously, the scene of adaptation is more wider.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (10)
1. An electric torque wrench, comprising:
the wrench body is used for rotating an external bolt to be screwed;
the reaction arm comprises an installation section, a middle section and a plurality of extension arms;
the mounting section is provided with a connecting structure connected to the wrench body;
the first end of the middle section is connected to the mounting section, and the second end of the middle section is provided with a connecting block;
a connecting groove used for detachably connecting the connecting block is formed in the first end of the extension arm, and the connecting block is matched with the connecting groove in shape; the second end of the extension arm is provided with the connecting block which is used for abutting against an external adjacent bolt or being detachably connected with the adjacent extension arm;
each extension arm is respectively installed on the upper end surface or the lower end surface of the corresponding connecting block through the connecting groove;
wherein the depth of the connecting groove is less than the thickness of the extension arm;
under the connection state, the extension arms are respectively installed on the upper end surface or the lower end surface corresponding to the connection blocks so as to change the height difference of the extension arms at the tail ends relative to the wrench body.
2. The electric torque wrench as claimed in claim 1, wherein at least one set of corresponding connection holes are formed in the inner wall surfaces of the connection block and the connection groove, and the connection block and the connection groove are detachably connected by passing a fastening bolt through the connection holes.
3. The electric torque wrench as claimed in claim 1, wherein the connecting block is a bilaterally symmetrical structure along a vertical plane in which the reaction arm extends.
4. The electric torque wrench as claimed in claim 3, wherein the connecting block is shaped as an isosceles polygon, and the height of the isosceles polygon is the extending direction of the reaction arm;
the connecting groove is an isosceles polygonal groove corresponding to the connecting block.
5. The electric torque wrench of claim 1, wherein the attachment slot is half as deep as the extension arm.
6. The electric torque wrench of claim 1, wherein the mounting section, intermediate section, and the connecting block at the second end of the intermediate section are integrally formed; the extension arm and the corresponding connecting block are integrally formed.
7. The electric torque wrench of claim 1, wherein the extension arm includes a hollowed-out weight-reducing structure.
8. The electric torque wrench of claim 1, wherein the connecting structure is a mounting ring having a mounting hole on an inner wall surface for mounting to the wrench body.
9. The electric torque wrench of claim 1, wherein the wrench body includes an electric motor, a reaction arm mount, and a socket;
the counterforce arm seat is arranged at the fixed end of the electric host and is used for connecting the connecting structure; the sleeve is arranged at the output end of the electric host.
10. The electric torque wrench as claimed in claim 1, wherein when the height between the external adjacent bolt and the external bolt to be screwed is the same and the length of the connecting block at the second end of the middle section is insufficient, by sequentially stacking up and down the plurality of extension arms at the middle section, each of the connecting grooves is sequentially covered and connected to the upper surface and the lower surface of the corresponding connecting block until the extension arm at the end abuts against the external adjacent bolt;
when the external adjacent bolt is higher than the external bolt to be screwed and the length of the connecting block at the second end of the middle section is not enough, sequentially and upwardly superposing a plurality of extension arms at the middle section, wherein each connecting groove is respectively covered and connected to the upper surface of the corresponding connecting block until the extension arm at the tail end abuts against the external adjacent bolt;
when the external adjacent bolt is lower than the external bolt to be screwed and the length of the connecting block at the second end of the middle section is insufficient, the plurality of extension arms are sequentially and downwards overlapped at the middle section, and each connecting groove is respectively attached and connected to the lower surface of the corresponding connecting block until the tail end of each extension arm abuts against the external adjacent bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210315125.8A CN114536262B (en) | 2022-03-29 | 2022-03-29 | Electric torque wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210315125.8A CN114536262B (en) | 2022-03-29 | 2022-03-29 | Electric torque wrench |
Publications (2)
| Publication Number | Publication Date |
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| CN114536262A true CN114536262A (en) | 2022-05-27 |
| CN114536262B CN114536262B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210315125.8A Active CN114536262B (en) | 2022-03-29 | 2022-03-29 | Electric torque wrench |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107457736A (en) * | 2016-06-03 | 2017-12-12 | 德州德劲液压动力有限公司 | A kind of Optimization-type hydraulic torque wrench |
| CN207578284U (en) * | 2017-11-15 | 2018-07-06 | 山东汉普机械工业有限公司 | A kind of automobile tire counter-force arm |
| US20180193988A1 (en) * | 2015-08-26 | 2018-07-12 | Redback Pneumatics Pty Ltd | Rotational driver |
| CN209919764U (en) * | 2019-04-25 | 2020-01-10 | 上海臻友设备工程技术有限公司 | Hydraulic wrench with adjustable counter-force arm |
| CN214560439U (en) * | 2020-11-30 | 2021-11-02 | 苏州洛瑞卡新材料科技有限公司 | Torsion multiplier counter-force arm positioning mechanism |
| CN216008778U (en) * | 2021-10-28 | 2022-03-11 | 重庆海装风电工程技术有限公司 | Tool for maintaining pitch bearing bolt of wind generating set |
-
2022
- 2022-03-29 CN CN202210315125.8A patent/CN114536262B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180193988A1 (en) * | 2015-08-26 | 2018-07-12 | Redback Pneumatics Pty Ltd | Rotational driver |
| CN107457736A (en) * | 2016-06-03 | 2017-12-12 | 德州德劲液压动力有限公司 | A kind of Optimization-type hydraulic torque wrench |
| CN207578284U (en) * | 2017-11-15 | 2018-07-06 | 山东汉普机械工业有限公司 | A kind of automobile tire counter-force arm |
| CN209919764U (en) * | 2019-04-25 | 2020-01-10 | 上海臻友设备工程技术有限公司 | Hydraulic wrench with adjustable counter-force arm |
| CN214560439U (en) * | 2020-11-30 | 2021-11-02 | 苏州洛瑞卡新材料科技有限公司 | Torsion multiplier counter-force arm positioning mechanism |
| CN216008778U (en) * | 2021-10-28 | 2022-03-11 | 重庆海装风电工程技术有限公司 | Tool for maintaining pitch bearing bolt of wind generating set |
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| Publication number | Publication date |
|---|---|
| CN114536262B (en) | 2023-10-20 |
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