A drive for a nail gun

Abstract

The utility model provides a kind of transmission device of nailing gun, belong to the technical field of nailing gun.It solves how to make the lock of striker at the same time avoid the wear of nailing gun striker.A kind of transmission device of nailing gun, the transmission device including one-way housing and be set on one-way housing for the transmission part for making the lift of striker, the transmission part and one-way housing between being equipped with the one-way piece for making the one-way rotation of transmission part in one-way housing, it is characterized in that, the one-way housing is also connected with for limiting one-way piece and transmission part in one-way housing on limiting piece.This scheme, in transmission device, setting mutually coordinated transmission part, one-way housing and one-way piece, need not to set locking device again at striker, also need not to set locking structure on striker again in locking device cooperation, avoid the wear of striker due to locking.

Description

Technical Field

[0001] This utility model belongs to the technical field of nail guns and relates to a transmission device for a nail gun. Background Technology

[0002] Electric nail guns typically use compressed gas as a power source. During nailing, the motor, powered by electricity (such as a replaceable battery), drives a lifting mechanism. This mechanism raises the firing pin and compresses a gas spring. After the firing pin reaches a preset position, it is released, and the pin then uses the spring force to drive the nail. The motor continues to rotate, and the firing pin is repeatedly raised and driven. In existing technology, once the firing pin reaches the preset position, it is locked by a locking device. When nailing is needed, the locking device unlocks, and the firing pin drives the nail under the pressure of compressed gas. This locking device requires additional design space, and a locking structure must be incorporated into the firing pin to cooperate with the locking device, making the firing pin prone to wear during frequent nailing. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a transmission device for a nail gun. The technical problem to be solved by this invention is: how to lock the firing pin while preventing wear on the nail gun firing pin.

[0004] The purpose of this utility model can be achieved through the following technical solution: a transmission device for a nail gun, the transmission device comprising a one-way housing and a transmission component disposed on the one-way housing for lifting the firing pin, wherein a one-way component is provided between the transmission component and the one-way housing for allowing the transmission component to rotate unidirectionally within the one-way housing, characterized in that a limiting component for restricting the one-way component and the transmission component on the one-way housing is further connected to the one-way housing.

[0005] In this design, the transmission component in the transmission device rotates within the one-way housing to lift the firing pin to a predetermined position. When the firing pin reaches the predetermined position, the gas in the cylinder inside the nail gun is compressed, and the firing pin is subjected to the high-pressure gas. The power of the transmission device is disconnected, and the firing pin tends to drive the transmission component to rotate. At this time, the one-way component can limit the rotation of the transmission component, thus holding the firing pin in the predetermined position when the power of the transmission device is disconnected. The specific installation method of the transmission component is as follows: first, the transmission component is installed inside the one-way housing; then, the one-way component is installed between the transmission component and the one-way housing; then, the limiting component is connected to the one-way housing to prevent the transmission component and the one-way component from detaching from the one-way housing; finally, the transmission component is connected to the remaining structures in the transmission device. By setting mutually cooperating transmission components, one-way housings, and one-way components in the transmission device, there is no need to set a locking device at the firing pin, nor is there a need to set a locking structure on the firing pin that cooperates with the locking device, thus avoiding wear on the firing pin caused by locking. By confining the transmission components, one-way components, and one-way housing within the one-way housing, the installation of these components and the housing is facilitated. It also facilitates the installation of the transmission components and other structures within the transmission device, preventing the one-way components from detaching from the one-way housing during installation.

[0006] In the aforementioned transmission device for a nail gun, the one-way housing is annular, and one end of the one-way housing extends towards its center to form a baffle that limits the movement of the transmission component. The limiting component is plate-shaped and located below the one-way housing, and is fixedly connected to the one-way housing. The one-way housing and the baffle are integrally formed, and the baffle limits the movement of the transmission component and facilitates the installation of the limiting component.

[0007] In the aforementioned transmission device for a nail gun, the transmission component has outwardly extending protrusions on its sidewall, and a one-way groove is provided on the transmission component. The one-way groove is disposed between the protrusions, and the one-way component is cylindrical and located within the one-way groove. The protrusions and the one-way component are located between a limiting member and a baffle. Positioning the one-way component between the limiting member and the baffle restricts its vertical movement or tilting.

[0008] In the aforementioned transmission device for a nail gun, the one-way groove gradually increases in one direction. When the transmission component rotates relative to the one-way housing in the direction where the one-way groove gradually decreases, the one-way component is freely located within the one-way groove, allowing the transmission component to rotate in that direction. When the transmission component rotates relative to the one-way housing in the direction where the one-way groove gradually increases, the one-way component is squeezed between the transmission component and the one-way housing to achieve engagement and prevent the transmission component from rotating in that direction.

[0009] In the aforementioned transmission device for a nail gun, the transmission device further includes a first planetary gear mechanism, which is connected to the transmission component and drives the transmission component to rotate. The first planetary gear mechanism includes a first planetary gear housing, and the limiting component is located between the one-way housing and the first planetary gear housing.

[0010] In the aforementioned transmission device for a nail gun, the lower end of the transmission component body passes through a limiting member and is connected to a first planetary gear mechanism, the upper end of the transmission component body passes through a baffle, and the transmission component body is also provided with an output gear, which is connected to a second planetary gear mechanism.

[0011] In the aforementioned transmission device for a nail gun, a cover plate is fixedly connected to the one-way housing, and the cover plate cooperates with a limiting member to confine the one-way member and the transmission member within the one-way housing.

[0012] Compared with the prior art, the present invention has the following advantages: 1. In this solution, the transmission device is equipped with mutually cooperating transmission components, one-way housing and one-way components, eliminating the need for a locking device at the firing pin, and eliminating the need for a locking structure on the firing pin that cooperates with the locking device, thus avoiding wear of the firing pin caused by locking.

[0013] 2. In this solution, the transmission component, one-way component, and one-way housing are confined within the one-way housing by limiting the movement, which facilitates the installation of the transmission component, one-way component, and one-way housing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is an exploded structural diagram of the transmission device of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is an exploded structural diagram of the transmission device of this utility model; Figure 6 This is a cross-sectional structural diagram of the present invention; Figure 7 This is a cross-sectional structural diagram of the present invention; In the diagram, 1 is a transmission component; 1a is a protrusion; 1b is a one-way groove; 1c is an output gear; 2 is a one-way housing; 2a is a baffle; 3 is a limiting component; 4 is a first planetary gear mechanism; 5 is a second planetary gear mechanism; 6 is a motor; 7 is a one-way component; 8 is a cylinder; 9 is a piston; 10 is a striking pin; 10a is a protrusion; 11 is a rotating disk; 11a is a ratchet; 12 is a locking pin; 13 is a mounting base; 14 is a transmission shaft; 15 is a connecting base; 16 is a pawl; 16a is the head end; 16b is the tail end; 17 is a disengagement element; and 18 is a return spring. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example

[0016] like Figures 1-4 As shown, this embodiment discloses a nail gun, which includes a cylinder 8, a piston 9 slidably disposed within the cylinder 8, and a striking pin 10 fixedly connected to the piston 9. The cylinder 8 and piston 9 form a sealed compression chamber inside the cylinder 8 for storing and releasing compressed air to drive the movement of the piston 9. The striking pin 10 is fixedly connected to the piston 9, ensuring that under the action of high-pressure gas on the piston 9, the striking pin 10 moves synchronously with the piston 9, striking the nail to achieve the nailing function. Several protrusions 10a are arranged in an array along the axial direction of the striking pin 10. These protrusions 10a are used to cooperate with the locking pins 12 on the rotating disk 11 to realize the movement of the piston 9 within the cylinder 8 and compress the gas within the cylinder 8.

[0017] like Figure 3 and Figure 4The nail gun shown also includes a firing pin 10 drive assembly, which is mounted on a mounting base 13. The firing pin 10 drive assembly includes the aforementioned rotating disk 11, which is rotatably mounted on a drive shaft 14. The rotating disk 11 has several circumferentially arranged locking pins 12 that engage with protrusions 10a to lift the firing pin 10. The shape of each locking pin 12 matches the protrusion 10a on the firing pin 10, ensuring a tight and effective engagement, thereby converting the rotational motion of the drive shaft 14 into the linear motion of the piston 9 and the firing pin 10. A connecting seat 15 is fixedly connected to the drive shaft 14, and pawls 16 arranged centrally symmetrically are hinged to both ends of the connecting seat 15. A ratchet 11a that engages with the pawls 16 is also provided on the rotating disk 11. The mounting base 13 is provided with disengagement elements 17 corresponding to the two pawls 16. The pawls 16 have a head end 16a that can engage with the tooth surface of the ratchet 11a and a tail end 16b that can form an abutment engagement with the disengagement element 17. The tail ends 16b on the two pawls 16 are vertically offset so that they can only engage with their corresponding disengagement elements 17 during rotation. When it is necessary to disengage the pawls 16 and the ratchet 11a, the corresponding disengagement element 17 contacts the tail end 16b of the pawl 16, forcing the head end 16a of the pawl 16 to lift off the tooth surface of the ratchet 11a, thereby disengaging the engagement.

[0018] To ensure that the pawl 16 can always be in close contact with the tooth surface of the ratchet 11a and can quickly return to its original position even after being subjected to external force, a return spring 18 is installed on the connecting seat 15. When the pawl 16 is not subjected to external force, the return spring 18 can restore its original state and thus force the pawl 16 back to the position of engaging with the ratchet 11a.

[0019] like Figure 5-7 As shown, the nail gun also includes a transmission device for rotating the drive shaft 14. The transmission device is connected to a power device, and in this embodiment, the power device is a motor 6. The transmission device includes a one-way housing 2 and a transmission member 1 disposed on the one-way housing 2. A one-way member 7 is provided between the transmission member 1 and the one-way housing 2 to allow the transmission member 1 to rotate unidirectionally within the one-way housing 2. A limiting member 3 is also connected to the one-way housing 2 to restrict the one-way member 7 and the transmission member 1 on the one-way housing 2. The one-way housing 2 is annular and one end extends towards its center to form a baffle 2a. The limiting member 3 is plate-shaped and located below the one-way housing 2 and is fixedly connected to the one-way housing 2.

[0020] The transmission component 1 has an outwardly extending protrusion 1a on its side wall and a one-way groove 1b on its side. The one-way groove 1b is positioned between the protrusions 1a. A cylindrical one-way component 7 is located within the one-way groove 1b. The protrusions 1a and the one-way component 7 are located between the limiting component 3 and the baffle 2a. The one-way groove 1b gradually increases in one direction. When the transmission component 1 rotates relative to the one-way housing 2 in the direction where the one-way groove 1b gradually decreases, the one-way component 7 is freely positioned within the one-way groove 1b, allowing the transmission component 1 to rotate in that direction. When the transmission component 1 rotates relative to the one-way housing 2 in the direction where the one-way groove 1b gradually increases, the one-way component 7 is pressed between the transmission component 1 and the one-way housing 2 to achieve meshing and prevent the transmission component 1 from rotating in that direction. The transmission device also includes a first planetary gear mechanism 4, which is connected to the transmission component 1 and drives the transmission component 1 to rotate. The first planetary gear mechanism 4 includes a first planetary gear housing, and the limiting component 3 is located between the one-way housing 2 and the first planetary gear housing.

[0021] The lower end of the main body of the transmission component 1 passes through the limiting member 3 and connects to the first planetary gear mechanism 4. The upper end of the main body of the transmission component 1 passes through the baffle 2a. The main body of the transmission component 1 is also provided with an output gear 1c, which is connected to the second planetary gear mechanism 5. A cover plate is fixedly connected to the one-way housing 2. The cover plate cooperates with the limiting member 3 to restrict the one-way component 7 and the transmission component 1 within the one-way housing 2.

[0022] The working process of this embodiment is described in detail below: In the initial state, piston 9 is in the initial position of cylinder 8, and firing pin 10 is in the state of compressing piston 9. At this time, return spring 18 forces the head end 16a of pawl 16 to maintain engagement with the tooth surface of ratchet 11a. During the power input phase, the motor 6 starts and drives the transmission component 1 to work. Specifically, the output shaft of the motor 6 drives the first planetary gear mechanism 4 to rotate, and the rotation of the first planetary gear mechanism 4 drives the transmission component 1 to rotate. In this embodiment, from a top view, when the transmission component 1 rotates relative to the one-way housing 2 in a direction that gradually decreases in size towards the one-way groove 1b, the one-way component 7 is freely located in the one-way groove 1b to allow the transmission component 1 to rotate in that direction. The transmission component 1 drives the transmission shaft 14 to rotate through the second planetary gear mechanism 5. The transmission shaft 14 drives the pawl 16 to rotate synchronously through the connecting seat 15. Since the head end 16a of the pawl 16 meshes with the ratchet 11a, the rotating disk 11 rotates synchronously with the transmission shaft 14. The locking pin 12 pushes the protrusion 10a of the striker 10, which drives the piston 9 to compress the air in the cylinder 8. During the power input stop phase, when the motor 6 stops, the piston 9, under the action of high-pressure gas, tends to move in the direction of nailing. At this time, the piston 9 will drive the striker 10 to move, the striker 10 will drive the rotating disk 11 to rotate, the rotating disk 11 will drive the transmission shaft 14 to rotate, and the transmission shaft 14 will drive the transmission component 1 to rotate relative to the one-way housing 2 in the direction of gradually increasing one-way groove 1b. At this time, the one-way component 7 is squeezed between the transmission component 1 and the one-way housing 2 to achieve engagement and prevent the transmission component 1 from rotating in this direction, and the striker 10 is in a locked state.

[0023] During the disengagement triggering phase, motor 6 rotates in its original direction, and the tail end 16b of pawl 16 abuts against the corresponding disengagement element 17. Due to the vertical misalignment of the two pawls 16, they simultaneously trigger the disengagement action. The abutment force forces pawl 16 to deflect around the hinge point, and the head end 16a disengages from the tooth surface of ratchet 11a, thus disengaging the linkage between rotating disk 11 and drive shaft 14. During the nailing and resetting phases, the high-pressure gas inside cylinder 8 pushes piston 9 in the opposite direction, causing striker 10 to extend rapidly and complete the nailing action. As striker 10 retracts, protrusion 10a, via latch 12, drives rotating disk 11 to rotate freely in the opposite direction until piston 9 returns to its initial position. Reset spring 18 then returns to its original state through its own elasticity, forcing the head end 16a of pawl 16 to re-engage with ratchet 11a, preparing for the next drive. Example

[0024] This embodiment is basically the same as the first embodiment in terms of structure. The only difference is that the baffle structure is removed from the one-way housing. A cover plate is fixedly connected to the one-way housing. The cover plate cooperates with the limiting member to restrict the one-way member and the transmission member within the one-way housing.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as 1. transmission component; 1a. protrusion; 1b. one-way groove; 1c. output gear; 2. one-way housing; 2a. baffle; 3. limiting component; 4. first planetary gear mechanism; 5. second planetary gear mechanism, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A transmission device for a nail gun, the transmission device comprising a one-way housing and a transmission component disposed on the one-way housing, wherein a one-way component is provided between the transmission component and the one-way housing to allow the transmission component to rotate unidirectionally within the one-way housing, characterized in that, The unidirectional housing is also connected to a limiting member for confining the unidirectional component and the transmission component on the unidirectional housing.

2. The transmission device for a nail gun according to claim 1, characterized in that, The one-way housing is annular and one end extends toward its center to form a baffle. The limiting member is plate-shaped and located below the one-way housing and is fixedly connected to the one-way housing.

3. The transmission device for a nail gun according to claim 2, characterized in that, The transmission component has an outwardly extending protrusion on its side wall and a one-way groove on its side. The one-way groove is located between the protrusions. The one-way component is cylindrical and located in the one-way groove. The protrusion and the one-way component are located between the limiting component and the baffle.

4. The transmission device for a nail gun according to claim 3, characterized in that, The one-way groove gradually increases in one direction. When the transmission component rotates relative to the one-way housing in the direction where the one-way groove gradually decreases, the one-way component is freely located in the one-way groove, allowing the transmission component to rotate in that direction. When the transmission component rotates relative to the one-way housing in the direction where the one-way groove gradually increases, the one-way component is squeezed between the transmission component and the one-way housing to achieve engagement and prevent the transmission component from rotating in that direction.

5. The transmission device for a nail gun according to claim 4, characterized in that, The transmission device further includes a first planetary gear mechanism, which is connected to the transmission component and drives the transmission component to rotate. The first planetary gear mechanism includes a first planetary gear housing, and the limiting component is located between the one-way housing and the first planetary gear housing.

6. The transmission device for a nail gun according to claim 5, characterized in that, The lower end of the transmission component body passes through the limiting member and is connected to the first planetary gear mechanism. The upper end of the transmission component body passes through the baffle. The transmission component body is also provided with an output gear, which is connected to the second planetary gear mechanism.

7. The transmission device for a nail gun according to claim 1, characterized in that, A cover plate is fixedly connected to the one-way housing, and the cover plate cooperates with the limiting member to restrict the one-way member and the transmission member within the one-way housing.

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