CN110744132B

CN110744132B - Electric cutting machine

Info

Publication number: CN110744132B
Application number: CN201911074759.3A
Authority: CN
Inventors: 陈剑利
Original assignee: Guangzhou Yihai Catering Equipment Co ltd
Current assignee: Guangzhou Yihai Catering Equipment Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2024-06-07
Anticipated expiration: 2039-11-06
Also published as: CN110744132A

Abstract

The invention discloses an electric cutting machine, which structurally comprises a supporting rod, wherein a first connecting rod is arranged on the supporting rod, a rotatable handle is connected to the first connecting rod, a protective cover is arranged on one side of the middle of the supporting rod, a saw blade is arranged in the protective cover, a speed changing mechanism capable of adjusting output rotating speed is arranged on the other side of the middle of the supporting rod, the speed changing mechanism is connected with the saw blade, a supporting block is arranged at the lower end of the supporting rod, the supporting rod can rotate within a certain angle under the limit of the supporting block, a limit switch capable of fixing the supporting rod is arranged in the supporting block, the other end of the supporting block is connected with a base, a supporting seat capable of limiting the supporting block to rotate within a certain angle is arranged on one side of the base, and a clamping mechanism and a fastening mechanism for clamping a workpiece are further arranged on the base: the invention can control the rotating speed of the saw blade, can not greatly reduce the cutting quality when facing materials with different hardness, can adjust the included angle between the saw blade and the horizontal plane in a certain range, can adapt to different cutting requirements, and improves the practicability.

Description

Electric cutting machine

Technical Field

The invention belongs to the field of hardware, relates to hardware tools, and particularly relates to an electric cutting machine.

Background

The electric cutting machine mainly drives the saw blade to rotate at a high speed to cut a workpiece through the motor, but the electric cutting machine is not wide in application range due to the fact that the electric cutting machine is fixed in structural arrangement, and cannot meet cutting requirements under all conditions. For this reason, long-term searches have been conducted, and various solutions have been proposed.

For example, chinese patent literature discloses a metal cutting machine [ application number: CN201510001880.9] comprising a base having an upper surface defining a main support surface for supporting a workpiece to be cut, a clamping device for clamping the workpiece to be cut, mounted to the base, a grinding wheel for cutting the workpiece to be cut, and an auxiliary support mechanism connected to at least one of the clamping device and the base, the auxiliary support mechanism comprising a first auxiliary support element defining a first auxiliary support surface disposed above the base. The metal cutting machine effectively improves the utilization rate of the grinding wheel and reduces waste.

The cutting angle of the scheme grinding wheel is fixed, the function of bevel angle cutting cannot be provided, the scheme grinding wheel is not applicable to the cutting condition with angle requirements, and meanwhile, the condition of unstable clamping can occur when an irregular workpiece is clamped.

Disclosure of Invention

The invention aims to solve the problems, and provides an electric cutting machine which can adjust the angle between a saw blade and a horizontal plane, can adjust the rotation speed of the saw blade, can clamp materials with different shapes, improves the cutting range of the materials and improves the applicability.

In order to achieve the above purpose, the present invention adopts the following technical scheme: this electric cutting machine includes branch, its characterized in that: the novel clamping mechanism comprises a supporting rod, a first connecting rod is arranged at the top end of the supporting rod, a handle is arranged at the other end of the first connecting rod, the handle is rotatably connected with the first connecting rod through a bearing, a protective cover is arranged on one side in the middle of the supporting rod, a saw blade is arranged inside the protective cover, a gearbox is arranged on the other side in the middle of the supporting rod, a power mechanism is arranged inside the gearbox and connected with a speed changing mechanism capable of adjusting output rotating speed, the other end of the speed changing mechanism stretches into the protective cover and is connected with the saw blade, a supporting block is arranged at the lower end of the supporting rod, the supporting rod is rotatably connected with the supporting block through a first bolt, a limit switch capable of preventing the supporting rod from rotating automatically under a non-working state is arranged between the supporting block and the supporting rod, a supporting seat is arranged at one end of the supporting seat, a first cavity is arranged at one end of the supporting seat, the first cavity is connected with the supporting seat, one side of the supporting block is arranged inside the first cavity and is in clearance fit, the lower end of the supporting block can rotate in the first cavity, a supporting block is arranged in the supporting block and can be fixed on the first cavity, a plurality of clamping mechanism are fixedly clamped on the first base and can be fixedly clamped with the same number as the base.

The invention creatively designs the speed change mechanism, can simply control the rotating speed of the saw blade, still can not reduce the cutting quality when facing materials with different hardness, the supporting block can adjust the angle between the saw blade and the horizontal plane under the control of the fixing mechanism, can adapt to different cutting requirements, and the clamping mechanism and the fastening mechanism can stably fix materials with different shapes on the base, thereby improving the application range of the invention.

In the electric cutting machine, the power mechanism comprises a motor, the motor is arranged on the inner wall of the gearbox, the motor is provided with a driving shaft, the driving shaft is rotatably connected with the gearbox through a first bearing, the middle end of the driving shaft is provided with a first main gear, the first main gear is screwed with the driving shaft, the other end of the driving shaft is provided with a second main gear, and the second main gear is screwed with the driving shaft.

In the electric cutting machine, the speed change mechanism comprises a first pinion, the first pinion is meshed with the first main gear, a driven shaft is arranged in the first pinion, the driven shaft is rotatably connected with the supporting rod through a second bearing, the first pinion is rotatably connected with the driven shaft through a third bearing, the middle end of the driven shaft is provided with a second pinion, the second pinion is meshed with the second main gear, the second pinion is rotatably connected with the driven shaft through a fourth bearing, a key groove is formed in the position between the first pinion and the second pinion, a power wheel is arranged at the outer end of the key groove, a key is arranged in the power wheel, the key can slide in the key groove, when the power wheel moves leftwards, the power wheel contacts the second pinion, the left end of the power wheel is meshed with the right end of the second pinion, when the power wheel moves rightwards, the power wheel contacts the first pinion, the right end of the power wheel is meshed with the first pinion, a key groove is formed in the position between the left end of the power wheel and the driven shaft, a sleeve ring is arranged at the outer end of the driven shaft, the sleeve ring is arranged on the power wheel is meshed with the left end of the power wheel, the sleeve ring is arranged on the power wheel, the sleeve is arranged on the surface of the power wheel is in the saw blade, the saw blade is extended to the saw blade, and the saw blade is provided with an opening, the saw blade is arranged on the saw blade opening, and the saw blade is arranged on the saw blade.

In the above-mentioned electric cutting machine, the supporting shoe includes the rotator, the rotator upper end is equipped with the spacing groove, branch through bolt one with the spacing groove rotatable coupling, the rotator left end is located inside the base, be equipped with the cavity in the rotator, be equipped with fixed establishment in the cavity, fixed establishment includes the semicircle body, semicircle body with be equipped with the spring between the cavity inner wall, semicircle body right-hand member is equipped with connecting rod two, connecting rod two is located in the cavity, connecting rod two other ends stretch out rotator right-hand member upper surface and be equipped with the knob, works as when the knob is not atress, semicircle body is hugged closely the cavity inner wall, works as when the knob receives external force to press, semicircle body is kept away from the cavity inner wall.

In the above-mentioned electric cutting machine, be equipped with recess one in the spacing groove, limit switch includes the fixture block, the front side the fixture block middle-end pass through the bolt with recess one rotatable coupling, the fixture block right-hand member is equipped with magnet one, the fixture block right-hand member is equipped with magnet three, recess one front side inner wall evenly is equipped with magnet two and magnet four, magnet one with magnet two will attract each other when being close to, magnet three with magnet four will attract each other when being close to, when the branch is in steady state, the fixture block right-hand member is tightly pasted recess one inboard, the fixture block left end is kept away from recess one inboard, the fixture block left end is located the branch left end, the fixture block right-hand member is located the branch right-hand member, the fixture block right-hand member front surface is tightly pasted recess one inboard, magnet one with magnet two are mutually pasted, magnet three with magnet four are mutually separated, the branch is fixed in the spacing inslot, when the branch is in steady state, the motion state is in the recess one is kept away from each other with magnet one, the fixture block right-hand member is kept away from recess one.

In the above-mentioned electric cutting machine, the base includes cavity one, cavity one locates the supporting seat left end, be equipped with in the cavity one the rotator, be equipped with the working channel in the middle of the base, both sides are equipped with the recess around the base up end, both ends are equipped with spout one around the base, spout one upper end is equipped with spout two, working channel inner wall upper end is equipped with clamping mechanism, clamping mechanism extends to spout one with spout two, the base left end is equipped with two fastening mechanism that evenly place.

In the above electric cutting machine, the clamping mechanism comprises a clamping plate, sliding blocks are arranged at the front end and the rear end of the clamping plate, the sliding blocks are arranged in the first sliding grooves, the sliding blocks are fixed in the first sliding grooves through second bolts, the second bolts extend to the upper end of the base through second sliding grooves, and the second bolts are fixed in the second sliding grooves through nuts. The fastening mechanism comprises a transmission shaft, a plurality of shells are connected to the transmission shaft, the transmission shaft is rotatably connected with the shells through a bearing five and a bearing six, the shells are arranged on the base, rollers are arranged in the shells, the rollers are screwed with the transmission shaft through threads, elastic bands are arranged on the rollers, one ends of the elastic bands are fixed on the rollers and are wound for a plurality of circles, the other ends of the elastic bands extend out of the shells and are provided with clamping pieces, when the fastening mechanism is in a fixed state, the clamping pieces are clamped into the clamping grooves, a ratchet is arranged on the transmission shaft, one end of the ratchet is provided with a pawl, the other end of the pawl is rotatably connected with the base through a bolt three, a knob is arranged at one end of the transmission shaft, and the knob is screwed with the transmission shaft through threads.

Compared with the prior art, the invention has the advantages that:

1. The speed change mechanism can control the rotating speed of the saw blade, can select two speeds, and can not greatly reduce the cutting quality when facing materials with different hardness, so that the speed change mechanism can meet more cutting requirements.

2. The fixing mechanism can stably fix the rotating body in the first cavity, when the cutting angle of the saw blade is required to be adjusted, the rotating body and the first cavity can be in a mutually rotatable state only by pressing the round button on the fixing mechanism, so that the angle between the saw blade and the horizontal plane can be adjusted through the rotating body, and meanwhile, under the limit of the supporting seat on the rotating body, the included angle between the saw blade and the horizontal plane can only be adjusted within the range of 0-90 degrees, so that the cutting mechanism can adapt to different cutting requirements, and the practicability of the cutting mechanism is improved.

3. The limit switch can effectively prevent the support rod from rotating automatically under the non-working condition, so that the safety of the limit switch is improved, and meanwhile, the use method of the limit switch is simple, and the limit switch can be opened only by increasing the force used when the support rod is rotated.

4. The clamping mechanism and the fastening mechanism not only can fix common rotating bodies and cuboid materials on the base, but also can stably fix materials with different shapes on the base, thereby improving the application range of the invention.

5. The clamping mechanism is arranged in the working groove, so that the stress area between the clamping mechanism and the material can be increased under the condition that the operation of the saw blade is not influenced, the clamping effect of the clamping mechanism is enhanced, and the stability of the clamping mechanism is improved.

Drawings

Fig. 1 is a front view of an electric cutter provided by the present invention.

Fig. 2 is a right side view of the electric cutter provided by the present invention.

Fig. 3 is a top view of the electric cutter base provided by the invention.

Fig. 4 is a half-sectional view of the speed change mechanism of the electric cutting machine.

Fig. 5 is a schematic diagram of connection relation of a limit switch of an electric cutting machine.

FIG. 6 is a view of the interface A-A of the electric cutter of FIG. 3 provided by the present invention.

Fig. 7 is a schematic diagram of a ratchet connection relationship of an electric cutter according to the present invention.

Fig. 8 is a half-sectional view of the interface B of the electric cutter of fig. 1 provided by the present invention.

Fig. 9 is a half cross-sectional view of the interface of the electric cutter C of fig. 3 provided by the present invention.

In the figure, 1, a supporting rod; 2. a first connecting rod; 3. a handle; 4. a protective cover; 5. a saw blade; 6. a gearbox; 7. an opening; 10. a power mechanism; 11. a motor; 12. a driving shaft; 13. a primary gear I; 14. a second main gear; 20. a speed change mechanism; 21. a first pinion gear; 22. a driven shaft; 22a, keyways; 23. a second pinion gear; 24. a power wheel; 24a, a bond; 25. a collar; 26. a push rod; 30. a support block; 31. a rotating body; 31a, cavity; 32. a limit groove; 33. a first bolt; 34. a groove I; 40. a base; 41. a first cavity; 43. a working groove; 44. a first chute; 45. a support base; 46. a recess; 47. a second chute; 50. a clamping mechanism; 51. a clamping plate; 52. a slide block; 53. a second bolt; 54. a nut; 60. a housing; 61. an elastic band; 62. a clamping piece; 63. a roller; 64. a transmission shaft; 64a, a knob; 65. a ratchet wheel; 66. a pawl; 67. a third bolt; 68. a clamping groove; 69. a fastening mechanism; 70. a fixing mechanism; 71. a semicircle; 72. a spring; 73. a second connecting rod; 74. a round button; 80. a limit switch; 81. a clamping block; 82. a first magnetic block; 83. a second magnetic block; 84. a bump; 85. a magnetic block III; 86. a magnetic block IV; 87. a bolt; 100. a first bearing; 101. a second bearing; 102. a third bearing; 103. a bearing IV; 104. a fifth bearing; 105. a bearing six; D. cylindrical workpiece to be cut.

Description of the embodiments

As shown in fig. 1, 2 and 3, the electric cutting machine of the invention comprises a supporting rod, the top end of the supporting rod 1 is provided with a connecting rod 1, the other end of the connecting rod 2 is provided with a handle 3, the handle 3 is rotatably connected with the connecting rod 2 through a bearing, one side in the middle of the supporting rod 1 is provided with a protective cover 4, the interior of the protective cover 4 is provided with a saw blade 5, the other side in the middle of the supporting rod 1 is provided with a gearbox 6, the interior of the gearbox 6 is provided with a power mechanism 10, the power mechanism 10 is connected with a speed change mechanism 20 capable of adjusting the output rotating speed, the other end of the speed change mechanism 20 extends into the protective cover 4 and is connected with the saw blade 5, the lower end of the supporting rod 1 is provided with a supporting block 30, the supporting rod 1 is rotatably connected with the supporting block 30 through a bolt 33, a limit switch 80 capable of preventing the supporting rod 1 from rotating automatically in a non-working state is arranged between the supporting block 30 and the supporting rod 1, the lower extreme of supporting shoe 30 is equipped with supporting seat 45, supporting seat 45 one end is equipped with base 40, base 40 one end is equipped with cavity one 41, cavity one 41 links to each other with supporting seat 45, supporting shoe 30 lower extreme one side is located cavity one 41 inside and be clearance fit, supporting shoe 30 lower extreme can rotate in cavity one 41, be equipped with the fixed establishment 70 that can fix supporting shoe 30 in cavity one 41 inside in the supporting shoe 30, be equipped with clamping mechanism 50 on the base 40, be equipped with a plurality of draw-in grooves 68 around the upper surface of base 40 one end, the base 40 other end is equipped with the fastening mechanism 69 the same with draw-in groove 68 quantity, clamping mechanism can be fixed in flat class material on the base, the fastening mechanism cooperation draw-in groove uses can be fixed in cylinder and irregular material on the base.

As shown in fig. 2, the power mechanism 10 includes a motor 11, the motor 11 is disposed at the right end of the inner wall of the gearbox 6, the motor 11 is provided with a driving shaft 12, the driving shaft 12 is rotatably connected with the gearbox 6 through a bearing one 100, a driving gear one 13 is disposed at the middle end of the driving shaft 12, the driving gear one 13 is screwed with the driving shaft 12, a driving gear two 14 is disposed at the left end of the driving shaft 12, and the driving gear two 14 is screwed with the driving shaft 12.

As shown in fig. 2 and 4, the speed change mechanism 20 includes a first pinion 21, the first pinion 21 is engaged with the first pinion 13, a driven shaft 22 is provided inside the first pinion 21, the driven shaft 22 is rotatably connected with the strut 1 through a second bearing 101, the first pinion 21 is rotatably connected with the driven shaft 22 through a third bearing 102, a second pinion 23 is provided at the middle end of the driven shaft 22, the second pinion 23 is engaged with the second pinion 14, the second pinion 23 is rotatably connected with the driven shaft 22 through a fourth bearing 103, a key slot 22a is provided at the position of the driven shaft 22 between the first pinion 21 and the second pinion 23, a power wheel 24 is provided at the outer end of the key slot 22a, a key 24a is provided inside the power wheel 24, the key 24a is provided in the key slot 22a, the key 24a is slidable in the key slot 22a, when the power wheel 24 moves leftwards, the power wheel 24 contacts the second pinion 23, when the power wheel 24 moves rightwards, the power wheel 24 contacts the first auxiliary gear 21, the right end of the power wheel 24 is meshed with the left end of the first auxiliary gear 21, a lantern ring 25 is arranged on the surface of the power wheel 24, a push rod 26 is arranged at the upper end of the lantern ring 25, an opening 7 is arranged at the upper end of the gearbox 6, the upper end of the push rod 26 extends out of the gearbox 6 through the opening 7, the other end of the driven shaft 22 extends into the protective cover 4 and is provided with a saw blade 5, the saw blade 5 is screwed with the driven shaft 22, the push rod 26 is pushed to move leftwards and rightwards so as to control the power wheel 24 to move leftwards and rightwards, the power wheel 24 can be controlled to be meshed with the first auxiliary gear 21 or the second auxiliary gear 23 according to actual conditions, and the rotating speed generated by the power wheel 24 when meshed with the first auxiliary gear 21 is larger than the rotating speed generated by the saw blade 5 when the power wheel 24 meshed with the second auxiliary gear 23, so as to adjust the rotating speed of the saw blade 5.

As shown in fig. 2 and 8, the supporting block 30 includes a rotating body 31, a limit groove 32 is disposed at the upper end of the rotating body 31, the supporting rod 1 is rotatably connected with the limit groove 32 through a first bolt 33, and under the condition that the first bolt 33 is screwed, friction force is generated between the supporting rod 1 and the limit groove 32, so that the supporting rod 1 can rotate in the limit groove 32 but not rotate due to self weight under the condition of applying force, the left end of the rotating body 31 is disposed in the base 40, a cavity 31a is disposed in the rotating body 31, a fixing mechanism 70 is disposed in the cavity 31a, the fixing mechanism 70 includes a semicircle 71, a spring 72 is disposed between the semicircle 71 and the inner wall of the cavity 31a, a second connecting rod 73 is disposed in the cavity 31a, the other end of the second connecting rod 73 extends out of the upper surface of the right end of the rotating body 31 and is provided with a round button 74, the rotating body 31 is fixed on the inner wall of the cavity 31a under the friction force generated by the semicircle 71 and the cavity 31a, when the round button 74 is pressed by external force, the semicircle 71 is far away from the inner wall of the cavity 31a, the rotating body 31 can rotate on a vertical plane in the cavity 31, and the rotation of the rotating body on the support seat can be limited within a rotation angle of only about 45 ° from 31.

As shown in fig. 2 and 5, a first groove 34 is arranged in the limit groove 32, the limit switch 80 is divided into a front part and a rear part, the front part and the rear part are in a mirror image relationship by taking the center of the limit switch 80 as an axis, the limit switch 80 comprises a clamping block 81, the middle end of the front clamping block 81 is rotatably connected with the first groove 34 through a bolt 87, the upper end and the lower end of the clamping block 81 are contacted with the first groove 34, the right end of the clamping block 81 is provided with a first magnetic block 82, the left end of the clamping block 81 is provided with a third magnetic block 85, the inner wall of the front side of the first groove 34 is uniformly provided with a second magnetic block 83 and a fourth magnetic block 86, the first magnetic block 82 and the second magnetic block 83 are mutually attracted when being close, when the support rod 1 is in a stable state, the right end of the clamping block 81 is tightly attached to the inner side of the first groove 34, the left end of the clamping block 81 is far away from the inner side of the first groove 34, the left end of the clamping block 81 is located at the left end of the support rod 1, the right end of the clamping block 81 is located at the right end of the support rod 1, the front surface of the right end of the clamping block 81 is tightly attached to the inner side of the first groove 34, the first magnetic block 82 and the second magnetic block 83 are mutually attached, the third magnetic block 85 and the fourth magnetic block 86 are mutually separated, the support rod 1 is fixed in the first groove 34 by the clamping block 81, when the support rod 1 is in a moving state, the left end of the clamping block 81 is tightly attached to the inner side of the first groove 34, the right end of the clamping block 81 is far away from the inner side of the first groove 34, the first magnetic block 82 and the second magnetic block 83 are mutually separated, and the third magnetic block 85 and the fourth magnetic block 86 are mutually attached.

As shown in fig. 1,3 and 6, the base 40 includes a first cavity 41, the first cavity 41 is disposed at the left end of the supporting seat 45, the rotating body 31 is disposed in the first cavity 41, the working groove 43 is disposed in the middle of the base 40, the recesses 46 are disposed at the front and rear sides of the upper end surface of the base 40, the first sliding groove 44 is disposed at the front and rear ends of the base 40, the second sliding groove 47 is disposed at the upper end of the first sliding groove 44, the clamping mechanism 50 is disposed at the upper end of the inner wall of the working groove 43, the clamping mechanism 50 extends to the first sliding groove 44 and the second sliding groove 47, two uniformly disposed fastening mechanisms 69 are disposed at the left end of the base 40, the clamping mechanism 50 includes a clamping plate 51, the front and rear ends of the clamping plate 51 are provided with sliding blocks 52, the sliding blocks 52 are disposed in the first sliding groove 44, the sliding blocks 52 are fixed in the first sliding groove 44 through the second sliding blocks 53, the second sliding blocks 53 extend to the upper end of the base 40 through the second sliding grooves 47, the sliding blocks 53 are fixed in the second sliding grooves 47 through nuts 54, when the second sliding blocks 53 are loose, and when the second sliding blocks 53 are screwed tightly in the first sliding grooves 44, flat workpieces can be fixed in the first sliding grooves 44.

As shown in fig. 1, 3 and 7, the fastening mechanism 69 includes a transmission shaft 64, a plurality of housings 60 are connected to the transmission shaft 64, the transmission shaft 64 is rotatably connected to the housings 60 through a bearing five 104 and a bearing six 105, the housings 60 are provided on the base 40, rollers 63 are provided in the housings 60, the rollers 63 are screwed to the transmission shaft 64, elastic belts 61 are provided on the rollers 63, one ends of the elastic belts 61 are fixed on the rollers 63 and wound several times, the other ends of the elastic belts 61 extend out of the housings 60 and are provided with a clamping piece 62, when the fastening mechanism 69 is in a fixed state, the clamping piece 62 is clamped into a clamping groove 68, a ratchet 65 is provided on the transmission shaft 64, one end of the ratchet 65 is provided with a pawl 66, the other end of the pawl 66 is rotatably connected to the base 40 through a bolt three 67, a knob 64a is provided on one end of the transmission shaft 64, the knob 64a is screwed to the transmission shaft 64, the knob 64a can tighten and loosen the elastic belts 61, and the ratchet 65 can be clamped when the pawl 66 falls down, so that the elastic belts 61 can maintain the tightened state.

The specific operation mode of the specific embodiment of the invention is as follows: when the workpiece to be cut is cylindrical, the cylindrical workpiece D to be cut is placed in the recess 46, the pawl 66 rotates clockwise to leave the ratchet 65, the elastic band 61 is placed at the upper end of the cylindrical workpiece D to be cut, the clamping piece 62 is clamped into the clamping groove 68, the knob 64a is rotated to rotate the roller 63, the elastic band 61 is tightened, and then the pawl 66 is rotated to clamp into the ratchet 65, so that the elastic band 61 is kept in a tight state, and the cylindrical workpiece D to be cut is fixed. When the workpiece to be cut is flat, the workpiece is placed in the working groove 43, the nut 54 is rotated to loosen the bolt 53, the clamping plate 51 is pushed to enable the sliding block 52 to slide in the first sliding groove 44 until the clamping plate 51 clamps the workpiece to be cut on the right inner wall of the working groove 43, then the nut 54 is rotated to enable the bolt 53 to be fastened, the clamping plate 51 is fixed in the working groove 43, and then the workpiece to be cut is fixed in the working groove 43. By pressing the knob 74 to move the semicircular body 71 away from the inner wall of the cavity 41, the angle between the saw blade 5 and the horizontal plane can be adjusted by rotating the rotating body 31, so that the cutting angle of the saw blade 5 can be adjusted, and by loosening the knob 74, the semicircular body 71 is tightly attached to the inner wall of the cavity 41 under the elasticity of the spring 72, and the friction force generated between the semicircular body 71 and the inner wall of the cavity 41 can prevent the rotating body 31 from rotating. The motor 11 is externally powered, the motor 11 is started, the driving shaft 12 starts to rotate, the driving shaft 12 drives the primary gear 13 and the primary gear 14 to rotate, the primary gear 13 drives the secondary gear 21 to rotate, the primary gear 14 drives the secondary gear 23 to rotate, the push rod 26 is pushed to move left at the moment, the lantern ring 25 under the push rod 26 pushes the power wheel 24 to move forward, the left end of the power wheel 24 is meshed with the secondary gear 23, the power wheel 24 starts to rotate, the key 24a in the power wheel 24 is positioned in the key slot 22a, the power wheel 24 drives the driven shaft 22 to rotate, the driven shaft 22 drives the saw blade 5 to rotate, and if a higher rotating speed is required, the push rod 26 is pushed to move right, and the right end of the power wheel 24 is meshed with the secondary gear 21 to provide a higher rotating speed for the saw blade 5. When the handle 3 is grasped, the supporting rod 1 is pushed to rotate anticlockwise around the limit groove 32, when the supporting rod 1 moves, the left end of the supporting rod 1 pushes away the limit of the clamping block 81, the clamping block 81 is changed from a state that the right end is clung to the inner side of the groove I34, the magnetic block I82 is clung to the magnetic block II 83, the left end is clung to the inner side of the groove I34, the magnetic block III 85 is clung to the magnetic block IV 86, the supporting rod 1 is continuously pushed to rotate, the saw blade 5 is contacted with a workpiece to be cut, the cutting action is started, and the supporting rod 1 is pushed to rotate clockwise after the cutting action is completed until the supporting rod 1 is clamped into the clamping block 81 again.

The specific embodiments described herein are offered by way of example only. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms strut, opening, power mechanism, transmission, primary gear, secondary gear, push rod, support block, collar, recess, support seat, overtime, roller, semicircle, knob, latch, magnet, cavity, etc. are used more herein, the possibility of using other terms is not precluded. These terms are only used to more conveniently describe and explain the nature of the invention and should be construed in a manner consistent with their spirit and scope.

Claims

1. The utility model provides an electric cutting machine, includes branch (1), branch (1) top is equipped with connecting rod one (2), connecting rod one (2) other end is equipped with handle (3), handle (3) through the bearing with connecting rod one (2) rotatable coupling, one side is equipped with protection casing (4) in the middle of branch (1), protection casing (4) inside is equipped with saw bit (5), the opposite side is equipped with gearbox (6) in the middle of branch (1), the inside power mechanism (10) that are equipped with of gearbox (6), power mechanism (10) are connected with variable speed mechanism (20) that can adjust output rotational speed, the variable speed mechanism (20) other end stretches into protection casing (4) and with saw bit (5) link to each other, branch (1) lower extreme is equipped with supporting shoe (30), branch (1) through bolt one (33) with supporting shoe (30) rotatable coupling, be equipped with between supporting shoe (30) with can prevent branch (1) under non-operating condition restriction switch (80) by oneself, its one end is equipped with base (45), the first cavity (41) is connected with the supporting seat (45), one side of the lower end of the supporting block (30) is arranged in the first cavity (41) and is in clearance fit, the lower end of the supporting block (30) can rotate in the first cavity (41), a fixing mechanism (70) which can fix the supporting block (30) in the first cavity (41) is arranged in the supporting block (30), a clamping mechanism (50) is arranged on the base (40), a plurality of clamping grooves (68) are formed in front of and behind the upper surface of one end of the base (40), and fastening mechanisms (69) with the same number as the clamping grooves (68) are arranged at the other end of the base (40);

The power mechanism (10) comprises a motor (11), the motor (11) is arranged on the inner wall of the gearbox (6), the motor (11) is provided with a driving shaft (12), the driving shaft (12) is rotatably connected with the gearbox (6) through a first bearing (100), a first main gear (13) is arranged at the middle end of the driving shaft (12), the first main gear (13) is screwed with the driving shaft (12), a second main gear (14) is arranged at the other end of the driving shaft (12), and the second main gear (14) is screwed with the driving shaft (12);

The speed change mechanism (20) comprises a first pinion (21), the first pinion (21) is meshed with the first main gear (13), a driven shaft (22) is arranged in the first pinion (21), the driven shaft (22) is rotatably connected with the supporting rod (1) through a second bearing (101), the first pinion (21) is rotatably connected with the driven shaft (22) through a third bearing (102), a second pinion (23) is arranged at the middle end of the driven shaft (22), the second pinion (23) is meshed with the second main gear (14), the second pinion (23) is rotatably connected with the driven shaft (22) through a fourth bearing (103), a key groove (22 a) is arranged at a position between the first pinion (21) and the second pinion (23), a power wheel (24) is arranged at the outer end of the key groove (22 a), a key (24 a) is arranged in the power wheel (24), the key (24 a) is arranged in the key groove (22 a), the second pinion (24 a) is meshed with the second power wheel (24) in a sliding way, and when the second pinion (24 a) is contacted with the left side of the power wheel (24 a), when the power wheel (24) moves rightwards, the power wheel (24) contacts the first auxiliary gear (21), the right end of the power wheel (24) is meshed with the left end of the first auxiliary gear (21), a lantern ring (25) is arranged on the surface of the power wheel (24), a push rod (26) is arranged at the upper end of the lantern ring (25), an opening (7) is arranged at the upper end of the gearbox (6), the upper end of the push rod (26) extends out of the gearbox (6) through the opening (7), the other end of the driven shaft (22) extends into the protective cover (4) and is provided with the saw blade (5), and the saw blade (5) and the driven shaft (22) are screwed together in a threaded manner;

The supporting block (30) comprises a rotating body (31), a limit groove (32) is formed in the upper end of the rotating body (31), the supporting rod (1) is rotatably connected with the limit groove (32) through a first bolt (33), the left end of the rotating body (31) is arranged inside the base (40), a cavity (31 a) is formed in the rotating body (31), a fixing mechanism (70) is arranged inside the cavity (31 a), the fixing mechanism (70) comprises a semicircular body (71), a spring (72) is arranged between the semicircular body (71) and the inner wall of the cavity (31 a), a second connecting rod (73) is arranged at the right end of the semicircular body (71), the second connecting rod (73) is arranged inside the cavity (31 a), the other end of the second connecting rod (73) extends out of the upper surface of the right end of the rotating body (31) and is provided with a round button (74), when the round button (74) is not stressed, the semicircular body (71) is tightly attached inside the base (40), and when the round button (74) is pressed by an external force, the semicircular body (71) is far away from the base (40).

The limiting groove (32) is internally provided with a first groove (34), the limiting switch (80) comprises a clamping block (81), the middle end of the clamping block (81) at the front side is rotatably connected with the first groove (34) through a bolt (87), the right end of the clamping block (81) is provided with a first magnetic block (82), the left end of the clamping block (81) is provided with a third magnetic block (85), the inner wall of the front side of the first groove (34) is uniformly provided with a second magnetic block (83) and a fourth magnetic block (86), the first magnetic block (82) and the second magnetic block (83) are mutually attracted when being close, the third magnetic block (85) and the fourth magnetic block (86) are mutually attracted when being close, when the supporting rod (1) and the horizontal surface are in a 90-degree stable state, the right end of the clamping block (81) is tightly attached to the inner side of the first groove (34), the left end of the clamping block (81) is far away from the inner side of the first groove (34), the left end of the clamping block (81) is positioned at the left end of the supporting rod (1), the right end of the clamping block (81) is positioned at the right end of the supporting rod (1), the front surface of the right end of the clamping block (81) is tightly attached to the inner side of the first groove (34), the first magnetic block (82) and the second magnetic block (83) are mutually attached, the third magnetic block (85) and the fourth magnetic block (86) are mutually separated, and when the supporting rod (1) and the horizontal surface are in a motion state which is not 90 degrees, the left end of the clamping block (81) is tightly attached to the inner side of the first groove (34), the right end of the clamping block (81) is far away from the inner side of the first groove (34), the first magnetic block (82) and the second magnetic block (83) are mutually separated, and the third magnetic block (85) and the fourth magnetic block (86) are mutually attached;

The novel rotary table comprises a first cavity (41), a second cavity (47) and a clamping mechanism (50), wherein the first cavity (41) is arranged at the left end of a supporting seat (45), a rotating body (31) is arranged in the first cavity (41), a working groove (43) is formed in the middle of a base (40), recesses (46) are formed in the front side and the rear side of the upper end face of the base (40), a first sliding groove (44) is formed in the front end and the rear end of the base (40), a second sliding groove (47) is formed in the upper end of the first sliding groove (44), the upper end of the inner wall of the working groove (43) is provided with the clamping mechanism (50), the clamping mechanism (50) extends into the first sliding groove (44) and the second sliding groove (47), and the left end of the base (40) is provided with the fastening mechanism (69);

The clamping mechanism (50) comprises a clamping plate (51), sliding blocks (52) are arranged at the front end and the rear end of the clamping plate (51), the sliding blocks (52) are arranged in the first sliding groove (44), the sliding blocks (52) are fixed in the first sliding groove (44) through second bolts (53), the second bolts (53) extend to the upper end of the base (40) through second sliding grooves (47), and the second bolts (53) are fixed in the second sliding grooves (47) through nuts (54);

The fastening mechanism (69) comprises a transmission shaft (64), a plurality of shells (60) are connected to the transmission shaft (64), the transmission shaft (64) is rotatably connected with the shells (60) through five bearings (104) and six bearings (105), the shells (60) are arranged on the base (40), rollers (63) are arranged in the shells (60), the rollers (63) are screwed with the transmission shaft (64), elastic bands (61) are arranged on the rollers (63), one ends of the elastic bands (61) are fixed on the rollers (63) and are wound in a plurality of circles, the other ends of the elastic bands (61) extend out of the shells (60) and are provided with clamping pieces (62), when the fastening mechanism (69) is in a fixed state, the clamping pieces (62) are clamped into the clamping grooves (68), ratchet wheels (65) are arranged on the transmission shaft (64), one ends of the ratchet wheels (65) are provided with pawls (66), the other ends of the ratchet wheels (66) are rotatably connected with the base (40) through three bolts (67), and one ends of the rotary shafts (64 a) are rotatably connected with a knob (64 a).