TWI656923B - Electric rivet gun - Google Patents

Abstract

An electric rivet gun is suitable for mounting a rivet and includes a motor, a screw driven by the motor, a clamping unit coupled to the screw, and an anti-slip unit. The clamping unit includes a plurality of clamping blocks and a clamping spring. The spring force generated by the clamping spring causes the clamping blocks to grip the rivet. The anti-slip unit includes a shaft hole, at least one abutting hole communicating with the shaft hole to the outside, at least one abutting member disposed in the abutting hole, a collar shielding the abutting hole, and at least one abutting A non-slip spring is placed between the abutting member and the collar. When the rivet is inserted into the shaft hole, the elastic force generated by the anti-slip spring pushes against the abutting member, so that the abutting member abuts against the rivet and prevents the stylus from sliding down, thereby facilitating use.

Description

Electric rivet gun

The invention relates to a hand tool, in particular to an electric rivet gun.

Referring to FIG. 1 and FIG. 2, a conventional rivet gun 1 as disclosed in Taiwan Publication No. 201107057 includes a casing 11 and a tie rod 12 movable along an axis L1 and defining a clamping space 121. a clamping block 13 disposed at an angle of the clamping space 121 and angularly arranged around the axis L1, a pushing member 14 disposed in the clamping space 121 adjacent to the clamping block 13 , and a The two ends of the clamping space 121 and along the axis L1 respectively abut against the spring 15 of the pushing member 14 and the pull rod 12. The outer casing includes a front casing portion 111 disposed along the axis L1. The clamping space 121 includes an opening 122 that communicates with the outside along the axis L1, and the aperture of the clamping space 121 is gradually reduced to the opening 122. The clamping blocks 13 are adjacent to the opening 122 and can pass through the opening 12 from the opening 122.

The pull rod 12 is movable relative to the front housing portion 111 between an initial position (shown in Figure 1) and a pull position (shown in Figure 2). In the initial position, the pull rod 12 is adjacent to the front shell portion 111 along the axis L1 such that the clamping blocks 13 abut against The front housing portion 111 does not pass through the pull rod 12 from the opening 122. The pusher 14 is abutted by the clamping blocks 13 to compress the spring 15. The clamping blocks 13 are located in the clamping space 121 and spaced apart from the axis L1 such that a pull stud 16 can be placed between the clamping blocks 13 along the axis L1 from the outside.

At this time, the pull rod 12 can be driven to move along the axis L1 and reach the pulled position rearward. In the pulled position, the pull rod 12 is away from the front housing portion 111 such that the clamping blocks 13 are spaced from the front housing portion 111 along the axis L1. The spring 15 is no longer compressed to push against the pusher 14 , and the pusher 14 is pushed against the clamps 13 such that the clamps 1 pass through the opening 122 . When the clamping block 13 is pushed by the pushing member 14 to move toward the opening 122, the clamping block 13 gradually approaches the axis L1 as the aperture of the clamping space 121 gradually decreases to the opening 122. In turn, the rivet 16 can be clamped. The rivet 16 is clamped and pulled back, eventually being pulled and riveted to the panel.

According to the foregoing structure, it can be known that during the pulling process, the pull rod 12 needs to be away from the front shell portion 111 and the clamping block 13 and the front shell portion 111 are spaced along the axis L1 to generate the clamping. The effect of pulling the nail 16. A disadvantage of such a design is that, in the initial position, the rivet 16 can be placed between the clamping blocks 13, but it is relatively easy to slip due to the absence of a clamping effect, which is quite inconvenient in use.

Accordingly, it is an object of the present invention to provide an electric rivet gun that has a non-slip effect and is convenient to use.

Therefore, the electric rivet gun of the present invention is suitable for mounting a rivet, and comprises a casing, a driving unit, a pulling unit, a clamping unit, an anti-slip unit, and a sensing unit.

The drive unit includes a motor secured to the housing and a drive shaft driven by the motor and extending along a first axis.

The pulling unit includes a screw extending along a second axis, and a connecting member connected to the screw and having a hollow tubular shape around the second axis. The screw is driven by the drive unit to be movable along the second axis.

The clamping unit includes a clamping sleeve connected to the connecting member, a plurality of clamping blocks arranged at an angular interval around the second axis, a center rod, and a clamping spring. The clamping sleeve has a surrounding wall and a clamping opening defined by the surrounding wall. The surrounding wall, the connecting member and the screw jointly define a clamping space. The clamping opening is disposed along a second axis on a side opposite to the connecting member and communicates with the clamping space. The aperture of the clamping space is gradually reduced to the clamping opening along the direction of the second axis opposite the connector. The clamping blocks are disposed in the clamping space and adjacent to the clamping opening. The center rod has a head disposed in the clamping space adjacent to the clamping blocks, and a shaft portion connected to the head and passing through the screw along the second axis. The clamping spring surrounds the shaft portion and abuts the head and the screw respectively along two ends of the second axis. The clip The spring can generate an elastic force such that the center rod remains permanently against the clamping blocks. The clamping block can pass through the clamping opening when the center rod is abutted and can move toward the second axis to clamp the pulling nail.

The anti-slip unit includes a positioning member disposed along the second axis and fixed to the outer casing, at least one abutting member disposed on the positioning member, a set of rings, and at least one anti-slip spring. The positioning member has a positioning wall surrounding the second axis, a shaft hole defined by the positioning wall, and at least one abutting hole that communicates to the outside through the positioning hole through the shaft hole. The at least one abutting member is disposed on the at least one abutting hole and partially penetrates the shaft hole. The collar is sleeved on the positioning member and the position corresponds to the at least one abutting hole to shield the at least one abutting hole. The at least one anti-slip spring is disposed in the at least one abutting hole and the two ends respectively abut against the at least one abutting member and the collar. When the rivet is inserted into the shaft hole, the at least one abutting member can be pushed against the at least one anti-slip spring, so that the elastic force generated by the at least one anti-slip spring pushes against the at least one abutting member. The at least one abutting member is forced against the rivet to prevent the stylus from slipping off.

The sensing unit includes a magnet disposed on the screw of the pulling unit, and a sensing module fixed to the housing and corresponding to the magnet. The sensing module has a first magnetic sensor and a second magnetic sensor arranged at intervals along a direction parallel to the second axis. The clamping sleeve of the clamping unit is movable between an initial position and a pulling position relative to the positioning member of the anti-slip unit. In the initial position, the clamping sleeve is adjacent to the positioning member, and the clamping blocks abut against the positioning member. The position of the magnet and the first The position of the magnetic sensor corresponds. The clamping sleeve can be moved by the screw to move along the second axis and to the pulling position. In the pulled position, the clamping sleeve is remote from the positioning member, and the clamping blocks are spaced from the positioning member. The position of the magnet corresponds to the position of the second magnetic sensor.

The utility model has the advantages that the abutting member is pressed against the rivet to prevent the stylus from slipping, thereby facilitating the use.

2‧‧‧ Shell

3‧‧‧Drive unit

31‧‧‧Motor

32‧‧‧Drive shaft

33‧‧‧ planetary gear set

331‧‧‧ planetary gear

531‧‧‧ head

532‧‧‧ shaft body

533‧‧‧Discharge hole

54‧‧‧Clamping spring

55‧‧‧Limited parts

551‧‧‧Limited slot

332‧‧‧ bracket

333‧‧‧ Output gear

4‧‧‧ Pull unit

41‧‧‧Transmission gear

42‧‧‧ screw

421‧‧‧ First Department

422‧‧‧Second Department

423‧‧‧ first through hole

424‧‧‧second through hole

425‧‧‧Abutment

43‧‧‧Connecting parts

5‧‧‧Clamping unit

51‧‧‧Clamping sleeve

511‧‧‧ Surrounding wall

512‧‧‧Clamping port

513‧‧‧Clamping space

52‧‧‧Clamping block

53‧‧‧ center pole

6‧‧‧Slip unit

61‧‧‧ Positioning parts

611‧‧‧ positioning wall

612‧‧‧Axis hole

613‧‧‧Abutment hole

62‧‧‧After the top piece

63‧‧‧ collar

64‧‧‧Slip spring

7‧‧‧Sensor unit

71‧‧‧ magnet

72‧‧‧Sensing module

721‧‧‧First Magnetic Sensor

722‧‧‧Second magnetic sensor

73‧‧‧ fixed seat

731‧‧‧ slotted

9‧‧‧ Pull pins

R1‧‧‧ first axis

R2‧‧‧ first axis

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic cross-sectional view of a conventional rivet gun in an initial position; FIG. 2 is a conventional rivet Figure 3 is a perspective assembled view of an embodiment of the electric rivet gun of the present invention; Figure 4 is a perspective exploded view of the embodiment; Figure 5 is a perspective view of the embodiment A complete perspective view of the embodiment; FIG. 6 is an incomplete partial exploded view of the embodiment; FIG. 7 is a cross-sectional view of the clamping sleeve of the embodiment in an initial position; FIG. 8 is a partial enlarged view of FIG. Figure 9 and Figure 9 are schematic cross-sectional views of the clamping sleeve of the embodiment in a pulling position.

Referring to FIG. 3, FIG. 4 and FIG. 5, an embodiment of the electric rivet gun of the present invention is suitable for mounting a pull stud 9 and includes a casing 2, a driving unit 3, a pulling unit 4, and a clamping unit 5. An anti-slip unit 6, and a sensing unit 7.

Referring to FIG. 4, FIG. 6, and FIG. 7, the driving unit 3 includes a motor 31 fixed to the outer casing 2, a driving shaft 32 driven by the motor 31 and extending along a first axis R1, and a driving unit connected thereto. Planetary gear set 33 of shaft 32. The planetary gear set 33 includes a plurality of planetary gears 331 that mesh with the drive shaft 32 of the drive unit 3, a bracket 332 that is driven by the planetary gears 331 to rotate about the first axis R1, and a bracket 332. A linked output gear 333.

The pulling unit 4 includes a transmission gear 41 that meshes with the output gear 333 of the driving unit 3 and is rotatable about a second axis R2 parallel to the first axis R1, and is pivoted along the transmission gear 41 along the first A screw 42 extending from the second axis R2 and a connecting member 43 connected to the screw 42. The screw 42 has a hollow tubular shape and has a first tube portion 421 connected to the connecting member 43 and a second tube portion 422 connected to the first tube portion 421 along the second axis R2. The first tube portion 421 has a first through hole 423 extending along the second axis R2. The second tube portion 422 has a second through hole 424 that communicates with the first through hole 423 along the second axis R2 and has a smaller aperture than the first through hole 423, and is disposed at a boundary with the first through hole 423. The abutment surface 425. The screw 42 is interlocked by the transmission gear 41 to be movable along the second axis R2. The connecting member 43 has a hollow tubular shape around the second axis R2.

Referring to FIG. 6 , FIG. 7 and FIG. 8 , the clamping unit 5 includes a clamping sleeve 51 connected to the connecting member 43 , a plurality of clamping blocks 52 arranged at an angular interval around the second axis R2 , and a center rod 53 . , a clamping spring 54 , and a limiting member 55 . The clamping sleeve 51 has a surrounding wall 511 and a clamping opening 512 defined by the surrounding wall 511. The surrounding wall 511, the connecting member 43 and the first tube portion 421 of the screw 42 collectively define a clamping space 513 that communicates with the first through hole 423. The clamping opening 512 is disposed on a side opposite to the connecting member 43 along the second axis R2 and communicates with the clamping space 513. The aperture of the clamping space 513 is gradually reduced to the clamping opening 512 along the direction of the second axis R2 opposite to the connecting member 43. The clamping blocks 52 are disposed in the clamping space 513 and adjacent to the clamping opening 512.

The center rod 53 has a head portion 531 disposed in the clamping space 513 and adjacent to the clamping block 52, and is connected to the head portion 531 and is disposed in the first through hole along the second axis R2. 423 and the shaft portion 532 of the second through hole 424 and a discharge hole 533 penetrating along the second axis R2. The discharge opening 533 is adapted to allow the residue of the pull stud 9 to be discharged from the side opposite to the head 531. The clamping spring 54 surrounds the shaft portion 532 and abuts against the head portion 531 and the abutting surface 425 of the screw 42 along the two ends of the second axis R2. The clamping spring 54 can generate an elastic force such that the center rod 53 is constantly held against the clamping block 52. When the clamping block 52 is abutted by the center rod 53, the clamping opening 512 can be passed out and can move toward the second axis R2 to clamp the pulling nail 9. The limiting member 55 is disposed in the clamping space 513 and surrounds the second axis R2.

The limiting member 55 defines a plurality of limiting slots 551 respectively accommodating the clamping blocks 52. The limiting slots 551 extend in the direction of the second axis R2 to enable the clamping blocks 52 to slide in the limiting slots 551 in the direction of the second axis R2.

Referring to FIG. 4, FIG. 7, and FIG. 8, the anti-slip unit 6 includes a positioning member 61 disposed along the second axis R2 and fixed to the outer casing 2, and an abutting member 62 disposed on the positioning member 61. 63, and two anti-slip springs 64. The positioning member 61 has a positioning wall 611 surrounding the second axis R2, a shaft hole 612 defined by the positioning wall 611, and an abutting of the shaft hole 612 through the positioning wall 611 to communicate with the outside. Hole 613. The abutting members 62 are respectively disposed on the abutting holes 613 and partially penetrate the shaft holes 612. The collar 63 is sleeved on the positioning member 61 and positions corresponding to the abutting holes 613 to shield the abutting holes 613. The anti-slip springs 64 are respectively disposed in the abutting holes 613, and the two ends of each of the anti-slip springs 64 are respectively abutted against the respective abutting members 62 and the collar 63.

When the pull stud 9 is inserted into the shaft hole 612, the abutting members 62 can be pushed against the anti-sliding springs 64 and the anti-slip springs 64 can be compressed to push the elastic forces generated by the anti-slip springs 64 against the abutting members 62. The abutting members 62 are forced against the rivet 9 to prevent the rivet 9 from slipping off. It should be noted that in the present embodiment, the number of the abutting members 62, the non-slip springs 64, and the abutting holes 613 is two, but may be one or three. In the present embodiment, the abutting members 62 are substantially steel balls, but may be of other shapes that can partially penetrate the shaft hole 612 and abut against the pull stud 9, such as a cylinder.

The sensing unit 7 includes a magnet 71 disposed on the screw 42 of the pulling unit 4, a sensing module 72 fixed to the housing 2 and corresponding to the magnet 71, and a fixing to the screw 42 opposite to the A fixing seat 73 at one end of the first tube portion 421. The sensing module 72 has a first magnetic sensor 721 and a second magnetic sensor 722 arranged in a direction parallel to the second axis R2. The fixing base 73 has a fitting groove 731 for inserting the magnet 71.

In use, the motor 31 drives the drive shaft 32 to rotate about the first axis R1 to rotate the bracket 332 of the planetary gear set 33 to rotate about the first axis R1, thereby interlocking the output gear 333 around the first axis R1. Turn. The transmission gear 41 is driven by the output gear 333 to rotate about the second axis R2 such that the screw 42 moves along the second axis R2. As the screw 42 moves along the second axis R2, the clamping sleeve 51 of the clamping unit 5 is movable relative to the positioning member 61 of the anti-skid unit 6 between an initial position and a pulling position.

In the initial position (as shown in FIG. 7), the clamping sleeve 51 is adjacent to the positioning member 61. The clamping blocks 52 abut against the positioning member 61 without being passed out of the clamping sleeve 51 by the clamping opening 512. The clamping blocks 52 are located in the clamping space 513 and spaced apart from the second axis R2 such that the pull stud 9 can be placed between the clamping blocks 52 by the shaft holes 612 of the positioning member 61. The head portion 531 of the center rod 53 is abutted by the clamping blocks 52 to compress the clamping spring 54. At this time, the position of the magnet 71 corresponds to the position of the first magnetic sensor 721.

The clamping sleeve 51 can be driven by the screw 42 to move along the second axis R2 and reach the pulling position. In the pulled position (as shown in FIG. 9), the clamping sleeve 51 is away from the positioning member 61. The clamping blocks 52 are spaced from the positioning member 61 such that the clamping spring 54 is no longer compressed. The clamping spring 54 pushes against the head 531 of the center rod 53 to push the head 531 against the clamping block 52, so that the clamping blocks 52 move toward the clamping opening 512 and are The clamping opening 512 passes through the clamping sleeve 51. When the clamping block 52 is pushed by the head 531 to move toward the clamping opening 512, the clamping block 52 gradually becomes gradually as the aperture of the clamping space 513 is gradually reduced to the clamping opening 512. Adjacent to the second axis R2, the rivet 9 can be clamped. At this time, the position of the magnet 71 corresponds to the position of the second magnetic sensor 722. The rivet 9 is pulled in a clamped state, finally pulled and riveted to the panel, and the residue can be discharged from the discharge aperture 533.

Referring to Figures 4, 6, and 7, the present invention has the following effects:

1. The top member 62 is biased against the rivet 9 to prevent the pull stud 9 from slipping off, thereby facilitating use.

2. The limiting members 55 enable the clamping blocks 52 to slide in the limiting slots 551 in the direction of the second axis R2 to improve the stability of the operation.

3. The sensing unit 7 can assist in controlling the rotation of the motor 31. When in the initial position (refer to FIG. 7), the position of the magnet 71 corresponds to the position of the first magnetic sensor 721, and the first magnetic sensor 721 can send a message to control the motor 31. The screw 42 is moved in a direction away from the positioning member 61. When in the pulling position (refer to FIG. 9), the position of the magnet 71 corresponds to the position of the second magnetic sensor 722, and the second magnetic sensor 722 can send a message to control the motor 31 to drive the screw 42 toward The direction of the positioning member 61 moves.

4. The residue of the pull stud 9 can be discharged from the side opposite to the head 531 by the discharge hole 533 of the center rod 53.

In summary, the electric rivet gun of the present invention is supported by the abutting member 62 against the rivet 9 to prevent the rivet 9 from slipping off, thereby facilitating the use, and thus the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

Claims (7)

An electric rivet gun for mounting a rivet, comprising: a casing; a driving unit comprising a motor fixed to the casing, and a driving shaft driven by the motor and extending along a first axis; The unit includes a screw extending along a second axis, and a connecting member connected to the screw and having a hollow tubular shape around the second axis, the screw being driven by the driving unit to be movable along the second axis; a clip The holding unit includes a clamping sleeve connected to the connecting member, a plurality of clamping blocks arranged at an angular interval around the second axis, a center rod, and a clamping spring having a surrounding wall, and a clamping opening defined by the surrounding wall, the surrounding wall, the connecting member and the screw jointly define a clamping space, the clamping opening is disposed along the second axis opposite to the connecting member Sidely communicating with the clamping space, the aperture of the clamping space is gradually reduced to the clamping opening along the direction of the second axis opposite to the connecting member, and the clamping blocks are disposed in the clamping space and adjacent to the clamping space Clamping port, the center rod has Provided in the clamping space and adjacent to the head of the clamping block, and a shaft portion connected to the head and extending along the second axis to the screw, the clamping spring surrounding the rod The body and the two ends of the second axis respectively abut against the head and the screw, and the clamping spring can generate an elastic force to keep the center rod constant against the clamping block, and the clamping When the block is abutted by the center rod, the holder can pass through the holder and can move toward the second axis to clamp the rivet; An anti-slip unit includes a positioning member disposed along the second axis and fixed to the outer casing, at least one abutting member disposed on the positioning member, a set of rings, and at least one anti-slip spring, the positioning member having a surrounding a positioning wall of the second axis, a shaft hole defined by the positioning wall, and at least one abutting hole that communicates to the outside through the positioning hole, the at least one abutting member is disposed on the at least one Abutting the hole and partially penetrating the shaft hole, the collar is sleeved on the positioning member and corresponding to the at least one abutting hole to shield the at least one abutting hole, the at least one anti-slip spring is disposed on the at least one abutting The top hole and the two ends respectively abut against the at least one abutting member and the collar, and when the pulling pin is inserted into the shaft hole, the at least one abutting member can be pushed against the at least one anti-slip spring, so that the The elastic force generated by the at least one anti-slip spring pushes against the at least one abutting member, the at least one abutting member is biased against the stylus to prevent the stylus from sliding down; and a sensing unit, the sensing unit a magnet including a screw disposed on the pulling unit, and a fixing a sensing module corresponding to the magnet, the sensing module having a first magnetic sensor and a second magnetic sensor arranged in a direction parallel to the second axis, the clamping The clamping sleeve of the unit is movable between an initial position and a pulling position relative to the positioning member of the anti-slip unit, in the initial position, the clamping sleeve is adjacent to the positioning member, and the clamping blocks abut In the positioning member, the position of the magnet corresponds to the position of the first magnetic sensor, and the clamping sleeve can be driven by the screw to move along the second axis and reach the pulling position, in the pulling position, The clamping sleeve is away from the positioning member, and the clamping blocks are spaced apart from the positioning member, and the position of the magnet corresponds to the position of the second magnetic sensor. The electric rivet gun of claim 1, wherein the sensing unit further comprises a fixing base fixed to the pulling unit opposite to one end of the connecting member, the fixing base having an embedded surface for embedding the magnet groove. The electric rivet gun of claim 1, wherein the clamping unit further comprises a limiting member disposed in the clamping space and surrounding the second axis, the limiting member defining a plurality of accommodating numbers respectively a limiting slot of the clamping block, the limiting slots extending in a direction of the second axis to enable the clamping blocks to slide in the limiting slot in the direction of the second axis. The electric rivet gun of claim 1, wherein the center rod of the clamping unit further has a discharge hole extending through the second axis, the discharge hole being adapted to be used for the residue of the rivet Discharged on one side of the head. The electric rivet gun of claim 1, wherein the driving unit further comprises a planetary gear set coupled to the drive shaft, the pulling unit further comprising a meshing with the planetary gear set and rotatable about the second axis The transmission gear is pivotally disposed on the transmission gear and is interlocked by the transmission gear. The electric nail gun of claim 5, wherein the planetary gear set includes a plurality of planetary gears that mesh with a drive shaft of the drive unit, and a carriage that is driven by the planetary gears to rotate about the first axis. And an output gear that is coupled to the carriage and meshes with a transmission gear of the pulling unit. The electric rivet gun of claim 1, wherein the screw of the pulling unit has a hollow tubular shape and has a first tube portion connected to the connecting member, and a first tube portion connected along the second axis a second tube portion having a first through hole extending along the second axis and communicating with the clamping space, the second tube portion having a first through hole communicating along the second axis Small aperture a second through hole of the first through hole, and an abutting surface disposed at a boundary with the first through hole, the first through hole and the second through hole are provided for the shaft portion of the center rod The abutment surface is for the clamping spring to abut.