CN212885369U - Labor-saving aviation scissors - Google Patents
Labor-saving aviation scissors Download PDFInfo
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- CN212885369U CN212885369U CN202021894871.XU CN202021894871U CN212885369U CN 212885369 U CN212885369 U CN 212885369U CN 202021894871 U CN202021894871 U CN 202021894871U CN 212885369 U CN212885369 U CN 212885369U
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- pin shaft
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- connecting rod
- side pin
- gear
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Abstract
The utility model relates to a labor-saving aviation scissors, which comprises a first scissors head, a second scissors head and two grab handles; the middle part of the first scissor head is a first pivoting part, one end of the first scissor head is a first knife head, and the other end of the first scissor head is a first knife handle; the middle part of the second scissor head is a second pivot part, one end of the second scissor head is a second knife head, and the other end of the second scissor head is a second knife handle; the first pin joint part is rotatably connected with the second pin joint part through a main pin shaft, the first cutter handle is hinged with one grab handle through a first side pin shaft, the second cutter handle is hinged with the middle part of one connecting rod through a second side pin shaft, one end of the connecting rod is hinged with the other grab handle through a third side pin shaft, the first side pin shaft and the third side pin shaft are both positioned below the auxiliary pin shaft, a connecting hole is formed in one end, connected with the grab handle, of the connecting rod, the other end of the connecting rod extends to the first pin joint part in the direction of the main pin shaft, a first gear is arranged at the end part of the connecting rod, the first pin joint part is provided with a second gear meshed with the first gear, and the reference circle radius of the.
Description
Technical Field
The utility model relates to a laborsaving aviation is cut.
Background
The cutter head of the aviation scissors is made of alloy steel and has extremely high hardness and strength, so the aviation scissors are often used for cutting iron sheets and plastics, and although the cutter head of the aviation scissors is strong and cannot be damaged by the iron sheets and the plastics, the lever ratio of a power arm and a resistance arm is limited due to the small size of the aviation scissors, so that the aviation scissors are still very labor-consuming in cutting the iron sheets.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the labor-saving aviation shears can change the lever ratio in the shearing process.
In order to solve the technical problem, the utility model discloses a technical scheme is: the labor-saving aviation scissors comprise a first scissors head and a second scissors head which are mutually hinged in a cross way, and two grab handles with the top ends mutually hinged through an auxiliary pin shaft; the middle part of the first scissor head is a first pivoting part, one end of the first scissor head is a first knife head, and the other end of the first scissor head is a first knife handle; the middle part of the second scissor head is a second pivot part, one end of the second scissor head is a second knife head, and the other end of the second scissor head is a second knife handle; the first pivoting part and the second pivoting part are overlapped and rotatably connected through a main pin shaft, the first cutter head and the second cutter head are oppositely arranged to form a shearing opening, the free end of the first cutter handle is hinged with one grab handle through a first side pin shaft, the free end of the second cutter handle is hinged in the middle of a connecting rod through a second side pin shaft, the connecting rod is L-shaped, the second side pin shaft is arranged at the bending part of the connecting rod, one end of the connecting rod is hinged with the other grab handle through a third side pin shaft, the first side pin shaft and the third side pin shaft are both positioned below the auxiliary pin shaft, one end of the connecting rod connected with the grab handle is provided with a connecting hole, the other end of the connecting rod extends to the first pivoting part towards the main pin shaft direction and is provided with a first gear at the end part of the connecting rod, the edge of the first pivoting part close to the end part of the connecting rod is provided with a second, the axis of the main pin shaft is the center of a reference circle of the second gear, and the radius of the reference circle of the first gear is larger than that of the reference circle of the second gear.
As a preferred scheme, the first side pin shaft is further hinged with a lock hook, one end of the third side pin shaft extends outwards to form a lock cylinder corresponding to the lock hook, the lock hook is provided with a lock connecting groove matched with the lock cylinder, and when the two handles are close to each other, the lock hook is rotated to enable the lock cylinder to be embedded into the lock connecting groove, so that the two handles are mutually locked.
The utility model has the advantages that: the utility model discloses the turned angle when utilizing first gear and second gear meshing to rotate is poor, makes the connecting rod rotate for the second handle of a knife to change the contained angle that second handle of a knife and connecting rod are located second side round pin axle below part and form, change the distance between third side round pin axle and the swizzle axle with this, the length of substantial change scissors power arm, thereby change the lever ratio of scissors power arm and resistance arm.
Drawings
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of a connecting rod configuration;
in fig. 1 and 2: 1. the scissors comprise a first scissor head, 101, a first pivoting part, 102, a first knife head, 103, a first knife handle, 2, a second scissor head, 201, a second pivoting part, 202, a second knife head, 203, a second knife handle, 3, an auxiliary pin shaft, 4, a grab handle, 5, a main pin shaft, 6, a first side pin shaft, 7, a second side pin shaft, 8, a connecting rod, 9, a third side pin shaft, 10, a connecting hole, 11, a first gear, 12, a second gear, 13, a latch hook, 14, a lock column, 15 and a locking groove.
Detailed Description
The following describes in detail a specific embodiment of the present invention with reference to the drawings.
As shown in fig. 1 and 2, the labor-saving aviation scissors comprise a first scissors head 1 and a second scissors head 2 which are mutually hinged in a cross way, and two grab handles 4 of which the top ends are mutually hinged through an auxiliary pin shaft 3; the middle part of the first scissor head 1 is provided with a first pivoting part 101, one end of the first scissor head is provided with a first scissor head 102, and the other end of the first scissor head is provided with a first scissor handle 103; the middle part of the second scissor head 2 is a second pivoting part 201, one end is a second scissor head 202, and the other end is a second knife handle 203; the first pivoting part 101 and the second pivoting part 201 are overlapped and rotatably connected through a main pin shaft 5, the first cutter head 102 and the second cutter head 202 are oppositely arranged to form a shear port, the free end of the first cutter handle 103 is hinged with one grab handle 4 through a first side pin shaft 6, the free end of the second cutter handle 203 is hinged at the middle part of a connecting rod 8 through a second side pin shaft 7, one end of the connecting rod 8 is hinged with the other grab handle 4 through a third side pin shaft 9, the first side pin shaft 6 and the third side pin shaft 9 are both positioned below the auxiliary pin shaft 3, one end of the connecting rod 8 connected with the grab handle 4 is provided with a connecting hole 10, the other end of the connecting rod 8 extends to the first pivoting part 101 towards the main pin shaft 5 direction and is provided with a first gear 11 at the end part of the connecting rod 8, the edge of the first pivoting part 101 close to the end part of the connecting rod 8 is provided with a second gear 12 meshed with the first gear 11, the axis, the axis of the main pin shaft 5 is the center of a reference circle of the second gear 12, and the radius of the reference circle of the first gear 11 is larger than that of the reference circle of the second gear 12.
In this embodiment, the first side pin shaft 6 is further hinged with a locking hook 13, one end of the third side pin shaft 9 extends outwards to form a locking column 14 corresponding to the locking hook 13, the locking hook 13 is provided with a locking groove 15 matched with the locking column 14, when the two handles 4 are close to each other, the locking hook 13 is rotated to enable the locking column 14 to be embedded into the locking groove 15, the two handles 4 are locked with each other and cannot be automatically opened, and the two handles 4 can be opened only after the locking hook 13 is rotated to enable the locking column 14 to be separated from the locking groove 15.
In the embodiment, as shown in fig. 2, the link is L-shaped, and the second side pin 7 is disposed at the bending position of the link 8.
The utility model discloses the theory of operation is: as shown in fig. 1, when the aerial shears of the present invention are in a closed state, the second handle 203 and the portion of the connecting rod 8 located below the second side pin 7 form an obtuse angle, when the first cutting head 102 and the second cutting head 202 of the aerial shears are gradually separated, the first gear 11 and the second gear 12 rotate relatively, because the radius of the reference circle of the first gear is greater than the radius of the reference circle of the second gear 12, the rotation angle of the first gear 11 is smaller than the rotation angle of the second gear 12, and the rotation of the second side pin 7 rotates along with the rotation of the second handle 203, which results in the rotation angle of the second side pin 7 being greater than the rotation angle of the first gear 11, thereby causing the connecting rod 8 to rotate relative to the second handle 203, so that the obtuse angle formed by the second handle 203 and the portion of the connecting rod 8 located below the second side pin 7 is gradually increased, and further increasing the distance between the third side pin 9 and the main pin 5, when the opening angles of the first cutter head 102 and the second cutter head 202 are the largest, the distance between the third side pin shaft 9 and the main pin shaft 5 is the largest, for the first scissor head 1 and the second scissor head 2, the distance between the third side pin shaft 9 and the main pin shaft 5 is the power arm, the distance between a shearing object positioned between the first cutter head 102 and the second cutter head 202 and the main pin shaft 5 is the resistance arm, when the opening angles of the first cutter head 102 and the second cutter head 202 are the largest, the distance between the third side pin shaft 9 and the main pin shaft 5 is the largest, namely the power arm is the largest, the shearing is most labor-saving, and in the shearing process, as the first cutter head 102 and the second cutter head 202 gradually approach, the distance between the third side pin shaft 9 and the main pin shaft 5 gradually decreases, and the power arm also gradually decreases.
It is visible, aviation scissors, at the shearing initial stage, have the biggest power arm to it is more laborsaving to make the shearing.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (2)
1. The labor-saving aviation scissors comprise a first scissors head (1) and a second scissors head (2) which are mutually hinged in a cross way, and two grab handles (4) with the top ends mutually hinged through an auxiliary pin shaft (3); the middle part of the first scissor head (1) is provided with a first pivoting part (101), one end of the first scissor head is provided with a first knife head (102), and the other end of the first scissor head is provided with a first knife handle (103); the middle part of the second scissor head (2) is provided with a second pivoting part (201), one end of the second scissor head is provided with a second knife head (202), and the other end of the second scissor head is provided with a second knife handle (203); the cutter is characterized in that the free end of a first cutter handle (103) is hinged with one grab handle (4) through a first side pin shaft (6), the free end of a second cutter handle (203) is hinged in the middle of one connecting rod (8) through a second side pin shaft (7), the connecting rod is L-shaped, the second side pin shaft (7) is arranged at the bending position of the connecting rod (8), one end of the connecting rod (8) is hinged with the other grab handle (4) through a third side pin shaft (9), the first side pin shaft (6) and the third side pin shaft (9) are both located below the auxiliary pin shaft (3), a connecting hole (10) is formed in one end, connected with the connecting rod (8), of the connecting rod (8), and the other end of the connecting rod (8) extends to the first pivoting part (101) in the direction of the main pin shaft (5) and is provided with a first tooth (8) at the end part of the connecting rod (8) The edge of the first pivoting part (101) close to the end part of the connecting rod (8) is provided with a second gear (12) meshed with the first gear (11), the axis of the second side pin shaft (7) is the center of a reference circle of the first gear (11), the axis of the main pin shaft (5) is the center of a reference circle of the second gear (12), and the radius of the reference circle of the first gear (11) is larger than that of the second gear (12).
2. The labor-saving aviation scissors according to claim 1, wherein the first side pin shaft (6) is further hinged with a locking hook (13), one end of the third side pin shaft (9) extends outwards to form a locking column (14) corresponding to the locking hook (13), the locking hook (13) is provided with a locking groove (15) matched with the locking column (14), and when the two handles (4) are close to each other, the locking hook (13) is rotated to enable the locking column (14) to be embedded into the locking groove (15), so that the two handles (4) are locked with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021894871.XU CN212885369U (en) | 2020-09-02 | 2020-09-02 | Labor-saving aviation scissors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021894871.XU CN212885369U (en) | 2020-09-02 | 2020-09-02 | Labor-saving aviation scissors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212885369U true CN212885369U (en) | 2021-04-06 |
Family
ID=75255124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021894871.XU Active CN212885369U (en) | 2020-09-02 | 2020-09-02 | Labor-saving aviation scissors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212885369U (en) |
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2020
- 2020-09-02 CN CN202021894871.XU patent/CN212885369U/en active Active
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