CN216464749U - Electric molybdenum wire scissors - Google Patents

Abstract

An electric molybdenum wire shear comprises a shell with a cavity and a through hole, a motor arranged in the cavity, a rotary drum and a first elastic structure, wherein the first elastic structure enables one side edge with a shear blade on a second cutter body to always keep in contact with a first guide surface; the rear end of the first cutter body is inserted in the rotary drum, and the front end of the first cutter body penetrates out of the through hole forwards; the rear portion holding of second cutter body is in the orbit groove, the perforation is worn out forward to the front end, the second cutter body articulates on first cutter body and can open and be closed for first cutter body, first cutter body and second cutter body are opened when having the dislocation of the most inboard of cutting edge and first bellied on the second cutter body and separating, first cutter body and second cutter body are closed when having the most inboard of cutting edge and corresponding and contact on the second cutter body, moreover, the steam generator is simple in structure, be difficult to damage, the running noise is little, and the maintenance cost is low.

Description

Electric molybdenum wire scissors

Technical Field

The utility model relates to the technical field of auxiliary tools of wire cutting machines, in particular to an electric molybdenum wire shear.

Background

The wire cutting machine is controlled by a numerical control machine tool, and performs cutting processing on a workpiece by using pulse discharge between a wire electrode which reciprocates at a high speed and the workpiece. The wire cutting machine mainly adopts molybdenum wires as electrode wires. In the process of wire cutting, the procedures of wire feeding, wire changing, wire winding and the like all involve the cutting of the molybdenum wire. In the prior art, the molybdenum wire is usually sheared by scissors manually, and the shearing mode needs to open and close the cutter body continuously and manually, so that the operation is relatively laborious.

According to the investigation, the Chinese utility model patent with patent number ZL202022202178.8 (No. CN213412058U) discloses an electric scissor machine, which comprises a shell, wherein a motor is fixedly arranged in the shell, a first helical gear is fixedly arranged at the front end of an output shaft of the motor, a second helical gear is meshed with the first helical gear and is rotatably arranged on a fixed seat through a fixed shaft, the fixed seat is fixedly arranged at one side in the shell, a short shaft is fixedly arranged in the middle of one end of the second helical gear, a first connecting rod is rotatably arranged on the short shaft, a second connecting rod is rotatably arranged at the other end of the first connecting rod, a round shaft is arranged at one end of the second connecting rod, the other end of the second connecting rod is in an open shape with the round shaft, an upper cutting edge is cooperatively arranged at the other end of the second connecting rod, a round hole and a groove are arranged in the middle of the inner side of the upper cutting edge, and a lower cutting edge is arranged on the inner side surface of the upper cutting edge, the middle part of the inner side of the lower blade is provided with a round hole and a groove, the middle parts of the upper blade and the lower blade are rotatably arranged on a stud through nuts, and the stud is fixedly arranged on one side inside the shell.

According to the electric scissors machine, one blade is driven by the motor and the gear-connecting rod transmission mechanism to be opened and closed relative to the other blade, so that the scissors can automatically cut, and the cutting operation of the molybdenum wires can be more labor-saving. However, the electric scissors machine realizes transmission through the gear-connecting rod transmission mechanism, the electric scissors machine is complex in structure, multiple in related parts and high in matching precision requirement on each part, and can drive one of the blades to be opened and closed relative to the other blade only by matching and linkage of each part.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide an electric molybdenum wire shear, which has a simple structure, involves few components, is not easy to damage, and has low operation noise and low maintenance cost.

The second technical problem to be solved by the present invention is to provide an electric molybdenum wire shear, which can make two cutter bodies automatically advance when being relatively closed to perform pulse-type shearing on a molybdenum wire, and does not need to continuously apply force to push the electric molybdenum wire shear to advance when an operator shears the molybdenum wire, so that the molybdenum wire shearing operation is more labor-saving.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: an electric molybdenum wire shear comprises a shell which is hollow and provided with a cavity, wherein the front end of the shell is provided with a through hole communicated with the cavity;

the motor is arranged in the cavity;

the method is characterized in that: also comprises

The rotating drum is accommodated in the shell, the rear end of the rotating drum in the axial direction is fixedly connected with the output shaft of the motor and can rotate circumferentially around the axis of the rotating drum, the front end of the rotating drum in the axial direction is recessed backwards to form a track groove, the peripheral wall of the track groove is a first guide surface, and the first guide surface extends inwards along the radial direction of the rotating drum to form a first protrusion;

the rear end of the first cutter body is inserted in the rotary drum, and the front end of the first cutter body penetrates out of the through hole forwards;

the second knife body is provided with a first side and a second side which are oppositely arranged, the cutting edge of the second knife body is arranged on the first side, the rear part of the second knife body is contained in the track groove, the front end of the second knife body penetrates out of the through hole forwards, the second knife body is hinged to the first knife body and can be opened and closed relative to the first knife body, the first side edge of the second knife body is staggered and separated from the innermost side of the first bulge under the opening state of the first knife body and the second knife body, and the first side edge of the second knife body corresponds to and contacts the innermost side of the first bulge under the closing state of the first knife body and the second knife body;

and the first elastic structure is arranged in the cavity and enables the first side edge of the second cutter body to always keep the tendency of contacting with the first guide surface.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: the first knife body can be constrained in the rotary drum in a front-back moving mode and is provided with a front position and a rear position, when the first knife body is located at the front position, the first knife body and the second knife body are in a closed state, and when the first knife body is located at the rear position, the first knife body and the second knife body are in an open state.

In order to drive the first cutter body to move back and forth periodically, a pulse type driving structure for driving the first cutter body to move back and forth is arranged between the first cutter body and the track groove.

In order to make the pulse type driving structure simpler, the first cutter body is provided with a third side and a fourth side which are arranged oppositely, and the cutting edge of the first cutter body is arranged on the third side;

the pulse type driving structure comprises

A second guide surface formed by a rear wall of the track groove, the second guide surface having a second projection extending forward;

the convex part is arranged at the rear end of the third side or the rear end of the fourth side of the first cutter body, when the first cutter body is positioned at the front position, the convex part corresponds to and contacts with the foremost side of the second protrusion, and when the first cutter body is positioned at the rear position, the convex part and the foremost side of the second protrusion are staggered and separated;

and the second elastic structure is arranged in the cavity and enables the end surface of the rear end of the first cutter body to always keep the trend of contacting with the second guide surface.

In order to enable the first cutter body and the second cutter body to advance rapidly when closed so as to enable the impact effect of the molybdenum wire shears to be stronger, and to retreat slowly when the first cutter body and the second cutter body are opened so as to enable the molybdenum wire shears to be stably reset, the second protrusion comprises a first extending section and a second extending section, the first extending section and the second extending section extend forwards gradually and backwards gradually along the rotation direction of the rotary drum, and the foremost side of the second protrusion is positioned at the junction of the first extending section and the second extending section; the length of the first extension is greater than the length of the second extension.

In order to avoid the increase of the processing difficulty of the rotary drum caused by the over-compact of the first protrusion and the second protrusion, the convex part is arranged at the rear end of the third side of the cutter body, and the innermost side of the first protrusion and the foremost side of the second protrusion are respectively positioned at two opposite sides of the axis of the rotary drum. The phrase "opposite sides of the axis of the drum" does not mean that the line between the innermost side of the first projection and the foremost side of the second projection is in the same plane as the axis of the drum, and considering the thickness of the first and second bodies, the line between the innermost side of the first projection and the foremost side of the second projection is slightly offset from the axis of the drum.

In order to make the second elastic structure simpler and more effective, the second elastic structure comprises a swing arm and a spring, the middle part of the swing arm is hinged on the cavity wall of the cavity through a first rotating shaft perpendicular to the axial direction of the rotating cylinder, so that the swing arm can swing back and forth, one end of the swing arm is constrained with the first cutter body, and the spring acts on the other end of the swing arm and makes the other end of the swing arm always have a forward swing tendency.

In order to make the constraint action between the first cutter body and the swing arm stronger, the first cutter body is also provided with a first surface and a second surface which are oppositely arranged, the first surface is close to the second cutter body, and the second surface is far away from the second cutter body; the swing arm is provided with a first clamping part and a second clamping part which are oppositely arranged, a gap is formed between the first clamping part and the second clamping part, the third side of the first cutter body is inserted into the gap, the first clamping part is close to the first surface, and the second clamping part is close to the second surface; an inserting portion is further arranged between the first clamping portion and the second clamping portion, and a slot for inserting the inserting portion is formed in the third side of the first cutter body.

In order to make the first elastic structure simpler, the first elastic structure comprises a supporting shaft arranged on the wall of the cavity and a torsional spring sleeved on the supporting shaft, wherein one end of the torsional spring is abutted against the wall of the cavity, and the other end of the torsional spring is abutted against the second side edge of the second cutter body.

In order to facilitate illumination of wire cutting operation in a dark environment, the front end of the shell is provided with a mounting hole close to the through hole, an illuminating lamp is installed in the mounting hole, a switch penetrates through the front portion of the cavity, a battery is further arranged at the rear portion of the cavity, and the battery, the switch, the illuminating lamp and the motor are electrically connected.

Compared with the prior art, the utility model has the advantages that: the peripheral wall of the track groove of the rotary drum forms a first guide surface with a first protrusion, and one side edge of the second cutter body, which is provided with the cutting edge, is always in contact with the first guide surface, so that the second cutter body can rotate relative to the rotary drum along the first guide surface to realize opening and closing relative to the first cutter body, and because the first guide surface is in direct contact with the second cutter body instead of a transmission mechanism structure, the electric molybdenum wire shear has fewer related parts, simple structure and low operating noise and low maintenance cost, and the transmission between the rotary drum and the second cutter body is not easy to fail, so that the electric molybdenum wire shear is not easy to damage; the electric molybdenum wire shears can enable the two cutter bodies to automatically advance to perform pulse type shearing on the molybdenum wire when the two cutter bodies are relatively closed, continuous force application is not needed when an operator shears the molybdenum wire to push the electric molybdenum wire shears to advance, and the molybdenum wire shearing operation can be more labor-saving.

Drawings

Fig. 1 is a perspective view of the embodiment of the present invention (in a state where the first and second blades are opened);

FIG. 2 is a perspective view of FIG. 1 with the housing removed;

fig. 3 is a perspective view of the embodiment of the present invention (in a state where the first cutter body and the second cutter body are closed);

FIG. 4 is a perspective view of FIG. 3 with the housing removed;

FIG. 5 is a perspective view of a drum according to an embodiment of the present invention;

FIG. 6 is a perspective view of the housing of the embodiment of the present invention;

fig. 7 is a perspective view of the first and second blades in an open state according to the embodiment of the present invention;

fig. 8 is a perspective view of a swing arm according to an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 8, the preferred embodiment of the present invention is shown.

The electric molybdenum wire scissors in the embodiment comprise a shell 1, a motor 2, a rotary drum 3, a first cutter body 4, a second cutter body 5 and a first elastic structure. The housing 1 is hollow and has a cavity 11, and the front end of the housing 1 is provided with a through hole 12 (see fig. 6) communicating with the cavity 11. The motor 2 is disposed in the cavity 11. The drum 3 is accommodated in the housing 1, the axial rear end of the drum 3 is fixedly connected with the output shaft of the motor 2 to be capable of rotating circumferentially around the axis thereof, the axial front end of the drum 3 is recessed rearwards with a track groove 31, the peripheral wall of the track groove 31 is a first guide surface 311, and the first guide surface 311 extends radially inwards along the drum 3 with a first protrusion 312 (see fig. 2, 4 and 5). The rear end of the first blade 4 is inserted into the drum 3, and the front end thereof passes forward through the through hole 12 (see fig. 1 and 3). The second cutter body 5 has a first side 51 and a second side 52 arranged opposite to each other, and the cutting edges 511 of the second cutter body 5 are provided on the first side 51 (see fig. 2 and 7). The rear part of the second knife body 5 is accommodated in the track slot 311, the front end of the second knife body passes through the through hole 12 forwards, and the second knife body 5 is hinged on the first knife body 4 and can be opened and closed relative to the first knife body 4; in the present embodiment, the middle portion of the second cutter body 5 is hinged to the middle portion of the first cutter body 4 through a second rotating shaft 53 perpendicular to the axial direction of the drum 3 (see fig. 7). In the opened state of the first and second bodies 4 and 5, the first side 51 edge of the second body 5 is misaligned with and separated from the innermost side 312a of the first protrusion 312 (see fig. 2 and 5), and in the closed state of the first and second bodies 4 and 5, the first side 51 edge of the second body 5 corresponds to and contacts the innermost side 312a of the first protrusion 312 (see fig. 4 and 5). The first resilient structure is arranged in the cavity 11 and tends to keep the edge of the first side 51 of the second blade 5 in contact with the first guide surface 311 at all times. The first elastic structure includes a supporting shaft 111 (see fig. 6) disposed on the cavity wall of the cavity 11, and a torsion spring 7 sleeved on the supporting shaft 111, wherein one end of the torsion spring 7 abuts against the cavity wall of the cavity 11, and the other end abuts against the edge of the second side 52 of the second knife body 5 (see fig. 2).

In the electric molybdenum wire scissors in the embodiment, because the first guide surface 311 is in direct contact with the second cutter body 5 instead of through a transmission mechanism structure, the electric molybdenum wire scissors have fewer related parts, so that the structure is simpler, and the transmission between the rotary drum 3 and the second cutter body 5 is not easy to fail, so that the electric molybdenum wire scissors are not easy to damage.

The first cutter body 4 is constrained in the rotary drum 3 in a forward-backward moving mode and is provided with a front position and a rear position, when the first cutter body 4 is located at the front position, the first cutter body 4 and the second cutter body 5 are in a closed state, and when the first cutter body 4 is located at the rear position, the first cutter body 4 and the second cutter body 5 are in an open state, so that the two cutter bodies automatically advance to carry out pulse type shearing on the molybdenum wire when being relatively closed, continuous force application by an operator to push the electric molybdenum wire shears to advance is not needed when shearing the molybdenum wire, and the molybdenum wire shearing operation can be more labor-saving.

A pulse type driving structure for driving the first cutter body 4 to move back and forth is arranged between the first cutter body 4 and the track groove 31 so as to drive the first cutter body 4 to move back and forth periodically. The first blade 4 has a third side 41 and a fourth side 42 disposed opposite to each other, and a cutting edge 411 of the first blade 4 is provided on the third side 41 (see fig. 4 and 7). The pulse type driving structure includes a second guide surface 313, a convex portion 412, and a second elastic structure. Wherein the second guide surface 313 is formed by a rear wall of the track groove 31, and the second guide surface 313 extends forward with a second protrusion 314 (see fig. 2 and 4); the innermost side 312a of the first projection 312 and the foremost side 314a of the second projection 314 are located on opposite sides of the axis of the drum 3, respectively (see fig. 5). in the present embodiment, "opposite sides of the axis of the drum 3" does not mean that the line between the innermost side 312a of the first projection 312 and the foremost side 314a of the second projection 314 is on the same plane as the axis of the drum 3. in view of the thickness of the first and second bodies 4 and 5 themselves, the line between the innermost side 312a of the first projection 312 and the foremost side 314a of the second projection 314 is slightly offset from the axis of the drum 3. The protrusion 412 is provided at the rear end of the third side 41 of the first blade 4, the protrusion 412 is corresponding to and contacts the foremost side 314a of the second protrusion 314 when the first blade 4 is in the front position (see fig. 4), and the protrusion 412 is separated from the foremost side 314a of the second protrusion 314 when the first blade 5 is in the rear position (see fig. 2). The second resilient structure is provided in the cavity 11 and tends to keep the rear end face of the first blade body 4 always in contact with the second guide face 313.

In order to make the first knife body 4 and the second knife body 5 advance rapidly when closed to make the impact action of the molybdenum wire shears stronger and retreat slowly when the first knife body 4 and the second knife body 5 are opened to make the molybdenum wire shears return smoothly, as shown in fig. 5, the second protrusion 314 includes a first extension 314b extending forward gradually in the rotation direction of the drum 3 and a second extension 314c extending backward gradually, and the foremost side 314a of the second protrusion 314 is located at the junction of the first extension 314b and the second extension 314 c; the length of the first extension 314b is greater than the length of the second extension 314 c.

The second elastic structure comprises a swing arm 81 and a spring 82, the middle part of the swing arm 81 is hinged on the cavity wall of the cavity 11 through a first rotating shaft 6 perpendicular to the axial direction of the rotating drum 3, so that the swing arm 81 can swing back and forth, one end of the swing arm 81 is restrained with the first cutter body 4, and the spring 82 acts on the other end of the swing arm 81 and enables the other end of the swing arm 81 to always have a forward swing tendency (see fig. 2 and 4). The first tool body 4 also has a first surface 43 and a second surface 44 disposed opposite each other, the first surface 43 being adjacent to the second tool body 5 (see fig. 2) and the second surface 44 being remote from the second tool body 5 (see fig. 4); the swing arm 81 has a first clamping portion 811 and a second clamping portion 812 arranged oppositely, the first clamping portion 811 and the second clamping portion 812 have a gap 813 therebetween (see fig. 8), the third side 41 of the first blade 4 is inserted into the gap 813, the first clamping portion 811 is adjacent to the first surface 43, and the second clamping portion 812 is adjacent to the second surface 44 (see fig. 2 and 4); an insertion portion 814 is further disposed between the first holding portion 811 and the second holding portion 812, and the third side 41 of the first blade 4 is provided with an insertion slot 413 (see fig. 8) for inserting the insertion portion 814.

In order to illuminate the wire cutting operation in dark environment, the front end of the housing 1 is provided with a mounting hole 13 (see fig. 6) close to the through hole 12, an illuminating lamp 91 is installed in the mounting hole 13, a switch 92 (see fig. 1 and 3) is arranged in front of the cavity 11 in a penetrating manner, a battery 93 (see fig. 2 and 4) is further arranged at the rear of the cavity 11, and the battery 93, the switch 92, the illuminating lamp 91 and the motor 2 are electrically connected, so that the switch 92 controls the motor 2 to start and stop, and the illuminating lamp 91 illuminates or not.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. An electric molybdenum wire shear comprises

The device comprises a shell (1) which is hollow and provided with a cavity (11), wherein the front end of the shell (1) is provided with a through hole (12) communicated with the cavity (11);

the motor (2) is arranged in the cavity (11);

the method is characterized in that: also comprises

The rotary drum (3) is accommodated in the shell (1), the axial rear end of the rotary drum (3) is fixedly connected with an output shaft of the motor (2) and can rotate around the axis of the rotary drum in the circumferential direction, the axial front end of the rotary drum (3) is recessed backwards to form a track groove (31), the peripheral wall of the track groove (31) is a first guide surface (311), and the first guide surface (311) extends inwards along the radial direction of the rotary drum (3) to form a first protrusion (312);

the rear end of the first cutter body (4) is inserted into the rotary drum (3), and the front end of the first cutter body penetrates out of the through hole (12) forwards;

a second blade body (5) having a first side (51) and a second side (52) arranged opposite, and the cutting edge (511) of the second cutter body (5) is arranged on the first side (51), the rear part of the second cutter body (5) is contained in the track groove (31), the front end of the second cutter body forwards penetrates out of the through hole (12), the second knife body (5) is hinged to the first knife body (4) and can be opened and closed relative to the first knife body (4), in the state that the first knife body (4) and the second knife body (5) are opened, the edge of the first side (51) of the second knife body (5) is separated from the innermost side (312a) of the first bulge (312) in a staggered way, the edge of the first side (51) of the second knife body (5) corresponds to and contacts the innermost side (312a) of the first protrusion (312) in the closed state of the first and second knife bodies (4, 5);

and a first elastic structure which is arranged in the cavity (11) and enables the edge of the first side (51) of the second cutter body (5) to always keep the tendency of being in contact with the first guide surface (311).

2. The electric molybdenum wire shear of claim 1, wherein: the first cutter body (4) can be constrained in the rotary drum (3) in a front-back moving mode and is provided with a front position and a rear position, when the first cutter body (4) is located at the front position, the first cutter body (4) and the second cutter body (5) are in a closed state, and when the first cutter body (4) is located at the rear position, the first cutter body (4) and the second cutter body (5) are in an open state.

3. The electric molybdenum wire shear of claim 2, wherein: a pulse type driving structure for driving the first cutter body (4) to move back and forth is arranged between the first cutter body (4) and the track groove (31).

4. The electric molybdenum wire shear of claim 3, wherein: the first cutter body (4) is provided with a third side (41) and a fourth side (42) which are oppositely arranged, and the cutting edge (411) of the first cutter body (4) is arranged on the third side (41);

the pulse type driving structure comprises

A second guide surface (313) formed by a rear wall of the track groove (31), the second guide surface (313) having a second protrusion (314) extending forward;

a convex part (412) which is arranged at the rear end of the third side (41) or the rear end of the fourth side (42) of the first cutter body (4), when the first cutter body (4) is positioned at the front position, the convex part (412) is corresponding to and contacted with the foremost side (314a) of the second protrusion (314), when the first cutter body (4) is positioned at the rear position, the convex part (412) is staggered with and separated from the foremost side (314a) of the second protrusion (314);

and a second elastic structure which is provided in the cavity (11) and keeps the rear end surface of the first blade (4) always in contact with the second guide surface (313).

5. The electric molybdenum wire shear of claim 4, wherein: the second projection (314) comprises a first extension (314b) extending gradually forward and a second extension (314c) extending gradually backward in the direction of rotation of the drum (3), and the foremost side (314a) of the second projection (314) is located at the intersection of the first extension (314b) and the second extension (314 c); the first extension (314b) has a length greater than a length of the second extension (314 c).

6. The electric molybdenum wire shear of claim 4, wherein: the convex part (412) is arranged at the rear end of the third side (41) of the cutter body, and the innermost side (312a) of the first bulge (312) and the foremost side (314a) of the second bulge (314) are respectively positioned at two opposite sides of the axis of the rotary drum (3).

7. The electric molybdenum wire shear of claim 4, wherein: the second elastic structure comprises a swing arm (81) and a spring (82), the middle part of the swing arm (81) is hinged to the cavity wall of the cavity (11) through a first rotating shaft (6) perpendicular to the axial direction of the rotary drum (3) so that the swing arm (81) can swing back and forth, one end of the swing arm (81) is constrained with the first cutter body (4), and the spring (82) acts on the other end of the swing arm (81) and enables the other end of the swing arm (81) to always have a forward swing trend.

8. The electric molybdenum wire shear of claim 7, wherein: the first cutter body (4) is also provided with a first surface (43) and a second surface (44) which are oppositely arranged, the first surface (43) is close to the second cutter body (5), and the second surface (44) is far away from the second cutter body (5); the swing arm (81) is provided with a first clamping part (811) and a second clamping part (812) which are oppositely arranged, a gap (813) is formed between the first clamping part (811) and the second clamping part (812), the third side (41) of the first cutter body (4) is inserted into the gap (813), the first clamping part (811) is close to the first surface (43), and the second clamping part (812) is close to the second surface (44); an inserting portion (814) is further arranged between the first clamping portion (811) and the second clamping portion (812), and an inserting groove (413) for inserting and matching the inserting portion (814) is formed in the third side (41) of the first cutter body (4).

9. An electric molybdenum wire cutter according to any one of claims 1 to 8, wherein: the first elastic structure comprises a supporting shaft (111) arranged on the cavity wall of the cavity (11) and a torsion spring (7) sleeved on the supporting shaft (111), one end of the torsion spring (7) is abutted against the cavity wall of the cavity (11), and the other end of the torsion spring is abutted against the edge of the second side (52) of the second cutter body (5).

10. An electric molybdenum wire cutter according to any one of claims 1 to 8, wherein: the front end of casing (1) is equipped with and is close to mounting hole (13) of perforation (12), installs light (91) in this mounting hole (13), cavity (11) front portion is worn to be equipped with switch (92), cavity (11) rear portion still is equipped with battery (93), this battery (93) switch (92) light (91) with motor (2) electricity is connected.

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