CN217801535U

CN217801535U - Electric hammer

Info

Publication number: CN217801535U
Application number: CN202221725426.XU
Authority: CN
Inventors: 傅珂珂; 李进
Original assignee: Zhejiang Qianji Intelligent Technology Co Ltd
Current assignee: Zhejiang Qianji Intelligent Technology Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-11-15
Anticipated expiration: 2032-07-06
Also published as: WO2024008144A1

Abstract

The utility model relates to an electric hammer, electric hammer include the removal subassembly, strike subassembly and rotating assembly, remove the subassembly and include cylinder body, mobile unit and first power supply, strike the subassembly including dashing the hammer, rotating assembly is including rotating cover and second power supply. The impact hammer penetrates through the cylinder body and forms a sealed impact cavity, and when the first power source drives the cylinder body to reciprocate through the moving unit, air in the impact cavity is compressed, so that reciprocating impact motion of the impact hammer is realized. The second power source drives the rotating sleeve to drive the drill bit to rotate relative to the cylinder body, the impact assembly is arranged in the rotating sleeve, and the impact effect on the drill bit is achieved by the aid of the impact hammer. On one hand, the cylinder body and the impact hammer do not need to synchronously rotate, so that the separation of impact drive and rotation drive is realized, and the stability of impact motion and rotation motion drive is ensured; on the other hand, the first power source and the second power source respectively drive the drill bit to realize impact motion and rotation, so that the hammer-drill ratio of the electric hammer is convenient to adjust, and the use effect of the electric hammer is favorably improved.

Description

Electric hammer

Technical Field

The utility model relates to an electric tool technical field especially relates to electric hammer.

Background

The electric hammer is based on the principle that a transmission mechanism drives a drill bit to rotate and controls the drill bit to do reciprocating hammering movement. When a traditional electric hammer works, the motor drives the piston to compress air in the cylinder in a reciprocating manner through the transmission mechanism, and meanwhile, the drill bit is driven to rotate through the transmission structure. On one hand, the traditional electric hammer needs to drive the drill bit to rotate and the punch hammer to reciprocate, so that the transmission is unstable, and the use of the electric hammer is influenced; on the other hand, the traditional electric hammer is not convenient for adjusting the hammer-drill ratio of the electric hammer, and further the using effect is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an electric hammer capable of improving transmission stability and facilitating adjustment of a hammer-drill ratio, in view of the above-described problems.

An electric hammer comprises a moving assembly, an impact assembly and a rotating assembly, wherein the moving assembly comprises a cylinder, a moving unit and a first power source, the moving unit is connected to the cylinder, and the first power source is used for driving the cylinder to reciprocate through the moving unit; the impact assembly comprises a punch hammer, the punch hammer penetrates through the cylinder body and is in sealing contact with the inner wall of the cylinder body, so that a sealed impact cavity is formed between the punch hammer and the inner wall of the cylinder body, and the punch hammer can reciprocate in the cylinder body; the rotary assembly comprises a rotary sleeve and a second power source, the cylinder body is arranged in the rotary sleeve in a penetrating mode, the impact assembly is arranged in the rotary sleeve, and the second power source is used for driving the rotary sleeve to rotate relative to the cylinder body.

In one embodiment, the first power source is arranged in the direction of the rotation axis of the rotating sleeve and is positioned on one side of the cylinder body, which is opposite to the rotating sleeve; the second power source is arranged on one side of the outer wall of the rotating sleeve.

In one embodiment, the rotating assembly further comprises a transmission unit, the transmission unit is connected with the outer wall of the rotating sleeve, and the second power source is used for driving the rotating sleeve to rotate through the transmission unit.

In one embodiment, the transmission unit includes a first bevel gear and a second bevel gear, the first bevel gear is sleeved on an outer wall of the rotating sleeve, the second bevel gear is engaged with the first bevel gear, and the second power source is used for rotating the second bevel gear.

In one embodiment, the cylinder body comprises an impact cylinder part and a moving cylinder part connected with the impact cylinder part, and the moving unit is connected with the moving cylinder part; the impact hammer is arranged in the impact cylinder part in a penetrating manner, and the impact cylinder part is arranged in the rotating sleeve in a penetrating manner; wherein the moving cylinder portion is located outside the rotating sleeve, and the moving unit is connected to the moving cylinder portion.

In one embodiment, the moving unit comprises a reciprocating shaft and a moving body, a reciprocating guide rail is arranged on the reciprocating shaft, the reciprocating guide rail is a closed curve-shaped guide rail surrounding the axis of the reciprocating shaft, and peaks and troughs of the curve-shaped guide rail are arranged at intervals along the axis of the reciprocating shaft; the moving body is limited on the cylinder body and can move on the reciprocating guide rail; the first power source is used for driving the reciprocating shaft to rotate so that the moving body drives the cylinder body to reciprocate along the axis direction of the reciprocating shaft.

In one embodiment, the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curve-shaped groove surrounding the axis of the reciprocating shaft, and the moving body is arranged in the reciprocating groove in a penetrating mode and can move in the reciprocating groove; the reciprocating shaft is arranged in the containing cavity in a penetrating mode, a limiting groove is formed in the inner wall of the containing cavity, and the moving body is limited between the inner wall of the limiting groove and the inner wall of the reciprocating groove.

In one embodiment, the reciprocating shaft is further provided with a balance guide rail which is arranged opposite to the reciprocating guide rail along the axial line of the reciprocating shaft at intervals, the balance guide rail is a closed curve-shaped guide rail surrounding the axial line of the reciprocating shaft, and wave crests and wave troughs of the balance guide rail are arranged along the axial line of the reciprocating shaft at intervals; the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axis direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axis direction; the balance guide rail is provided with a balance body, the balance body and the moving body are arranged oppositely along the axis of the reciprocating shaft, and when the reciprocating shaft rotates, the balance body and the moving body move in the opposite direction or in the opposite direction.

In one embodiment, the moving assembly further comprises a guide rod, the guide rod is located outside the rotating sleeve, a matching structure is formed on the outer wall of the cylinder body, the guide rod is in guiding matching with the matching structure, and the length direction of the guide rod is the axial direction of the reciprocating shaft.

In one embodiment, the first power source and the second power source are both motors.

Above-mentioned electric hammer, the ram wear to locate in the cylinder body to form sealed impact chamber, and then when first power supply passed through mobile unit drive cylinder body reciprocating motion, the cylinder body removed for the ram, with the air of compression impact intracavity, and then utilize compressed air to strike the ram, realize the reciprocating motion of ram. Meanwhile, the drill bit is arranged on the rotating sleeve, the second power source drives the rotating sleeve to drive the drill bit to rotate relative to the cylinder body, the impact assembly is arranged in the rotating sleeve, and then the impact effect on the drill bit is achieved by utilizing the impact hammer, so that the drill bit is in reciprocating impact motion in the rotating motion process. The electric hammer realizes that the impact motion of the drill bit is realized through the matching of the first power source, the moving unit and the cylinder body, and realizes that the rotation of the drill bit is realized through the second power source and the rotating sleeve, on one hand, the cylinder body and the impact hammer do not need to rotate synchronously, the separation of impact drive and rotation drive is realized, and the stability of the impact motion and the rotation motion drive of the drill bit is ensured; on the other hand, the first power source and the second power source respectively drive the drill bit to realize impact motion and rotation, so that the impact speed and the rotation speed can be conveniently adjusted respectively, the hammer-drill ratio of the electric hammer can be conveniently adjusted, and the use effect of the electric hammer can be favorably improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Furthermore, the drawings are not to scale of 1. In the drawings:

FIG. 1 is a schematic diagram of an embodiment of an electric hammer;

FIG. 2 is a cross-sectional view of the electric hammer shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the rotating sleeve in FIG. 2;

FIG. 4 is a partially exploded view of the moving assembly of FIG. 2 with a first power source omitted;

FIG. 5 is a schematic view of the cylinder block of FIG. 4;

fig. 6 is a sectional view of the cylinder shown in fig. 5.

Description of reference numerals:

10. an electric hammer; 100. a moving assembly; 110. a cylinder body; 111. an impingement cavity; 112. a mating structure; 113. an impact cylinder section; 114. a moving cylinder section; 115. an accommodating cavity; 116. a limiting groove; 117. a first splice; 1172. a first splice cavity; 1174. a first splice groove; 118. a second splice; 1182. a second splice cavity; 1184. a second splice groove; 120. a mobile unit; 121. a reciprocating shaft; 122. a moving body; 130. a first power source; 140. a rolling stopper; 150. a guide bar; 200. an impact assembly; 210. punching a hammer; 220. an impact bar; 300. a rotating assembly; 310. rotating the sleeve; 312. an air inlet; 314. an exhaust hole; 320. a second power source; 330. a transmission unit; 332. a first bevel gear; 334. a second bevel gear.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2, the electric hammer 10 of an embodiment of the present invention can at least ensure the stability of the transmission, and is convenient for adjusting the hammer-drill ratio, thereby improving the use effect. Specifically, the electric hammer 10 includes a moving assembly 100, an impact assembly 200 and a rotating assembly 300, the moving assembly 100 includes a cylinder 110, a moving unit 120 and a first power source 130, the moving unit 120 is connected to the cylinder 110, and the first power source 130 is used for driving the cylinder 110 to reciprocate through the moving unit 120; the impact assembly 200 comprises a hammer 210, the hammer 210 is arranged in the cylinder 110 in a penetrating way and is in sealing contact with the inner wall of the cylinder 110, so that a sealed impact cavity 111 is formed between the hammer 210 and the inner wall of the cylinder 110, and the hammer 210 can reciprocate in the cylinder 110; the rotating assembly 300 includes a rotating sleeve 310 and a second power source 320, the cylinder body 110 is disposed through the rotating sleeve 310, the impact assembly 200 is disposed in the rotating sleeve 310, and the second power source 320 is used for driving the rotating sleeve 310 to rotate relative to the cylinder body 110.

In the electric hammer 10, the hammer 210 penetrates through the cylinder 110 and forms the sealed impact cavity 111, and further when the first power source 130 drives the cylinder 110 to reciprocate through the moving unit 120, the cylinder 110 moves relative to the hammer 210 to compress the air in the impact cavity 111, and then the hammer 210 is impacted by the compressed air, so as to achieve the reciprocating impact motion of the hammer 210. Meanwhile, the drill bit is arranged on the rotating sleeve 310, the second power source 320 drives the rotating sleeve 310 to drive the drill bit to rotate relative to the cylinder body 110, the impact assembly 200 is arranged in the rotating sleeve 310, and then the impact effect on the drill bit is realized by the aid of the impact hammer 210, so that the drill bit can do reciprocating impact motion in the rotating motion process. The electric hammer 10 realizes that the impact motion of the drill bit is realized through the cooperation of the first power source 130, the moving unit 120 and the cylinder body 110, and realizes that the rotation of the drill bit is realized through the second power source 320 and the rotating sleeve 310, on one hand, the cylinder body 110 and the impact hammer 210 do not need to synchronously rotate, the separation of impact drive and rotation drive is realized, and the stability of the impact motion and the rotation motion drive of the drill bit is ensured; on the other hand, the first power source 130 and the second power source 320 respectively drive the drill bit to perform the impact motion and the rotation, so as to respectively adjust the impact speed and the rotation speed, and to adjust the hammer-to-drill ratio of the electric hammer 10, which is beneficial to improving the use effect of the electric hammer 10.

In one embodiment, the first power source 130 is disposed in the direction of the rotation axis of the rotating sleeve 310 and on the side of the cylinder 110 opposite to the rotating sleeve 310; the second power source 320 is disposed at one side of the outer wall of the rotating sleeve 310. By arranging the first power source 130 on the axis of the rotary sleeve 310 and the second power source 320 on one side of the outer wall of the rotary sleeve 310, it is not only convenient for the first power source 130 and the second power source 320 to drive the moving unit 120 and the rotary sleeve 310, respectively, but also convenient for achieving miniaturization of the electric hammer 10.

In this embodiment, the first power source 130 is a motor. The second power source 320 is an electric motor.

In one embodiment, the rotating assembly 300 further includes a transmission unit 330, the transmission unit 330 is connected to an outer wall of the rotating sleeve 310, and the second power source 320 is configured to drive the rotating sleeve 310 to rotate through the transmission unit 330. The driving unit 330 is provided to facilitate the driving connection of the second power source 320 and the rotating sleeve 310.

Referring to fig. 3, in particular, the transmission unit 330 includes a first bevel gear 332 and a second bevel gear 334, the first bevel gear 332 is disposed on the outer wall of the rotating sleeve 310, the second bevel gear 334 is engaged with the first bevel gear 332, and the second power source 320 is used for rotating the second bevel gear 334. Since the second power source 320 is disposed at one side of the outer wall of the rotary sleeve 310, the rotational connection of the second power source 320 to the rotary sleeve 310 is facilitated by providing the first bevel gear 332 and the second bevel gear 334.

In another embodiment, the transmission unit 330 may further include two gears engaged with each other, one of the gears is sleeved on the outer wall of the rotating sleeve 310, and the other gear is connected to the second power source 320.

Alternatively, in other embodiments, the transmission unit 330 may also have other transmission structures, as long as it is convenient to realize the transmission connection between the rotating sleeve 310 and the second power source 320, and the purpose that the second power source 320 can drive the rotating sleeve 310 to rotate is realized.

Referring to fig. 2 and 4, in an embodiment, the cylinder block 110 includes an impact cylinder portion 113 and a moving cylinder portion 114 connected to the impact cylinder portion 113, and the moving unit 120 is connected to the moving cylinder portion 114; the impact hammer 210 is arranged in the impact cylinder part 113 in a penetrating way, and the impact cylinder part 113 is arranged in the rotating sleeve 310 in a penetrating way; the moving cylinder 114 is located outside the rotating sleeve 310, and the moving unit 120 is connected to the moving cylinder 114. By disposing the moving cylinder 114 and the moving unit 120 outside the rotating sleeve 310, the moving unit 120 can drive the moving cylinder 114 to reciprocate stably, and the stability of the rotating sleeve 310 for driving the drill bit to rotate can be prevented from being affected.

Referring to fig. 5 and 6, in particular, a sealed impact cavity 111 is formed between the hammer 210 and the inner wall of the impact cylinder portion 113, and the connection position of the impact cylinder portion 113 and the moving cylinder portion 114 is partitioned and connected by a partition plate, so as to form the sealed impact cavity 111. Further, the impact cylinder 113 is opened on the side opposite to the moving cylinder 114, and the hammer 210 can be inserted into the impact cylinder 113 through the opening of the impact cylinder 113.

In this embodiment, the diameter of the outer wall of the impingement cylinder 113 corresponds to the diameter of the inner wall of the corresponding rotating sleeve 310. Since the impact cylinder portion 113 can reciprocate within the rotating sleeve 310, by setting the diameter of the outer wall of the impact cylinder portion 113 to be uniform with the diameter of the inner wall of the rotating sleeve 310, the stability of the direction in which the impact cylinder portion 113 moves can be further ensured.

Referring to fig. 3 again, in an embodiment, an air inlet 312 and an air outlet 314 are formed on an outer wall of the rotating sleeve 310, the air inlet 312 and the air outlet 314 are arranged at intervals along an axis of the rotating sleeve 310, when the impact cylinder 113 moves to a maximum stroke in the rotating sleeve 310 in a reciprocating manner, the air inlet 312 is covered, when the impact cylinder 113 moves to a minimum stroke, the air inlet 312 is not covered by the impact hammer 210, and the air outlet 314 is not covered by the impact cylinder 113 in the reciprocating manner. The stable movement of the hammer 210 in the rotating sleeve 310 is realized through the air inlet hole 312 and the air outlet hole 314, and the impact motion of the hammer 210 is prevented from being influenced by air pressure.

Referring to fig. 2 and 4, in an embodiment, the moving unit 120 includes a reciprocating shaft 121 and a moving body 122, the reciprocating shaft 121 is provided with a reciprocating guide rail, the reciprocating guide rail is a closed curve-shaped guide rail surrounding an axis of the reciprocating shaft 121, and peaks and valleys of the curve-shaped guide rail are spaced along the axis of the reciprocating shaft 121; the moving body 122 is limited on the cylinder body 110 and can move on the reciprocating guide rail; the first power source 130 is used for driving the reciprocating shaft 121 to rotate, so that the moving body 122 drives the cylinder body 110 to reciprocate along the axial direction of the reciprocating shaft 121.

In the present embodiment, the first power source 130 drives the reciprocating shaft 121 to rotate. When the reciprocating shaft 121 rotates, the moving body 122 can move on the reciprocating guide rail, so that the moving body 122 can move between the wave crest and the wave trough of the curved guide rail, the purpose that the moving body 122 reciprocates along the axis direction of the reciprocating shaft 121 is achieved, and the purpose that the cylinder body 110 reciprocates along the axis direction of the reciprocating shaft 121 is further achieved.

In this embodiment, the reciprocating guide rail is a reciprocating groove 123, the reciprocating groove 123 is a closed curve-shaped groove surrounding the axis of the reciprocating shaft 121, and the wave crests and the wave troughs of the curve-shaped groove are arranged at intervals along the axis of the reciprocating shaft 121; the moving body 122 is inserted into the reciprocating groove 123 and is movable in the reciprocating groove 123.

In this embodiment, the moving body 122 is a sphere, and the sphere can roll in the reciprocating groove 123.

Compared with the reciprocating movement of the cylinder body 110 realized by a crank structure or an eccentric driving structure, the reciprocating movement of the cylinder body 110 is realized by the crank structure and the eccentric driving structure through swinging, and further, a deflection angle exists, and the problem of friction work by a deflection force exists, so that the work stability is poor. The rotary motion of the reciprocating shaft 121 of the moving unit 120 of the present application is converted into the linear motion of the cylinder body 110, so that the deflection intersection does not occur, the work stability is better, and the miniaturization design is facilitated.

In another embodiment, the reciprocating guide rail is a guide protrusion, the guide protrusion is a closed strip-shaped curved protrusion surrounding the axis of the reciprocating shaft 121, and the wave crests and the wave troughs of the curved protrusion are arranged at intervals along the axis of the reciprocating shaft 121; the moving body 122 is provided on the guide protrusion and can move on the guide protrusion in a length direction.

In one embodiment, there are at least two reciprocating guide rails, each reciprocating guide rail is disposed along the axis of the reciprocating shaft 121 at intervals, and each reciprocating guide rail is provided with at least one moving body 122. By providing at least two reciprocating guide rails, the stability of the moving body 122 driving the cylinder 110 to move can be improved.

In one embodiment, there may be two moving bodies 122 disposed on each reciprocating guide rail, the two moving bodies 122 are disposed at regular intervals around the axis of the reciprocating shaft 121, and the two moving bodies 122 can move synchronously during reciprocating movement. The two moving bodies 122 move synchronously to drive the cylinder body 110 to move, so that the moving stability of the cylinder body 110 can be further improved, and the stress stability of the cylinder body 110 is ensured. In other embodiments, there may be one moving body 122. Alternatively, the number of the moving bodies 122 may be other than the number of the moving bodies 122, and each of the moving bodies 122 may move in synchronization with each other in the same direction.

In another embodiment, the reciprocating shaft 121 is further provided with a balance guide rail which is arranged opposite to the reciprocating guide rail along the axis of the reciprocating shaft 121 at intervals, the balance guide rail is a closed curve-shaped guide rail surrounding the axis of the reciprocating shaft 121, and peaks and valleys of the balance guide rail are arranged along the axis of the reciprocating shaft 121 at intervals; and the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axis direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axis direction. The balance guide rail is provided with a balance body, the balance body and the moving body 122 are arranged oppositely along the axis of the reciprocating shaft 121, and then when the reciprocating shaft 121 rotates, the balance body and the moving body 122 move towards or away from each other. By arranging the balance guide rail and the balance body, the bidirectional acceleration of the balance body and the moving body 122 can be counteracted in the moving process, and the vibration generated by the acceleration is reduced.

Specifically, the balance guide rail and the reciprocating guide rail are consistent in structure, and the balance guide rail is symmetrically arranged along the circumference of the power shaft relative to the reciprocating guide rail. In the present embodiment, the balance body is structurally identical to the moving body 122.

Referring to fig. 4, 5 and 6, in an embodiment, an accommodating cavity 115 is formed in the moving cylinder portion 114 of the cylinder body 110, the reciprocating shaft 121 is inserted into the accommodating cavity 115, a limiting groove 116 is formed on an inner wall of the accommodating cavity 115, and the moving body 122 is limited between an inner wall of the limiting groove 116 and an inner wall of the reciprocating groove 123. Specifically, the moving body 122 is partially disposed in the stopper groove 116, and the remaining portion is disposed in the reciprocating groove 123. Through wearing to locate reciprocating shaft 121 in the holding chamber 115 for reciprocating shaft 121's rotation takes place in holding chamber 115, and the moving body 122 is spacing between reciprocating groove 123 and spacing groove 116, guarantees the spacing stability of moving body 122, guarantees the stability that moving body 122 drove the cylinder body 110 and removes.

In the present embodiment, the accommodating cavity 115 penetrates through a side of the moving cylinder 114 opposite to the impact cylinder 113, so that the reciprocating shaft 121 can be inserted into the accommodating cavity 115 from the side of the moving cylinder 114 opposite to the impact cylinder 113.

In one embodiment, the moving assembly 100 further includes a rolling position-limiting element 140, the rolling position-limiting element 140 is disposed in the position-limiting groove 116, the moving body 122 is a sphere, and the sphere is rollably disposed between the rolling position-limiting element 140 and the inner wall of the reciprocating groove 123. The rolling stopper 140 prevents the moving body 122 from directly rolling and rubbing against the inner wall of the stopper groove 116. Specifically, a hemispherical recess is formed in the rolling position limiting member 140, and the moving body 122 is disposed in the hemispherical recess and can roll.

In one embodiment, the moving cylinder portion 114 of the cylinder body 110 includes a first splicing portion 117 and a second splicing portion 118, the first splicing portion 117 is connected to the impact cylinder portion 113, a first splicing cavity 1172 is formed in the first splicing portion 117, a first splicing groove 1174 is formed on an inner wall of the first splicing cavity 1172, and a side of the first splicing portion 118, which is opposite to the impact cylinder portion 113, is open, a second splicing cavity 1182 is formed in the second splicing portion 118, a second splicing groove 1184 is formed on an inner wall of the second splicing cavity 1182, and a side of the second splicing portion 118 is open; the open side of the second splicing portion 118 is butted with the open side of the first splicing portion 117, so that the first splicing cavity 1172 and the second splicing cavity 1182 are correspondingly communicated to form the accommodating cavity 115, and the first splicing groove 1174 and the second splicing groove 1184 are correspondingly communicated to form the limiting groove 116. Because the moving body 122 is limited in the limiting groove 116, and the reciprocating shaft 121 penetrates through the accommodating cavity 115, the moving body 122 can be conveniently installed in the limiting groove 116 through the first splicing part 117 and the second splicing part 118, and effective limiting of the moving body 122 in the limiting groove 116 is ensured.

In this embodiment, the first splicing portion 117 is integrally formed on the impact cylinder portion 113.

In one embodiment, the first splice 117 is welded to the second splice 118. In other embodiments, the first splicing portion 117 and the second splicing portion 118 can also be connected by screws or clipped together.

Referring to fig. 1 and 4, in one embodiment, the moving assembly 100 further includes a guide rod 150, the guide rod 150 is located outside the rotating sleeve 310, the matching structure 112 is formed on the outer wall of the cylinder 110, the guide rod 150 is in guiding fit with the matching structure 112, and the length direction of the guide rod 150 is the axial direction of the reciprocating shaft 121. By providing a guiding engagement of the guide rod 150 with the engagement structure 112, the stability of the reciprocating movement of the cylinder block 110 is further ensured. Specifically, the fitting structure 112 is a sleeve-shaped structure, and the guide rod 150 is inserted into the sleeve-shaped fitting structure 112.

In the present embodiment, the fitting structure 112 is formed on the outer wall of the moving cylinder portion 114.

In one embodiment, the number of the guide rods 150 is at least two, the guide rods 150 are spaced around the axis of the reciprocating shaft 121, and each guide rod 150 is connected to the cylinder 110 through a fitting structure 112. By providing at least two guide rods 150, the stability of the movement of the cylinder block 110 can be further improved. Specifically, the respective guide rods 150 are uniformly arranged around the cylinder block 110. In the present embodiment, the number of the guide bars 150 is two. In other embodiments, the number of the guide rods 150 may be three, four, or other numbers.

In one embodiment, for a single mating structure 112, one portion is formed on the outer wall of the first splice 117 and another portion is formed on the outer wall of the second splice 118. The first splice 117 and the second splice 118 are spliced together to form the mating structure 112. Because the guide rod 150 is in guiding fit with the fitting structure 112, the guide rod 150 can be in guiding fit with both the first splicing portion 117 and the second splicing portion 118 by forming part of the fitting structure 112 at both the first splicing portion 117 and the second splicing portion 118.

In other embodiments, the mating structure 112 may be formed separately on the first splice 117 or separately on the second splice 118.

Referring again to fig. 2, in one embodiment, the impact assembly 200 further includes an impact rod 220, and the impact rod 220 is located on a side of the hammer 210 facing away from the cylinder 110. The hammer 210 can strike the drill bit in the rotating sleeve 310 through the striking rod 220.

In one embodiment, the electric hammer 1010 further includes a protective casing (not shown), and the movable assembly 100 and the rotary assembly 300 are disposed in the protective casing, so that the movable assembly 100 and the rotary assembly 300 are protected by the protective casing. Specifically, a lubricating oil cavity is formed in the protective shell, and the transmission unit 330 and the moving unit 120 are located in the lubricating oil cavity. By adding lubricating oil into the lubricating oil cavity, the stability of the transmission unit 330 and the moving unit 120 can be ensured, the service life of each component can be prolonged, and the reciprocating speed and the rotating speed can be increased, so that the impact power of the electric hammer 10 can be improved.

In the operation of the conventional electric hammer, the rotation speed of the motor will decrease with the increase of the drilling depth load of the drill bit, which results in the decrease of the hammering speed, and the electric hammer 10 can avoid that the hammering speed can be maintained even if the rotation speed decreases by the first power source 130 and the second power source 320, thereby improving the use effect of the electric hammer 10.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. An electric hammer, characterized in that it comprises:

the moving assembly comprises a cylinder body, a moving unit and a first power source, the moving unit is connected to the cylinder body, and the first power source is used for driving the cylinder body to reciprocate through the moving unit;

the impact assembly comprises a punch hammer, the punch hammer penetrates through the cylinder body and is in sealing contact with the inner wall of the cylinder body, so that a sealed impact cavity is formed between the punch hammer and the inner wall of the cylinder body, and the punch hammer can reciprocate in the cylinder body; and

the rotary component comprises a rotary sleeve and a second power source, the cylinder body is arranged in the rotary sleeve in a penetrating mode, the impact component is arranged in the rotary sleeve, and the second power source is used for driving the rotary sleeve to rotate relative to the cylinder body.

2. The electric hammer according to claim 1, wherein the first power source is disposed in a direction of an axis of rotation of the rotary sleeve on a side of the cylinder body facing away from the rotary sleeve; the second power source is arranged on one side of the outer wall of the rotating sleeve.

3. The electric hammer of claim 2, wherein the rotating assembly further comprises a transmission unit connected to an outer wall of the rotating sleeve, and the second power source is configured to drive the rotating sleeve to rotate via the transmission unit.

4. The electric hammer according to claim 3, wherein the transmission unit comprises a first bevel gear and a second bevel gear, the first bevel gear is sleeved on the outer wall of the rotating sleeve, the second bevel gear is engaged with the first bevel gear, and the second power source is used for rotating the second bevel gear.

5. The electric hammer according to claim 2, wherein the cylinder body includes an impact cylinder portion and a moving cylinder portion connected to the impact cylinder portion, the moving unit being connected to the moving cylinder portion; the impact hammer is arranged in the impact cylinder part in a penetrating manner, and the impact cylinder part is arranged in the rotating sleeve in a penetrating manner; wherein the moving cylinder portion is located outside the rotating sleeve.

6. The electric hammer according to claim 5, wherein the moving unit comprises a reciprocating shaft and a moving body, a reciprocating guide rail is arranged on the reciprocating shaft, the reciprocating guide rail is a closed curve-shaped guide rail surrounding the axis of the reciprocating shaft, and peaks and valleys of the curve-shaped guide rail are arranged at intervals along the axis of the reciprocating shaft; the moving body is limited on the cylinder body and can move on the reciprocating guide rail; the first power source is used for driving the reciprocating shaft to rotate, so that the moving body drives the cylinder body to reciprocate along the axis direction of the reciprocating shaft.

7. The electric hammer according to claim 6, wherein the reciprocating guide rail is a reciprocating groove which is a closed curve-shaped groove surrounding the axis of the reciprocating shaft, and the moving body is inserted into the reciprocating groove and can move in the reciprocating groove; the reciprocating shaft is arranged in the containing cavity in a penetrating mode, a limiting groove is formed in the inner wall of the containing cavity, and the moving body is limited between the inner wall of the limiting groove and the inner wall of the reciprocating groove.

8. The electric hammer according to claim 6 or 7, wherein the reciprocating shaft is further provided with a balance guide rail which is arranged opposite to the reciprocating guide rail at intervals along the axis of the reciprocating shaft, the balance guide rail is a closed curve-shaped guide rail surrounding the axis of the reciprocating shaft, and peaks and troughs of the balance guide rail are arranged at intervals along the axis of the reciprocating shaft; the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axis direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axis direction; the balance guide rail is provided with a balance body, the balance body and the moving body are arranged oppositely along the axis of the reciprocating shaft, and when the reciprocating shaft rotates, the balance body and the moving body move in the opposite direction or in the opposite direction.

9. The electric hammer according to claim 6, wherein the moving assembly further comprises a guide rod, the guide rod is located outside the rotating sleeve, a matching structure is formed on the outer wall of the cylinder body, the guide rod is in guiding matching with the matching structure, and the length direction of the guide rod is the axial direction of the reciprocating shaft.

10. An electric hammer according to any one of claims 1 to 7 and 9, wherein the first and second power sources are both motors.