CN114799338A - 360-degree constant-value torsion saw bow - Google Patents
360-degree constant-value torsion saw bow Download PDFInfo
- Publication number
- CN114799338A CN114799338A CN202210586534.1A CN202210586534A CN114799338A CN 114799338 A CN114799338 A CN 114799338A CN 202210586534 A CN202210586534 A CN 202210586534A CN 114799338 A CN114799338 A CN 114799338A
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- Prior art keywords
- pull rod
- jacking
- movable
- pawl
- constant
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- 238000003825 pressing Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
- B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
- B23D49/12—Hacksaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
- B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
- B23D51/10—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for hand-held or hand-operated devices
Abstract
The invention discloses a 360-degree constant-value torque saw bow, which comprises: the device comprises a constant value torsion device, a first movable pull rod, a first fixed pull rod, a second fixed pull rod, a saw bow handle, a ratchet device, a saw blade and a second movable pull rod, wherein the ratchet device comprises a front cover, a rear cover, a ratchet wheel and a pawl, and the front cover and the rear cover are fixedly connected with the second fixed pull rod; the constant value torsion device comprises a movable sleeve and a jacking sleeve. The saw blade can be controlled within a reasonable tightness range by easily adjusting the torque force. Unnecessary damage to the saw blade caused by improper tightness is greatly reduced, unnecessary fund consumption of the saw blade in the aspect is also reduced, angle conversion can be realized only by slightly pulling the movable swing rod, and the time required for replacement originally is saved.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a 360-degree constant-value torsion saw bow.
Background
Bench workers are very important in machining. With the rapid development of equipment manufacturing industry in China and the wide application of high-end precision manufacturing technology, the benchwork has higher and higher status in the manufacturing industry due to the advantages of flexible processing, complex processing shape, high precision parts, small investment and the like. Sawing is one of the basic skills of a bench worker, and the quality and speed of sawing directly influence the subsequent processing and quality of products.
The sawing tool is a saw bow, and the existing saw bow has the following defects:
(1) the tightness degree of the saw blade is inconvenient to adjust. The saw blade is fixed by a fixed chuck at the far end and a movable chuck close to the handle of the saw bow, and the tensioning degree of the saw blade is mainly completed by screwing an adjusting knob close to the handle. The degree of tightness of the saw blade should be appropriate and should generally be adjusted accordingly depending on the material and size of the workpiece being sawn. The saw blade is twisted due to the over-loose saw blade, the saw slot is inclined, and the saw blade is easy to break; if the saw blade is too tight, the proper elasticity is lost, and the saw blade is easy to break, so that beginners cannot master the adjusting skill.
(2) The angle of the saw blade is inconvenient to adjust. Different angles are often required to be adjusted according to the structure of a workpiece during sawing, the existing bow structure can be adjusted to be 0 degree or 90 degrees only, when the workpiece is in a place with poor conditions, sawing is inconvenient, and the saw blade and square tenons at two ends need to be detached and reinstalled during angle adjustment, so that time and labor are wasted, and the work efficiency is reduced.
Therefore, we propose a 360 ° constant torque bow to solve the above mentioned problems.
Disclosure of Invention
The present invention is directed to a 360 ° constant torque saw bow, which solves the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: a 360 ° constant torque saw bow comprising: the device comprises a fixed value torsion device, a first movable pull rod, a first fixed pull rod, a second fixed pull rod, a bow handle, a ratchet device, a saw blade and a second movable pull rod, wherein the ratchet device comprises a front cover, a rear cover, a ratchet wheel and a pawl;
a non-return pawl and a pawl are symmetrically arranged below the ratchet wheel, the non-return pawl and the pawl are respectively clamped with a rack of the ratchet wheel, the non-return pawl and the pawl are both connected with springs, the springs are fixedly connected with the rear cover, a handle is arranged between the non-return pawl and the pawl, and a cam is arranged on the handle;
the fixed value torsion device comprises a movable sleeve and a jacking sleeve, the movable sleeve is in threaded rotation connection with the jacking sleeve, a jacking steel ball is arranged in the jacking sleeve, a rear jacking pressing plate II is arranged on the left side of the jacking steel ball, a jacking spring is arranged on the left side of the jacking pressing plate II, the jacking spring is located in the movable sleeve, a jacking pressing plate I is arranged on the left side of the jacking spring, the jacking pressing plate I is fixedly connected with a fixed plate, the fixed plate is fixedly installed on the left portion of the movable sleeve through a screw II, and the jacking sleeve is fixedly installed on the square tenon of the ratchet device on the left portion.
Preferably, the saw bow handle is fixedly connected with a first fixed pull rod, and the lower end of the right part of the first fixed pull rod is fixedly connected with a second fixed pull rod.
Preferably, a first movable pull rod is installed at the front end of the first fixed pull rod in a positioning mode, and a first screw is arranged at the joint of the first movable pull rod and the first fixed pull rod.
Preferably, the lower ends of the first movable pull rod and the second fixed pull rod are both provided with ratchet wheel devices, and the ratchet wheel device at the left part is provided with the second movable pull rod.
Preferably, a saw blade is arranged between the two movable pull rods, and a constant value torsion device is installed on the ratchet wheel device at the left part.
Preferably, the square tenon is provided with a pin, and the pin is inserted into the mounting hole of the saw blade.
Preferably, the front cover and the rear cover are fixedly connected through a screw III.
Compared with the prior art, the invention has the beneficial effects that:
1. design optimization of definite value torsion overload prevention device for bow itself is because of unable rational regulation elasticity degree, and then the saw blade distortion that leads to, and the saw gap is crooked, the saw blade collapses disconnected scheduling problem and inconvenience easily and obtains improving, just can control the saw blade at reasonable elasticity scope through easily adjusting torsion size. Unnecessary damage to the saw blade caused by improper tightness is greatly reduced, and unnecessary fund consumption of the saw blade in the aspect is also reduced;
2. the design optimization of the ratchet wheel structure breaks through the original angle limitation of the saw bow structure, and the full-angle rotation of 0-360 degrees is realized, so that the saw blade can meet the angle requirement when sawing at any angle. Meanwhile, due to the design of the ratchet wheel structure, the saw bow is prevented from being replaced and disassembled due to the special angle, the angle can be changed by slightly pulling the movable swing rod, and the time required to be replaced originally is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of FIG. 2 at B in the present invention;
FIG. 5 is a schematic view of the ratchet device of the present invention.
In the figure: 1. a movable sleeve; 2. tightly jacking the sleeve; 3. a first movable pull rod; 4. a first screw; 5. fixing a first pull rod; 6. fixing a pull rod II; 7. a saw bow handle; 8. a ratchet gear; 9. a saw blade; 10. a second movable pull rod; 11. a fixing plate; 12. a second screw; 13. the first pressing plate is tightly pressed; 14. the spring is tightly propped; 15. pressing the second pressing plate tightly; 16. tightly pushing the steel ball; 17. a rear cover; 18. a ratchet wheel; 19. a cam; 20. a front cover; 21. a square tenon; 22. a pin; 23. a spring; 24. a non-return pawl; 25. a pawl; 26. a third screw; 27. a handle.
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. 1-5, the present invention provides a technical solution: a 360 ° constant torque saw bow comprising: the device comprises a fixed value torsion device, a first movable pull rod 3, a first fixed pull rod 5, a second fixed pull rod 6, a bow handle 7, a ratchet device 8, a saw blade 9 and a second movable pull rod 10, wherein the first fixed pull rod 5 is fixedly connected to the bow handle 7, the second fixed pull rod 6 is fixedly connected to the lower end of the right part of the first fixed pull rod 5, the first movable pull rod 3 is fixedly arranged at the front end of the first fixed pull rod 5, a first screw 4 is arranged at the joint of the first movable pull rod 3 and the first fixed pull rod 5, and the relative retraction distance between the first movable pull rod 3 and the first fixed pull rod 5 is fixed through the positioning of the first screw 4;
ratchet wheel devices 8 are mounted at the lower ends of the first movable pull rod 3 and the second fixed pull rod 6, a second movable pull rod 10 is mounted on the ratchet wheel device 8 at the left part, a saw blade 9 is arranged between the second movable pull rods 10, and a constant value torsion device is mounted on the ratchet wheel device 8 at the left part;
the ratchet wheel device 8 comprises a front cover 20, a rear cover 17, a ratchet wheel 18 and a pawl 25, the front cover 20 and the rear cover 17 are fixedly connected through a third screw 26, the front cover 20 and the rear cover 17 are fixedly connected with a second fixed pull rod 6, the ratchet wheel 18 is clamped between the front cover 20 and the rear cover 17, the ratchet wheel 18 is rotatably connected with the front cover 20 and the rear cover 17, a square tenon 21 is installed in the ratchet wheel 18, a pin 22 is installed on the square tenon 21, and the pin 22 is inserted into a mounting hole of the saw blade 9;
a non-return pawl 24 and a pawl 25 are symmetrically arranged below the ratchet wheel 18, the non-return pawl 24 and the pawl 25 are respectively clamped with a rack of the ratchet wheel 18, the non-return pawl 24 and the pawl 25 are both connected with a spring 23, the spring 23 is fixedly connected with the rear cover 17, a handle 27 is arranged between the non-return pawl 24 and the pawl 25, and a cam 19 is arranged on the handle 27;
when the handle 27 is pulled rightwards, the cam 19 is driven to rotate anticlockwise, the right pawl 25 rotates clockwise, the right pawl 25 leaves the ratchet wheel 18, the right spring 23 is kept in a compressed state, the left contour of the cam 19 is attached to the left non-return pawl 24, the left spring 23 is kept in the original position, the left non-return pawl 24 is tightly attached to the ratchet wheel 18, the ratchet wheel 18 can be limited to rotate anticlockwise, the square tenons 21 at the two end parts of the saw bow are rotated clockwise, the ratchet wheel 18 can be driven to rotate by a required angle, and the saw blade 9 connected with the square tenons 21 also rotates clockwise by a corresponding angle;
when the handle 27 is pulled leftwards, the cam 19 is driven to rotate clockwise, the left non-return pawl 24 rotates anticlockwise, the left non-return pawl 24 leaves the ratchet wheel 18, and the left spring 23 is kept in a compressed state; at the moment, the right contour of the cam 19 is attached to the right pawl 25, the right spring 23 keeps the original position, and the right pawl 25 is attached to the ratchet wheel 18 tightly to limit the ratchet wheel 18 to rotate clockwise; the square tenons 21 at the two end parts of the saw bow are rotated anticlockwise, so that the ratchet wheel 18 can be driven to rotate by a required angle, and the saw blade 9 connected with the square tenons 21 also rotates anticlockwise by a corresponding angle;
the constant value torsion device comprises a movable sleeve 1 and a jacking sleeve 2, the movable sleeve 1 is in threaded rotary connection with the jacking sleeve 2, a jacking steel ball 16 is arranged in the jacking sleeve 2, a rear jacking pressing plate II 15 is arranged on the left side of the jacking steel ball 16, a jacking spring 14 is arranged on the left side of the jacking pressing plate II 15, the jacking spring 14 is located in the movable sleeve 1, a jacking pressing plate I13 is arranged on the left side of the jacking spring 14, the jacking pressing plate I13 is fixedly connected with a fixed plate 11, the fixed plate 11 is fixedly installed with the left part of the movable sleeve 1 through a screw II 12, and the jacking sleeve 2 is fixedly installed with a square tenon 21 of a ratchet device 8 at the left part;
when the device works, a torsion value is set according to the force required by the size of a sawed material and the tightness degree of a saw blade 9, then the movable sleeve 1 is rotated to push the first jacking pressing plate 13 and the second jacking pressing plate 15 to move axially, further the jacking spring 14 and the jacking steel ball 16 are compressed, the friction force between the jacking steel ball 16 and the second jacking pressing plate 15 is increased, the compression force of the jacking spring 14 is converted into torsion, the rotating distance of the movable sleeve 1 and the torsion of the jacking spring 14 form a certain proportion, the torsion is controlled by controlling the torsion process of the movable sleeve 1, and the constant value torsion is realized;
when the torque force of the jacking sleeve 2 reaches the torque force value set by the movable sleeve 1, the jacking steel balls 16 can force the jacking sleeve 2 to realize slipping and stop rotating, the tightness degree of the saw blade 9 is in the torque force range set by the movable sleeve 1 at the moment, the overload prevention effect is achieved, and after the saw blade 9 is locked, the constant value torque device can be taken down so as to facilitate sawing.
Those not described in detail in this specification are within the skill of the art.
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 (7)
1. A 360 ° constant torque bow, comprising: the device comprises a constant value torsion device, a first movable pull rod (3), a first fixed pull rod (5), a second fixed pull rod (6), a bow handle (7), a ratchet device (8), a saw blade (9) and a second movable pull rod (10), wherein the ratchet device (8) comprises a front cover (20), a rear cover (17), a ratchet wheel (18) and a pawl (25), the front cover (20) and the rear cover (17) are fixedly connected with the second fixed pull rod (6), the ratchet wheel (18) is clamped between the front cover (20) and the rear cover (17), the ratchet wheel (18) is rotatably connected with the front cover (20) and the rear cover (17), and a square tenon (21) is arranged in the ratchet wheel (18);
a non-return pawl (24) and a pawl (25) are symmetrically arranged below the ratchet wheel (18), the non-return pawl (24) and the pawl (25) are respectively clamped with a rack of the ratchet wheel (18), both the non-return pawl (24) and the pawl (25) are connected with a spring (23), the spring (23) is fixedly connected with the rear cover (17), a handle (27) is arranged between the non-return pawl (24) and the pawl (25), and a cam (19) is arranged on the handle (27);
the constant value torsion device comprises a movable sleeve (1) and a jacking sleeve (2), wherein the movable sleeve (1) is in threaded rotation connection with the jacking sleeve (2), a jacking steel ball (16) is arranged in the jacking sleeve (2), a rear jacking pressing plate II (15) is arranged on the left side of the jacking steel ball (16), a jacking spring (14) is arranged on the left side of the jacking pressing plate II (15), the jacking spring (14) is located in the movable sleeve (1), a jacking pressing plate I (13) is arranged on the left side of the jacking spring (14), the jacking pressing plate I (13) is fixedly connected with a fixed plate (11), the fixed plate (11) is fixedly installed on the left portion of the movable sleeve (1) through a screw II (12), and the jacking sleeve (2) is fixedly installed on the square tenon (21) of a ratchet device (8) on the left portion.
2. A360 DEG constant-torque hacksaw according to claim 1, wherein the hacksaw handle (7) is fixedly connected with a first fixed pull rod (5), and the lower end of the right part of the first fixed pull rod (5) is fixedly connected with a second fixed pull rod (6).
3. The 360-degree constant-torque saw bow as claimed in claim 2, wherein a movable pull rod I (3) is fixedly mounted at the front end of the fixed pull rod I (5), and a screw I (4) is arranged at the joint of the movable pull rod I (3) and the fixed pull rod I (5).
4. A360 DEG constant-torque saw bow according to claim 3, wherein the lower ends of the first movable pull rod (3) and the second fixed pull rod (6) are both provided with a ratchet device (8), and the left ratchet device (8) is provided with a second movable pull rod (10).
5. A360 DEG constant-torque saw bow according to claim 4, wherein a saw blade (9) is arranged between the two movable pull rods (10), and a constant-torque device is arranged on the ratchet wheel device (8) at the left part.
6. A 360 ° constant torque bow according to claim 1, wherein the square tenon (21) is provided with a pin (22), and the pin (22) is inserted into a mounting hole of the saw blade (9).
7. A 360 ° constant torque bow according to claim 1, wherein the front cover (20) and the rear cover (17) are fixedly connected by means of screws three (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586534.1A CN114799338B (en) | 2022-05-27 | 2022-05-27 | 360-degree constant-value torsion saw bow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586534.1A CN114799338B (en) | 2022-05-27 | 2022-05-27 | 360-degree constant-value torsion saw bow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114799338A true CN114799338A (en) | 2022-07-29 |
| CN114799338B CN114799338B (en) | 2023-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210586534.1A Active CN114799338B (en) | 2022-05-27 | 2022-05-27 | 360-degree constant-value torsion saw bow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114799338B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3004830U (en) * | 1994-05-31 | 1994-11-29 | 純瓊 陳 | Bow blade angle adjustment device |
| DE20002749U1 (en) * | 2000-02-15 | 2000-04-20 | Lin Kun Meng | Hacksaw |
| KR20010050430A (en) * | 2000-09-09 | 2001-06-15 | 지문수 | hand steel saw frame system and metode |
| DE20217051U1 (en) * | 2002-10-21 | 2003-01-02 | Chen Chun Chiung | bucksaw |
| CN1597210A (en) * | 2004-09-28 | 2005-03-23 | 邬贤波 | Hand saw capable of light guiding orientation cutting |
| DE202007015510U1 (en) * | 2007-11-07 | 2008-04-03 | Chen, Teng-Lung, Wu-Jih | hacksaw |
| CA2651622A1 (en) * | 2008-08-05 | 2010-02-05 | The Stanley Works | Saw blade handle with replaceable blades |
| CN203578930U (en) * | 2013-11-25 | 2014-05-07 | 刘金承 | Circular arc saw |
| CN209223287U (en) * | 2018-12-13 | 2019-08-09 | 郑州元素工具技术有限公司 | A kind of diamond wire hand saws |
-
2022
- 2022-05-27 CN CN202210586534.1A patent/CN114799338B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3004830U (en) * | 1994-05-31 | 1994-11-29 | 純瓊 陳 | Bow blade angle adjustment device |
| DE20002749U1 (en) * | 2000-02-15 | 2000-04-20 | Lin Kun Meng | Hacksaw |
| KR20010050430A (en) * | 2000-09-09 | 2001-06-15 | 지문수 | hand steel saw frame system and metode |
| DE20217051U1 (en) * | 2002-10-21 | 2003-01-02 | Chen Chun Chiung | bucksaw |
| CN1597210A (en) * | 2004-09-28 | 2005-03-23 | 邬贤波 | Hand saw capable of light guiding orientation cutting |
| DE202007015510U1 (en) * | 2007-11-07 | 2008-04-03 | Chen, Teng-Lung, Wu-Jih | hacksaw |
| CA2651622A1 (en) * | 2008-08-05 | 2010-02-05 | The Stanley Works | Saw blade handle with replaceable blades |
| CN203578930U (en) * | 2013-11-25 | 2014-05-07 | 刘金承 | Circular arc saw |
| CN209223287U (en) * | 2018-12-13 | 2019-08-09 | 郑州元素工具技术有限公司 | A kind of diamond wire hand saws |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114799338B (en) | 2023-11-28 |
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