CN216422453U

CN216422453U - Electric pick

Info

Publication number: CN216422453U
Application number: CN202121916033.2U
Authority: CN
Inventors: 周金轩
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-05-03
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses an electric pick which comprises a stator, a handle, a crank case, a stator shell, an impact piece and a steering sleeve, wherein the inner side of the bottom of the stator shell and the outer side of the bottom of the stator are fixedly arranged, and a rotating shaft is movably arranged at the bottom of the handle. This electric pick, setting through the oil blanket lid, the hand is held to the hand when using this electric pick, press down the shock attenuation piece, switched capacitor is after the motor power supply, the motor drives the gear wheel rotation through the rotor tooth axle, and gear wheel top one side has the eccentric wheel through eccentric shaft round pin joint, the eccentric wheel is when gear wheel top is rotatory, eccentric shaft top slides at the sleeve inboard, the sleeve then carries on spacingly to eccentric shaft, avoid eccentric shaft to drive eccentric gear because of the rocking range increase, damage impact sledgehammer and piston cylinder, and simultaneously, first bearing and first skeleton oil blanket carry on spacingly to the rotor tooth axle, the condition that takes place acutely to sway when avoiding rotor tooth axle high-speed rotation, protection rotor tooth axle and gear tooth of gear are not damaged.

Description

Electric pick

Technical Field

The utility model relates to the technical field of electric tools, in particular to an electric pick.

Background

The electric pick is a double-insulation hand-held electric tool taking a single-phase series motor as power, has the characteristics of safety, reliability, high efficiency, convenient operation and the like, is widely applied to pipeline laying, mechanical installation, water supply and drainage facility construction, interior decoration, harbor facility construction and other construction engineering construction, and is suitable for pick borers or other appropriate accessories, such as chisels, shovels and the like, to carry out crushing, chiseling, digging, grooving, cutting and other operations on concrete, masonry structures and asphalt pavements.

In the prior art, for example, Chinese patent numbers are: the "electric pick" of CN 112824054 a, includes: the reduction box comprises a box body and a transmission mechanism arranged in the box body; the impact mechanism comprises a piston cylinder, an impact sledge hammer component driven by the transmission mechanism, an impactor arranged in the piston cylinder and driven by the impact sledge hammer component to reciprocate, and a striker rod arranged in the piston cylinder and used for bearing impact of the impactor, wherein a first end of the piston cylinder is connected and positioned in the box body, and a second end, opposite to the first end, of the piston cylinder is provided with an electric pick chuck; and the plastic shell is sleeved outside the piston cylinder. Above-mentioned electric pick, piston cylinder connection location reducing gear box, the piston cylinder obtains better location support on the one hand, and on the other hand adopts the scheme of the straight section of thick bamboo of metal, and plastics shell weight is lighter, has alleviateed complete machine weight greatly, makes the operation more nimble convenient. However, in the prior art, the eccentric wheel drives the eccentric gear and the rotor gear shaft to shake within a certain range due to the inertia effect in the high-speed rotation process, so that the impact sledge hammer and the inner side of the piston cylinder are subjected to side collision friction and swing with the rotor gear shaft, the impact sledge hammer and the gear are damaged, and even the motor is burnt due to tooth clamping.

We have therefore proposed an electric pick in order to solve the problems set out above.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electric pick, which solves the problems that in the process of high-speed rotation of an eccentric wheel in the background technology, an eccentric gear and a rotor gear shaft are driven to shake in a certain range due to the inertia effect, so that a large impact hammer collides and rubs with the inner side of a piston cylinder in a side direction, the rotor gear shaft swings, the large impact hammer and the gear are damaged, and even a motor is burnt due to tooth clamping.

In order to achieve the purpose, the utility model provides the following technical scheme: the electromagnetic clutch comprises 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, a rotating shaft is movably installed at the bottom of the handle, two buffering screws are clamped at the top of the handle, the outer side of the rotating shaft is movably installed with the outer side of the bottom of the stator shell, one ends of the two buffering screws are in threaded connection with one end of the top of the crankcase, the other end of the crankcase is clamped with the outer side of one end of the steering sleeve, four steel balls are movably installed at one end of the impact piece, one end of the impact piece is clamped with one end of the steering sleeve through the plurality of steel balls, the other end of the impact piece is movably installed with the top of the stator, an oil seal cover is clamped at one end of the crankcase close to the stator, and a sleeve is fixedly installed at the bottom of the oil seal cover;

the stator comprises a motor, a rotor toothed shaft is movably connected to the top axle center of the motor, a wind guide cover is fixedly mounted on the outer side of the top of the motor, a first bearing and a second bearing are movably mounted on the top axle center of the wind guide cover, a first framework oil seal is movably mounted on the tops of the first bearing and the second bearing, the axle center of the first framework oil seal is sleeved with the outer side of the rotor toothed shaft, the outer side of the top of the rotor toothed shaft is connected with a large gear in a meshed mode, a bearing steel wear-resistant sleeve is fixedly mounted on the outer side of the top of the wind guide cover, the top of the bearing steel wear-resistant sleeve is connected with the bottom of the large gear in an inserted mode, an eccentric shaft pin is connected to one side of the top of the large gear in an inserted mode, an eccentric wheel is connected to the outer side of the top of the eccentric shaft in an inserted mode, and the top of the eccentric shaft is movably connected with the inner side of a sleeve.

Preferably, the bottom of the stator shell is fixedly provided with a bottom sealing cover, the bottom axis of the motor is sleeved with a bearing, the bottom of the motor is fixedly provided with a carbon brush barrel, the outer side of the bearing is movably mounted with the inner bottom end of the bottom sealing cover, and the bottom of the carbon brush barrel is fixedly mounted with the inner bottom end of the bottom sealing cover.

Preferably, one side movable mounting that the hand (hold) is close to the stator has the shock attenuation piece, one side movable mounting that the stator was kept away from to the shock attenuation piece has switched capacitor, switched capacitor's the outside and the inboard joint of hand (hold).

Preferably, the impact piece includes the piston cylinder, the one end outside movable mounting that is close to the stator of piston cylinder has the piece that resets, the piece that resets includes the carbon brush, the inboard of carbon brush and the outside sliding connection of piston cylinder, one side movable mounting that the carbon brush is close to the stator has the coil spring, the one end that the stator was kept away from to the piston cylinder runs through and has seted up the gas pocket, the inboard fixed mounting of the outside of piston cylinder and crankcase.

Preferably, an eccentric gear is fixedly mounted on the outer side of the eccentric wheel, one end of the eccentric gear is inserted into the inner side of the piston cylinder, a piston is fixedly mounted at one end of the eccentric gear, and an impact sledge hammer is connected to the inner portion of the piston cylinder in a sliding mode.

Preferably, a first sealing ring is fixedly mounted on the inner side of one end, close to the eccentric gear, of the piston cylinder, the inner side of the first sealing ring is in sliding connection with one end of the eccentric gear, and a blocking piece is fixedly mounted on the inner side of the other end of the piston cylinder.

Preferably, turn to the cover and include the electric pick chuck, the bolt hole has been run through to one side of electric pick chuck, inside one side of electric pick chuck is provided with the square cover, the one end movable mounting that the electric pick chuck is close to the crankcase has buffer spring, buffer spring's one end movable mounting has the pressure cover, the one end of pressing the cover and the crankcase one end joint of keeping away from the stator.

Preferably, the inboard fixed mounting of pressing cover and electric pick chuck has the cylinder, the inside sliding connection of cylinder has the impactor, the even fixed mounting in the outside of impactor has a plurality of second sealing rings, the outside of second sealing ring and the inboard sliding connection of cylinder, the outside joint of cylinder has the jump ring, the one end of jump ring and the inboard joint of crankcase.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the arrangement of the oil seal cover, when the electric pick is used, a user holds the handle by hand, presses down the damping sheet, and after the switched capacitor supplies power to the motor, the motor drives the large gear to rotate through the rotor gear shaft, one side of the top of the large gear is connected with the eccentric wheel in a clamping manner through the eccentric shaft pin, when the eccentric wheel rotates at the top of the large gear, the top of the eccentric shaft pin slides at the inner side of the sleeve, the sleeve limits the eccentric shaft pin, so that the eccentric gear is prevented from being driven by the eccentric shaft pin due to the increase of the shaking range, the damage to the hammer and the piston cylinder is prevented, meanwhile, the first bearing and the first framework oil seal limit the rotor gear shaft, the severe swinging of the rotor gear shaft during high-speed rotation is avoided, and the teeth of the rotor gear shaft and the teeth of the large gear are protected from being damaged;

2. through the arrangement of the carbon brush, when the eccentric gear is driven by the eccentric wheel and is extruded into the piston cylinder, the impact sledge hammer is impacted to the impact sub end through the piston, air in the piston cylinder is extruded into the crank case through the air hole in the impact sledge hammer process, the carbon brush in the crank case slides to the coil spring end along the outer wall of the piston cylinder under the action of air pressure to extrude the coil spring, when the eccentric gear is retracted, the air is extruded into the piston cylinder again through the extrusion coil spring due to elastic deformation recovery, the carbon brush is used for blocking, further, the coil spring is prevented from being softened and damaged due to overheating, and the service life of the electric hammer is prolonged;

3. through the steering sleeve that sets up, install in the electric pick chuck of steering sleeve when using and strike the sledgehammer, strike the one end movable mounting of piece again and have four steel balls, and the one end of striking the piece through a plurality of steel balls and the one end joint that turns to the sleeve, make things convenient for quick replacement to strike the sledgehammer and be convenient for daily maintenance to change.

Drawings

Fig. 1 is a schematic perspective view of a partially disassembled electric pick of the present invention;

fig. 2 is a perspective view of the bottom of the electric pick of the present invention;

fig. 3 is a perspective view of a part of the internal structure of the electric pick of the present invention;

fig. 4 is a perspective view of the internal structure of the electric pick of the present invention;

FIG. 5 is an enlarged view of the point A in FIG. 4;

fig. 6 is a schematic structural view of an electric pick of the present invention;

FIG. 7 is a schematic view of a square sleeve structure of the present invention

FIG. 8 is a schematic view of the structure of the impactor of the utility model.

In the figure:

1. a stator; 2. a handle; 3. a crankcase; 4. a stator housing; 5. an impact member; 6. a steering sleeve; 7. a buffer screw; 8. steel balls; 22. a rotating shaft; 30. sealing the oil cover; 301. a sleeve; 10. an electric motor; 11. a rotor gear shaft; 12. a wind guide cover; 18. a first bearing; 1801. a second bearing; 182. a first framework oil seal; 15. a bull gear; 121. a bearing steel wear-resistant sleeve; 161. an eccentric shaft pin; 16. an eccentric wheel; 40. a bottom sealing cover; 13. a bearing; 14. a carbon brush barrel; 20. a damping sheet; 21. a switched capacitor; 50. a piston cylinder; 51. A reset member; 511. a carbon brush; 510. a coil spring; 501. air holes; 17. an eccentric gear; 53. a piston; 52. Impacting a sledge hammer; 181. a first seal ring; 54. an electric pick chuck; 5401. a square sleeve is sleeved; 542. a pin hole; 541. a buffer spring; 56. pressing the sleeve; 57. a cylinder; 55. an impactor; 551. a second seal ring; 58. and a clamp spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: an electric pick comprises a stator 1, a handle 2, a crankcase 3, a stator shell 4, an impact piece 5 and a steering sleeve 6, wherein the inner side of the bottom of the stator shell 4 is fixedly installed with the outer side of the bottom of the stator 1, a rotating shaft 22 is movably installed at the bottom of the handle 2, two buffering screws 7 are clamped at the top of the handle 2, the outer side of the rotating shaft 22 is movably installed with the outer side of the bottom of the stator shell 4, one ends of the two buffering screws 7 are in threaded connection with one end of the top of the crankcase 3, the other end of the impact piece 5 is movably installed with the top of the stator 1, an oil seal cover 30 is clamped at one end of the crankcase 3 close to the stator 1, a sleeve 301 is fixedly installed at the bottom of the oil seal cover 30, the stator 1 comprises a motor 10, a rotor gear shaft 11 is movably connected at the top axle center of the motor 10, an air guide cover 12 is fixedly installed at the outer side of the top of the motor 10, a first bearing 18 and a second bearing 1801 are movably installed at the top axle center of the air guide cover 12, a first framework oil seal 182 is movably mounted at the top of the first bearing 18 and the second bearing 1801, the axis of the first framework oil seal 182 is sleeved with the outer side of the rotor gear shaft 11, the outer side of the top of the rotor gear shaft 11 is engaged with the large gear 15, a bearing steel wear-resistant sleeve 121 is fixedly mounted at the outer side of the top of the air guide cover 12, the top of the bearing steel wear-resistant sleeve 121 is inserted with the bottom of the large gear 15, an eccentric shaft pin 161 is inserted into one side of the top of the large gear 15, an eccentric wheel 16 is inserted into the outer side of the top of the eccentric shaft pin 161, the top of the eccentric shaft pin 161 is movably connected with the inner side of the sleeve 301, a bottom seal cover 40 is fixedly mounted at the bottom of the stator shell 4, a bearing 13 is sleeved at the axis of the bottom of the motor 10, and the bottom of the motor 10 is fixedly provided with a carbon brush barrel 14, the outer side of the bearing 13 is movably arranged with the inner bottom end of the bottom sealing cover 40, and the bottom of the carbon brush barrel 14 is fixedly arranged with the inner bottom end of the bottom sealing cover 40.

The working principle of the embodiment is as follows: when the electric pick is used, a user holds the handle 2 by hand, presses down the damping sheet 20, 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, 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 on the top of the large gear 15, the top of the eccentric shaft pin 161 slides on the inner side of the sleeve 301, the sleeve 301 limits the eccentric shaft pin 161, the eccentric gear 17 is prevented from being driven by the eccentric shaft pin 161 due to the increase of the shaking range, the hammer 52 and the piston cylinder 50 are prevented from being damaged and impacted, meanwhile, the first bearing 18, the second bearing 1801 and the first framework oil seal 182 limit the rotor gear shaft 11, the condition that the rotor gear shaft 11 is violently swung during high-speed rotation is avoided, and the teeth of the rotor gear shaft 11 and the large gear 15 are prevented from being damaged;

according to fig. 1, 3, 4, 5 and 6, 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, the reset member 51 comprises a carbon brush 511, the inner side of the carbon brush 511 is slidably connected with the outer side of the piston cylinder 50, a coil spring 510 is movably mounted on one side of the carbon brush 511 close to the stator 1, an air hole 501 is formed in one end of the piston cylinder 50 far away from the stator 1, the outer side of the piston cylinder 50 is fixedly mounted with 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 inserted into the inner side of the piston cylinder 50, a piston 53 is fixedly mounted at one end of the eccentric gear 17, an impact sledge 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, 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 is extruded into the piston cylinder 50, the impact sledge hammer 52 is impacted to the end of the impact member 55 through the piston 53, air in the piston cylinder 50 is extruded into the crank case 3 through the air hole 501 in the process of impacting the sledge hammer 52, the carbon brush 511 in the crank case 3 slides to the end of the coil spring 510 along the outer wall of the piston cylinder 50 due to the air pressure effect, the coil spring 510 is extruded, when the eccentric gear 17 is retracted, the air is extruded into the piston cylinder 50 again due to the elastic deformation recovery of the extrusion coil spring 510, the carbon brush 511 is used for blocking, the coil spring 510 is prevented from being softened and damaged due to overheating, and the service life of the electric hammer is prolonged;

according to the drawings of fig. 1, 2, 4 and 6, the other end of the crankcase 3 is clamped with the outer side of one end of a steering sleeve 6, one end of an impact piece 5 is movably provided with four steel balls 8, one end of the impact piece 5 is clamped with one end of the steering sleeve 6 through the steel balls 8, the steering sleeve 6 comprises a pick chuck 54, one side of the pick chuck 54 is provided with a bolt hole 542 in a penetrating way, one side of the inside of the pick chuck 54 is provided with a square sleeve 5401, one end of the pick chuck 54 close to the crankcase 3 is movably provided with a buffer spring 541, one end of the buffer spring 541 is movably provided with a pressing sleeve 56, one end of the pressing sleeve 56 is clamped with one end of the crankcase 3 far away from the stator 1, the inner sides of the pressing sleeve 56 and the pick chuck 54 are fixedly provided with an air cylinder 57, the inside of the air cylinder 57 is connected with an impact piece 55 in a sliding way, the outer side of the impact piece 55 is uniformly and fixedly provided with a plurality of second sealing rings 551, the outer side of the second sealing rings 551 is connected with the inner side of the air cylinder 57 in a sliding way, the outside joint of cylinder 57 has jump ring 58, the inboard joint of the one end of jump ring 58 and crankcase 3, through the cover 6 that turns to that sets up, electric pick chuck 54 is through pressing cover 56 and piston cylinder 50 joint, and strike the impacter 55 and insert bolt hole 542 fastening installation through the round pin, turn to and install the impact sledgehammer in the electric pick chuck 54 of cover 6 when using, the one end movable mounting of impact member 5 has a plurality of steel balls 8 again, and the one end of impact member 5 is through a plurality of steel balls 8 and the one end joint that turns to cover 6, make things convenient for quick replacement to strike the sledgehammer and be convenient for daily maintenance to change.

In this embodiment, the motor 10 is a prior art and will not be described herein.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides an electric pick, includes stator (1), hand (2), crankcase (3), stator shell (4), impact piece (5) and turns to cover (6), its characterized in that: the bottom outer side of the stator shell (4) is fixedly mounted with the bottom inner side of the stator (1), the bottom of the handle (2) is movably mounted with a rotating shaft (22), the top of the handle (2) is connected with two buffering screws (7), the outer side of the rotating shaft (22) is movably mounted with the bottom outer side of the stator shell (4), one end of each buffering screw (7) is connected with one end of the top of the crankcase (3) in a threaded manner, the other end of the crankcase (3) is connected with the outer side of one end of the steering sleeve (6) in a clamped manner, one end of the impact piece (5) is movably mounted with four steel balls (8), one end of the impact piece (5) is connected with one end of the steering sleeve (6) in a clamped manner through the steel balls (8), the other end of the impact piece (5) is movably mounted with the top of the stator (1), one end of the crankcase (3) close to the stator (1) is connected with an oil sealing cover (30) in a clamped manner, a sleeve (301) is fixedly arranged at the bottom of the oil seal cover (30);

the stator (1) comprises a motor (10), a rotor toothed shaft (11) is movably connected to the top axle center of the motor (10), a wind guide cover (12) is fixedly installed on the outer side of the top of the motor (10), a first bearing (18) and a second bearing (1801) are movably installed on the top axle center of the wind guide cover (12), a first framework oil seal (182) is movably installed on the tops of the first bearing (18) and the second bearing (1801), the axle center of the first framework oil seal (182) is sleeved with the outer side of the rotor toothed shaft (11), a large gear (15) is meshed and connected to the outer side of the top of the rotor toothed shaft (11), a bearing steel wear-resistant sleeve (121) is fixedly installed on the outer side of the top of the wind guide cover (12), the top of the bearing steel wear-resistant sleeve (121) is inserted and connected with the bottom of the large gear (15), and an eccentric shaft pin (161) is inserted and connected to one side of the top of the large gear (15), an eccentric wheel (16) is inserted and connected to the outer side of the top of the eccentric shaft pin (161), and the top of the eccentric shaft pin (161) is movably connected with the inner side of the sleeve (301).

2. An electric pick of claim 1, wherein: the bottom fixed mounting of stator shell (4) has end closing cap (40), bearing (13) have been cup jointed in the bottom axle center department of motor (10), and the bottom fixed mounting of motor (10) has carbon brush bucket (14), the outside of bearing (13) and the inside bottom movable mounting of end closing cap (40), the bottom of carbon brush bucket (14) and the inside bottom fixed mounting of end closing cap (40).

3. An electric pick of claim 1, wherein: one side movable mounting that hand (2) are close to stator (1) has shock attenuation piece (20), one side movable mounting that stator (1) were kept away from in shock attenuation piece (20) has switched capacitor (21), the outside of switched capacitor (21) and the inboard joint of hand (2).

4. An electric pick of claim 1, wherein: impact member (5) include piston cylinder (50), the one end outside movable mounting that is close to stator (1) of piston cylinder (50) has reset piece (51), reset piece (51) including carbon brush (511), the inboard outside sliding connection with piston cylinder (50) of carbon brush (511), one side movable mounting that carbon brush (511) are close to stator (1) has disc spring (510), the one end that stator (1) were kept away from in piston cylinder (50) runs through and sets up gas pocket (501), the inboard fixed mounting of the outside and crankcase (3) of piston cylinder (50).

5. An electric pick of claim 4, wherein: the outer side of the eccentric wheel (16) is fixedly provided with an eccentric gear (17), one end of the eccentric gear (17) is inserted into the inner side of the piston cylinder (50), one end of the eccentric gear (17) is fixedly provided with a piston (53), and the inner part of the piston cylinder (50) is connected with an impact sledge hammer (52) in a sliding mode.

6. An electric pick of claim 5, wherein: a first sealing ring (181) is fixedly mounted on the inner side of one end, close to the eccentric gear (17), of the piston cylinder (50), and the inner side of the first sealing ring (181) is in sliding connection with one end of the eccentric gear (17).

7. An electric pick of claim 1, wherein: turn to cover (6) including electric pick chuck (54), bolt hole (542) have been run through to one side of electric pick chuck (54), inside one side of electric pick chuck (54) is provided with square cover (5401), the one end movable mounting that electric pick chuck (54) is close to crankcase (3) has buffer spring (541), the one end movable mounting of buffer spring (541) has pressure cover (56), the one end of pressing cover (56) and crankcase (3) keep away from the one end joint of stator (1).

8. An electric pick of claim 7, wherein: the inner side of the pressing sleeve (56) and the electric pick chuck (54) is fixedly provided with an air cylinder (57), the inner part of the air cylinder (57) is connected with an impactor (55) in a sliding manner, the outer side of the impactor (55) is uniformly and fixedly provided with a plurality of second sealing rings (551), the outer side of each second sealing ring (551) is connected with the inner side of the air cylinder (57) in a sliding manner, the outer side of the air cylinder (57) is clamped with a clamp spring (58), and one end of the clamp spring (58) is clamped with the inner side of the crankcase (3).