阅读说明：本技术 一种电动切割机 (Electric cutting machine ) 是由 陈剑利 于 2019-11-06 设计创作，主要内容包括：本发明公开了一种电动切割机,其结构包括支杆,支杆上设有连杆一,连杆一连接有可旋转的把手,支杆中间一侧设有防护罩,防护罩内设有锯片,支杆中间另一侧设有可调节输出转速的变速机构,变速机构与锯片相连,支杆下端设有支撑块,支杆可在支撑块的限制下在一定角度内转动,支撑块内设有可固定支杆的限位开关,支撑块另一端与底座相连,底座一侧设有可限制支撑块只能在一定角度内转动的支撑座,底座上还设有夹持工件的夹紧机构和紧固机构,本发明的有益效果：本发明可以控制锯片的转速,面对不同硬度材料时不会大幅降低切割质量,且锯片与水平面之间的夹角能在一定范围内调节,能够适应不同的切割要求,提高了实用性。(The invention discloses an electric cutting machine, which structurally comprises a support rod, wherein a first connecting rod is arranged on the support rod, the first connecting rod is connected with a rotatable handle, a protective cover is arranged on one side in the middle of the support rod, a saw blade is arranged in the protective cover, a speed change mechanism capable of adjusting output rotating speed is arranged on the other side in the middle of the support rod, the speed change mechanism is connected with the saw blade, a supporting block is arranged at the lower end of the support rod, the support rod can rotate in a certain angle under the limitation of the supporting block, a limit switch capable of fixing the support 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: 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 within a certain range, can adapt to different cutting requirements, and improves the practicability.)

1. The utility model provides an electric cutting machine, includes branch (1), its characterized in that: the utility model discloses a saw blade of motor vehicle, including branch (1), connecting rod (2), handle (3), bearing, protection casing (4), saw bit (5) and gear box (6), gear box (6) inside are equipped with power unit (10), power unit (10) are connected with speed change mechanism (20) that can adjust output speed, speed change 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 (33) with supporting shoe (30) rotatable coupling, supporting shoe (30) with be equipped with between branch (1) and prevent branch (1) under non-operating condition A self-rotating limit switch (40), a support seat (45) is arranged at the lower end of the support block (30), one end of the supporting seat (45) is provided with a base (40), one end of the base (40) is provided with a first cavity (47), the first cavity (47) is connected with the supporting seat (45), one side of the lower end of the supporting block (30) is arranged in the first cavity (47) and is in clearance fit with the first cavity, the lower end of the supporting block (30) can rotate in the first cavity (47), a fixing mechanism (70) capable of fixing the supporting block (30) in the first cavity (47) is arranged in the supporting block (30), the base (40) is provided with a clamping mechanism (50), the front and the back of the upper surface of one end of the base (40) are provided with a plurality of clamping grooves (68), the other end of the base (40) is provided with fastening mechanisms (69) with the same number as the clamping grooves (68).

2. An electric cutter according to claim 1, characterized in that: 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).

3. An electric cutter according to claim 2, characterized in that: the speed change mechanism (20) comprises a first pinion (21), the first pinion (21) is meshed with a first main gear (13), a driven shaft (22) is arranged inside 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 a 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 formed in the position, between the first pinion (21) and the second pinion (23), of the driven shaft (22), and a power wheel (24) is arranged in the key groove (22 a), the inside key (24 a) that is equipped with of power wheel (24), key (24 a) are located in keyway (22 a), key (24 a) can slide in keyway (22 a), work as when power wheel (24) move left, power wheel (24) contact pinion gear two (23), power wheel (24) left end and pinion gear two (23) right-hand member meshing, work as power wheel (24) move right the time, power wheel (24) contact pinion gear two (23), power wheel (24) right-hand member and pinion gear one (21) left end meshing, power wheel (24) surface is equipped with the lantern ring (25), lantern ring (25) upper end is equipped with push rod (26), gearbox (6) upper end is equipped with opening (7), push rod (26) upper end is passed through opening (7) stretch out gearbox (6), the driven shaft (22) other end extends to in protection casing (4) and be equipped with saw bit (5) The saw blade (5) is screwed with the driven shaft (22) in a threaded manner.

4. An electric cutter according to claim 1, characterized in that: the supporting block (30) comprises a rotating body (31), a limiting groove (32) is formed in the upper end of the rotating body (31), the supporting rod (1) is rotatably connected with the limiting 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 in the cavity (31 a), the fixing mechanism (70) comprises a semi-circular body (71), a spring (72) is arranged between the semi-circular body (71) and the inner wall of the cavity (31 a), a second connecting rod (73) is arranged at the right end of the semi-circular body (71), the second connecting rod (73) is arranged in 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), and when the round button (, the semicircular body (71) is tightly attached to the inside of the base (40), and when the round button (74) is pressed by external force, the semicircular body (71) is far away from the inside of the base (40).

5. An electric cutter according to claim 4, characterized in that: the limiting switch is characterized in that a first groove (34) is formed in the limiting groove (32), the limiting switch (80) comprises a clamping block (81), the middle end of the clamping block (81) on the front side is rotatably connected with the first groove (34) through a bolt (87), a first magnetic block (82) is arranged at the right end of the clamping block (81), a third magnetic block (85) is arranged at the left end of the clamping block (81), a second magnetic block (83) and a fourth magnetic block (86) are uniformly arranged on the inner wall of the front side of the first groove (34), the first magnetic block (82) and the second magnetic block (83) are attracted to each other when being close to each other, the third magnetic block (85) and the fourth magnetic block (86) are attracted to each other when being close to each other, when the supporting rod (1) and the horizontal plane form 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, the right end of the clamping block (81) is located 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, when the supporting rod (1) and the horizontal plane are not in a 90-degree motion 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.

6. An electric cutter according to claim 4, characterized in that: base (40) are including cavity one (41), supporting seat (45) left end is located to cavity one (41), be equipped with in cavity one (41) rotator (31), be equipped with work groove (43) in the middle of base (40), both sides are equipped with sunkenly (46) around base (40) up end, both ends are equipped with spout one (44) around base (40), spout one (44) upper end is equipped with spout two (47), work groove (43) inner wall upper end is equipped with clamping mechanism (50), clamping mechanism (50) extend to spout one (44) with in the spout two (47), base (40) left end is equipped with fastening mechanism (69).

7. An electric cutter according to claim 6, characterized in that: clamping mechanism (50) is including splint (51), splint (51) front and back both ends are equipped with slider (52), slider (52) are located in spout one (44), slider (52) are fixed through bolt two (53) in spout one (44), bolt two (53) extend to through spout two (47) base (40) upper end, bolt two (53) are fixed in through nut (54) in spout two (47).

8. An electric cutter according to claim 6, characterized in that: fastening device (69) includes transmission shaft (64), be connected with a plurality of casing (60) on transmission shaft (64), transmission shaft (64) through five (104) of bearing and six (105) of bearing with casing (60) rotatable coupling, casing (60) are located on base (40), be equipped with gyro wheel (63) in casing (60), gyro wheel (63) with transmission shaft (64) screw thread is closed soon, be equipped with elastic webbing (61) on gyro wheel (63), elastic webbing (61) one end is fixed in on gyro wheel (63) and twines several circles, the elastic webbing (61) other end stretches out casing (60) and is equipped with fastener (62), when fastening device (69) is in fixed state, fastener (62) card is gone into in draw-in groove (68), be equipped with ratchet (65) on transmission shaft (64), ratchet (65) one end is equipped with pawl (66), the other end of the pawl (66) is rotatably connected with the base (40) through a third bolt (67), one end of the transmission shaft (64) is provided with a knob (64 a), and the knob (64 a) is screwed with the transmission shaft (64) in a threaded manner.

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 through the motor to cut a workpiece, but the electric cutting machine is not wide in application range due to the fact that the structure of the electric cutting machine is fixed in arrangement, and the electric cutting machine cannot meet cutting requirements under all conditions. For this reason, long-term research has been conducted, and various solutions have been proposed.

For example, chinese patent document discloses a metal cutting machine [ application No.: CN201510001880.9], comprising a base having an upper surface defining a main supporting 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 supporting mechanism connected to at least one of the clamping device and the base, the auxiliary supporting mechanism comprising a first auxiliary supporting member defining a first auxiliary supporting 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 grinding wheel is fixed, the function of bevel cutting cannot be provided, the grinding wheel is not suitable for the cutting condition with angle requirements, and meanwhile, the unstable clamping condition 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 rotating speed of the saw blade, can clamp materials with different shapes, improves the material cutting range and improves the applicability.

In order to achieve the purpose, the invention adopts the following technical scheme: this electric cutting machine includes branch, its characterized in that: the top end of the support rod is provided with a first connecting rod, the other end of the first connecting rod is provided with a handle, the handle is rotatably connected with the first connecting rod through a bearing, one side of the middle of the support rod is provided with a protective cover, a saw blade is arranged inside the protective cover, the other side of the middle of the support rod is provided with a gearbox, the gearbox is internally provided with a power mechanism, the power mechanism is connected with a speed change mechanism capable of adjusting output rotating speed, the other end of the speed change mechanism extends into the protective cover and is connected with the saw blade, the lower end of the support rod is provided with a supporting block, the support rod is rotatably connected with the supporting block through a first bolt, a limiting switch capable of preventing the support rod from rotating automatically under a non-working state is arranged between the supporting block and the support rod, the lower end, one side of the lower end of the supporting block is arranged in the cavity I and is in clearance fit, the lower end of the supporting block can rotate in the cavity I, a fixing mechanism capable of fixing the supporting block in the cavity I is arranged in the supporting block, a clamping mechanism is arranged on the base, a plurality of clamping grooves are formed in the front and back of the upper surface of one end of the base, fastening mechanisms with the same number as the clamping grooves are arranged at the other end of the base, flat materials can be fixed on the base through the clamping mechanism, and cylinders and irregular materials can be fixed on the base through the fastening mechanisms matched with the clamping grooves.

The speed change mechanism is creatively designed, the rotating speed of the saw blade can be simply and conveniently controlled, the cutting quality can not be reduced when materials with different hardness are faced, the supporting block can adjust the angle between the saw blade and the horizontal plane under the control of the fixing mechanism, different cutting requirements can be met, materials with different shapes can be stably fixed on the base through the clamping mechanism and the fastening mechanism, and the application range of the speed change mechanism is widened.

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, a first main gear is arranged at the middle end of the driving shaft and screwed with the driving shaft, a second main gear is arranged at the other end of the driving shaft and screwed with the driving shaft.

In the above electric cutting machine, the speed change mechanism includes a first pinion, the first pinion is engaged with the first master gear, a driven shaft is arranged inside the first pinion, the driven shaft is rotatably connected with the support rod through a second bearing, the first pinion is rotatably connected with the driven shaft through a third bearing, a second pinion is arranged at the middle end of the driven shaft, the second pinion is engaged with the second master gear, the second pinion is rotatably connected with the driven shaft through a fourth bearing, a key groove is arranged at a position of the driven shaft 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 inside the power wheel, the key is arranged in the key groove, 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 engaged with the right end of the second pinion, when the power wheel moves rightwards, the power wheel contacts the secondary gear II, the right end of the power wheel is meshed with the left end of the secondary gear I, a lantern ring is arranged on the surface of the power wheel, a push rod is arranged at the upper end of the lantern ring, an opening is formed in the upper end of the gearbox, the upper end of the push rod extends out of the gearbox through the opening, the other end of the driven shaft extends into the protective cover and is provided with the saw blade, and the saw blade is screwed with the driven shaft in a threaded mode.

In foretell electric cutting machine, the supporting shoe includes the rotator, the rotator upper end is equipped with the spacing groove, branch pass through bolt one with 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, the semicircle body with be equipped with the spring between the cavity inner wall the semicircle body right-hand member is equipped with connecting rod two, connecting rod two is located in the cavity, the two other ends of connecting rod stretch out rotator right end upper surface is equipped with the round button, works as when the round button does not receive the power, the semicircle body is hugged closely the cavity inner wall, works as when the round button receives external force to press, the semicircle body is kept away from the cavity inner wall.

In the electric cutting machine, a first groove is formed in the limiting groove, the limiting switch comprises a fixture block, the middle end of the fixture block on the front side is rotatably connected with the first groove through a bolt, a first magnetic block is arranged at the right end of the fixture block, a third magnetic block is arranged at the left end of the fixture block, a second magnetic block and a fourth magnetic block are uniformly arranged on the inner wall of the front side of the first groove, the first magnetic block and the second magnetic block attract each other when approaching, the third magnetic block and the fourth magnetic block attract each other when approaching, when the support rod is in a stable state, the right end of the fixture block clings to the inner side of the first groove, the left end of the fixture block is far away from the inner side of the first groove, the left end of the fixture block is located at the left end of the support rod, the right end of the fixture block is located at the right end of the support rod, the front surface of the, the supporting rod is fixed in the limiting groove, when the supporting rod is in a motion state, the left end of the clamping block is tightly attached to the inner side of the first groove, the right end of the clamping block is far away from the inner side of the first groove, the first magnetic block and the second magnetic block are separated from each other, and the third magnetic block and the fourth magnetic block are attached to each other

In foretell electric cutting machine, the base includes cavity one, the supporting seat left end is located to cavity one, be equipped with in the cavity one the rotator, be equipped with the work groove in the middle of the base, both sides are equipped with sunkenly before and after the base up end, both ends are equipped with spout one around the base, spout one upper end is equipped with spout two, work inslot 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 evenly placed fastening device.

In the 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 groove, the sliding blocks are fixed in the first sliding groove through a second bolt, the second bolt extends to the upper end of the base through the second sliding groove, and the second bolt is fixed in the second sliding groove through a nut. Fastening device includes the transmission shaft, be connected with a plurality of casing on the transmission shaft, the transmission shaft pass through five and six with bearing rotatable coupling of casing, the casing is located on the base, be equipped with the gyro wheel in the casing, the gyro wheel with the transmission shaft screw thread closes soon, be equipped with the elastic band on the gyro wheel, elastic band one end is fixed in on the gyro wheel and twine several circles, the elastic band other end stretches out the casing is equipped with the fastener, when fastening device is in fixed state, the fastener card is gone into in the draw-in groove, be equipped with the ratchet on the transmission shaft, ratchet one end is equipped with the pawl, the pawl other end passes through three and base rotatable coupling of bolt, transmission shaft one end is equipped with the knob, the knob with the transmission shaft screw thread closes soon.

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, two speeds can be selected, and the cutting quality can not be greatly reduced when materials with different hardness are faced, so that the saw blade can meet more cutting requirements.

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

4. The clamping mechanism and the fastening mechanism can fix common rotating bodies and cuboid materials on the base, and can also stably fix materials in different shapes on the base, so that the application range of the invention is enlarged.

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 saw blade is enhanced, and the stability of the saw blade 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 a base of a power cutter provided by the present invention.

Fig. 4 is a half sectional view of the speed change mechanism of the electric cutter according to the present invention.

Fig. 5 is a schematic diagram of the connection relationship of the limit switch of the electric cutter according to the present invention.

Fig. 6 is an a-a interface view of the electric cutter provided by the present invention.

FIG. 7 is a schematic view of the ratchet connection of the electric cutter according to the present invention.

FIG. 8 is a cross-sectional view of the interface B of the electric cutter provided by the present invention.

Fig. 9 is a half sectional view of the interface C of the electric cutter according to the present invention.

In the figure, 1, a strut; 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. an electric motor; 12. a drive shaft; 13. a first main gear; 14. a second main gear; 20. a speed change mechanism; 21. a first pinion; 22. a driven shaft; 22a, a key groove; 23. a secondary gear II; 24. a power wheel; 24a, a key; 25. a collar; 26. a push rod; 30. a support block; 31. a rotating body; 31a, a cavity; 32. a limiting groove; 33. a first bolt; 34. a first groove; 40. a base; 41. a first cavity; 43. a working groove; 44. a first sliding chute; 45. a supporting seat; 46. recessing; 47. a second chute; 50. a clamping mechanism; 51. a splint; 52. a slider; 53. a second bolt; 54. a nut; 60. a housing; 61. an elastic band; 62. a fastener; 63. a roller; 64. a drive shaft; 64a, a knob; 65. a ratchet wheel; 66. a pawl; 67. a third bolt; 68. a card slot; 69. a fastening mechanism; 70. a fixing mechanism; 71. a semi-circular body; 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 third magnetic block; 86. a fourth magnetic block; 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 sixth bearing; D. cylindrical work pieces to be cut.

Detailed Description

As shown in fig. 1, 2 and 3, the electric cutting machine of the present invention comprises a supporting rod, a first connecting rod 2 is disposed on the top end of the supporting rod 1, a handle 3 is disposed on the other end of the first connecting rod 2, the handle 3 is rotatably connected with the first connecting rod 2 through a bearing, a protective cover 4 is disposed on one side of the middle of the supporting rod 1, a saw blade 5 is disposed inside the protective cover 4, a gear box 6 is disposed on the other side of the middle of the supporting rod 1, a power mechanism 10 is disposed inside the gear box 6, the power mechanism 10 is connected with a speed change mechanism 20 capable of adjusting an output rotation speed, the other end of the speed change mechanism 20 extends into the protective cover 4 and is connected with the saw blade 5, a supporting block 30 is disposed at the lower end of the supporting rod 1, the supporting rod 1 is rotatably connected with the supporting block 30 through a, one end of the base 40 is provided with a first cavity 47, the first cavity 47 is connected with the supporting seat 45, one side of the lower end of the supporting block 30 is arranged inside the first cavity 47 and is in clearance fit, the lower end of the supporting block 30 can rotate in the first cavity 47, a fixing mechanism 70 capable of fixing the supporting block 30 inside the first cavity 47 is arranged in the supporting block 30, the base 40 is provided with a clamping mechanism 50, a plurality of clamping grooves 68 are formed in the front and back of the upper surface of one end of the base 40, the other end of the base 40 is provided with fastening mechanisms 69 with the same number as the clamping grooves 68, the clamping mechanism can fix flat materials on the base, and the fastening mechanisms are matched with.

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 transmission 6, the motor 11 is provided with a driving shaft 12, the driving shaft 12 is rotatably connected to the transmission 6 through a bearing one 100, a primary gear one 13 is disposed at the middle end of the driving shaft 12, the primary gear one 13 is screwed with the driving shaft 12, a secondary gear 14 is disposed at the left end of the driving shaft 12, and the secondary gear 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 main gear 13, a driven shaft 22 is disposed 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 disposed at the middle end of the driven shaft 22, the second pinion 23 is engaged with the second main gear 14, the second pinion 23 is rotatably connected with the driven shaft 22 through a fourth bearing 103, the driven shaft 22 is provided with a key groove 22a at a position between the first pinion 21 and the second pinion 23, a power wheel 24 is disposed at the outer end of the key groove 22a, a key 24a is disposed inside the power wheel 24, the key 24a is disposed in the key groove 22a, the key 24a is slidable in the key groove 22a, when the power wheel 24 moves to the left, the power wheel 24 contacts the second pinion 23, the left end of the power wheel 24, when the power wheel 24 moves rightwards, the power wheel 24 contacts the secondary gear II 23, the right end of the power wheel 24 is meshed with the left end of the secondary gear I21, 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 to push the push rod 26 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 secondary gear I21 or the secondary gear II 23 according to actual conditions, the rotating speed generated on the saw blade 5 when the power.

As shown in fig. 2 and 8, the supporting block 30 includes a rotating body 31, a limiting groove 32 is provided at the upper end of the rotating body 31, the supporting rod 1 is rotatably connected with the limiting groove 32 through a first bolt 33, when the first bolt 33 is tightened, a friction force is generated between the supporting rod 1 and the limiting groove 32, so that the supporting rod 1 can rotate in the limiting groove 32 under the condition of applying a force without rotating due to its own weight, the left end of the rotating body 31 is provided inside the base 40, a cavity 31a is provided in the rotating body 31, a fixing mechanism 70 is provided in the cavity 31a, the fixing mechanism 70 includes a semi-circular body 71, a spring 72 is provided between the semi-circular body 71 and the inner wall of the cavity 31a, a second connecting rod 73 is provided at the right end of the semi-circular body 71, the second connecting rod 73 is provided in the cavity 31a, the other end of the second connecting rod 73 extends out of the upper surface at the right end, when the knob 74 is pressed by an external force, the semi-circular body 71 is away from the inner wall of the cavity 31a, the rotating body 31 can rotate on a vertical plane in the cavity 31a, the supporting seat 45 limits the rotation angle of the rotating body 31, and the rotating body 31 can only rotate within the range of 0-90 degrees.

As shown in fig. 2 and 5, the first recess 34 is provided in the limiting groove 32, the limiting switch 80 is divided into a front portion and a rear portion, the front portion and the rear portion are mirror images of each other with the center of the limiting switch 80 as an axis, the limiting switch 80 includes a block 81, the middle end of the front block 81 is rotatably connected with the first recess 34 through a bolt 87, the upper end and the lower end of the block 81 are in contact with the first recess 34, the right end of the block 81 is provided with a first magnetic block 82, the left end of the block 81 is provided with a third magnetic block 85, the inner wall of the front side of the first recess 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 attract each other when approaching, the third magnetic block 85 and the fourth magnetic block 86 attract each other when approaching, when the strut 1 is in a stable state, the right end of the block 81 abuts against the inner side of the first recess 34, the, the front surface of the right end of the clamping block 81 is attached to the inner side of the first groove 34, the first magnetic block 82 is attached to the second magnetic block 83, the third magnetic block 85 is separated from the fourth magnetic block 86, the supporting rod 1 is fixed in the first groove 34 by the clamping block 81, when the supporting rod 1 is in a moving state, the left end of the clamping block 81 is 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 is separated from the second magnetic block 83, and the third magnetic block 85 is attached to.

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 slot 43 is disposed in the middle of the base 40, the front and rear sides of the upper end surface of the base 40 are provided with the recesses 46, the front and rear ends of the base 40 are provided with the first sliding slots 44, the upper end of the first sliding slots 44 is provided with the second sliding slots 47, the upper end of the inner wall of the working slot 43 is provided with the clamping mechanism 50, the clamping mechanism 50 extends to the first sliding slots 44 and the second sliding slots 47, the left end of the base 40 is provided with two fastening mechanisms 69 which are uniformly arranged, the clamping mechanism 50 includes the clamping plate 51, the front and rear ends of the clamping plate 51 are provided with the sliding blocks 52, the sliding blocks 52 are disposed in the first sliding slots 44, the sliding blocks 52 are fixed in the first sliding slots 44 through the second bolts 53, the second bolts 53 extend to, when the second bolt 53 is tightened, the sliding block 52 is fixed in the first sliding groove 44, and the flat workpiece can be placed into the working groove 43 for fixing.

As shown in fig. 1, 3 and 7, the fastening mechanism 69 includes a transmission shaft 64, the transmission shaft 64 is connected with a plurality of housings 60, the transmission shaft 64 is rotatably connected with the housings 60 through a bearing five 104 and a bearing six 105, the housings 60 are disposed on the base 40, a roller 63 is disposed in the housing 60, the roller 63 is screwed with the transmission shaft 64, the roller 63 is provided with an elastic band 61, one end of the elastic band 61 is fixed on the roller 63 and wound by a plurality of turns, the other end of the elastic band 61 extends out of the housing 60 and is provided with a fastener 62, when the fastening mechanism 69 is in a fixed state, the fastener 62 is fastened in the fastener groove 68, the transmission shaft 64 is provided with a ratchet 65, one end of the ratchet 65 is provided with a pawl 66, the other end of the pawl 66 is rotatably connected with the base 40 through a bolt three 67, one end of the transmission shaft 64 is provided with a knob 64, when the pawl 66 falls, it can catch the ratchet wheel 65 to maintain the elastic band 61 in a tensioned 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 to be cut D is placed in the recess 46, the pawl 66 rotates clockwise to enable the pawl to leave the ratchet wheel 65, the elastic band 61 is placed at the upper end of the cylindrical workpiece to be cut D, the clamping piece 62 is clamped into the clamping groove 68, the knob 64a is rotated to enable the roller 63 to rotate, the elastic band 61 is tightened, then the pawl 66 is rotated to enable the elastic band 66 to be clamped into the ratchet wheel 65, the elastic band 61 is kept in a tight state, and therefore the cylindrical workpiece to be cut D is fixed. When the workpiece to be cut is in a flat shape, 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 the workpiece to be cut is fixed in the working groove 43. When the knob 74 is pressed down to separate the semicircular body 71 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, thereby adjusting the cutting angle of the saw blade 5, and when the knob 74 is released, the semicircular body 71 is tightly attached to the inner wall of the cavity 41 by the elastic force of the spring 72, and the rotating body 31 cannot rotate due to the friction force generated between the semicircular body 71 and the inner wall of the cavity 41. The motor 11 is powered on, the motor 11 is started, the driving shaft 12 starts to rotate, the driving shaft 12 drives the first main gear 13 and the second main gear 14 to rotate, the first main gear 13 drives the first pinion 21 to rotate, the second main gear 14 drives the pinion 23 to rotate, the push rod 26 is pushed to move left at the moment, the lantern ring 25 below the push rod 26 pushes the power wheel 24 to move forward, the left end of the power wheel 24 is meshed with the second pinion 23, the power wheel 24 starts to rotate, the key 24a in the power wheel 24 is located in the keyway 22a, the power wheel 24 drives the driven shaft 22 to rotate, the driven shaft 22 drives the saw blade 5 to rotate, if higher rotating speed is needed, the push rod 26 is pushed to move right, the right end of the power wheel 24 is meshed with the left end of the first pinion 21, and higher rotating speed. The handle 3 is grasped, the support rod 1 is pushed to rotate anticlockwise around the limiting groove 32, when the support rod 1 moves, the left end of the support rod 1 pushes away the limitation of the fixture block 81, the fixture block 81 is changed from a state that the right end is tightly attached to the inner side of the first groove 34, the state that the magnetic block I82 is attached to the magnetic block II 83 to a state that the left end is tightly attached to the inner side of the first groove 34, the state that the magnetic block III 85 is attached to the magnetic block IV 86 continues to push the support rod 1 to rotate, the saw blade 5 is in contact with a workpiece to be cut, cutting action is started, and the support rod 1.

The specific embodiments described herein are merely illustrative 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.

Although the terms strut, opening, power mechanism, speed change mechanism, primary gear one, secondary gear one, push rod, support block, collar, recess, support seat, overtime, roller, semi-circle, knob, latch, magnet one, cavity, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.