WO2015169168A1

WO2015169168A1 - Electromagnetic nail gun

Info

Publication number: WO2015169168A1
Application number: PCT/CN2015/077834
Authority: WO
Inventors: 冯泽舟; 范悦; 廖志文
Original assignee: 北京大风时代科技有限责任公司
Priority date: 2014-05-05
Filing date: 2015-04-29
Publication date: 2015-11-12
Also published as: CN105082061A

Abstract

An electromagnetic nail gun comprising a lever (10), a lever driving apparatus, a slider apparatus, and a resetting apparatus. The lever driving apparatus is capable of causing the lever (10) to pivot. The resetting apparatus is capable of resetting the lever (10) when the electromagnetic nail gun completes a nailing. The slider apparatus comprises a slide (18), a slider (19), a roller (30), and a roller shaft (31). The roller shaft (31) is mounted on the slider (19). The axis of the roller shaft (31) is perpendicular to the plane of rotation of the lever (10) and intersects the central axis of the slider (19). The roller (30) is pivotally mounted on the roller shaft (31). A first extremity part (101) of the lever (10) is extended into the slide (18) and is abutted against the outer circumferential surface of the roller (30) during a nailing process to push the slider (19) to move along the slide (18). In this way, a point of force application on the slider is always located at the center of the slider, and no rotational torque is generated, thus preventing the slider from being caught in the slide.

Description

Electromagnetic nail gun

Technical field

The present invention relates to the field of nail guns, and in particular to an electromagnetic nail gun.

Background technique

Electromagnetic nail gun is a new type of nail gun. Compared with the previous pneumatic nail gun, electromagnetic nail gun has the advantages of fast nailing speed and high energy utilization, so it is widely used in construction, decoration, furniture manufacturing and other fields.

The invention patent publication CN101301745A discloses a high-speed electromagnetic nail gun with a lever, which comprises a magnet, a core, a lever, and a striker slider. The iron core is connected with the lever, and the upper end of the lever is connected with the striker slider. When nailing, the magnet attracts the iron core, the iron core drives the lever to move, and the upper end of the lever drives the striker slider to move. In the above electromagnetic nail gun, a roller is mounted on the upper end of the lever, and the roller is slidably fitted in the striker slider. During the nailing process, the roller slides up and down in the striker slider, and the friction between the two is large, which affects the nailing effect. In addition, since the force point of the striker slider moves up and down, deviating from the center of the striker slider, the lateral force of the striker slider is large, and the wear of the striker slider and the slide is large.

Summary of the invention

It is an object of the present invention to provide an electromagnetic nail gun that has a better nailing effect.

In order to achieve the above object, the present invention provides an electromagnetic nail gun including a lever, a lever driving device, a slider device and a reset device, the lever driving device capable of driving the lever to rotate, the reset device being capable of the electromagnetic nail Resetting the lever after the nail is completed once, wherein the slider device comprises a slide, a slider, a roller and a roller shaft, the slider is disposed in the slide, and the roller shaft is mounted on On the slider, and the axis of the roller shaft is perpendicular to a plane of rotation of the lever and intersects a central axis of the slider, the roller being pivotally mounted on the roller shaft, A first end of the lever extends into the slide and abuts against an outer peripheral surface of the roller during nailing to urge the slider to move along the slide.

Preferably, the bottom of the slideway is provided with a through groove extending along the length of the slide.

Preferably, the slider has a hollow portion, the roller is located in the hollow portion, and the first end portion extends through the through groove to enter the hollow portion.

Preferably, a fixed position shaft is further disposed on the slider, and the first end portion abuts on the limiting shaft during the lever resetting process.

Preferably, the first end is located between the roller shaft and the limit shaft.

Preferably, the lever driving device includes an electromagnet and a driving iron core, the driving iron core is coupled to the lever and is reciprocally movable in a predetermined direction to drive the lever, and the electromagnet is used to drive the driving iron The core moves.

Preferably, the resetting device includes a spring that is capable of biasing the lever to reset the lever, the maximum amount of expansion of the spring being less than the stroke of the drive core.

Preferably, the ratio of the maximum amount of expansion and contraction of the spring to the stroke of the drive core is less than 1:2.

Preferably, the lever driving device further includes a connecting rod, and two ends of the connecting rod are respectively hinged with the driving iron core and the lever.

Preferably, the lever includes a second end, the slider is located at the first end, the resetting device is located at the second end, and a fulcrum of the lever is located at the first end and Between the second ends, the hinge point of the connecting rod and the lever is located between the first end and the fulcrum.

By arranging the roller shaft to be perpendicular to the plane of rotation of the lever and intersecting the central axis of the slider, the force point of the slider is always at the center of the slider during the nailing process, so that no The slider has a rotating torque of the turning tendency, thereby avoiding the situation that the slider is stuck in the slide, reducing the friction between the slider and the slide, and further improving the nailing effect.

Other features and advantages of the invention will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing:

1 is a schematic structural view of an electromagnetic nail gun according to a first embodiment of the present invention;

2 is a schematic structural view of an electromagnetic nail gun according to a second embodiment of the present invention;

Figure 3 is a schematic structural view of the slider device of Figure 1;

Figure 4 is a schematic structural view of the slider device of Figure 2;

Figure 5 is a schematic structural view of a lever driving device of an electromagnetic nail gun of the present invention;

Figure 6 is a schematic view showing the structure of a resetting device for an electromagnetic nail gun of the present invention.

Description of the reference numerals

10 lever 101 first end 102 second end

11 drive core 12 magnetic boot 13 electromagnetic coil

14 coil bobbin 351 through hole 15 limiter

16 Shock Absorber 17 Connecting Rod 18 Slide

181 through slot 19 slider 191 hollow

20 housing 21 handle 22 micro switch

23 Trigger 24 Strike Needle 25 Muzzle Nail Clip Assembly

26 Ball 27 Piston 28 Spring

29 spring sleeve 30 roller 31 roller shaft

32 Limit shaft 33 Connecting rod 35 Magnetic sleeve

352 Limits

detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that The specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

In the present invention, the orientation words such as "left and right" are generally used to refer to the left and right as shown in the drawings, and the "inside and outside" refer to the outline of each component. Inside and outside; "height direction" refers to the up and down direction of the electromagnetic nail gun under normal use.

As shown in FIG. 1 and FIG. 2, the electromagnetic nail gun provided by the present invention mainly comprises a housing 20, a lever 10, a lever driving device, a slider device, a striker 24, a reset device and a muzzle nail clamp assembly 25, and a lever driving device. In the movement of the driving lever 10, the lever 10 is used to drive the slider 19 in the slider device to be moved, the striker 24 is coupled to the slider 19 for impacting the nail in the muzzle nail holder assembly 25, and the resetting device is used for The electromagnetic nail gun resets each component after completing one nailing.

The electromagnetic nail gun of the present invention is described in three parts below.

First, the lever drive device

Referring to FIGS. 1 and 5, the lever driving device may include a driving core 11 reciprocally movable in a predetermined direction L, an electromagnet for driving the driving of the driving core 11, and a limit for limiting the electromagnet. In the predetermined direction L, the limiting member 15 is on a side of the electromagnet facing away from the driving core 11, when the driving iron core 11 collides with the electromagnet, The electromagnet can move together with the driving core 11 toward the limiting member 15, the driving iron core 11 is connected to the lever 10 to drive the lever 10, the electromagnet and the limiting member A shock absorbing member 16 is disposed between the two.

When the electromagnet is energized, the electromagnet generates a magnetic force to attract the driving iron core 11 to move toward the electromagnet, and the driving iron core 11 hits the electromagnet, and drives the electromagnet to continue moving toward the limiting member 15 until the electromagnet hits the limit position. On the 15th.

In the electromagnetic nail gun of the present invention, by providing the damper member 16 between the electromagnet and the limiting member 15, the impact between the electromagnet and the driving core 11 can be effectively buffered, and the driving core 11 and the electromagnet are prevented from being The impact force is too large and plastic deformation occurs, which reduces the vibration of the electromagnetic nail gun, enhances the stability and reliability of the electromagnetic nail gun, and prolongs its service life.

Preferably, a surface of the electromagnet facing the limiting member 15 or a surface of the limiting member 15 facing the electromagnet is formed with a groove, and the shock absorbing member 16 can face the electromagnet The recess 15 gradually fills the groove during the movement of the stopper 15. It should be noted here that in the original state (ie, the non-working state), the length of the damper member 16 in the predetermined direction L is greater than the depth of the groove, and can be gradually filled in the nailing process of the electromagnetic nail gun. Said groove. During each nailing process, electromagnetic attraction is generated between the electromagnet and the driving iron core 11. When the driving iron core 11 collides with the electromagnet, the electromagnet moves toward the limiting member 15, and the shock absorbing member 16 is elastically deformed, thereby generating The cushioning effect, the shock absorbing member 16 gradually fills the space in the groove during the elastic deformation until the groove is filled. At this time, the shock absorbing member 16 becomes a rigid body formed between the limiting member 15 and the electromagnet, and the limit is The distance between the piece 15 and the electromagnet is fixed, thereby ensuring a certain amount of displacement of the electromagnet and the driving core, and ensuring the consistency of the nailing depth.

Preferably, the groove is formed on a surface of the electromagnet facing the stopper 15. The damper member 16 may be disposed at a position corresponding to the recess of the limiting member 15, that is, the damper member 16 and the recess are respectively formed on different members. The damper member 16 may also be disposed in the recess and protrude from the recess, that is, the damper member 16 and the recess are formed on the same member, in which case the outer peripheral surface of the damper member 16 A gap is formed in advance with the inner peripheral wall of the groove.

It is to be understood that the electromagnet may have various appropriate structures as long as it can attract the driving core 11 to move the driving core 11 in the predetermined direction L. For example, the electromagnet may include an E-shaped iron core and an electromagnetic coil wound on the E-shaped iron core, and the iron may be driven by additionally providing a guide rail extending in a predetermined direction L and fixing the electromagnet to the guide rail. The core 11 is movably disposed on the guide rail, so that the drive core 11 can be moved in a predetermined direction L.

As a preferred embodiment, the electromagnet may include an electromagnetic coil 13, a bobbin 14, a magnetic shoe 12, and a magnetic sleeve 35. The electromagnetic coil 13 is wound around the bobbin 14, and the magnetic sleeve 35 is formed. The sleeve structure is fixed to the housing 20, and the bobbin 14 is coaxially embedded with the magnetic sleeve 35 on the inner peripheral wall of the magnetic sleeve 35. The limiting member 15 is disposed at one end of the magnetic sleeve 35 and is driven. The iron core 11 is movably disposed at the other end of the magnetic conductive sleeve 35, and the magnetic shoe 12 is disposed in the magnetic

conductive sleeve

35 and 351 is located between the limiting member 15 and the driving core 11 in a predetermined direction L.

In this embodiment, a groove may be formed on the surface of the magnetic shoe 12 facing the limiting member 15, and the damper member 16 is disposed in the groove and protrudes from the groove. Here, the magnetically permeable sleeve 35 is used to form a closed magnetic circuit. Specifically, the magnetic field formed by the energization of the electromagnetic coil 13 is conducted through the air between the magnetic shoe 12 and the driving core 11 to form a closed magnetic circuit. Since the magnetic resistance by the air is large, a magnetic force is generated between the magnetic shoe 12 and the driving core 11, and the driving core 11 is attracted to move in the direction of reducing the magnetic resistance, that is, moving toward the magnetic shoe 12, and finally driving. The iron core 11 is in contact with the magnetic shoe 12 to form a closed magnetic circuit between the magnetic shoe 12, the magnetic conductive sleeve 35 and the drive core 11.

Preferably, as shown in FIG. 5, the magnetic sleeve 35 is provided with a limiting portion 352 to restrict the magnetic shoe 12 from moving toward the driving core 11 in the predetermined direction L. Specifically, the magnetic shoe 12 and the magnetic conductive sleeve 35 directly form a stop fit, thereby ensuring that the magnetic shoe 12 does not move toward the drive core 11 after the electromagnetic coil 13 is energized.

In this embodiment, the extending direction of the through hole 351 of the magnetic conductive sleeve 35 coincides with the predetermined direction L. The "predetermined direction L" mentioned herein may be any direction in the plane of the movement of the lever, and preferably, the predetermined direction L may be perpendicular to the height direction H.

The driving core 11 and the lever 10 may be connected by a connecting rod 17, and both ends of the connecting rod 17 are hinged to the driving core 11 and the lever 10, respectively.

The shock absorbing member 16 can be made of any suitable material, such as urethane rubber.

In order to facilitate the entry of air between the driving core 11 and the magnetic shoe 12 to prevent the movement of the driving core 11 from being affected, preferably, the magnetic shoe 12, the damper member 16, and the limiting member 15 are respectively formed with each other. The communicating

air holes

122, 162, 152 are such that the space between the driving core 11 and the magnetic shoe 12 communicates with the outside air. As another preferred embodiment, the electromagnetic nail gun of the present invention further includes an air guiding tube penetrating the magnetic shoe 12, the damper member 16, and the limiting member 15 to make the space between the driving core 11 and the magnetic shoe 12 and the outside. Air communication.

Second, the slider device and lever

The electromagnetic nail gun of the present invention can be divided into a lever toggle type and a link drive type according to different slider driving modes.

(1) Lever-operated

Referring to Figures 1 and 3, in this form of electromagnetic nail gun, the slider assembly includes a slide 18, a slider 19 disposed within the slide 18, and a roller 30 and roller shaft 31 mounted on the slider 19. The lever 10 is configured to move the slider 19 along the slide 18, the axis of the roller shaft 31 being perpendicular to a plane of rotation of the lever 10 and intersecting a central axis of the slider 19, A roller 30 is pivotally mounted on the roller shaft 31, the first end 101 extending into the slide 18 and abutting against an outer peripheral surface of the roller 30 during nailing to push the The slider 19 moves.

In the present invention, the first end 101 of the lever 10 pushes the slider 19 to move and the toggle roller 30 to rotate, that is, the present invention reduces the friction between the lever 10 and the slider 19 by using the rolling pair. The force reduces the wear of the slider 19 and the slide 18 and improves the nailing effect.

It is more technically advantageous that the axis of the roller shaft 31 is perpendicular to the plane of rotation of the lever 10 and intersects the central axis of the slider 19, and the roller 30 is pivotally mounted on the roller shaft 31.

It is to be understood from the above technical solution that by arranging the roller shaft 31 to be perpendicular to the plane of rotation of the lever 10 and intersecting the central axis of the slider 19, the slider 19 is subjected to the nailing process. The force point is always at the center of the slider 19 so that a rotational moment that causes the slider 19 to have a tendency to rotate is not generated, thereby avoiding the occurrence of the slider 19 being stuck in the slide 18, reducing the slider 19 and the slide 18 The friction between them further improves the nailing effect.

Since the roller is disposed on the slider, the nailing effect (e.g., nailing force, nailing speed, etc.) can be controlled by changing the contour of the first end portion 101 of the lever.

The bottom of the slide 18 may have a through slot 181 extending along the length of the slide 18 for the first end 101 of the lever 10 to operate therein.

The slider 19 can have various suitable structures. As a preferred embodiment, the slider 19 may include a hollow portion 191 that allows movement of the lever 10, the roller shaft 31 extending through the hollow portion 191, the roller 30 being located within the hollow portion 191, the first end portion 101 extending through The through groove 181 enters the hollow portion 191.

Preferably, the slider 19 is further provided with a limit shaft 32 extending through the hollow portion 191. During the resetting of the lever 10, the first end portion 101 is abutted at the limit On the bit axis 32. More specifically, the first end portion 101 is located between the roller shaft 31 and the limit shaft 32. Here, by providing the limit shaft 32, it is possible to facilitate the lever 10 to push the slider 19 to reset during the resetting process. Of course, it is not necessary to provide the limiting shaft 32, so that the lever 10 directly abuts against the inside of the slider body during the resetting process.

(2) Link drive type

Referring to Figures 2 and 4, in this form of electromagnetic nail gun, the slider 19 and the lever 10 are connected by a connecting rod 33, the two ends of which are respectively associated with the slider 19 and the first end of the lever 10 The portion 101 is hinged, and the hinge point G of the link 33 and the slider 19 is located on the central axis of the slider 19.

In the present invention, the use of a link-driven electromagnetic nail gun has a low structural requirement for the slider, and thus can significantly reduce the production cost.

It is more technically advantageous that the hinge point G of the link 33 and the slider 19 is located on the central axis of the slider 19.

It is to be understood from the above technical solution that the force of the slider 19 during the nailing process is set by arranging the hinge point G of the link 33 and the slider 19 on the central axis of the slider 19. The point is always at the center of the slider 19 so that no rotational torque is generated which causes the slider 19 to have a tendency to rotate, thereby avoiding the occurrence of the slider 19 being stuck in the slide 18, reducing the slider 19 and the slide 18 The friction between the two further improves the nailing effect.

The bottom of the slide 18 may have a through groove 181 extending along the length of the slide 18 for the lever 10 and the link 33 to operate therein.

Third, the reset device and lever

Referring to FIGS. 1 and 2, the resetting device includes a spring 28 that is capable of biasing the lever 10 to reset the lever 10, and the maximum amount of expansion and contraction of the spring 28 is smaller than the driving core 11 Itinerary. Here, the "maximum amount of expansion and contraction" refers to the maximum amount of expansion and contraction of the spring 28 during operation, and when the driving core 28 is moved to the extreme position, the spring 28 is in the state of the maximum amount of expansion and contraction.

It should be noted here that during the nailing process, the spring of the reset device will be compressed or stretched, and the center of mass of the spring will also move. When the movement speed of the spring centroid is large, more energy in the driving energy generated by the driving iron core 11 is converted into the kinetic energy of the spring, which affects the nailing effect. In the electromagnetic nail gun of the present invention, the maximum amount of expansion and contraction of the spring 28 is smaller than the stroke of the driving core 11, in such a manner that the moving speed of the center of mass of the spring 28 is lower, and the kinetic energy of the spring is smaller, that is, during the nailing process. Only a small portion of the driving energy generated by the driving core 11 is converted into the kinetic energy of the spring 28, and the energy utilization rate is high, and the nailing effect is good.

Preferably, the ratio of the maximum amount of expansion and contraction of the spring 28 to the stroke of the drive core 11 is less than 1:2 to further reduce the kinetic energy of the spring 28.

The reset device, the slider device, and the connecting rod 17 can have any suitable positional relationship. As a preferred embodiment, the slider 19 is located at the first end 101 of the lever 10, the resetting device is located at the second end 102 of the lever 10, and the fulcrum P of the lever 10 is located Between the first end portion 101 and the second end portion 102, the hinge point R of the connecting rod 17 and the lever 10 is located between the first end portion 101 and the fulcrum P.

The reset device can have various suitable forms. According to a preferred embodiment of the present invention, as shown in FIG. 6, the resetting device further includes a ball 26, a piston 27 and a spring sleeve 29 having an open end, the spring 28 being disposed in the spring sleeve 29, the piston 27 Provided at the open end of the spring sleeve 29, the piston 27 is formed with a receiving cavity, and the ball 26 is disposed in the receiving cavity and abuts against the lever 10.

In addition to the components mentioned above, the electromagnetic nail gun of the present invention may further include a handle 21, a micro switch 22 and a trigger 23 formed as part of the housing 20, and the handle 21 is provided for opening A micro switch 22 for closing the power source of the electromagnet, the trigger 23 is used to activate the micro switch 22, and the trigger 23 is partially exposed to the housing 20.

The following is a brief description of the operation of an electromagnetic nail gun in accordance with a preferred embodiment of the present invention.

In use, the handle 21 is held by hand, the power is turned on, the trigger 23 is triggered to trigger the micro switch 22 to turn on the power of the electromagnetic coil 13, and the electromagnetic coil 13 causes the magnetic shoe 12 to generate a magnetic force to drive the iron core 11 to the left. Quickly sucking in, the driving iron core 11 drives the lever 10 through the connecting rod 17, and the first end portion 101 of the lever 10 accelerates to drive the slider 19 and causes the front end of the striker 24 to impact the type in the muzzle nail holder assembly 25 forward. The staples are driven into the fixture to be secured; at the same time, the second end 102 of the lever 10 pushes the ball 26 to compress the spring 28 between the closed end of the spring sleeve 29 and the piston 27. When the trigger 23 is released, the micro switch 22 turns off the power of the electromagnetic coil 13, and the driving iron core 11 loses the suction force, and sequentially runs to the right under the action of the extension of the spring 28 and drives the lever 10, the driving iron core 11 and the slider 19 to be reset. , complete the reset.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the embodiments described above, and various modifications may be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims

An electromagnetic nail gun comprising a lever (10), a lever driving device, a slider device and a reset device, the lever driving device being capable of driving the rotation of the lever (10), the reset device being capable of being completed at the electromagnetic nail gun Resetting the lever (10) after one nailing, characterized in that the slider device comprises a slide (18), a slider (19), a roller (30) and a roller shaft (31), the slider (19) disposed in the slide (18), the roller shaft (31) is mounted on the slider (19), and an axis of the roller shaft (31) is perpendicular to the lever (10) a plane of rotation intersecting the central axis of the slider (19), the roller (30) being pivotally mounted on the roller shaft (31), the first end of the lever (10) (101) Extending into the slide (18) and abutting on the outer peripheral surface of the roller (30) during the nailing process to urge the slider (19) to move along the slide (18).
The electromagnetic nail gun according to claim 1, characterized in that the bottom of the slide (18) is provided with a through groove (181) extending along the longitudinal direction of the slide (18).
The electromagnetic nail gun according to claim 2, wherein the slider (19) has a hollow portion (191), and the roller (30) is located in the hollow portion (191), the first end A portion (101) extends through the through groove (181) to enter the hollow portion (191).
The electromagnetic nail gun according to claim 1, wherein a fixed position shaft (32) is further disposed on the slider (19), and the first end portion (in the reset process of the lever (10) 101) Abutting on the limit shaft (32).
The electromagnetic nail gun according to claim 4, wherein the first end portion (101) is located between the roller shaft (31) and the limit shaft (32).
The electromagnetic nail gun according to any one of claims 1 to 5, characterized in that the lever driving device comprises an electromagnet and a driving iron core (11), and the driving iron core (11) is connected to the lever (10) and capable of reciprocating movement in a predetermined direction (L) to drive the lever (10) for driving the drive core (11) to move.
The electromagnetic nail gun according to claim 6, wherein said resetting means comprises a spring (28) capable of biasing said lever (10) to reset said lever (10), The maximum amount of expansion and contraction of the spring (28) is smaller than the stroke of the drive core (11).
The electromagnetic nail gun according to claim 7, characterized in that the ratio of the maximum expansion amount of the spring (28) to the stroke of the drive core (11) is less than 1:2.
The electromagnetic nail gun according to claim 7, wherein the lever driving device further comprises a connecting rod (17), two ends of the connecting rod (17) and the driving iron core (11) and the The lever (10) is hinged.
The electromagnetic nail gun according to claim 9, wherein said lever (10) includes a second end (102), said slider (19) being located at said first end (101), said a resetting device is located at the second end (102), a fulcrum (P) of the lever (10) being located between the first end (101) and the second end (102), the connection A hinge point (R) of the rod (17) and the lever (10) is located between the first end (101) and the fulcrum (P).