A drive wheel, drive mechanism and nail gun

Abstract

The present application relates to the field of decoration tools, in particular to a driving wheel, a driving mechanism and a nail gun, the driving wheel is characterized in that it is arranged on a driving motor of the nail gun and can rotate under the driving of the driving motor, and can be used for engaging transmission with a striker of the nail gun, and the driving wheel comprises: a rotating part for being driven by the driving motor to rotate; a plurality of pin gears arranged on the rotating part for engaging transmission with the striker, wherein the pin gears comprise a release position pin gear which is in sliding connection with the rotating part; and an elastic assembly arranged between the release position pin gear and the rotating part, and the rotating part is provided with a movable hole for movement of the release position pin gear; because the movable hole for movement of the release position pin gear and the elastic assembly are arranged, the striker avoids excessive friction with the release position pin gear in an instant of release, thereby avoiding wear of the teeth and the release position pin gear.

Description

Technical Field

[0001] This invention relates to the field of decoration tools, specifically to a drive wheel, a drive mechanism, and a nail gun. Background Technology

[0002] A nail gun is a fastening tool, mostly used in construction. Currently, nail guns use a drive motor and corresponding transmission structure to push a piston, which in turn compresses a power spring or compressed gas to store energy. When firing a nail, the power spring or air pressure drives the piston to move, which in turn drives the firing pin mounted on the piston to strike and shoot out the nail, thus achieving nailing.

[0003] The aforementioned transmission structure includes a drive mechanism, which comprises a drive wheel and a firing pin that meshes with the drive wheel. The drive wheel is provided with a toothed pin, and the firing pin is provided with a toothed structure that meshes with the toothed pin. The drive motor drives the drive wheel to rotate, which in turn drives the firing pin to rise and store energy. When the drive wheel rotates past the position of the last toothed pin, the firing pin is released and then drives the nail. At the moment of release, the toothed structure will cause wear on the last toothed pin. Under long-term operation (after 10,000 impacts in the experiment), the last toothed pin is prone to breakage, causing a safety hazard. Furthermore, this wear reduces the service life of the nail gun. Summary of the Invention

[0004] This invention is made to solve the above-mentioned problems, and aims to provide a drive wheel, a drive mechanism, and a nail gun to solve the problem that the last toothed pin is prone to wear and breakage.

[0005] This invention provides a drive wheel, characterized by being mounted on a drive motor of a nail gun and rotating under the drive of the drive motor, for engagement and transmission with the firing pin of the nail gun. It comprises: a rotating component for being driven to rotate by the drive motor; a plurality of toothed pin components mounted on the rotating component for engagement and transmission with the firing pin, the toothed pins including a release pin slidably connected to the rotating component; and an elastic component disposed between the release pin and the rotating component, the rotating component having a movable hole for the release pin to move.

[0006] The drive wheel provided by the present invention may also have the following features: the rotating component has a receiving cavity for installing a spring, and the elastic component has: a spring, one end of which is placed in the receiving cavity, and the other end which acts on the release pin.

[0007] The drive wheel provided by the present invention may also have the following feature: wherein the movable hole is an arc-shaped elongated hole.

[0008] The drive wheel provided by the present invention may also have the following features: wherein the elastic component further includes: a top block, located between the spring and the release pin, the top block having a limiting hole for the spring to be inserted or a limiting post for the spring to be sleeved on the side facing the spring; and the top block having an abutment surface that contacts the release pin at one end.

[0009] The drive wheel provided by the present invention may also have the following feature: the rotating component is provided with a clearance opening.

[0010] The drive wheel provided by the present invention may also have the following feature: wherein the plurality of toothed pins further include: a first toothed pin, and the clearance opening is located between the release toothed pin and the first toothed pin.

[0011] The drive wheel provided by the present invention may also have the following features: it further includes a second elastic component, which includes a second spring, one end of which acts on the rotating component and the other end of which acts on the first toothed pin. The rotating component has a second receiving cavity for installing the second spring and for accommodating the second spring. The rotating component also has a second movable hole for moving the first toothed pin.

[0012] The drive wheel provided by the present invention may also have the following feature: the extending direction of the second movable hole is parallel to the extending direction of the second receiving cavity.

[0013] The present invention also provides a drive mechanism having the features of being disposed on a nail gun, comprising at least a drive wheel and a firing pin.

[0014] The present invention also provides a nail gun having the feature of including at least a drive mechanism.

[0015] The role and effect of invention

[0016] According to the present invention, a drive wheel is provided with a movable hole for the release pin to move and an elastic component, so that the impact pin avoids excessive friction between the impact pin and the release pin at the moment of release, thereby avoiding wear on the teeth and wear on the release pin.

[0017] Furthermore, the movable hole is an arc-shaped elongated hole. When the release pin contacts the teeth of the firing pin, the teeth of the firing pin and the release pin abut against the end of the movable hole, and the release pin is in a stable stress state, preventing the firing pin from being released prematurely.

[0018] Furthermore, the top block can slide and extend within the receiving cavity, and after the firing pin is released and driven into place, the extension of the spring causes the release pin to reset.

[0019] Furthermore, the design of the clearance reduces the material used in rotating parts, thereby reducing production costs. When the firing pin is released to drive the nail, the clearance also provides sufficient clearance space for the firing pin. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the drive mechanism and part of the nail gun in an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Sectional view in;

[0022] Figure 3 This is a schematic diagram of the drive mechanism and part of the nail gun in an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 A sectional view;

[0024] Figure 5 This is a partial cross-sectional view of the drive mechanism in an embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional view of the drive mechanism before the firing pin is released in an embodiment of the present invention;

[0026] Figure 7 This is an exploded view of the drive wheel in an embodiment of the present invention; and

[0027] Figure 8 This is a cross-sectional view of the rotating component in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 1-Drive mechanism; 2-Piston chamber; 10-Drive wheel; 20-Striking pin; 30-Piston; 11-Rotating component; 12-Geared pin component; 13-Elastic component; 14-Second elastic component; 111-Moving hole; 112-Receiving cavity; 113-Clearing opening; 121-Release pin; 122-First pin; 131-Spring; 132-Top block; 1321-Abutting surface; 141-Second spring; 114-Second receiving cavity; 115-Second moving hole. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate a drive wheel, drive mechanism and nail gun of the present invention.

[0030] Reference Figures 1 to 4The nail gun includes: a nail gun body, a nozzle, a nail magazine assembly, and a drive motor. The drive motor is connected to the drive mechanism 1 through a reduction and torque amplification device. The drive mechanism 1 includes at least: a drive wheel 10 and a firing pin 20. The drive wheel 10 and the firing pin 20 are engaged for transmission. The nail gun body is provided with an energy storage mechanism, which can be a compressed spring or compressed gas for energy storage. One end of the firing pin is connected to a piston 30. During the upward movement of the firing pin 20, it pulls the piston to move, thereby compressing the power spring or compressed gas to store energy. When nailing, the power spring or air pressure drives the piston to move, thereby driving the firing pin 20 mounted on the piston to strike and shoot out the nail, thus achieving nailing.

[0031] Specifically, the main body of the nail gun has a piston chamber 2, and the piston 30 is installed in the piston chamber 2 and can slide in the piston chamber 2.

[0032] The drive wheel 10 is connected to the drive motor of the nail gun, and the drive wheel 10 rotates under the drive of the drive motor, thereby driving the firing pin 20 to rise and store energy.

[0033] Specifically, the drive wheel 10 includes a rotating component 11 and several toothed pin components 12. The rotating component 11 is connected to a drive motor and rotates under the drive of the drive motor. The toothed pin components 12 are disposed on the rotating component 11, and the several toothed pin components 12 are arranged circumferentially. Each toothed pin component 12 includes a release pin 121 and a first pin 122. The several toothed pin components between the first pin 122 and the release pin 121 are equidistantly distributed. The striker 20 is provided with a toothed structure, and the toothed structure meshes with the toothed pin components 12 for transmission. When the drive motor is working, the first pin 122 contacts the teeth on the striker 20 (refer to...). Figure 1 and Figure 2 The firing pin 20 begins to rise and store energy, as the rotating component 11 continues to rotate (see reference). Figure 1 and Figure 2 (in the direction of arrow a), and then the firing pin 20 continues to rise (refer to...) Figure 1 and Figure 2 (The direction of arrow b in the image).

[0034] Piston 30 rises to store energy, by Figure 1 The state changes to Figure 3 The state continues until the release pin 121 abuts against the teeth of the firing pin 20 (refer to...). Figure 4 (In the state); the rotating part 11 continues to rotate, the firing pin 20 is released from the restraint of the release position toothed pin 121, the energy storage mechanism is released, and pushes the firing pin 20 to descend and extend, thereby realizing nailing (the extension direction of the firing pin refers to...). Figure 6 Arrow c).

[0035] Furthermore, refer to Figures 5 to 8The release pin 121 is slidably connected to the rotating component 11, and the rotating component 11 has a movable hole 111 for the release pin 121 to move. An elastic component 13 is provided between the release pin 121 and the rotating component 11. The elastic component 13 has a spring 131, one end of which acts on the rotating component 11 and the other end of which acts on the release pin 121. A receiving cavity 112 for installing the spring is provided inside the rotating component 11. Specifically, refer to... Figure 7 The outer periphery of the rotating component 11 is provided with an inwardly recessed annular groove. On both sides of the annular groove are mounting holes for mounting the toothed pin component 12. The mounting hole on one side of the annular groove is a through hole, and the mounting hole on the other side of the annular groove is a countersunk hole. The toothed pin component 12 passes through the through hole and then is inserted into the countersunk hole to realize the connection between the toothed pin component and the rotating component. The movable hole 111 is divided into two parts: one part is a through elongated hole, and the other part is a countersunk elongated hole, which are respectively provided on both sides of the annular groove. The release position toothed pin 121 passes through the through elongated hole and then is inserted into the countersunk elongated hole, and can move within the movable hole. Spring 131 is installed in receiving cavity 112. One end of spring 131 abuts against the inside of receiving cavity 112, and the other end abuts against release position pin 121. When the pressure between the teeth on the striker 20 and the release position pin 121 is too great, the release position pin 121 can retract and release the striker 20. At the moment of release, the striker avoids excessive friction between the striker and the release position pin, thereby avoiding wear on the teeth and the release position pin.

[0036] Furthermore, the movable hole 111 is an arc-shaped elongated hole, and the center of this arc-shaped elongated hole is located on the side close to the first toothed pin. The advantage of this arc design is that when the release toothed pin 121 contacts the teeth of the firing pin 20, the teeth of the firing pin 20 and the release toothed pin 121 abut against the end of the movable hole 111, and the release toothed pin 121 is in a stable force-bearing state (see reference). Figure 5 (in the state of...) to prevent the striking pin 20 from being released prematurely; the rotating part 11 continues to rotate, the striking pin 20 continues to rise, the energy stored at the piston 30 continues to increase, and thus the contact pressure between the teeth of the striking pin 20 and the release position pin 121 is greater, until the reference... Figure 6 When the release pin 121 retracts, it compresses the spring 131, and the firing pin 20 is released to drive the nail.

[0037] Furthermore, the elastic component 13 also includes: a top block 132, located between the spring 131 and the release pin 121. The top block 132 is provided with a limiting hole for the spring to be inserted or a limiting post for the spring to be sleeved on the side facing the spring 131. The top block 132 is provided with a contacting surface 1321 at one end facing the release pin 121. The top block 132 can slide telescopically within the receiving cavity 112. After the striker 20 is released and nailed, the extension of the spring 131 causes the release pin 121 to reset.

[0038] The rotating component 11 is provided with a clearance opening 113, which is located between the release position toothed pin 121 and the first toothed pin 122. The design of the clearance opening 113 reduces the material used in the rotating component 11, thereby reducing production costs. When the firing pin 20 releases to drive the nail, the clearance opening 113 also provides sufficient clearance space for the firing pin 20.

[0039] Furthermore, the drive wheel 10 also includes a second elastic component 14, which includes a second spring 141, one end of which acts on the rotating component 11 and the other end of which acts on the first toothed pin 122. The rotating component 11 has a second receiving cavity 114 for mounting the second spring 141, and the rotating component 11 has a second movable hole 115 for the first toothed pin to move. After the striker 20 is driven, when it needs to store energy again, the first toothed pin 122 needs to re-engage with the striker 20. However, the striker 20 cannot be guaranteed to be in the predetermined engagement position, which will cause the first toothed pin 122 to collide and rub violently with the striker 20. Therefore, the movable setting of the first toothed pin 122 and the design of the second elastic component 14 make the first toothed pin retract during collision and violent friction, avoiding wear on the striker 20 and the first toothed pin due to friction. During the rotation of the drive wheel 10, the second spring 141 extends to fully engage the first toothed pin 122 with the teeth on the striker 20.

[0040] Furthermore, the extension direction of the second movable hole 115 is parallel to the extension direction of the second receiving cavity 114.

[0041] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A drive wheel, mounted on a drive motor of a nail gun and rotatable under the drive of the drive motor, for engaging and transmitting power with the firing pin of the nail gun, characterized in that, include: A rotating component, used to be driven by the drive motor to rotate; Several toothed pin components are disposed on the rotating component for engaging and driving the firing pin. Each toothed pin component includes a release pin, which is slidably connected to the rotating component. An elastic component is disposed between the release pin and the rotating component. Furthermore, the rotating component is provided with a movable hole for the release pin to move.

2. The drive wheel according to claim 1, characterized in that: in, The rotating component has a receiving cavity for installing the elastic component. The elastic component has: a spring, one end of which is placed in the receiving cavity, and the other end which acts on the release position toothed pin.

3. The drive wheel according to claim 2, characterized in that: in, The movable hole is an arc-shaped elongated hole.

4. The drive wheel according to claim 3, characterized in that: in, The resilient component also includes: The top block is located between the spring and the release pin. The top block is provided with a limiting hole for the spring to be inserted or a limiting post for the spring to be sleeved on the side facing the spring; The top block has an abutment surface at one end facing the release pin that contacts the release pin.

5. The drive wheel according to claim 1, characterized in that: in, The rotating component is provided with a clearance opening.

6. The drive wheel according to claim 5, characterized in that: in, Several of the toothed pin components include: a first toothed pin, located in a first engagement position that engages with the firing pin. The clearance opening is located between the release pin and the first pin.

7. The drive wheel according to claim 6, characterized in that, Also includes: The second elastic component includes a second spring, one end of which acts on the rotating component, and the other end of which acts on the first toothed pin. The rotating component has a second receiving cavity for mounting the second spring, and a second movable hole for moving the first toothed pin.

8. The drive wheel according to claim 7, characterized in that: in, The extension direction of the second movable hole is parallel to the extension direction of the second receiving cavity.

9. A driving mechanism, disposed on a nail gun, characterized in that, It includes at least: a drive wheel and a firing pin, wherein the drive wheel is the drive wheel as described in any one of claims 1-8.

10. A nail gun, characterized in that, At least including: A drive mechanism, wherein the drive mechanism is the drive mechanism as described in claim 9.

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