Power type code nail gun

Abstract

The utility model relates to a power type code nail gun, and belongs to the technical field of tools. The code nail gun comprises a shell with a grab handle, and an air cylinder, a lifting mechanism, a nailing seat and a nail box assembly which are arranged on the shell, the front end of a piston in the air cylinder is connected with a firing pin extending to a nail passing channel of the nailing base, the firing pin is meshed with a driving wheel assembly of the lifting mechanism through lifting teeth on one side, and one side of the nail passing channel of the nailing base is communicated with a nail conveying channel of the nail box assembly. The limiting face, away from the nail box assembly, of the nail passing channel comprises a lower plane close to the nail outlet and an upper plane away from the nail outlet, the upper plane and the lower plane are parallel to the nailing direction, and the upper plane is connected with the lower plane through a middle inclined face enabling the nail passing channel to be gradually expanded. Therefore, the U-shaped nail can be always perpendicular to the surface of the workpiece, the front end of the firing pin always acts on the rear end of the U-shaped nail without slipping, and stable nailing quality and smooth and attractive surface of the workpiece are ensured.

Description

Technical Field

[0001] The utility model relates to a fastener driving device, in particular to a power type nail gun, belonging to the technical field of tools. Background Art

[0002] Various types of fastener drivers that drive various fasteners such as coil nails, pattern nails, code nails, straight nails, plastic nails, etc. into workpieces have been widely used. These fastener drivers use various energy conversion devices (such as the elastic recovery force released after spring or air compression, the mechanism kinetic energy released by flywheel energy storage, and electrical energy conversion, etc.) to achieve driving operation and drive the fasteners into the workpiece.

[0003] A Chinese patent (Application No. 202020150771.X, Publication No. CN211967374U) discloses a typical structure of a "fastener driver" (commonly known as a nail gun because the fastener is a U-shaped nail with a round cross-section as shown in Figure 18), including a housing, a cylinder disposed in the housing, and a piston positioned in the cylinder and movable in the cylinder. The fastener driver also includes a nose frame (i.e., a nailing seat) that at least partially defines a fastener nailing channel, and a driving blade (i.e., a firing pin). The fastener is driven through the fastener nailing channel. The driving blade is attached to the piston and can move with the piston to drive the fastener through the fastener nailing channel. The driving blade includes an axial guide protrusion for guiding the driving blade in the nose frame, and wherein the axial guide protrusion terminates before the distal end of the driving blade.

[0004] A problem that is prone to occur during operation of this type of fastener driver is that when the striker with a side chamfer structure on the front end face impacts the rear end of a fastener such as a U-shaped nail, causing its front end to be driven into the workpiece along the nail passage of the nail driving seat, the front end of the fastener such as the U-shaped nail often tends to deviate toward the nail magazine side due to various reasons, and cannot maintain an ideal state of always being perpendicular to the workpiece. As a result, the front end of the striker will slip off the rear end of the U-shaped nail during the striking process and touch the workpiece surface together with the U-shaped nail from the side away from the nail magazine, which not only affects the striking effect of the fastener, but also causes pit damage on the workpiece surface.

[0005] To this end, the "powered fastener driver" disclosed in the Chinese patent application number 202320644069.2 and publication number CN219854401U deliberately tilts the box (i.e., nail box) to the drive axis at a certain angle or tilts the fastener channel such as U-shaped nails to the box at a certain angle (see its Figure 6 A and Figure 6 B) to effectively prevent the front end of the firing pin from "slipping off" the rear end of the U-shaped nail, which complicates the structure and increases the difficulty of the process. Utility Model Content

[0006] The purpose of the utility model is to provide a power nail gun which can effectively avoid the "slippage" of the firing pin without changing the basic structure, thereby ensuring the nailing quality without substantially increasing the manufacturing cost, in view of the problems existing in the above-mentioned prior art.

[0007] In order to achieve the above-mentioned purpose, the basic technical scheme of the power nail gun of the utility model is as follows: comprising a housing with a handle and a cylinder, a lifting mechanism, a nailing seat and a nail magazine assembly arranged in the housing;

[0008] The front end of the piston in the cylinder is connected with the striker extending to the nail passing channel of the nail driving seat, and the striker is meshed with the driving wheel assembly of the lifting mechanism through the lifting teeth on one side, and one side of the nail passing channel of the nail driving seat is connected with the nail feeding channel of the nail magazine assembly;

[0009] The limiting surface of the nail passage away from the nail magazine assembly includes a lower plane adjacent to the nail outlet and an upper plane away from the nail outlet, the upper plane and the lower plane are parallel to the nailing direction, and the upper plane is connected with the lower plane through an intermediate inclined plane that gradually expands the nail passage.

[0010] In this way, when the front end face of the striker impacts the rear end of a fastener such as a U-shaped nail, the nail passage gradually expands through the middle inclined surface. Therefore, the front end of the U-shaped nail will have a tendency to slightly tilt toward the middle inclined surface to compensate for the tendency of its front end to tilt toward the nail magazine side, keeping the U-shaped nail always perpendicular to the workpiece surface, and the front end of the striker always acts on the rear end of the U-shaped nail without slipping, ensuring stable nailing quality and a smooth and beautiful workpiece surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0012] Figure 2 yes Figure 1 A schematic diagram of a partial three-dimensional structure with the housing, trigger and circuit removed;

[0013] Figure 3 yes Figure 2 A schematic diagram of a partial three-dimensional structure with the front-extending nailing seat removed;

[0014] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure from another perspective;

[0015] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the firing pin of the embodiment;

[0016] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the forward-extending nail driving seat of the embodiment;

[0017] Figure 7 yes Figure 1 A schematic diagram of the cross-sectional structure of the front extending nail driving seat and the nail magazine assembly in the embodiment;

[0018] Figure 8 yes Figure 1 A schematic cross-sectional view of the firing pin of the embodiment in a state ready to fire;

[0019] Fig. 9 yes Figure 1 A schematic cross-sectional view of the structure of the firing pin of the embodiment in a lifting limit state.

[0020] In the figure: 8 nail delivery channel, 9 U-shaped nail, 9a nail cap, 10 fastener driver, 11 driving axis, 100 striker, 101 base, 102 guide part, 103 front end surface, 104 hole, 105 lower surface, 106-110 lifting teeth, 20 rear nailing seat, 201 support surface, 21 driving wheel assembly, 210 cylindrical pin, 23 cylinder, 30 forward nailing seat, 301 guide groove, 302 front positioning hole, 303 middle positioning hole, 304 through hole, 310 lower plane, 320 middle inclined surface, 330 upper plane, 340 main body, 40 nail magazine assembly, 50 movable nail magazine, 51 sliding positioning block, 52 nail pushing plate, 511 front nail passage, 512 first protrusion, 60 fixed nail magazine, 61 Fixed positioning block, 611 rear nail passage, 612 second protrusion, 70 lifting mechanism, 72 motor, 80 workpiece striking assembly, 81 striking head, 82 workpiece protection sleeve, 83 trigger. DETAILED DESCRIPTION Example

[0021] The powered nail gun 10 of this embodiment is as follows: Figure 1 — Figure 4 As shown, it includes a housing K with a handle W, in which a cylinder 23, a lifting mechanism 70, a nailing seat and a nail magazine assembly 40 are installed. When in use, the U-shaped nails 9 held in the nail magazine assembly 40 can be driven into the workpiece. The front end of the piston in the cylinder 23 is connected with a striker 100 extending to the nail passing channel of the nailing seat. The striker 100 is engaged with the driving wheel assembly 21 of the lifting mechanism 70 through the lifting teeth 106-110 on one side, and the nail passing channel side is connected to the nail feeding channel 8 of the nail magazine assembly 40. The structure of the striker 100 is shown in FIG. Figure 5As shown, its elongated base 101 has a front end face 103 perpendicular to the drive axis 11 (i.e., the nailing direction), which is used to strike the U-shaped nail 9 delivered from the nail magazine assembly 40 and strike it into the workpiece along the drive axis 11. The first edge of the base 101 extending along the drive axis 11 forms a plurality of lifting teeth 106-110. During the period when the striker 100 returns from the driving position to the ready-to-fire position or from the ready-to-fire position to the top dead center (i.e., the lifting limit) position, the lifting teeth 106-110 are sequentially engaged with the driving wheel assembly 21. The front part of the striker 100 has a raised guide portion 102, and the rear part has a hole 104 connected to the piston through a connecting piece. Its lower surface 105 is parallel to the support surface 201 of the rear nailing seat 20, so that the striker 100 is supported during reciprocating motion. These basic structures are the same as those in the prior art and will not be described in detail.

[0022] The nailing seat is composed of a front nailing seat 30 and a rear nailing seat 20, wherein the front nailing seat 30 is as shown in FIG. Figure 6 As shown, the elongated body 340 extends along the direction of the drive axis 11, and the lower plane 310 has a guide groove 301 adapted to the guide portion 102 of the striker 100 (see Figure 7 The front positioning holes 302 on both sides of the front part are in contact with the first protrusions 512 of the sliding positioning block 51 of the movable nail magazine 50 for positioning; the middle positioning hole 303 is in contact with the second protrusion 612 of the fixed positioning block 61 of the fixed nail magazine 60 for positioning; the through hole 304 is used for fixed connection with the forward extending nail seat 30 by means of a connecting member (for example, a bolt, a screw, etc.).

[0023] After the front nail passage 511 and the rear nail passage 611 respectively disposed on the movable nail magazine 50 and the fixed nail magazine 6 of the nail magazine assembly 40 are connected and fixedly connected to the front extending nail driving seat 30, a nail passage is formed, which is away from the limiting surface of the nail magazine assembly 40. Figure 6 As shown, it is actually composed of a lower plane 310 adjacent to the nail outlet, an upper plane 330 away from the nail outlet, and an intermediate inclined plane 320 connecting the upper plane 330 and the lower plane 310, resulting in a gradual expansion of the nail passage. It can be seen that, obviously different from the structure of the nail passage on the nose frame (nail seat) in the prior art, the nail passage of this embodiment is actually composed of a front nail passage 511 and a rear nail passage 611 connected and fixedly connected to the front extending nail seat 30, which has better processability in both manufacturing and assembly, and better nailing reliability.

[0024] The driving wheel assembly 21 of the lifting mechanism 70 in the power nail gun 10 is meshed with the lifting teeth 106-110 of the firing pin 100 through the cylindrical pin 210, and is used to drive the firing pin 100 to move in the cylinder 23 to drive the piston to compress the gas in the cylinder 23 to store energy.

[0025] More specifically, if Figure 8As shown, when the fastener driver 10 is in the energy storage and firing state, the distance between the front end surface 103 of the firing pin 100 and the rear end nail cap 9a of the U-shaped nail 9 is D1, that is, the firing pin 100 partially overlaps with the U-shaped nail 9. This is used to prevent personal safety accidents caused by mis-driving of the power nail gun. The length of D1 is about 1mm to 5mm. When the power code nail gun 10 is in the excited state, that is, the driving wheel assembly 21 drives the firing pin 100 to be lifted from the ready-to-fire position to the upper stop point (i.e., the lifting limit), when the firing pin 100 is at the upper stop point, the distance between the front end face 103 of the firing pin 100 and the nail cap 9a of the U-shaped nail 9 is D2; while the firing pin 100 is lifted, the nail pushing plate 52 of the nail magazine assembly 40, under the action of the nail pushing spring (not shown), transports the sequentially arranged U-shaped nails 9 along the nail feeding channel 8 to the lower plane 310 of the forward extending nail seat 30, and before the firing pin 100 is at the upper stop point, the U-shaped nails 9 contact the lower plane 310 of the forward extending nail seat 30 and stop moving; the nail feeding channel 8 is perpendicular to the driving axis 11. At this time, the length D2 is more than 5 mm. At the same time, the minimum distance between the lower plane 310 of the forward extending nail seat 30 and the fixed positioning block 61 is D4, which is approximately 1 times the thickness of the nail; the maximum distance between the upper plane 330 of the forward extending nail seat 30 and the sliding positioning block 51 is D3, which is approximately 1 to 1.5 times the thickness of the nail; and D3 must be greater than D4, which is used to ensure that the firing pin 100 drives the U-shaped nail 9 into the workpiece, and the rear end nail cap 9a of the U-shaped nail 9 and the front end face 103 of the firing pin 100 will not slip or deviate, thereby avoiding the front end face 103 of the firing pin 100 from causing concave damage on the surface of the workpiece.

[0026] like Fig. 9 As shown, the firing pin 100 fires and drives the U-shaped nail 9 into the workpiece, that is, the firing pin 100 is at the lower dead point (the striking limit position), and the guide portion 102 of the firing pin 100 is received in the guide groove 301 of the forward nailing seat 30, providing lateral stability for the firing pin 100; the U-shaped nail 9 is received in the nail passage channel composed of the sliding positioning block 51, the fixed positioning block 61 and the forward nailing seat 30 along the direction of the driving axis 11.

[0027] During operation, before the firing cycle is started, the striker 100 is kept in the ready-to-fire position, wherein the piston is not at the top dead center (i.e., the lifting limit) in the cylinder 23. When the workpiece protection sleeve 82 abuts against the workpiece surface and drives the striking head 81 to move together under the action of external force, the workpiece striking assembly 80 provides a firing signal to the circuit controller (not shown); if the trigger 83 is pulled to start the firing cycle, the motor 72 is started to drive the drive wheel assembly 21 from Figure 3 The reference system rotates counterclockwise, so that the striker 100 moves toward the top dead center (i.e., the lifting limit). The instantaneous position of the striker 100 reaching the top dead center (i.e., the lifting limit) is referenced to Figure 4At the same time, the nail pushing plate 52 of the nail magazine assembly 40, under the action of the nail pushing spring, pushes the sequentially arranged U-shaped nails 9 forward along the nail feeding channel 8 to the lower plane 310 of the nailing seat 30. The motor 72 is kept started to make the driving wheel assembly 21 continue to rotate counterclockwise. When the cylindrical pin 210 of the driving wheel assembly is disengaged from the lifting tooth 106 of the firing pin 100; at this time, the piston and the firing pin 100 are driven to the bottom dead center by the compressed gas in the cylinder 23. Under the action of the compressed gas, the front end surface 103 of the firing pin 100 contacts the nail cap 9a of the U-shaped nail 9 and drives the U-shaped nail 9 to move to the bottom dead center and drive the U-shaped nail 9 into the workpiece; the motor 72 is kept started to make the driving wheel assembly 21 continue to rotate counterclockwise. When the cylindrical pin 210 of the driving wheel assembly contacts the lifting tooth 106 of the firing pin 100 and rotates to the set ready-to-fire position, the motor 72 stops rotating. At this time, the power code nail gun 10 completes a working cycle.

[0028] The power-type nail gun of this embodiment has a simple structure, which effectively reduces the manufacturing cost, and the nail passage channel of the U-shaped nail 9 is formed by the forward nail seat 30, the sliding positioning block 51 and the fixed positioning block 61, wherein the guide groove 301 of the forward nail seat 30 only accepts the guide part 102 of the firing pin 100, and the U-shaped nail 9 is received in the nail passage channel formed by the sliding positioning block 51 and the fixed positioning block 61, which has high stability, safety and reliability.

[0029] It should be noted that the above-mentioned "top", "bottom", "upper", "lower", "front", "back", "inner", "outer", etc. are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and is not restrictive. In addition to the above-mentioned embodiments, the utility model can also have other implementation methods. All technical solutions formed by equivalent replacement or equivalent deformation fall within the protection scope required by the utility model.

Claims

1. A powered nail gun, comprising a housing with a handle, and a cylinder, a lifting mechanism, a nailing seat and a nail magazine assembly arranged in the housing; The front end of the piston in the cylinder is connected with the striker extending to the nail passing channel of the nail driving seat, and the striker is engaged with the driving wheel assembly of the lifting mechanism through the lifting teeth on one side, and one side of the nail passing channel of the nail driving seat is connected with the nail feeding channel of the nail magazine assembly; it is characterized in that: The limiting surface of the nail passage away from the nail magazine assembly includes a lower plane adjacent to the nail outlet and an upper plane away from the nail outlet, the upper plane and the lower plane are parallel to the nailing direction, and the upper plane is connected with the lower plane through an intermediate inclined plane that gradually expands the nail passage.

2. The powered nail gun according to claim 1, characterized in that: The nailing seat is composed of a front nailing seat and a rear nailing seat which are fixedly connected. The elongated main body of the front nailing seat extends along the driving axis direction, and the lower plane thereof has a guiding groove adapted to the firing pin guide portion.

3. The powered nail gun according to claim 2, characterized in that: The nail magazine assembly comprises a movable nail magazine and a fixed nail magazine, and the nail passing channel is formed by a front nail passing channel and a rear nail passing channel respectively arranged on the movable nail magazine and the fixed nail magazine, which are connected and fixedly connected to a forward extending nail driving seat.

4. The powered nail gun according to claim 3, characterized in that: The front positioning holes on both sides of the front part of the nail driving seat are contacted and positioned with the first protrusion of the sliding positioning block of the movable nail box, and the middle positioning hole is contacted and positioned with the second protrusion of the fixed positioning block of the fixed nail box.

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