CN112846263A - Replacement tool for three-jaw flexible chuck on numerical control machine tool and working method of replacement tool - Google Patents
Replacement tool for three-jaw flexible chuck on numerical control machine tool and working method of replacement tool Download PDFInfo
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- CN112846263A CN112846263A CN202011622646.5A CN202011622646A CN112846263A CN 112846263 A CN112846263 A CN 112846263A CN 202011622646 A CN202011622646 A CN 202011622646A CN 112846263 A CN112846263 A CN 112846263A
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- 208000017740 grade III prostatic intraepithelial neoplasia Diseases 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/103—Retention by pivotal elements, e.g. catches, pawls
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Abstract
The invention discloses a replacing tool of a three-jaw flexible chuck on a numerical control machine tool and a working method thereof.A pull rod is connected with a connecting rod through a straight pin II, the connecting rod is connected with a swing rod through a straight pin I, the swing rod is connected with a main body through a straight pin IV, a through hole is formed in the swing rod, a straight pin III is installed in the through hole, a handle rod is connected with a handle seat, an auxiliary handle rod fixing hole is formed in the main body, the auxiliary handle rod is fixedly connected in the auxiliary handle rod fixing hole, a spring placing groove is formed in the main body, a spring is placed in the spring placing groove, a bearing is arranged above the spring, and the handle seat penetrates through the bearing and the spring to be connected with the pull rod through threads; after adopting above-mentioned structure, through setting up longer handle bar for the arm of force is longer, and is more laborsaving during the use, has additionally increased an auxiliary handle pole, when using this instrument, can be one by hand auxiliary handle pole, rotatory handle pole on the other hand plays fine locate function.
Description
Technical Field
The invention relates to the technical field of numerical control machines, in particular to a tool for replacing a three-jaw flexible chuck on a numerical control machine and a working method thereof.
Background
The numerical control machine tool is important basic equipment in the current industry and is a production means of various strut industries such as automobiles, aerospace, dies, electronics and the like. In the production process, the variety of the processed products is various, the three-jaw flexible chuck is required to be selected for use in processing of partial products, a clamping workpiece is used for processing, the flexible chuck has a certain service life, regular maintenance and replacement are required, the tool provided at present adopts a round handle, the tool is easy to slip and cannot bear force during use, and the tool is difficult to operate due to the fact that the moment arm is short, and is relatively labor-consuming during use.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a replacing tool for a three-jaw flexible chuck on a numerical control machine tool and a working method thereof, wherein the length of each handle rod is prolonged, and the lengthened handle rods are adopted to ensure that the force arm is longer and more labor is saved during use; meanwhile, an auxiliary handle rod is additionally arranged on the main body, when the tool is used, the auxiliary handle rod can be held by one hand, the handle rod can be rotated by the other hand, a good positioning function can be achieved, and the tool is simpler and more convenient to use; the auxiliary handle rod is arranged at the position of the auxiliary handle rod fixing hole and serves as an auxiliary stress point, the auxiliary handle rod can play a role in positioning and auxiliary supporting in the rotating process, and is not easy to slip when meeting oil stains, so that double guarantee is formed, and the operation is simpler and easier; the bearing groove is added for placing the bearing, so that the friction resistance is reduced in the rotating process, and the labor is saved when the device is used; the spring is placed in a spring placing groove in the main body and is placed below the bearing, so that a counterforce is provided when the chuck is loosened, and the tool is loosened; the three handle rods are uniformly distributed, so that slipping caused by oil stain can be effectively reduced; the swing rod is pulled by the right hand handle rod to drive the straight pin III on the swing rod to clamp the chuck, the swing rod is pushed by the left hand handle rod to loosen the chuck, and the chuck is loosened more conveniently under the counter-acting force of the spring.
The purpose of the invention can be realized by the following technical scheme:
a replacing tool for a three-jaw flexible chuck on a numerical control machine tool comprises a main body, a swing rod, a straight pin III, a straight pin IV, an auxiliary handle rod, a handle seat, a handle rod, a pull rod, a bearing, a spring, a straight pin I, a straight pin II, a connecting rod, an auxiliary handle rod fixing hole, a swing rod fixing hole, a pull rod groove, a spring placing groove, a bearing groove, a straight pin hole I, a straight pin hole II, a handle rod connecting hole, handle seat threads, a pull rod built-in threaded hole and a pull rod straight pin hole;
the utility model discloses a handle, including main part, pull rod, pendulum rod, handle seat, spring, bearing, pull rod and connecting rod, the pull rod is connected through straight round pin two with the connecting rod, the connecting rod is connected through straight round pin one with the pendulum rod, the pendulum rod is connected through straight round pin four with the main part, seted up the through-hole on the pendulum rod, install straight round pin three in the through-hole, the handle rod is connected with the handle seat, the auxiliary handle pole fixed orifices has been seted up in the main part, auxiliary handle pole fixed connection is in auxiliary handle pole fixed orifices, the spring standing groove has been seted up to the inside of main part, the spring has been placed in the.
As a further scheme of the invention: the bearing groove has been seted up at the main part top, and the bearing groove is located spring standing groove top, the pull rod groove has been seted up to the main part is inside, and the pull rod groove is located spring standing groove bottom, the bearing is placed in the bearing inslot portion, pull rod top movable mounting is in the pull rod groove.
As a further scheme of the invention: straight pinhole one has all been seted up at the pendulum rod both ends, straight pinhole two has all been seted up at the connecting rod both ends.
As a further scheme of the invention: three handle pole connecting holes, it is three to have seted up at handle seat top handle pole connecting holes angular distribution such as, handle seat screw thread has been seted up to handle seat bottom axial plane, it is three handle pole fixed mounting is in handle pole connecting hole, handle seat passes through handle seat screw thread and the built-in screw hole threaded connection of pull rod.
As a further scheme of the invention: the built-in threaded hole of pull rod has been seted up to the inside top of pull rod, six straight pinhole of pull rod has been seted up to the pull rod bottom, six two pairs of straight pinhole of pull rod are called a set ofly, three groups the straight pinhole of pull rod is around the equal angular distribution of the vertical central line of pull rod, the pull rod bottom is connected with three connecting rod through two rotations of three straight round pin, one two straight round pin settings of straight pinhole and the straight round pin hole of a connecting rod inner end of a set of pull rod are passed to straight round pin.
As a further scheme of the invention: six pendulum rod fixed orificess have been seted up to the main part bottom, six the two bisymmetry of pendulum rod fixed orifices is a set of, three groups the pendulum rod fixed orifices centers on the vertical central line symmetric distribution of main part, the main part bottom is connected with three pendulum rod, one through four rotations of three straight round pin the straight round pin of four passes a set of pendulum rod fixed orificess and the setting of straight round pin hole of a pendulum rod outer end.
As a further scheme of the invention: and the straight pin I penetrates through a straight pin hole II at the outer end of the connecting rod and a straight pin hole I at the inner end of the swing rod to rotatably connect the connecting rod with the swing rod.
As a further scheme of the invention: the working method of the tool for replacing the three-jaw flexible chuck on the numerical control machine tool comprises the following steps:
rotating the handle pole, drive the handle seat and rotate, the handle seat rotates, drive the pull rod and remove, when the handle pole dextrorotation, the pull rod removes to the handle seat direction, drive the connecting rod motion, the connecting rod applys a pulling force for the pendulum rod, form the lever through straight round pin four connections, because the lever motion, install the tight action of clamp is carried out to straight round pin three on the pendulum rod, when the handle pole levogyration, can apply a thrust to the pull rod, under the reaction force of spring, the handle seat is kept away from to the pull rod, the same thing at this moment, the action of loosening can be carried out to straight round pin three of assembly on the pendulum rod.
The invention has the beneficial effects that:
1. the length of each handle rod is prolonged, and the lengthened handle rods are adopted, so that the force arm is longer, and labor is saved during use; meanwhile, an auxiliary handle rod is additionally arranged on the main body, when the tool is used, the auxiliary handle rod can be held by one hand, the handle rod can be rotated by the other hand, a good positioning function can be achieved, and the tool is simpler and more convenient to use; the auxiliary handle pole is installed in auxiliary handle pole fixed orifices position, as supplementary stress point, can play location and auxiliary stay's effect at rotatory in-process, meets the greasy dirt and also is difficult for skidding, forms dual assurance, makes the operation more simple and easy.
2, the invention adds a bearing groove for placing a bearing, reduces the friction resistance in the rotating process and saves more labor when in use; a spring is placed in a spring placement groove in the body and placed below the bearing to provide a reaction force for loosening the chuck and the tool.
3. The three handle rods are uniformly distributed, so that slipping caused by oil stain can be effectively reduced; the swing rod is pulled by the right hand handle rod to drive the straight pin III on the swing rod to clamp the chuck, the swing rod is pushed by the left hand handle rod to loosen the chuck, and the chuck is loosened more conveniently under the counter-acting force of the spring.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall cross-sectional structure of the present invention;
FIG. 3 is an enlarged view of the area A in FIG. 2;
FIG. 4 is a schematic illustration of an explosive structure according to the present invention;
FIG. 5 is a schematic diagram of an exploded cross-sectional structure of the present invention;
FIG. 6 is a schematic cross-sectional view of a main body according to the present invention;
FIG. 7 is a cross-sectional view of the tie bar of the present invention;
FIG. 8 is a sectional view of the handle seat of the present invention.
In the figure: 1. a main body; 2. a swing rod; 3. a third straight pin; 4. a straight pin IV; 5. an auxiliary handle lever; 6. a handle seat; 7. a handle bar; 8. a pull rod; 9. a bearing; 10. a spring; 11. a first straight pin; 12. a second straight pin; 13. a connecting rod; 101. an auxiliary handle rod fixing hole; 102. a swing rod fixing hole; 103. a pull rod groove; 104. a spring placing groove; 105. a bearing groove; 201. a first straight pin hole; 202. a straight pin hole II; 601. a handle lever connection hole; 602. handle seat threads; 801. the pull rod is internally provided with a threaded hole; 802. a pull rod straight pin hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, a tool for replacing a three-jaw flexible chuck on a numerical control machine tool includes a main body 1, a swing rod 2, a straight pin three 3, a straight pin four 4, an auxiliary handle rod 5, a handle seat 6, a handle rod 7, a pull rod 8, a bearing 9, a spring 10, a straight pin one 11, a straight pin two 12, a connecting rod 13, an auxiliary handle rod fixing hole 101, a swing rod fixing hole 102, a pull rod groove 103, a spring placing groove 104, a bearing groove 105, a straight pin hole one 201, a straight pin hole two 202, a handle rod connecting hole 601, a handle seat thread 602, a pull rod internal threaded hole 801, and a pull rod straight pin hole 802;
the handle 8 is connected with a connecting rod 13 through a straight pin II 12, the connecting rod 13 is connected with a swing rod 2 through a straight pin I11, the swing rod 2 is connected with a main body 1 through a straight pin IV 4, a through hole is formed in the swing rod 2, a straight pin III 3 is installed in the through hole, the handle rod 7 is connected with a handle seat 6, an auxiliary handle rod fixing hole 101 is formed in the main body 1, the auxiliary handle rod 5 is fixedly connected in the auxiliary handle rod fixing hole 101, a spring placing groove 104 is formed in the main body 1, a spring 10 is placed in the spring placing groove 104, a bearing 9 is arranged above the spring 10, the handle seat 6 penetrates through the bearing 9 and the spring 10 to be in threaded connection with the handle 8, the handle rod 7 is of an elongated type, and the arm of force is made to be longer by adopting the elongated handle rod 7, so that the handle rod is labor-saving; meanwhile, an auxiliary handle rod 5 is additionally arranged on the main body 1, when the tool is used, the auxiliary handle rod 5 can be held by one hand, the handle rod 7 can be rotated by the other hand, a good positioning function can be achieved, and the tool is simpler and more convenient to use.
The top of the main body 1 is provided with a bearing groove 105, the bearing groove 105 is positioned at the top of the spring placing groove 104, the main body 1 is internally provided with a pull rod groove 103, the pull rod groove 103 is positioned at the bottom of the spring placing groove 104, the bearing 9 is placed in the bearing groove 105, and the top of the pull rod 8 is movably installed in the pull rod groove 103; the bearing groove 105 is added for placing the bearing 9, so that the friction resistance is reduced in the rotating process, and the labor is saved when the device is used; spring 10 is placed in spring receiving slot 104 in body 1, below bearing 9, to provide a reaction force to loosen the tool when the chuck is loosened.
The two ends of the swing rod 2 are provided with a first straight pin hole 201, and the two ends of the connecting rod 13 are provided with a second straight pin hole 202.
The top of the handle seat 6 is provided with three handle rod connecting holes 601, the three handle rod connecting holes 601 are distributed at equal angles, the bottom axial surface of the handle seat 6 is provided with handle seat threads 602, the three handle rods 7 are fixedly arranged in the handle rod connecting holes 601, and the handle seat 6 is in threaded connection with the pull rod built-in threaded hole 801 through the handle seat threads 602; through the design of three handle bars 7 evenly distributed, can effectively reduce the skid that leads to because of the greasy dirt problem.
The built-in screw hole 801 of pull rod is seted up on the inside top of pull rod 8, six pull rod straight pinhole 802 have been seted up to pull rod 8 bottom, six two bisymmetry of pull rod straight pinhole 802 are a set of, three group pull rod straight pinhole 802 is around the equal angular distribution of 8 vertical central lines of pull rod, 8 bottoms of pull rod are rotated through two 12 three straight round pins and are connected with three connecting rod 13, one two 12 straight round pins pass the straight pinhole two 202 settings of a set of pull rod straight pinhole 802 and a connecting rod 13 inner end.
Six pendulum rod fixed orifices 102 have been seted up to main part 1 bottom, six the two bisymmetry of pendulum rod fixed orifices 102 is a set of, three groups pendulum rod fixed orifices 102 center on the vertical central line symmetric distribution of main part 1, 1 bottom of main part is rotated through four 4 three straight round pins and is connected with three pendulum rod 2, one the straight round pin four 4 passes a set of pendulum rod fixed orifices 102 and the straight round pin hole 201 setting of the 2 outer ends of a pendulum rod.
One straight pin I11 penetrates through a straight pin hole II 202 at the outer end of one connecting rod 13 and a straight pin hole I201 at the inner end of one swing rod 2 to rotatably connect one connecting rod 13 with one swing rod 2.
The working principle of the invention is as follows:
the handle rod 7 is rotated to drive the handle seat 6 to rotate, the handle seat 6 is rotated to drive the pull rod 8 to move, during dextrorotation, the pull rod 8 moves towards the handle seat 6 to drive the connecting rod 13 to move, the connecting rod 13 applies a pulling force to the swing rod 2, a lever is formed by connecting the straight pin four 4, and at the moment, due to the movement of the lever, the straight pin three 3 assembled on the swing rod 2 can execute clamping action. When the handle lever 7 is rotated leftwards, a pushing force is applied to the pull rod 8, the reaction force of the spring 10 exists and is far away from the handle seat 6, and at the moment, the straight pin III 3 assembled on the swing rod 2 performs a loosening action in the same way; through the right-handed handle lever 7, the swing rod 2 is pulled to drive the straight pin three 3 on the swing rod 2 to clamp the chuck, and when the handle lever 7 is rotated left, the swing rod 2 is pushed, the chuck is loosened, and the loosening is more convenient under the counter-acting force of the spring 10.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. A replacing tool for a three-jaw flexible chuck on a numerical control machine tool is characterized by comprising a main body (1), a swing rod (2), a straight pin III (3), a straight pin IV (4), an auxiliary handle rod (5), a handle seat (6), a handle rod (7), a pull rod (8), a bearing (9), a spring (10), a straight pin I (11), a straight pin II (12), a connecting rod (13), an auxiliary handle rod fixing hole (101), a swing rod fixing hole (102), a pull rod groove (103), a spring placing groove (104), a bearing groove (105), a straight pin hole I (201), a straight pin hole II (202), a handle rod connecting hole (601), a seat handle thread (602), a pull rod built-in threaded hole (801) and a pull rod straight pin hole (802);
the pull rod (8) is connected with the connecting rod (13) through a straight pin II (12), the connecting rod (13) is connected with the swing rod (2) through a straight pin I (11), the swing rod (2) is connected with the main body (1) through a straight pin III (4), a through hole is arranged on the swing rod (2), a straight pin III (3) is arranged in the through hole, the handle rod (7) is connected with the handle seat (6), the main body (1) is provided with an auxiliary handle rod fixing hole (101), the auxiliary handle rod (5) is fixedly connected in the auxiliary handle rod fixing hole (101), a spring placing groove (104) is arranged in the main body (1), a spring (10) is placed in the spring placing groove (104), a bearing (9) is arranged above the spring (10), and the handle seat (6) penetrates through the bearing (9) and the spring (10) to be in threaded connection with the pull rod (8).
2. The tool for replacing the three-jaw flexible chuck on the numerical control machine tool is characterized in that a bearing groove (105) is formed in the top of the main body (1), the bearing groove (105) is located in the top of the spring placing groove (104), a pull rod groove (103) is formed in the main body (1), the pull rod groove (103) is located in the bottom of the spring placing groove (104), the bearing (9) is placed in the bearing groove (105), and the top of the pull rod (8) is movably installed in the pull rod groove (103).
3. The tool for replacing the three-jaw flexible chuck on the numerical control machine tool is characterized in that a first straight pin hole (201) is formed at each of two ends of the swing rod (2) in a matched mode, and a second straight pin hole (202) is formed at each of two ends of the connecting rod (13).
4. The tool for replacing the three-jaw flexible chuck on the numerical control machine tool is characterized in that three handle rod connecting holes (601) are formed in the top of the handle seat (6), the three handle rod connecting holes (601) are distributed at equal angles, handle seat threads (602) are formed in the bottom axial surface of the handle seat (6), the three handle rods (7) are fixedly installed in the handle rod connecting holes (601), and the handle seat (6) is in threaded connection with the pull rod built-in threaded hole (801) through the handle seat threads (602).
5. The tool for replacing the three-jaw flexible chuck on the numerical control machine tool is characterized in that a pull rod built-in threaded hole (801) is formed in the top end of the inside of the pull rod (8), six pull rod straight pin holes (802) are formed in the bottom of the pull rod (8), the six pull rod straight pin holes (802) are symmetrical in pairs to form a group, three groups of pull rod straight pin holes (802) are distributed in an equal angle mode around the vertical center line of the pull rod (8), three connecting rods (13) are rotatably connected to the bottom of the pull rod (8) through three straight pin pairs (12), and one straight pin pair (12) penetrates through one group of pull rod straight pin holes (802) and the straight pin hole pair (202) in the inner end of one connecting rod (13).
6. The replacing tool for the three-jaw flexible chuck on the numerical control machine tool is characterized in that six swing rod fixing holes (102) are formed in the bottom of the main body (1), each two of the six swing rod fixing holes (102) are symmetrical to form a group, three groups of the swing rod fixing holes (102) are symmetrically distributed around the vertical central line of the main body (1), three swing rods (2) are rotatably connected to the bottom of the main body (1) through three straight pins four (4), and one straight pin four (4) penetrates through one group of swing rod fixing holes (102) and one straight pin hole one (201) in the outer end of each swing rod (2).
7. The tool for replacing the three-jaw flexible chuck on the numerical control machine tool is characterized in that one straight pin I (11) penetrates through a straight pin hole II (202) at the outer end of one connecting rod (13) and a straight pin hole I (201) at the inner end of one swinging rod (2) to rotatably connect the connecting rod (13) with the swinging rod (2).
8. A working method of a tool for replacing a three-jaw flexible chuck on a numerical control machine is characterized in that the working method of the tool for replacing the three-jaw flexible chuck on the numerical control machine is as follows:
rotating handle pole (7), drive handle seat (6) and rotate, handle seat (6) rotate, drive pull rod (8) and remove, when handle pole (7) dextrorotation, pull rod (8) move to handle seat (6) direction, drive connecting rod (13) motion, connecting rod (13) are for pendulum rod (2) applys a pulling force, connect through straight four (4) of round pin and form the lever, because lever motion, install straight three (3) of round pin on pendulum rod (2) and can carry out the action of pressing from both sides tightly, when handle pole (7) levogyration, can apply a thrust to pull rod (8), under the reaction force of spring (10), handle seat (6) are kept away from in pull rod (8), the same reason at this moment, the action of unclamping can be carried out in straight three (3) of round pin of assembly on pendulum rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622646.5A CN112846263A (en) | 2020-12-31 | 2020-12-31 | Replacement tool for three-jaw flexible chuck on numerical control machine tool and working method of replacement tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622646.5A CN112846263A (en) | 2020-12-31 | 2020-12-31 | Replacement tool for three-jaw flexible chuck on numerical control machine tool and working method of replacement tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112846263A true CN112846263A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011622646.5A Pending CN112846263A (en) | 2020-12-31 | 2020-12-31 | Replacement tool for three-jaw flexible chuck on numerical control machine tool and working method of replacement tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112846263A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696208A (en) * | 1985-12-13 | 1987-09-29 | Lay Tsay T | Direction-changeable structure of hand tool handle |
| CN202169389U (en) * | 2011-06-13 | 2012-03-21 | 广德力达电气有限公司 | Auxiliary device for drilling machine handle |
| US20170291277A1 (en) * | 2016-04-11 | 2017-10-12 | Zhejiang Jinmei Electric Tools Co., Ltd. | Rapid-replacing structure of multifunctional saw |
| CN206982194U (en) * | 2017-05-14 | 2018-02-09 | 赵锋 | A kind of rod-pulling type positioning clamping device |
-
2020
- 2020-12-31 CN CN202011622646.5A patent/CN112846263A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696208A (en) * | 1985-12-13 | 1987-09-29 | Lay Tsay T | Direction-changeable structure of hand tool handle |
| CN202169389U (en) * | 2011-06-13 | 2012-03-21 | 广德力达电气有限公司 | Auxiliary device for drilling machine handle |
| US20170291277A1 (en) * | 2016-04-11 | 2017-10-12 | Zhejiang Jinmei Electric Tools Co., Ltd. | Rapid-replacing structure of multifunctional saw |
| CN206982194U (en) * | 2017-05-14 | 2018-02-09 | 赵锋 | A kind of rod-pulling type positioning clamping device |
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