CN219649807U

CN219649807U - Nail gun and electric tool

Info

Publication number: CN219649807U
Application number: CN202221488703.XU
Authority: CN
Inventors: 郝敬冬; 付祥青
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2021-06-29
Filing date: 2022-06-15
Publication date: 2023-09-08
Anticipated expiration: 2032-06-15

Abstract

The utility model discloses a nail gun and an electric tool, wherein the nail gun comprises a shell; a clip portion for receiving a fastener; a firing assembly disposed within the housing for impacting the fastener; the power output part is connected with the firing assembly to drive the firing assembly to move; the air cylinder is arranged in the extending direction of the firing assembly; the cylinder includes at least an elastic element that acts with the firing assembly in a first direction. The nail gun and the electric tool disclosed by the utility model have strong striking capability, good hand feeling in use and can realize the miniaturization of the structure.

Description

Nail gun and electric tool

Technical Field

The utility model relates to an electric tool, in particular to a nail gun.

Background

Most of the existing nail gun products in the current market adopt a pre-inflation double-cylinder structure. Due to the structure of the double cylinders, the nailing gun cannot be miniaturized, and obvious recoil can be generated when nailing is completed, so that the using hand feeling of a user is affected. On the other hand, because the piston reciprocates on the cylinder wall for a long time in the double-cylinder structure, the phenomenon of air leakage of the cylinder is easy to occur, thereby influencing the service life of the nail gun.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide a nail gun and an electric tool which have strong striking capability, good using hand feel and can realize structure miniaturization.

In order to achieve the above object, the present utility model adopts the following technical scheme:

a nail gun, comprising: a housing; a clip portion for receiving a fastener; a firing assembly disposed within the housing for impacting the fastener; the power output part is connected with the firing assembly to drive the firing assembly to move; the air cylinder is arranged in the extending direction of the firing assembly; the cylinder includes at least an elastic element that acts with the firing assembly in a first linear direction.

Further, the cylinder further comprises a cylinder body, the elastic element and the cylinder body are formed with a first chamber and a second chamber which are distributed along the first straight line direction, and the elastic element is located between the first chamber and the second chamber.

Further, the gas in the first chamber is not in communication with the gas in the second chamber; the volume of the first chamber or the second chamber changes with the change of the deformation amount of the elastic element in the first linear direction.

Further, the firing assembly includes: a piston disposed within the second chamber; the firing pin is connected with the piston and drives the piston to reciprocate in the second cavity along the first linear direction; the firing pin is provided with driving teeth.

Further, the gas in the first chamber can push the elastic element to do work on the piston.

Further, the cylinder is provided as a film type cylinder, and the elastic element is provided as a diaphragm.

Further, the power output part at least comprises a motor and a driving wheel driven by the motor, wherein the driving wheel is provided with transmission teeth, and the transmission teeth can be meshed with the driving teeth.

Further, the nail gun is provided with a trigger switch and a main control switch arranged on the shell, and the trigger switch comprises a trigger rod and a micro switch.

Further, when the trigger switch and the main control switch are in the trigger state at the same time, the nailing gun can complete the nailing function.

Further, a mode button for user selection is provided on the housing, and the mode button can switch the nailing mode of the nailing gun.

A power tool, comprising: a housing; a functional element for implementing the function of the electric tool; a firing assembly disposed within the housing for impacting the functional element; the power output part is connected with the firing assembly to drive the firing assembly to move; the air cylinder can push the firing assembly to move; the cylinder includes at least an elastic element that acts with the firing assembly in a first linear direction.

Further, the power tool includes, but is not limited to, a nail gun, a hammer, or a pick.

The utility model has the advantages that: the structure of the cylinder of the nail gun and the electric tool in the prior art is optimized, and the structure is miniaturized and the user has better using hand feeling on the basis of ensuring the striking strength.

Drawings

FIG. 1 is a perspective view of a nailer as an embodiment;

FIG. 2 is a semi-sectional view of the internal structure of the nail gun of FIG. 1;

FIG. 3 is a perspective view of a portion of the structure of the interior of the nailer of FIG. 1;

FIG. 4 is a perspective view of another view of the portion of the structure shown in FIG. 3;

FIG. 5 is a schematic illustration of the piston reaching a bottom dead center position of the cylinder.

Description of the embodiments

The utility model is described in detail below with reference to the drawings and the specific embodiments.

Fig. 1 shows an electric tool according to an embodiment of the present utility model, which is a nail gun 1 for generating a striking force against a nail to strike the nail into a workpiece. The nail gun 1 in this embodiment can be powered by connecting a battery pack 2. Of course, it is also possible to connect to the mains supply and supply power by means of alternating current. The electric tool protected by the utility model can also be an electric hammer, an electric pick and the like. It is understood that it is within the scope of the present utility model as long as the electric tool contains a cylinder inside.

Referring to fig. 1 to 4, the nail gun 1 includes: the cartridge includes a housing 10, a power take off 20, a cylinder 30, a cartridge clip 40, and a firing assembly 50.

The housing 10 forms a first receiving space (not shown) extending in the direction of the first straight line 101 and a second receiving space (not shown) extending in the direction of the second straight line 102. Wherein the cylinder 30 is disposed in the first accommodation space and the power output portion 20 is disposed in the second accommodation space. The clip portion 40 is disposed in a direction of a third straight line 103 parallel to the second straight line 102. Nails are installed in the cartridge clip portion 40 and automatically rise to the front end of the firing assembly 50 under the action of the spring. In this embodiment, the direction of the first straight line 101 is perpendicular or nearly perpendicular to the direction of the second straight line 102. The housing 10 is further provided with a mode button 14 for user selection, the mode button 14 being capable of switching the nailing mode of the nail gun 1. Specifically, the user can select the single nailing mode or the continuous nailing mode by setting the mode button 14. The housing 10 is also formed with a grip portion 11 for a user to hold. One end of the handle 11 is connected with a power interface, and the power interface is connected with a battery pack 2 for accessing a direct current or alternating current power supply.

The power output portion 20 includes: a motor 21, a gear box 22, an output shaft 23 and a drive wheel 24. Wherein the motor 21 outputs power and drives the output shaft 23 to rotate in the direction of arrow a in fig. 3 through the gear box 22. The driving wheel 24 is mounted on the output shaft 23, and when the output shaft 23 rotates, the driving wheel 24 is driven to rotate in the direction of arrow a. The drive wheel 24 has a plurality of drive teeth arranged in the circumferential direction thereof. In this embodiment, a tooth missing portion 244 is disposed between the first driving tooth 241 and the second driving tooth 242. The power output section 20 further includes a position detecting device 25 for detecting a position at the time of rotation of the drive wheel 24. Specifically, the position detecting device 25 includes a hall element (not shown) and a magnet (not shown) provided on the driving wheel 24 and rotating in synchronization with the driving wheel 24, the hall element being opposite to the magnet when the firing assembly 50 is in the initial state.

The nail gun 1 further comprises a control module (not shown), a main control switch 12 and a trigger switch 13. The control module is electrically connected with the main control switch 12 and the trigger switch 13. Specifically, a main control switch 12 is provided on the handle portion 11, and the main control switch 12 is provided as a trigger in this embodiment. The trigger switch 13 is used for triggering the nail gun 1 to work. Specifically, the trigger switch 13 includes a trigger lever 131 and a micro switch 132. When used in a nail gun 1, the trigger lever 131 needs to be contacted with the surface of a workpiece, so that the trigger lever 131 is pressed down, and the trigger lever 131 triggers the micro switch 132 to be communicated. The nail gun 1 is started under the condition that the main control switch 12 and the trigger switch 13 are simultaneously in the trigger state. When the user uses the nail gun 1, the control module outputs a driving signal to control the motor 21 to run along the arrow a after detecting that the main control switch 12 and the trigger switch 13 are in the trigger state at the same time. Here, the main control switch 12 and the trigger switch 13 are used only to start the motor 21 in this embodiment. The stopping after the start of the motor 21 depends on the state of the position detection means 25. Specifically, after the motor 21 is started, the driving wheel 24 is rotated by the motor 21, and when the control module detects that the driving wheel 24 has rotated once through the position detecting device 25, a stop signal is output to control the motor 21 to stop rotating, and at this time, the driving wheel 24 returns to the initial position.

The cylinder 30 in the present embodiment is preferably provided as a pre-charge cylinder including an inflation nozzle 31 for pre-charging gas, a cylinder body 32, and an elastic member provided in the cylinder body 32. The elastic element is preferably provided as a membrane 33 in this embodiment. Specifically, the diaphragm 33 is made of a material having good sealing property and elasticity, and is usually made of rubber. The cylinder 32 and the diaphragm 33 are formed with a first chamber 30a and a second chamber 30b distributed in the direction of the first straight line 101. Wherein the diaphragm 33 is located between the first chamber 30a and the second chamber 30b. After the pre-inflation of the air cylinder 30 is completed through the inflation nozzle 31, the gas in the first chamber 30a is not communicated with the outside air, and the gas in the first chamber 30a is not communicated with the gas in the second chamber 30b.

The firing assembly 50 is partially disposed within the cylinder 30, and the cylinder 30 is capable of applying work to the firing assembly 50 through the diaphragm 33 to cause movement thereof in a direction along the first line 101. Specifically, the firing assembly 50 includes a piston 51, a firing pin 52 fixedly coupled to the piston 51, and a bumper 53.

A buffer 53 is provided at an end of the cylinder 32 remote from the first chamber 30a for buffering the firing assembly 50 during reciprocation.

One side of the striker 52 is provided with a plurality of transmission teeth uniformly arranged in the direction of the first straight line 101. Specifically, the gear teeth include a first gear tooth 521 and a second gear tooth 522. The firing assembly 50 also includes a stop 54 fixedly coupled to the firing pin 52, the stop 54 being disposed between the first gear 521 and the second gear 522. When the firing assembly 50 is in the initial position, the first transfer tooth 521 is engaged with the first drive tooth 241 on the drive wheel 24 and the stop 54 is positioned between the first and third drive teeth 241, 243 of the drive wheel 24. Firing assembly 50 also includes a guide 55 disposed along a first line 101. The guide 55 is mounted on the striker 52 in a clearance fit, and guides the striker 52 during reciprocation, thereby protecting the striker 52 from deviation from the motion path.

The piston 51 is disposed in the second chamber 30b and is capable of reciprocating in the second chamber 30b. In this embodiment, the inner diameter of the second chamber 30b is 20mm or more and 55mm or less. Further, the inner diameter of the second chamber 30b is 25mm or more and 35mm or less. Specifically, the piston 51 includes a first portion 511 and a second portion 512. Wherein a groove (not shown) is provided in the side of the second portion 512 adjacent to the first portion 511, and the first portion 511 is fitted in the groove in a clearance fit. It should be noted that the first portion 511 and the second portion 512 of the piston 51 may be integrally formed. The first portion 511 of the piston 51 has a force with the diaphragm 33 in the direction of the first line 101. In the present embodiment, the sum of the masses of the piston 51 and the striker 52 is 50g or more and 150g or less. Further, the sum of the masses of the piston 51 and the striker 52 is 60g or more and 80g or less.

Next, the process of completing one nailing by the nail gun 1 will be described in detail.

When the user presses the main control switch 12 and the trigger switch 13 is in the trigger state, the control module controls the motor 21 to start. The driving wheel 24 is driven by the motor 21 to rotate in the direction of arrow a, so that the first driving tooth 241 pushes the limiting member 54 to move in the direction of arrow b. Because the stopper 54 is fixedly connected with the striker 52, the striker 52 moves in the direction of arrow b under the pushing of the stopper 54, and the piston 51 pushes the diaphragm 33 under the pushing of the striker 52, so that the diaphragm is continuously elastically deformed in the direction of arrow b, and the motor 21 applies work to the cylinder 30. When the driving wheel 24 rotates in the direction of arrow a for a very short time, the first driving tooth 241 is disengaged from the stop member 54, and then the stop member 54 is located at the tooth missing portion 244 on the driving wheel 24, the driving wheel 24 stops working on the firing assembly 50, and the piston 51 reaches the top dead center position. When the piston 51 is at the top dead center position of the cylinder 30, the volume in the first chamber 30a is minimized.

It should be noted that, as described in detail above, the initial position of the striker 52, when the striker 52 is in the initial position, the piston 51 is positioned near the top dead center position of the cylinder 30, the diaphragm 33 has been deformed in the direction of arrow b, and the gas in the first chamber 30a has been at a relatively high pressure. At this time, the first driving tooth 241 on the driving wheel 24 is in engagement with the first gear tooth 521 on the striker 52, and the stopper 54 is located between the first gear tooth 241 and the third gear tooth 243. Since the motor 21 is provided to rotate only in the arrow a direction, when the striker 52 is at the initial position, the striker 52 does not move in the arrow c direction even if there is already a large gas pressure in the first chamber 30 a.

When the piston 51 reaches the top dead center position of the cylinder 30, i.e., the firing assembly 50 is in the released position, the stop 54 is located at the tooth segment 244 on the drive wheel 24 and the motor 21 no longer applies work to the firing assembly 50. The firing assembly 50 is then acted upon by the air cylinder 30. Specifically, under the influence of the pressure of the gas in the first chamber 30a, the diaphragm 33 exerts a force on the piston 51 in the direction of arrow c, so that the firing assembly 50 has an increased initial acceleration in the direction of arrow c. The firing assembly 50 is moved in the direction of arrow c under the urging force, so that the nails in the cartridge clip portion 40 are driven into the work piece to perform the fastening function. When the firing assembly 50 is in the release position, the stop member 54 is at the front end of the tooth segment 244, and when the firing assembly 50 is at the end of the movement in the direction of arrow c, i.e., the firing motion, the stop member 54 is at the rear end of the tooth segment 244, and the piston 51 is at the position of the bottom dead center 35b as shown in fig. 5. In the present embodiment, when the piston 51 is at the bottom dead center 35b, the volume of the first chamber 30a is 120mL or more and 360 mL or less. Further, the volume of the first chamber 30a is 180 or more mL and 230 or less mL. In the present embodiment, when the nail gun 1 is in the nailing process, the piston stroke of the piston 51 is 70mm or more and 110mm or less. Further, the piston stroke is 80mm or more and 90mm or less. The piston stroke refers to a stroke between the piston 51 and the bottom dead center 35b from the top dead center, or a stroke between the piston 51 and the top dead center from the bottom dead center 35 b.

Next, the firing assembly 50 is again moved in the direction of arrow b by the cylinder 30 and the stored energy is actuated. During the energy storage process, the second driving teeth 242 and the second driving teeth 522 start to be engaged until the first driving teeth 241 and the first driving teeth 521 are engaged. After the motor 21 is started, the control module detects the position of the driving wheel 24 in real time through the position detection device 25, and when detecting that the driving wheel rotates once after the motor 21 is started, the control module outputs a control signal to turn off the motor 21. After the motor 21 is turned off, the firing assembly 50 is again in the initial position, and the nailing process is completed by the nailing gun 1.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the utility model in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the utility model.

Claims

1. A nail gun, comprising:

a housing;

a clip portion for receiving a fastener;

a firing assembly disposed within the housing for impacting the fastener;

the power output part is connected with the firing assembly to drive the firing assembly to move;

the cylinder extends along the first linear direction and is arranged in the extending direction of the firing assembly;

it is characterized in that the method comprises the steps of,

the cylinder includes at least an elastic element that acts with the firing assembly in the first linear direction.

2. The nailer of claim 1 wherein:

the cylinder further comprises a cylinder body, the elastic element and the cylinder body are formed with a first chamber and a second chamber which are distributed along the first linear direction, and the elastic element is located between the first chamber and the second chamber.

3. The nailer of claim 2 wherein:

the gas in the first chamber is not communicated with the gas in the second chamber; the volume of the first chamber or the second chamber changes with the change of the deformation amount of the elastic element in the first linear direction.

4. A nail gun according to claim 3, characterized in that:

the firing assembly includes:

a piston disposed within the second chamber;

the firing pin is connected with the piston and drives the piston to reciprocate in the second cavity along the first linear direction; the firing pin is provided with driving teeth.

5. The nailer of claim 4 wherein:

the gas in the first chamber can push the elastic element to do work on the piston.

6. The nailer of claim 1 wherein:

the cylinder is a film type cylinder, and the elastic element is a diaphragm.

7. The nailer of claim 4 wherein:

the power output part at least comprises a motor and a driving wheel driven by the motor, wherein the driving wheel is provided with transmission teeth, and the transmission teeth can be meshed with the driving teeth.

8. The nailer of claim 1 wherein:

the nail gun is provided with a trigger switch and a main control switch arranged on the shell, and the trigger switch comprises a trigger rod and a micro switch.

9. The nailer of claim 8 wherein:

when the trigger switch and the main control switch are in a trigger state at the same time, the nailing gun can complete a nailing function.

10. The nailer of claim 1 wherein:

the casing is provided with a mode button for a user to select, and the mode button can switch the nailing mode of the nailing gun.

11. A power tool, comprising:

a housing;

a functional element for implementing the function of the electric tool;

a firing assembly disposed within the housing for impacting the functional element;

the air cylinder can push the firing assembly to move;

it is characterized in that the method comprises the steps of,

the cylinder includes at least an elastic element that acts with the firing assembly in a first linear direction.

12. The power tool of claim 11, wherein:

13. The power tool of claim 12, wherein:

14. The power tool of claim 13, wherein:

the cylinder is a film type cylinder, and the elastic element is a diaphragm.

15. The power tool of claim 11, wherein:

including but not limited to a nail gun, electric hammer, or electric pick.