TWI404604B - Power clutch device for electric nail gun - Google Patents

Abstract

This invention provides a power clutch device of an electric nail gun, including a set of symmetric straight stroke holes formed on a gun body frame. A firing pin group is slidably configured at one end of the gun body frame, and a guide seat is movably arranged in the gun body frame. A set of symmetric oblique stroke holes are formed on the guide seat. The walls of the oblique stroke holes and the straight stroke holes are encircled to form a communicating through hole with bearings respectively slidably configured therein. A flywheel is coaxially arranged between the bearings for accumulating kinetic energy. An electromagnetic actuator is used to drive the guide seat to move in order to force the through hole to constrain the bearings and make the flywheel to move, thereby pressing and actuating the firing pin group to transmit nail striking power along the nail striking axis.

Description

Electric nail gun power clutch device

The present invention relates to an electric nail gun, and more particularly to a power clutch device for driving a striker set by a flywheel.

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 swivel-type displacement, thereby pushing the striker group so that the striker group can be pressed against the flywheel, and the rotational kinetic energy of the flywheel accumulation can be quickly formed at the moment of pressure contact with each other. The transmission to the striker set 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-mentioned USP7575141 patent case can solve the problem that the USP5098004, EP1584418, EP1584419 and the like deviate from the nail axis when the striker group is pushed by the free roller to contact the flywheel, especially in the striker group. After wear, the problem of off-axis is more serious. However, in the above-mentioned cases including the USP7575141 patent, as the swing arm mechanism of the power clutch device, the swing arm and the gun body are in the process of absorbing the kinetic energy by the free roller and the flywheel on both sides of the striker group. The bracket can still be removed without having to withstand the strong bending moment exerted by the free roller or the flywheel, and the bending load on the swing arm is formed, which leads to the design of the swing arm mechanism and the thick and sturdy degree of the gun body bracket, and must be able 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.

The invention aims to provide a power clutch device for an electric nail gun, in particular to eliminate the setting of the swing arm mechanism in the prior art, and to solve the problem that a bending moment is applied to the swing arm and the gun body bracket during the flywheel driving striker group. The problem with the load. The technical means for solving the problem of the present invention comprises: a set of symmetrical straight stroke holes formed on a gun body bracket extending in a first direction; a striker group, along a hammer axis in the first direction The sliding direction is at one end of the gun body bracket, and the first direction is excluded from the axial direction of the nail; a guiding seat is disposed in the gun body bracket and is driven by an electromagnetic drive to move in a second direction The second direction is excluded from being parallel to the first direction; a set of symmetrical oblique stroke holes are formed on the guiding seat and extending in a third direction, the third direction being located in the first direction and the second direction Between the oblique stroke hole and the hole wall of the straight stroke hole, and forming a through hole communicating with each other; and a flywheel accumulating kinetic energy, a bearing is coaxially disposed on both sides thereof, and the bearing is simultaneously slided in the through hole When the guiding seat moves in the second direction, the through hole restrains the bearing and causes the flywheel to synchronously move in the first direction, thereby driving the striker group to transmit the nailing power in the axial direction of the nail.

Furthermore, in the above technical means of the present invention, the striker set is a contact guide that receives a positioning pulley and slides 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 first direction, adjacent to the striker group and adjacent to the straight stroke hole.

The second direction is perpendicular to the first direction. The second direction is parallel to the nailing axis. The third direction is at an angle of between 15 degrees and 30 degrees from the second direction.

A first elastic element is disposed between the guiding seat and the gun body bracket, and is driven to be reset after being moved in the second direction.

A second elastic member is disposed in the opposite direction of the first direction of the gun body holder to protect the guide seat to maintain a stable pressure contact of the flywheel and drive the striker set.

The electromagnetic drive is fixed to the gun body bracket to drive the guide seat. The flywheel is driven to rotate by an electric motor that is positioned on the gun body bracket.

In the above technical means of the present invention, the through hole can be moved in the first direction when the electromagnetic drive drive guide is moved in the second direction, and the flywheel synchronization is restricted to move in the first direction, and the first direction is arranged. There is a striker set, so that the flywheel can be driven to press and drive the striker set to axially displace along the staple and fire the nail. In this way, there is no swing arm, but the straight stroke hole is used as the through hole to restrain the movement of the flywheel, and the hole wall of the oblique stroke hole and the straight stroke hole is used as the flywheel to drive the striker group through the outer wall of the bearing. The point of contact with the wall of the hole is used to disperse the load, so that during the process in which the striker group is squeezed by the positioning roller and the flywheel transmits kinetic energy, the guide seat is subjected to a pressure load and the gun body support is subjected to a tensile load, so Effectively eliminates the large stress caused by 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.

The direction referred to in the present specification is a directional characteristic including a relative position, a displacement, and a force of a related element by a vector, and will be indicated by a broken line in an arrow in a later-described pattern.

Please refer to Figure 1 and 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 in the implementation, including a gun body bracket 1, a striker group 2, a guide seat 3 and a flywheel 4; wherein: the gun body bracket 1 is substantially configured in the nail gun for the striker set 2, the guide seat 3 and the flywheel 4 The fixed bracket can be regarded as the fixed end of the gun body.

Referring to FIG. 4 and FIG. 5, it is illustrated that the gun body bracket 1 is formed with a set of symmetrical straight stroke holes 11 which are represented by a plane vector of the X-axis and the Y-axis coordinates, and the straight stroke hole 11 is along a The first direction X is stretched and formed on the gun body bracket 1.

Please refer to FIG. 5 and FIG. 6 to illustrate that the striker set 2 is located in the first direction X and is slidably disposed at one end of the gun body bracket 1 along a nail axial direction Y1. The first direction X is excluded. It is parallel to the nailing axis Y1; in practice, the first direction X may be perpendicular to the nailing axis Y1. More specifically, the gun body bracket 1 is pivotally provided with a positioning pulley 12 by a pivot 18, and the striker group 2 is guided by the contact guide 12 and slides on the nailing axis Y1; The positioning pulley 12 may also be located in the first direction X and spaced apart from the striker group 2 adjacent to the straight stroke hole 11.

As can be seen from FIG. 2, 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. As shown in FIG. 1 and FIG. 6 , 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. The guide 22 of the column 22 slides on the nailing axis Y1, and the end surface of the sliding block 23 adjacent to the flywheel 4 is formed with a concave and convex groove 26, and the two elastic ring 24 is sleeved on the sliding Between the seat 23 and the fixed seat 21, the slide 23 can be driven to be slidably displaced in the nail axial direction Y1 and reset in a negatively loaded spring manner. 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 on the slide 23 along the nail axial direction Y1, thereby driving the striker 25 to slide on the gun body bracket 1 along the nail axial direction Y1, so as to facilitate the push of the nail gun. Nail pieces.

As can be seen from FIG. 3 and FIG. 5, the guiding seat 3 is movably disposed in the gun body bracket 1 along a second direction Y. The electromagnetic body is fixed on the gun body bracket 1 in the second direction Y. 31. The electromagnetic actuator 31 may be an electromagnet that is activated by a power source on the electric nail gun and outputs a driving force by a shaft member. The shaft member of the electromagnetic actuator 31 is coupled to the guide seat 3 and is capable of driving the guide seat 3 to move in the second direction Y.

As can be seen from FIG. 2, FIG. 3 and FIG. 5, a set of symmetrical end walls 30 are formed on the guide seat 3, and a first elastic member 32 and a first portion are disposed between the guide seat 3 and the gun body bracket 1. Second elastic element 34. The first elastic member 32 can be a spiral compression spring. The guide seat 3 is formed with a guide seat 33 for arranging one end of the first elastic member 32 in the second direction Y. The other end portion of the first elastic member 32 is urged on a positioning end portion 13 in the gun body bracket 1; thereby, the electromagnetic actuator 31 is driven to drive the guide seat 3 to carry the negative spring force along the energization excitation. The second direction Y moves, and the guide seat 3 can be reset when the electromagnetic actuator 31 is deenergized. The second elastic member 34 is disposed at a position opposite to the first direction in the gun body in a negatively loaded spring manner, and holds the guide seat 3; in practice, the second elastic member 34 can be made a "skull" plate spring having a double end portion 34a and a middle portion of the blocking portion 34b formed thereon; the blocking portion 34b is slidably contacted with a positioning end portion 14 in the gun body bracket 1, the rod portion 34a is a contact with a positioning rib 15 in the gun body bracket 1 (shown in FIG. 5a) to drive the second elastic member 34 to be biased on the positioning end of the gun body bracket 1 by the negative spring force. Between the portion 14 and the positioning rib 15 and on the side surface 30a of the end wall 30 of the guiding seat 3, so as to pre-store a restraining force to protect the guiding seat in the opposite direction (-X) of the first direction X 3.

As can be seen from FIG. 4, the second direction Y is excluded from being parallel to the first direction X. In practice, the second direction Y may be perpendicular to the first direction X and intersect to form an intersection point O, and the second direction Y may also be parallel to the nailing axis Y1.

As can be seen from FIG. 2 and FIG. 5, the end wall 30 of the guide seat 3 is formed with oblique stroke holes 35 which are symmetrical with each other. More specifically, as shown in FIG. 4 and FIG. 5, the oblique stroke hole 35 is extended along a third direction XY, which is located between the first direction X and the second direction Y. And intersecting at the intersection point O, in practice, the third direction XY and the second direction Y may be between 15 degrees and 30 degrees. Thereby, between the oblique stroke hole 35 and the hole wall of the straight stroke hole 11, the through hole 90 (shown in FIG. 6a) which communicates with each other can be formed. More specifically, as shown in FIG. 6b, the through hole 90 is formed by the hole wall 35a of the oblique stroke hole 35 and the hole wall 11a of the straight stroke hole 11, so as to drive the through hole 90 enough to slide. a bearing 42 having a true outer wall contour such that the center of the bearing 42 is positioned at the intersection point O; the bearing 42 is capable of accepting the restraining and guiding action of the oblique stroke hole 35 and the straight stroke hole 11 to produce linearity Displacement (detailed later).

As can be seen from FIG. 1 to FIG. 3, the wheel surface of the flywheel 4 is formed with a concave-shaped wheel groove 48 corresponding to the shape of the groove 26 of the sliding seat 23. The wheel center of the flywheel 4 is provided with a shaft member 41 for The bearing 42 is disposed coaxially on both sides of the flywheel 4 to facilitate the sliding of the circular outer wall of the bearing 42 into the through hole 90. In addition, a driven pulley 43 is fixed to one end of the shaft 41. An electric motor 44 is fixed on the bracket 1 , and a driving pulley 45 is fixed on the shaft of the electric motor 44 . A belt 46 is disposed between the driving pulley 45 and the driven pulley 43 . The belt 46 receives the gun body. The tension of a resilient pressure roller 47 on the bracket 1 drives the belt 46 to maintain a specific tension to prevent slipping, and transmits the power of the electric motor 44 to the flywheel 4, thereby driving the electric motor 44 to drive the flywheel 4 to rotate and accumulate Rotational kinetic energy.

As can be seen from FIG. 6 and FIG. 6b, when the electromagnetic actuator 31 is not energized, the guiding seat 3 is stretched by the first elastic member 32 and slides into a bottom position S1 to drive the bearing 42 to be inclined. Between the right upper inclined hole section A1 of the stroke hole 35 and the right straight hole section B1 of the straight stroke hole 11, the flywheel 4 which is in the middle of the rotation and accumulates the kinetic energy, and the wheel groove 48 thereof and the slider 23 can be A margin T is provided between the slots 26, and the flywheel 4 is idling without transmitting rotational kinetic energy to the carriage 23.

As can be seen from FIG. 7 and FIG. 7a, when the user activates the power supply on the electric nail gun to energize the electromagnetic actuator 31, the guide seat 3 is subjected to electromagnetic force under the elastic force of the first elastic member 32. The shaft member on the driver 31 is driven to move in the second direction Y, thereby shifting to a top position S2, and a specific stroke S is maintained between the top position S2 and the bottom position S1 to drive the bearing 42 to be restrained by the through hole 90. The flywheel 4 is moved in the first direction X; more specifically, the circular outer wall of the bearing 42 is in point contact with the straight stroke hole 11 and the hole walls 11a, 35a of the oblique stroke hole 35. In contact, and the bearing 42 is pushed by the hole wall 35a of the oblique stroke hole 35 to be displaced by the specific stroke S, and is simultaneously restrained by the hole wall 11a of the straight stroke hole 11, and is inclined toward the left lower slope of the oblique stroke hole 35. The hole section A2 is displaced from the left straight hole section B2 of the straight stroke hole 11; thus, the bearing 42 and the flywheel 4 can be driven to move in the first direction X (ie, the direction of the carriage 23), so that the rotation and the kinetic energy are accumulated. The flywheel 4, the wheel groove 48 can be in pressure contact with the slot 26 on the sliding seat 23; The second elastic member 34 can hold the guide seat 3 in the opposite direction (-X) of the first direction X, preventing the flywheel 4 from being pressed into the engaging recess 26, due to the unevenness of the contact surface of the recessed groove 26. The guide seat 3 is laterally displaced in the opposite direction (-X) of the first direction X. More specifically, the second elastic member 34 can drive the flywheel 4 to more stably press against 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 be The nail member is fired along the nail axial direction Y1 (as shown in Fig. 8). After the nail is pushed, the electromagnetic actuator 31 is deenergized to drive the guide seat 3 to be pushed by the first elastic member 32 to return to the bottom position S1 (as shown in FIG. 6).

The orientation descriptions of "upper right", "lower left", "right side", and "left side" in the above description are in the directions shown in the drawings of the present invention.

As apparent from the above description, the present invention uses the straight stroke hole 11 as a trajectory for restricting the movement of the flywheel 4, and uses the oblique stroke hole 35 and the hole walls 35a, 11a of the straight stroke hole 11 as the flywheel 4 to drive the striker group 2 The load is dispersed through the outer wall of the bearing 42 to contact the hole walls 35a, 11a to maintain the endurance service life, and the thick and sturdy swing arm and the gun body bracket can be eliminated, thereby facilitating the reduction of the electric nail gun. Volume and weight, and effectively eliminate the persecution of bending loads.

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 bracket

11. . . Straight stroke hole

11a, 35a. . . hole wall

12. . . Positioning pulley

13, 14. . . Positioning end

15. . . Positioning rib

18. . . Pivot

2. . . Strike needle set

twenty one. . . Fixed seat

twenty two. . . Guide column

twenty three. . . Slide

twenty four. . . Elastic ring

25. . . firing pin

26. . . Insert slot

3. . . Guide seat

30. . . End wall

30a. . . side

31. . . Electromagnetic drive

32. . . First elastic element

33. . . Guide seat

34. . . Second elastic element

34a. . . Rod

34b. . . Stop

35. . . Oblique stroke hole

4. . . flywheel

41. . . Shaft

42. . . Bearing

43. . . Driven pulley

44. . . electric motor

45. . . Active pulley

46. . . Belt

47. . . Elastic pressure roller

48. . . Wheel slot

A1. . . Right upper oblique hole section

B1. . . Right straight section

A2. . . Left lower oblique hole section

B2. . . Left straight section

T. . . Margin

S. . . Specific trip

S1. . . Bottom position

S2. . . Top position

X. . . First direction

Y. . . Second direction

XY. . . Third direction

Y1. . . Nail axis

O. . . Intersection

90. . . Through hole

Figure 1 is a perspective view of a preferred embodiment of the present invention;

Figure 2 is an exploded perspective view of the structure shown in Figure 1;

Figure 3 is a cross-sectional view of the structure shown in Figure 1;

Figure 4 is a front elevational view of the gun body bracket of Figure 1;

Figure 5 is a cross-sectional view of Figure 3 illustrating the placement of the guide seat 3 and its associated components within the gun body support;

Figure 5a is a partial perspective view of Figure 5 illustrating the placement of a second resilient member within the gun body holder;

Figure 6 is a cross-sectional view showing the state of the flywheel kinetic energy detachment striker set of Figure 1;

Figure 6a is an explanatory view of the position of the through hole shown in Figure 6;

Figure 6b is an explanatory view of the bearing position shown in Figure 6;

Figure 7 is a cross-sectional view showing the state of the flywheel kinetic energy driving striker set of Figure 1;

Figure 7a is an explanatory view of the bearing position shown in Figure 7;

Figure 8 is a cross-sectional view showing the state in which the striker set of the striker of Figure 1 is displaced.

1. . . Gun bracket

12. . . Positioning pulley

2. . . Strike needle set

twenty one. . . Fixed seat

twenty two. . . Guide column

twenty three. . . Slide

twenty four. . . Elastic ring

25. . . firing pin

26. . . Insert slot

3. . . Guide seat

31. . . Electromagnetic drive

4. . . flywheel

43. . . Driven pulley

44. . . electric motor

45. . . Active pulley

46. . . Belt

47. . . Elastic pressure roller

48. . . Wheel slot

Claims (10)

The utility model relates to a power clutch device for an electric nail gun, comprising: a set of symmetrical straight stroke holes formed on a gun body bracket and extending in a first direction; a striker group, along a hammer shaft in the first direction The sliding direction is at one end of the gun body bracket, and the first direction is excluded from the axial direction of the nail; a guiding seat is disposed in the gun body bracket and is driven by an electromagnetic drive to move in a second direction The second direction is excluded from being parallel to the first direction; a set of symmetrical oblique stroke holes are formed on the guiding seat and extending in a third direction, the third direction being located in the first direction and the second direction Between the oblique stroke hole and the hole wall of the straight stroke hole, and forming a through hole communicating with each other; and a flywheel accumulating kinetic energy, a bearing is coaxially disposed on both sides thereof, and the bearing is simultaneously slided in the through hole When the guiding seat moves in the second direction, the through hole restrains the bearing and causes the flywheel to synchronously move in the first direction, thereby driving the striker group to transmit the nailing power in the axial direction of the nail. The power clutch device of the electric nail gun according to claim 1, wherein the striker group receives the contact guide of a positioning pulley and slides in the axial direction of the nail, and the positioning pulley is pivoted to the gun body. One end of the bracket. The power clutch device for an electric nail gun according to claim 2, wherein the positioning pulley is located in the first direction and is spaced apart from the straight stroke hole by the striker group. A power clutch device for an electric nail gun as claimed in claim 1, 2 or 3, wherein the second direction is perpendicular to the first direction. A power clutch device for an electric nail gun as described in claim 1, 2 or 3, wherein the second direction is parallel to the nailing axis. The power clutch device for an electric nail gun as described in claim 1, 2 or 3, wherein the third direction and the second direction are at an angle of 15 degrees to 30 degrees. The power clutch device of the electric nail gun according to claim 1, wherein a first elastic member is disposed between the guide seat and the gun body bracket, and the guide seat is driven to be reset after being moved in the second direction. The power clutch device of the electric nail gun according to claim 1, wherein a second elastic member is disposed in the opposite direction of the first direction of the gun body bracket to protect the guide seat. The power clutch device for an electric nail gun according to claim 1, wherein the electromagnetic actuator is fixed to the gun body bracket to drive the guide seat. The power clutch device of the electric nail gun according to claim 1, wherein the flywheel is driven to rotate by an electric motor, and the electric motor is positioned on the gun body bracket.