CN210500004U

CN210500004U - Press-rotating screwdriver

Info

Publication number: CN210500004U
Application number: CN201921514260.5U
Authority: CN
Inventors: 祁雁英; 蔡忠侯; 钟志贤
Original assignee: Guilin University of Technology
Current assignee: Guilin University of Technology
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-05-12
Anticipated expiration: 2029-09-12

Abstract

The utility model relates to a press-rotating screwdriver, which comprises an upper screwdriver handle, a lower screwdriver handle and a screwdriver head, wherein the upper screwdriver handle is sleeved outside the upper part of the lower screwdriver handle in a sliding way and is internally provided with a first transverse plate, the first transverse plate is vertical to the sliding direction of the upper screwdriver handle, and the middle part of the upper screwdriver handle is provided with an opening; an upper transmission rod, a first reset spring, a boss, a limiting pawl, a second reset spring, a first gear, two middle bevel gears, a transmission bevel gear, a lower transmission rod, a first transmission pawl, a second transmission pawl and a third reset spring are arranged in the lower knife handle. The utility model discloses a press and change screwdriver can become directional left rotation or right rotary motion toward reverse linear motion, and can realize screwing or loosening of various screws by the efficient, and after the screw quantity that needs to be twisted becomes more, can save down a large amount of time and make loaded down with trivial details work become simple, and then improve work efficiency.

Description

Press-rotating screwdriver

Technical Field

The utility model relates to a screwdriver technical field, in particular to press and change screwdriver.

Background

In daily life or work, various small screws are usually required to be screwed. Although this is a simple work, the simple work becomes cumbersome when the number of screws to be screwed becomes large. The existing screwdrivers on the market are mainly divided into two types, namely an electric screwdriver and a non-electric screwdriver. The electric screwdriver is internally provided with the motor, can convert electric energy into mechanical rotary motion so as to quickly and efficiently realize the screwing or unscrewing of screws, but is higher in price and needs to be repeatedly charged or used for finding a power supply. The non-electric screwdriver can screw or unscrew the screw in a hand screwing mode, is convenient to use and low in price, but has low efficiency.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a crimping screwdriver to change a reciprocating linear motion into a directional left or right rotational motion.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

a press-rotating screwdriver comprises an upper screwdriver handle, a lower screwdriver handle and a screwdriver head, wherein the upper screwdriver handle is slidably sleeved on the outer side of the upper part of the lower screwdriver handle and is internally provided with a first transverse plate, the first transverse plate is vertical to the sliding direction of the upper screwdriver handle, and the middle part of the first transverse plate is provided with a through hole; an upper transmission rod, a first reset spring, a boss, a limiting pawl, a second reset spring, a first gear, two middle bevel gears, a transmission bevel gear, a lower transmission rod, a first transmission pawl, a second transmission pawl and a third reset spring are arranged in the lower knife handle;

the outer part of the upper transmission rod is sleeved with a first reset spring, two ends of the first reset spring are respectively abutted against a first transverse plate and a boss, the upper transmission rod is spiral, the size of the cross section parallel to the through opening is slightly smaller than the size of the opening of the through opening, one end of the upper transmission rod movably penetrates through the through opening and extends to the position right above the lower knife handle, the other end of the upper transmission rod is fixedly connected with the boss, the top surface edge of the boss is provided with a notch, the notch does not penetrate through the bottom surface of the boss, the limiting pawl and a second reset spring are arranged on the notch, the pawl part of the limiting pawl extends out of the notch, one end of the second reset spring is fixedly connected with the boss, and the other end of the second reset spring;

the first gear is rotationally connected with the inner wall of the upper part of the lower cutter handle, the top surface of the first gear is provided with a stepped groove which penetrates through the bottom surface of the first gear, the end with the larger cross section of the stepped groove is arranged on the upper part, the inner wall of the end is provided with a first tooth-shaped structure, the boss is embedded in the stepped groove, and the claw part of the limiting pawl on the boss is meshed and connected with the first tooth-shaped structure under the action of a second reset spring; a second tooth-shaped structure is arranged on the inner wall of one end of the stepped groove with the smaller cross section, and a gap is formed between the second tooth-shaped structure and the stepped surface of the stepped groove as well as between the second tooth-shaped structure and the bottom surface of the boss; the periphery of the bottom surface of the first gear is provided with a conical tooth-shaped structure, and is respectively engaged and connected with two intermediate bevel gears through the conical tooth-shaped structure, the two intermediate bevel gears are respectively arranged at two sides of the second tooth-shaped structure and are both engaged and connected with the transmission bevel gear, and the transmission bevel gear is movably arranged in the lower tool handle;

one end of the lower transmission rod is inserted into the stepped groove from the bottom of the first gear in a sliding manner, a second gear which is matched and meshed with the second tooth-shaped structure is arranged at the one end of the lower transmission rod, the thickness of the second gear is not more than the distance between the second tooth-shaped structure and the bottom surface of the boss, and the other end of the lower transmission rod penetrates through the transmission bevel gear and the bottom of the lower tool shank in sequence, extends to the outer side of the lower tool shank and is connected with the screwdriver head; the lower transmission rod is in key connection with the transmission bevel gear, a third tooth-shaped structure is arranged on a rod body between the transmission bevel gear and the screwdriver head, the two opposite sides of the third tooth-shaped structure are respectively connected with a first transmission pawl and a second transmission pawl in a meshing mode, the first transmission pawl and the second transmission pawl are both in rotating connection with the inner wall of the lower cutter handle, a rotating axis is horizontally arranged, the claw part of the first transmission pawl is in meshing connection with the third tooth-shaped structure from bottom to top in an inclined mode, and the claw part of the second transmission pawl is in meshing connection with the third tooth-shaped structure from top to bottom in an inclined mode; the first transmission pawl and the second transmission pawl are both matched with a third reset spring, one end of the first reset spring is connected with the lower tool handle, the other end of the first reset spring is abutted against the first transmission pawl and the second transmission pawl, the third reset spring abutted against the first transmission pawl is abutted against the first transmission pawl from top to bottom, the third reset spring abutted against the second transmission pawl is abutted against the second transmission pawl from bottom to top, and the elastic force directions of the third reset spring form an angle with the first transmission pawl and the second transmission pawl; the first transmission pawl and the second transmission pawl are matched with guide openings, the guide openings are formed in the wall of the lower knife handle, are formed in the length direction of the lower knife handle, and are opposite to the claw portions of the first transmission pawl and the second transmission pawl.

Preferably, notches are formed in two opposite sides of the boss.

Preferably, a convex edge is arranged in the middle of the outer side wall of the first gear, and the first gear is rotatably installed in an installation groove in the inner wall of the lower tool shank through the convex edge.

Preferably, the rotation axes of the intermediate bevel gear and the transmission bevel gear are vertically arranged.

Preferably, the two intermediate bevel gears are symmetrically arranged relative to the lower transmission rod.

Preferably, the inside of lower handle of a knife is provided with the second diaphragm, the second diaphragm is worn to establish by the transfer line slip, third profile of tooth structure sets up between second diaphragm and screwdriver head, transmission bevel gear sets up between second diaphragm and first gear, there is the interval with the second diaphragm when transmission bevel gear meshing intermediate bevel gear, this spaced distance is not more than the thickness of second gear.

Preferably, the claw of the first driving pawl is remote from the screwdriver bit with respect to the claw of the second driving pawl.

Preferably, the first transmission pawl is matched with two guide ports which are respectively arranged on two opposite sides of the lower tool handle and are opposite to each other; the second transmission pawl is also matched with two guide ports which are respectively arranged on two opposite sides of the lower knife handle and are opposite to each other.

Preferably, the screwdriver head is detachably connected with the lower transmission rod.

Preferably, a positioning through hole is formed in the rod body of the lower transmission rod, a positioning pin is inserted into the positioning through hole, and two ends of the positioning pin extend out of the lower transmission rod and are in contact with the top surface of the transmission bevel gear.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a press and change screwdriver can convert the sharp pushing motion into screwdriver bit's directional rotation to twist the screw, and easy and simple to handle, efficient, wherein, the utility model discloses a slip of the relative lower handle of a knife of last handle of a knife and the cooperation of going up the pole heliciform structure realize that the sharp pushing motion of going up the handle of a knife converts the rotation of going up the pole into through the slip of the relative lower handle of a knife of last handle of a knife and the cooperation of going up the pole heliciform structure, realize through the meshing of spacing pawl and first profile of tooth structure on the boss that the rotation of going up the pole drives the directional rotation of first gear, realize through the cooperation of second profile of tooth structure and second gear on the first gear that first gear drives down the directional clockwise rotation or directional anticlockwise rotation of transfer line, through the third profile of tooth structure and first transfer pawl on the transfer line down, The up-and-down movement of the lower transmission rod is realized by the arrangement of the second transmission pawl and the third reset spring, so that the second tooth-shaped structure is meshed with the second gear or the middle bevel gear is meshed with the transmission bevel gear, two kinds of meshed connection do not exist simultaneously, in addition, the arrangement of the two kinds of meshed modes realizes the directional clockwise rotation or the directional anticlockwise rotation of the lower transmission rod, and the screwdriver bit is conveniently selected to rotate clockwise or anticlockwise according to actual operation needs.

2. The utility model discloses a pressure changes screwdrivers can the efficient realize screwing or unscrewing of various screws, and after the screw quantity that needs to twist becomes more, can save down a large amount of time to make loaded down with trivial details work become simple, and then improve work efficiency.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a sectional view a-a of fig. 1.

Fig. 5 is a cross-sectional view C-C of fig. 1.

Fig. 6 is a sectional view B-B of fig. 3.

Fig. 7 is a partial view of fig. 6.

Fig. 8 is a schematic view of the structure of the upper tool shank of fig. 6.

Fig. 9 is a schematic view of the structure of the lower tool shank of fig. 6.

Description of the main elements

In the figure: the upper tool shank comprises an upper tool shank 1, a first transverse plate 11, a through hole 12, a lower tool shank 2, a guide opening 21, a mounting groove 22, a second transverse plate 23, a convex rod 24, a screwdriver head 3, an upper transmission rod 4, a first return spring 5, a boss 6, a notch 61, a limiting pawl 62, a second return spring 63, a first gear 7, a stepped groove 71, a first tooth-shaped structure 72, a second tooth-shaped structure 73, a conical tooth-shaped structure 74, a convex edge 75, a middle bevel gear 8, a transmission bevel gear 9, a lower transmission rod 10, a third tooth-shaped structure 101, a second gear 20, a first transmission pawl 30, a second transmission pawl 40, a third return spring 50 and a positioning pin 60.

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

Referring to fig. 1-9, in a preferred embodiment of the present invention, a pressing screwdriver includes an upper handle 1, a lower handle 2, and a screwdriver head 3.

The upper knife handle 1 is slidably sleeved on the outer side of the upper part of the lower knife handle 2, a first transverse plate 11 is arranged in the upper knife handle, the first transverse plate 11 is vertical to the sliding direction of the upper knife handle 1, and a through hole 12 is formed in the middle of the first transverse plate; an upper transmission rod 4, a first reset spring 5, a boss 6, a limiting pawl 62, a second reset spring 63, a first gear 7, two middle bevel gears 8, a transmission bevel gear 9, a lower transmission rod 10, a first transmission pawl 30, a second transmission pawl 40 and a third reset spring 50 are installed in the lower knife handle 2.

The outer portion of the upper transmission rod 4 is sleeved with a first reset spring 5, two ends of the first reset spring 5 are respectively abutted to a first transverse plate 11 and a boss 6, the upper transmission rod 4 is spiral, the cross section size parallel to the through opening 12 is slightly smaller than the opening size of the through opening 12, one end of the upper transmission rod 4 movably penetrates through the through opening 12 and extends to the position right above the lower knife handle 2, the other end of the upper transmission rod 4 is fixedly connected with the boss 6, a notch 61 is arranged at the top surface edge of the boss 6, the notch 61 does not penetrate through the bottom surface of the boss 6, the limiting pawl 62 and a second reset spring 63 are arranged on the notch 61, the pawl part of the limiting pawl 62 extends out of the notch 61, one end of the second reset spring 63 is fixedly connected with the boss 6, the other end of the second reset spring is abutted to the end of the pawl part of the limiting pawl 62, the elastic direction of the second return spring 63 is horizontally arranged.

The first gear 7 is rotatably connected with the inner wall of the upper part of the lower tool handle 2, preferably, a convex edge 75 is arranged in the middle of the outer side wall of the first gear 7, and the convex edge 75 is rotatably arranged in the mounting groove 22 of the inner wall of the lower tool handle 2; the top surface of first gear 7 has been seted up and has been link up the ladder groove 71 of first gear 7 bottom surface, the great one end of ladder groove 71 cross section size is last, and the inner wall of this one end is provided with first profile of tooth structure 72, boss 6 inlays in ladder groove 71, and the claw of spacing pawl 62 on it is connected with the meshing of first profile of tooth structure 72 under the effect of second reset spring 63 to make boss 6 drive first gear 7 and rotate along with the rotation of last drive rod 4 through the mode of the first profile of tooth structure 72 of spacing pawl 62 meshing. The less one end inner wall of ladder groove 71 cross section size is provided with second dentate structure 73, there is the interval in the ladder face of second dentate structure 73 and ladder groove 71, the bottom surface of boss 6, promptly, the utility model discloses a second dentate structure 73 does not extend to ladder face department, also does not contact with boss 6, also is that there is the accommodation space between second dentate structure 73 and the boss 6 exactly, and in this embodiment, ladder groove 71 has the trough-shaped structure of two kinds of cross section sizes, and boss 6 imbeds simultaneously in the trough-shaped structure of two kinds of cross section sizes, promptly the relative ladder face of ladder groove 71 in bottom of boss 6 is close to second dentate structure 73, and the preferred top surface with boss 6 flushes with the top surface of first gear 7, the top surface of lower tool shank 2. The periphery of the bottom surface of the first gear 7 is provided with a conical tooth-shaped structure 74, the conical tooth-shaped structure 74 is respectively meshed and connected with two middle bevel gears 8, the two middle bevel gears 8 are respectively arranged at two sides of the second tooth-shaped structure 73 and are both meshed and connected with the transmission bevel gear 9, and the transmission bevel gear 9 is movably arranged in the lower tool holder 2; the transmission gear is driven to rotate along with the first gear 7 in a manner that the first gear 7 is in meshed connection with the intermediate bevel gear 8 and the intermediate bevel gear 8 is in meshed connection with the transmission bevel gear 9; preferably, the rotation axes of the intermediate bevel gear 8 and the transmission bevel gear 9 are vertically arranged; the two intermediate bevel gears 8 are symmetrically arranged relative to the lower transmission rod 10.

One end of the lower transmission rod 10 is slidably inserted into the stepped groove 71 from the bottom of the first gear 7, and a second gear 20 engaged with the second tooth-shaped structure 73 is arranged at the one end, the thickness of the second gear 20 is not greater than the distance between the second tooth-shaped structure 73 and the bottom surface of the boss 6, so that the second gear 20 can slide between the second tooth-shaped structure 73 and the boss 6 when moving upwards along with the lower transmission rod 10, that is, the second gear 20 can be accommodated in the accommodating space formed by the second tooth-shaped structure 73 and the boss 6, and further the second gear 20 and the second tooth-shaped structure 73 are separated and not engaged. The other end of the lower transmission rod 10 penetrates through the bottoms of the transmission bevel gear 9 and the lower tool shank 2 in sequence and extends to the outer side of the lower tool shank 2 to be connected with the screwdriver head 3, and the screwdriver head 3 is preferably detachably connected with the lower transmission rod 10 so as to be convenient for selecting the screwdriver head 3 as required, such as a linear tool head or a cross tool head. The lower transmission rod 10 is in key connection with the transmission bevel gear 9, so that the transmission bevel gear 9 drives the lower transmission rod 10 or the lower transmission rod 10 drives the transmission bevel gear 9 to rotate.

The lower transmission rod 10 is provided with a third tooth-shaped structure 101 on the rod body between the transmission bevel gear 9 and the screwdriver head 3, two opposite sides of the third tooth-shaped structure 101 are respectively connected with a first transmission pawl 30 and a second transmission pawl 40 in a meshed mode, the first transmission pawl 30 and the second transmission pawl 40 are both rotatably connected with the inner wall of the lower cutter handle 2, the rotating axis is horizontally arranged, the claw part of the first transmission pawl 30 is meshed with the third tooth-shaped structure 101 from bottom to top in an inclined mode, and the claw part of the second transmission pawl 40 is meshed with the third tooth-shaped structure 101 from top to bottom in an inclined mode; the first transmission pawl 30 and the second transmission pawl 40 each cooperate with a third return spring 50, one end of the first return spring 5 is connected with the lower knife handle 2, the other end of the first return spring abuts against the first transmission pawl 30 and the second transmission pawl 40, wherein the third return spring 50 abutting the first transmission pawl 30 obliquely downward from above, the third return spring 50 abutting the second transmission pawl 40 obliquely upward from below, the spring force directions of the third return spring 50 are both at an angle to the first transmission pawl 30 and the second transmission pawl 40, so that the third return spring 50 momentarily abuts the first and

second transmission pawls

30 and 40 without being subjected to an external force, so that the first transmission pawl 30 and the second transmission pawl 40 are both meshed with the third tooth-shaped structure 101, and the up-and-down movement of the lower transmission rod 10 is limited; preferably, the third return spring 50 is sleeved on the convex rod 24 on the inner wall of the lower tool holder 2, the claw part of the first transmission pawl 30 is far away from the screwdriver head 3 relative to the claw part of the second transmission pawl 40, and the axes of the first transmission pawl 30 and the second transmission pawl 40 are on the same horizontal plane. The first transmission pawl 30 and the second transmission pawl 40 are matched with a guide opening 21, the guide opening 21 is formed in the wall of the lower tool shank 2 and is formed along the length direction of the lower tool shank 2 and faces the claw parts of the first transmission pawl 30 and the second transmission pawl 40, so that an external rod-shaped or rod-shaped object (such as a small iron rod) can be conveniently extended into the lower tool shank 2 through the arrangement of the guide opening 21, and then the corresponding first transmission pawl 30 or the corresponding second transmission pawl 40 is driven to be separated from the third tooth-shaped structure 101 of the lower transmission rod 10, namely, when the claw part of the first transmission pawl 30 is separated from the third tooth-shaped structure 101 and is not meshed with the third tooth-shaped structure 101, the lower transmission rod 10 can move upwards, otherwise, when the claw part of the second transmission pawl 40 is separated from the third tooth-shaped structure 101 and is not meshed with the claw part of the first transmission pawl 30 is meshed with the third tooth-shaped structure 101, at this time, the lower driving lever 10 may be moved downward. Preferably, the first transmission pawl 30 is matched with two guide ports 21, and the two guide ports 21 are respectively arranged on two opposite sides of the lower tool shank 2 and are opposite to each other; the second transmission pawl 40 is also matched with the two guide ports 21, and the two guide ports 21 are respectively arranged on two opposite sides of the lower tool shank 2 and are opposite to each other; in order to facilitate the handling and to see if the small iron bar can contact the jaw of the first transmission pawl 30 or the jaw of the second transmission pawl 40. Further, in order to use little iron rod for the convenience according to actual conditions the utility model discloses an in another kind of embodiment, with little iron rod in the inboard of the supreme handle of a knife 1 upper portion of top holding of last handle of a knife 1, realize hiding and accomodate, treat that the needs time takes out.

Through the arrangement, the utility model can realize the directional rotation of the screwdriver head 3, wherein, the linear pressing of the upper tool holder 1 is converted into the rotating motion of the upper transmission rod 4 through the sliding of the upper tool holder 1 relative to the lower tool holder 2 and the matching of the upper opening 12 of the first transverse plate 11 and the spiral structure of the upper transmission rod 4, the rotation of the upper transmission rod 4 drives the directional rotation of the first gear 7 through the meshing connection of the limiting pawl 62 on the boss 6 and the first tooth-shaped structure 72, the directional clockwise rotation or the directional anticlockwise rotation of the lower transmission rod 10 driven by the first gear 7 is realized through the matching of the second tooth-shaped structure 73 on the first gear 7 and the second gear 20 and the matching of the conical tooth-shaped structure 74 on the first gear 7 and the middle bevel gear 8 and the transmission bevel gear 9, the up-down movement of the lower transmission rod 10 is realized through the arrangement of the third tooth-shaped structure 101 on the lower transmission rod 10 and the first transmission pawl 30, the second transmission pawl 40, furthermore, the second tooth-shaped structure 73 is meshed with the second gear 20 or the middle bevel gear 8 is meshed with the transmission bevel gear 9, the two meshed connections do not exist simultaneously, namely the limit of the upward movement of the lower transmission rod 10 is that the transmission bevel gear 9 is connected with the middle bevel gear 8, at the moment, the second gear 20 is not meshed with the second tooth-shaped structure 73 but is positioned above the second tooth-shaped structure 73, the limit of the downward movement of the lower transmission rod 10 is that the second gear 20 is meshed with the second tooth-shaped structure 73, the transmission bevel gear 9 is not meshed with the middle bevel gear 8 but is positioned below the middle bevel gear, the arrangement of the two meshed modes realizes the directional clockwise rotation or the directional counterclockwise rotation of the lower transmission rod 10, the arrangement is convenient for selecting the clockwise rotation or the counterclockwise rotation according to actual requirements, therefore, in order to avoid the excessive downward movement of the lower transmission rod 10 to make the second gear 20 separate from the first gear 7, the utility model discloses the inside of lower handle of a knife 2 is provided with second diaphragm 23, second diaphragm 23 is worn to establish by the slip of transfer line 10 down, third profile of tooth structure 101 sets up between second diaphragm 23 and screwdriver bit 3, transmission bevel gear 9 sets up between second diaphragm 23 and first gear 7, there is the interval with second diaphragm 23 during transmission bevel gear 9 meshes intermediate bevel gear 8, and this spaced distance is not more than second gear 20's thickness. Furthermore, a positioning through hole is formed in the shaft body of the lower transmission rod 10, a positioning pin 60 is inserted into the positioning through hole, and two ends of the positioning pin 60 extend out of the lower transmission rod 10 and contact with the top surface of the transmission bevel gear 9 to limit the transmission bevel gear 9, so that the transmission bevel gear 9 is stably mounted on the lower transmission rod 10.

Furthermore, it should be noted that, the utility model discloses an go up handle of a knife 1 atress back of pushing down, shift up under first reset spring 5's effect, it can take place rotatoryly because of the effect of first diaphragm 11 to go up movable rod 4 in the process of moving up, boss 6 is also followed rotatoryly, nevertheless owing to set up spacing pawl 62 and second reset spring 63, first gear 7 is not rotatory taking place owing to the effect of spacing pawl 62, also first gear 7 does not rotate along with the rotation of going up movable rod 4, screwdriver bit 3 keeps the state of previous moment, this also be the directional rotation that the rotation of going up movable rod 4 said above drove first gear 7, it is preferred, breach 61 has all been seted up on the relative both sides of boss 6 to make first gear 7 atress even.

The utility model discloses when using, whether earlier according to actual need selection need make first transmission pawl 30 or second transmission pawl 40 break away from down transfer line 10 and make transfer line 10 move up or move down, thereby make second gear 20 mesh second tooth structure 73 or drive bevel gear 9 mesh intermediate bevel gear 8, also select screwdriver bit 3 clockwise rotation or anticlockwise rotation according to actual operation needs, then, with screwdriver bit 3 contact screw, loosen after pushing down handle of a knife 1, go up handle of a knife 1 and reset, screwdriver bit 3 continues to twist the screw, it can until the screw is twisted to repeat to push down handle of a knife 1.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. The utility model provides a pressure change screwdrivers blade, includes upper knife handle, lower handle of a knife, screwdrivers blade, its characterized in that: the upper knife handle is slidably sleeved on the outer side of the upper part of the lower knife handle, a first transverse plate is arranged in the upper knife handle, the first transverse plate is vertical to the sliding direction of the upper knife handle, and a through opening is formed in the middle of the first transverse plate; an upper transmission rod, a first reset spring, a boss, a limiting pawl, a second reset spring, a first gear, two middle bevel gears, a transmission bevel gear, a lower transmission rod, a first transmission pawl, a second transmission pawl and a third reset spring are arranged in the lower knife handle;

2. The compression screwdriver of claim 1, wherein: notches are formed in the two opposite sides of the boss.

3. The compression screwdriver of claim 1, wherein: and a convex edge is arranged in the middle of the outer side wall of the first gear, and the convex edge is rotatably arranged in a mounting groove in the inner wall of the lower tool handle.

4. The compression screwdriver of claim 1, wherein: and the rotation axes of the intermediate bevel gear and the transmission bevel gear are vertically arranged.

5. The compression screwdriver of claim 1, wherein: the two middle bevel gears are symmetrically arranged relative to the lower transmission rod.

6. The compression screwdriver of claim 1, wherein: the inside of lower handle of a knife is provided with the second diaphragm, the second diaphragm is worn to establish by the transfer line slip down, third profile of tooth structure sets up between second diaphragm and screwdriver bit, transmission bevel gear sets up between second diaphragm and first gear, there is the interval with the second diaphragm when transmission bevel gear meshing intermediate bevel gear, this spaced distance is not more than the thickness of second gear.

7. The compression screwdriver of claim 1, wherein: the claw part of the first transmission pawl is far away from the screwdriver head relative to the claw part of the second transmission pawl.

8. The compression screwdriver of claim 1, wherein: the first transmission pawl is matched with two guide ports which are respectively arranged on two opposite sides of the lower tool handle and are opposite to each other; the second transmission pawl is also matched with two guide ports which are respectively arranged on two opposite sides of the lower knife handle and are opposite to each other.

9. The compression screwdriver of claim 1, wherein: the screwdriver head is detachably connected with the lower transmission rod.

10. The compression screwdriver of claim 1, wherein: and a positioning through hole is formed in the rod body of the lower transmission rod, a positioning pin is inserted into the positioning through hole, and two ends of the positioning pin extend out of the lower transmission rod and are in contact with the top surface of the transmission bevel gear.