CN102233563B - Quick clamping device for electric hammer - Google Patents

Abstract

The invention provides an electric hammer quick-clamping device, which is installed on the striking head of the electric hammer, and includes at least two clamping parts for clamping fasteners such as nails, wherein the striking head contains reciprocating motion Hitting the shaft, the hitting shaft acts on the fasteners such as the nails, and a magnetic device is also provided in the quick clip device. The magnetic device can be a magnetic part arranged on the clamping piece or a magnetic element. The clamping members magnetically attract each other to have a clamped position for clamping the nail, and by magnetic mutual repulsion have a loose position for releasing the nail. The present invention realizes the clamping and release of fasteners such as nails by setting magnetic parts or components on the clamping parts, and through the transformation of the relative positions between the magnetic parts or components, the structure is compact and the clamping effect is good; the magnetic poles are fully utilized Features, novel design, high degree of automation.

Description

Electric Hammer Quick Clamping Device

technical field

The invention relates to the field of electric tools, in particular to an electric hammer that provides force through a striking device to allow nails or other fastening elements to enter a substrate.

Background technique

An electric hammer is an electric tool that gradually drives fasteners such as nails into the base material through the reciprocating motion of the striking device. During the nail being struck, it needs to be clamped by a clamping device. The existing clamping device is usually clamped One or any combination of jaws, springs or chucks of the component, in order to make the nails and other fasteners completely drive into the substrate, the clamping device can clamp the nails and release the nails through a biasing device However, existing clamping devices still have defects such as unreliable clamping or mechanisms that cannot clamp nails with different diameters, and a small scope of application.

Contents of the invention

In view of the deficiencies in the above-mentioned prior art, the present invention provides an electric hammer quick-clamping device with good clamping effect, capable of clamping nails of different diameters, and wide application range.

To achieve the above object, the present invention adopts the following technical solutions:

An electric hammer quick clamping device, which is installed on the striking head containing the striking shaft, includes at least two clamping parts, the clamping parts have a clamping position and a loosening position, and also include a magnetic device, the magnetic In the clamping position of the device, opposite poles are magnetically opposed, and in the released position, like poles are magnetically opposed.

A further structure of the present invention is that the magnetic device includes a magnetic portion respectively provided on each clamping member.

The magnetic part is composed of at least one N-pole magnetic unit and at least one S-pole magnetic unit, the at least one N-pole magnetic unit and the at least one S-pole magnetic unit are arranged side by side, and every two adjacent magnetic units opposite polarity.

At the clamping position, the N pole and the S pole magnetic unit of the magnetic element arranged on at least one of the clamping parts are respectively connected with the S pole and the N pole of the magnetic element arranged on at least another clamping part. One-to-one correspondence, at the release position, the N pole and S pole magnetic unit of the magnetic element arranged on at least one of the clamping parts are respectively connected with the N pole, S pole of the magnetic element arranged on at least another clamping part, There is a one-to-one correspondence between the S poles.

It also includes an outer sleeve, the outer sleeve is movably connected to the striking head.

An inner sleeve is set inside the outer sleeve, and the at least two clamping parts are radially movable mounted on the inner sleeve, wherein at least one clamping part is fixed in the axial direction of the inner sleeve, at least The other clamping part has a first position and a second position in the axial direction of the inner sleeve and is movable between the first position and the second position.

The outer sleeve is connected to the at least one other clamping member movable between a first position and a second position.

The front end surface of the outer sleeve protrudes from the front end surface of the inner sleeve by a distance not smaller than the distance between the first position and the second position.

Resilient means act on said clamping member to bias it toward the center of the inner sleeve.

An elastic element acting on the outer casing and biasing the outer casing to the outside of the striking head is disposed inside the striking head.

In yet another further development of the invention, the magnetic device comprises a magnetic element respectively arranged on each clamping member.

A gear structure is connected to at least one of the at least two clamping parts, and the gear is engaged with the rack.

The at least two clamping parts are mounted radially movable on an inner sleeve, and an outer sleeve is set outside the inner sleeve, and the outer sleeve is connected with the rack.

The front end surface of the outer casing protrudes from the front end surface of the inner casing by a distance sufficient to provide a distance for the rack to move in the axial direction of the casing.

Biasing means acts on the clamping member to bias it toward the center of the inner sleeve.

The magnetic element and the clamping piece can also be integrated.

By adopting the above technical solutions, the following beneficial technical effects can be achieved:

The invention combines the clamping and loosening actions of the quick clamp with the polarity conversion characteristics of the magnetic device by providing a magnetic device on the quick clamp device, fully utilizes the characteristics of the magnetic pole, has novel design and high degree of automation.

In addition, the quick clip device of the present invention combines the nailing process with the relative position change between the magnetic parts or the relative magnetic pole reversal between the magnetic elements, so as to realize the clamping and releasing of fasteners such as nails, and has a compact structure Good clamping effect.

Description of drawings

Fig. 1 is the explosion schematic diagram of an embodiment of the electric hammer quick-clamping device of the present invention;

Fig. 2 is a sectional view of the electric hammer quick-clamping device of the present invention, wherein two clamping parts are in clamping positions for clamping nails;

Fig. 3 is a cross-sectional view of the electric hammer quick-clamping device of the present invention, wherein the two clamping parts are in the loosened position for releasing the nail;

Fig. 4 is a cross-sectional view of the electric hammer quick-clamping device of the present invention, wherein the striking shaft passes through two clamping parts to completely drive the nail into the position of the workpiece;

Figure 5 is a structural diagram and a mutual positional relationship diagram of the magnetic elements respectively arranged on the clamping parts, wherein figure a is a schematic diagram of the suction of different polarity units on the magnetic elements when the two clamping parts are in the clamping position, Figure b is a schematic diagram of two clamping parts in a released position when the units of the same polarity on the magnetic element are corresponding and repelled.

Fig. 6 is a sectional view of another embodiment of the present invention, wherein the clamping member is in the position of clamping the nail;

7 is a cross-sectional view of another embodiment of the present invention, wherein the clamping member is in the position of releasing the nail;

Fig. 8 is a schematic diagram when the gear on the clamping part is driven by the rack and is in the first position;

Fig. 9 is a schematic diagram when the gear on the clamping part is in the second position driven by the rack;

Fig. 10 is a schematic diagram of the corresponding relationship between the magnetic poles of the magnetic element from the clamping position to the loosening position.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, the electric hammer quick-clamping device 10 of the present invention is installed on the hitting head 20 of the electric hammer, and the quick-clamping device includes two clamps for clamping and releasing fasteners such as nails 1 Fasteners 2, 2', the hitting head 20 contains a reciprocating hitting shaft 21, and the hitting shaft 21 acts on fasteners such as nails 1, and the two clamping parts 2, 2' are respectively equipped with magnetic parts 3. The two clamping parts 2, 2' have a clamping position (shown in Figure 2) for clamping the nail through the mutual attraction of the magnetic parts 3, and have a loose position for releasing the nail through the mutual repulsion of the magnetic parts 3. open position (position shown in Figure 3).

As shown in Figure 5, the magnetic part 3 is made up of one or several N-pole magnetic units and one or several S-pole magnetic units, and the N-pole magnetic units and the S-pole magnetic units are spaced from each other. At the clamping position, the N pole and S pole magnetic unit of the magnetic part 3 arranged on one of the clamping parts 2' are respectively connected with the S pole and N pole of the magnetic part 3 arranged on the other clamping part 2 One-to-one correspondence, at the loosened position of the two clamping pieces 2, 2', the N-pole and S-pole magnetic units of the magnetic part 3 provided on one of the clamping pieces 2' are respectively connected to the magnetic units of the other clamping piece 2. There is a one-to-one correspondence between the N pole and the S pole of the magnetic part 3 .

2 to 4, it can be seen that the two clamping parts 2, 2' have relative displacement along the reciprocating direction of the striking shaft 21, so that the magnetic parts 3 with N poles and S poles spaced apart from each other can attract each other and drive the clamping parts. Clamping parts 2, 2' clamp the nails, or drive the clamping parts 2, 2' to loosen the nails by repelling each other. The hitting shaft 21 generates relative movement in the reciprocating direction, and an outer sleeve 7 is also provided, which is movably connected to the hitting head 20. The first elongated hole 5, one of the clamping parts 2' is provided with a sliding arm 15 which passes through the first elongated hole 5 and can slide along the first elongated hole 5. An inner sleeve 8 is set inside the outer sleeve 7, and a second elongated hole 6 parallel to the reciprocating direction of the striking shaft 21 is provided on the inner sleeve 8, and the sliding arm 15 provided on one of the clamping parts 2' passes through. This second elongated hole 6 can also slide in this second elongated hole 6, and the length of the first elongated hole 5 is roughly equal to the front end surface 71 of the outer sleeve and the surface of the workpiece contacting the outer sleeve 7 will drive the inner sleeve 8 to strike together. The nail is driven into the depth of the workpiece in the stage of clamping the nail indented in the head 20, and the second long hole 6 mainly provides one of the clamping parts 2' from the first position to the second position along the axial direction of the inner sleeve 8. The distance between the two positions, this distance is essentially the relative displacement in the reciprocating direction of the striking shaft 21 when the magnetic part 3 of the two clamping parts 2, 2' corresponds to the same magnetic pole. It can be known from the relationship that the front end surface 71 of the outer sleeve protrudes from the front end surface 81 of the inner sleeve, and its protrusion distance is equal to or preferably greater than the distance between the first position and the second position. In this embodiment, the outer sleeve 7 is also sleeved A casing supporting part 9, the outer casing 7 can be stretched in the casing supporting part 9, and the casing supporting part 9 is fixed on the casing of the electric hammer striking head 20 by fasteners such as screws. There is a bias elastic element 11 between the 7 and the inner sleeve 8, which is used to reset the outer sleeve 7 automatically.

2 to 4, it can be seen that the two clamping parts 2, 2' from the clamping position to the loosening position not only have a relative displacement along the reciprocating direction of the striking axis 21, but also have a relative displacement along the vertical striking axis 21. Displacement in the reciprocating direction, in order to achieve this purpose, the present invention installs the two clamping parts 2, 2' in the radial holes 16 symmetrically arranged on the inner sleeve 8 respectively, and the A first biasing element 4 is provided and a second biasing element 13 is provided in the form of a spring. In order to securely clamp the nail, the surface of the two clamping parts clamping the nail is provided with a V-shaped groove 17. In order to make the fasteners such as nails completely drive into the workpiece, the striking shaft 21 needs to be driven from the two clamping parts 2, 2′. Pass between, in order to reduce the resistance of this passage, be provided with guiding slope 18 on the side of clamping part 2, 2 ' near hitting shaft 21. In addition, an encapsulation cover 14 is provided for encapsulating the clamping member 2, 2' biasing element, etc. in the inner sleeve 8.

The clamping parts in this embodiment are not limited to two, and the number of clamping parts can be increased correspondingly for more secure clamping.

The working principle of the electric hammer quick-clamping device in this embodiment is as follows:

When clamping the nail, overcome the bias elastic element 11 to push the outer sleeve 7, when the left side of the first elongated hole 5 on the outer sleeve 7 pushes against the sliding arm 15 on one of the clamping parts 2′, push the outer sleeve 7 again , so that the two clamping parts 2, 2' reach the release position, and at this time, the magnetic units of the same polarity of the magnetic elements 3 respectively arranged on the two clamping parts 2, 2' correspond to each other. Under the action, the two clamping parts 2, 2' respectively overcome the action of the respective elastic biasing elements 4, 13 and move towards each other to a maximum distance. Now the nail 1 can be put in, the applied load to the outer sleeve 7 is removed, the biasing element 11 begins to reset, the outer sleeve 7 is ready to reset under the action of the biasing element 11, and the first elongated hole 5 on the outer sleeve 7 The right side of the right side is against the sliding arm 15 on one of the clamping parts 2', so that the magnetic units of different polarities of the magnetic elements 3 on the two clamping parts 2, 2' correspond to each other. Next, the two clamping parts 2, 2' are attracted to each other, thereby clamping the nail.

When working, the front end of the outer sleeve 7 touches the workpiece and retracts into the supporting part 9 until the two clamping parts 2, 2' are in the loosened position, at this time the two clamping parts 2, 2' are separated to the maximum distance , nail 1 and hitting shaft 21 can pass through inner casing 8. After the work is finished, since the load applied by the workpiece to the outer sleeve 7 has been removed, the quick clamping device 10 returns to its original state.

6 to 10 are diagrams of another embodiment of the present invention. Like the first embodiment, the clamping device also includes an outer sleeve 7, which is movably connected to the striking head 20. The tube 7 is externally connected with a sleeve support member 9, and the external sleeve 7 is internally sleeved with an inner sleeve 8, and the inner sleeve 8 is equipped with clamping parts 2, 2' for clamping and releasing fasteners such as the nail 1.

The difference from the first embodiment is that the clamping parts 2, 2' are respectively provided with magnetic elements 31, 31', and the magnetic pole polarity of one end of the magnetic element 31 facing the center of the inner sleeve 8 is always kept different. change, and another magnetic element 31' is connected with a gear structure, the gear is meshed with a rack 32, two outriggers 35 are arranged on the rack 32, and the outriggers 35 are connected to the outer sleeve 7, thus , the movement of the outer sleeve 7 relative to the inner sleeve 8 can drive the rack 32 to move between the first position and the second position along the axial direction of the inner sleeve 8, and then the gear rotates so that one of the magnetic elements 31 'The polarity of the magnetic pole is reversed, and the magnetic elements 31, 31' on the two clamping parts 2, 2' at the clamping position are oppositely reversed to the two clamping parts 2, 2' at the loosening position. The same-sex magnetic poles of the magnetic elements 31, 31' are opposite to each other.

The front end surface 71 of the outer casing protrudes from the front end surface 81 of the inner casing 8. During the nailing process, the surface of the workpiece first touches the front end surface 71 of the outer casing 7. Comparing Fig. 6 and Fig. 7, it can be seen that the protrusion distance should satisfy The moving distance of the rack 32 between the first position and the second position.

The clamping parts 2, 2' are mounted on the inner sleeve 8 so that they can move radially relative to the inner sleeve 8, and the clamping parts 2, 2' are provided with biasing parts which enable the clamping parts to be biased toward the center of the inner sleeve 8. Pressing device, in this embodiment, the biasing device acting on one of the tightening parts 2' is another magnetic element 33, and the magnetic pole direction of this another magnetic element 33 remains unchanged all the time. Therefore, in one of the During the magnetic pole reversal process of the magnetic element 31' on the clamping piece 2', the other magnetic element 33 can attract or push away the magnetic element 31', and the biasing device acting on the other clamping piece 2 Be a spring 14.

In other embodiments, the magnetic element and the clamping piece can also be integrated. In addition, in order to achieve the purpose of clamping and loosening through polarity reversal, it is not limited to the magnetic element on the clamping piece, and also It could be a magnetic induction conductive coil or the like that can achieve the same purpose.

Claims (2)

1. An electric hammer quick-clamping device, which is installed on the hitting head containing the hitting shaft, includes at least two clamping parts, the clamping parts have a clamping position and a loosening position, and it is characterized in that: it also includes a magnetic device, the magnetic device is in the clamping position, the opposite poles are magnetically opposite, and in the release position, the same poles are magnetically opposite, the magnetic device includes magnetic elements respectively arranged on each clamping part , the magnetic element is composed of at least one N-pole magnetic unit and at least one S-pole magnetic unit, the at least one N-pole magnetic unit and the at least one S-pole magnetic unit are arranged side by side, and each adjacent two magnetic The polarity of the unit is reversed. 2. The electric hammer quick clamping device according to claim 1, characterized in that: at the clamping position, the N pole and S pole magnetic units of the magnetic element arranged on at least one of the clamping parts are respectively connected with The S poles and N poles of the magnetic elements arranged on at least one other clamping piece correspond to each other. The units are in one-to-one correspondence with N poles and S poles of the magnetic elements arranged on at least one other clamping piece. 3. The electric hammer quick clamping device according to claim 2, further comprising an outer sleeve, the outer sleeve is movably connected to the striking head. 4. The electric hammer quick-clamping device according to claim 3, characterized in that: an inner sleeve is set inside the outer sleeve, and the at least two clamping parts are radially movable mounted on the inner sleeve , wherein at least one clamping part is fixed in the axial direction of the inner sleeve, at least another clamping part has a first position and a second position in the axial direction of the inner sleeve and can be in the first position and second position. 5. The electric hammer quick clamping device according to claim 4, characterized in that: the outer casing is connected to the at least one other clamping member movable between the first position and the second position. 6. The electric hammer quick clamping device according to claim 4, characterized in that: the front end surface of the outer casing protrudes from the front end surface of the inner casing, and the protrusion distance is not less than the distance between the first position and the second position distance between. 7. The electric hammer quick-clamping device according to claim 4, characterized in that: an elastic device acts on the clamping member to bias it toward the center of the inner casing. 8. The electric hammer quick-clamping device according to any one of claims 3 to 7, characterized in that: the beating head is provided with a device that acts on the outer sleeve and deflects the outer sleeve to the outside of the beating head. Pressed elastic elements. 9. The electric hammer quick clamping device according to claim 1, characterized in that: the magnetic device comprises magnetic elements respectively arranged on each clamping member. 10. The electric hammer quick clamping device according to claim 9, characterized in that: at least one of the at least two clamping parts is connected with a gear structure, and the gear is engaged with the rack. 11. The electric hammer quick-clamping device according to claim 10, characterized in that: said at least two clamping parts are mounted radially movable on an inner sleeve, and said inner sleeve is covered with an outer sleeve , the outer sleeve is connected with the rack. 12. The electric hammer quick clamping device according to claim 11, characterized in that: the front end surface of the outer casing protrudes from the front end surface of the inner casing, and the protrusion distance is sufficient to provide the rack in the axial direction of the casing. distance moved up. 13. The electric hammer quick clamping device according to claim 11, characterized in that: a biasing device acts on the clamping member to bias the center of the inner casing. 14. The electric hammer quick clamping device according to claim 9, characterized in that: the magnetic element and the clamping piece can also be integrated.

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