CN215395048U - Light electric hammer - Google Patents

Abstract

The utility model discloses a light electric hammer, which comprises a machine shell, a motor, an intermediate cover, a heat dissipation mechanism, a function conversion mechanism and an impact mechanism, wherein the motor is positioned in the machine shell, the output end of the motor is provided with a motor shaft, one end of the motor shaft is connected with the function conversion mechanism, the impact mechanism is arranged on the intermediate cover, one end of the impact mechanism is connected with the intermediate shaft, and the function conversion mechanism consists of a function knob, an intermediate shaft, a swing rod bearing, a third gear, a fourth gear, an upper clutch sleeve, a lower clutch sleeve and a shifting fork assembly; the utility model relates to a hydraulic hammer, which comprises a function switching mechanism, wherein the function switching mechanism is composed of an intermediate shaft, a shifting fork assembly and a swing rod bearing, all the assemblies are mutually matched, and the sliding connection state among the swing rod bearing, the shifting fork assembly and the intermediate shaft is adjusted through the rotation of a function knob, so that the hydraulic hammer can respectively realize a hammer gear working mode, a drill gear working mode and a hammer and drill gear working mode, and the hydraulic hammer is more flexible to use.

Description

Light electric hammer

Technical Field

The utility model belongs to the technical field of electric hammers, and particularly relates to a light electric hammer.

Background

The electric hammer is an electric rotary hammer drill with a safety clutch and a pneumatic hammering mechanism, the electric hammer utilizes the principle of piston motion, compressed gas impacts a drill bit, great strength is not needed by hands, holes of 6-100 mm can be formed in hard materials such as concrete, bricks and stones, the electric hammer is high in hole forming efficiency on the materials, but holes cannot be formed in metal.

The existing electric hammer is used, a hammer head or a drill bit of the existing electric hammer is installed at the end part of the existing electric hammer and then put into use, but the functions of the existing electric hammer cannot be converted in use, so that the using function of the existing electric hammer is single, and meanwhile, the problem that the hammer head part of the existing device is easy to generate high temperature in use is solved, so that the light electric hammer is provided.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a lightweight electric hammer that solves the problems set forth above in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a light electric hammer comprises a shell, a motor, an intermediate cover, a heat dissipation mechanism, a function conversion mechanism and an impact mechanism, wherein the motor is positioned inside the shell, a motor shaft is arranged at the output end of the motor, one end of the motor shaft is connected with the function conversion mechanism, the impact mechanism is arranged on the intermediate cover, one end of the impact mechanism is connected with the intermediate shaft, the function conversion mechanism consists of a function knob, an intermediate shaft, a swing rod bearing, a third gear, a fourth gear, an upper clutch sleeve, a lower clutch sleeve and a shifting fork assembly, the upper clutch sleeve and the lower clutch sleeve are both sleeved at two ends of the intermediate shaft, a second gear is arranged between the intermediate shaft and the motor shaft and is fixed on the intermediate shaft, a first bearing is arranged at one end of the intermediate shaft, the top of the first bearing is fixed with the intermediate cover, and the first bearing and the intermediate cover are fixed through a bearing pressing plate and screws, the swing rod bearing is connected with the intermediate shaft, a shifting fork assembly is arranged between the function knob and the intermediate shaft, the shifting fork assembly is composed of an upper shifting fork and a lower shifting fork, the upper shifting fork and the lower shifting fork are sleeved on the guide pillar, a large pressure spring is sleeved outside one end of the guide pillar, a middle cover is fixed at the top end of the guide pillar, the function knob and the knob seat are fixed and then rotate to generate an eccentric distance, so that the upper shifting fork and the lower shifting fork move to slide in linkage with an upper clutch sleeve and a lower clutch sleeve of the intermediate shaft. The positioning shifting fork, the upper shifting fork and the lower shifting fork are respectively provided with a clutch upper sleeve and a clutch lower sleeve, the surface of the intermediate shaft is fixed with a spline, spline grooves are formed in the inner walls of the clutch upper sleeve and the clutch lower sleeve, the spline grooves are connected in a matched mode and slide, the inner sleeve is sleeved on the outer portion of the swing rod bearing, the double-raceway steel ball groove and the retainer are sleeved on the outer portion of the inner sleeve, and the swing rod is arranged at one end of the inner sleeve.

Preferably, the outer wall of the inner sleeve is provided with double-raceway steel ball grooves, the steel balls are arranged on the double-raceway steel ball grooves, the intermediate shaft is further connected with a third gear, a gear box is arranged outside the third gear and fixed at one end of the casing, a bearing chamber is arranged inside the gear box, the end part of the intermediate shaft is connected with two or one second bearing, and the second bearing is connected with the bearing chamber.

Preferably, the impact mechanism is composed of a cylinder, an aluminum cylinder, a cylinder pin, an impact piston and an impact rod, the impact piston reciprocates in the aluminum cylinder to impact the impact rod, the impact rod impacts the operation tool, and the cylinder pin is connected between the aluminum cylinder and the swing rod bearing.

Preferably, an included angle between the swing rod bearing and the inner sleeve is 18-22 degrees, the second gear is connected with the motor shaft in a meshed mode, and one end of the first bearing is connected with the bearing sleeve.

Preferably, the heat dissipation mechanism is composed of a heat radiator, the heat radiator is fixed on the gear box, one end of the heat radiator is provided with an air inlet, the air inlet is an outlet air duct of the electric hammer, the other end of the heat radiator is provided with an air outlet, and the appearance of the heat radiator is matched with that of the gear box.

Preferably, the other end of casing is provided with handle mechanism, handle mechanism comprises D type handle, gripping handle and shockproof locating plate, rotationally connect through the round pin axle between one end of gripping handle and the D type handle, shockproof locating plate fixes on gripping handle's the other end, D type handle's one end is provided with shockproof clamp plate, be connected with shockproof spring between shockproof clamp plate and the shockproof locating plate, bolt has run through to shockproof spring's inboard, the one end of bolt is fixed on gripping handle, the other end of bolt is connected with the nut, the nut sets up on D type handle.

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

(1) through the designed function switching mechanism which is composed of a middle shaft, a shifting fork assembly and a swing rod bearing, all the assemblies are mutually matched, the sliding connection state among the swing rod bearing, the shifting fork assembly and the middle shaft is adjusted through the rotation of a function knob, and further the utility model can respectively realize a hammer gear working mode, a drill gear working mode and a hammer and drill gear working mode, so that the utility model is more flexible to use, the function is convenient to be rotationally switched from the outside through the designed function knob, the strength of the angle of 18-20 degrees of the swing rod bearing is ensured through the designed double-raceway steel ball structure of the swing rod bearing, the power transmission is realized through the swing rod bearing provided by the designed impact mechanism, the included angle between the swing rod bearing and an inner sleeve is 18-22 degrees, a large angle is adopted, the stroke is increased, and the impact power is increased, thereby improving the working efficiency.

(2) Through the radiator of design, the radiator of an external aluminium type material of gear box, do benefit to the heat dissipation, the function has just externally connected a radiator, do benefit to and reduce the gear box temperature, there is the air outlet on the radiator simultaneously, air duct in the air outlet entering reducing gear box on through the casing, accelerate the radiator radiating action, D type handle and the handle of gripping through the design, D type handle has the intensity and the operating comfort level of reinforcing electric hammer, through the shockproof locating plate of installation between the two, the bolt, shockproof spring, shockproof rubber sleeve, shockproof clamp plate, the nut, make it utilize elasticity between the elasticity damping piece to absorb the vibration that produces because of the hammering subassembly in the operation, after adopting this shockproof structure, the vibrations volume on holding the handle reduces greatly, increase operator comfort.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the function switching mechanism of the present invention;

FIG. 3 is a perspective view of the present invention functional switching mechanism;

FIG. 4 is a schematic view of the construction of the gear box of the present invention;

FIG. 5 is a schematic view of the construction of the rocker bearing of the present invention;

FIG. 6 is a schematic view of the position of the key slot on the clutch lower sleeve according to the present invention;

FIG. 7 is an assembly view of the bearing rocker of the present invention positioned within a functional shifter;

FIG. 8 is a schematic view of the fork assembly of the present invention;

FIG. 9 is a schematic structural view of the handle mechanism of the present invention;

FIG. 10 is a schematic structural diagram of a heat dissipation mechanism according to the present invention;

in the figure: 1. a second bearing; 2. an intermediate cover; 3. separating the upper sleeve; 4. a clutch lower sleeve; 5. a swing rod bearing; 6. a bearing housing; 7. a bearing pressure plate; 8. a first bearing; 9. a seal ring; 11. positioning a shifting fork; 12. an upper shifting fork; 13. a function knob; 14. a lower shifting fork; 15. a screw; 16. an intermediate shaft; 17. a second gear; 18. a guide post; 19. a third gear; 20. a large pressure spring; 21. a fork assembly; 22. a fourth gear; 25. a cylinder pin; 26. an aluminum cylinder; 27. an impact piston; 28. an impact bar; 35. a grip handle; 36. a bolt; 37. a shockproof positioning plate; 38. a shock-proof spring; 39. a shockproof rubber sleeve; 40. a shockproof pressing plate; 41. a nut; 42. a D-shaped handle; 45. a housing; 46. a motor; 47. a cylinder; 48. a gear case; 49. a motor shaft; 50. a work tool; 55. a heat sink; 5-1, a swing rod; 5-2, steel balls; 5-3, an inner sleeve; 5-4, a retainer; 5-5, an inner sleeve key groove; 5-6: the inner sleeve is provided with a double-raceway steel ball groove.

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 of the 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.

Examples

Referring to fig. 1 to 10, the present invention provides a technical solution: a light electric hammer comprises a shell 45, a motor 46, a heat dissipation mechanism, a function conversion mechanism and an impact mechanism, wherein the function conversion mechanism is designed to comprise a middle shaft 16, a shifting fork assembly and a swing rod bearing 5, all the components are matched with each other, the sliding connection state among the swing rod bearing 5, the shifting fork assembly and the middle shaft 16 is adjusted through the rotation of a function knob 13, and further the hammer gear working mode, the drill gear working mode and the hammer and drill gear working mode can be respectively realized by the light electric hammer, so that the light electric hammer is more flexible to use, the motor 46 is positioned in the shell 45, the output end of the motor 46 is provided with a motor shaft 49, one end of the motor shaft 49 is mutually connected with the function conversion mechanism, the function conversion mechanism comprises the function knob 13, the middle shaft 16, the swing rod bearing 5, a fourth gear 22, an upper clutch sleeve 3, a lower clutch sleeve 4 and the shifting fork assembly, and the function knob 13 is designed, the function is convenient to be converted from external rotation, the upper clutch sleeve 3 and the lower clutch sleeve 4 are sleeved at two ends of the intermediate shaft 16, a second gear 17 is arranged between the intermediate shaft 16 and the motor shaft 46, the second gear 17 is fixed on the intermediate shaft 16, one end of the intermediate shaft 16 is provided with a first bearing 8, the top of the first bearing 8 is fixed with an intermediate cover 2, the first bearing 8 and the intermediate cover 2 are fixed through a bearing pressing plate 7 and a screw 15, a swing rod bearing 5 is connected with the intermediate shaft 16, a shifting fork assembly is arranged between the function knob 13 and the intermediate shaft 16, the shifting fork assembly is composed of a positioning shifting fork 11, an upper shifting fork 12 and a lower shifting fork 14, the upper shifting fork 12 and the lower shifting fork 14 are sleeved on a guide post 18, a large pressure spring 20 is sleeved at one end of the guide post 18, the intermediate cover 2 is fixed at the top end of the guide post 18, one end of the function knob 13 is respectively linked with the upper clutch sleeve 3, the lower clutch sleeve 4 and the shifting fork assembly, an upper shifting fork 12 and a lower shifting fork 14 are respectively provided with an upper clutch sleeve 3 and a lower clutch sleeve 4, a spline is fixed on the surface of an intermediate shaft 16, spline grooves are respectively formed in the inner walls of the upper clutch sleeve 3 and the lower clutch sleeve 4, an inner sleeve 5-3 is sleeved outside a swing rod bearing 5, a double-raceway steel ball groove 5-6 is sleeved outside the inner sleeve 5-3, an inner ring steel ball 5-2 of the inner sleeve 5-3 is fixed in a retainer 5-4 and the double-raceway steel ball grooves to realize angle keeping of the swing rod bearing 5, the intermediate shaft 16 is further connected with a third gear 19, a gear box 48 is arranged outside the third gear 19, the gear box 48 is fixed at one end of a casing 45, a bearing chamber is arranged inside the gear box 48, the end part of the intermediate shaft 16 is connected with two or one second bearing 1, and the second bearing 1 is connected with the bearing chamber.

In this embodiment, preferably, the impact mechanism is composed of a swing rod bearing 5, a cylinder 47, an aluminum cylinder 26, a cylinder pin 25, an impact piston 27 and an impact rod 28, power is provided by the swing rod bearing 5 through the designed impact mechanism, power transmission is realized, one end of the impact piston 27 impacts the impact rod 28 due to reciprocating motion of the aluminum cylinder, the cylinder pin 25 is connected between the aluminum cylinder 26 and the swing rod bearing 5, an operation tool 50 is impacted when the end of the impact rod 28 reciprocates, an included angle between the swing rod bearing 5, the swing rod 5-1 and an inner sleeve 5-3 is 18-22 degrees, a large angle is adopted to increase stroke and impact power through the designed included angle between the swing rod bearing 5, the swing rod 5-1 and the inner sleeve 5-3 being 18-22 degrees, so that the working efficiency is improved, the second gear 17 is connected with a motor shaft 49 through meshing, one end of the first bearing 8 is connected with the bearing sleeve 6.

In this embodiment, preferably, the heat dissipation mechanism is composed of a heat sink 55, the heat sink 55 is fixed on the gear box 48, one end of the heat sink 55 is provided with an air inlet, the air inlet is an air outlet at the housing, and the other end of the heat sink 55 is provided with an air outlet, the shape of the heat sink 55 is matched with the shape of the gear box 48, through the designed heat sink 55, the gear box is externally provided with an aluminum-type heat sink 55, which is beneficial for heat dissipation, and has the function of externally connecting a heat sink 55, which is beneficial for reducing the temperature of the gear box 48, and the heat sink 55 is provided with an air outlet, and enters an air duct in the reduction gearbox through the air outlet on the housing 45, so as to accelerate the heat dissipation of the heat sink 55, the other end of the housing 45 is provided with a handle mechanism, the handle mechanism is composed of a D-shaped handle 42, a holding handle 35 and a shockproof positioning plate 37, one end of the holding handle 35 is rotatably connected with the D-shaped handle 42 through a pin shaft, the shockproof positioning plate 37 is fixed on the other end of the holding handle 35, one end of the D-shaped handle 42 is provided with a shockproof pressing plate 40, a shockproof spring 38 is connected between the shockproof pressing plate 40 and the shockproof positioning plate 37, a bolt 36 penetrates through the inner side of the shockproof spring 38, one end of the bolt 36 is fixed on the holding handle 35, the other end of the bolt 36 is connected with a nut 41, the nut 41 is arranged on the D-shaped handle 42, through the D type handle 42 and the handle 35 of holding of design, D type handle 42 has the intensity and the operating comfort degree of reinforcing electric hammer, through installation shockproof locating plate 37, bolt 36, shockproof spring 38, shockproof rubber sleeve 39, shockproof clamp plate 40, nut 41 between the two, make it utilize elasticity between the elastic vibration damping piece to absorb the vibration that produces because of the hammering subassembly in the operation, adopt this shockproof structure after, the vibrations volume on the handle 29 of holding reduces greatly, increase operator's comfort.

The working principle and the using process of the utility model are as follows: in the utility model, in operation, a motor 46 is arranged in a shell 45 of the electric hammer, the motor 46 provides electric energy for the operation of the electric hammer, the motor 46 rotates around a motor shaft 49, the electric energy is transmitted to an intermediate shaft 16 and then transmitted to a cylinder assembly to be output to a working tool of the electric hammer for various functional operations, the cylinder assembly drives a working tool working head along a working axis to selectively output and rotate around the cylinder axis or reciprocate around the cylinder axis, the intermediate shaft 16 drives the working tool working head along the working axis to selectively output and rotate around an intermediate shaft 16 line or reciprocate around an intermediate shaft 16 line, a function conversion structure is arranged in an intermediate cover 2, the intermediate shaft 16, a shifting fork assembly and a gear box 48 to achieve the functions required by the electric hammer, when the function knob 13 is in a first position, a clutch lower sleeve 4 is connected with inner sleeve key grooves 5-5 parts on a swing rod bearing 5, the clutch upper sleeve 3 is connected with the third gear 19, the cylinder outputs reciprocating motion and rotation, and the electric hammer is in a hammer and drilling gear working mode; when the function knob 13 rotates to the third position, the clutch lower sleeve 4 is separated from the middle part of the upper inner sleeve key groove 5-5 as shown in the figure, the clutch upper sleeve 3 is connected with the third gear 19, the cylinder only outputs rotation, and the electric hammer is in a gear drilling working mode.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a light-duty electric hammer, includes casing (45), motor (46), middle lid (2), heat dissipation mechanism, function conversion mechanism and impact mechanism, its characterized in that: the motor (46) is positioned inside the casing (45), a motor shaft (49) is arranged at the output end of the motor (46), one end of the motor shaft (49) is connected with a function switching mechanism, the impact mechanism is arranged on the middle cover (2), the function switching mechanism consists of a function knob (13), an intermediate shaft (16), a swing rod bearing (5), a fourth gear (22), a third gear, a clutch upper sleeve (3), a clutch lower sleeve (4) and a shifting fork assembly, the clutch upper sleeve (3) and the clutch lower sleeve (4) are both sleeved on two ends of the intermediate shaft (16), a second gear (17) is arranged between the intermediate shaft (16) and the motor shaft, the second gear (17) is fixed on the intermediate shaft (16), a first bearing (8) is arranged at one end of the intermediate shaft (16), and the first bearing (8) and the intermediate cover (2) are fixed through a bearing pressing plate (7) and a screw (15), the swing rod bearing (5) is connected with an intermediate shaft (16), a shifting fork assembly is arranged between the function knob (13) and the intermediate shaft (16) and consists of a positioning shifting fork (11), an upper shifting fork (12), a lower shifting fork (14) and a knob seat (23), the upper shifting fork (12) and the lower shifting fork (14) are both sleeved on a guide post (18), a large pressure spring (20) is sleeved outside one end of the guide post (18), a middle cover (2) is fixed at the top end of the guide post (18), the function knob (13) is fixed on the knob seat, the function knob (13) is respectively linked with the upper shifting fork (12) and the lower shifting fork (14) at a distance, the upper shifting fork (12) and the lower shifting fork (14) are respectively connected with an upper clutch sleeve (3) and a lower clutch sleeve (4), and splines are fixed on the surface of the intermediate shaft (16), spline grooves are formed in the inner walls of the upper clutch sleeve (3) and the lower clutch sleeve (4), an inner sleeve (5-3) is arranged outside the swing rod bearing (5), an inner sleeve key groove (5-5) is formed in the surface of the swing rod bearing (5), a double-roller-way steel ball groove (5-6) and a retainer (5-4) are sleeved outside the inner sleeve (5-3), and a swing rod (5-1) is arranged at one end of the inner sleeve (5-3).

2. A light weight electric hammer according to claim 1, wherein: the double-raceway steel ball groove structure is characterized in that steel balls (5-2) are arranged in the double-raceway steel ball groove (5-6), a third gear (19) is further connected onto the intermediate shaft (16), a gear box (48) is arranged outside the third gear (19), the gear box (48) is fixed to one end of the shell (45), a bearing chamber is arranged inside the gear box (48), two second bearings (1) are connected to the end portion of the intermediate shaft (16), and the second bearings (1) are connected with the bearing chamber.

3. A light weight electric hammer according to claim 1, wherein: the impact mechanism is composed of a cylinder (47), an aluminum cylinder (26), an impact rod (28), a cylinder pin (25) and an impact piston (27), the cylinder pin (25) is connected between the aluminum cylinder (26) and the swing rod bearing (5), and the impact rod (28) impacts a working tool (50) during working.

4. A light weight electric hammer according to claim 1, wherein: the included angle between the swing rod bearing (5), the swing rod (5-1) and the inner sleeve (5-3) is 18-22 degrees, the second gear (17) is connected with the motor shaft (49) in a meshed mode, and one end of the first bearing (8) is connected with the bearing sleeve (6).

5. A light weight electric hammer according to claim 1, wherein: the heat dissipation mechanism is composed of a heat sink (55), the heat sink (55) is fixed on the gear box (48), one end of the heat sink (55) is provided with an air inlet, the other end of the heat sink (55) is provided with an air outlet, and the appearance of the heat sink (55) is matched with that of the gear box (48).

6. A light weight electric hammer according to claim 1, wherein: the other end of casing (45) is provided with handle mechanism, handle mechanism comprises D type handle (42), gripping handle (35) and shockproof locating plate (37), rotate through the round pin axle between one end of gripping handle (35) and D type handle (42) and be connected, shockproof locating plate (37) are fixed on the other end of gripping handle (35), the one end of D type handle (42) is provided with shockproof clamp plate (40), be connected with shockproof spring (38) between shockproof clamp plate (40) and the shockproof locating plate (37), bolt (36) have been run through to the inboard of shockproof spring (38), the one end of bolt (36) is fixed on gripping handle (35), the other end of bolt (36) is connected with nut (41), nut (41) set up on D type handle (42).

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