Firing pin drive mechanism and nail gun

Abstract

The present invention provides a firing pin drive mechanism and a nail gun, which can effectively improve the nail shooting force without increasing energy consumption. The firing pin drive mechanism includes a regulatory frame and a guide rod, a piston, a spring, a rolling element, a pushing member, etc. installed in the regulatory frame. The piston is movably sleeved on the guide rod. The piston includes a piston body and a piston protective member. Since the piston body is made of a lightweight material, the weight is reduced, so the nail shooting force can be improved without increasing energy consumption. At the same time, due to the adoption of a low-resistance design, including the piston not directly contacting the regulatory frame, but abutting the regulatory frame through a rolling element, the friction during movement is reduced. A plurality of exhaust holes are provided on the piston to reduce the wind resistance during movement, so the nail shooting force can be further improved. Since the piston protective member is made of a wear-resistant material, the pushing member abuts against the piston protective member and pushes the piston through the piston protective member, so that the piston has a longer service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of fastening tools, in particular to a firing pin driving mechanism and a nail gun. Background Art

[0002] A nail gun is a fastening tool commonly used in construction. Currently, a widely used type of nail gun is an electric nail gun powered by a lithium battery. This type of nail gun uses a drive motor and a corresponding transmission structure to push a piston, which in turn compresses a spring to store energy. During nailing, the piston instantly performs work under the action of the spring force. The weight of the piston directly affects the force and rebound force of the nail. Heavier pistons result in lower force and higher rebound force. In existing technologies, pistons are often made of iron, making them heavy and significantly impacting the force. In order to overcome the above problems and achieve the ideal nail-driving force, two methods are currently mainly used. One is to increase the elastic force of the spring to increase the nail-driving force, but this method will increase energy consumption, that is, the number of nail-driving times in a battery cycle will be reduced. At the same time, the increase in spring force also causes an increase in rebound force. Therefore, when the user holds the gun to shoot nails, he needs to press the nail gun hard to meet the operating requirements, which increases labor intensity and leads to poor user experience. The second is to add a corresponding anti-shock device in the nail gun to reduce the rebound force of the piston and thus increase the nail-driving force. However, the addition of the anti-shock device makes the structure of the nail gun more complicated, and the requirements for the precision of each component are higher, thereby increasing the cost and manufacturing difficulty of the product, and also increasing the difficulty of self-repair by users.

[0003] Therefore, in order to improve the nailing force without increasing energy consumption and make it easier to repair and maintain, a nail gun with a new optimized structure is needed. Summary of the Invention

[0004] In order to solve the above problems, a firing pin drive mechanism and a nail gun with higher nail shooting force and easier maintenance are provided. The present invention adopts the following technical solutions:

[0005] The present invention provides a striker drive mechanism, characterized in that it includes a regulating frame; a piston accommodated in the regulating frame; at least one force supply spring, one end of which is fixed on the regulating frame and the other end is in contact with the piston, for providing power for the movement of the piston; and a pushing member, having a pushing end facing the piston, for pushing the piston to move toward the force supply spring, thereby compressing the force supply spring to store energy, wherein the striker is installed on the piston, and the piston includes a piston body, which is made of a light material; and a piston protector, which matches the pushing end, is installed on the piston body and faces the pushing member, and the piston protector is made of a wear-resistant material.

[0006] The striker drive mechanism provided by the present invention may also have such technical features, wherein the piston body is an aluminum component, having a push portion extending toward the pushing component, and the piston protector is an iron component, covering the push portion.

[0007] The striker drive mechanism provided by the present invention may also have such technical features, wherein the piston body is an aluminum component, having a push portion extending toward the pushing component, and the piston protector is an iron component, covering the push portion.

[0008] The striker drive mechanism provided by the present invention may also have such a technical feature, wherein the piston protector is an iron component, and the piston body is made of plastic, which is cast on the piston protector by an iron-plastic composite method to form an integral part.

[0009] The striker drive mechanism provided by the present invention may also have such technical features, wherein the piston body is an aluminum component, having a push portion extending toward the pushing component, and the piston protector is a titanium coating coated on the push portion.

[0010] The striker drive mechanism provided by the present invention may also have such technical features, and also includes a guide rod, which is installed in the regulating frame and extends along the length direction of the regulating frame; and at least one pair of rolling elements, which are respectively rotatably embedded on both sides of the piston and respectively abut against the regulating frame, wherein the force supply spring is sleeved on the guide rod, and the middle part of the piston has a sleeve through hole, and the piston is movably sleeved on the guide rod through the sleeve through hole.

[0011] The striker drive mechanism provided by the present invention may also have such a technical feature, wherein a plurality of exhaust holes are provided on the piston, which are distributed around the sleeve through hole, and the extension direction of the exhaust through holes is consistent with the length direction of the guide rod.

[0012] The striker drive mechanism provided by the present invention may also have such technical features, wherein the regulating frame has two regulating plates, both of which extend along the length direction of the regulating frame, and two rolling element grooves are provided on both sides of the piston body, and a pair of rolling elements can be respectively rotatably embedded in the two rolling element grooves and respectively abut against the regulating plates on the corresponding sides.

[0013] The striker drive mechanism provided by the present invention may also have such a technical feature, wherein the guide rod is a circular rod, and the sleeve through hole is a circular through hole matching the guide rod.

[0014] The striker drive mechanism provided by the present invention may also have such a technical feature, wherein the guide rod is a square rod, and the sleeve through hole is a square through hole matching the guide rod.

[0015] The firing pin driving mechanism provided by the present invention may also have such a technical feature, wherein the number of piston protection members is two, and the two piston protection members are installed on the piston to form a first pushing end and a second pushing end, the first pushing end extends from the piston along the nail shooting direction, and the second pushing end extends from the piston perpendicular to the first pushing end and toward the pushing member, the pushing member includes a wheel body and a first pushing protrusion and a second pushing protrusion arranged on the wheel body and facing the piston, the first pushing protrusion and the second pushing protrusion are pushing ends, the first pushing protrusion corresponds to the setting of the first pushing end, and the height of the first pushing protrusion is higher than the second pushing protrusion, and the second pushing protrusion corresponds to the setting of the second pushing end, when the wheel body rotates, the second pushing protrusion abuts against the second pushing end and pushes the second pushing end, so that the piston moves toward the supply spring, thereby causing the supply spring to perform the first stage of energy storage, after the first stage of energy storage is completed, the first pushing protrusion abuts against the first pushing end and pushes the first pushing end, so that the piston moves toward the supply spring, thereby causing the supply spring to perform the second stage of energy storage.

[0016] The firing pin drive mechanism provided by the present invention may also have such technical features, and also includes a drive motor for driving the pushing component to rotate, driving the pushing protrusion to move, and then pushing the piston to move toward the force supply spring; and a one-way bearing installed at the output end of the drive motor, wherein the wheel body is installed at the output end of the drive motor.

[0017] The present invention provides a nail gun, characterized in that it includes a firing pin for striking the nail; and a firing pin driving mechanism for driving the firing pin to move, wherein the firing pin driving mechanism is the firing pin driving mechanism mentioned above.

[0018] The nail gun provided by the present invention may also have such technical features, and further includes a shell, which includes a main body casing and a firing pin baffle, wherein the firing pin has at least a mounting portion for detachably mounting the firing pin to the piston, and the main body casing has a replacement opening, the position of the replacement opening corresponds to the mounting portion, and the firing pin baffle is detachably mounted on the replacement opening.

[0019] Functions and effects of the invention

[0020] According to the firing pin drive mechanism and nail gun of the present invention, the firing pin drive mechanism includes a regulatory frame, a piston accommodated in the regulatory frame, at least one force supply spring and a pushing member. One end of the force supply spring is fixed on the regulatory frame, and the other end is in contact with the piston. Therefore, the force supply spring can provide power for the movement of the piston, drive the piston to move and drive the firing pin installed on the piston to strike the nail. The pushing member can push the piston to move in the direction of the force supply spring, thereby compressing and storing energy for the force supply spring; the piston includes a piston body and a piston protector installed on the piston body and facing the pushing member. Since the piston body is made of light material, the overall weight of the piston is greatly reduced compared with the prior art, so the nail shooting force can be effectively improved without increasing energy consumption. Since the pushing end of the pushing member does not directly contact the piston, but is in contact with the piston protector and pushes the piston through the piston protector, and the piston protector is made of wear-resistant material, the wear generated during the movement of the piston is reduced, so that the piston has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a structural diagram of a nail gun according to a first embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the structure of the nail gun according to the first embodiment of the present invention;

[0023] Figure 3 1 is a structural diagram of a striker drive mechanism and a striker according to a first embodiment of the present invention;

[0024] Figure 4 1 is a structural diagram of the firing pin drive mechanism and firing pins at different angles according to the first embodiment of the present invention;

[0025] Figure 5 This is an exploded structural diagram of the striker drive mechanism and striker of the first embodiment of the present invention;

[0026] Figure 6 1 is a structural diagram of a limiting base according to a first embodiment of the present invention;

[0027] Figure 7 1 is a structural diagram of a piston according to a first embodiment of the present invention;

[0028] Figure 8 1 is a structural diagram of the piston at different angles according to the first embodiment of the present invention;

[0029] Figure 9 is an orthographic projection diagram of the piston according to the first embodiment of the present invention;

[0030] Figure 10 is a cross-sectional view of a piston according to a first embodiment of the present invention;

[0031] Figure 11is a structural diagram of a pushing member according to a first embodiment of the present invention;

[0032] Figure 12 is an orthographic projection diagram of the pushing member of the first embodiment of the present invention;

[0033] Figure 13 is an orthographic projection diagram of the piston according to the first embodiment of the present invention;

[0034] Figure 14 This is a structural diagram of the first stage of energy storage performed by the pushing member and the piston in cooperation with each other in the first embodiment of the present invention;

[0035] Figure 15 This is a structural diagram of the push member and the piston cooperating to perform the second stage of energy storage in the first embodiment of the present invention;

[0036] Figure 16 This is a structural diagram of the piston reaching its maximum stroke in Example 1 of the present invention;

[0037] Figure 17 1 is a diagram showing the internal structure of a nail gun according to a first embodiment of the present invention;

[0038] Figure 18 1 is a structural diagram of a striker according to a first embodiment of the present invention;

[0039] Figure 19 is a structural diagram of a striker fixing member according to a first embodiment of the present invention;

[0040] Figure 20 This is an exploded view of the structure of the gun nozzle of the first embodiment of the present invention;

[0041] Figure 21 This is a structural exploded view of the nail gun according to the first embodiment of the present invention after the firing pin baffle and firing pin are disassembled;

[0042] Figure 22 1 is a structural diagram of the striker baffle at different angles according to the first embodiment of the present invention;

[0043] Figure 23 This is a structural diagram of the engagement between the striker baffle and the main housing according to the first embodiment of the present invention;

[0044] Figure 24 is a structural diagram of a piston according to a second embodiment of the present invention;

[0045] Figure 25 1 is a structural diagram of the piston at different angles according to the second embodiment of the present invention.

[0046] Reference numerals:

[0047] Nail gun 10; housing 20; main housing 21; left outer housing 211; left housing notch 2111; left supporting protrusion 2112; slot 2113; right outer housing 212; right housing notch 2121; right supporting protrusion 2122; replacement opening 213; buckle positioning notch 2131; housing fastener 214; firing pin baffle 22; baffle inner side 221; ridge 2211; baffle outer side 222; anti-slip protrusion 2211; indicator protrusion 2212; buckle 223; first extension 2231; second extension 2232; mounting through hole 224; support protrusion 225; striker drive mechanism 30; regulation frame 31; limiting base 311; guide rod mounting hole 3111; buffer member embedding groove 3112; baffle mounting hole 3113; limiting plate 312; limiting through hole 3121 regulating plate 313; lightening hole 3131; frame fastener 314; guide rod 32; spring assembly 33; first force supply spring 331; second force supply spring 332; piston 34; piston body 341; body portion 3411; spring abutment groove 34 111; rolling element embedding groove 34112; embedding groove opening 34112a; exhaust through hole 34113; sleeve portion 3412; sleeve through hole 34121; striker mounting portion 3413; striker mounting hole 34131; first push portion 3414; second push portion 3415; first piston protection member 342; second piston protection member 343; protection member connecting portion 3431; first push end 345; second push end 346; rolling element 35; buffer member 36; pushing member 37; wheel body 371; first pushing protrusion 3711; second pushing protrusion 3712; pivot hole 3713; driving motor 38; rotating motor 381; deceleration and torque increasing unit 382; output shaft 3821; one-way bearing 39; firing pin 40; mounting portion 41; mounting hole 411; guiding striking portion 42; guide groove 421; firing pin fixing member 44; insertion portion 441; crimping portion 442; crimping top surface 4421; gun nozzle 50; firing pin accommodating member 501; gun nozzle cover plate 502; firing pin accommodating groove 5011; accommodating groove opening 5011a; nail feeding mechanism 60. DETAILED DESCRIPTION

[0048] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the firing pin drive mechanism and the nail gun of the present invention are described in detail below with reference to the embodiments and drawings.

[0049] <Example 1>

[0050] This embodiment provides a firing pin drive mechanism and a nail gun that have higher nail-shooting force, lighter structure weight, and are easier to inspect and maintain.

[0051] Figure 1 2 is a structural diagram of a nail gun according to an embodiment of the present invention.

[0052] Figure 2 It is a structural exploded view of a nail gun according to an embodiment of the present invention.

[0053] like Figure 1 and Figure 2 As shown, the nail gun 10 of this embodiment includes a housing 20 and a firing pin drive mechanism 30, a firing pin 40, a gun nozzle 50, and a nail feeding mechanism 60 installed inside the housing 20. The nail gun 10 also includes internal components such as a battery and a control circuit installed in the housing 20, which are not shown in the figure.

[0054] The housing 20 is used to accommodate internal components such as the aforementioned striker drive mechanism 30 , the striker 40 , and the nail feeding mechanism 50 .

[0055] The striker driving mechanism 30 is used to drive the striker 40 to move along a predetermined reciprocating direction.

[0056] Figure 3 2 is a structural diagram of a striker drive mechanism and a striker according to an embodiment of the present invention.

[0057] Figure 4 1 is a structural diagram of a firing pin drive mechanism and firing pins at different angles according to an embodiment of the present invention.

[0058] Figure 5 1 is an exploded view of the structure of the firing pin drive mechanism and the firing pin according to an embodiment of the present invention.

[0059] like Figure 3-5 As shown, the striker drive mechanism 30 of this embodiment includes a regulating frame 31 , a guide rod 32 , a spring assembly 33 , a piston 34 , a pair of rolling elements 35 , a buffer 36 , a pushing member 37 , a drive motor 38 and a one-way bearing 39 .

[0060] The regulating frame 31 is used to regulate and limit the piston 34 so that the piston 34 can only move in a predetermined reciprocating direction. Figure 3 As shown, the direction indicated by arrow D1 is the nail-driving direction, and the direction indicated by arrow D2 is the energy-storing direction. The reciprocating motion direction includes the aforementioned nail-driving and energy-storing directions. The longitudinal direction of the regulating frame 31 aligns with the reciprocating motion direction. The regulating frame 31 includes a limiting base 311, a limiting plate 312, and two regulating plates 313.

[0061] The limiting base 311 is used to limit the movement of the piston 34 during nail shooting.

[0062] Figure 6 2 is a structural diagram of a limiting base according to an embodiment of the present invention.

[0063] like Figure 6As shown, the limiting base 311 of this embodiment has a certain thickness, so it can withstand the impact of the piston 34 during nail injection without deformation. The central portion of the limiting base 311 has a guide rod mounting hole 3111 and a buffer member recess 3112 connected to the guide rod mounting hole 3111. The guide rod mounting hole 3111 is a circular through-hole that matches the guide rod 32 and is used to securely mount the guide rod 32. The buffer member recess 3112 is a circular groove that matches the buffer member 36 and is used to securely mount the buffer member 36. The limiting base 311 also has multiple other mounting holes for securing the firing pin baffle 22 and the regulating plate 313.

[0064] The stop plate 312 is used to limit the position of the piston 34 and the spring assembly 33. A circular stop hole 3121 is defined in the center of the stop plate 312, which matches the guide rod 32 and is used to receive the guide rod 32. The diameter of the stop hole 3121 is larger than that of the guide rod 32, allowing the guide rod 32 to be movably mounted on the stop plate 412.

[0065] The regulating plate 313 is used to regulate the movement direction of the piston 34. The two regulating plates 313 are arranged in parallel and extend along the length of the regulating frame 31. Each regulating plate 313 has three lightening holes 3131 to reduce the weight of the structure.

[0066] The limiting base 311 and limiting plate 312 are both positioned perpendicular to the regulating plate 313. The two ends of the limiting base 311 and limiting plate 312 are connected to the ends of the two regulating plates 313, respectively. These ends are secured together by a plurality of frame fasteners 314, forming an open square frame. In this embodiment, the frame fasteners 314 are screws that match the corresponding mounting holes.

[0067] The guide rod 32 is used to guide the piston 34 in a predetermined reciprocating direction. The guide rod 32 is a round rod with uniform thickness along its length. One end of the guide rod 32 is fixedly mounted in the middle of the limit base 311 through a guide rod mounting hole 3111, and the other end is movably mounted in the middle of the limit plate 312 through a limit through-hole 3121.

[0068] The spring assembly 33 is used to provide the power for impact nailing. In this embodiment, the spring assembly 33 includes a first force spring 331 and a second force spring 332, both of which are mounted on the guide rod 32. One end of each spring abuts the stop plate 312, and the other end abuts the piston 34. The first force spring 331 has a larger diameter than the second force spring 332, and the first and second force springs 331, 332 have different rotational directions. When mounted on the guide rod 32, the first force spring 331 is located on the outer layer, while the second force spring 332 is located on the inner layer.

[0069] The piston 34 is used to drive a striker 40 mounted on the piston 34 to move.

[0070] Figure 7 1 is a structural diagram of a piston according to an embodiment of the present invention.

[0071] Figure 8 1 is a structural diagram of a piston at different angles according to an embodiment of the present invention.

[0072] like Figure 7 and Figure 8 As shown, the piston 34 of this embodiment includes a piston body 341 , a first piston protection member 342 and a second piston protection member 343 .

[0073] The piston body 341 is made of aluminum, and includes a main body portion 3411 , a sleeve portion 3412 , a striker mounting portion 3413 , a first push portion 3414 , and a second push portion 3415 .

[0074] The main body 3411 is used to compress the first and second force supply springs 331 and 332, and to drive the striker 40 to move. A spring abutment groove 34111 is formed on one side of the main body 3411 for abutting the ends of the first and second force supply springs 331 and 332. The spring engagement groove 34111 opens toward the spring assembly 33 and its shape matches the end of the first force supply spring 331. Therefore, one end of the first and second force supply springs 331 and 332 can abut against the bottom of the spring abutment groove 34111 and be limited by the walls of the spring abutment groove 34111, thereby preventing them from disengaging from the piston 34 during compression or release.

[0075] The main body 3411 has two sides facing the two regulating plates 313, respectively, with rolling element embedding grooves 34112 for mounting the rolling element 35. The rolling element embedding grooves 34112 are round bottom grooves matching the rolling element 35 and have a circular embedding groove opening 34112a.

[0076] Figure 9 It is an orthographic projection diagram of the piston according to an embodiment of the present invention.

[0077] like Figure 9 As shown, the main body 3411 is also provided with eight exhaust holes 34113 to reduce wind resistance during the movement of the piston 34. The exhaust holes 34113 are circular and extend in the same direction as the sleeve hole 34121, which is in turn aligned with the intended direction of reciprocating motion. Furthermore, the eight exhaust holes 34113 are arranged symmetrically around the sleeve hole 34121, ensuring uniform force on the piston 34 during movement.

[0078] The sleeve portion 3412 is located in the middle of the piston body 3411 and has a sleeve hole 34121 for sleeve-fitting the piston 34 onto the guide rod 32. The sleeve hole 34121 is a circular through hole with a diameter larger than that of the guide rod 32. The inner wall of the sleeve hole 34121 is smooth, allowing the piston 34 to slide along the length of the guide rod 32 after being sleeved onto the guide rod 32.

[0079] The striker mounting portion 3413 is disposed on the side of the piston body 341 facing the replacement opening 231 and has a striker mounting hole 34131 matching the striker fixing piece for fixing and mounting the striker 40 .

[0080] The first and second abutting portions 3414, 3415 cooperate with the pushing member 37 to push the piston 34 in the direction of energy storage. Both the first and second abutting portions 3414, 3415 are located on the side of the piston body 341 near the pushing member 37, and are located on either side of the piston body 341, along with the firing pin mounting portion 3413. The first abutting portion 3414 extends from the piston body 341 toward the direction of nail injection, while the second abutting portion 3415 extends from the piston body 341 toward the pushing member 37, and the second abutting portion 3415 is substantially perpendicular to the first abutting portion 3414.

[0081] Both the first piston protector 342 and the second piston protector 343 are made of iron, making them more wear-resistant and protecting the piston body 341. The shape of the first piston protector 342 matches the first push portion 3414, and the first piston protector 342 covers the first push portion 3414 to form a first push end 345. The shape of the second piston protector 343 matches the second push portion 3415, and the second piston protector 343 covers the second push portion 3415 to form a second push end 346.

[0082] The first piston protection member 342 and the second piston protection member 343 are both fixedly mounted on the piston body 341 by corresponding fasteners (not shown in the figures). In this embodiment, the fasteners are screws.

[0083] The rolling element 35 is used to reduce friction during the movement of the piston 34. In this embodiment, the rolling element 35 is a spherical steel ball with a diameter smaller than the groove opening 34112a. Therefore, the rolling element 35 can be installed in the rolling element groove 34112 through the groove opening 34112a and rollably engage with the rolling element groove 34112. At the same time, the diameter of the rolling element 35 is greater than the depth of the rolling element groove 34112. Therefore, when the rolling element 35 is engaged in the rolling element groove 34112, the rolling element 35 protrudes outward from the rolling element groove 34112.

[0084] Figure 10is a cross-sectional view of a piston according to an embodiment of the present invention.

[0085] Figure 9 L2 is the overall width of the piston 34 after the rolling element 35 is installed. Figure 10 Where L1 is the distance between the two regulation plates 313. Figure 9 and Figure 10 As shown, when the piston 34 is installed in the regulating frame 31, the two rolling elements 35 are respectively rotatably engaged in the two rolling element embedding grooves 34112 and respectively abut against the inner side of the corresponding regulating plate 313 facing the piston 34. Since the rolling elements 35 protrude outward from the rolling element embedding grooves 34112, there is a certain distance between the regulating plate 313 and the piston 34, that is, Figure 9 In the example, L1>L2, the two regulating plates 313 do not directly contact the piston 34, thereby reducing the friction experienced by the piston 34 during movement. Furthermore, the three lightening holes 3131 on the regulating plate 313 are located outside the rolling path of the rolling element 35. Therefore, the provision of the lightening holes 3131 does not affect the regulating function of the regulating plate 313.

[0086] The buffer 36 is used to cushion the impact of the piston 34 during nailing, thereby protecting the stop base 311 and the piston 34. The buffer 36 also reduces the rebound force of the piston 34. In this embodiment, the buffer 36 is a soft plastic cushion installed in the buffer groove 3112 of the stop base 311. The thickness of the buffer 36 is greater than the depth of the buffer groove 3112. Therefore, after installation, the buffer 36 protrudes outward from the buffer groove 3112, preventing the piston 34 from directly impacting the stop base 311 during nailing. The buffer 36 also has a through hole in the middle that mates with the guide rod 32, so the installation of the buffer 36 does not affect the installation of the guide rod 32.

[0087] The pushing member 37 is used to push the piston 34 to move toward the spring assembly 33 , that is, to move toward the energy storage direction, thereby compressing the first force supply spring 331 and the second force supply spring 332 to store energy.

[0088] Figure 11 2 is a structural diagram of a pushing component according to an embodiment of the present invention.

[0089] like Figure 3-5 and Figure 11 As shown, the pushing member 37 of this embodiment is a cam having a wheel body 371 , a first pushing protrusion 3711 and a second pushing protrusion 3712 , that is, the cam has two pushing ends for pushing the piston 34 .

[0090] The wheel 371 can rotate along its central axis, driving the first and second push protrusions 3711 and 3712 to move in an arc, thereby pushing the piston 34. A pivot hole 3713 is located in the center of the wheel 371. The wheel 371 is mounted to the output of the drive motor 38 through this pivot hole and rotates around the output. The wheel 371 also has multiple lightening grooves to reduce weight and energy consumption.

[0091] The wheel body 371 has a first push protrusion 3711 and a second push protrusion 3712 on one side thereof facing the piston 34. The first push protrusion 3711 and the second push protrusion 3712 are both cylindrical, extending in the same direction as the pivot hole 3713, and the first push protrusion 3711 is higher than the second push protrusion 3712.

[0092] The shape and height of the first pushing protrusion 3711 correspond to the configuration of the first pushing end 345 , and the shape and height of the second pushing protrusion 3712 correspond to the configuration of the second pushing end 346 .

[0093] Figure 12 It is an orthographic projection diagram of the pushing member according to the embodiment of the present invention.

[0094] Figure 13 It is an orthographic projection diagram of the piston according to an embodiment of the present invention.

[0095] Figure 12 L3 is the distance between the first pushing protrusion 3711 and the second pushing protrusion 3712, Figure 13 Where L4 is the distance between the end surface of the first abutting end 345 and the end surface of the second abutting end 346, L3>L4.

[0096] Based on the above structure, the piston 34 can only move in the predetermined nail-shooting direction when shooting nails, and can cooperate with the pushing member 37 to move only in the predetermined energy storage direction when storing energy of the spring assembly 33.

[0097] Figure 14 This is a structural diagram of the first stage of energy storage performed by the pushing member and the piston in an embodiment of the present invention.

[0098] like Figure 14As shown, the pushing member 37 rotates under the drive of the drive motor 38. As the pushing member 37 rotates, the second pushing protrusion 3712 moves to the second abutting end 346 and abuts against it. At this point, the pushing member 37 continues to rotate, and the second pushing protrusion 3712 performs an arc-shaped motion generally in the energy storage direction. This arc-shaped pushing force is applied to the piston 34 via the second abutting end 346. Under the action of this pushing force, the piston 34 can move along the guide rod 32 in the energy storage direction and also perform a circular motion around the guide rod 32. Because the piston 34 abuts against the corresponding regulating plate 313 via a pair of rolling elements 35, the movement direction of the piston 34 is restricted, preventing it from performing a circular motion. Specifically, the piston 34 does not deflect along the width of the regulating frame 31, but can only move along the guide rod 32 in the energy storage direction, thereby compressing the first and second supply springs 331 and 332 to store energy.

[0099] Figure 15 FIG16 is a structural diagram of the piston of the embodiment of the present invention when it reaches the maximum stroke.

[0100] like Figure 15 and Figure 16 As shown, the first stage of energy storage is completed when the second pushing protrusion 3712 rotates to its maximum stroke in the energy storage direction. At this time, the pushing member 37 continues to rotate, and the second pushing protrusion 3712 rotates accordingly and disengages from the second abutting end 346. At the same time, the first pushing protrusion 3711 rotates to the first abutting end 345 and abuts against the first abutting end 345. Subsequently, the first pushing protrusion 3711 pushes the piston 34 further in the energy storage direction in the same manner until the first pushing protrusion 3711 rotates to its maximum stroke in the energy storage direction, completing the second stage of energy storage.

[0101] After the second stage of energy storage is completed, nailing can begin. During nailing, the drive motor 38 drives the pushing member 37 to continue rotating, and the first pushing protrusion 3711 rotates accordingly and disengages from the first abutting end 345. At this time, the first pushing protrusion 3711 and the second pushing protrusion 3712 are both outside the movement path of the piston 34. Therefore, the piston 34 moves in the nailing direction under the elastic force of the spring assembly 33 until the piston 34 strikes the buffer 36, completing the nailing process.

[0102] The driving motor 38 is used to drive the pushing member 37 to rotate, thereby pushing the piston 34 to move through the pushing member 37 .

[0103] Figure 17 2 is a diagram showing the internal structure of a nail gun according to an embodiment of the present invention.

[0104] like Figure 5 and Figure 17 As shown, the drive motor 38 of this embodiment includes a rotary motor 381 and a deceleration and torque-increasing unit 382. The deceleration and torque-increasing unit 382 is mounted at the output end of the rotary motor 381 and is used to reduce the rotational speed of the output end of the rotary motor 381, thereby obtaining a higher output torque, that is, a greater driving force. The end of the deceleration and torque-increasing unit 382 is provided with an output shaft 3821, which is the output end of the drive motor 38. The wheel body 371 of the pushing member 37 is mounted on the output shaft 3821 through the pivot hole 3711, so that the pushing member 37 can rotate synchronously with the output shaft 3821.

[0105] The one-way bearing 39 is used to limit the rotational direction of the output end of the drive motor 38, limiting it to unidirectional rotation. The one-way bearing 39 is mounted on the output shaft 3821 of the torque reduction and amplification unit 382, ​​forming a hole-shaft fit with the output shaft 3821, thereby restricting the output shaft 3821 to unidirectional rotation. Furthermore, when the push member 37 is subjected to a force that causes it to rotate in the opposite direction, the one-way bearing 39 absorbs this force, preventing it from being transmitted to the output shaft 3821, thereby protecting the drive motor 38. Therefore, during the first or second energy storage stages described above, the push member 37 will not rotate in the opposite direction under the force of the piston 34, which could result in erroneous nail firing.

[0106] The specific structures of the rotary motor 381 , the deceleration and torque-increasing unit 382 and the one-way bearing 39 may adopt the structures in the prior art.

[0107] The firing pin 40 is used to strike the nail, thereby ejecting the nail.

[0108] Figure 18 2 is a structural diagram of a firing pin at different angles according to an embodiment of the present invention.

[0109] like Figure 18 As shown, the striker 40 includes a mounting portion 41 and a striker guide portion 42 .

[0110] The mounting portion 41 is used to mount the striker 40 to the piston 34. The mounting portion 41 has a mounting hole 411. During installation, the mounting hole 411 aligns with the striker mounting hole 34131 on the piston 34. The striker securing member 44 passes through the mounting hole 411 and the striker mounting hole 34131 to secure the striker 40 to the piston 34.

[0111] The guiding striking portion 42 is used to strike the nail, and extends from the mounting portion 41, is in an elongated strip shape, and is narrower than the mounting portion 41. One side of the guiding striking portion 42 has a guide groove 421 for regulating the movement direction of the striker 40 during the striking process.

[0112] Figure 192 is a structural diagram of a striker fixing member according to an embodiment of the present invention.

[0113] like Figure 19 As shown, the striker fixing member 44 of this embodiment includes an inserting portion 441 and a crimping portion 442 .

[0114] The inserting portion 441 is used to be inserted into the striker mounting hole 34131 on the piston 34, so as to mount the striker 40 to the piston 34. The inserting portion 441 is a cylindrical body that matches the striker mounting hole 34131.

[0115] The crimping portion 442 is used to cooperate with the striker baffle 22 to limit the striker 40. The crimping portion 442 is connected to the insertion portion 441. The crimping portion 442 is also roughly cylindrical and its diameter is larger than the diameter of the insertion portion 441. The crimping portion 442 has a crimping top surface 4421, and the crimping top surface 4421 has a predetermined arc, so that the crimping top surface 4421 protrudes outward. When the striker 40 is installed on the piston 31 and the striker baffle 22 is installed on the main housing 21, the crimping top surface 4421 of the crimping portion 442 abuts against the inner surface of the striker baffle 22 facing the striker 40, thereby preventing the striker fixing part 44 from falling off during the reciprocating motion. At the same time, since the crimping top surface 4421 is arc-shaped, it can reduce the friction during the reciprocating motion.

[0116] The gun nozzle 50 is used to accommodate the firing pin 40 and limit the movement of the firing pin 40 when the firing pin 40 strikes the nail.

[0117] Figure 20 1 is an exploded view of the structure of the gun nozzle according to an embodiment of the present invention.

[0118] like Figure 2 and Figure 20 As shown, the muzzle 50 includes a firing pin receiving member 501 and a muzzle cover plate 502 .

[0119] The firing pin receiving member 501 has a groove. When the firing pin receiving member 501 and the muzzle cover 502 are assembled together, the groove and the surface of the muzzle cover 502 facing the groove form a firing pin receiving groove 5011 for receiving the firing pin 40. The firing pin receiving groove 5011 has a receiving groove opening 5011a and a groove-shaped structure that matches the guide groove 421. Therefore, the guiding striking portion 42 of the firing pin 40 can be inserted into the firing pin receiving groove 5011 through the receiving groove opening 5011a and slidably engage with the firing pin receiving groove 5011. Similarly, the firing pin 40 can be removed from the receiving groove opening 5011a.

[0120] The nail gun 10 of this embodiment can also conveniently and quickly replace the firing pin 40 through the firing pin baffle 22 and the receiving slot opening 5011 a.

[0121] Figure 21This is a structural exploded view of the nail gun according to an embodiment of the present invention after the firing pin baffle and the firing pin are disassembled.

[0122] like Figure 2 and Figure 21 As shown, the housing 20 includes a main body casing 21 and a striker baffle 22 .

[0123] The main housing 21 is used to accommodate the striker drive mechanism 30, the striker 40 and other internal components, and protect the above-mentioned internal components. Figure 2 As shown, the main housing 21 includes a left outer housing 211, a right outer housing 212, and a plurality of housing fasteners 214. In addition, in this embodiment, the directions "left", "right", "up", and "down" are based on the direction the operator faces when holding the gun to shoot nails.

[0124] The left outer housing 211 and the right outer housing 212 can be assembled together to form an integrated main housing 21 and can be fastened by a plurality of housing fasteners 214. In this embodiment, the housing fasteners 214 are screws that match the housing mounting holes on the left outer housing 211 and the right outer housing 212.

[0125] The top of the left outer shell 211 has a left shell notch 2111, and the right outer shell 212 has a right shell notch 2121 that matches the left shell notch 2111. When the left outer shell 211 and the right outer shell 212 are installed together, the left shell notch 2111 and the right shell notch 2121 are assembled into a replacement opening 213, that is, the main shell 21 has a replacement opening 213 for replacing the striker 40.

[0126] The replacement opening 213 is generally rectangular, with a length greater than the length and width of the striker 40, thereby facilitating the removal of the striker 40 from the replacement opening 213. The replacement opening 213 has a snap-fit ​​positioning notch 2131 at the end away from the striker 40. Furthermore, the projection of the replacement opening 213 onto the plane of the receiving slot opening 5011 overlaps the receiving slot opening 5011a, meaning that the replacement opening 213 completely exposes the receiving slot opening 5011a.

[0127] The inner sides of the left outer casing 211 and the right outer casing 212 also have grid-shaped reinforcing ribs and structures for supporting and fixing internal components such as the motor. At the same time, the left outer casing 211 and the right outer casing 212 also have multiple through holes for heat dissipation and exhaust. The specific structure of the left outer casing 211 and the right outer casing 212 is the existing technology and will not be described in detail.

[0128] The firing pin baffle 22 is detachably mounted on the replacement opening 213. When the firing pin baffle 22 is removed, the replacement opening 213 is exposed, and the firing pin 40 can be conveniently replaced through the replacement opening 213. When the firing pin baffle 22 is installed, the main body housing 21 and the firing pin baffle 22 form an integrated shell 20, which has a higher overall structural strength and completely encloses internal components such as the firing pin drive mechanism 30 and the firing pin 40 in the shell 20, thereby protecting these internal components and also protecting the operator during the nail shooting process.

[0129] Figure 22 1 is a structural diagram of the striker baffle 22 at different angles according to an embodiment of the present invention.

[0130] like Figure 21 and Figure 22 As shown, the striker guard 22 includes a guard inner side 221 and a guard outer side 222. When the striker guard 22 is installed on the replacement opening 213, the guard inner side 221 faces the striker 40. The striker guard 22 also includes a buckle 223, a pair of mounting through holes 224 and a pair of support protrusions 225.

[0131] The inner side surface 221 of the baffle plate has a grid-like reinforcement rib pattern, which serves to strengthen the structural strength of the striker baffle plate 22. The reinforcement ribs are composed of multiple raised ribs, of which the raised rib 2211 located along the longitudinal centerline of the striker baffle plate 22 also serves to limit the striker retainer 44. When the striker 40 is installed on the piston 34 and the striker baffle plate 22 is installed in the replacement opening 213, the raised rib 2211 on the inner side surface 221 of the baffle plate abuts against the crimping top surface 4421 of the striker retainer 44.

[0132] Figure 23 2 is a structural diagram of the engagement between the buckle and the slot in an embodiment of the present invention.

[0133] like Figure 22 and Figure 23 As shown, the buckle 223 is set on the inner side surface 221 of the baffle, and the buckle 223 matches the slot 2113 of the left outer shell 211. The firing pin baffle 22 and the main shell 21 can be engaged with each other through the buckle 223 and the slot 2113, thereby limiting the movement of the firing pin baffle 22 in the nail shooting direction.

[0134] Specifically, the latch 223 includes a first extension 2231 extending generally vertically downward from the inner side surface 221 of the baffle, and a second extension 2232 extending from the end of the first extension 2231 along the length of the striker baffle 22. The second extension 2232 extends into the slot 2113, engaging the latch 223 therewith. The latch 223 also mates with the latch positioning notch 2131. During installation, the latch 223 can be positioned to a predetermined position, i.e., the opening of the slot 2113, via the latch positioning notch 2131. Specifically, after aligning the latch 223 with the latch positioning notch 2131 and pressing it, the latch 223 can be engaged with the slot 2113 by pushing the striker baffle 22 in the direction of nailing. Pushing the striker baffle 22 in the direction of energy storage disengages the latch 223 from the slot 2113.

[0135] The outer side 222 of the baffle plate has multiple anti-slip protrusions 2211, which are used to increase friction when pushing the striker baffle plate 22 to engage or disengage the latch 223. The multiple anti-slip protrusions 2211 are arranged and evenly spaced in the direction of the reciprocating motion described above, and the length of each anti-slip protrusion 2211 is perpendicular to the reciprocating motion direction. The outer side 222 of the baffle plate also has an arrow-shaped indicator protrusion 2212, which indicates the direction of force to be applied when removing the striker baffle plate 22. By pressing the anti-slip protrusion 2211 on the striker baffle plate 22 and pushing the striker baffle plate 22 in that direction, the latch 223 disengages the slot 2113, thereby removing the striker baffle plate 22.

[0136] The mounting holes 224 are used to mount the striker baffle 22 to the striker drive mechanism 30. Two baffle fasteners 226 pass through the two mounting holes 224 and the two baffle mounting holes 3113 on the retaining base 311, respectively, securing one end of the striker baffle 22 to the retaining base 311. The mounting holes 224 and the clips 223 are provided on either side of the striker baffle 22 along its length, with the mounting hole 224 located on the side closest to the striker 40.

[0137] The support protrusions 225 are used to support the striker guard 22 after it is installed on the main housing 21, preventing it from being forced into the replacement opening 213. A pair of support protrusions 225 are located on either side of the striker guard 22 along its width. The shape and position of the support protrusions 225 correspond to the shape and position of the pair of supporting protrusions (i.e., the left supporting protrusion 2112 and the right supporting protrusion 2122 described above). When the striker guard 22 is installed on the main housing 21, the support protrusions 225 abut against the supporting protrusions.

[0138] After removing the striker baffle 22, the replacement opening 213 is exposed, and the mounting portion 41 of the striker 40 and the corresponding striker fixing member 44 are exposed from the replacement opening 213. The striker fixing member 44 can now be easily removed and the striker 40 to be replaced can be removed. After the striker 40 to be replaced is removed, the receiving groove opening 3311 is exposed from the replacement opening 213, and a new striker 40 can now be easily installed. Specifically, the new striker 40 is inserted into the striker receiving groove 5011 through the receiving groove opening 5011a, and the mounting hole 411 of the striker 40 is aligned with the striker mounting hole 34131 on the piston 34. The striker fixing member 44 is then inserted into the mounting hole 411 and the striker mounting hole 34131 and pressed firmly to complete the installation of the new striker 40.

[0139] After the new striker 40 is installed, the striker baffle 22 can be installed again, and the main housing 21 and the striker baffle 22 form a complete housing 20.

[0140] At the same time, if Figure 21 As shown, when the striker drive mechanism 30 is installed in the housing 20, the direction and position of the opening of the regulatory frame 31 also correspond to the replacement opening 213. Therefore, after removing the striker baffle 22, the piston 34, spring assembly 33, etc. in the regulatory frame 31 can also be inspected through the replacement opening 213 and the opening of the regulatory frame 31.

[0141] The nail feeding mechanism 60 is used to sequentially feed multiple nails to the gun nozzle 50, and then the firing pin driving mechanism 30 drives the firing pin 40 to strike and shoot the nails at the gun nozzle 50. The specific structure of the nail feeding mechanism 60 is prior art and will not be described in detail here.

[0142] As described above, the firing pin drive mechanism 30 and the nail gun 10 of the embodiment of the present invention adopt a composite structure and a lightweight piston 34, and the firing pin drive mechanism 30 adopts a low resistance structure such as a rolling element 35, thereby effectively improving the nailing force without increasing energy consumption.

[0143] <Example 2>

[0144] This embodiment provides a firing pin drive mechanism and a nail gun. Compared with the first embodiment, the difference is that the piston of this embodiment is made of different materials and is obtained through a different production method.

[0145] Figure 24 1 is a structural diagram of a piston according to an embodiment of the present invention.

[0146] Figure 25 1 is an exploded view of the piston according to an embodiment of the present invention.

[0147] like Figure 24 and Figure 25As shown, the piston 34 of this embodiment includes a piston body 341 , a first piston protection member 342 and a second piston protection member 343 .

[0148] The piston body 431 is made of plastic, and the first piston protection member 342 and the second piston protection member 343 are iron components. The production method is to use a corresponding mold to cast plastic onto the iron component to form an iron-plastic composite integral part.

[0149] like Figure 21 As shown, the second piston guard 343 has a guard connection portion 3431 with a plurality of irregularly shaped through-holes. During pouring, molten plastic flows through these through-holes, thereby forming a secure fit between the piston body 431 and the second piston guard 343 after cooling and molding. Furthermore, the striker mounting portion 3413 of this embodiment is also formed on the second piston guard 343.

[0150] After the integrated piston 34 is formed in the above manner, the structure and function of the piston 34 of this embodiment are consistent with those of the piston 34 of the first embodiment.

[0151] In this embodiment, other structures and corresponding working principles are the same as those in the first embodiment and will not be described again.

[0152] <Example 3>

[0153] This embodiment provides a firing pin drive mechanism and a nail gun, wherein the structure of the piston body is as follows: Figure 7 and Figure 8 As shown, compared with the first embodiment, the difference is that the piston protection member of this embodiment is a protective coating and is made of different materials.

[0154] In this embodiment, the piston body 341 is an aluminum component, and the protective coating is a titanium coating, which is respectively coated on the first push portion 3414 and the second push portion 3415. The coating range corresponds to the range covered by the first piston protection component 342 and the second piston protection component 343 in Example 1.

[0155] In this embodiment, other structures and corresponding working principles are the same as those in the first embodiment and will not be described again.

[0156] Example Function and Effect

[0157] According to the firing pin drive mechanism 30 and the nail gun 10 provided in the first embodiment of the present invention, the firing pin drive mechanism 30 includes a regulating frame 31, a piston 34, a spring assembly 33 and a pushing member 36. The spring assembly 33 includes a first force supply spring 331 and a second force supply spring 332, both of which are fixed on the regulating frame 31 at one end and abut against the piston 34 at the other end. Therefore, the two force supply springs can provide power for the movement of the piston 34, drive the piston 34 to move and drive the firing pin 40 installed on the piston 34 to strike the nail, and the pushing member 36 can push the piston 34 toward the direction of the spring assembly 33, thereby compressing and storing energy for the first force supply spring 331 and the second force supply spring 332 at the same time; the piston 34 includes a piston body 341 and a piston body 341 installed on the piston body 341 The first piston guard 342 and the second piston guard 343 are positioned upward and toward the push member 37. Since the piston body 341 is made of aluminum, the overall weight of the piston 34 in Example 1 is significantly reduced compared to the iron pistons of the prior art. Therefore, the nail gun 10 of Example 1 can effectively increase nail-shooting force without increasing energy consumption. When the piston 34 is pushed by the push member 37, the push member 37 directly abuts and pushes the first piston guard 342 and the second piston guard 343, thereby pushing the piston 34. Since the first and second piston guards 342 and 343 are made of iron and are more wear-resistant, they protect the aluminum piston body 341, thereby extending the service life of the piston 34.

[0158] Specifically, the piston body 341 has a first push portion 3414 extending along the nail shooting direction and a second push portion 3415 extending toward the pushing member 37 and perpendicular to the first push portion 3414. The first piston protection member 342 is covered on the outer surface of the first push portion 3414 to form a first push end 345. The second piston protection member 343 is covered on the outer surface of the second push portion 3415 to form a second push end 346. The first piston protection member 342 and the second piston protection member 343 are both made of iron. Therefore, the piston 34 has a wear-resistant first push end 345 and a second push end 346, so that the piston 34 wears very little during the reciprocating motion. Accordingly, the service life of the piston 34 is longer.

[0159] Furthermore, due to the presence of the regulating frame 31 and guide rod 32, the piston 34 is movably coupled to the guide rod 32 via the coupling hole 34121. A pair of rolling elements 35 are rollably engaged on either side of the piston 34 and abut against the corresponding regulating plates 313. Therefore, the regulating frame 31, guide rod 32, and rolling elements 35 regulate the movement direction of the piston 34, limiting it to a predetermined reciprocating direction and preventing it from moving or deflecting in other directions. Furthermore, because the regulating frame 31 is an open, removable square frame and the two regulating plates 313 are provided with multiple lightening holes 3131, the regulating frame 31 of this embodiment is lighter overall than existing cylinder-type regulating structures, thereby reducing user labor intensity. Furthermore, the open, removable frame also facilitates easier inspection and maintenance.

[0160] Furthermore, because the diameter of the sleeve through-hole 34121 is larger than the diameter of the guide rod 32 and the inner wall of the sleeve through-hole 34121 is smooth, the friction between the piston 34 and the guide rod 32 is very small during movement. Furthermore, because the piston 34 abuts the regulating plate 313 via a pair of rolling elements 35 (steel balls) rather than directly contacting the regulating plate 313, the friction between the piston 34 and the regulating plate 313 is also very small during movement. Furthermore, the multiple exhaust through-holes 34113 provided in the piston 34 reduce wind resistance during movement of the piston 34. Therefore, the first embodiment also provides a low-resistance piston structure that can effectively increase nail-driving force without increasing energy consumption.

[0161] Furthermore, the pushing member 37 is a cam mounted on the output end of the drive motor 38. The cam has a first pushing protrusion 3711 and a second pushing protrusion 3712, which correspond to the first push end 345 and the second push end 346, respectively. Therefore, the drive motor 38 can drive the pushing member 37 to rotate. When the pushing member 37 rotates, the second pushing protrusion 3712 first abuts and pushes the second push end 346, and the second push end 346 applies an arc-shaped pushing force toward the energy storage direction to the piston 34. Under the action of this pushing force and the regulating structure, the piston 34 moves toward the energy storage direction, thereby compressing the two force supply springs and completing the first stage of energy storage. Subsequently, when the pushing member 37 continues to rotate, the second pushing protrusion 3712 disengages from the second push end 346, and at the same time, the first pushing protrusion 3711 abuts and pushes the first push end 345, thereby completing the second stage of energy storage in the same manner. Therefore, the firing pin drive mechanism 30 of the first embodiment can perform two-stage compression energy storage, thereby obtaining a greater ejection force. At the same time, a one-way bearing 39 is also installed at the output end of the drive motor 38, so the cam will not reverse during the energy storage process and after the energy storage is completed, thereby avoiding the situation of accidentally shooting nails and improving the safety factor.

[0162] Furthermore, the main housing 21 of the nail gun 10 has a replacement opening 213, and the firing pin retainer 22 is removably mounted on the replacement opening 213. This replacement opening 213 fully exposes the mounting portion 41 of the firing pin 40 and the accommodating slot opening 5011a of the firing pin accommodating slot 5011. Therefore, after removing the firing pin retainer 22, the firing pin 40 can be quickly and easily replaced through the replacement opening 213. Furthermore, the replacement opening 213 corresponds to the opening direction and position of the control frame 31. Therefore, the control frame 31 and its internal components, such as the piston 34 and spring assembly 33, can also be inspected through the replacement opening 213.

[0163] In the second embodiment, the first and second piston guards 342 and 343 are both made of iron, while the piston body 341 is made of plastic. This is cast onto the first and second piston guards 342 and 343 using an iron-plastic composite method, forming a single piece. Because the piston body 341 is made of plastic, the piston 34 of the third embodiment is lighter overall, resulting in a correspondingly stronger nail-driving force for the nail gun 10. Furthermore, the iron-plastic composite method offers the advantages of easy processing and low cost.

[0164] In the third embodiment, the first and second abutting portions 3414, 3415 of the piston 34 are each coated with a titanium coating to form a wear-resistant protective layer. Because titanium has a higher strength, the service life of the piston 34 is further increased. Furthermore, since only the two abutting portions of the piston 34 need to be coated, the coating area is small, thus reducing the cost.

[0165] The above embodiments are only used to illustrate specific implementations of the present invention, and the present invention is not limited to the description scope of the above embodiments.

[0166] In the above-mentioned embodiment 1, the guide rod 32 is a circular rod. Accordingly, the guide rod mounting hole 3111 of the limiting base 311, the limiting through hole 3121 of the limiting plate 312 and the sleeve through hole 34121 of the piston 34 are all circular through holes that match them. In other schemes of the present invention, the guide rod 32 can also be a square rod, that is, its cross-section along the nail shooting direction is set to be square. Accordingly, the guide rod mounting hole 3111, the limiting through hole 3121 and the sleeve through hole 34121 are all square through holes that match them. The square guide rod 32 and the corresponding square holes can also play a regulating role on the piston 34, so that it cannot make a circular motion around the guide rod 32, thereby achieving a better regulation effect.

[0167] In the above-mentioned embodiment 2, the piston body 341 is made of plastic, and is cast on an iron component to form an iron-plastic composite integral part. In other schemes of the present invention, the piston body 341 can also be an inlaid part made of plastic, and is inlaid to form an iron-plastic composite integral part with the first piston protection part 342 and the second piston protection part 343 to form an iron-plastic composite integral part.

Claims

1. A firing pin drive mechanism, installed in a housing of a nail gun and used to drive a firing pin to strike a nail, wherein the gun nozzle of the nail gun has a firing pin receiving groove, and the firing pin is slidably engaged with the firing pin receiving groove, characterized in that: include: A regulatory frame, comprising two mutually parallel regulatory plates, both of which extend along the length direction of the regulatory frame; a guide rod, mounted in the regulatory frame and extending along the length direction of the regulatory frame; a piston housed within the regulatory frame; a pair of spherical rolling elements; at least one power supply spring, one end of which abuts against the regulating frame and the other end of which abuts against the piston, for providing power for the movement of the piston; as well as The pushing member has two pushing ends facing the piston, and is used to push the piston toward the force supply spring in sequence, so that the force supply spring performs two-stage compression energy storage. Wherein, the striker is mounted on the piston, The piston comprises: a piston body constructed of lightweight material; and Two piston protection members are matched with the two pushing ends respectively, mounted on the piston body and facing the pushing member, the piston protection member is made of wear-resistant material, and the two piston protection members are mounted on the piston to form a first push end and a second push end respectively corresponding to the two pushing ends. Wherein, the piston body has: a sleeve connection portion, provided in the middle of the piston body, having a sleeve connection through hole for sleeve connection of the piston to the guide rod; a main body portion, configured to compress the force supply spring; and The firing pin mounting portion is used to fix the firing pin. The main body has a plurality of exhaust holes, which are distributed around the sleeve through hole and are centrally symmetrically distributed with the central axis of the sleeve through hole as the center. The extension direction of the exhaust through hole is consistent with the length direction of the guide rod. The main body has rolling element grooves on both sides facing the two regulating plates. The two rolling elements are respectively rotatably embedded in the two rolling element grooves and respectively abut against the inner side surfaces of the regulating plates on the corresponding sides. The piston is not in direct contact with the regulating plates.

2. The striker drive mechanism according to claim 1, wherein: in, The piston body is made of aluminum and has a push portion extending toward the pushing member. The piston protection member is made of iron and covers the push portion.

3. The firing pin drive mechanism according to claim 1, wherein: in, The piston protection member is made of iron. The piston body is made of plastic and is cast on the piston protection member by an iron-plastic composite method to form an integral part.

4. The striker drive mechanism according to claim 1, wherein: in, The piston body is made of aluminum and has a push portion extending toward the pushing member. The piston protection piece is a titanium coating, which is coated on the push portion.

5. The striker drive mechanism according to claim 1, wherein: in, The force supply spring is sleeved on the guide rod.

6. The firing pin drive mechanism according to claim 5, wherein: in, The guide rod is a round rod. The sleeve through hole is a circular through hole that matches the guide rod.

7. The striker drive mechanism according to claim 5, wherein: in, The guide rod is a square rod. The sleeve through hole is a square through hole that matches the guide rod.

8. The firing pin drive mechanism according to claim 1, wherein: in, The first pushing end extends from the piston along the nail shooting direction, The second pushing end extends from the piston perpendicular to the first pushing end and toward the pushing member. The pushing member includes a wheel body, and a first pushing protrusion and a second pushing protrusion provided on the wheel body and facing the piston. The first pushing protrusion and the second pushing protrusion are the pushing ends. The first pushing protrusion corresponds to the arrangement of the first pushing end, and the height of the first pushing protrusion is higher than that of the second pushing protrusion. The second pushing protrusion corresponds to the arrangement of the second pushing end. When the wheel body rotates, the second pushing protrusion contacts the second pushing end and pushes the second pushing end, causing the piston to move toward the force supply spring, thereby causing the force supply spring to perform the first stage of energy storage. After completing the first stage of energy storage, the first pushing protrusion abuts against the first pushing end and pushes the first pushing end, so that the piston moves toward the force supply spring, thereby causing the force supply spring to perform the second stage of energy storage.

9. The striker drive mechanism according to claim 8, wherein: Also includes: a drive motor, configured to drive the pushing member to rotate, thereby driving the pushing end to move, and further pushing the piston to move toward the force supply spring; as well as One-way bearing, installed at the output end of the drive motor, Wherein, the wheel body is installed at the output end of the driving motor.

10. A nail gun, characterized in that: At least: Firing pin, used for striking nails; as well as A firing pin drive mechanism, used to drive the firing pin to move, Wherein, the firing pin drive mechanism is the firing pin drive mechanism described in any one of claims 1 to 9.

11. The nail gun according to claim 10, characterized in that: Also includes: The housing includes a main body housing and a firing pin baffle. The firing pin has at least a mounting portion for detachably mounting the firing pin to the piston. The main housing has a replacement opening, the position of which corresponds to the mounting portion. The firing pin baffle is detachably mounted on the replacement opening.

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