Striking pin meshing structure of lithium battery striking tool

Abstract

The utility model relates to the technical field of lithium battery striking tools, and discloses a firing pin meshing structure of a lithium battery striking tool, which comprises a gun body, a gun nozzle and a motor, a wheel disc is rotatably mounted on the outer side of the gun body, a gear box is connected outside the wheel disc, the bottom of the gear box is mounted at the driving end of the motor, and the gun nozzle is fixed at the end of the gun body; an air cylinder and an occlusion mechanism are arranged in the gun body, a piston is attached to the inner wall of the air cylinder in a sliding connection mode, a firing pin is fixedly installed on the surface of the piston, the occlusion mechanism comprises multiple pin shafts and tooth blocks, and the pin shafts are circumferentially distributed on the surface of the wheel disc; a part of the clockwise first pin shaft on the wheel disc is expanded outwards and is not on the same arc line with the other five pin shafts, so that when the buffer block becomes thinner and thinner after being impacted, the first outwards expanded pin shaft is clamped on the surface of the last tooth block to be meshed with the last tooth block; and the phenomenon that the firing pin cannot be pulled backwards to be reset due to the pin falling phenomenon caused by the fact that the firing pin is more forward during pin pushing is avoided.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery striking tools, specifically to a striking pin engagement structure for a lithium battery striking tool. Background Technology

[0002] Most existing lithium-ion nail guns are cylinder-type structures. The cylinder contains high-pressure air, and the motor drives the gearbox to convert it into high torque, which then agitates the wheel. The steel pin on the wheel engages with the firing pin and moves it backward in the cylinder to compress the air. When the wheel rotates to the notch, the firing pin is ejected by the high-pressure gas to complete the nailing action. In addition, there are buffer blocks fixed inside the cylinder to reduce the vibration and noise of the piston of the firing pin hitting the front part during nailing.

[0003] The disadvantage is that as the usage time increases, the buffer block will become thinner and thinner due to the impact of the firing pin piston. When the buffer block is thinned to a certain extent, the firing pin will be pushed further forward by the air pressure when it moves towards the position of the steel nail to push the nail. At this time, the steel pin of the wheel will not be able to hook the first tooth block on the firing pin. Furthermore, when the steel pin hits the cross-section of the first tooth block of the firing pin, the firing pin will not be pulled back and cannot be reset.

[0004] In view of this, the present invention solves the above-mentioned technical problems by proposing a striking pin engagement structure for a lithium battery striking tool. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] If the firing pin strikes the buffer block inside the cylinder for a long time, the buffer block will become thinner. Therefore, when the firing pin moves towards the position of the steel nail to push the nail, it will be pushed further forward by the air pressure. The steel pin will then be unable to hook the first tooth block, causing the firing pin to be unable to be pulled back and reset.

[0007] (II) Technical Solution

[0008] To solve the above problems, this utility model provides the following technical solution:

[0009] A firing pin engagement structure for a lithium-ion battery-powered striking tool includes a gun body, a nozzle, and a motor. A wheel is rotatably mounted on the outer side of the gun body, and a gearbox is connected to the outside of the wheel. The bottom of the gearbox is mounted on the drive end of the motor, and the nozzle is fixed to the end of the gun body.

[0010] The gun body is equipped with a cylinder and a engagement mechanism. A piston is slidably connected to the inner wall of the cylinder. A firing pin is fixedly installed on the surface of the piston. The engagement mechanism includes pins and tooth blocks. There are multiple pins that are circumferentially distributed on the surface of the disc. The number of tooth blocks is equal to the number of pins and they are distributed laterally at equal intervals on the surface of the firing pin.

[0011] A buffer block with a cushioning function is fixed inside the cylinder near the wheel.

[0012] As a preferred embodiment of this utility model, one of the pins is not on the same arc as the other pins, and the multiple pins mesh with multiple tooth blocks on the surface of the firing pin.

[0013] As a preferred embodiment of this invention, the height of the first pin on the surface of the firing pin is higher than that of the other pins, and the top is a sloping surface.

[0014] As a preferred technical solution of this utility model, a steel nail is placed inside the gun body near the nozzle, and the firing pin pushes the steel nail out horizontally into the workpiece by compressing the gas inside the cylinder.

[0015] As a preferred technical solution of this utility model, the piston at the end of the firing pin slides through the inner wall of the cylinder in the middle part of the buffer block. When the firing pin slides inside the cylinder, the piston contacts the surface of the buffer block, and the buffer block buffers the force of the firing pin being pushed out.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By extending the first pin on the wheel clockwise outwards, which is not on the same arc as the other five pins, the buffer block becomes thinner and thinner with each impact. The first extended pin engages with the surface of the last tooth block, preventing the impact pin from moving further forward during the push and thus avoiding the pin coming off the pin and preventing it from being pulled back to its original position.

[0018] 2. When the firing pin moves backward in the cylinder by engaging with the pin through the rotation of the wheel, the first tooth on the surface of the firing pin can hook onto the last pin on the clockwise side of the wheel, which is located on the arc. This prevents the first tooth from being unable to hook onto the pin when the firing pin moves backward and resets in the cylinder and is then ejected again. This is because the tooth wears down due to the back-and-forth movement of the firing pin, and the pressure generated inside the cylinder when the firing pin retracts will automatically push it out, causing the steel nail to be fired without warning and causing injury. The high protrusion of the first tooth can prevent this situation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the state of the firing pin pusher of this utility model;

[0020] Figure 2 This is a schematic diagram showing the state in which the firing pin retracts and engages with the pin shaft of this utility model;

[0021] Figure 3 This utility model Figure 2 Structural diagram of the firing pin.

[0022] In the diagram: 1. Gun body; 101. Firing pin; 102. Tooth block; 103. Piston; 2. Nozzle; 3. Disc; 301. Pin; 5. Buffer block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1;

[0025] Please see Figure 1-3 As shown, a lithium-ion electric impact tool has a firing pin engagement structure consisting of a gun body 1, a nozzle 2, and a motor. A wheel 3 is rotatably mounted on the outside of the gun body 1. A gearbox is connected to the outside of the wheel 3. The bottom of the gearbox is mounted on the drive end of the motor. The nozzle 2 is fixed to the end of the gun body 1.

[0026] The gun body 1 is equipped with a cylinder and a engagement mechanism. A piston 103 is slidably connected to the inner wall of the cylinder. A firing pin 101 is fixedly installed on the surface of the piston 103. The engagement mechanism includes a pin 301 and a toothed block 102. There are multiple pins 301 and they are circumferentially distributed on the surface of the wheel 3. The number of toothed blocks 102 is equal to the number of pins 301 and they are distributed laterally at equal intervals on the surface of the firing pin 101. A buffer block 5 with a buffering function is fixed inside the cylinder near the wheel 3.

[0027] One of the pins 301 is outwardly extended and is not on the same arc as the other pins 301; multiple pins 301 mesh with multiple tooth blocks on the surface of the firing pin 101.

[0028] The first pin 301, counting clockwise on the wheel 3, extends outward and is not on the same arc as the other five pins 301. When the impact pin 101 is pushed out by the pressure inside the cylinder, the toothed block 102 on the impact pin 101 engages with the multiple pins 301 one by one, causing the wheel 3 to rotate. When the wheel 3 rotates to the first outwardly extended pin 301, it will be stuck on the surface of the last toothed block 102 from left to right on the surface of the impact pin 101. This allows the buffer block 5 to become thinner and thinner with each impact. The first outwardly extended pin 301 is stuck on the surface of the last toothed block 102 and engages with it, preventing the impact pin 101 from going further forward when pushing the pin and thus becoming dislodged, preventing it from being pulled back to reset.

[0029] Example 2 differs from Example 1 in that...

[0030] The height of the first pin 301 on the surface of the firing pin 101 is higher than that of the other pins 301, and the top is sloping. A steel nail is placed inside the gun body 1 near the nozzle 2. The firing pin 101 pushes the steel nail out horizontally into the workpiece by compressing the gas inside the cylinder. The piston 103 at the end of the firing pin 101 slides through the middle part of the cylinder wall of the buffer block 5. When the firing pin 101 slides inside the cylinder, the piston 103 contacts the surface of the buffer block 5, and the buffer block 5 buffers the force of the firing pin 101 being pushed out.

[0031] The first toothed block 102 on the surface of the firing pin 101, counting from left to right, protrudes higher than the other toothed blocks 102, and its top is set as a slope. When the firing pin 101 moves backward in the cylinder by rotating the wheel 3 and engaging with the pin 301, the first toothed block 102 on the surface of the firing pin 101 can hook with the last pin 301 on the arc line, counting clockwise on the surface of the wheel 3. This prevents the toothed block 102 from being worn due to the back-and-forth movement of the firing pin 101 when it moves backward and resets in the cylinder and is then ejected again. This would prevent the first toothed block 102 from hooking the pin 301 when the firing pin 101 is pushed forward. Since the first toothed block 102 cannot hook the pin 301, and the pressure generated inside the cylinder when the firing pin 101 is retracted will automatically push it out, causing the steel nail to be fired without warning and causing injury. The protruding height of the first toothed block 102 can prevent this situation.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A striking pin engagement structure for a lithium-ion battery-powered striking tool, comprising: Gun body (1), muzzle (2) and motor, a wheel (3) is rotatably mounted on the outside of the gun body (1), a gearbox is connected to the outside of the wheel (3), the bottom of the gearbox is mounted on the drive end of the motor, and the muzzle (2) is fixed to the end of the gun body (1); The gun body (1) is characterized by having a cylinder and a engagement mechanism inside. The inner wall of the cylinder is fitted with a piston (103) which is slidably connected. A firing pin (101) is fixedly installed on the surface of the piston (103). The engagement mechanism includes a pin (301) and a tooth block (102). There are multiple pins (301) and they are circumferentially distributed on the surface of the wheel (3). The number of tooth blocks (102) is equal to the number of pins (301) and they are distributed laterally at equal intervals on the surface of the firing pin (101). A buffer block (5) with a buffering function is fixed inside the cylinder near the wheel (3).

2. The striking pin engagement structure of a lithium battery striking tool according to claim 1, characterized in that: One of the pins (301) is outwardly extended and not on the same arc as the other pins (301), and the multiple pins (301) mesh with multiple tooth blocks on the surface of the firing pin (101).

3. The striking pin engagement structure of a lithium battery striking tool according to claim 2, characterized in that: The height of the first pin (301) on the surface of the firing pin (101) is higher than that of the other pins (301), and the top is a sloping surface shape.

4. The striking pin engagement structure of a lithium battery striking tool according to claim 3, characterized in that: A steel nail is placed inside the gun body (1) near the nozzle (2). The firing pin (101) pushes the steel nail out horizontally into the workpiece by compressing the gas inside the cylinder.

5. The striking pin engagement structure of a lithium battery striking tool according to claim 4, characterized in that: The piston (103) at the end of the striker (101) slides through the inner wall of the cylinder in the middle part of the buffer block (5). When the striker (101) slides inside the cylinder, the piston (103) contacts the surface of the buffer block (5) and the buffer block (5) buffers the force of the striker (101) being pushed out.

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