CN214007662U

CN214007662U - Piston of nailing gun

Info

Publication number: CN214007662U
Application number: CN202023223448.XU
Authority: CN
Inventors: 张华定
Original assignee: Taizhou Dingba Power Tools Co ltd
Current assignee: Taizhou Dingba Power Tools Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-20
Anticipated expiration: 2030-12-28

Abstract

The utility model provides a piston of nailing gun belongs to electric tool technical field. It has solved the difficult problem of adjusting of current nailing rifle nailing dynamics. This piston of nail rifle, including cylindrical body, annular pressure relief groove has been seted up to circumference on the body outer peripheral face, and the guide ring is equipped with to the pressure relief inslot cover, still is equipped with the tensioning piece that can make the guide ring protrusion pressure relief groove in pressure relief groove, all has the clearance that is used for gas to pass through between the cell wall in guide ring and pressure relief groove and the bottom surface. The piston of the nailing gun can adjust the nailing force by controlling the pressurizing completion time.

Description

Piston of nailing gun

Technical Field

The utility model belongs to the technical field of electric tool, a piston of nailing gun is related to.

Background

Pneumatic nailing gun is formed by the combination of body of a gun part and nail box part, and the body of a gun part comprises gun shell, cylinder, trigger subassembly, firing pin subassembly, muzzle and bumper subassembly etc. form pressure differential after compressing gas through the cylinder, make the firing pin be reciprocating motion in the cylinder through trigger switch, and pneumatic nailing gun relies on the atmospheric pressure in the power cylinder body to promote the piston usually, and then beats the steel nail out, and consequently the dynamics that the atmospheric pressure size in the power cylinder body had decided the steel nail and beaten out.

In order to ensure the accuracy of the air pressure value and further ensure the accuracy of the steel nail driving force, patent document (application number: 201920866981.6) discloses a multifunctional air nozzle and a convenient inflation nail gun, wherein the air nozzle is a tee joint, one end of the air nozzle is communicated with the inner cavity of a power cylinder, the other end of the air nozzle is connected with an air source, the other end of the air nozzle is communicated with the outside and is provided with a valve core, when the air source inflates the air pressure in the power cylinder to a set value, the valve core can be pushed open, redundant air is discharged from the valve core, and the accurate air pressure value in the power cylinder is further ensured.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a piston of nailing gun for solve the difficult problem of adjusting of current nailing gun nailing dynamics.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a piston of nailing gun, includes cylindrical body, its characterized in that, annular pressure release groove has been seted up to circumference on the body outer peripheral face, the guide ring is equipped with to the pressure release inslot cover, still is equipped with the tensioning piece that can make the guide ring protrusion pressure release groove at the pressure release inslot, all have the clearance that is used for gas to pass through between the cell wall in guide ring and pressure release groove and the bottom surface.

The nailing gun is internally provided with a power cylinder body and a pressure boosting cylinder body which are communicated, the body is arranged in the power cylinder body in a sliding way, a motor drives a piston in the pressure boosting cylinder body to move and compress gas in the pressure boosting cylinder body, an inner cavity of the pressure boosting cylinder body is communicated with an inner cavity of the power cylinder body, and the body is locked, so that the gas pressure in the power cylinder body rises, when the body is unlocked, the body is pushed out to realize nailing, the guide ring of the nailing gun protrudes out of the pressure relief groove, when the body is arranged in the power cylinder body, the outer peripheral surface of the guide ring is abutted against the inner peripheral surface of the power cylinder body to form sliding fit, a gap is formed between the outer peripheral surface of the body and the inner peripheral surface of the power cylinder body, meanwhile, the outer peripheral surface of the body is provided with the pressure relief groove, gaps for gas to pass through are formed between the groove walls and the bottom surfaces of the guide ring and the pressure relief groove, and therefore, the gas can be partially leaked to the outer side of the body in the process of the power cylinder body when the pressure boosting cylinder body rises, thereby make the atmospheric pressure value that produces when accomplishing the pressure boost in the power cylinder body descend, and then make the dynamics that the body was released reduce, the time of accomplishing the pressure boost in the power cylinder body is longer promptly in the power cylinder body, the time of pressure release is also longer, atmospheric pressure in the power cylinder body is less, the dynamics that the body was beaten is also less, the time of accomplishing the pressure boost in the power cylinder body is shorter, the time of pressure release is also shorter, the atmospheric pressure in the power cylinder body is bigger, the dynamics that the body was beaten is also bigger, thereby can adjust the dynamics of nailing through the time of control pressure boost completion.

In the piston of the nailing gun, the width of the pressure relief groove is larger than that of the guide ring, and the diameter of the bottom surface of the pressure relief groove is smaller than the inner diameter of the guide ring. The side wall of the guide ring can abut against the groove wall on one side of the pressure relief groove in the reciprocating movement process of the body, but gas can sufficiently pass through the side wall and the groove wall under the action of higher air pressure so as to realize pressure relief.

In foretell nailing gun's piston, the guide ring adopts the polytetrafluoroethylene material to make, has still seted up the fracture on the guide ring, and the guide ring can radially expand deformation and protrusion pressure relief groove under the effect of tensioning piece. Polytetrafluoroethylene is high temperature resistant, toughness and structural stability are very high, and coefficient of friction is low, it is smooth and easy with power cylinder body sliding fit when making the guide ring keep self stability, but the guide ring of this material is deformable and has certain elasticity, consequently, set up the fracture, the fracture can make the guide ring break through the constraint of self toughness, make the guide ring can be along radial expansion deformation, thereby fully support and lean on power cylinder body internal perisporium under the effect of tensioning piece, and then make and keep the clearance between guide ring internal peripheral wall and the pressure release tank bottom surface to be used for the pressure release, the fracture also can directly be used for gas to pass through the pressure release certainly, make the guide ring support the body and for the body provide the direction have the pressure release function that gas passes through.

In the piston of foretell nailing gun, the tensioning piece includes the rubber circle, the rubber circle is located the inboard of guide ring, and the outer border tensioning of rubber circle supports and leans on the guide ring internal peripheral face. The rubber circle has great elasticity, and the external diameter under its natural state is greater than the internal diameter under the guide ring natural state to set up the rubber circle in the inboard of guide ring, the rubber circle can exert radial outside expansion force to the guide ring, thereby makes the guide ring fully support and lean on in the power cylinder body internal perisporium, and the rubber circle can also adopt elastic metal ring at actual course of working, also sets up the fracture on this metal ring and can have outside expansion force.

In the piston of the nailing gun, an annular limiting groove is circumferentially formed in the bottom surface of the pressure relief groove, the width of the limiting groove is smaller than that of the pressure relief groove, and the rubber ring is sleeved in the limiting groove. The spacing groove can carry on spacingly to the rubber circle, guarantees its stability.

In the piston of the nailing gun, the limiting groove is positioned in the middle of the pressure relief groove in the width direction, the width of the rubber ring is smaller than that of the limiting groove, and the inner diameter of the rubber ring is larger than that of the bottom surface of the limiting groove. The width of rubber circle is less, and forms the clearance between the bottom surface of the spacing groove, therefore gaseous clearance and the clearance between rubber circle and the spacing groove cell wall between can follow the guide ring and let out the pressure groove cell wall between pass through, guarantees that the pressure release is smooth and easy.

In the above-mentioned nailing gun piston, the guide conical surfaces are formed by chamfering both end edges of the outer peripheral surface of the guide ring. When gas passes through the gap between the body and the inner wall of the power cylinder body, the gas can enter the gap between the guide ring and the groove wall of the pressure relief groove under the action of the guide conical surface, so that smooth gas flow is ensured.

In the piston of the nailing gun, the piston further comprises a connecting column, a screw hole is formed in the end face of the body, one end of the connecting column is in threaded connection with the screw hole of the body, the other end of the connecting column protrudes out of the end face of the body, and the outer end of the connecting column is further connected with a firing pin. The firing pin realizes locking and nailing to the body.

In the piston of the nailing gun, the end face of the outer end of the connecting column is provided with the connecting groove, the outer peripheral surface of the outer end of the connecting column is radially provided with the through riveting hole, the end part of the firing pin is provided with the connecting hole, the end part of the firing pin is inserted into the connecting groove, and the riveting hole is aligned with the connecting hole and riveted through the rivet. The connection of the connecting column and the firing pin is more stable.

Compared with the prior art, the piston of the nailing gun has the following advantages:

1. because the guide ring protrudes out of the pressure relief groove, when the body is arranged in the power cylinder body, the outer peripheral surface of the guide ring is abutted against the inner peripheral surface of the power cylinder body to form sliding fit, a gap is formed between the outer peripheral surface of the body and the inner peripheral surface of the power cylinder body, meanwhile, the pressure relief groove is arranged on the outer peripheral surface of the body, and gaps for gas to pass through are formed between the groove walls and the bottom surface of the guide ring and the pressure relief groove, so that gas can be partially leaked to the outer side of the body in the process of increasing the gas pressure in the power cylinder body, the gas pressure value generated when the pressure increase is completed in the power cylinder body is reduced, and the force for pushing out the body is reduced, namely, the longer the time for completing the pressure increase in the power cylinder body is, the shorter the gas pressure relief time in the power cylinder body is, the larger the gas pressure in the power cylinder body is, the bigger the strength that the body was beaten is also to can adjust the dynamics of nailing through the time of control pressure boost completion.

2. Because the fracture has still been seted up on the guide ring, the fracture can make the guide ring break through the constraint of self toughness for the guide ring can be along radial expansion deformation, thereby fully support under the effect of tensioning piece and lean on power cylinder body internal perisporium, and then make and keep the clearance between guide ring internal perisporium and the pressure release tank bottom surface and be used for the pressure release, the fracture also can directly be used for gaseous pressure release through, make the guide ring have gaseous pressure release function that passes through when supporting the body and providing the direction for the body of course.

Drawings

FIG. 1 is a perspective view of a piston of a nailing machine.

FIG. 2 is a sectional view showing the structure of a piston of a nailing machine.

Figure 3 is a partial cross-sectional view of the piston when installed in the power cylinder.

Fig. 4 is an enlarged view of the structure at a in fig. 3.

In the figure, 1, a body; 11. a pressure relief groove; 12. a limiting groove; 13. a screw hole; 2. a guide ring; 21. breaking off; 22. a guiding conical surface; 3. a rubber ring; 4. connecting columns; 41. connecting grooves; 42. riveting holes; 5. a striker; 51. connecting holes; 6. riveting; 7. a pressurizing cylinder body; 8. a power cylinder body.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, a piston of a nailing gun, the nailing gun includes a pressurizing cylinder body 7 and a power cylinder body 8, the power cylinder body 8 and the pressurizing cylinder body 7 are both arranged along the front and back, and the power cylinder body 8 is located above the pressurizing cylinder body 7, the inner cavity of the power cylinder body 8 is communicated with the inner cavity of the pressurizing cylinder body 7, the piston includes a columnar body 1, an annular pressure relief groove 11 is circumferentially arranged on the outer peripheral surface of the body 1, a guide ring 2 is sleeved in the pressure relief groove 11, a rubber ring 3 capable of enabling the guide ring 2 to protrude out of the pressure relief groove 11 is further arranged in the pressure relief groove 11, gaps for gas to pass through are respectively arranged between the guide ring 2 and the groove wall and the bottom surface of the pressure relief groove 11, the body 1 is slidably arranged in the power cylinder body 8, and the outer peripheral surface of the guide ring 2 is slidably matched with the inner peripheral surface of the power cylinder body 8, and gaps are formed between the outer peripheral surface of the body 1 and the inner peripheral surface of the power cylinder body 8.

Particularly, annular spacing groove 12 has been seted up to circumference on the pressure release groove 11 bottom surface, the width of this spacing groove 12 is less than the width of pressure release groove 11, spacing groove 12 is located the middle part of the 11 width direction of pressure release groove, 3 covers of rubber circle establish at spacing groove 12, rubber circle 3 is located the inboard of

guide ring

2, and 3 outer edges of rubber circle tensioning is supported and is leaned on the 2 inner peripheral surfaces of guide ring, guide ring 2 adopts polytetrafluoroethylene material to make, fracture 21 has still been seted up on guide ring 2, guide ring 2 can radial expansion deformation and protrusion pressure release groove 11 under the effect of rubber circle 3. The width of pressure relief groove 11 is greater than the width of guide ring 2, and the diameter of pressure relief groove 11 bottom surface is less than the internal diameter of guide ring 2, and the width of rubber circle 3 is less than the width of spacing groove 12, and the internal diameter of rubber circle 3 is greater than the bottom surface diameter of spacing groove 12, and the both ends border of 2 outer peripheral faces of guide ring all forms guiding conical surface 22 through the chamfer.

The piston further comprises a connecting column 4, a screw hole 13 is formed in the end face of the body 1, one end of the connecting column 4 is in threaded connection with the screw hole 13 of the body 1, the other end of the connecting column protrudes out of the end face of the body 1, a firing pin 5 is further connected to the outer end of the connecting column 4, a connecting groove 41 is formed in the end face of the outer end of the connecting column 4, a through riveting hole 42 is formed in the outer peripheral face of the outer end of the connecting column 4 in the radial direction, orifices at two ends of the riveting hole 42 are in flaring shapes, a connecting hole 51 is formed in the end portion of the firing pin 5, the end portion of the firing pin 5 is inserted into the connecting groove 41, and the riveting hole 42 is aligned with the connecting hole 51 and is riveted through a rivet 6.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms body 1, relief groove 11, retaining groove 12, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a piston of nailing gun, includes columnar body (1), its characterized in that, annular pressure release groove (11) have been seted up to circumference on body (1) outer peripheral face, pressure release groove (11) endotheca is equipped with guide ring (2), still is equipped with the tensioning piece that can make guide ring (2) protrusion pressure release groove (11) in pressure release groove (11), all have the clearance that is used for gas to pass through between guide ring (2) and the cell wall and the bottom surface of pressure release groove (11).

2. The piston for a nailing gun according to claim 1, wherein the width of the pressure relief groove (11) is larger than the width of the guide ring (2), and the diameter of the bottom surface of the pressure relief groove (11) is smaller than the inner diameter of the guide ring (2).

3. The piston for a nailing gun according to claim 2, wherein the guide ring (2) is made of polytetrafluoroethylene, a fracture (21) is further formed on the guide ring (2), and the guide ring (2) can radially expand and deform and protrude out of the pressure relief groove (11) under the action of the tension member.

4. A piston for a nailing gun according to claim 1, 2 or 3, wherein the tensioning member comprises a rubber ring (3), the rubber ring (3) is located inside the guide ring (2), and the outer edge of the rubber ring (3) is tensioned against the inner peripheral surface of the guide ring (2).

5. The piston of the nailing gun as claimed in claim 4, wherein the bottom surface of the pressure relief groove (11) is circumferentially provided with an annular limiting groove (12), the width of the limiting groove (12) is smaller than that of the pressure relief groove (11), and the rubber ring (3) is sleeved in the limiting groove (12).

6. The piston for a nailing gun according to claim 5, wherein the stopper groove (12) is located at the middle of the pressure release groove (11) in the width direction, the width of the rubber ring (3) is smaller than the width of the stopper groove (12), and the inner diameter of the rubber ring (3) is larger than the diameter of the bottom surface of the stopper groove (12).

7. The plunger of a nailing gun according to claim 1, 2 or 3, wherein both end edges of the outer peripheral surface of the guide ring (2) are chamfered to form guide tapered surfaces (22).

8. The piston of the nailing gun according to claim 1, 2 or 3, wherein the piston further comprises a connecting column (4), a screw hole (13) is formed in the end surface of the body (1), one end of the connecting column (4) is screwed in the screw hole (13) of the body (1), the other end of the connecting column protrudes out of the end surface of the body (1), and the outer end of the connecting column (4) is further connected with a firing pin (5).

9. The piston of the nailing gun as claimed in claim 8, wherein the outer end face of the connecting column (4) is provided with a connecting groove (41), the outer peripheral surface of the outer end of the connecting column (4) is provided with a through riveting hole (42) along the radial direction, the end of the striker (5) is provided with a connecting hole (51), the end of the striker (5) is inserted into the connecting groove (41), and the riveting hole (42) is aligned with the connecting hole (51) and riveted by a rivet (6).