CN113400107A - Scissor blade grinding device convenient to adjust grinding speed and improve work efficiency - Google Patents
Scissor blade grinding device convenient to adjust grinding speed and improve work efficiency Download PDFInfo
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- CN113400107A CN113400107A CN202110689285.4A CN202110689285A CN113400107A CN 113400107 A CN113400107 A CN 113400107A CN 202110689285 A CN202110689285 A CN 202110689285A CN 113400107 A CN113400107 A CN 113400107A
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- 238000005498 polishing Methods 0.000 claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000003466 welding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 230000033001 locomotion Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 8
- 238000009958 sewing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/52—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of shear blades or scissors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention relates to the technical field of tools for sewing clothes and discloses a scissor blade polishing device convenient for adjusting polishing speed and improving working efficiency. This scissor piece grinding device convenient to adjust speed of polishing and improve work efficiency rotates first carousel for fixed frame up-and-down motion between two support columns, and the distance between the platform top of polishing and the mill can change this moment, thereby has reached the effect of being convenient for polish to the scissor piece of different thickness. The second turntable is rotated, so that the transmission ratio between the driven disc and the transmission turntable is changed, the rotating speed of the polishing disc of the starting driving motor is changed, and the effect of conveniently adjusting the polishing speed according to the burr protruding degree is achieved.
Description
Technical Field
The invention relates to the technical field of tools for sewing clothes, in particular to a scissor blade polishing device which is convenient for adjusting polishing speed and improving working efficiency.
Background
The scissors are double-edge tools for cutting sheet or linear objects such as cloth, paper, ropes and the like, and the two edges are staggered and can be opened and closed. When clothes are sewn, scissors are often used for cutting cloth, textiles and the like, the scissors are unfamiliar but have wide application, and when tools such as a knife and a shovel are not strong, the scissors can be easily solved, so that the scissors are nowadays indispensable tools for daily production and life of people.
The existing scissor piece polishing device is single in structure and fixed, the polishing speed cannot be adjusted according to the burr protruding degree of the surface of the scissor piece, the production efficiency is greatly influenced, the adjustment of the polishing speed according to the burr protruding degree is an important problem, and therefore the scissor piece polishing device convenient for adjusting the polishing speed and improving the working efficiency is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the scissor blade polishing device which is convenient for adjusting the polishing speed and improving the working efficiency, has the advantage of being convenient for adjusting the polishing speed according to the burr protrusion degree, and solves the problems that the conventional scissor blade polishing device is single and fixed in structure, cannot adjust the polishing speed according to the burr protrusion degree on the surface of the scissor blade, and greatly influences the production efficiency.
(II) technical scheme
In order to realize the purpose of conveniently adjusting the grinding speed according to the protrusion degree of the burrs, the invention provides the following technical scheme: a scissor blade polishing device convenient for adjusting polishing speed and improving working efficiency comprises a base, wherein a polishing platform is fixedly connected to the top of the base, a support column is welded to the top of the right side of the base, a first rotary disc is movably connected to the right side of the support column, a first driving lead screw is fixedly connected to the left side of the first rotary disc, a first transverse slider is in threaded connection with the outer wall of the first driving lead screw, a connecting rod is in riveted connection with the bottom of the first transverse slider, a fixed frame is in riveted connection with one side of the connecting rod away from the first transverse slider, a first lantern ring is fixedly connected to the right side of the top of the fixed frame, a connecting spring is fixedly connected to the bottom of the first lantern ring, a second lantern ring is fixedly connected to one side of the connecting spring away from the first lantern ring, a driving motor is movably connected to the top of the fixed frame, and a driving disc is fixedly connected to the bottom of the driving motor, the bottom transmission of drive disc is connected with the transmission carousel, the inside swing joint of transmission carousel has the horizontal slider of second, the inside threaded connection of the horizontal slider of second has the second drive lead screw, the left side welding of second drive lead screw has the second carousel, the bottom transmission of transmission carousel is connected with driven disc, the bottom fixedly connected with of driven disc beats the mill.
Preferably, the left side and the right side of the top of the base are welded with supporting columns.
Preferably, the first transverse sliding block is internally provided with threads matched with the outer wall of the first driving screw rod, and the left side and the right side of the outer wall of the first driving screw rod are both in threaded connection with the first transverse sliding block.
Preferably, the inner parts of the first lantern ring and the second lantern ring are sleeved on the outer wall of the supporting column, and the left side of the second lantern ring is fixedly connected to the bottom of the right side of the fixing frame.
Preferably, the driving disk is the same as the driven disk in size and shape, and the driving disk is arranged above the driven disk at the left side.
Preferably, the transmission turntable can move left and right along with the second transverse sliding block.
Preferably, the second transverse sliding block is internally provided with a thread matched with the outer wall of the second driving screw rod.
Preferably, the polishing disc is arranged right above the polishing platform, and the top of the polishing disc is movably connected with the inside of the bottom of the fixed frame.
(III) advantageous effects
Compared with the prior art, the invention provides the scissor blade polishing device which is convenient for adjusting the polishing speed and improving the working efficiency, and has the following beneficial effects:
1. this scissor piece grinding device convenient to adjust speed of polishing and improve work efficiency, through first carousel and first horizontal slider, first drive lead screw, fixed frame, the support column, the polishing dish, the cooperation of the platform of polishing is used, rotate first carousel, first horizontal slider can be at the outer wall side-to-side movement of first drive lead screw this moment, further make fixed frame up-and-down motion between two support columns, the distance between polishing dish and the platform top of polishing this moment can change, thereby reached and be convenient for carry out the effect of polishing to the scissor piece of different thickness.
2. This scissor piece grinding device convenient to adjust speed of polishing and improve work efficiency, through second carousel and driven turntable, the driver disc, driven disc, driving motor, the cooperation of polishing dish is used, the second carousel rotates, the transmission carousel can be at the side-to-side motion between driver disc and driven disc this moment, further make the drive ratio between driven disc and the transmission carousel change, the slew velocity that starts driving motor polishing dish this moment can change, thereby reached and be convenient for polish the effect of speed adjustment according to the protruding degree of burr.
Drawings
FIG. 1 is a schematic front view of the overall structure of the present invention;
FIG. 2 is a front view of the driving disk structure of the present invention;
FIG. 3 is a left side view of the structure of the transmission turntable of the present invention;
FIG. 4 is an enlarged view of the structure A of FIG. 1 according to the present invention.
In the figure: 1. a base; 2. polishing the platform; 3. a support pillar; 4. a first turntable; 5. a first drive screw; 6. a first lateral slider; 7. a connecting rod; 8. a fixing frame; 9. a first collar; 10. a connecting spring; 11. a second collar; 12. a drive motor; 13. a drive disk; 14. a transmission turntable; 15. a second lateral slider; 16. a second drive screw; 17. a second turntable; 18. a driven disk; 19. a grinding disc.
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. 1-4, a scissor blade polishing device convenient for adjusting polishing speed and improving work efficiency comprises a base 1, a polishing platform 2 is fixedly connected to the top of the base 1, support columns 3 are welded to the top of the right side of the base 1, the support columns 3 are welded to the left side and the right side of the top of the base 1, a first rotating disc 4 is movably connected to the right side of each support column 3, a first driving screw 5 is fixedly connected to the left side of each first rotating disc 4, a first transverse slider 6 is in threaded connection with the outer wall of the first driving screw 5, threads matched with the outer wall of the first driving screw 5 are arranged inside each first transverse slider 6, a first transverse slider 6 is in threaded connection with the left side and the right side of the outer wall of the first driving screw 5, a connecting rod 7 is riveted to the bottom of each first transverse slider 6, a fixing frame 8 is riveted to the side of the connecting rod 7 far away from the first transverse slider 6, and a first collar 9 is fixedly connected to the right side of the top of the fixing frame 8, the bottom of the first collar 9 is fixedly connected with a connecting spring 10, one side of the connecting spring 10 far away from the first collar 9 is fixedly connected with a second collar 11, the inside of the first collar 9 and the second collar 11 are sleeved on the outer wall of the supporting column 3, the left side of the second collar 11 is fixedly connected with the bottom of the right side of the fixed frame 8, the top of the fixed frame 8 is movably connected with a driving motor 12, the bottom of the driving motor 12 is fixedly connected with a driving disc 13, the bottom of the driving disc 13 is in transmission connection with a transmission turntable 14, the inside of the transmission turntable 14 is movably connected with a second transverse slider 15, the transmission turntable 14 can move left and right along with the second transverse slider 15, the inside of the second transverse slider 15 is in threaded connection with a second driving screw rod 16, the inside of the second transverse slider 15 is provided with threads matched with the outer wall of the second driving screw rod 16, and the left side of the second driving screw rod 16 is welded with a second turntable 17, the bottom transmission of transmission carousel 14 is connected with driven disc 18, and the big or small shape of drive disc 13 all is the same with driven disc 18, and drive disc 13 is in the upper left side of driven disc 18, and the bottom fixedly connected with of driven disc 18 polishes dish 19, polishes the dish 19 directly over the platform 2 of polishing, polishes the inside swing joint of the top of dish 19 and fixed frame 8 bottom.
Detailed description referring to fig. 1, firstly, a scissor piece to be polished is fixed on the top of a polishing platform 2, at this time, a first rotating disc 4 is rotated, a first driving screw 5 is fixedly connected to the left side of the first rotating disc 4, at this time, the first driving screw 5 can also rotate, at this time, a first transverse slider 6 is connected to the outer wall of the first driving screw 5 through a screw thread, a screw thread adapted to the outer wall of the first driving screw 5 is arranged inside the first transverse slider 6, at this time, the first transverse slider 6 can move left and right on the outer wall of the first driving screw 5, at this time, a connecting rod 7 is riveted to the bottom of the first transverse slider 6, a fixed frame 8 is riveted to one side of the connecting rod 7 far away from the first transverse slider 6, at this time, the fixed frame 8 can move up and down, at this time, a first collar 9 is fixedly connected to the right side of the top of the fixed frame 8, and a connecting spring 10 is fixedly connected to the bottom of the first collar 9, one side fixedly connected with second lantern ring 11 that first lantern ring 9 was kept away from to coupling spring 10, the outer wall at support column 3 is cup jointed to the inside of first lantern ring 9 and second lantern ring 11, and the left side fixed connection of second lantern ring 11 is in the bottom on fixed frame 8 right side, so fixed frame 8 can be between two support columns 3 up-and-down motion this moment, again because the inside swing joint of the top of polishing dish 19 and fixed frame 8 bottom, so the lower motion also more than 19 of polishing dish this moment, again because polishing dish 19 is directly over platform 2 of polishing, so the distance between polishing dish 19 and the platform 2 top of polishing this moment also can change, thereby reached and be convenient for carry out the effect of polishing to the scissors piece of different thickness.
Referring to fig. 2 in detail, as the second rotary table 17 is rotated, the second rotary table 17 is welded on the left side of the second driving screw 16, so that the second driving screw 16 can also rotate, and as the second driving screw 16 is connected to the inner thread of the second transverse slider 15, and the inner part of the second transverse slider 15 has a thread adapted to the outer wall of the second driving screw 16, the second transverse slider 15 can move left and right on the outer wall of the second driving screw 16.
Referring to fig. 3 and 4 in detail, since the second transverse slider 15 is movably connected inside the transmission rotary table 14, the transmission rotary table 14 can move left and right along with the second transverse slider 15, at this time, the transmission rotary table 14 can move left and right along with the second transverse slider 15, and since the bottom of the driving disc 13 is in transmission connection with the transmission rotary table 14 and the bottom of the transmission rotary table 14 is in transmission connection with the driven disc 18, at this time, the transmission rotary table 14 can move left and right between the driving disc 13 and the driven disc 18, and since the driving disc 13 has the same size and shape as the driven disc 18 and the driving disc 13 is above and to the left of the driven disc 18, at this time, the transmission ratio between the driven disc 18 and the driving disc 13 can be changed.
The driving motor 12 is started at the moment, the driving disc 13 can rotate at the moment because the bottom of the driving motor 12 is fixedly connected with the driving disc 13, the rotating speed of the driven disc 18 is further changed, and the rotating speed of the polishing disc 19 can be changed at the moment because the bottom of the driven disc 18 is fixedly connected with the polishing disc 19, so that the effect of adjusting the polishing speed according to the protruding degree of burrs is achieved.
In conclusion, this be convenient for adjust scissor piece grinding device that speed of polishing improves work efficiency rotates first carousel 4, and first transverse sliding block 6 can be at the outer wall side-to-side motion of first drive lead screw 5 this moment, further makes fixed frame 8 up-and-down motion between two support columns 3, and the distance between 19 and the platform 2 tops of polishing this moment can change to the effect of being convenient for polish to the scissor piece of different thickness has been reached.
Rotate second carousel 17, transmission carousel 14 can be at this moment between drive disc 13 and driven disc 18 side-to-side movement, further makes the drive ratio between driven disc 18 and the transmission carousel 14 change, and the slew velocity that starts driving motor 12 and polish dish 19 this moment can change to reach the effect of being convenient for carry out the speed of polishing according to the protruding degree of burr and adjust.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a shear blade grinding device convenient to adjust speed of polishing and improve work efficiency, includes base (1), its characterized in that: the polishing machine is characterized in that a polishing platform (2) is fixedly connected to the top of the base (1), a support column (3) is welded to the top of the right side of the base (1), a first rotary table (4) is movably connected to the right side of the support column (3), a first driving lead screw (5) is fixedly connected to the left side of the first rotary table (4), a first transverse slider (6) is in threaded connection with the outer wall of the first driving lead screw (5), a connecting rod (7) is riveted to the bottom of the first transverse slider (6), a fixed frame (8) is riveted to one side, away from the first transverse slider (6), of the connecting rod (7), a first lantern ring (9) is fixedly connected to the right side of the top of the fixed frame (8), a connecting spring (10) is fixedly connected to the bottom of the first lantern ring (9), and a second lantern ring (11) is fixedly connected to one side, away, the top swing joint of fixed frame (8) has driving motor (12), the bottom fixedly connected with drive disc (13) of driving motor (12), the bottom transmission of drive disc (13) is connected with transmission carousel (14), the inside swing joint of transmission carousel (14) has the horizontal slider of second (15), the internal thread of the horizontal slider of second (15) is connected with second drive lead screw (16), the left side welding of second drive lead screw (16) has second carousel (17), the bottom transmission of transmission carousel (14) is connected with driven disc (18), the bottom fixedly connected with of driven disc (18) beats mill (19).
2. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: the left side and the right side of the top of the base (1) are welded with support columns (3).
3. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: the inner part of the first transverse sliding block (6) is provided with threads matched with the outer wall of the first driving screw rod (5), and the left side and the right side of the outer wall of the first driving screw rod (5) are in threaded connection with the first transverse sliding block (6).
4. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: the inner parts of the first lantern ring (9) and the second lantern ring (11) are sleeved on the outer wall of the supporting column (3), and the left side of the second lantern ring (11) is fixedly connected to the bottom of the right side of the fixing frame (8).
5. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: the driving disc (13) is the same as the driven disc (18) in size and shape, and the driving disc (13) is arranged above the driven disc (18) at the left side.
6. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: the transmission turntable (14) can move left and right along with the second transverse sliding block (15).
7. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: and the second transverse sliding block (15) is internally provided with a thread matched with the outer wall of the second driving screw rod (16).
8. A scissor sharpening device facilitating adjustment of sharpening speed to improve working efficiency as claimed in claim 1, wherein: the polishing disc (19) is arranged right above the polishing platform (2), and the top of the polishing disc (19) is movably connected with the inside of the bottom of the fixed frame (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110689285.4A CN113400107A (en) | 2021-06-22 | 2021-06-22 | Scissor blade grinding device convenient to adjust grinding speed and improve work efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110689285.4A CN113400107A (en) | 2021-06-22 | 2021-06-22 | Scissor blade grinding device convenient to adjust grinding speed and improve work efficiency |
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| Publication Number | Publication Date |
|---|---|
| CN113400107A true CN113400107A (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110689285.4A Pending CN113400107A (en) | 2021-06-22 | 2021-06-22 | Scissor blade grinding device convenient to adjust grinding speed and improve work efficiency |
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| CN (1) | CN113400107A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927225A (en) * | 2011-08-10 | 2013-02-13 | 北汽福田汽车股份有限公司 | Stepless speed change mechanism and automobile |
| CN104386201A (en) * | 2014-11-12 | 2015-03-04 | 浙江科技学院 | Friction wheel transmission stepless transmission bicycle |
| CN105881210A (en) * | 2016-05-18 | 2016-08-24 | 同济大学 | Automatic stepless speed change device used for transmission of rotary tool and using method of automatic stepless speed change device |
| CN207534613U (en) * | 2017-11-06 | 2018-06-26 | 浙江工业大学 | A kind of grinding and polishing device with stepless shift function |
| CN212414153U (en) * | 2020-05-25 | 2021-01-29 | 刘万强 | Agricultural irrigation device |
| CN112757141A (en) * | 2021-01-07 | 2021-05-07 | 丁汉瑞 | Hardware mechanical energy-saving polishing device capable of avoiding dust from influencing polishing effect |
-
2021
- 2021-06-22 CN CN202110689285.4A patent/CN113400107A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927225A (en) * | 2011-08-10 | 2013-02-13 | 北汽福田汽车股份有限公司 | Stepless speed change mechanism and automobile |
| CN104386201A (en) * | 2014-11-12 | 2015-03-04 | 浙江科技学院 | Friction wheel transmission stepless transmission bicycle |
| CN105881210A (en) * | 2016-05-18 | 2016-08-24 | 同济大学 | Automatic stepless speed change device used for transmission of rotary tool and using method of automatic stepless speed change device |
| CN207534613U (en) * | 2017-11-06 | 2018-06-26 | 浙江工业大学 | A kind of grinding and polishing device with stepless shift function |
| CN212414153U (en) * | 2020-05-25 | 2021-01-29 | 刘万强 | Agricultural irrigation device |
| CN112757141A (en) * | 2021-01-07 | 2021-05-07 | 丁汉瑞 | Hardware mechanical energy-saving polishing device capable of avoiding dust from influencing polishing effect |
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Application publication date: 20210917 |