An electric pick

Abstract

The present invention discloses an electric pick, including a stator, a handle, a crankcase, a stator shell, an impact piece and a steering sleeve, wherein the inner side of the bottom of the stator shell is fixedly installed with the outer side of the bottom of the stator, and a rotating shaft is movably installed at the bottom of the handle. The electric pick is provided with an oil seal cover, and when the electric pick is used, the handle is held by hand, and the damping plate is pressed down. After the switch capacitor supplies power to the motor, the motor drives the large gear to rotate through the rotor gear shaft, and an eccentric wheel is clamped on one side of the top of the large gear through an eccentric shaft pin. When the eccentric wheel rotates at the top of the large gear, the top of the eccentric shaft pin slides inside the sleeve, and the sleeve limits the eccentric shaft pin to prevent the eccentric shaft pin from driving the eccentric gear due to the increase in the shaking range, thereby damaging the impact hammer and the piston cylinder. At the same time, the first bearing and the first skeleton oil seal limit the rotor gear shaft to prevent the rotor gear shaft from swinging violently when the rotor gear shaft rotates at high speed, thereby protecting the rotor gear shaft and the teeth of the large gear from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of electric tools, in particular to an electric pick. Background Art

[0002] The electric pick is a double-insulated handheld power tool powered by a single-phase series-excited motor. It is safe, reliable, efficient and easy to operate. It is widely used in pipeline laying, machinery installation, water supply and drainage facility construction, interior decoration, port facility construction and other construction projects. It is suitable for crushing, leveling, excavating, grooving and cutting concrete, masonry structures and asphalt pavements with a pick or other appropriate accessories such as a chisel and a shovel.

[0003] In the prior art, for example, the "electric pick" with Chinese patent number CN 112824054 A includes: a reduction box, including a box body and a transmission mechanism disposed in the box body; an impact mechanism, including a piston cylinder, an impact hammer assembly driven by the transmission mechanism, and an impactor disposed in the piston cylinder and driven by the impact hammer assembly to reciprocate, and a striker disposed in the piston cylinder to withstand the impact of the impactor, wherein the first end of the piston cylinder is connected and positioned in the box body, and the second end of the piston cylinder opposite to the first end is equipped with an electric pick chuck; and a plastic shell, which is sleeved on the outside of the piston cylinder. In the above-mentioned electric pick, the piston cylinder is connected and positioned in the reduction box. On the one hand, the piston cylinder is better positioned and supported, and on the other hand, compared with the solution of using a metal straight cylinder, the plastic shell is lighter in weight, which greatly reduces the weight of the whole machine and makes the operation more flexible and convenient. However, in the prior art, when the eccentric wheel rotates at high speed, the inertia causes the eccentric gear and the rotor gear shaft to shake within a certain range, resulting in lateral collision and friction between the impact hammer and the inner side of the piston cylinder, and the rotor gear shaft swinging, thereby damaging the impact hammer and the gear, and even causing the teeth to get stuck and burn the motor.

[0004] So we proposed an electric pick to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide an electric pick to solve the problem proposed in the above background technology that during the high-speed rotation of the eccentric wheel, the eccentric gear and the rotor gear shaft will shake within a certain range due to inertia, resulting in lateral collision and friction between the impact hammer and the inner side of the piston cylinder, and the rotor gear shaft will swing, thereby damaging the impact hammer and the gear, and even causing teeth to get stuck and burn out the motor.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a stator, a handle, a crankcase, a stator shell, an impact piece and a steering sleeve, wherein the inner bottom side of the stator shell is fixedly mounted to the outer bottom side of the stator, a rotating shaft is movably mounted on the bottom of the handle, two buffer screws are clamped on the top of the handle, the outer side of the rotating shaft is movably mounted on the outer bottom side of the stator shell, one end of the two buffer screws is threadedly connected to one end of the top of the crankcase, the other end of the crankcase is clamped to the outer side of one end of the steering sleeve, four steel balls are movably mounted on one end of the impact piece, and one end of the impact piece is clamped to one end of the steering sleeve through a plurality of steel balls, the other end of the impact piece is movably mounted to the top of the stator, an oil seal cover is clamped on one end of the crankcase close to the stator, and a sleeve is fixedly mounted on the bottom of the oil seal cover;

[0007] The stator includes an electric motor, a rotor gear shaft is movably connected at the top axis of the electric motor, an air guide cover is fixedly installed on the top outer side of the electric motor, a first bearing and a second bearing are movably installed at the top axis of the air guide cover, a first skeleton oil seal is movably installed on the top of the first bearing and the second bearing, the axis of the first skeleton oil seal is sleeved with the outer side of the rotor gear shaft, a large gear is meshedly connected with the top outer side of the rotor gear shaft, a bearing steel wear-resistant sleeve is fixedly installed on the top outer side of the air guide cover, the top of the bearing steel wear-resistant sleeve is plugged into the bottom of the large gear, an eccentric shaft pin is plugged into one side of the top of the large gear, an eccentric wheel is plugged into the top outer side of the eccentric shaft pin, and the top of the eccentric shaft pin is movably connected to the inner side of the sleeve.

[0008] Preferably, a bottom cover is fixedly installed on the bottom of the stator shell, a bearing is sleeved on the bottom axis of the motor, and a carbon brush barrel is fixedly installed on the bottom of the motor, the outer side of the bearing is movably installed on the inner bottom end of the bottom cover, and the bottom of the carbon brush barrel is fixedly installed on the inner bottom end of the bottom cover.

[0009] Preferably, a shock absorbing plate is movably mounted on a side of the handle close to the stator, and a switch capacitor is movably mounted on a side of the shock absorbing plate away from the stator, and the outer side of the switch capacitor is clamped with the inner side of the handle.

[0010] Preferably, the impact member includes a piston cylinder, a reset member is movably mounted on the outer side of one end of the piston cylinder close to the stator, the reset member includes a carbon brush, the inner side of the carbon brush is slidably connected to the outer side of the piston cylinder, a disc spring is movably mounted on the side of the carbon brush close to the stator, an air hole is penetrated through the end of the piston cylinder away from the stator, and the outer side of the piston cylinder is fixedly mounted to the inner side of the crankcase.

[0011] Preferably, an eccentric gear is fixedly mounted on the outer side of the eccentric wheel, one end of the eccentric gear is plugged into the inner side of the piston cylinder, a piston is fixedly mounted on one end of the eccentric gear, and an impact hammer is slidably connected to the inside of the piston cylinder.

[0012] Preferably, a first sealing ring is fixedly mounted on the inner side of one end of the piston cylinder close to the eccentric gear, the inner side of the first sealing ring is slidably connected to one end of the eccentric gear, and a blocking plate is fixedly mounted on the inner side of the other end of the piston cylinder.

[0013] Preferably, the steering sleeve includes an electric pick chuck, a pin hole is penetrated through one side of the electric pick chuck, a square sleeve is arranged on the inner side of the electric pick chuck, a buffer spring is movably installed on one end of the electric pick chuck close to the crankcase, a pressing sleeve is movably installed on one end of the buffer spring, and one end of the pressing sleeve is clamped with an end of the crankcase away from the stator.

[0014] Preferably, a cylinder is fixedly installed on the inner side of the pressing sleeve and the electric pick chuck, an impactor is slidably connected to the inside of the cylinder, a plurality of second sealing rings are evenly and fixedly installed on the outer side of the impactor, the outer side of the second sealing ring is slidably connected to the inner side of the cylinder, a retaining spring is clamped on the outer side of the cylinder, and one end of the retaining spring is clamped to the inner side of the crankcase.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the setting of the oil seal cover, when using the electric pick, hold the handle and press the shock-absorbing plate. After the switch capacitor supplies power to the motor, the motor drives the large gear to rotate through the rotor gear shaft, and the eccentric wheel is clamped on one side of the top of the large gear through the eccentric shaft pin. When the eccentric wheel rotates on the top of the large gear, the top of the eccentric shaft pin slides on the inside of the sleeve, and the sleeve limits the eccentric shaft pin to prevent the eccentric shaft pin from driving the eccentric gear due to the increase in the shaking range, thereby damaging the impact hammer and the piston cylinder. At the same time, the first bearing and the first skeleton oil seal limit the rotor gear shaft to prevent the rotor gear shaft from swinging violently when the high-speed rotation occurs, thereby protecting the rotor gear shaft and the teeth of the large gear from damage.

[0017] 2. Through the setting of the carbon brush, when the eccentric gear is driven by the eccentric wheel and squeezed into the piston cylinder, the impact hammer is impacted toward the impact sub-end through the piston. During the impact of the hammer, the air in the piston cylinder is squeezed into the crankcase through the air hole. The carbon brush in the crankcase slides along the outer wall of the piston cylinder toward the disc spring end due to the action of air pressure, squeezing the disc spring. When the eccentric gear is retracted, the extruded disc spring squeezes the air into the piston cylinder again due to the recovery of elastic deformation. The carbon brush is used to block it, thereby preventing the disc spring from softening and being damaged due to overheating, thereby extending the service life of the electric hammer.

[0018] 3. Through the setting of the steering sleeve, an impact hammer is installed in the electric pick chuck of the steering sleeve when in use, and four steel balls are movably installed on one end of the impact piece, and one end of the impact piece is clamped with one end of the steering sleeve through multiple steel balls, which is convenient for quick replacement of the impact hammer and daily maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a partially disassembled three-dimensional structure of an electric pick of the present invention;

[0020] Figure 2 A three-dimensional diagram of the bottom of an electric pick according to the present invention;

[0021] Figure 3 A three-dimensional diagram of the partial structure inside an electric pick of the present invention;

[0022] Figure 4 This is a three-dimensional diagram of the structure inside an electric pick of the present invention;

[0023] Figure 5 for Figure 4 A is an enlarged schematic diagram;

[0024] Figure 6 It is a structural schematic diagram of an electric pick of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the square sleeve of the present invention;

[0026] Figure 8 It is a schematic diagram of the impactor structure of the present invention.

[0027] In the figure: 1, stator; 2, handle; 3, crankcase; 4, stator housing; 5, impact piece; 6, steering sleeve; 7, buffer screw; 8, steel ball; 22, rotating shaft; 3, oil seal cover; 301, sleeve; 10, motor; 11, rotor gear shaft; 12, air guide cover; 18, first bearing; 1801, second bearing; 182, first skeleton oil seal; 15, large gear; 121, bearing steel wear-resistant sleeve; 161, eccentric shaft pin; 16, eccentric wheel; 40, bottom cover; 13 , bearing; 14, carbon brush barrel; 20, shock-absorbing plate; 21, switch capacitor; 50, piston cylinder; 51, reset piece; 511, carbon brush; 510, disc spring; 501, air hole; 17, eccentric gear; 53, piston; 52, impact hammer; 181, first sealing ring; 54, electric pick chuck; 5401, square sleeve; 542, pin hole; 541, buffer spring; 56, pressing sleeve; 57, cylinder; 55, impact pin; 551, second sealing ring; 58, retaining ring. DETAILED DESCRIPTION

[0028] Formula

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-6 The present invention provides a technical solution: an electric pick, comprising a stator 1, a handle 2, a crankcase 3, a stator shell 4, an impact piece 5 and a steering sleeve 6, the bottom inner side of the stator shell 4 is fixedly installed with the bottom outer side of the stator 1, the bottom of the handle 2 is movably installed with a rotating shaft 22, the top of the handle 2 is clamped with two buffer screws 7, the outer side of the rotating shaft 22 is movably installed with the bottom outer side of the stator shell 4, one end of the two buffer screws 7 is threadedly connected with the top end of the crankcase 3, the other end of the impact piece 5 is movably installed with the top of the stator 1, the end of the crankcase 3 close to the stator 1 is clamped with an oil seal cover 3, the bottom of the oil seal cover 3 is fixedly installed with a sleeve 301, the stator 1 comprises a motor 10, the top axis of the motor 10 is movably connected with a rotor gear shaft 11, the top outer side of the motor 10 is fixedly installed with an air guide cover 12, the top axis of the air guide cover 12 is movably installed with a first bearing 18 and a second bearing 1801, the first The first skeleton oil seal 182 is movably installed on the top of the bearing 18 and the second bearing 1801. The axis of the first skeleton oil seal 182 is sleeved with the outer side of the rotor gear shaft 11. The top outer side of the rotor gear shaft 11 is meshed with a large gear 15. A bearing steel wear-resistant sleeve 121 is fixedly installed on the top outer side of the air guide cover 12. The top of the bearing steel wear-resistant sleeve 121 is plugged with the bottom of the large gear 15. An eccentric shaft pin 161 is plugged on one side of the top of the large gear 15. The eccentric wheel 16 is plugged on the top outer side of the eccentric shaft pin 161. The top of the eccentric shaft pin 161 is movably connected to the inner side of the sleeve 301. A bottom cover 40 is fixedly installed on the bottom of the stator shell 4. A bearing 13 is sleeved on the bottom axis of the motor 10, and a carbon brush barrel 14 is fixedly installed on the bottom of the motor 10. The outer side of the bearing 13 is movably installed with the inner bottom end of the bottom cover 40, and the bottom of the carbon brush barrel 14 is fixedly installed with the inner bottom end of the bottom cover 40.

[0030] The working principle of this embodiment is as follows: when using this electric pick, hold the handle 2, press the damping plate 20, and after the switch capacitor 21 supplies power to the motor 10, the motor 10 drives the large gear 15 to rotate through the rotor gear shaft 11, and the eccentric wheel 16 is clamped on one side of the top of the large gear 15 through the eccentric shaft pin 161. When the eccentric wheel 16 rotates at the top of the large gear 15, the top of the eccentric shaft pin 161 slides inside the sleeve 301, and the sleeve 301 limits the eccentric shaft pin 161 to prevent the eccentric shaft pin 161 from driving the eccentric gear 17 due to the increased shaking range, thereby damaging the impact hammer 52 and the piston cylinder 50. At the same time, the first bearing 18, the second bearing 1801 and the first skeleton oil seal 182 limit the rotor gear shaft 11 to prevent the rotor gear shaft 11 from swinging violently when the high-speed rotation occurs, thereby protecting the teeth of the rotor gear shaft 11 and the large gear 15 from being damaged.

[0031] according to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the impact member 5 includes a piston cylinder 50, and a reset member 51 is movably installed on the outer side of one end of the piston cylinder 50 close to the stator 1. The reset member 51 includes a carbon brush 511. The inner side of the carbon brush 511 is slidably connected to the outer side of the piston cylinder 50. A coil spring 510 is movably installed on the side of the carbon brush 511 close to the stator 1. An air hole 501 is penetrated through the end of the piston cylinder 50 away from the stator 1. The outer side of the piston cylinder 50 is fixedly installed with the inner side of the crankcase 3. An eccentric gear 17 is fixedly installed on the outer side of the eccentric wheel 16. One end of the eccentric gear 17 is plugged into the inner side of the piston cylinder 50. A piston 53 is fixedly installed on one end of the eccentric gear 17. An impact hammer 52 is slidably connected to the inside of the piston cylinder 50. The inner side of the end of the piston cylinder 50 close to the eccentric gear 17 is fixedly installed. A first sealing ring 181 is installed, and the inner side of the first sealing ring 181 is slidably connected with one end of the eccentric gear 17. When the eccentric gear 17 is driven by the eccentric wheel 16 and squeezed into the piston cylinder 50, the impact hammer 52 is impacted toward the impact sub 55 end through the piston 53. During the impact of the hammer 52, the air in the piston cylinder 50 is squeezed into the crankcase 3 through the air hole 501. The carbon brush 511 in the crankcase 3 slides along the outer wall of the piston cylinder 50 toward the end of the coil spring 510 due to the action of air pressure, and squeezes the coil spring 510. When the eccentric gear 17 is retracted, the coil spring 510 is squeezed into the piston cylinder 50 again due to the elastic deformation recovery. The carbon brush 511 is used to block it, thereby preventing the coil spring 510 from softening and being damaged due to overheating, thereby extending the service life of the electric hammer;

[0032] according to Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the other end of the crankcase 3 is clamped with the outer side of one end of the steering sleeve 6, four steel balls 8 are movably installed at one end of the impact piece 5, and one end of the impact piece 5 is clamped with one end of the steering sleeve 6 through multiple steel balls 8, and the steering sleeve 6 includes an electric pick chuck 54, one side of the electric pick chuck 54 is penetrated with a pin hole 542, and the inner side of the electric pick chuck 54 is provided with a square sleeve 5401, and the end of the electric pick chuck 54 close to the crankcase 3 is movably installed with a buffer spring 541, and one end of the buffer spring 541 is movably installed with a pressing sleeve 56, one end of the pressing sleeve 56 is clamped with the end of the crankcase 3 away from the stator 1, and the inner sides of the pressing sleeve 56 and the electric pick chuck 54 are fixedly installed with a cylinder 57, and the interior of the cylinder 57 is slidably connected with an impact The striker 55 has a plurality of second sealing rings 551 uniformly and fixedly installed on the outer side of the striker 55, the outer side of the second sealing ring 551 is slidably connected to the inner side of the cylinder 57, the outer side of the cylinder 57 is clamped with a retaining spring 58, one end of the retaining spring 58 is clamped with the inner side of the crankcase 3, and the steering sleeve 6 is provided, the electric pick chuck 54 is clamped with the piston cylinder 50 through the pressing sleeve 56, and the impact striker 55 is fastened and installed by inserting a pin into the pin hole 542. When in use, an impact hammer is installed in the electric pick chuck 54 of the steering sleeve 6, and one end of the impact member 5 is movably installed with a plurality of steel balls 8, and one end of the impact member 5 is clamped with one end of the steering sleeve 6 through the plurality of steel balls 8, which is convenient for quick replacement of the impact hammer and daily maintenance and replacement.

[0033] In this technical solution, the motor 10 is a prior art and will not be elaborated on in detail here.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric pick, comprising a stator (1), a handle (2), a crankcase (3), a stator housing (4), an impact piece (5) and a steering sleeve (6), characterized in that: The inner side of the bottom of the stator shell (4) is fixedly mounted on the outer side of the bottom of the stator (1); a rotating shaft (22) is movably mounted on the bottom of the handle (2); two buffer screws (7) are clamped on the top of the handle (2); the outer side of the rotating shaft (22) is movably mounted on the outer side of the bottom of the stator shell (4); one end of the two buffer screws (7) is threadedly connected to one end of the top of the crankcase (3); the other end of the crankcase (3) is clamped on the outer side of one end of the steering sleeve (6); one end of the impact piece (5) is movably mounted with four steel balls (8), and one end of the impact piece (5) is clamped on one end of the steering sleeve (6) through multiple steel balls (8); the other end of the impact piece (5) is movably mounted on the top of the stator (1); an oil seal cover is clamped on one end of the crankcase (3) close to the stator (1); a sleeve (301) is fixedly mounted on the bottom of the oil seal cover; The stator (1) comprises an electric motor (10), wherein a rotor gear shaft (11) is movably connected to the top axis of the electric motor (10), an air guide cover (12) is fixedly installed on the top outer side of the electric motor (10), a first bearing (18) and a second bearing (1801) are movably installed to the top axis of the air guide cover (12), a first skeleton oil seal (182) is movably installed on the top of the first bearing (18) and the second bearing (1801), and the axis of the first skeleton oil seal (182) is connected to the rotor gear shaft (11). ), the outer side of the top of the rotor gear shaft (11) is meshedly connected with a large gear (15), the outer side of the top of the wind guide cover (12) is fixedly installed with a bearing steel wear-resistant sleeve (121), the top of the bearing steel wear-resistant sleeve (121) is plugged with the bottom of the large gear (15), an eccentric shaft pin (161) is plugged into one side of the top of the large gear (15), the outer side of the top of the eccentric shaft pin (161) is plugged into an eccentric wheel (16), and the top of the eccentric shaft pin (161) is movably connected to the inner side of the sleeve (301); A bottom cover (40) is fixedly mounted on the bottom of the stator housing (4), a bearing (13) is sleeved at the bottom axis of the motor (10), and a carbon brush barrel (14) is fixedly mounted on the bottom of the motor (10), the outer side of the bearing (13) is movably mounted on the inner bottom end of the bottom cover (40), and the bottom of the carbon brush barrel (14) is fixedly mounted on the inner bottom end of the bottom cover (40); the impact member (5) comprises a piston cylinder (50), a reset member (51) is movably mounted on the outer side of one end of the piston cylinder (50) close to the stator (1), and the reset member (51) comprises a carbon brush (511), the inner side of the carbon brush (511) is slidably connected to the outer side of the piston cylinder (50), and a disc spring (511) is movably mounted on the side of the carbon brush (511) close to the stator (1). 10), an air hole (501) is formed through one end of the piston cylinder (50) away from the stator (1), and the outer side of the piston cylinder (50) is fixedly mounted on the inner side of the crankcase (3); an eccentric gear (17) is fixedly mounted on the outer side of the eccentric wheel (16), one end of the eccentric gear (17) is plugged into the inner side of the piston cylinder (50), a piston (53) is fixedly mounted on one end of the eccentric gear (17), and an impact hammer (52) is slidably connected inside the piston cylinder (50); a first sealing ring (181) is fixedly mounted on the inner side of one end of the piston cylinder (50) close to the eccentric gear (17), the inner side of the first sealing ring (181) is slidably connected to one end of the eccentric gear (17), and a baffle is fixedly mounted on the inner side of the other end of the piston cylinder (50).

2. An electric pick according to claim 1, characterized in that: A shock absorbing plate (20) is movably mounted on the side of the handle (2) close to the stator (1), and a switch capacitor (21) is movably mounted on the side of the shock absorbing plate (20) away from the stator (1), and the outer side of the switch capacitor (21) is clamped with the inner side of the handle (2).

3. An electric pick according to claim 1, characterized in that: The steering sleeve (6) includes an electric pick chuck (54), a pin hole (542) is formed through one side of the electric pick chuck (54), a buffer spring (541) is movably mounted on one end of the electric pick chuck (54) close to the crankcase (3), a pressing sleeve (56) is movably mounted on one end of the buffer spring (541), and one end of the pressing sleeve (56) is clamped with an end of the crankcase (3) away from the stator (1).

4. An electric pick according to claim 3, characterized in that: A cylinder (57) is fixedly installed on the inner side of the pressing sleeve (56) and the electric pick chuck (54), and an impactor (55) is slidably connected inside the cylinder (57). A plurality of second sealing rings (551) are evenly fixedly installed on the outer side of the impactor (55), and the outer side of the second sealing ring (551) is slidably connected to the inner side of the cylinder (57). A retaining spring (58) is clamped on the outer side of the cylinder (57), and one end of the retaining spring (58) is clamped on the inner side of the crankcase (3).

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