TWI430873B - Power clutch device for electric nail gun - Google Patents

Description

Electric nail gun power clutch device

The invention relates to the technical field of electric nail guns, in particular to a power clutch device for an electric nail gun.

The electric nail gun is an electric hand tool that generates the nailing power by driving the striker set with electric energy. Due to the striker set used to fire the nails on the nail gun, it is necessary to have a condition of extremely large linear nailing power instantaneously. The electric nail gun disclosed in the patents of USP5098004, EP1584418, EP1584419 and the like has disclosed the use of a flywheel to drive the striker. The group produces a nail-powered design.

Generally, the knowledger knows that the flywheel is driven to rotate and has the characteristic of accumulating rotational kinetic energy, and the striker set is disposed between the flywheel and a free roller (or pinch wheel) having displacement capability, and utilizes a swing arm mechanism. As a power clutch device, the free roller can be controlled to be swivelly displaced, thereby pushing the striker group so that the striker group can be pressed against the flywheel, and the rotational kinetic energy of the flywheel is accumulated instantaneously at the moment of pressure contact with each other. It is transmitted to the striker set, which drives the striker set to instantaneously output a great linear nailing power, and the nail pieces are smoothly fired one by one.

In addition, the USP7575141 patent discloses an electric nail gun different from the above design, which discloses that the free roller is changed to the positioning configuration, and is only used for guiding and supporting purposes as a linear nail displacement of the striker group, and simultaneously applied. The different swing arm mechanism is used as a power clutch device to control the displacement of the flywheel in rotation, thereby being able to press and drive the striker group to shift the nail.

It is worth mentioning that the above USP7575141 patent case can solve the USP5098004, EP1584418, EP1584419 and other cases in the striker group. When the roller is pushed to contact the flywheel, the problem of the axis of the nail is deviated. Especially after the sliding seat in the striker group is worn by multiple frictions, the problem of off-axis is more serious. However, in the above cases including the USP7575141 patent, the swing arm mechanism as the power clutch device pivotally positions the flywheel on the swing arm, and drives the swing arm to rotate toward the striker group to make the swing arm The striker group is squeezed by the free roller on both sides to transmit kinetic energy. In this way, the flywheel will be displaced in the direction of the striker group along with the swinging arc of the swing arm; and it is known that when the flywheel is displaced by the swinging arc diameter and the thrust pin group transmits the kinetic energy, the swing arm and the gun The body support is bound to withstand the strong bending moment of the free roller and the flywheel, and form the bending load on the swing arm. Therefore, the swing arm mechanism and the gun body bracket must be designed to be thick and thick, so as to withstand the test of durable use. However, it is also easy to take up too much space for the gun body and increase the weight.

In view of this, the present invention aims to solve the problem that the swing arm on the electric nail gun is easy to generate a bending load due to the bending moment acting during the kinetic energy of the flywheel transmitting the nail. In order to solve the problem, the present invention is to improve the design of the relative arrangement between the swing arm, the gun body bracket and the flywheel, and in particular, to eliminate the positioning of the flywheel on the swing arm in a pivotal manner, and to use the gun. The body bracket and the swing arm jointly constrain the relative arrangement of the flywheel to reduce the bending load that the swing arm bears during the transmission of the nail kinetic energy of the flywheel.

To this end, the present invention provides a power clutch device for a power nail gun, the technical means comprising: a gun body bracket, forming at least two symmetrical limit portions along a first direction, and an electromagnetic actuator is disposed on the gun body bracket; a striker group is slidably disposed at one end of the gun body bracket along a striking nail; a swing seat is pivoted in the gun body bracket, and is driven by the electromagnetic drive to swing, and the swing seat is formed at least two a stop portion symmetrically distributed in the second direction, the stop portion and the limit portion respectively form a set of symmetrical accommodation cavities; and a flywheel accumulating kinetic energy, the two sides of which are respectively coaxially pivoted a bearing, the bearing is respectively slidably disposed in the accommodating cavity and is restrained by the limiting portion and the stopping portion, and the electromagnetic driver drives the swinging seat to swing and push the through the stopping portion The bearing moves in the second direction such that the flywheel drives the striker set to transmit the nailing power along the nailing axis.

Furthermore, in the implementation of the present invention, the striker set is guided by a contact pulley and is slidably assembled in the axial direction of the nail. The positioning pulley is pivotally disposed at one end of the gun body bracket. The positioning pulley is located in the second direction.

The second direction is perpendicular to the first direction. The first direction is parallel to the nailing axis.

A first elastic element is disposed between the swing seat and the electromagnetic actuator to drive the swing seat to be reset.

The swinging seat is pivotally disposed in the gun body bracket through a shaft column, and the swinging seat and the gun body bracket are disposed with a second elastic element, and the second elastic element is pressed against the shaft column to make the swing seat The spring pressure is stored when the flywheel drives the striker set. The second elastic element has a plurality of undulating arc faces that are pressed against the shaft post when the swing seat is swung.

The swing seat is pivotally disposed in the gun body bracket through a shaft column, and the electromagnetic drive drives the swing seat swing by a force applying portion, and the stop portion is transmitted through the stop portion The bearing is pushed in the second direction by a contact point.

The electromagnetic drive is fixed to the gun body bracket to drive the swing seat. The flywheel is driven by an electric motor to accumulate kinetic energy, and the electric motor is positioned on the gun body bracket.

In the above technical means of the present invention, since the electromagnetic actuator drives the swinging seat to swing, the bearing can be linearly displaced in the second direction, thereby restraining the flywheel from moving in the second direction, and the striker group is disposed in the first direction. Therefore, the flywheel can be driven to press and drive the striker group to axially displace along the nail and fire the nail. The accommodating cavity formed by the stopping portion and the limiting portion restrains the trajectory of the flywheel movement, and when the flywheel drives the striker set, the contact outer portion and the limiting portion are contacted through the outer wall of the bearing. Disperses the load, thus reducing the large stress caused by the pendulum arm subjected to bending loads.

The above content and the subsequent embodiments and the drawings are briefly described in order to further explain the technical means and the effects that can be produced by the present invention to solve the problem. Relevant details regarding the implementation of the present invention will also be set forth in the detailed description and drawings.

In the present specification, the relative positions, displacements, and directions of the forces of the members are indicated by the dashed arrows in the drawings.

Please refer to Figure 1 to Figure 3. 1 is a perspective view showing the power clutch device of the electric nail gun of the present invention, FIG. 2 is a perspective exploded view showing the structure of FIG. 1, and FIG. 3 is a cross-sectional view showing the power clutch device of the present invention. The gun body bracket 1, a striker group 2, a swing seat 3 and a flywheel 4 for accumulating kinetic energy; wherein: the gun body bracket 1 is substantially configured for the striker set 2 and the swing seat in the nail gun 3, and the fixed bracket of the flywheel 4 and other components, can be regarded as the fixed end of the gun body. The gun body bracket 1 forms at least two symmetric limiting portions 11 along a first direction Y, and an electromagnetic actuator 33 is disposed on the gun body bracket 1.

The striker set 2 is seated in the first direction Y and slides at one end of the gun body bracket 1 along a nail axial direction Y1. More specifically, the striker set 2 is a contact guide that receives a positioning pulley 12 and slides in the nail axial direction Y1. The positioning pulley 12 is pivotally disposed at one end of the gun body bracket 1 by a pivot shaft 13 and the positioning pulley 12 is located in a second direction X. Wherein, the second direction X may be perpendicular to the first direction Y, and the first direction Y may be parallel to the nailing axis Y1.

The striker set 2 includes a fixed seat 21, two guide posts 22, a slide 23, two elastic ring rings 24 and a striker 25, and the aforementioned nail axial direction Y1 refers to the axial direction of the striker 25 moving the push pins downward. The fixing base 21 is fixed to one end of the gun body bracket 1 , and the two guiding columns 22 are respectively fixed in parallel to one end of the fixing base 21 , and the sliding seat 23 receives the guiding of the guiding column 22 and slides into a group. The nail is axially Y1, and the end surface of the sliding seat 23 adjacent to the flywheel 4 is formed with a concave and convex groove 26, and the two elastic ring 24 is sleeved between the sliding seat 23 and the fixing seat 21 to drive the sliding. The seat 23 can be slidably displaced and reset in the nail axial direction Y1 by the negative load spring pressing method, and the striker 25 is fixed to the slide seat 23. More specifically, the striker set 2 receives the contact guide of the positioning pulley 12 by the slide 23, and slides the set in the nail axial direction Y1. The striker 25 is fixed to the slide 23 along the nail axial direction Y1, so that the striker 25 can slide along the nail axial direction Y1 to push the nail in the firing nail gun.

The swinging seat 3 is driven by the electromagnetic actuator 33 and is rotated toward the nailing axis Y1. Wherein, the electromagnetic driver 33 can be substantially an electromagnetic Iron, which receives the power on the electric nail gun, and outputs the driving force from a shaft. The shaft member of the electromagnetic actuator 33 is coupled to the swinging seat 3, and is capable of driving the swinging seat 3 to approach the nailing axial direction Y1.

The swinging seat 3 is pivotally disposed in the gun body bracket 1 through a shaft post 32, and a first elastic member 34 is disposed between the swinging seat 3 and the electromagnetic actuator 33 to drive the swinging seat 3 to be reset. The first elastic element 34 can be a spiral compression spring. The other end of the first elastic element 34 is urged to the electromagnetic actuator 33. Thus, when the electromagnetic actuator 33 is energized, the swing seat 3 can be pulled to carry the negative spring. Moving in the second direction X, the electromagnetic actuator 33 can be retracted by the first elastic member 34 when the electromagnetic actuator 33 is deenergized.

Please refer to Figure 3 and Figure 4 together. 4 is a partial perspective view of FIG. 1 for explaining that a second elastic member 35 is disposed between the swing seat 3 and the gun body support 1 , and the second elastic member 35 is pressed against the shaft post 32 to make the swing seat 3 on the flywheel 4 . When the striker group 2 is driven, the spring pressure is stored; in a further implementation, the second elastic member 35 may be a leaf spring made of a sheet metal member, and the double-end member body may form a wave plate for storing the spring pressure. body. More specifically, the striker set 2 is provided with a recess 26 for the instantaneous engagement of the flywheel 4, and when the unevenness is generated due to wear caused by the permanent use, the second elastic member 35 having the spring pressure is stored. The swinging seat 3 can be driven to continuously drive the flywheel 4 to maintain the state of the press-fit slot 26, which includes the moment when the flywheel 4 transmits kinetic energy to the recessed groove 26, whether during static friction, maximum static friction or even frictional friction. The flywheel 4 can retain the spring pressure through the second elastic member 35, and always maintains the pressure-contacting recess 26 to sufficiently transmit the nail without being affected by the micro-uneven pits.

Swinging the seat 3 and forming at least two symmetry and distributed in the second direction X The stop portion 31, the stop portion 31 and the limiting portion 11 respectively form a set of symmetrical accommodating cavities 90, so as to drive the accommodating cavity 90 enough to slide a bearing 42 having a true outer wall contour. The bearings 42 are respectively slidably disposed in the accommodating cavity 90 and are linearly displaced by the restraining and guiding action of the limiting portion 11 and the stopping portion 31. For the convenience of the following description, the limiting portion 11 may include a first limiting portion 11a and a second limiting portion 11b. The first limiting portion 11a and the second limiting portion 11b are respectively formed along the second direction. X constitutes a plane of a particular width to constrain the bearing 42 to produce a linear displacement in the second direction X. The stopping portion 31 can include a first stopping portion 31a and a second stopping portion 31b. The first stopping portion 31a pushes the bearing 42 when the swinging seat 3 is swung toward the nailing axis Y1. The bearing 42 is linearly displaced in the second direction X to be close to the nailing axis Y1; the second stopping portion 31b is to push the bearing 42 when the swinging seat 3 is swung away toward the nailing axis Y1, so that the bearing 42 is along the second The opposite direction of the direction X (-X) is linearly displaced away from the nailing axis Y1.

Wherein, a recess 31e is formed between the first stopping portion 31a and the second stopping portion 31b, and the first stopping portion 31a provides a contact point 31d distributed in a line shape, and the bearing 42 is pushed in the second direction X. The linear displacement is close to the nailing axis Y1. During this displacement, since the bearing 42 is simultaneously restrained by the sliding of the first limiting portion 11a and the second limiting portion 11b in the second direction X, the position of the contact point 31d is made. The slight movement of the first stopper portion 31a is changed in accordance with the swing path of the stopper portion 31, so that the recess portion 31e can prevent the swing seat 3 from interfering with the movement of the bearing 42. More specifically, the recess 31e can be arcuately shaped to approximate or conform to the contour of the bearing 42 while avoiding interference with the bearing 42.

As can be seen from FIG. 1 to FIG. 4, the wheel surface of the flywheel 4 is formed corresponding to The concave-shaped wheel groove 48 in the form of the groove 26 of the sliding seat 23, the wheel center of the flywheel 4 is provided with a shaft member 41 for coaxially arranging the bearing 42 on both sides of the flywheel 4 so as to facilitate the circle of the bearing 42 The outer wall slides in the accommodating cavity 90; in addition, a driven pulley 43 is fixed at one end of the shaft member 41, and an electric motor 44 is fixed on the gun body 1 and an active shaft is fixed on the shaft of the electric motor 44. A pulley 46, a belt 46 is disposed between the driving pulley 45 and the driven pulley 43, and the belt 46 receives the tension of a resilient pressing wheel 47 on the gun body bracket 1 to drive the belt 46 to maintain a specific tension for preventing slippage. The power of the electric motor 44 is transmitted to the flywheel 4, and the electric motor 44 is driven to rotate the flywheel 4 to accumulate its rotational kinetic energy.

When the electromagnetic actuator 33 is not energized, the swinging seat 3 is reset by the driving of the first elastic member 34, thereby causing the flywheel 4 that is rotating and accumulating kinetic energy, and the wheel groove 48 can be engaged with the groove 26 on the sliding seat 23. There is a margin T (shown in Figure 5) that is spaced apart from each other, at which time the flywheel 4 is idling without transmitting rotational kinetic energy to the carriage 23.

Please refer to Figure 5 and Figure 6. FIG. 5 is a cross-sectional view showing the state of the striker group before the displacement of the striker of FIG. 1. FIG. 6 is a cross-sectional view showing the state of the striker of the striker of FIG. When the electromagnetic actuator 33 is energized and energized by the power source, when the swinging seat 3 is biased by the elastic force of the first elastic member 34, the shaft of the electromagnetic actuator 33 drives the swinging seat 3 to swing and is pushed through the stopper 31. The bearing 42 moves linearly along the second direction X, so that the flywheel 4 drives the striker set 2 to transmit the nailing power along the nailing axis Y1; more specifically, the circular outer wall of the bearing 42 is in point contact manner, and Contact with the contact point provided on the limiting portion 11 and the stopper portion 31, and the bearing 42 is pushed by the stopper portion 31, and the same When it is restrained by the limiting portion 11, it is linearly displaced toward the second direction X. Thus, the bearing 42 and the flywheel 4 can be driven to move linearly in the second direction X, so that the flywheel 4 that is rotating and accumulates kinetic energy can have the wheel groove 48 In engagement with the groove 26 on the carriage 23, the second elastic member 35 can be pressed against the shaft post 32 of the swinging seat 3, and the flywheel 4 is contacted by the engaging groove 26 during the pressing contact with the engaging groove 26. When the unevenness of the surface causes the side of the swinging seat 3 to move in the opposite direction (-X) in the second direction X, a relatively stable thrust can be provided. More specifically, the second elastic member 35 can drive the flywheel 4 to more stably press the slider 23, so that the flywheel 4 is used to drive the carriage 23 to transmit the nailing power toward the nailing axis Y1, thereby causing the striker 25 to follow the nail. The axial Y1 fires the nail. When the nail is hit, the electromagnetic actuator 33 is deenergized, and the swing seat 3 is driven to be pushed by the first elastic member 34 to be reset.

Referring to FIG. 7, an illustration of the swinging seat structure of FIG. 5 is disclosed to illustrate the force arm relationship of the swinging seat. The electromagnetic actuator 33 drives the upper force applying portion 31c of the swinging seat 3 to swing the swinging seat 3, and the bearing 42 is linearly moved in the second direction X through a contact point 31d provided by the first stopping portion 31a. Meanwhile, since the contact point 31d to the shaft center 32a is formed with the first force arm line A1, the urging portion 31c to the shaft center 32a is formed with the second force arm line A2, whereby the electromagnetic actuator 33 applies a force F2. The urging portion 31c generates a torque through the second force arm line A2 to drive the swing seat 3 to swing, and the contact point 31d based on the first force arm line A1 is a tangent to a circle formed along the center of the shaft column 32a. The direction of the swing motion generates another force F1, and the contact point 31d is simultaneously moved in the X direction due to the outer shape relationship of the first stopper portion 31a, so that the force F1 generates an amplifying force Fx1 in the X direction. So as to push the bearing 42 to move linearly along the second direction X; thus, The thrust transmitted to the flywheel 4 by the electromagnetic actuator 33 can be amplified, and the thrust outputted by the contact point 31d can be formed only in the second direction X, thereby effectively reducing or even eliminating the bending load that the swing seat 3 can withstand.

As described above, the present invention discloses that the stopper portion 11 serves as a trajectory for restricting the movement of the flywheel 4, and distributes the load so as to penetrate the stopper portion 31 and the stopper portion 11 through the outer wall of the bearing 42, thereby not only the electromagnetic actuator 33 but also the electromagnetic actuator 33. In addition to the amplification of the thrust transmitted to the flywheel 4, the load of the large stress caused by the swinging seat 3 subjected to the bending load can be effectively reduced, thereby contributing to the lightweight design of the durable structure of the gun body.

The point contacts and contact points mentioned in the above description of the present invention are in a two-dimensional plane. If stated in a three-dimensional space, the point contact should be changed to a line contact, and the contact point should be changed to a contact line.

The above embodiments are merely illustrative of preferred embodiments of the invention, but are not to be construed as limiting the scope of the invention. It should be noted that various modifications and improvements may be made without departing from the spirit and scope of the invention. Therefore, the present invention should be based on the content of the claims defined in the scope of the patent application.

1‧‧‧ gun body bracket

11‧‧‧Limited

11a‧‧‧First Limitation

11b‧‧‧First Limitation

12‧‧‧ Positioning pulley

13‧‧‧ pivot

2‧‧‧ striker group

21‧‧‧ Fixed seat

22‧‧‧ Guide column

23‧‧‧Slide

24‧‧‧Flexible ring

25‧‧‧Scill

26‧‧‧Inlay

3‧‧‧Swing

31‧‧‧stop

31a‧‧‧First stop

31b‧‧‧First stop

31c‧‧‧ Force Department

31d‧‧‧Contact points

31e‧‧‧ recess

32‧‧‧ shaft column

32a‧‧‧Axis Center

33‧‧‧Electromagnetic drive

34‧‧‧First elastic element

35‧‧‧Second elastic element

4‧‧‧Flywheel

41‧‧‧ shaft parts

42‧‧‧ bearing

43‧‧‧ driven pulley

44‧‧‧Electric motor

45‧‧‧Proactive pulley

46‧‧‧Land

47‧‧‧Elastic pressure roller

48‧‧‧ wheel slots

T‧‧‧Yudu

Y‧‧‧First direction

X‧‧‧second direction

Y1‧‧‧nail axis

A1‧‧‧First force arm line

A2‧‧‧Second arm line

F1, F2‧‧‧ force

Fx1‧‧‧Magnification

90‧‧‧容容

1 is a perspective view of the power clutch device of the electric nail gun of the present invention; FIG. 2 is an exploded perspective view of FIG. 1; FIG. 3 is a cross-sectional view of FIG. The second elastic member is disposed; FIG. 5 is a cross-sectional view showing the state before the shift of the striker group of FIG. 1; Figure 6 is a cross-sectional view showing the state in which the striker set of the striker of Figure 1 is displaced; Figure 7 is a cross-sectional view of the swinging seat structure of Figure 5, illustrating the force arm relationship of the swinging seat.

1‧‧‧ gun body bracket

12‧‧‧ Positioning pulley

2‧‧‧ striker group

21‧‧‧ Fixed seat

22‧‧‧ Guide column

23‧‧‧Slide

24‧‧‧Flexible ring

25‧‧‧Scill

26‧‧‧Inlay

3‧‧‧Swing

33‧‧‧Electromagnetic drive

4‧‧‧Flywheel

43‧‧‧ driven pulley

44‧‧‧Electric motor

45‧‧‧Proactive pulley

46‧‧‧Land

47‧‧‧Elastic pressure roller

Claims (10)

The utility model relates to a power clutch device for an electric nail gun, comprising: a gun body bracket, forming at least two symmetrical limiting portions along a first direction, an electromagnetic driver is arranged on the gun body bracket; and a striker group is arranged along a nail shaft a sliding group is disposed at one end of the gun body bracket; a swinging seat is pivoted in the gun body bracket, and is driven to rotate by the driving of the electromagnetic driver, and the swinging seat is formed at least two symmetrically and distributed in the second direction a stop portion, the stop portion and the limiting portion respectively form a set of symmetrical receiving cavities; and a flywheel accumulating kinetic energy, the two sides of which respectively coaxially pivot a bearing, the bearings respectively slide group Restricted by the limiting portion and the stopping portion in the accommodating cavity, the electromagnetic actuator drives the swinging seat to swing and guide the bearing to move in the second direction through the stopping portion, so that The flywheel drives the striker set to transmit the nailing power along the nail axis. The power clutch device of the electric nail gun according to the first aspect of the invention, wherein the striker group receives a contact guide of a positioning pulley and slides in the axial direction of the nail, the positioning pulley is pivoted on the One end of the gun body bracket. The power clutch device for an electric nail gun according to claim 2, wherein the positioning pulley is located in the second direction. The power clutch device for an electric nail gun according to claim 1, wherein the second direction is perpendicular to the first direction. A power clutch device for an electric nail gun as claimed in claim 4, wherein the first direction is parallel to the nailing axis. The power clutch device of the electric nail gun according to the first aspect of the invention, wherein the first spring is disposed between the swing seat and the electromagnetic drive The swinging seat is reset by the sexual component. The power clutch device of the electric nail gun according to the first aspect of the invention, wherein the swing seat is pivotally disposed in the gun body bracket through a shaft column, and the swing seat is disposed between the gun body and the gun body bracket. And a second elastic element pressed against the shaft column to store the swing seat when the flywheel drives the striker set. The power clutch device of the electric nail gun according to claim 7, wherein the second elastic member has a plurality of undulating curved surfaces, and the curved surface is pressed against the shaft column when the swinging seat is swung. . The power clutch device of the electric nail gun according to the first aspect of the invention, wherein the swing seat is pivotally disposed in the gun body bracket through a shaft column, and the electromagnetic drive drives the swing seat swing with a force applying portion. And moving the bearing in the second direction by a contact point through a contact point. The power clutch device for an electric nail gun according to claim 1, wherein the flywheel is driven by an electric motor to accumulate kinetic energy, and the electric motor is positioned on the gun body bracket.