CN111185627A

CN111185627A - Metal cutting machine

Info

Publication number: CN111185627A
Application number: CN202010072249.9A
Authority: CN
Inventors: 傅晨风
Original assignee: Wuyi County Ruiying Electrical Appliance Co ltd
Current assignee: Wuyi Ruiying Tool Manufacturing Co ltd
Priority date: 2019-01-22
Filing date: 2020-01-21
Publication date: 2020-05-22
Anticipated expiration: 2040-01-21
Also published as: CN111185627B

Abstract

The invention provides a metal cutting machine, and belongs to the technical field of metal processing. It has solved the exposed scheduling problem of saw bit when current cutting machine is out of work. This kind of metal cutting machine includes base and aircraft nose, the aircraft nose passes through pivot and supporting seat pin joint, the aircraft nose include saw bit, saw bit axle, motor, upset arm and fixed guard shield, fixed guard shield and upset arm fixed connection and cover in the upper segment part of saw bit, this metal cutting machine is still including the activity guard shield, this activity guard shield covers in the hypomere part of saw bit, and can rotate around the saw bit axle, is equipped with connecting rod and lower connecting rod between activity guard shield and the supporting seat, the one end and the supporting seat of lower connecting rod rotate to be connected, the other end rotates with the one end of last connecting rod to be connected, the one end of going up the connecting rod rotates to be connected at the skew saw bit axle center position of activity guard shield. When the metal cutting machine does not cut, the movable protective cover and the fixed protective cover form a closed structure, so that the saw blade is prevented from being exposed, and personal injury accidents can be effectively prevented.

Description

Metal cutting machine

Technical Field

The invention belongs to the technical field of metal processing, and relates to a metal cutting machine.

Background

With the development of building material industry, electric cutters in electric tools are widely used for cutting various metal pipes, angle steels, channel steels and various stone plates, so that the electric cutters have a huge market, and therefore, scientific and technological personnel develop various electric cutters.

The upper surface of the saw blade of the electric cutting machine is only fixed with the fixed protective cover, so that hidden dangers exist, on one hand, the lower part of the saw blade of the electric cutting machine is exposed when the electric cutting machine is not used, and thus, an operator or a child can easily contact the saw blade by mistake due to carelessness, and human body injury accidents are caused.

Disclosure of Invention

The invention provides a metal cutting machine which can completely cover a saw blade when the metal cutting machine does not work.

The above object of the present invention is achieved by the following technical solutions:

a metal cutting machine comprises a base and a machine head, wherein a supporting seat is fixedly arranged on the base, the machine head is pivoted with the supporting seat through a pivot, the machine head comprises a saw blade, a saw blade shaft, a motor, an overturning arm and a fixed shield, one end of the overturning arm is pivoted with the supporting seat through the pivot, the motor is fixedly arranged on the overturning arm and used for driving the saw blade shaft, the saw blade is coaxially and fixedly connected with the saw blade shaft, the fixed shield is fixedly connected with the overturning arm and covers the upper section part of the saw blade, the metal cutting machine is characterized by further comprising a movable shield, the movable shield covers the lower section part of the saw blade and can rotate around the saw blade shaft, an upper connecting rod and a lower connecting rod are arranged between the movable shield and the supporting seat, one end of the lower connecting rod is rotatably connected with the supporting seat, the other end of the lower connecting rod is rotatably connected with one end of the upper connecting rod, the, the turning arm or the fixed shield is also fixedly provided with a limiting wheel which is blocked on the path of the turning motion of the lower connecting rod to the base.

In the metal cutting machine, the wheel surface of the limiting wheel is abutted against the outer side surface of the lower connecting rod, the axis of the limiting wheel is parallel to the lower connecting rod, the limiting wheel can be driven to rotate by friction force when the lower connecting rod rotates, and the outline of the lower connecting rod is matched with the limiting wheel and used for controlling the rotation of the movable shield.

In the metal cutting machine, the base is provided with a clamping device for fixing a workpiece, the clamping device comprises a front clamping plate, a rear clamping plate, a clamping plate seat, an adjusting screw rod, a connecting shaft and a mounting seat, the front clamping plate is fixedly arranged on the base through an angle adjusting device, the mounting seat is fixedly connected with the base, the rear clamping plate is fixedly arranged on the clamping plate seat, the base is provided with an adjusting elongated slot, the upper part of the connecting shaft penetrates through the clamping plate seat to be connected with the clamping plate seat in a rotating mode, the lower part of the connecting shaft penetrates through the adjusting elongated slot to enable the clamping plate seat to be connected with the base through the connecting shaft in a sliding mode, the adjusting screw rod penetrates through the mounting seat, one end of the adjusting.

In the metal cutting machine, the mounting seat is rotatably provided with the locking handle, the bottom of the locking handle is provided with an internal thread, and the internal thread is matched with the external thread of the adjusting screw. The locking handle is pressed downwards to enable the adjusting screw rod to be in a pressing and fixing state.

In foretell metal cutting machine, angle adjusting device include pivot, angle adjusting hand wheel and bolt, the front plate rotates through pivot and base to be connected, the bottom surface of front plate seted up with the concentric arc groove of pivot, angle adjusting hand wheel passes arc groove and base fixed connection, the bolt includes bolt axle and bolt cover, the fixed setting of bolt cover is on the front plate, the bolt axle card is established in the bolt cover and can be inserted from top to bottom through the spring, the lower extreme of bolt axle supports and leans on the up end at the base. The front clamping plate can rotate by 0-45 degrees around the rotating shaft to adapt to workpieces at different angles, the angle adjusting hand wheel is loosened, the front clamping plate is enabled to move tightly through the friction force between the bolt shaft and the base during adjustment, and the situation that the adjustment accuracy is not high due to the fact that the gap is too loose is avoided.

In the above metal cutting machine, an angle scale is engraved on the outer side of the arc groove. The angle scale is used for accurately adjusting the angle of the front clamping plate.

In the above metal cutting machine, the rear clamp plate has an M-shaped cross section. When the workpiece to be cut is round or in other non-planar shapes, if the rear clamping plate is a flat plate, the contact area between the rear clamping plate and the workpiece is very small, and loosening and unstable clamping are caused.

In foretell metal cutting machine, the supporting seat on be provided with the resetting means who is used for the upset arm to reset, it includes the torsional spring, the torsional spring cover is established on the pivot, the last torque arm of torsional spring is fixed to be set up on the medial surface of upset arm, supporting seat upper portion set up the standing groove of U type, the lower torque arm of torsional spring is fixed to be set up in above-mentioned standing groove. When the cutting machine is used for working, the overturning arm is pressed downwards by overcoming the spring force of the torsion spring, the overturning arm is loosened after cutting is completed, and the overturning arm returns to the original position through the spring force of the torsion spring.

In the metal cutting machine, the upper connecting rod is arc-shaped and spans the saw blade shaft, and the notch of the upper connecting rod faces the saw blade shaft.

In the metal cutting machine, the upper part of the turnover arm is provided with a cutting handle for holding a hand during cutting, the inner side surface of the cutting handle is provided with a control switch for starting the cutting machine, and the rear part of the turnover arm is provided with a handle for carrying. The control switch is arranged in the cutting handle, so that the cutting machine can be controlled to start and stop at any time, and convenience and safety are realized.

In the above metal cutting machine, a protective cover is fixedly arranged on the upper part of the motor. The protective cover is used for blocking sparks generated during cutting.

Compared with the prior art, when the metal cutting machine does not cut, the movable protective cover and the fixed protective cover form a closed structure, the saw blade is prevented from being exposed, personal injury accidents can be effectively prevented, the front clamping plate can be adjusted within the range of 0-45 degrees through the angle adjusting device to adapt to workpieces at different angles, the turnover arm can be automatically reset through the resetting device, and the working efficiency and the safety guarantee are improved.

Drawings

Fig. 1 is a schematic view of the general structure of the present invention.

FIG. 2 is a schematic view of the mechanism inside the handpiece in the initial position of the present invention

FIG. 3 is a schematic view of the interior of the handpiece of the present invention in an intermediate open position;

FIG. 4 is a schematic view of the interior of the handpiece of the present invention in the lowest cutting position;

FIG. 5 is a schematic view of the construction of the clamping device of the present invention;

FIG. 6 is a schematic structural view of the resetting device of the invention;

FIG. 7 is a schematic view of the construction of the cutting handle and handle of the present invention;

in the figure, 1, a base; 2. a machine head; 3. a supporting seat; 4. a pivot; 5. a saw blade shaft; 6. a motor; 7. a turning arm; 8. fixing the shield; 9. a saw blade; 10. an upper connecting rod; 11. a lower connecting rod; 12. a movable shield; 13. a limiting wheel; 14. a front splint; 15. a rear splint; 16. a clamping plate seat; 17. adjusting the screw rod; 18. a connecting shaft; 19. a mounting seat; 20. adjusting the long groove; 21. an adjusting handle; 22. locking the handle; 23. a rotating shaft; 24. an angle adjusting hand wheel; 25. an arc groove; 26. a latch shaft; 27. a plug sleeve; 28. a torsion spring; 29. cutting the handle; 30. a control switch; 31. a handle; 32. a protective cover; 33. an angle scale.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, a metal cutting machine comprises a base 1 and a machine head 2, wherein the base 1 is fixedly provided with a supporting seat 3, the machine head 2 is pivoted with the supporting seat 3 through a pivot 4, the machine head 2 comprises a saw blade 9, a saw blade shaft 5, a motor 6, a turning arm 7 and a fixed shield 8, one end of the turning arm 7 is pivoted with the supporting seat 3 through the pivot 4, the motor 6 is fixedly arranged on the turning arm 7 and used for driving the saw blade shaft 5, the saw blade 9 is coaxially and fixedly connected with the saw blade shaft 5, and the fixed shield 8 is fixedly connected with the turning arm 7 and covers the upper section of the saw blade 9. The upper part of the motor 6 is fixedly provided with a protective cover 32, and the protective cover 32 is used for blocking sparks generated during cutting.

As shown in fig. 1 to 3, an upper connecting rod 10 and a lower connecting rod 11 are arranged between the movable guard 12 and the supporting base 3, the upper connecting rod 10 is arc-shaped and spans the saw blade shaft 5, the notch of the upper connecting rod 10 faces the saw blade shaft 5, one end of the lower connecting rod 11 is rotatably connected with the supporting base 3, the other end is rotatably connected with one end of the upper connecting rod 10, the other end of the upper connecting rod 10 is rotatably connected with the movable guard 12 which deviates from the center of the saw blade shaft 5, a limiting wheel 13 is further fixedly arranged on the overturning arm 7 or the fixed guard 8, the limiting wheel 13 is blocked on the path of the turning motion of the lower connecting rod 11 to the base 1, the wheel surface of the limiting wheel 13 is propped against the outer side surface of the lower connecting rod 11, the axis of the limiting wheel 13 is parallel to the lower connecting rod 11, when the lower connecting rod 11 rotates, the limiting wheel 13 can be driven to rotate by friction force, and the outline of the lower connecting rod 11 is matched with the limiting wheel 13 and used for controlling the rotation of the movable shield 12.

The convex parts of the lower connecting rod 11 and the limiting wheel 13 are divided into an A-B section and a B-C section, when the limiting wheel 13 is positioned at the point A, the cutting machine is in a non-working state, and the movable shield 12 is in a completely closed state; the turning arm 7 is pressed downwards, and when the limiting wheel 13 moves from the point A to the point B, the movable shield 12 is gradually opened through the connecting rod mechanism, so that a 90-degree cutting opening is formed between the movable shield 12 and the fixed shield 8; the overturning arm 7 is continuously pressed down to the lowest cutting position, so that the limiting wheel 13 moves from the point B to the point C, the included angle of the cutting opening between the movable shield 12 and the fixed shield 8 is 110 degrees, and the rest of the saw blade 9 except the cutting opening is positioned in the shield, so that personal injury accidents can be effectively prevented; after the cutting operation is finished, the turning arm 7 is loosened, and under the action of the resetting device, the cutting machine returns to the original state, namely the limiting wheel 13 moves from the point C to the point A, and at the moment, the movable shield 12 is in a completely closed state.

As shown in fig. 5, the base 1 is provided with a clamping device for fixing a workpiece, which comprises a front clamping plate 14, a rear clamping plate 15, a clamping plate seat 16, an adjusting screw 17, a connecting shaft 18 and a mounting seat 19, the front clamping plate 14 is fixedly arranged on the base 1 through an angle adjusting device, the mounting seat 19 is fixedly connected with the base 1, the rear clamping plate 15 is fixedly arranged on the clamping plate seat 16, the base 1 is provided with an adjusting elongated slot 20, the upper part of the connecting shaft 18 passes through the clamping plate seat 16 to be rotationally connected with the clamping plate seat, the lower part of the connecting shaft 18 passes through the adjusting elongated slot 20, so that the clamping plate seat 16 is slidably connected with the base 1 through the connecting shaft 18, the adjusting screw 17 passes through the mounting seat 19, one end of the adjusting screw is rotationally connected with the connecting shaft 18, the other end of the adjusting screw is fixedly connected with an adjusting handle 21, the mounting seat 19 on rotate and be provided with locking handle 22, the bottom of locking handle 22 is equipped with the internal thread, the external screw thread looks adaptation of internal thread and adjusting screw 17. The locking handle 22 is pressed down to bring the adjusting screw 17 into a tightly fixed state. The cross section of the rear clamping plate 15 is M-shaped, and when the workpiece to be cut is circular or other non-planar, if the rear clamping plate 15 is a flat plate, the contact area between the rear clamping plate 15 and the workpiece is very small, so that looseness and unstable clamping are caused.

Angle adjusting device includes pivot 23, angle adjusting hand wheel 24 and bolt, front plate 14 rotates through pivot 23 and base 1 to be connected, the bottom surface of front plate 14 is seted up with the concentric arc groove 25 of pivot 23, angle adjusting hand wheel 24 passes arc groove 25 and base 1 fixed connection, the bolt includes bolt axle 26 and bolt cover 27, bolt cover 27 is fixed to be set up on front plate 14, bolt axle 26 card is established in bolt cover 27 and can be inserted and pulled from top to bottom through the spring, the lower extreme of bolt axle 26 supports and leans on the up end at base 1. An angle scale 33 is engraved on the outer side of the arc groove 25 and used for accurately adjusting the angle of the front clamping plate 14, the front clamping plate 14 can rotate by 0-45 degrees around the rotating shaft 23 to adapt to workpieces with different angles, the angle adjusting hand wheel 24 is loosened, the front clamping plate 14 is enabled to move tightly through the friction force between the bolt shaft 26 and the base 1 during adjustment, and the situation that the adjustment accuracy is not high due to too loose gaps is avoided.

As shown in fig. 6 and 7, the support base 3 is provided with a reset device for resetting the tilting arm 7, which includes a torsion spring 28, the torsion spring 28 is sleeved on the pivot 4, an upper torsion arm of the torsion spring 28 is fixedly arranged on an inner side surface of the tilting arm 7, the upper portion of the support base 3 is provided with a U-shaped placement groove, and a lower torsion arm of the torsion spring 28 is fixedly arranged in the placement groove. When the cutting machine is used for working, the spring force of the torsion spring 28 is overcome to press the turnover arm 7 downwards, the turnover arm 7 is loosened after cutting is completed, the turnover arm 7 returns to the original position through the spring force of the torsion spring 28, the upper portion of the turnover arm 7 is provided with a cutting handle 29 used for holding a hand during cutting, the inner side face of the cutting handle 29 is provided with a control switch 30 used for starting the cutting machine, and the rear portion of the turnover arm 7 is provided with a handle 31 used for carrying. The control switch 30 is arranged inside the cutting handle 29, can control the cutting machine to start and stop at any time, and is convenient and safe.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended sense, i.e., in a sense equivalent to "including at least … …", and not in a closed sense, i.e., in a sense not to be interpreted as "including only … …".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A metal cutting machine comprises a base (1) and a machine head (2), wherein a supporting seat (3) is fixedly arranged on the base (1), the machine head (2) is pivoted with the supporting seat (3) through a pivot (4), the machine head (2) comprises a saw blade (9), a saw blade shaft (5), a motor (6), a turning arm (7) and a fixed shield (8), one end of the turning arm (7) is pivoted with the supporting seat (3) through the pivot (4), the motor (6) is fixedly arranged on the turning arm (7) and used for driving the saw blade shaft (5), the saw blade (9) is coaxially and fixedly connected with the saw blade shaft (5), the fixed shield (8) is fixedly connected with the turning arm (7) and covers the upper section of the saw blade (9), the metal cutting machine is characterized by further comprising a movable shield (12), and the movable shield (12) covers the lower section of the saw blade (9), the saw blade rotating mechanism can rotate around a saw blade shaft (5), an upper connecting rod (10) and a lower connecting rod (11) are arranged between a movable protective cover (12) and a supporting seat (3), one end of the lower connecting rod (11) is rotatably connected with the supporting seat (3), the other end of the lower connecting rod is rotatably connected with one end of the upper connecting rod (10), the other end of the upper connecting rod (10) is rotatably connected to the position, deviated from the center of the saw blade shaft (5), of the movable protective cover (12), a limiting wheel (13) is fixedly arranged on a turning arm (7) or a fixed protective cover (8), and the limiting wheel (13) is blocked on the path of the turning motion of the lower connecting rod (11) to a base (1.

2. The metal cutting machine according to claim 1, characterized in that the wheel surface of the limiting wheel (13) abuts against the outer side surface of the lower connecting rod (11), the axis of the limiting wheel (13) is parallel to the lower connecting rod (11), the limiting wheel (13) can be driven to rotate by friction force when the lower connecting rod (11) rotates, and the outline of the lower connecting rod (11) is matched with the limiting wheel (13) for controlling the rotation of the movable shield (12).

3. The metal cutting machine according to claim 1, characterized in that the base (1) is provided with a clamping device for fixing a workpiece, the clamping device comprises a front clamping plate (14), a rear clamping plate (15), a clamping plate seat (16), an adjusting screw (17), a connecting shaft (18) and a mounting seat (19), the front clamping plate (14) is fixedly arranged on the base (1) through an angle adjusting device, the mounting seat (19) is fixedly connected with the base (1), the rear clamping plate (15) is fixedly arranged on the clamping plate seat (16), the base (1) is provided with an adjusting elongated slot (20), the upper part of the connecting shaft (18) penetrates through the clamping plate seat (16) to be rotatably connected with the connecting shaft, the lower part of the connecting shaft (18) penetrates through the adjusting elongated slot (20), so that the clamping plate seat (16) is slidably connected with the base (1) through the connecting shaft (18), and the adjusting screw (17) penetrates through the mounting seat (19), one end of the connecting rod is rotatably connected with the connecting shaft (18), and the other end of the connecting rod is fixedly connected with an adjusting handle (21).

4. The metal cutting machine according to claim 3, characterized in that the mounting seat (19) is rotatably provided with a locking handle (22), the bottom of the locking handle (22) is provided with an internal thread, and the internal thread is matched with the external thread of the adjusting screw (17).

5. The metal cutting machine according to claim 3, wherein the angle adjusting device comprises a rotating shaft (23), an angle adjusting hand wheel (24) and a bolt, the front clamping plate (14) is rotatably connected with the base (1) through the rotating shaft (23), an arc groove (25) concentric with the rotating shaft (23) is formed in the bottom surface of the front clamping plate (14), the angle adjusting hand wheel (24) penetrates through the arc groove (25) to be fixedly connected with the base (1), the bolt comprises a bolt shaft (26) and a bolt sleeve (27), the bolt sleeve (27) is fixedly arranged on the front clamping plate (14), the bolt shaft (26) is clamped in the bolt sleeve (27) and can be vertically inserted and pulled out through a spring, and the lower end of the bolt shaft (26) abuts against the upper end face of the base (1).

6. A metal cutting machine according to claim 3, characterized in that the outside of the circular arc groove (25) is engraved with an angle scale (33).

7. A metal cutting machine according to claim 3, characterized in that the cross-sectional shape of the rear clamping plate (15) is M-shaped.

8. The metal cutting machine according to claim 1, wherein the support base (3) is provided with a reset device for resetting the turnover arm (7), the reset device comprises a torsion spring (28), the torsion spring (28) is sleeved on the pivot (4), an upper torsion arm of the torsion spring (28) is fixedly arranged on the inner side surface of the turnover arm (7), the upper portion of the support base (3) is provided with a U-shaped placing groove, and a lower torsion arm of the torsion spring (28) is fixedly arranged in the placing groove.

9. A metal cutting machine according to claim 1, characterized in that the upper link (10) is curved across the blade axle (5), the recess of the upper link (10) facing the blade axle (5).

10. A metal cutting machine according to claim 1, characterized in that the upper part of the turning arm (7) is provided with a cutting handle (29) for gripping parts during cutting, the inner side of the cutting handle (29) is provided with a control switch (30) for starting the cutting machine, and the rear part of the turning arm (7) is provided with a handle (31) for carrying.