RU2775020C1 - Driving fasteners tool - Google Patents

Abstract

FIELD: driving fasteners tool.

SUBSTANCE: invention relates to a tool for driving fasteners. The tool contains an energy storage mechanism (2), containing a cylinder (2-2) and a piston (2-1) in the housing (1), a clogging means (4), moreover, the piston (2-1) is connected to the clogging means (4), made with the possibility of passing into the nozzle (3) of the tool, the handle (5) with a battery pack located on one side of the cylinder (2-2), the drum (6) for nails located on one side of the nozzle (3) of the tool, and the lifting mechanism (7), located between the handle (5) and the drum (6) for nails, while the lifting mechanism (7) contains a driving means (4) having engagement teeth distributed at intervals along the length of the driving means, and a drive wheel (9) having engagement cylinders , distributed at intervals over a predetermined length, and the drive wheel is in gear connection with an electric motor (8), wherein the battery pack is configured to supply power to the electric motor (8). Moreover, the drive wheel (9) is equipped with gear shift fingers (9-3), which are made radially extending from opposite sides of the drive wheel (9) to a predetermined length, while the side surface of the driving means (4), located opposite the engagement teeth, is equipped with a retractable convex pin (4-1), made with the possibility of engagement with the fingers (9-3) of gear shifting, wherein the gearshift fingers (9-3) are made with the possibility, before the engagement cylinder enters the lifting engagement with the engagement teeth, to move to the engagement position and shift the gear in front of the retractable convex pin (4-1), moreover, the engagement cylinder is configured to lift the engagement with engagement teeth, and the shift fingers (9-3) are made with the possibility of transition to displace the retractable convex pin (4-1) to ensure that the engagement teeth are placed in the engagement position with the engagement cylinder.

EFFECT: providing a tool having a simple structure and effectively preventing interference between the engagement of the drive wheel and the engagement of the driving means at the time of re-lifting.

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Description

FIELD OF TECHNOLOGY

[0001] The present invention relates to tools for driving fasteners and, in particular, to an electric gas spring nail gun, which belongs to the field of electrical tools.

BACKGROUND OF THE INVENTION

[0002] According to the Applicant, tools for attaching one object to another using nail fasteners for a long time were mainly activated by air, including high pressure gas, gas combustion and so on, which is not only expensive, but also poses potential security risks. Thus, in recent years, an electric gas spring-loaded nail gun has appeared, a typical design of which is presented in US patents US8011441 and US8267296. This type of nail gun uses an electric motor to drive a toothless safety drive wheel, thereby lifting a driving tool engaged with the drive wheel, and to store energy by compressing the air in the cylinder by means of a piston. Then, when the drive wheel reaches the gearless safety condition and disengages from the driver, the compressed air allows the piston to actuate the driver released by the drive wheel to rapidly move to complete the nailing action. After that, the drive wheel goes back into the lift and engage state to start the next nailing cycle. Due to the fact that the energy comes from the power supply, the electric gas spring nail gun has good performance and is safe.

[0003] However, in the course of practical application, when a nail jam occurs intermittently in this type of nail gun due to some reason, as shown in FIG. 6, since the driving means is locked and does not move to the normal end position indicated by the dotted dotted line, the teeth of the drive wheel may interfere with the driving means when re-raised and engaged, that is, they are blocked and cannot enter the engagement state; at this point in time, not only damage to the transmission element may occur due to the blockage of the electric motor, but also due to the fact that the air inside the cylinder is still under some pressure, once the blockage is removed, the blocking means will go out of control, leading to a threat security. Thus, the above patent also provides a ratchet locking structure to prevent the driver from getting out of control; however, this design makes the elements and assembly more difficult.

DISCLOSURE OF THE INVENTION

[0004] In view of the above disadvantages in the prior art, it is an object of the present invention to provide a fastener driving tool having a simple structure and capable of preventing nail jamming for convenience and safety of operation.

[0005] In order to achieve the above object, the basic technical scheme of the fastener driving tool according to the present invention is as follows. The fastener driving tool comprises: an energy storage mechanism consisting of a cylinder and a piston in a housing, the piston being connected to the driving agent extending into the gun nozzle, a handle with a battery pack provided on one side of the cylinder, a nail drum provided on one side of the gun nozzle, and a lifting mechanism provided between the handle and the nail drum;

[0006] The lifting mechanism comprises a driving means having engagement teeth distributed at intervals in length, and a drive wheel having engagement cylinders distributed at intervals over a predetermined arc length, and the drive wheel is in transmission connection with an electric motor, to which the battery the unit supplies power;

[0007] from opposite sides of the drive wheel, the shift fingers extend radially to a predetermined arc length; and the side surface of the clogging means, opposite the teeth of the engagement, is provided with a retractable convex pin, made with the possibility of engagement with the gear shift fingers; before the engagement cylinder engages in lifting engagement with the engagement teeth, the shift fingers move to the engagement and shift position in front of the retractable convex pin; and when the engagement cylinder is in upward engagement with the engagement teeth, the shift pins move to displace the retractable convex pin to place the engagement teeth in the engagement position with the engagement cylinder.

[0008] Thus, there is no need for a locking mechanism, and the structure is simple; moreover, when the engagement cylinder is in lifting engagement with the engagement teeth, the shift pins have actually displaced the retractable convex pin, which effectively prevents interference between the driving wheel and the driver during re-raising.

[0009] To further improve the present invention, the drive wheel includes two symmetrical wheel parts, and the engagement cylinders are supported between the two symmetrical wheel parts.

[0010] To further improve the present invention, the shift pins extend radially from opposite sides of the two symmetrical wheel portions by a predetermined arc length, respectively, and the two side surfaces of the driving means opposite the engagement teeth are provided with a retractable convex pin configured to enter into engagement with the gear shift pin, respectively.

[0011] To further improve the present invention, the shift pin is provided with a single lift curve flange that forms a cam pair with a retractable bulge pin.

[0012] To further improve the present invention, the two ends of the single flange of the lift curve are provided with a transition arc, respectively.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is described below in more detail in conjunction with the drawings.

[0014] FIG. 1 is a perspective view of Embodiment 1 of the present invention.

[0015] FIG. 2 is a sectional view of the embodiment shown in FIG. one.

[0016] FIG. 3 is a perspective view of the lifting mechanism in the embodiment shown in FIG. one.

[0017] FIG. 4 is a diagram of the initial engagement position of the hoist shown in FIG. 3.

[0018] FIG. 5 is a diagram of the end position of the engagement of the hoist shown in FIG. 3.

[0019] FIG. 6 is a diagram of an engagement interference present in the prior art.

DETAILED DESCRIPTION

[0020] Embodiment 1

[0021] The basic design of the fastener driving tool provided in the present embodiment is as shown in FIG. 1 and FIG. 2, at the rear end of the sleeve 1, an energy storage mechanism 2 is provided, consisting of a cylinder 2-2 and a piston 2-1, the piston 2-1 being rigidly connected to the clogging means 4 extending into the nozzle 3 of the gun. On the lower side of the cylinder 2-2, a handle 5 is provided having a battery pack 5-1, on the lower side of the nozzle 3 of the gun, a nail drum 6 is provided for accommodating the nail clip, and on the upper part, between the handle 5 and the nail drum 6, lifting mechanism 7, at the bottom between the handle 5 and the nail drum 6, an electric motor 8 and a retarding gear 8-1 are provided.

[0022] As shown in FIG. 3, the lifting mechanism 7 comprises a driving means 4 having engagement teeth distributed at intervals along its length and a drive wheel 9 engaging with the driving means 4; wherein the drive wheel 9 is composed of two symmetrical wheel parts 9-1 and engagement cylinders 9-2 supported between the two symmetrical wheel parts and spaced at intervals of a predetermined arc length; wherein the driving wheel 9 is in transmission connection with the electric motor 8, to which the battery pack 5-1 supplies power.

[0023] From the opposite sides of the two symmetrical wheel parts of the drive wheel 9, the shift fingers 9-3 radially extend to a predetermined arc length, respectively, and the two side surfaces of the driving means 4 opposite the engagement teeth are provided with a cylindrical retractable convex pin 4-1, configured to engage with the gearshift pin 9-3, respectively. The symmetrical wheel parts in the present embodiment not only change the suspended engagement cylinders provided in the prior art to a double-ended support structure, but also form a symmetrical engagement structure between the shift pin 9-3 and the retractable convex pin 4-1 based on this. two sides, hence the lifting force is higher and the transmission is more stable. The shift finger 9-3 is provided with a single lifting curve flange C which forms a cam pair with a retractable convex pin 4-1; wherein the two ends of the single flange C of the lifting curve are provided with a transition arc, respectively, to ensure a stable and reliable lifting movement.

[0024] During operation, as shown in FIG. 4, before the engagement cylinder 9-2 enters the lifting engagement with the engagement teeth, the shift pins 9-3 move to the engagement and shift position in front of the retractable convex pin 4-1; however, even when the driving means deviates from its original position due to nail jamming and other reasons, the shift pin 9-3 can also perform a blocking function at the beginning of engagement with the retractable convex pin 4-1, thereby effectively preventing the uncontrolled action of the driving means, and providing security; then, by gearing, the driving means is displaced to place the engagement cylinder 9-2 in the position of normal engagement with the engagement teeth, that is, when the engagement cylinder 9-2 is in upward engagement with the engagement teeth, the shift pins 9-3 shift to displacement of the retractable convex pin 4-1 to ensure that the engagement teeth are placed in the engagement position with the engagement cylinder, thereby preventing the nail from getting stuck, as shown in FIG. 6. Then, as the drive wheel continues to rotate, the engagement cylinder 9-2 is in lifting engagement with the engagement teeth until the disengagement position shown in FIG. 5 and the driving agent will be abruptly released to eject the nail.

[0025] Experience has shown that regardless of whether the driving means deviates from its original position due to nail jamming and other reasons or not, the shift fingers moved to the engagement and shift position in front of the retractable convex pin before the engagement cylinder entered into lifting engagement with the engagement teeth, even with residual pressurized air in the cylinder, and it is also unlikely that control of the driver will be lost by the shift pin, moreover, when the engagement cylinder is in lift engagement with the engagement teeth, the shift fingers have effectively dislodged the retractable convex pin, which not only raises, but also causes the retractable convex pin to move to ensure that the engagement teeth are placed in the engagement position with the engagement cylinder, thereby ensuring accurate engagement, as well as effectively preventing interference with engagement between the drive forest and blocking agent during re-lifting.

[0026] In addition to the above implementation options, other changes can also be made to the present invention. For example, during the drive wheel rotation process, in order to pressurize the convex pin on the driver only by force along the driving direction of the driver, the shift pin may also be flanged with other lifting curves. Any technical scheme that uses equivalent substitutions or equivalent transformations will fall within the protection scope of the present invention.

Claims (5)

1. A tool for driving a fastener, comprising an energy storage mechanism, containing a cylinder and a piston in a housing, a driving means, the piston being connected to a driving means configured to pass into the nozzle of the tool, a handle with a battery pack located on one side of the cylinder, a drum for nails, located on one side of the nozzle of the tool, and a lifting mechanism located between the handle and the nail drum, while the lifting mechanism includes a driving means having engagement teeth distributed at intervals along the length of the driving means, and a drive wheel having engagement cylinders, distributed at intervals of a predetermined length, and the drive wheel is in transmission connection with the electric motor, while the battery pack is configured to supply power to the electric motor, characterized in that the drive wheel is provided with gear shift fingers, which rye are made radially protruding from opposite sides of the drive wheel to a predetermined length, while the side surface of the driving means, located opposite the teeth of the engagement, is equipped with a retractable convex pin, made with the possibility of engaging with the gear shift fingers, while the gear shift fingers are made with the possibility , prior to the engagement cylinder engaging in lifting engagement with the engagement teeth, moving to the engagement position and shifting in front of the retractable convex pin, wherein the engagement cylinder is configured to lift engagement with the engagement teeth, and the shift fingers are configured to transition to displace the retractable convex pin for ensuring that the engagement teeth are positioned in engagement with the engagement cylinder. 2. The tool according to claim 1, characterized in that the drive wheel comprises two symmetrical wheel parts, and the engagement cylinders are located between the two symmetrical wheel parts. 3. The tool according to claim 2, characterized in that the gearshift fingers are made radially protruding from opposite sides of the two symmetrical wheel parts to a predetermined length, and the two side surfaces of the clogging means opposite the engagement teeth are provided with the specified retractable convex pin, made cylindrical and with the possibility of engaging with the gear shift finger. 4. The tool according to claim 3, characterized in that the gearshift pin is made with a universal flange having a profile, the shape of which is configured to form a cam pair with a retractable convex pin. 5. Tool according to claim 4, characterized in that the two ends of the universal flange are connected by an arc.

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