WO2024008135A1

WO2024008135A1 - Rotary hammer

Info

Publication number: WO2024008135A1
Application number: PCT/CN2023/106012
Authority: WO
Inventors: 傅珂珂; 李进
Original assignee: 浙江千机智能科技有限公司
Priority date: 2022-07-06
Filing date: 2023-07-06
Publication date: 2024-01-11
Also published as: CN115122282A

Abstract

The present invention relates to an rotary hammer. The electric hammer comprises a moving assembly, an impact assembly, and a rotating assembly; the moving assembly comprises a cylinder body and a movement unit; the impact assembly comprises an impact hammer; and the rotating assembly comprises a rotating sleeve, a transmission unit and a driving source. The impact hammer passes within the cylinder body and forms a sealed impact cavity; when the movement unit drives the cylinder body to reciprocate, the cylinder body moves relative to the impact hammer, so as to compress air in the impact cavity; the impact hammer is impacted by the compressed air, and a reciprocating impact motion of the impact hammer is implemented. Meanwhile, a drill bit is arranged on the rotating sleeve, the driving source drives the rotating sleeve to drive the drill bit to rotate relative to the cylinder body by means of the transmission unit, the impact assembly is arranged in the rotating sleeve, and the impact hammer is further used to implement an impact effect on the drill bit. Rotation of the drill bit is implemented by means of the transmission unit and the rotating sleeve, and impact movement of the drill bit is implemented by means of cooperation between the cylinder body and the punch hammer, so that the separation of impact driving and rotational driving is achieved, and ensuring the stability of driving the impact movement and rotational movement of the drill bit.

Description

Electric hammer

Technical field

The present invention relates to the technical field of electric tools, in particular to electric hammers.

Background technique

The principle of the electric hammer is that while the transmission mechanism drives the drill bit to perform rotational motion, it also controls the drill bit to perform reciprocating hammering motion. A traditional electric hammer uses a transmission mechanism to drive a piston to reciprocate in a cylinder to compress air. Periodic changes in the air pressure in the cylinder drive the hammer in the cylinder to reciprocate, and the cylinder is used to drive the drill bit to rotate. However, the traditional electric hammer needs to drive both the drill bit to rotate and the hammer to reciprocate, resulting in unstable transmission and affecting the use of the electric hammer.

Contents of the invention

Based on this, it is necessary to provide an electric hammer with more stable transmission to address the above problems.

An electric hammer. The electric hammer includes a moving component, an impact component, and a rotating component. The moving component includes a cylinder and a moving unit. The moving unit is connected to the cylinder and is used to drive the cylinder to move back and forth. ; The impact assembly includes a ram, which is disposed in the cylinder and is in sealing contact with the inner wall of the cylinder, so that a sealed impact cavity is formed between the ram and the inner wall of the cylinder. , the ram is movable in the cylinder; the rotating component includes a rotating sleeve, a transmission unit and a driving source, the cylinder is passed through the rotating sleeve, and the impact component is provided In the rotating sleeve, the transmission unit is drivingly connected to the rotating sleeve, and the driving source is used to drive the rotating sleeve to rotate relative to the cylinder through the transmission unit.

In one embodiment, the transmission unit includes a transmission rod and a first transmission member, and the transmission unit One end of the rod is drivingly connected to the rotating sleeve through the first transmission member, and the driving source is used to drive the other end of the transmission rod to rotate.

In one embodiment, the length direction of the transmission rod is the reciprocating movement direction of the cylinder, and a guide structure is formed on the outer wall of the cylinder, and the guide structure cooperates with the guide structure of the transmission rod.

In one of the embodiments, the cylinder includes an impact cylinder part and a moving cylinder part connected to the impact cylinder part, the moving unit is connected to the moving cylinder part; the ram is inserted through the In the impact cylinder part, the impact cylinder part is inserted into the rotating sleeve; the moving cylinder part and the transmission rod are both located outside the rotating sleeve, and the guide structure is formed on the outer wall of the moving cylinder part superior.

In one embodiment, the diameter of the outer wall of the impact cylinder is consistent with the diameter of the corresponding inner wall of the rotating sleeve.

In one embodiment, the number of the transmission rods is at least two, each of the transmission rods is spaced around the rotation axis of the rotating sleeve, and each transmission rod is connected to the first transmission member through a first transmission member. The rotating sleeve is drivingly connected; the outer wall of the cylinder is formed with the guide structures consistent with the number of the transmission rods, and each of the transmission rods is correspondingly guided and matched with one of the guide structures.

In one embodiment, the driving source and the rotating sleeve are respectively located on one side of the opposite ends of the cylinder. The transmission unit also includes a second transmission member, and the other ends of each transmission rod are driven. Connected to the second transmission member, the driving source is used to drive each of the transmission rods to rotate synchronously through the second transmission member.

In one embodiment, the moving unit includes a reciprocating shaft and a moving body. The reciprocating shaft is provided with a reciprocating guide rail. The reciprocating guide rail is a closed curved guide rail surrounding the axis of the reciprocating shaft, and the curved guide rail is The wave peaks and wave troughs of the guide rail are spaced along the axis of the reciprocating shaft; the moving body is limited to the cylinder and can move on the reciprocating guide rail;

Wherein, the driving source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder The body moves back and forth along the axis direction of the reciprocating shaft; or the moving assembly further includes a power source, and the power source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder along the reciprocating direction. The axis of the shaft moves back and forth.

In one embodiment, the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curved groove surrounding the axis of the reciprocating shaft, and the moving body is penetrated in the reciprocating groove and can move in the reciprocating groove. Move in the groove; an accommodation cavity is formed in the moving cylinder part of the cylinder body, the reciprocating shaft is passed through the accommodation cavity, and a limited groove is formed on the inner wall of the accommodation cavity, and the moving body The limit is between the inner wall of the limiting groove and the inner wall of the reciprocating groove.

In one embodiment, the reciprocating shaft is also provided with a balance guide rail that is spaced opposite to the reciprocating guide rail along the axis of the reciprocating shaft, and the balance guide rail is a closed curved guide rail surrounding the axis of the reciprocating shaft, And the wave crests and wave troughs of the balance guide rail are spaced apart along the axis of the reciprocating shaft; and the wave crests of the balance guide rail are opposite to the wave troughs of the reciprocating guide rail along the axial direction, and the wave troughs of the balance guide rail are opposite to the wave troughs of the balance guide rail along the axial direction. The wave crests of the reciprocating guide rail are opposite to each other; a balance body is provided on the balance guide rail, and the balance body and the moving body are arranged oppositely along the axis of the reciprocating shaft. When the reciprocating shaft rotates, the balance body and the moving body are arranged oppositely. Moving bodies move toward or away from each other.

In one embodiment, the electric hammer further includes a protective shell, a lubricating oil chamber is formed in the protective shell, and the transmission unit and the moving component are located in the lubricating oil chamber.

In the above-mentioned electric hammer, the ram penetrates the cylinder and forms a sealed impact chamber. When the moving unit of the moving assembly drives the cylinder to reciprocate, the cylinder moves relative to the ram to compress the air in the impact chamber. Compressed air is then used to impact the punch to achieve reciprocating impact motion of the punch. At the same time, the drill bit is set on the rotating sleeve, and the driving source drives the rotating sleeve relative to the cylinder through the transmission unit to drive the drill bit, and the impact component is set in the rotating sleeve, and then uses the hammer to impact the drill bit, thereby achieving the rotation of the drill bit. Reciprocating impact motion is achieved during the movement. The above-mentioned electric hammer realizes drill bit rotation only through the transmission unit and The rotating sleeve realizes the impact movement of the drill bit only by matching the cylinder with the ram. The cylinder and the ram do not need to rotate synchronously to achieve the separation of impact drive and rotation drive to ensure the stability of the impact movement and rotation drive of the drill bit.

Description of the drawings

The drawings forming a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

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 introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements in the drawings are drawn by way of example only and not necessarily to true scale. In the attached picture:

Figure 1 is a schematic structural diagram of an electric hammer in an embodiment;

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

Figure 3 is a schematic structural diagram of the rotating sleeve in Figure 2;

Figure 4 is a partially exploded view of the moving assembly and transmission rod in Figure 2;

Figure 5 is a schematic structural diagram of the cylinder in Figure 4;

FIG. 6 is a cross-sectional view of the cylinder shown in FIG. 5 .

Explanation of reference symbols:

10. Electric hammer; 100. Moving component; 110. Cylinder; 111. Impact chamber; 112. Guide structure; 113. Impact cylinder part; 114. Mobile cylinder part; 115. Accommodation cavity; 116. Limiting groove; 117 , the first splicing part; 1172, the first splicing cavity; 1174, the first splicing groove; 118, the second splicing part; 1182, the second splicing cavity; 1184, Second splicing groove; 120, moving unit; 121, reciprocating shaft; 122, moving body; 123, reciprocating groove; 130, rolling limiter; 200, impact component; 210, ram; 220, impact rod; 300, rotation Component; 310, rotating sleeve; 312, air inlet; 314, exhaust hole; 320, transmission unit; 321, transmission rod; 322, first transmission part; 323, first transmission gear; 324, second transmission gear; 325. Second transmission part; 330. Driving source.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be 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 invention. However, the present invention can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

Referring to Figures 1 and 2, the electric hammer 10 in one embodiment of the present invention can at least ensure the stability of transmission. Specifically, the electric hammer 10 includes a moving component 100 , an impact component 200 and a rotating component 300 . The moving assembly 100 includes a cylinder 110 and a moving unit 120. The moving unit 120 is connected to the cylinder 110 and is used to drive the cylinder 110 to move back and forth. The impact assembly 200 includes a ram 210, which is installed in the cylinder 110, and It is in sealing contact with the inner wall of the cylinder 110 so that a sealed impact chamber 111 is formed between the ram 210 and the inner wall of the cylinder 110. The ram 210 is movable in the cylinder 110; the rotating assembly 300 includes a rotating sleeve 310, a transmission unit 320 and a drive. Source 330, the cylinder 110 is installed in the rotating sleeve 310, the impact assembly 200 is installed in the rotating sleeve 310, the transmission unit 320 is transmission connected to the rotating sleeve 310, the driving source 330 is used to drive the rotating sleeve through the transmission unit 320 310 rotates relative to cylinder 110 .

The above-mentioned electric hammer 10 and ram 210 are disposed in the cylinder 110 and form a sealed impact chamber 111. Furthermore, when the moving unit 120 of the moving assembly 100 drives the cylinder 110 to reciprocate, the cylinder 110 moves relative to the impact chamber 110. The hammer 210 moves to compress the air in the impact chamber 111, and then uses the compressed air to impact the punch 210, thereby realizing the reciprocating impact motion of the punch 210. At the same time, the drill bit is arranged on the rotating sleeve 310. The driving source 330 drives the rotating sleeve 310 through the transmission unit 320 to drive the drill bit to rotate relative to the cylinder 110. The impact assembly 200 is arranged in the rotating sleeve 310, and then the hammer 210 is used to realize the drilling of the drill bit. The impact effect enables the drill bit to achieve reciprocating impact motion during the rotational motion. The above-mentioned electric hammer 10 realizes the drill bit rotation only through the transmission unit 320 and the rotating sleeve 310, and realizes the drill bit impact movement only through the cylinder 110 and the ram 210. The cylinder 110 and the ram 210 do not need to rotate synchronously to realize impact drive and rotation. The separation of the drive ensures the stability of the impact movement and rotational movement of the drill bit.

In one embodiment, the transmission unit 320 includes a transmission rod 321 and a first transmission member 322. One end of the transmission rod 321 is transmission connected to the rotating sleeve 310 through the first transmission member 322. The driving source 330 is used to drive the other end of the transmission rod 321 to rotate. . When the driving source 330 drives the transmission rod 321 to rotate, the first transmission member 322 can drive the rotating sleeve 310 to rotate synchronously.

In this embodiment, the driving source 330 and the rotating sleeve 310 are respectively located on one side of the opposite ends of the cylinder 110, and the transmission rod 321 is used to facilitate the transmission connection between the driving source 330 and the rotating sleeve 310. In other embodiments, the driving source 330 can also be located on one side of the rotating sleeve 310 , as long as the driving source 330 can drive the rotating sleeve 310 to rotate through the transmission unit 320 .

3 together, in this embodiment, the first transmission member 322 includes a first transmission gear 323 and a second transmission gear 324. The first transmission gear 323 is sleeved on one end of the transmission rod 321, and the second transmission gear 324 is sleeved on one end of the transmission rod 321. Disposed on the outer wall of the rotating sleeve 310, the second transmission gear 324 meshes with the first transmission gear 323. When the transmission rod 321 rotates, the first transmission gear 323 is driven to rotate, and then the second transmission gear 324 drives the rotating sleeve 310 to rotate. In other embodiments, other transmission gears may be provided between the first transmission gear 323 and the second transmission gear 324 .

Alternatively, in another embodiment, the second transmission gear 324 may also be formed inside the rotating sleeve 310 On the wall, the transmission rod 321 is inserted into the rotating sleeve 310 to realize the meshing of the first transmission gear 323 and the second transmission gear 324.

In one embodiment, the number of transmission rods 321 is at least two. Each transmission rod 321 is spaced around the rotation axis of the rotating sleeve 310 . Each transmission rod 321 is drivingly connected to the rotating sleeve 310 through a first transmission member 322 . The driving source 330 drives each transmission rod 321 to rotate synchronously. Specifically, each transmission rod 321 is evenly spaced around the outer wall of the rotating sleeve 310 . By driving the rotating sleeve 310 to rotate synchronously through at least two transmission rods 321, the stability of the rotational driving of the rotating sleeve 310 can be improved, thereby ensuring the stability of the drill bit rotation motion.

Specifically, the driving source 330 and the rotating sleeve 310 are respectively located on one side of the opposite ends of the cylinder 110. The transmission unit 320 also includes a second transmission member 325, and the other end of each transmission rod 321 is drivingly connected to the second transmission member 325. The driving source 330 is used to drive each transmission rod 321 to rotate synchronously through the second transmission member 325 . The second transmission member 325 is provided to facilitate the synchronous driving of each transmission rod 321, ensuring that each transmission rod 321 can synchronously drive the rotating sleeve 310, and further ensuring the rotation stability of the rotating sleeve 310.

In this embodiment, the second transmission member 325 is a planetary gear assembly. The planetary gear assembly drives each transmission rod 321 for synchronous transmission. In other embodiments, the second transmission member 325 can also be a chain transmission structure or a belt transmission structure, and the synchronous rotation of each transmission rod 321 is achieved through the transmission chain or transmission belt.

Referring to FIGS. 2 and 4 , in one embodiment, the length direction of the transmission rod 321 is the reciprocating direction of the cylinder 110 . A guide structure 112 is formed on the outer wall of the cylinder 110 . The guide structure 112 guides and cooperates with the transmission rod 321 . The transmission rod 321 can not only transmit rotation to the rotating sleeve 310, but also provide a guiding role for the movement of the cylinder 110, ensuring the stability of the reciprocating movement of the cylinder 110, thereby ensuring the stability of the reciprocating impact of the ram 210. Specifically, one end of the cylinder 110 with the punch 210 is inserted into the rotating sleeve 310 and can reciprocate in the rotating sleeve 310 along the axis direction of the rotating sleeve 310 . The rotation sleeve 310 can further limit the moving direction of the cylinder 110 .

In this embodiment, the guide structure 112 is a guide sleeve formed on the outer wall of the cylinder 110. The transmission rod 321 is inserted into the guide sleeve and can move in the guide sleeve to realize the guidance between the transmission rod 321 and the guide sleeve. Cooperate. Specifically, a matching sleeve is provided in the guide sleeve, and the transmission rod 321 is inserted into the matching sleeve. When the guide sleeve moves relative to the transmission rod 321 along the length direction of the transmission rod 321, the transmission rod 321 can rotate relative to the guide sleeve, thereby preventing direct frictional contact between the transmission rod 321 and the inner wall of the guide sleeve through the matching sleeve, thereby reducing the impact on the guide sleeve. wear and tear.

In other embodiments, a guide groove can also be directly formed on the outer wall of the cylinder 110 as a guide structure, and the transmission rod 321 is passed through the guide groove.

In one embodiment, the number of transmission rods 321 is at least two, and each transmission rod 321 is spaced around the rotation axis of the rotating sleeve 310. A guide structure 112 consistent with the number of transmission rods 321 is formed on the outer wall of the cylinder 110. Each transmission rod 321 is correspondingly guided and matched with a guide structure 112 . By cooperating and guiding the at least two transmission rods 321 with the guide structure 112 , the stability of the movement of the cylinder 110 can be further improved, and the cylinder 110 can be prevented from shaking during the movement, which affects the stability of the impact of the hammer 210 .

Specifically, each transmission rod 321 is evenly spaced around the rotation axis of the rotation sleeve 310 . Through the guide cooperation of the evenly arranged transmission rods 321 and the guide structure 112, not only the rotational transmission force of the rotating sleeve 310 is more uniform, but also the impact force generated by the cylinder 110 when driving the hammer 210 to perform reciprocating impact motion is more uniform. , can effectively improve the service life of the electric hammer 10. In this embodiment, the transmission rod 321 is a cylindrical rod, and the space in the guide sleeve is a round hole to ensure the effective rotation of the transmission rod 321.

In one embodiment, the driving source 330 is used to drive the moving unit 120 to drive the cylinder 110 to reciprocate. Through one driving source 330, both the transmission unit 320 and the moving unit 120 can be driven to achieve rotational output, which can simplify the structure of the electric hammer 10. In this embodiment, the driving source 330 is a motor. Specifically, the output shaft of the driving source 330 is connected to the moving unit 120, and the second transmission member 325 is sleeved on the output shaft. This makes the structure of the electric hammer 10 more compact and lightweight.

In one embodiment, the cylinder 110 includes an impact cylinder part 113 and a moving cylinder part 114 connected to the impact cylinder part 113. The moving unit 120 is connected to the moving cylinder part 114; the ram 210 is inserted into the impact cylinder part 113. , the impact cylinder part 113 is installed in the rotating sleeve 310; the moving cylinder part 114 and the transmission rod 321 are located outside the rotating sleeve 310, and the guide structure 112 is formed on the outer wall of the moving cylinder part 114. By arranging the transmission rod 321 and the guide structure 112 outside the rotating sleeve 310, it is convenient to ensure the stability of the rotation of the drill bit driven by the rotating sleeve 310.

Specifically, a sealed impact chamber 111 is formed between the ram 210 and the inner wall of the impact cylinder portion 113 , and the connection positions of the impact cylinder portion 113 and the moving cylinder portion 114 are separated and connected by partitions to form a sealed impact chamber 111 . Furthermore, the impact cylinder portion 113 has an opening on a side facing away from the moving cylinder portion 114 , and the hammer 210 can be inserted into the impact cylinder portion 113 through the opening of the impact cylinder portion 113 .

In this embodiment, the diameter of the outer wall of the impact cylinder portion 113 is consistent with the diameter of the corresponding inner wall of the rotating sleeve 310 . Since the impact cylinder part 113 can reciprocate within the rotating sleeve 310 , by setting the diameter of the outer wall of the impact cylinder part 113 to be consistent with the diameter of the inner wall of the rotating sleeve 310 , the stability of the moving direction of the impact cylinder part 113 can be further ensured.

Referring to Figure 3 again, in one embodiment, the outer wall of the rotating sleeve 310 is provided with an air inlet hole 312 and an exhaust hole 314. The air inlet hole 312 and the exhaust hole 314 are spaced apart along the axis of the rotating sleeve 310. When the cylinder part 113 moves back and forth in the rotating sleeve 310 to the maximum stroke, it covers the air inlet hole 312. When it moves to the minimum stroke, the ram 210 does not cover the air inlet hole 312, and the impact cylinder part 113 does not cover the air inlet hole 312 during the reciprocating movement. Cover vent 314. Stable movement of the punch 210 in the rotating sleeve 310 is achieved through the air inlet hole 312 and the exhaust hole 314 to avoid being affected by air pressure and affecting the impact motion of the punch 210.

Referring to Figures 2 and 4, in one 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 curved guide rail surrounding the axis of the reciprocating shaft 121, and the curve is The crests and troughs of the guide rail are spaced apart along the axis of the reciprocating shaft 121; the moving body 122 It is limited on the cylinder 110 and can move on the reciprocating guide rail; the driving source 330 is used to drive the reciprocating shaft 121 to rotate, so that the moving body 122 drives the cylinder 110 to reciprocate along the axis direction of the reciprocating shaft 121 .

In this embodiment, the driving source 330 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 peaks and the wave troughs of the curved guide rail, so as to realize the moving body 122 reciprocating along the axis direction of the reciprocating shaft 121 The purpose of movement is to drive the cylinder 110 to achieve the purpose of reciprocating along the axial direction of the reciprocating shaft 121 .

In this embodiment, the reciprocating guide rail is a reciprocating groove 123. The reciprocating groove 123 is a closed curved groove surrounding the axis of the reciprocating shaft 121, and the wave peaks and troughs of the curved groove are spaced along the axis of the reciprocating shaft 121; the moving body 122 It is penetrated in the reciprocating groove 123 and can move 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 above-mentioned mobile unit 120 realizing the reciprocating movement of the cylinder 110 through a crank structure or an eccentric drive structure, the crank structure and the eccentric drive structure need to realize the conversion of the reciprocating movement through swinging, and then there is a yaw angle, and there is a bias force friction to perform work. problem, resulting in poor performance stability. However, the rotational motion of the reciprocating shaft 121 of the mobile unit 120 of the present application is converted into the linear motion of the cylinder 110, so there will be no yaw intersection and the performance stability will be better.

In another embodiment, the driving source 330 only drives the rotating sleeve 310 to rotate through the transmission unit 320 . The moving assembly 100 also includes a power source, which is used to drive the moving unit 120 to drive the cylinder 110 to move back and forth. Specifically, the driving source 330 is located on one side of the rotating sleeve 310, engages with the transmission rod 321 through the transmission gear, and drives the transmission rod 321 to rotate, so as to drive the rotation sleeve 310 to rotate. The power source is located on a side of the cylinder 110 facing away from the rotating sleeve 310 .

By driving the rotating sleeve 310 to rotate and the cylinder 110 to reciprocate respectively through the driving source 310 and the power source, it is easy to control the rotational speed of the rotating sleeve 310 and the moving speed of the cylinder 110 respectively, thereby achieving different hammer-to-drill ratios of the drill bit with higher efficiency. .

Further, the power source is used to drive the reciprocating shaft 121 to rotate, so that the moving body 122 drives the cylinder 110 to reciprocate along the axis direction of the reciprocating shaft 121 .

In another embodiment, the reciprocating guide rail is a guide protrusion, and the guide protrusion is a closed strip-shaped curved protrusion surrounding the axis of the reciprocating shaft 121, and the peaks and troughs of the curved protrusion are spaced apart along the axis of the reciprocating shaft 121; move The body 122 is disposed on the guide protrusion and can move along the length direction on the guide protrusion.

In one embodiment, there are at least two reciprocating guide rails, each reciprocating guide rail is spaced along the axis of the reciprocating shaft 121 , and at least one moving body 122 is provided on each reciprocating guide rail. By arranging at least two reciprocating guide rails, the stability of the movement of the cylinder 110 driven by the moving body 122 can be improved.

In one embodiment, there may be two movable bodies 122. The two movable bodies 122 are evenly spaced around the axis of the reciprocating shaft 121, and the two movable bodies 122 can move synchronously during the reciprocating movement. By synchronously moving the two moving bodies 122 to drive the cylinder 110 to move, the stability of the movement of the cylinder 110 can be further improved and the stability of the force of the cylinder 110 can be ensured. In other embodiments, there may be one moving body 122 . Or there may be other numbers of movable bodies 122, and each movable body 122 can move synchronously in the same direction.

In another embodiment, the reciprocating shaft 121 is also provided with a balance guide rail that is spaced opposite to the reciprocating guide rail along the axis of the reciprocating shaft 121. The balance guide rail is a closed curve guide rail surrounding the axis of the reciprocating shaft 121, and the wave crest of the balance guide rail is The wave troughs are arranged at intervals along the axis of the reciprocating shaft 121; and the wave crests of the balance guide rail are opposite to the wave troughs of the reciprocating guide rail along the axial direction, and the wave troughs of the balance guide rail are opposite to the wave crests of the reciprocating guide rail along the axial direction. A balance body is provided on the balance guide rail. The balance body and the moving body 122 are arranged oppositely along the axis of the reciprocating shaft 121. When the reciprocating shaft 121 rotates, the balance body and the moving body 122 move toward or away from each other. By arranging the balance guide rail and the balance body, the two-way acceleration during the movement of the balance body and the moving body 122 can be offset, thereby reducing the vibration caused by acceleration.

Specifically, the balance guide rail has the same structure as the reciprocating guide rail, and the balance guide rail is symmetrically arranged relative to the reciprocating guide rail along the circumference of the power shaft. In this embodiment, the balance body and the moving body 122 have the same structure.

Referring to Figures 4, 5 and 6 together, in one embodiment, an accommodating cavity 115 is formed in the moving cylinder portion 114 of the cylinder 110, the reciprocating shaft 121 is disposed in the accommodating cavity 115, and the accommodating cavity 115 A limiting groove 116 is formed on the inner wall, and the moving body 122 is limited between the inner wall of the limiting groove 116 and the inner wall of the reciprocating groove 123 . Specifically, part of the moving body 122 is disposed in the limiting groove 116 , and the remaining part is disposed in the reciprocating groove 123 . By disposing the reciprocating shaft 121 in the accommodating cavity 115, the rotation of the reciprocating shaft 121 occurs in the accommodating cavity 115, and the moving body 122 is limited between the reciprocating groove 123 and the limiting groove 116, ensuring that the moving body 122 The stability of the limit ensures the stability of the movement of the cylinder 110 driven by the moving body 122.

In this embodiment, the accommodation cavity 115 passes through the side of the moving cylinder portion 114 facing away from the impact cylinder portion 113 , so that the reciprocating shaft 121 can be inserted through the side of the moving cylinder portion 114 facing away from the impact cylinder portion 113 . in the accommodation cavity 115.

In one embodiment, the moving assembly 100 further includes a rolling limiter 130. The rolling limiter 130 is disposed in the limit groove 116. The moving body 122 is a sphere, and the sphere is rollably disposed between the rolling limiter 130 and the reciprocating member. between the inner walls of groove 123. The rolling limiter 130 prevents the moving body 122 from directly rolling and rubbing against the inner wall of the limiting groove 116 . Specifically, a hemispherical groove is formed in the rolling stopper 130, and the moving body 122 is disposed in the hemispherical groove and can roll.

In one embodiment, the moving cylinder part 114 of the cylinder 110 includes a first splicing part 117 and a second splicing part 118. The first splicing part 117 is connected to the impact cylinder part 113, and a first splicing cavity is formed in the first splicing part 117. 1172. A first splicing groove 1174 is formed on the inner wall of the first splicing cavity 1172 and opens on the side facing away from the impact cylinder part 113. A second splicing cavity 1182 is formed in the second splicing part 118. The second splicing cavity 1182 is A second splicing groove 1184 is formed on the inner wall, and one side of the second splicing part 118 is open, and the opening side of the second splicing part 118 is butted with the opening side of the first splicing part 117, so that the first splicing cavity 1172 is connected with the second splicing part 117. The cavities 1182 are correspondingly connected to form the accommodation cavity 115 , and the first splicing groove 1174 and the second splicing groove 1184 are correspondingly connected to form the limiting groove 116 . Since the moving body 122 is limited in the limiting groove 116, and the reciprocating shaft 121 passes through the accommodation The cavity 115 and the first splicing part 117 and the second splicing part 118 can facilitate the installation of the moving body 122 in the limiting groove 116 and ensure the effective limiting of the moving body 122 in the limiting groove 116 .

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

In one embodiment, the first splicing part 117 and the second splicing part 118 are welded and connected. In other embodiments, the first splicing part 117 and the second splicing part 118 may also be connected by screws or snapped together.

In one embodiment, for the single guide structure 112, a part is formed on the outer wall of the first splicing part 117, and the other part is formed on the outer wall of the second splicing part 118. The first splicing part 117 and the second splicing part 118 are spliced together to form the guide structure 112 by splicing the two parts. Since the transmission rod 321 guides and cooperates with the guide structure 112, by forming part of the guide structure 112 in both the first splicing part 117 and the second splicing part 118, the transmission rod 321 can be formed with both the first splicing part 117 and the second splicing part 118. Guided fit.

In other embodiments, the guide structure 112 may be formed solely on the first splicing part 117 or separately on the second splicing part 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 ram 210 facing away from the cylinder 110 . The punch 210 can impact the drill bit in the rotating sleeve 310 through the impact rod 220 .

In one embodiment, the electric hammer 10 further includes a protective shell (not shown). The moving component 100 and the rotating component 300 are both disposed in the protective shell. The moving component 100 and the rotating component 300 are protected by the protective shell. Specifically, a lubricating oil chamber is formed in the protective shell, and the transmission unit 320 and the moving assembly 100 are both located in the lubricating oil chamber. Further, the transmission rod 321, the first transmission member 311 and the moving component 100 are all located in the lubricating oil chamber. By adding lubricating oil to the lubricating oil chamber, the stability of the transmission between the transmission rod 321, the first transmission part 311 and the moving assembly 100 can be ensured, and the life of each component can be improved. It can also facilitate the increase of the reciprocating speed and rotation speed, and improve the The impact power of the electric hammer 10.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-mentioned embodiments only express several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the device or device referred to. Elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified limitations. For those of ordinary skill in the art, it can be understood according to specific circumstances The specific meanings of the above terms in the present invention.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Claims

An electric hammer, characterized in that the electric hammer includes:

Moving assembly, the moving assembly includes a cylinder and a moving unit, the moving unit is connected to the cylinder and is used to drive the cylinder to reciprocate;

Impact assembly, the impact assembly includes a ram, the ram penetrates the cylinder and is in sealing contact with the inner wall of the cylinder, so that a seal is formed between the ram and the inner wall of the cylinder. An impact chamber, the ram is movable within the cylinder; and

Rotating component, the rotating component includes a rotating sleeve, a transmission unit and a driving source, the cylinder is disposed in the rotating sleeve, the impact component is disposed in the rotating sleeve, the transmission unit The transmission is connected to the rotating sleeve, and the driving source is used to drive the rotating sleeve to rotate relative to the cylinder through the transmission unit.
The electric hammer according to claim 1, characterized in that the transmission unit includes a transmission rod and a first transmission part, one end of the transmission rod is drivingly connected to the rotating sleeve through the first transmission part, and the The driving source is used to drive the other end of the transmission rod to rotate.
The electric hammer according to claim 2, characterized in that the length direction of the transmission rod is the reciprocating movement direction of the cylinder, a guide structure is formed on the outer wall of the cylinder, and the guide structure is connected with the reciprocating movement of the cylinder. Drive rod guide fit.
The electric hammer according to claim 3, wherein the cylinder includes an impact cylinder part and a moving cylinder part connected to the impact cylinder part, and the moving unit is connected to the moving cylinder part; The ram is installed in the impact cylinder part, and the impact cylinder part is installed in the rotating sleeve; wherein the moving cylinder part and the transmission rod are both located outside the rotating sleeve, and the guide structure is formed on on the outer wall of the moving cylinder part.
The electric hammer according to claim 4, wherein the diameter of the outer wall of the impact cylinder is consistent with the diameter of the corresponding inner wall of the rotating sleeve.
The electric hammer according to claim 4, characterized in that the number of the transmission rods is at least two, each of the transmission rods is arranged at intervals around the rotation axis of the rotation sleeve, and each transmission rod passes through a The first transmission member is drivingly connected to the rotating sleeve; the outer wall of the cylinder is formed with the guide structure consistent with the number of the transmission rods, and each of the transmission rods is corresponding to one of the guide structures. Cooperate.
The electric hammer according to claim 6, characterized in that the driving source and the rotating sleeve are respectively located on one side of the opposite ends of the cylinder, and the transmission unit further includes a second transmission member, each of the The other ends of the transmission rods are all drivingly connected to the second transmission member, and the driving source is used to drive each of the transmission rods to rotate synchronously through the second transmission member.
The electric hammer according to claim 4, wherein the moving unit includes a reciprocating shaft and a moving body, a reciprocating guide rail is provided on the reciprocating shaft, and the reciprocating guide rail is in the shape of a closed curve surrounding the axis of the reciprocating shaft. guide rail, and the wave crests and troughs of the curved guide rail are spaced along the axis of the reciprocating shaft; the moving body is limited to the cylinder and can move on the reciprocating guide rail;

Wherein, the driving source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder to reciprocate along the axis direction of the reciprocating shaft; or the moving component further includes a power source, and the power The source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder to reciprocate along the axis direction of the reciprocating shaft.
The electric hammer according to claim 8, wherein the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curved groove surrounding the axis of the reciprocating shaft, and the moving body is inserted through the reciprocating groove. and can move in the reciprocating groove; an accommodating cavity is formed in the moving cylinder part of the cylinder body, the reciprocating shaft is disposed in the accommodating cavity, and a limited number is formed on the inner wall of the accommodating cavity. position slot, the moving body is limited between the inner wall of the limiting slot and the inner wall of the reciprocating slot.
The electric hammer according to claim 8, characterized in that the reciprocating shaft is further provided with a The reciprocating guide rails are balance guide rails arranged relatively at intervals along the axis of the reciprocating shaft. The balance guide rail is a closed curved guide rail surrounding the axis of the reciprocating shaft, and the wave peaks and troughs of the balance guide rail are along the axis of the reciprocating shaft. arranged at intervals; and the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axial direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axial direction; a balance body is provided on the balance guide rail, The balance body and the moving body are arranged oppositely along the axis of the reciprocating shaft. When the reciprocating shaft rotates, the balancing body and the moving body move toward or away from each other.
The electric hammer according to any one of claims 1 to 10, characterized in that it also includes a protective shell, a lubricating oil chamber is formed in the protective shell, and the transmission unit and the moving component are located in the lubricating oil chamber. inside the cavity.