CN113319774B

CN113319774B - Pneumatic wrench for fishbone inner ring of gun

Info

Publication number: CN113319774B
Application number: CN202110768593.6A
Authority: CN
Inventors: 费征
Original assignee: Fujian Qingliu Airgun Factory Co ltd
Current assignee: Fujian Qingliu Airgun Factory Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-04-15
Anticipated expiration: 2041-07-07
Also published as: CN113319774A

Abstract

The invention discloses a pneumatic wrench for a fishbone inner ring of a gun, and relates to the field of pneumatic wrenches. Including spanner body, still include: the wrench body drives the sleeve head to rotate through the automatic decoupling type pneumatic linker, and the sleeve head is used for screwing the fishbone inner ring onto a gun body of the air gun; the automatic decoupling type pneumatic linker comprises a first connector, a second connector and an automatic decoupling type connecting mechanism, wherein the first connector and the second connector are connected through the automatic decoupling type connecting mechanism; when the moment borne by the automatic decoupling type connecting mechanism is greater than the moment critical value, the first connector and the second connector rotate relatively.

Description

Pneumatic wrench for fishbone inner ring of gun

Technical Field

The invention relates to the technical field of pneumatic wrenches, in particular to a fishbone inner ring pneumatic wrench of a gun.

Background

As is known, the fishbone inner ring of the air gun needs to be screwed on the gun body with rated screwing force, and too large or too small screwing force can affect the use performance; in addition, the fishbone inner ring is screwed through the pneumatic wrench, and the pneumatic wrench can provide high torque output. The inner ring of the fishbone is screwed on the gun body through a continuous power source, theoretically, the screwing torque of the gun body is just equal to the output torque of the pneumatic wrench, the screwing force is easy to control, and the working efficiency is high.

In the existing pneumatic wrench, for example, in the patent of the invention with the patent application number of CN201810123896.0 and the patent name of the pneumatic wrench, a pneumatic wrench is disclosed, which can improve the assembly process and the assembly quality, the pneumatic wrench comprises an impact frame, an air cylinder, an interference type silencer, a throttling core and a pressure control loop, the output torque of the pneumatic wrench can be effectively controlled by controlling the output form of a pneumatic transmission device of the pneumatic wrench, and the torque control precision is improved.

In the above patent, in the problem of controlling the pre-tightening force of the fishbone inner ring thread assembly, the torque of the gun is controlled by improving the torque control precision to correspond to the torque required by the pre-tightening force of the thread assembly, but in this way, when the fishbone inner ring assembly of the gun reaches the pre-tightening force, the pneumatic wrench with the same torque can be forced to stop rotating, and the pneumatic wrench has instant stop when being screwed in place, so that the service life of the pneumatic wrench is seriously damaged, the pneumatic wrench is forced to stop rotating, and the torque of the fishbone inner ring of a workpiece to be processed is continuously provided, and the precision of the pre-tightening force can still be influenced.

Disclosure of Invention

The invention aims to solve the problems and provide a fishbone inner ring pneumatic wrench of a gun.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention relates to a fish bone inner ring pneumatic wrench of a gun, which comprises a wrench body and further comprises:

the wrench body drives the sleeve head to rotate through the automatic decoupling pneumatic link, and the sleeve head is used for screwing the fishbone inner ring onto a gun body of the air gun;

the automatic decoupling type pneumatic linker comprises a first connector, a second connector and an automatic decoupling type connecting mechanism, wherein the first connector and the second connector are connected through the automatic decoupling type connecting mechanism;

the automatic decoupling type connecting mechanism is provided with a torque critical value, when the automatic decoupling type connecting mechanism bears the torque smaller than the torque critical value, the first connecting head and the second connecting head synchronously rotate, and when the automatic decoupling type connecting mechanism bears the torque larger than the torque critical value, the first connecting head and the second connecting head rotate relatively.

Preferably, the first connector comprises an inner sleeve head, the inner sleeve head is of a hexagonal prism cavity structure, and one end of the inner sleeve head is provided with a connector mounted on the wrench body.

Preferably, the second connector comprises an outer sleeve head, the outer sleeve head is of a hexagon socket type hollow structure, the outer sleeve head is sleeved outside the inner sleeve head, and the outer sleeve head is connected with the inner sleeve head through the automatic decoupling type connecting mechanism.

Preferably, automatic decoupling zero formula coupling mechanism includes rotor, spacing body and keeps off a position limiting mechanism, and the rotor rotates and sets up inside the inner sleeve head, the spacing body is six groups that the structure is the same and sets up respectively on six faces of inner sleeve head, keep off a position limiting mechanism for six groups that the structure is the same and with six groups spacing body one-to-one sets up, six groups keep off position limiting mechanism circumference set up in on the rotor.

Preferably, each set of the stop bodies comprises:

the sliding opening is formed in the inner sleeve head;

the supporting sliding block is embedded and slides in the sliding opening;

and the limiting top head is positioned on the outer side of the inner sleeve head and is fixedly connected with the supporting sliding block.

Preferably, the limiting top head is clamped at the inner corner of the outer sleeve head so that the outer sleeve head and the inner sleeve head cannot rotate relatively when the fishbone inner ring is pre-tightened.

Preferably, each set of gear limiting mechanisms includes:

the telescopic accommodating groove is formed in the side surface of the rotating body;

the gear body slides in the telescopic accommodating groove in a telescopic mode, and one end, extending out of the telescopic accommodating groove, of the gear body is in contact with the supporting sliding block;

the first elastic piece is arranged in the telescopic accommodating groove and connected with the gear body;

wherein, the first elastic piece is a compression spring or an arc-shaped elastic piece.

Preferably, an end of the retainer contacting the support slider has an inclined surface opposite to the side where the support slider is located and always contacting the inner wall of the sliding opening.

Preferably, the inner sleeve head and the outer sleeve head are in rotation limiting connection through a bearing so as to prevent the inner sleeve head and the outer sleeve head from being separated.

Preferably, one end of the sleeve head is a sleeve corresponding to the fishbone inner ring of the gun, and the other end of the sleeve head is a sleeve corresponding to the second connector.

In the technical scheme, the fishbone inner ring pneumatic wrench of the gun provided by the invention has the following beneficial effects:

this device is connected the cover barrel head through setting up automatic decoupling type pneumatic linker on the spanner body and rotates in order to drive the fish bone inner ring of rifle, and first connector among the automatic decoupling type pneumatic linker, the second connector passes through automatic decoupling type coupling mechanism to be connected, under the condition that reaches the fish bone inner ring pretightning force of rifle, also reach automatic decoupling type coupling mechanism's moment critical value promptly, through relative rotation between first connector and the second connector, disconnection spanner body and cover barrel head, also the rotation transmission of fish bone inner ring promptly, both reach the power of unloading effect to the fish bone inner ring, also avoid the spanner body to stop the harm that causes suddenly under external force, consequently, utilize this device can have accurate control assembly pretightning force, and do not harm the assembly tool.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural view of a pneumatic wrench for an inner ring of a fish bone of a gun according to an embodiment of the present invention;

fig. 2 is a schematic view illustrating relative rotation of an inner socket head and an outer socket head of a pneumatic wrench for a fishbone inner ring of a gun according to an embodiment of the present invention;

FIG. 3 is a front view of the telescopic supporting body and the second elastic member of the pneumatic wrench for the fishbone inner ring of the gun according to the embodiment of the invention;

fig. 4 is a schematic structural diagram of a pretightening force adjusting mechanism of a pneumatic wrench for an inner fish bone ring of a gun according to an embodiment of the present invention;

FIG. 5 is a front view of a slide limit projection of a pneumatic wrench for an inner fish bone ring of a gun according to an embodiment of the present invention;

FIG. 6 is a front view of a limiting arc-shaped slot of a pneumatic wrench for an inner fish bone ring of a gun according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a push compensation mechanism of a pneumatic wrench for an inner fish bone ring of a gun according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a clamping mechanism of a pneumatic wrench for an inner fish bone ring of a gun according to an embodiment of the present invention.

Description of reference numerals:

1. a wrench body; 2. a sleeve head; 3. an inner sleeve head; 4. a connector; 5. an outer sleeve head; 6. a rotating body; 7. a slide opening; 8. a support slide block; 9. limiting a top; 10. a telescopic accommodating groove; 11. a retainer; 12. a first elastic member; 13. a loading slot; 14. rotating the support shaft; 15. a torsion spring; 16. a limiting arc-shaped groove; 17. a sliding limit bulge; 18. a strip-shaped elastic sheet; 19. a first guide groove; 20. a second guide groove; 21. a telescopic support body; 22. a second elastic member; 23. the elastic sheet picking baffle plate; 24. a threaded hole; 25. pushing the bolt; 26. an installation body; 27. sliding the notch; 28. a third elastic member; 29. a limiting slide way; 30. a pressure lever; 31. a drive rod; 32. a limiting pressure head; 33. a limiting anti-drop groove; 34. and a fourth elastic member.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 8, the pneumatic wrench for a fish bone inner ring of a gun according to an embodiment of the present invention includes a wrench body 1, an automatic decoupling pneumatic link, and a sleeve head 2, wherein the wrench body 1 drives the sleeve head 2 to rotate through the automatic decoupling pneumatic link, and the sleeve head is used for screwing the fish bone inner ring to a gun body of the air gun; the automatic decoupling type pneumatic linker comprises a first connector, a second connector and an automatic decoupling type connecting mechanism, wherein the first connector and the second connector are connected through the automatic decoupling type connecting mechanism, the first connector is installed on the wrench body 1, and the sleeve head 2 is installed on the second connector; when the moment borne by the automatic decoupling type connecting mechanism is greater than the moment critical value, the first connector and the second connector rotate relatively.

Specifically, the wrench body 1 of the device is a main body of a common pneumatic wrench in the current market, and provides power for a fishbone inner ring of a screwing gun. The device connects the sleeve head 2 by arranging the automatic decoupling type pneumatic linker on the wrench body 1 to drive the fishbone inner ring of the gun to rotate, and the first connector and the second connector in the automatic decoupling type pneumatic linker are connected through an automatic decoupling type connecting mechanism, under the condition of reaching the pre-tightening force of the fish bone inner ring of the gun, namely reaching the critical value of the moment of the automatic decoupling type connecting mechanism, through the relative rotation between the first connector and the second connector, the rotation transmission between the wrench body 1 and the sleeve head 2, namely the fishbone inner ring, is disconnected, thereby not only achieving the effect of force unloading on the fishbone inner ring, but also avoiding the damage caused by the sudden stop of the wrench body 1 under the external force, therefore, the device can accurately control the assembling pretightening force, the pretightening force is a moment critical value and is also the maximum static friction force between the first connector and the second connector, and an assembling tool is not damaged.

Furthermore, the first connecting head comprises an inner sleeve head 3, the inner sleeve head 3 is of a hexagonal prism cavity structure, and one end of the inner sleeve head 3 is provided with a connecting head 4 arranged on the wrench body 1.

Specifically, the method comprises the following steps. The connector 4 is a connector for connecting a sleeve and the like commonly used by the existing pneumatic wrench, and can be directly connected to the wrench body 1.

Further, the second connector comprises an outer sleeve head 5, the outer sleeve head 5 is of a hexagon socket type hollow structure, the outer sleeve head 5 is sleeved outside the inner sleeve head 3, and the outer sleeve head 5 is connected with the inner sleeve head 3 through an automatic decoupling type connecting mechanism.

In this embodiment, the moment critical value is the maximum static friction moment between the outer sleeve head 5 and the inner sleeve head 3, and obviously, the moment critical value may be detected and obtained by a pressure sensor, which is a known pressure obtaining manner in the art and is not described herein again.

Specifically, the outer sleeve head 5 is of a hexagon socket type hollow structure, and a cavity inside the outer sleeve head forms a hexagon socket so as to perform subsequent transmission matching.

Further, automatic decoupling zero formula coupling mechanism includes rotor 6, spacing body and keeps off a position limiting mechanism, and rotor 6 rotates and sets up inside pullover 3, and the spacing body is six groups that the structure is the same and sets up respectively on pullover 3's six faces, keeps off a position limiting mechanism for six groups that the structure is the same and with six groups of spacing body one-to-one setting, six groups keep off position limiting mechanism circumference and set up on rotor 6.

Further, every group spacing body all includes:

the sliding opening 7 is formed in the inner sleeve head 3, and the sliding opening 7 is formed in the inner sleeve head 3;

a support slider 8, the support slider 8 is embedded and slides in the sliding opening 7;

and the limiting top 9 is positioned on the outer side of the inner sleeve head 3 and is fixedly connected with the supporting slide block 8.

Furthermore, the limit top 9 is clamped at the inner corner of the outer sleeve head 5, so that the outer sleeve head 5 and the inner sleeve head 3 cannot rotate relatively when the inner ring of the fishbone is pre-tightened.

Further, every group keeps off position limiting mechanism and all includes:

a telescopic accommodating groove 10, the telescopic accommodating groove 10 being opened on a side surface of the rotor 6;

the gear body 11 slides in the telescopic accommodating groove 10 in a telescopic mode, and one end, extending out of the telescopic accommodating groove 10, of the gear body 11 is in contact with the supporting sliding block 8;

the first elastic piece 12 is arranged in the telescopic accommodating groove 10 and connected with the retainer 11;

the first elastic element 12 is a compression spring or an arc-shaped elastic sheet.

Furthermore, the end of the gear body 11 in contact with the support slider 8 has an inclined surface opposite to the side of the support slider 8 and always in contact with the inner wall of the sliding opening 7.

Specifically, the limiting body is mainly clamped at the inner corner of the outer sleeve head 5 through the limiting top head 9 so that the outer sleeve head 5 and the inner sleeve head 3 cannot rotate relatively when the fishbone inner ring is pre-tightened, wherein the limiting top head 9 is connected and supported through the supporting slide block 8 sliding in the sliding opening 7, and the limiting top head 9 can move and is not separated from the inner sleeve head 3. The sliding opening 7 and the supporting slider 8 may be a sliding limiting fit of a sliding chute and a slider, or a sliding connection fit of a sliding rail, but this is well known to those skilled in the art and will not be described herein. The limiting top 9 is limited by the gear limiting mechanism, so that the limiting top 9 is kept in a state of being held at the inner corner of the outer sleeve head 5, and the pushing force at the moment is derived from the friction force between the inclined planes of the first elastic part 12 and the retainer 11 and the inner wall of the sliding opening 7. Between the inner corners of the limit top 9 and the outer sleeve head 5, when the inner ring of the fishbone meets the pre-tightening force requirement, that is, the torque borne by the automatic decoupling type connecting mechanism reaches the torque critical value, then the limit top 9 moves under the reaction force of the inner corner of the outer sleeve head 5, and the supporting slider 8 pushes the retainer 11 to move, specifically, the inclined surface of the retainer 11 rubs and moves relative to the inner wall of the sliding opening 7, and the retainer 11 enters the telescopic accommodating groove 10 and compresses the first elastic member 12, at this time, the limit top 9 moves to the position far away from the inner corner of the outer sleeve head 5, the limit top 9 rotates along with the inner sleeve head 3 and is not limited by the inner corner of the outer sleeve head 5, so that the inner sleeve head 3 can rotate relative to the outer sleeve head 5, at this time, the inner sleeve head 3 rotates along with the wrench body 1, and the fishbone is screwed by the sleeve head 2 to reach the pre-tightening force to make the sleeve head 2 and the outer sleeve head 5 not rotate, the wrench body 1 and the sleeve head 1 are disconnected, the rotation transmission of the fishbone inner ring is also disconnected, the force unloading effect on the fishbone inner ring is achieved, and the damage caused by sudden stop of the wrench body 1 under external force is also avoided. Subsequently, under the condition that the outer sleeve head 5 is separated from the sleeve head 2, no external force interference exists between the outer sleeve head 5 and the inner sleeve head 3, the retainer 11 is enabled to be restored to the initial position under the pushing of the first elastic piece 12, and meanwhile, the retainer 11 drives the supporting slide block 8 and the limiting ejection head 9 to be restored to the initial position, so that subsequent use is facilitated.

Furthermore, the inner sleeve head 3 and the outer sleeve head 5 are in rotation limit connection through a bearing to prevent the inner sleeve head 3 and the outer sleeve head 5 from being separated. Specifically, the bearing mainly plays a role in connecting the inner sleeve head 3 and the outer sleeve head 5, so that the inner sleeve head 3 and the outer sleeve head 5 cannot be separated from each other even if the inner sleeve head 3 and the outer sleeve head 5 can rotate relatively, and the normal use of the automatic decoupling type connecting mechanism is not influenced.

In this embodiment, further, sleeve head 2 one end is the sleeve that corresponds with the fishbone inner ring of rifle, and the other end is the sleeve that corresponds with the second connector.

Specifically, the sleeve that the fish bone inner ring of 2 one ends of cover barrel head and rifle correspond is conventional spacing sleeve, makes both unable relative rotations, can carry out the pretension operation then after both connect, and the same 2 other ends of cover barrel head are the sleeve that corresponds with the second connector, are in order to make both unable relative rotations to make both carry out synchronous rotation.

In another embodiment of the invention, referring to fig. 1-6, in order to deal with the difference of torque values required by the fishbone inner rings to reach the pretightening force for different snatching, the automatic decoupling type connecting mechanism has an adjustable torque critical value so as to improve the use efficiency and flexibility of the pneumatic wrench, the automatic decoupling type connecting mechanism in the embodiment further comprises a pretightening force adjusting mechanism, and the pretightening force adjusting mechanism comprises a rotation reset mechanism and a torque adjusting mechanism which are arranged between the rotating body 6 and the inner sleeve head 3;

furthermore, the rotation reset mechanism comprises a reset driving mechanism and a rotation limiting mechanism;

further, the reset drive mechanism includes:

a loading groove 13, wherein the loading groove 13 is arranged at one end of the rotating body 6 facing to the side of the connecting head 4;

a rotating support shaft 14, one end of the rotating support shaft 14 is fixedly connected in the loading groove 13, and the other end of the rotating support shaft 14 extends out of the loading groove 13 and is rotatably connected on the inner side surface of the inner sleeve head 3 through a bearing;

and the torsion spring 15 is sleeved on the rotating support shaft 14 and positioned in the loading groove 13, one end of the torsion spring 15 is connected to the inner wall of the loading groove 13, and the other end of the torsion spring 15 is connected to the inner wall of the inner sleeve head 3.

Specifically, in this embodiment, the adjustment of the pretightening force in the pretightening force adjustment mechanism is controlled by adjusting the reverse torque applied to the rotating body 6 during rotation, so that the pretightening force adjustment mechanism needs to be reset after the rotating body 6 completes the decoupling action after rotating, so as to be used later. Therefore, a rotation returning mechanism is required in the present embodiment, and a returning driving mechanism in the rotation returning mechanism is provided, so that the torsion spring 15 for driving the rotating body 6 to return by rotation is hidden in the loading slot 13, and the rotating support shaft 14 is hidden together, so that the space distribution is more reasonable, and the volume of the whole device is reduced. The rotating support shaft 14 rotatably supports the rotating body 6, so that the rotating body 6 can rotate relative to the inner sleeve head 3, that is, the rotating body 6 rotates relative to the inner sleeve head 3 to complete the decoupling action or the resetting action. Wherein the torsion spring 15 is the main driving force for the return rotation of the rotating body 6.

The rotation restricting mechanism includes:

the limiting arc-shaped groove 16 is formed in the inner side surface of the inner sleeve head 3;

and the sliding limiting bulge 17 is arranged on the rotating body 6 and is adjacent to the loading groove 13, and the sliding limiting bulge 17 slides in the limiting arc-shaped groove 16.

Specifically, the rotation of the rotating body 6 needs to be within a certain angle range, and meanwhile, the rotating body and the movement track of the gear limiting mechanism are matched to rotate, so that the rotation angle range of the rotating body 6 is limited by limiting sliding of the sliding limiting protrusion 17 on the rotating body 6 in the limiting arc-shaped groove 16.

Further, the torque adjustment mechanism includes:

the elastic strip sheets 18 are arranged in parallel, one end of each elastic strip sheet 18 is fixedly connected to the inner wall of the inner sleeve head 3, and the other end of each elastic strip sheet 18 is an elastic deformation end capable of swinging freely;

the elastic piece picking mechanism is arranged between the inner sleeve head 3 and the rotating body 6, and the overlapping position range of the elastic piece picking mechanism and the strip-shaped elastic pieces 18 is changed through movement so as to adjust moments with different magnitudes, which are applied to the rotating body 6 by the strip-shaped elastic pieces 18 with different numbers;

further, shell fragment picks up the mechanism and includes:

a first guide groove 19, the first guide groove 19 being opened on an end surface of the rotor 6 opposite to the end where the loading groove 13 is located;

a second guide groove 20, wherein the second guide groove 20 is arranged on the inner wall of the first guide groove 19;

the telescopic supporting body 21 is arranged in the first guide groove 19 in a telescopic sliding mode, a second elastic piece 22 is arranged in the first guide groove 19, and the second elastic piece 22 is connected with the telescopic supporting body 21;

the elastic piece picking baffle 23 is arranged on the telescopic supporting body 21 and slides in the second guide groove 20, and one end, extending out of the second guide groove 20, of the elastic piece picking baffle 23 is in lap joint with the elastic deformation end of the strip-shaped elastic piece 18;

a threaded hole 24, wherein the threaded hole 24 is formed in the inner sleeve head 3 and is opposite to the first guide groove 19;

and the pushing bolt 25, the pushing bolt 25 cooperates with threaded hole 24 whorl, one end that the pushing bolt 25 stretches into the inside race head 3 is pressed against and stretched out in one end of the first guide slot 19 on the telescopic support body 21.

Specifically, the pushing bolt 25 is in threaded fit with the threaded hole 24, so that the pushing bolt 25 pushes the telescopic support body 21 to slide in the first guide groove 19 in a telescopic manner, and the second elastic element 22 pushes the telescopic support body 21 to keep the force of extending out of the first guide groove 19, so that the telescopic support body is reset and moved. The second elastic member 22 is a compression spring or an arc-shaped elastic sheet. The flexible supporter 21 removes and drives the shell fragment and picks up baffle 23 and slide in second guide way 20, make the shell fragment pick up baffle 23 and adjust the length that stretches out second guide way 20, wherein the shell fragment picks up the baffle 23 and stretches out the length of second guide way 20 longer, the strip elastic force piece 18 quantity that the baffle 23 was picked up to the shell fragment is more, the moment of torsion that receives when making it rotate along with rotor 6 is big, otherwise then opposite, reverse moment that receives when adjusting rotor 6 and rotating with this, then adjusted automatic decoupling type coupling mechanism's moment critical value, in order to correspond the fishbone inner ring of different guns and will reach the required different moment values of pretightning force. The moment value required by the fish bone inner ring of the gun to reach the pre-tightening force is equal to the moment critical value of the automatic decoupling type connecting mechanism, namely the sum of the elastic value of the first elastic piece 12 in the automatic decoupling type connecting mechanism, the friction value between the inclined plane on the gear body 11 and the inner wall of the sliding opening 7, the elastic value of the torsion spring 15 and the elastic value generated by the moment adjusting mechanism.

In another embodiment provided by the present invention, referring to fig. 4, 7, and 8, after the motion decoupling, the first connector and the second connector rotate relatively to each other, so that the limit plug 9 in the automatic decoupling type connecting mechanism rotates relatively to the inner wall of the outer sleeve head 5 at a high speed, and the wear of the limit plug 9 is very serious in the process, while the outer sleeve head 5 is made of a wear-resistant material, in order to cope with the wear of the limit plug 9 and prolong the service life of the limit plug 9, in this embodiment, the limit plug 9 is supported by the push compensation mechanism, so that the limit plug 9 can keep a state of being clamped at the inner corner of the outer sleeve head 5 for a longer time, and the push compensation mechanism includes:

the mounting body 26 is connected to the supporting slide block 8, a sliding notch 27 is formed in the side surface, opposite to the side where the supporting slide block 8 is located, of the mounting body 26, the sliding notch 27 accommodates the limiting top 9 to slide and move, and one end, extending out of the sliding notch 27, of the limiting top 9 is clamped at the inner angle of the outer sleeve 5;

the third elastic element 28 is positioned in the sliding notch 27 and connected to the limit plug 9 to push the limit plug 9 to extend out of the sliding notch 27, wherein the third elastic element 28 is a compression spring or an arc-shaped elastic sheet;

and the limiting slide way 29 is arranged between the limiting top 9 and the inner wall of the sliding notch 27 to limit the limiting top 9 to be separated from the sliding notch 27.

Specifically, the third elastic element 28 pushes one end of the limiting top 9 extending out of the sliding notch 27 to be clamped at the inner angle of the outer sleeve 5, so as to counteract the abrasion of the limiting top 9, and the limiting top 9 is always clamped at the inner angle of the outer sleeve 5. The moment value required by the fish bone inner ring of the gun to reach the pre-tightening force is equal to the moment critical value of the automatic decoupling type connecting mechanism, namely the sum of the elastic value of the first elastic part 12 in the automatic decoupling type connecting mechanism, the friction value between the inclined plane on the gear body 11 and the inner wall of the sliding opening 7, the elastic value of the torsion spring 15, the elastic value generated by the moment adjusting mechanism and the elastic value of the third elastic part 28.

Another point of this embodiment is that the pushing compensation mechanism and the torque adjustment mechanism can complement each other, when the limiting plug 9 is worn, the third elastic member 28 is extended, the extrusion force of the third elastic member 28 is reduced, the friction force of the corresponding limiting plug 9 to the outer sleeve head 5 is correspondingly reduced, but the torque force of the torsion spring 15 to the rotating body 6 can be reduced, the elastic extrusion force of the first elastic member 12 to the blocking body 11 is correspondingly increased, the extrusion force of the corresponding blocking body 11 to the mounting body 26 is increased, the friction force of the limiting plug 9 and the outer sleeve head 5 is correspondingly increased, so that the pushing compensation mechanism and the torque adjustment mechanism can complement each other. In addition, according to the logic, the bar-shaped elastic sheet 18 has similar effects, which is not described in detail.

In another embodiment of the present invention, referring to fig. 8, in order to mount the sleeve head 2 on the second connection head, and to make the connection more stable, and prevent the sleeve head 2 from falling off from the second connection head, in this embodiment, the outer sleeve head 5 is provided with a clamping mechanism, the clamping mechanism includes a rotating rod, the middle of the rotating rod is hinged on the side surface of the outer sleeve head 5, the rotating rod includes a pressing rod 30 facing the sleeve head 2 and a driving rod 31 opposite to the pressing rod 30, the pressing rod 30 is provided with a limit pressing head 32, the side surface of the sleeve head 2 is provided with a limit anti-falling groove 33 corresponding to the limit pressing head 32, a fourth elastic member 34 is provided between the driving rod 31 and the side surface of the outer sleeve head 5, and the fourth elastic member 34 is a compression spring or an arc-shaped elastic sheet.

Specifically, under the elasticity promotion of fourth elastic component 34, promote actuating lever 31 and rotate, drive depression bar 30 then and rotate, make depression bar 30 drive spacing pressure head 32 and impress spacing anticreep groove 33 in and carry out spacing fixed to cover barrel head 2, prevent that cover barrel head 2 from droing on the second connector.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The utility model provides a fish bone inner ring pneumatic wrench of rifle, includes spanner body (1), its characterized in that still includes:

the wrench comprises an automatic decoupling type pneumatic connector and a sleeve head (2), wherein the wrench body (1) drives the sleeve head (2) to rotate through the automatic decoupling type pneumatic connector, and the sleeve head is used for screwing a fishbone inner ring onto a gun body of an air gun;

the automatic decoupling type pneumatic linker comprises a first connector, a second connector and an automatic decoupling type connecting mechanism, wherein the first connector and the second connector are connected through the automatic decoupling type connecting mechanism, the first connector is installed on the wrench body (1), and the sleeve head (2) is installed on the second connector;

2. The pneumatic fish bone inner ring spanner of a gun as claimed in claim 1, wherein said first connection head comprises an inner sleeve head (3), said inner sleeve head (3) is a hexagonal prism cavity structure, and one end of said inner sleeve head (3) is provided with a connection head (4) mounted on said spanner body (1).

3. The pneumatic fish bone inner ring spanner of a gun as claimed in claim 2, wherein said second connector comprises an outer sleeve head (5), said outer sleeve head (5) is a hexagonal hollow structure, said outer sleeve head (5) is sleeved outside said inner sleeve head (3), said outer sleeve head (5) is connected with said inner sleeve head (3) through said automatic decoupling type connecting mechanism.

4. The pneumatic fish bone inner ring spanner of a gun as claimed in claim 3, wherein said automatic decoupling type connecting mechanism comprises a rotating body (6), a limiting body and a gear limiting mechanism, wherein the rotating body (6) is rotatably arranged inside said inner sleeve head (3), said limiting body is six groups with the same structure and is respectively arranged on six surfaces of said inner sleeve head (3), said gear limiting mechanism is six groups with the same structure and is arranged in one-to-one correspondence with said limiting body, and said gear limiting mechanism is circumferentially arranged on said rotating body (6).

5. The fish bone inner ring pneumatic wrench of a gun as claimed in claim 4, wherein each set of the position limiting bodies comprises:

the sliding opening (7) is formed in the inner sleeve head (3);

the supporting sliding block (8) is embedded in the sliding opening (7) and slides in the sliding opening (8);

and the limiting top head (9), the limiting top head (9) is positioned at the outer side of the inner sleeve head (3) and is fixedly connected with the supporting sliding block (8).

6. The pneumatic wrench for the inner fish bone ring of the gun as claimed in claim 5, wherein the limit plug (9) is clamped at an inner corner of the outer sleeve head (5) so that the outer sleeve head (5) and the inner sleeve head (3) cannot rotate relatively when the inner fish bone ring is pre-tightened.

7. The fish bone inner ring pneumatic wrench of a gun as claimed in claim 5, wherein each set of gear limiting mechanisms includes:

a telescopic accommodating groove (10), wherein the telescopic accommodating groove (10) is formed in the side surface of the rotating body (6);

the retainer (11) slides in the telescopic accommodating groove (10) in a telescopic mode, and one end, extending out of the telescopic accommodating groove (10), of the retainer (11) is in contact with the supporting sliding block (8);

the first elastic piece (12) is arranged in the telescopic accommodating groove (10) and connected with the retainer (11);

wherein, the first elastic piece (12) is a compression spring or an arc-shaped elastic piece.

8. A pneumatic fish-bone-inner-ring wrench as claimed in claim 7, wherein the end of said retainer (11) in contact with said supporting slider (8) has a slope opposite to the side of said supporting slider (8) and always in contact with the inner wall of said sliding opening (7).

9. A pneumatic fish bone inner ring spanner for guns as claimed in claim 3, characterized in that, the rotation limit connection between the inner sleeve head (3) and the outer sleeve head (5) is performed by a bearing to prevent the inner sleeve head (3) and the outer sleeve head (5) from being separated.

10. The pneumatic wrench as claimed in any one of claims 1 to 9, wherein the sleeve head (2) has a sleeve at one end corresponding to the inner ring of the fish bone of the gun and a sleeve at the other end corresponding to the second connector.