Fastener striking drive tool

Abstract

The present application relates to a kind of fastener hitting driving tools, belong to tool technical field.The tool includes energy storage unit, touch unit, nail conveying unit, nail driving unit, lifting unit;Nail driving seat on the front end of shell is equipped with floating nail feeding plate through guide pin sleeve, and hinged openable and closable cover plate;The end of the striker of nail driving unit has nail conveying protrusion;Nail feeding plate has the inclined surface of nail conveying protrusion meshing, the perforation of nail feeding plate is inserted and simultaneously passes through the nail feeding rod of nail driving seat lower part through hole, the reset spring that the nail feeding rod is equipped with makes it tend to lower position;Nail driving seat is equipped with the nail feeding claw of the ratchet tooth like nail pushing tooth with the tendency nail conveying channel, nail feeding claw is hinged to nail feeding rod;Cover plate is hinged to restrict nail one-way delivery nail stopping claw.The present application sets up nail conveying protrusion on striker and is matched with nail mechanism, i.e. reasonably by the reciprocating motion of original striker is realized the required automatic nail feeding action, movement conversion is simple, compact structure, few parts, high reliability, cost-effective.

Description

Technical Field

[0001] This invention relates to a fastener striking tool, and more particularly to an electric fastener striking drive tool, belonging to the field of power tool technology. Background Technology

[0002] Fastener-driving tools such as nail guns use compressed air to power a piston in a cylinder, which in turn drives a firing pin to drive nails into the workpiece. They are commonly used tools in industries such as construction and decoration. A typical structure of existing electric nail guns is disclosed in Chinese patent document application number 202180025167.1, entitled "Powered Fastener Driver." Its cylinder and piston within the housing constitute an energy storage mechanism. The front end of the nail-driving base is equipped with a retractable nozzle and a nail magazine on one side. A nail magazine is also located on one side of the nozzle. Between the handle and the nail magazine is an electric lifting mechanism that drives the piston to compress and store energy. The lifting mechanism contains a drive wheel that meshes with the firing pin, and the drive wheel is connected to a motor. When the nozzle is pressed down, the motor is activated, driving the firing pin from a temporarily locked, ready position to compress air through the lifting mechanism. Once the firing pin disengages from the lifting mechanism, it is suddenly released, striking the row of nails pushed into the nail-driving base by a nail pusher in the nail magazine, thus ejecting them from the nozzle. To automatically load nails from the nail magazine into the nail holder after nailing, thus preparing for the next nailing operation, electric nail guns, unlike traditional pneumatic nail guns which use high-pressure gas for this action, use an electric motor as a power source to drive an additional nail loading mechanism. A typical structure can be found in US Patent No. US11376721B2. This type of technical solution, due to the need for a complex nail loading mechanism, has high manufacturing costs and is difficult to assemble and maintain. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by utilizing the existing mechanism to drive a fastener-driving tool for nailing, thereby reducing manufacturing costs and facilitating assembly and maintenance.

[0004] To achieve the above objectives, the basic technical solution of the fastener striking drive tool of the present invention includes:

[0005] The energy storage unit consists of an air storage chamber and a cylinder located inside the casing;

[0006] The striking unit consists of a retractable striking head at the front of the housing and a striking switch; its characteristic is:

[0007] The nail feeding unit consists of a nail box and a nail feeding mechanism on one side of the nailing channel in the nailing seat.

[0008] The nail-driving unit consists of a firing pin connected to a cylinder piston and extending toward the nail-driving seat, one end of which has a nail-feeding protrusion;

[0009] The lifting unit consists of a motor-driven lifting wheel that meshes with the firing pin;

[0010] The nail-driving base is equipped with a floating mechanism driven by the nail-feeding protrusion, and the floating mechanism is equipped with a nail-feeding claw that lifts the nail into the nail-feeding channel.

[0011] A further improvement of the present invention is that: a floating nail feeding plate is mounted on the nailing base via a guide pin; the nail feeding plate has a nail feeding inclined surface that engages with the nail feeding protrusion; the through-hole of the nail feeding plate simultaneously passes through a nail feeding rod in the lower through hole of the nailing base; and the nail feeding rod is equipped with a return spring that tends to lower the nailing position.

[0012] The nail-driving seat is equipped with a nail-feeding claw with ratchet-shaped nail-feeding teeth that guide the nail feeding channel, and the nail-feeding claw is hinged to the nail-feeding rod.

[0013] A further improvement to the present invention is that a cover plate is installed on one side of the nail-driving seat, and the cover plate is hinged with a nail-stopping claw to restrict the unidirectional transport of nails.

[0014] During operation, the nail feeding unit feeds the nails wound in the nail magazine one by one into the nailing channel at the nozzle. The lifting unit converts the motor's power into gas compression energy in the gas storage chamber of the energy storage unit through piston movement. When the nozzle is pressurized and triggers the contact switch, it drives the firing pin of the nailing unit to eject the nails in the nailing channel, completing the required fastening operation. When the firing pin retracts after nailing, it drives the nail feeding plate's feeding ramp through the nail feeding protrusion, causing it and the nail feeding rod to be lifted and floated against the action of the return spring. This, in turn, causes the nail-feeding teeth to extend into the nail feeding claws in the nail row intervals, lifting and floating the nails at the top of the nail row from the nail feeding channel into the nailing channel, preparing for the next nailing action. Afterward, under the action of the return spring, the nail feeding rod, along with the nail feeding claws and the nail feeding plate, will descend and return to their original position. During this process, due to the one-way restraint of the nail-stopping claws, the nails in the nailing channel and the entire nail row will not descend with it.

[0015] As can be seen, the present invention achieves the required automatic nailing action by setting a nail feeding protrusion on the firing pin and matching it with a nail feeding plate, a nail feeding rod, a nail feeding claw, etc., thus making reasonable use of the original reciprocating motion of the firing pin. The motion conversion is simple, the structure is compact, and there are few parts, so the reliability is high and the cost is economical.

[0016] Furthermore, an axially limiting safety spring is fitted onto the upper end of the nail feed rod to press the nail feed plate against the nail holder. This safety spring assists the return spring, making the descent and return of the nail feed plate, along with the nail feed plate itself, more reliable.

[0017] Furthermore, the upper part of the cover plate is hinged and can be opened and closed, while the lower part is equipped with an opening and closing pin that extends outwards and inserts into the corresponding positioning hole of the nail-driving seat due to the action of an elastic element. Therefore, the cover plate can be positioned at the nail-driving seat or lifted up for maintenance.

[0018] Furthermore, the nail-driving base has a central window, at which a nail-feeding claw with ratchet-shaped nail-feeding teeth is installed, forming a sliding pair with the central window. This sliding pair can assist in the guiding engagement between the nail-feeding rod and the through hole, making its lifting and floating more stable and reliable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure after the shell is removed in one embodiment of the present invention.

[0020] Figure 2 yes Figure 1 An exploded three-dimensional structural diagram of the upper nailing mechanism in the embodiment.

[0021] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of the nailing mechanism in the embodiment.

[0022] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the nail-feeding claw in the embodiment.

[0023] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the anti-screw claw in the embodiment.

[0024] Figure 6 yes Figure 1 A schematic diagram of the nail feeding claw in the nail feeding state of the nail feeding mechanism in the embodiment.

[0025] Figure 7 yes Figure 1 A schematic diagram of the retracted state of the nail feeding claw of the nailing mechanism in the embodiment.

[0026] Figure 8 yes Figure 1 A schematic diagram of the nail-stopping claw retracted in the embodiment.

[0027] Figure 9 yes Figure 1 A schematic diagram of the nail-stopping claw structure in the nail-stopping state of the nail-stopping mechanism in the embodiment.

[0028] Figure 10 yes Figure 1 A partial three-dimensional structural diagram of the cover plate being lifted before nailing in the embodiment.

[0029] Figure 11 yes Figure 1 A three-dimensional structural diagram of the nailing mechanism from another perspective before nailing, as shown in the embodiment.

[0030] Figure 12 yes Figure 1 A partial three-dimensional structural diagram of the cover plate being lifted after the nail is attached, as shown in the embodiment.

[0031] Figure 13 yes Figure 1 A three-dimensional structural diagram of the nailing mechanism from another perspective after nailing. Implementation

[0032] The basic structure of the fastener striking drive tool in this embodiment is as follows: Figure 1 As shown, the system includes an energy storage unit consisting of an air storage chamber 7 located inside the housing and a cylinder 6 supported on the frame 5; an impact unit consisting of a retractable striking head 1 and a striking switch 2 located at the front end of the housing nailing seat 14; a nail feeding unit consisting of a nail box 12 on one side of the nailing channel of the nailing seat 14 and a nail feeding mechanism 13; a nailing unit consisting of a striking pin 15 connected to the piston of the cylinder 6 and extending toward the nailing seat 14; and a lifting unit consisting of a motor 11 meshing with the striking pin 15 and a lifting wheel 3 driven by a gearbox 4. Figure 1 8 is the trigger switch located on the housing handle, 10 is the battery pack inserted into the lower part of the housing handle, and 9 is the control circuit board located on the battery pack.

[0033] The working principle of this embodiment is basically the same as that of the prior art: the nail feeding unit feeds the nails wound in the nail magazine one by one to the nailing channel at the nozzle. The lifting unit converts the power of the motor into the gas compression energy of the gas storage chamber of the energy storage unit through the piston movement. When the nozzle is pressed and triggers the contact switch, the trigger switch is operated to drive the firing pin of the nailing unit to shoot out the nails in the nailing channel and complete the required fastener hitting operation.

[0034] Its unique feature is the nail feeding mechanism 13 of the nail feeding unit. Figure 2 As shown, the nail feeding channel of the nail-driving base 14 and the firing pin 15 form a sliding pair, and the two pin lug holes 14.2 on one side of the base are hinged to a cover plate 13.1 that can be opened and closed via a pin 13-1. One end of the firing pin 15 has a nail feeding protrusion 15.1.

[0035] The lower part of the cover plate 13.1 is equipped with an opening / closing pin 13-2, whose end tends to extend and insert into the corresponding positioning hole 14.1 of the nail-driving seat 14 under the action of the opening / closing pin spring 13-3. Therefore, the cover plate 13.1 can be positioned in the nail-driving seat 14 when the end of the opening / closing pin 13-2 is inserted into the positioning hole 14.1, and can also be lifted when the end of the opening / closing pin 13-2 is dislodged from the positioning hole 14.1 for maintenance operations. The middle part of the cover plate 13.1 is hinged with a nail-stopping pawl 13.2 with elastic ratchet teeth at the upper end, so when the nail passes through the nail feeding channel of the nail-driving seat 14, it can only be fed in one direction and cannot be retracted.

[0036] The upper end of the nail-driving base 14 is fitted with a floating nail-feeding plate 13.4 via guide pins 14.3 on both sides. A nail-feeding rod 13.5, which passes through a through hole in the middle of the nail-feeding plate 13.4 and also passes through a through hole in the lower part of the nail-feeding base 14, is inserted into the nail-feeding plate 13.5. The nail-feeding rod 13.5 is equipped with a return spring 13-7 that tends to lower it. Because the return spring 13-7, together with the safety spring 13-4 limited by a retainer ring at the upper end of the nail-feeding rod 13.5, causes the nail-feeding plate 13.4 to press against the nail-feeding base 14. One end of the nail-feeding plate 13.4 has a nail-feeding ramp 13.4-1 that engages with the nail-feeding protrusion 15.1 of the firing pin 15. Therefore, when the firing pin 15 retracts after nailing, the nail-feeding protrusion 15.1 will act on the nail-feeding ramp 13.4-1, thereby driving the nail-feeding rod 13.5 to move upward. Then, under the action of the return spring 13-7, it will descend back to its original position.

[0037] A nail feeder 13.3 with ratchet-shaped nail-pulling teeth is installed at the central window of the nail-driving base 14. The nail feeder 13.3 is hinged to the middle of the nail feeder 13.5 via a pin 13-6, forming a sliding pair with the central window of the nail-driving base 14. The pin 13-6 is equipped with a torsion spring 13-5 that guides the nail-pulling teeth of the nail feeder 13.3 toward the nail feeding channel. When the nail feeder 13.3 moves upward, the nail-pulling teeth of the nail feeder 13.3, which extend into the nail spacing D, lift the row of nails upward, allowing the uppermost nail to enter the nail-driving channel.

[0038] The specific structure of this embodiment will be further described below with reference to other accompanying drawings.

[0039] like Figure 3 As shown, the pin feed protrusion 15.1 begins to act on the pin feed ramp 13.4-1, combined with... Figure 2 It can be seen that the pivot pin 13-6 of the hinged nail feeder 13.3 is located at the relief notch 13.5-1 in the middle of the nail feeder 13.5, thus making it compact and avoiding interference.

[0040] like Figure 4 As shown, the block-shaped nail feeder 13.3 has a vertical clearance groove 13.3-3 in the middle of the side adjacent to the nail. Two symmetrically spaced nail feeder rows 13.3-1 are arranged on both sides of the vertical clearance groove 13.3-3. Each nail feeder row 13.3-1 has two nail-pulling teeth 13.3-2 with an upper and lower bevel that are matched to the nail spacing. The nail-pulling teeth 13.3-2 are composed of a rounded upper surface and a lower bevel. A horizontal hinge hole 13.3-4 is provided on the side of the nail feeder 13.3 away from the nail.

[0041] like Figure 5 As shown, the lower part of the nail stop claw 13.2 is provided with a horizontal hinge hole 13.2-1, and the upper end is provided with three nail stop teeth 13.2-2 extending in the direction of nail D from the left, center and right. The nail stop teeth 13.2-2 are composed of an upper horizontal surface and a lower inclined surface, and are also ratchet-shaped.

[0042] When the nail feed rod 13.5 makes a lifting motion, such as Figure 6 As shown, the upper surface of the nail feed claw 13.3 and the nail-pulling tooth 13.3-2, inserted into the nail spacing D, will drive the nail pack to rise, completing the nail feeding action that allows the uppermost nail to enter the nailing channel. During this process, the nail stop claw 13.2 is in a position... Figure 8 The shown is the yielding state. Then, when the nail feed rod 13.5 performs its reset movement, as... Figure 7 As shown, the lower inclined surface of the pin-feeding tooth 13.3-2 will cause the pin-feeding claw 13.3 to swing and reposition around the rotating shaft 13-6 against the force of the torsion spring 13-5, and under the action of the elastic element, it will be in a state of... Figure 9 The pin stop pawl 13.2 in the indicated position ensures that the pins will not descend during the reset movement.

[0043] Combination Figures 10 to 13 This will help to better understand the aforementioned nailing process.

[0044] For electric nail guns that cannot use traditional high-pressure gas for nailing, this embodiment breaks away from the need for an additional motor-driven nail feeding mechanism. It utilizes the return motion of the original nailing mechanism to drive the nail feeding, thus organically combining the two. This not only avoids the layout design trouble and mechanism complexity of adding a motor-driven nail feeding mechanism, but also avoids the mutual adverse effects between the nailing and nail feeding mechanisms. The structure is compact and easy to assemble. In addition, the cooperation between the nail feeding and nail stopping mechanisms ensures stable and reliable nail feeding.

[0045] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A fastener striking drive tool, comprising: The energy storage unit consists of an air storage chamber and a cylinder located inside the casing; The striking unit consists of a retractable striking head at the front of the housing and a striking switch; its characteristic is: The nail feeding unit consists of a nail box and a nail feeding mechanism on one side of the nailing channel in the nailing seat. The nail-driving unit consists of a firing pin connected to a cylinder piston and extending toward the nail-driving seat, one end of which has a nail-feeding protrusion; The lifting unit consists of a motor-driven lifting wheel that meshes with the firing pin; The nail-driving base is equipped with a floating mechanism driven by the nail-feeding protrusion, and the floating mechanism is equipped with a nail-feeding claw that lifts the nail into the nail-feeding channel.

2. The fastener striking drive tool according to claim 1, characterized in that: A floating nail feed plate is mounted on the nail-driving base via a guide pin. The nail feed plate has a nail feed ramp that engages with the nail feed protrusion. The nail feed plate is inserted through a through hole in the lower part of the nail-driving base and simultaneously passes through a nail feed rod. The nail feed rod is equipped with a return spring that tends to lower the nail. The nail-driving base is equipped with a nail feed pawl with ratchet-shaped nail-pulling teeth that tend to the nail feed channel. The nail feed pawl is hinged to the nail feed rod.

3. The fastener striking drive tool according to claim 2, characterized in that: The nail-driving seat is equipped with a cover plate on one side, and the cover plate is hinged with a nail-stopping claw to restrict the one-way delivery of nails.

4. The fastener striking drive tool according to claim 2 or 3, characterized in that: The nail-driving base has a central window, and a nail-feeding claw with ratchet-shaped nail-feeding teeth is installed in the central window, forming a moving pair with the central window.

5. The fastener striking drive tool according to claim 4, characterized in that: The nail feeding claw hinge is equipped with a torsion spring that directs the nail-feeding teeth toward the nail feeding channel.

6. The fastener striking drive tool according to claim 5, characterized in that: The feeding claw has a vertical clearance groove in the middle of one side of the nail. The feeding rows are symmetrically arranged on both sides of the vertical clearance groove. The feeding rows are provided with nail-pulling teeth with an upper and lower spacing adapted to the nail spacing.

7. The fastener striking drive tool according to claim 6, characterized in that: The pin teeth are composed of a rounded upper plane and a lower bevel.

8. The fastener striking drive tool according to claim 7, characterized in that: The nail-feeding claw has a horizontal hinge hole on the side away from the nail.

9. The fastener striking drive tool according to claim 3, characterized in that: The lower part of the nail-stopping claw is provided with a horizontal hinge hole, and the upper end is provided with nail-stopping teeth extending in the direction of the nail.

10. The fastener striking drive tool according to claim 9, characterized in that: The stop teeth are composed of an upper horizontal surface and a lower inclined surface.

11. The fastener striking drive tool according to claim 4, characterized in that: An axial limiting safety spring is fitted at the upper end of the nail feeding rod to press the nail feeding plate against the nailing seat.

12. The fastener striking drive tool according to claim 3, characterized in that: The upper part of the cover plate is hinged and can be opened and closed, and the lower part is equipped with an opening and closing pin that tends to extend out and be inserted into the corresponding positioning hole of the nailing seat under the action of an elastic element.

13. The fastener striking drive tool according to claim 12, characterized in that: The cover plate is hinged in the middle with a nail-stopping claw with elastic ratchet at the upper end. When the nail passes through the nail feeding channel of the nail-driving seat, it can only be fed in one direction and cannot be reversed.

14. The fastener striking drive tool according to claim 4, characterized in that: The lifting wheel is driven by a motor through a gearbox.

15. The fastener striking drive tool according to claim 4, characterized in that: The nail feed rod has a clearance notch in the middle.

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