An emergency protection device for a power tool

Abstract

The present invention discloses an emergency protection device for power tools, including an operating table. A guiding plate is slidably connected to the upper surface of the operating table. An airbag is arranged on the left side of the guiding plate, and an arc-shaped groove is arranged at the bottom of the airbag. The present invention relates to the technical field of electric saw protection. By setting a fixed shaft and an inclined rod, when the device is in use, under the action of the inclined rod, the blade first extends out from the inside of the operating table during operation, and then starts to rotate. Manually push the guiding plate to make the plate contact the blade, and the plate is cut. When a dangerous situation occurs, the sensor inside the device detects the pressure change outside the blade, the inclined rod rotates rapidly, the blade retracts into the inside of the operating table, the airbag blocks the top opening of the operating table, and the cam tilts the guiding plate. Through multiple protections, the safety of device use is improved, and the service life of the device is prolonged. When the blade needs to be replaced, just loosen the nut, solving the problem of the exposed saw blade of the traditional fixed electronic saw table saw.

Description

Technical Field

[0001] The present invention relates to the technical field of electric saw protection, and particularly relates to an emergency protection device for power tools. Background Art

[0002] An electric saw, also known as a "power saw", was invented by Andreas Stihl of Germany in 1926, which greatly saves the time and labor consumed in cutting materials. An electric saw is a cutting tool powered by electricity and used to cut wood, stone, steel, etc., with sharp teeth on the edge.

[0003] When a saw table based on an electric saw is in daily use, the saw blade needs to be in direct contact with the board. Due to the different densities and hardnesses of different materials, and the difference in the speed of manual pushing, when quickly cutting materials with a harder texture, the saw blade is likely to break due to external force overload, which is likely to damage the equipment and materials, and is also not conducive to the safety of the operator. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an emergency protection device for power tools, which solves the problem that the traditional saw table lacks protection equipment and has a low safety factor.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: An emergency protection device for power tools, including an operating table, on the upper surface of which a guiding plate is slidably connected. An airbag is arranged on the left side of the guiding plate, and an arc-shaped groove is arranged at the bottom of the airbag. A rotating shaft is slidably connected to the inner surface of the arc-shaped groove. An oil cylinder is fixedly connected to the inner surface of the operating table. The oil cylinder jacks up a push rod through a bent pipe. The push rod pushes an inclined rod to rotate, so that the rotating shaft makes a circular motion with a fixed axis as the center. The rotating shaft slides upward along the arc-shaped groove. A blade fixed to the outer surface of the rotating shaft by a nut extends out of the interior of the operating table. A bent pipe is fixedly connected to the lower surface of the oil cylinder. A push rod is slidably connected to the inner surface of the left end of the bent pipe. A fixed axis is arranged on the right side of the push rod. An inclined rod is fixedly connected to the outer surface of the fixed axis. The left end of the inclined rod is rotatably connected to a blade. A nut is fixedly connected to the outer surface of the blade. A sealing cylinder is arranged on the right side of the nut. The rotating shaft rotates driven by an external motor. A board installed on the upper surface of the guiding plate approaches the blade driven by the guiding plate, and the board is cut. A cam is arranged on the right side of the sealing cylinder, and a locking device is arranged on the left side of the cam;

[0006] The inner surface of the sealing cylinder is fixedly connected with an air inlet pipe. A ball is arranged at the bottom of the air inlet pipe. The outer surface of the ball is slidably connected with a piston. A retaining ring is arranged on the outer surface of the piston. When the sensor inside the equipment detects that the external pressure on the blade is too high, in order to prevent the blade from being overloaded and broken, the oil cylinder controls the inclined rod to rotate reversely, the blade retracts into the interior of the operating table, the locking device pops out and locks the blade. At the same time, the cam rotates clockwise. A plug rod is arranged on the left side of the retaining ring, and an air outlet pipe is arranged on the outer surface of the plug rod.

[0007] Preferably, the top end of the air outlet pipe is fixedly connected with the inner surface of the airbag, and the bottom end of the air outlet pipe is fixedly connected with the inner surface of the sealing cylinder. The impact pushes the sealing cylinder, and the sealing cylinder injects air into the interior of the airbag. The airbag expands. Then the cam continues to rotate clockwise. Under the extrusion of the cam, the guiding plate rotates along the outer surface of the connecting rod, the guiding plate inclines, and the sliding rod retracts into the interior of the operating table during the process of manually pushing the guiding plate. By separating the blade, the plate and the operator, the three are prevented from being damaged due to the impact. The outer surface of the air outlet pipe is fixedly connected with the inner surface of the operating table. The left end of the plug rod and the outer surface of the retaining ring are fixedly connected with the inner surface of the sealing cylinder. The left end of the compression spring is fixedly connected with the inner surface of the sealing cylinder, and the right end of the compression spring is fixedly connected with the outer surface of the piston. The inner surface of the piston is slidably connected with the outer surface of the plug rod, and the outer surface of the piston is slidably connected with the inner surface of the sealing cylinder.

[0008] Preferably, the lower surface of the guiding plate is rotatably connected with a connecting rod. As the cam rotates, the cam pushes the piston to move leftward along the inner surface of the sealing cylinder. The ball retracts into the interior of the piston, the plug rod retracts into the interior of the piston, the compression spring is squeezed and contracted, and the piston is separated from the retaining ring. The inner surface of the connecting rod is fixedly connected with a sliding rod, and the outer surface of the sliding rod is slidably connected with the inner surface of the operating table.

[0009] Preferably, the outer surface of the fixed shaft is rotatably connected with the inner surface of the operating table. The top end of the ejector rod is rotatably connected with the lower surface of the inclined rod. The air inlet pipe discharges air from the air outlet pipe into the interior of the airbag. The airbag expands. The elastic piece at the bottom of the ball forces the ball to be stuck inside the sealing cylinder to ensure continuous air injection. After the air injection is completed, the piston is pulled out so that the ball is located outside the sealing cylinder. The inner surface of the left end of the inclined rod is rotatably connected with the outer surface of the rotating shaft. The outer surface of the rotating shaft is threadedly connected with the inner surface of the nut. The inner surface of the operating table is rotatably connected with the outer surface of the cam.

[0010] Preferably, the outer surface of the airbag is fixedly connected to the inner surface of the operating table. The oil cylinder injects hydraulic oil into the elbow pipe. As the hydraulic oil flows, the buoyancy at the bottom of the sliding ball increases under the push of the hydraulic oil. The sleeve drives the rubber ring to slide upward along the outer surface of the vertical rod, and the ejector rod extends. When the hydraulic oil is stationary, the sliding ball falls back. The arc-shaped groove is formed in the wall of the operating table. When the oil cylinder sucks the hydraulic oil, the ejector rod retracts and the sliding ball rises. During the process of pumping and sucking oil, the contact friction between the rising rubber ring and the fixed shaft offsets the inertia when the fixed shaft rotates. Cooperating with the ejector rod, it can ensure that the blade extends and retracts in a timely and accurate manner. Both ends of the rotating shaft penetrate the inner surface of the operating table and extend to the outside of the operating table.

[0011] Preferably, a vertical rod is fixedly connected to the inner surface of the elbow pipe. A sliding ball is slidably connected to the outer surface of the vertical rod. A sleeve is fixedly connected to the upper surface of the sliding ball. Under the action of the inclined rod, the blade first extends from the inside of the operating table during operation, and then starts to rotate. Manually push the guide plate so that the sheet material contacts the blade, and the sheet material is cut. When a danger occurs, the sensor inside the equipment detects the pressure change outside the blade, and the inclined rod rotates rapidly. A rubber ring is fixedly connected to the outer surface of the sleeve, and an outer cover is arranged at the bottom of the rubber ring.

[0012] Preferably, the outer surface of the sliding ball is slidably connected to the inner surface of the outer cover, and the inner surface of the sleeve is slidably connected to the outer surface of the vertical rod. The blade retracts into the inside of the operating table, and the airbag blocks the top opening of the operating table. The cam tilts the guide plate. Through multiple protections, the safety of equipment use is improved and the service life of the equipment is extended. When the blade needs to be replaced, just loosen the nut. The outer surface of the sleeve is slidably connected to the inner surface of the outer cover. The lower surface of the outer cover is fixedly connected to the upper surface of the elbow pipe. The outer surface of the rubber ring is in contact with the outer surface of the fixed shaft.

[0013] Preferably, the locking device includes a push rod. A limiting rod is arranged outside the push rod. A thrust spring is arranged outside the limiting rod. As the blade retracts, the compressed thrust spring is released. Driven by the fixed plate, the push rod forces the clamping plate to approach the blade. The limiting rod ensures that the clamping plate is always perpendicular. Under the frictional resistance of the clamping plate, the retracting blade quickly decelerates. The right end of the thrust spring is fixedly connected to a fixed plate, and a clamping plate is arranged on the right side of the fixed plate.

[0014] Preferably, the outer surfaces of the push rod and the limit rod are slidably connected to the inner surface of the operating table. The inner surface of the operating table is fixedly connected to the left end of the thrust spring. The right end of the limit rod is fixedly connected to the outer surface of the fixed plate. The rubber material clamping plate is distorted by the action of the blade. By converting the rotational potential energy of the blade into the deformation effect of the rubber material, it is ensured that the blade will not impact the inside of the operating table. The inner surface of the fixed plate is fixedly connected to the outer surface of the push rod. The right end of the push rod is fixedly connected to the outer surface of the clamping plate. The outer surface on the right side of the clamping plate is in contact with the outer surface of the blade.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. In the present invention, by providing an operating table, when the device is in use, the oil cylinder jacks up the ejector rod through the elbow pipe. The ejector rod pushes the inclined rod to rotate, causing the rotating shaft to perform a circular motion with a fixed axis as the center. The rotating shaft slides upward along the arc-shaped groove. The blade fixed to the outer surface of the rotating shaft by the nut extends out of the inside of the operating table. The rotating shaft rotates driven by an external motor. The plate installed on the upper surface of the guiding plate approaches the blade driven by the guiding plate, and the plate is cut, solving the problem of low efficiency of traditional manual cutting of plates.

[0017] 2. In the present invention, by providing a cam, when the device is in use, when the sensor inside the device detects that the external pressure on the blade is too large, in order to prevent the blade from being overloaded and broken, the oil cylinder controls the inclined rod to rotate in the reverse direction, and the blade retracts into the inside of the operating table. The locking device pops out and locks the blade. At the same time, the cam rotates clockwise and impacts and pushes the sealing cylinder. The sealing cylinder injects air into the inside of the airbag. The airbag expands. Then the cam continues to rotate clockwise. Under the extrusion of the cam, the guiding plate rotates along the outer surface of the connecting rod. The guiding plate tilts, and the sliding rod retracts into the inside of the operating table during the process of manually pushing the guiding plate. By separating the blade, the plate and the operator, it is avoided that the three are damaged due to impact, solving the problem that traditional electric saw tables are easily damaged by impact.

[0018] 3. In the present invention, by providing a sealing cylinder, when the device is in use, as the cam rotates, the cam pushes the piston to move leftward along the inner surface of the sealing cylinder. The ball retracts into the inside of the piston. The insertion rod retracts into the inside of the piston. The compression spring is squeezed and shrunk. The piston is separated from the retaining ring. The air inlet pipe discharges air from the air outlet pipe into the inside of the airbag. The airbag expands. The elastic piece at the bottom of the ball forces the ball to be stuck inside the sealing cylinder, ensuring continuous air injection. After the air injection is completed, the piston is pulled out so that the ball is located outside the sealing cylinder, solving the problem that the outer surface of traditional electric saw tables lacks protection equipment and personnel are easily in contact with the saw blade.

[0019] IV. The present invention is provided with a bent pipe. When the device is in use, the oil cylinder injects hydraulic oil into the interior of the bent pipe. As the hydraulic oil flows, the buoyancy at the bottom of the sliding ball increases under the push of the hydraulic oil. The sleeve drives the rubber ring to slide upward along the outer surface of the vertical rod, and the ejector rod extends. When the hydraulic oil is stationary, the sliding ball falls back. When the oil cylinder sucks the hydraulic oil, the ejector rod retracts and the sliding ball rises. During the process of pumping and sucking oil, through the contact friction between the rising rubber ring and the fixed shaft, the inertia when the fixed shaft rotates is offset. Cooperating with the ejector rod, it can ensure that the blade extends and retracts in a timely and accurate manner, solving the problem that the saw blade of the traditional electric saw table cannot be separated in time.

[0020] V. The present invention is provided with a locking device. When the device is in use, as the blade retracts, the compressed thrust spring releases. Driven by the fixed plate, the push rod forces the clamping plate to approach the blade. The limiting rod ensures that the clamping plate is always perpendicular. Under the action of the frictional resistance of the clamping plate, the retracting blade quickly decelerates. The rubber clamping plate is distorted by the action of the blade. By converting the rotational potential energy of the blade into the deformation effect of the rubber material, it is ensured that the blade will not impact the interior of the operating table, solving the problem that the traditional retractable electric saw table still rotates due to inertia after retracting.

[0021] VI. The present invention is provided with a fixed shaft and an inclined rod. When the device is in use, under the action of the inclined rod, the blade first extends from the interior of the operating table during operation, and then starts to rotate. Manually push the guiding plate so that the plate contacts the blade, and the plate is cut. When a dangerous situation occurs, the sensor inside the device detects the pressure change outside the blade. The inclined rod quickly rotates, and the blade retracts into the interior of the operating table. The airbag blocks the top opening of the operating table, and the cam raises the guiding plate. Through multiple protections, the safety of device use is improved, and the service life of the device is extended. When the blade needs to be replaced, just loosen the nut, solving the problem that the saw blade of the traditional fixed electric saw table is exposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view of the present invention;

[0023] Figure 2 is the sectional view of the present invention;

[0024] Figure 3 is the structural schematic diagram of the bottom of the guiding plate of the present invention;

[0025] Figure 4 is the structural schematic diagram of the interior of the sealing cylinder of the present invention;

[0026] Figure 5 is the structural schematic diagram of the interior of the bent pipe of the present invention;

[0027] Figure 6 is the structural schematic diagram of the locking device of the present invention;

[0028] In the figure: 1, operating table; 2, guiding plate; 3, airbag; 4, arc groove; 5, rotating shaft; 6, oil cylinder; 7, elbow pipe; 8, ejector rod; 9, fixed shaft; 10, inclined rod; 11, blade; 12, nut; 13, sealing cylinder; 14, cam; 15, locking device; 16, connecting rod; 17, sliding rod; 20, intake pipe; 21, ball; 22, piston; 23, retaining ring; 24, inserting rod; 25, compression spring; 26, exhaust pipe; 30, vertical rod; 31, sliding ball; 32, sleeve; 33, rubber ring; 34, outer cover; 40, push rod; 41, limiting rod; 42, thrust spring; 43, fixing plate; 44, clamping plate. Detailed implementation manners

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes. Embodiment 1:

[0030] Please refer to Figures 1 - 6 , the present invention provides a technical solution: an emergency protection device for power tools, including an operating table 1, a guiding plate 2 is slidably connected to the upper surface of the operating table 1, an airbag 3 is arranged on the left side of the guiding plate 2, an arc groove 4 is arranged at the bottom of the airbag 3, a rotating shaft 5 is slidably connected to the inner surface of the arc groove 4, an oil cylinder 6 is fixedly connected to the inner surface of the operating table 1, a bent pipe 7 is fixedly connected to the lower surface of the oil cylinder 6, an ejector rod 8 is slidably connected to the inner surface of the left end of the bent pipe 7, a fixed shaft 9 is arranged on the right side of the ejector rod 8, an inclined rod 10 is fixedly connected to the outer surface of the fixed shaft 9, a blade 11 is rotatably connected to the outer surface of the left end of the inclined rod 10, a nut 12 is fixedly connected to the outer surface of the blade 11, a sealing cylinder 13 is arranged on the right side of the nut 12, a cam 14 is arranged on the right side of the sealing cylinder 13, and a locking device 15 is arranged on the left side of the cam 14;

[0031] An intake pipe 20 is fixedly connected to the inner surface of the sealing cylinder 13, a ball 21 is arranged at the bottom of the intake pipe 20, a piston 22 is slidably connected to the outer surface of the ball 21, a retaining ring 23 is arranged on the outer surface of the piston 22, an inserting rod 24 is arranged on the left side of the retaining ring 23, and an exhaust pipe 26 is arranged outside the inserting rod 24.

[0032] The top end of the air outlet pipe 26 is fixedly connected to the inner surface of the airbag 3, the bottom end of the air outlet pipe 26 is fixedly connected to the inner surface of the sealing cylinder 13, the outer surface of the air outlet pipe 26 is fixedly connected to the inner surface of the operating table 1, the left end of the inserting rod 24 and the outer surface of the retaining ring 23 are fixedly connected to the inner surface of the sealing cylinder 13, the left end of the compression spring 25 is fixedly connected to the inner surface of the sealing cylinder 13, the right end of the compression spring 25 is fixedly connected to the outer surface of the piston 22, the inner surface of the piston 22 is slidably connected to the outer surface of the inserting rod 24, and the outer surface of the piston 22 is slidably connected to the inner surface of the sealing cylinder 13. The lower surface of the guiding plate 2 is rotatably connected with a connecting rod 16, the inner surface of the connecting rod 16 is fixedly connected with a sliding rod 17, and the outer surface of the sliding rod 17 is slidably connected to the inner surface of the operating table 1.

[0033] The outer surface of the fixed shaft 9 is rotatably connected to the inner surface of the operating table 1, the top end of the ejector rod 8 is rotatably connected to the lower surface of the inclined rod 10, the inner surface of the left end of the inclined rod 10 is rotatably connected to the outer surface of the rotating shaft 5, the outer surface of the rotating shaft 5 is threadedly connected to the inner surface of the nut 12, and the outer surface of the cam 14 is rotatably connected to the inner surface of the operating table 1. The outer surface of the airbag 3 is fixedly connected to the inner surface of the operating table 1, the arc-shaped groove 4 is formed in the wall of the operating table 1, and both ends of the rotating shaft 5 penetrate the inner surface of the operating table 1 and extend to the outside of the operating table 1.

[0034] During use, the oil cylinder 6 jacks up the ejector rod 8 through the elbow pipe 7, the ejector rod 8 pushes the inclined rod 10 to rotate, so that the rotating shaft 5 makes a circular motion with the fixed shaft 9 as the center, the rotating shaft 5 slides upward along the arc-shaped groove 4, and the blade 11 fixed on the outer surface of the rotating shaft 5 by the nut 12 extends out of the inside of the operating table 1. The rotating shaft 5 rotates driven by an external motor, and the plate material installed on the upper surface of the guiding plate 2 approaches the blade 11 driven by the guiding plate 2, and the plate material is cut.

[0035] When the sensor inside the equipment detects that the external pressure on the blade 11 is too high, in order to prevent the blade 11 from being overloaded and broken, the oil cylinder 6 controls the inclined rod 10 to rotate in the reverse direction, the blade 11 retracts into the inside of the operating table 1, the locking device 15 pops out and locks the blade 11. At the same time, the cam 14 rotates clockwise, hits and pushes the sealing cylinder 13, the sealing cylinder 13 injects air into the airbag 3, the airbag 3 expands, and then the cam 14 continues to rotate clockwise. Pushed by the cam 14, the guiding plate 2 rotates along the outer surface of the connecting rod 16, the guiding plate 2 tilts, and the sliding rod 17 retracts into the inside of the operating table 1 during the process of manually pushing the guiding plate 2. By separating the blade 11, the plate material and the operator, the three are prevented from being damaged due to the impact.

[0036] As the cam 14 rotates, the cam 14 pushes the piston 22 to move leftward along the inner surface of the sealing cylinder 13. The ball 21 retracts into the interior of the piston 22, the inserting rod 24 retracts into the interior of the piston 22, the compression spring 25 is squeezed and contracted, the piston 22 is separated from the retaining ring 23, and the air inlet pipe 20 discharges air from the air outlet pipe 26 into the interior of the airbag 3. The airbag 3 expands, and the elastic piece at the bottom of the ball 21 forces the ball 21 to be stuck inside the sealing cylinder 13 to ensure continuous air injection. After the air injection is completed, the piston 22 is pulled out so that the ball 21 is located outside the sealing cylinder 13. Embodiment 2:

[0037] Please refer to Figures 1 - 6 , the present invention provides a technical solution: on the basis of Embodiment 1, a vertical rod 30 is fixedly connected to the inner surface of the bent pipe 7. A sliding ball 31 is slidably connected to the outer surface of the vertical rod 30. A sleeve 32 is fixedly connected to the upper surface of the sliding ball 31. A rubber ring 33 is fixedly connected to the outer surface of the sleeve 32. An outer cover 34 is arranged at the bottom of the rubber ring 33. The outer surface of the sliding ball 31 is slidably connected to the inner surface of the outer cover 34. The inner surface of the sleeve 32 is slidably connected to the outer surface of the vertical rod 30. The outer surface of the sleeve 32 is slidably connected to the inner surface of the outer cover 34. The lower surface of the outer cover 34 is fixedly connected to the upper surface of the bent pipe 7. The outer surface of the rubber ring 33 is in contact with the outer surface of the fixed shaft 9.

[0038] The locking device 15 includes a push rod 40. A limiting rod 41 is arranged outside the push rod 40. A thrust spring 42 is arranged outside the limiting rod 41. The right end of the thrust spring 42 is fixedly connected to a fixing plate 43. A clamping plate 44 is arranged on the right side of the fixing plate 43. The outer surfaces of the push rod 40 and the limiting rod 41 are slidably connected to the inner surface of the operating table 1. The inner surface of the operating table 1 is fixedly connected to the left end of the thrust spring 42. The right end of the limiting rod 41 is fixedly connected to the outer surface of the fixing plate 43. The inner surface of the fixing plate 43 is fixedly connected to the outer surface of the push rod 40. The right end of the push rod 40 is fixedly connected to the outer surface of the clamping plate 44. The outer surface on the right side of the clamping plate 44 is in contact with the outer surface of the blade 11.

[0039] During use, the oil cylinder 6 injects hydraulic oil into the bent pipe 7. The hydraulic oil flows. Under the push of the hydraulic oil, the buoyancy at the bottom of the sliding ball 31 increases. The sleeve 32 drives the rubber ring 33 to slide upward along the outer surface of the vertical rod 30, and the ejector rod 8 extends. When the hydraulic oil is stationary, the sliding ball 31 falls back. When the oil cylinder 6 sucks the hydraulic oil, the ejector rod 8 retracts and the sliding ball 31 rises. During the process of pumping and sucking oil, through the contact friction between the rising rubber ring 33 and the fixed shaft 9, the inertia when the fixed shaft 9 rotates is offset. Cooperating with the ejector rod 8, it can ensure that the blade 11 extends and retracts in a timely and accurate manner.

[0040] As the blade 11 retracts, the compressed thrust spring 42 is released. Driven by the fixed plate 43, the push rod 40 forces the clamping plate 44 to approach the blade 11. The limit rod 41 ensures that the clamping plate 44 is always perpendicular. Under the frictional resistance of the clamping plate 44, the retracting blade 11 quickly decelerates. The rubber clamping plate 44 is distorted by the action of the blade 11. By converting the rotational potential energy of the blade 11 into the deformation effect of the rubber material, it is ensured that the blade 11 will not impact the inside of the operating table 1.

[0041] Under the action of the inclined rod 10, the blade 11 first extends from the inside of the operating table 1 during operation, and then starts to rotate. Manually push the guide plate 2 so that the sheet material contacts the blade 11, and the sheet material is cut. When a dangerous situation occurs, the sensor inside the device detects the pressure change outside the blade 11, the inclined rod 10 quickly rotates, and the blade 11 retracts into the inside of the operating table 1. The airbag 3 blocks the top opening of the operating table 1, and the cam 14 tilts the guide plate 2. Through multiple protections, the safety of the device during use is improved, and the service life of the device is extended. When the blade 11 needs to be replaced, just loosen the nut 12.

[0042] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. An emergency protection device for an electric saw, comprising an operating table (1), characterized in that: The upper surface of the operating table (1) is slidably connected to a guide plate (2), a cutting plate is mounted on the guide plate, an air bag (3) is arranged on the left side of the guide plate (2), an arc groove (4) is arranged at the bottom of the air bag (3), a rotating shaft (5) is slidably connected to the inner surface of the arc groove (4), an oil cylinder (6) is fixedly connected to the inner surface of the operating table (1), a curved pipe (7) is fixedly connected to the lower surface of the oil cylinder (6), a push rod (8) is slidably connected to the inner surface of the left end of the curved pipe (7), a fixed shaft (9) is arranged on the right side of the push rod (8), an inclined rod (10) is fixedly connected to the outer surface of the fixed shaft (9), a blade (11) is rotatably connected to the outer surface of the left end of the inclined rod (10), a nut (12) is fixedly connected to the outer surface of the blade (11), a sealing cylinder (13) is arranged on the right side of the nut (12), a cam (14) is arranged on the right side of the sealing cylinder (13), and a locking device (15) is arranged on the left side of the blade; The inner surface of the sealing cylinder (13) is fixedly connected to an air inlet pipe (20), a piston (22) is provided inside the sealing cylinder, a retaining ring (23) is provided on the outer surface of the piston (22), and a plug rod (24) is provided on the left side of the retaining ring (23); the top end of the air outlet pipe (26) is connected to the air bag (3), the bottom end of the air outlet pipe (26) is connected to the sealing cylinder (13), the left end of the plug rod (24) and the outer surface of the retaining ring (23) are fixedly connected to the inner surface of the sealing cylinder (13), a compression spring (25) is fixedly connected between the sealing cylinder and the piston, the inner surface of the piston (22) is slidably connected to the outer surface of the plug rod (24), the outer surface of the piston (22) is slidably connected to the inner surface of the sealing cylinder (13), a ball is slidably connected to the piston, and a spring is provided at the bottom of the ball; The fixed shaft (9) is rotatably connected to the operating table (1), the top end of the push rod (8) is rotatably connected to the lower surface of the inclined rod (10), the inclined rod (10) is rotatably connected to the rotating shaft (5), the rotating shaft (5) is threadedly connected to the nut (12), and the operating table (1) is rotatably connected to the cam (14); the outer surface of the airbag (3) is fixedly connected to the inner surface of the operating table (1); The cam rotates clockwise to push the sealing cylinder, which injects air into the interior of the airbag. The airbag expands to block the opening on the top of the operating table. The cam continues to rotate clockwise to push the guide plate to rotate and tilt.

2. The emergency protection device for electric saw according to claim 1, characterized in that: The outer surface of the air outlet pipe (26) is fixedly connected to the inner surface of the operating table (1).

3. The emergency protection device for electric saw according to claim 1, characterized in that: The lower surface of the guide plate (2) is rotatably connected to a connecting rod (16), the inner surface of the connecting rod (16) is fixedly connected to a sliding rod (17), and the outer surface of the sliding rod (17) is slidably connected to the inner surface of the operating table (1).

4. The emergency protection device for electric saw according to claim 1, characterized in that: The arc-shaped groove (4) is formed in the wall of the operating table (1), and both ends of the rotating shaft (5) penetrate the inner surface of the operating table (1) and extend to the outside of the operating table (1).

5. The emergency protection device for electric saw according to claim 1, characterized in that: The inner surface of the curved pipe (7) is fixedly connected to a hanging rod (30), the outer surface of the hanging rod (30) is slidably connected to a sliding ball (31), the upper surface of the sliding ball (31) is fixedly connected to a sleeve (32), the outer surface of the sleeve (32) is fixedly connected to a rubber ring (33), and the bottom of the rubber ring (33) is provided with an outer cover (34).

6. The emergency protection device for electric saw according to claim 5, characterized in that: The outer surface of the sliding ball (31) is slidably connected to the inner surface of the outer cover (34), the inner surface of the sleeve (32) is slidably connected to the outer surface of the vertical rod (30), the outer surface of the sleeve (32) is slidably connected to the inner surface of the outer cover (34), the lower surface of the outer cover (34) is fixedly connected to the upper surface of the curved pipe (7), and the outer surface of the rubber ring (33) is in contact with the outer surface of the fixed shaft (9).

7. The emergency protection device for electric saw according to claim 1, characterized in that: The locking device (15) comprises a push rod (40), a limit rod (41) is arranged outside the push rod (40), a thrust spring (42) is arranged outside the limit rod (41), a fixing plate (43) is fixedly connected to the right end of the thrust spring (42), and a clamping plate (44) is arranged on the right side of the fixing plate (43).

8. An emergency protection device for electric saw according to claim 7, characterized in that: The outer surfaces of the push rod (40) and the limiting rod (41) are slidably connected to the inner surface of the operating table (1); the inner surface of the operating table (1) is fixedly connected to the left end of the thrust spring (42); the right end of the limiting rod (41) is fixedly connected to the outer surface of the fixing plate (43); the inner surface of the fixing plate (43) is fixedly connected to the outer surface of the push rod (40); the right end of the push rod (40) is fixedly connected to the outer surface of the clamping plate (44); and the outer surface of the right side of the clamping plate (44) contacts the outer surface of the blade (11).

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