Electric hammer

Abstract

The present application relates to a kind of electric hammer, electric hammer includes moving assembly, impact assembly and rotating assembly, moving assembly includes cylinder and moving unit, impact assembly includes hammer, rotating assembly includes rotating sleeve, transmission unit and drive source.Hammer is worn in cylinder, and forms sealed impact chamber, when moving unit drives cylinder reciprocating movement, cylinder moves relative to hammer, to compress the air in impact chamber, impact hammer using compressed air, realize the reciprocating impact motion of hammer.Simultaneously, drill bit is set on rotating sleeve, drive source drives rotating sleeve relative to cylinder through transmission unit and drives drill bit rotation, and impact assembly is set in rotating sleeve, then impact hammer is used to realize the impact effect of drill bit.Realize the rotation of drill bit through transmission unit and rotating sleeve, realize the impact motion of drill bit through cylinder and hammer, realize the separation of impact drive and rotation drive, guarantee the stability of the impact motion and rotation motion drive of drill bit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to an electric hammer. BACKGROUND

[0002] The principle of electric hammer is that the transmission mechanism drives the drill bit to rotate and also controls the drill bit to reciprocate and hammer. The traditional electric hammer drives the piston to reciprocate and compress air in a cylinder by the transmission mechanism, the air pressure in the cylinder periodically changes to drive the hammer in the cylinder to reciprocate and hit, and the cylinder drives the drill bit to rotate. The traditional electric hammer needs to drive the drill bit to rotate and also needs to drive the hammer to reciprocate, which leads to unstable transmission and affects the use of the electric hammer. SUMMARY

[0003] Therefore, it is necessary to provide an electric hammer with more stable transmission in view of the above problems.

[0004] An electric hammer, comprising a moving assembly, an impact assembly and a rotating assembly, the moving assembly comprises a cylinder and a moving unit, the moving unit is connected to the cylinder and is used to drive the cylinder to reciprocate, the impact assembly comprises a hammer, the hammer is arranged 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 hammer and the inner wall of the cylinder, and the hammer is movable in the cylinder, the rotating assembly comprises a rotating sleeve, a transmission unit and a driving source, the cylinder is arranged in the rotating sleeve, the impact assembly is arranged in the rotating sleeve, the transmission unit is in transmission connection with the rotating sleeve, and the driving source is used to drive the rotating sleeve to rotate relative to the cylinder through the transmission unit.

[0005] In one embodiment, the transmission unit comprises a transmission rod and a first transmission part, one end of the transmission rod is in transmission connection with the rotating sleeve through the first transmission part, and the driving source is used to drive the other end of the transmission rod to rotate.

[0006] In one embodiment, the length direction of the transmission rod is the reciprocating direction of the cylinder, a guide structure is formed on the outer wall of the cylinder, and the guide structure is in guide cooperation with the transmission rod.

[0007] In one embodiment, the cylinder comprises an impact cylinder part and a moving cylinder part connected with the impact cylinder part, the moving unit is connected to the moving cylinder part, the hammer is arranged in the impact cylinder part, the impact cylinder part is arranged in 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.

[0008] In one of the embodiments, the diameter of the outer wall of the impact cylinder part is consistent with the diameter of the inner wall of the corresponding rotating sleeve.

[0009] In one of the embodiments, 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 rotating sleeve, and each of the transmission rods is in transmission connection with the rotating sleeve through a first transmission member; the outer wall of the cylinder body is formed with the guide structures consistent with the number of the transmission rods, and each of the transmission rods is in guide cooperation with a corresponding guide structure.

[0010] In one of the embodiments, the driving source and the rotating sleeve are located at one side of opposite ends of the cylinder body respectively, the transmission unit further comprises a second transmission member, one end of each of the transmission rods is in transmission connection with 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.

[0011] In one of the embodiments, the moving unit comprises a reciprocating shaft and a moving body, the reciprocating shaft is provided with a reciprocating guide rail, the reciprocating guide rail is a closed curve-shaped guide rail surrounding the axis of the reciprocating shaft, and the wave crest and the wave trough 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.

[0012] In one of the embodiments, the driving source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder body to reciprocate along the axis direction of the reciprocating shaft; or the moving assembly further comprises a power source, and the power source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder body to reciprocate along the axis direction of the reciprocating shaft.

[0013] In one of the embodiments, the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curve-shaped groove surrounding the axis of the reciprocating shaft, the moving body is arranged in the reciprocating groove and can move in the reciprocating groove; the moving cylinder part of the cylinder body is formed with a receiving cavity, the reciprocating shaft is arranged in the receiving cavity, and the inner wall of the receiving cavity is formed with a limiting groove, and the moving body is limited between the inner wall of the limiting groove and the inner wall of the reciprocating groove.

[0014] In one of the embodiments, the reciprocating shaft is further provided with a balance guide rail opposite to the reciprocating guide rail along the axis of the reciprocating shaft, the balance guide rail is a closed curve guide rail around the axis of the reciprocating shaft, and the peaks and valleys of the balance guide rail are opposite along the axis of the reciprocating shaft; the peak of the balance guide rail is opposite to the valley of the reciprocating guide rail along the axis, and the valley of the balance guide rail is opposite to the peak of the reciprocating guide rail along the axis; the balance guide rail is provided with a balance body opposite to the moving body along the axis of the reciprocating shaft, and the balance body moves towards or away from the moving body when the reciprocating shaft rotates.

[0015] In one of the embodiments, the electric hammer further comprises a protective shell, and a lubricating oil cavity is formed in the protective shell, and the transmission unit and the moving assembly are located in the lubricating oil cavity.

[0016] The electric hammer is provided with the hammer penetrating into the cylinder body and forming a sealed impact cavity, so that when the moving unit of the moving assembly drives the cylinder body to reciprocate, the cylinder body moves relative to the hammer to compress the air in the impact cavity, and then the compressed air impacts the hammer to realize the reciprocating impact movement of the hammer. Meanwhile, the drill bit is arranged on the rotating sleeve, the driving source drives the rotating sleeve relative to the cylinder body to drive the drill bit to rotate through the transmission unit, and the impact assembly is arranged in the rotating sleeve, so that the hammer is used to impact the drill bit, and the reciprocating impact movement of the drill bit is realized in the process of rotating movement. The rotation of the drill bit is realized only by the transmission unit and the rotating sleeve, the impact movement of the drill bit is realized only by the cylinder body cooperating with the hammer, the cylinder body and the hammer do not need to rotate synchronously, the separation of the impact driving and the rotation driving is realized, and the stability of the driving of the impact movement and the rotation movement of the drill bit is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are presented to explain and not to limit the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] In addition, the drawings are not drawn in the ratio of 1:1, and the relative sizes of the various elements are only exemplarily drawn in the drawings, but not necessarily drawn in true proportion. In the drawings:

[0020] Figure 1 It is an embodiment of the structure of the electric hammer.

[0021] Figure 2 for Figure 1 a cross-sectional view of the electric hammer shown in

[0022] Figure 3 for Figure 2 a structural schematic view of the rotating sleeve in the middle;

[0023] Figure 4 for Figure 2 a partial exploded view of the moving assembly and the transmission rod in the middle;

[0024] Figure 5 for Figure 4 a structural schematic view of the cylinder in the middle;

[0025] Figure 6 for Figure 5 a cross-sectional view of the cylinder shown in

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 10, electric hammer; 100, moving assembly; 110, cylinder; 111, impact cavity; 112, guide structure; 113, impact cylinder part; 114, moving cylinder part; 115, containing cavity; 116, limiting groove; 117, first splicing part; 1172, first splicing cavity; 1174, first splicing groove; 118, second splicing part; 1182, second splicing cavity; 1184, second splicing groove; 120, moving unit; 121, reciprocating shaft; 122, moving body; 123, reciprocating groove; 130, rolling limiting piece; 200, impact assembly; 210, impact hammer; 220, impact rod; 300, rotating assembly; 310, rotating sleeve; 312, air inlet hole; 314, air outlet hole; 320, transmission unit; 321, transmission rod; 322, first transmission piece; 323, first transmission gear; 324, second transmission gear; 325, second transmission piece; 330, driving source. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application 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 present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the present application. The specific embodiments of the present application are not intended to be exhaustive or to be limited to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.

[0029] Referring to Figure 1 and Figure 2The electric hammer 10 in an embodiment of the present application can at least ensure the stability of transmission. Specifically, the electric hammer 10 comprises a moving assembly 100, an impact assembly 200 and a rotating assembly 300. The moving assembly 100 comprises 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 comprises a hammer 210, the hammer 210 is arranged in the cylinder 110 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 is movable in the cylinder 110; the rotating assembly 300 comprises a rotating sleeve 310, a transmission unit 320 and a driving source 330, the cylinder 110 is arranged in the rotating sleeve 310, the impact assembly 200 is arranged in the rotating sleeve 310, the transmission unit 320 is in transmission connection with the rotating sleeve 310, and the driving source 330 is used to drive the rotating sleeve 310 to rotate relative to the cylinder 110 through the transmission unit 320.

[0030] The electric hammer 10 described above, the hammer 210 is arranged in the cylinder 110 and forms a sealed impact cavity 111, and then when the moving unit 120 of the moving assembly 100 drives the cylinder 110 to move back and forth, the cylinder 110 moves relative to the hammer 210 to compress the air in the impact cavity 111, and then the compressed air impacts the hammer 210 to realize the reciprocating impact motion of the hammer 210. At the same time, the drill bit is arranged on the rotating sleeve 310, the driving source 330 drives the rotating sleeve 310 to rotate relative to the cylinder 110 through the transmission unit 320 to drive the drill bit to rotate, and the impact assembly 200 is arranged in the rotating sleeve 310, and then the hammer 210 is used to realize the impact on the drill bit, and then the reciprocating impact motion of the drill bit is realized in the process of rotating motion. The electric hammer 10 described above realizes the rotation of the drill bit only through the transmission unit 320 and the rotating sleeve 310, realizes the impact motion of the drill bit only through the cylinder 110 cooperating with the hammer 210, and the cylinder 110 and the hammer 210 do not need to rotate synchronously, realizes the separation of impact driving and rotation driving, and ensures the stability of the driving of the impact motion and the rotating motion of the drill bit.

[0031] In an embodiment, the transmission unit 320 comprises a transmission rod 321 and a first transmission member 322, one end of the transmission rod 321 is in transmission connection with the rotating sleeve 310 through the first transmission member 322, and 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 rotating sleeve 310 can be driven to rotate synchronously through the first transmission member 322.

[0032] In the embodiment, the driving source 330 and the rotating sleeve 310 are located at the opposite ends of the cylinder body 110 respectively, and then the driving source 330 and the rotating sleeve 310 are connected through the transmission rod 321. In other embodiments, the driving source 330 can also be located at 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.

[0033] Referring to Figure 3 In the 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 the outer wall of the rotating sleeve 310. The second transmission gear 324 is engaged with the first transmission gear 323. When the transmission rod 321 rotates, the first transmission gear 323 is driven to rotate, and then the rotating sleeve 310 is driven to rotate through the second transmission gear 324. In other embodiments, other transmission gears can also be arranged between the first transmission gear 323 and the second transmission gear 324.

[0034] Alternatively, in another embodiment, the second transmission gear 324 can also be formed on the inner wall of the rotating sleeve 310, and the transmission rod 321 is arranged in the rotating sleeve 310 to realize the engagement between the first transmission gear 323 and the second transmission gear 324.

[0035] In an embodiment, the number of the transmission rods 321 is at least two, and each transmission rod 321 is arranged at intervals around the rotation axis of the rotating sleeve 310. Each transmission rod 321 is connected with 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 arranged at intervals around the outer wall of the rotating sleeve 310. The rotating sleeve 310 is driven to rotate synchronously by the at least two transmission rods 321, which can improve the stability of the rotating sleeve 310, and further ensure the stability of the rotary motion of the drill bit.

[0036] Specifically, the driving source 330 and the rotating sleeve 310 are located at the opposite ends of the cylinder body 110 respectively, and the transmission unit 320 further includes a second transmission member 325. The other end of each transmission rod 321 is connected with the second transmission member 325, and 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 arranged to facilitate the synchronous driving of each transmission rod 321, so that each transmission rod 321 can drive the rotating sleeve 310 synchronously, and further ensure the stability of the rotating sleeve 310.

[0037] In the embodiment, the second transmission member 325 is a planetary gear assembly. The planetary gear assembly drives the transmission rods 321 to rotate synchronously. In other embodiments, the second transmission member 325 can also be a chain transmission structure or a belt transmission structure, and the transmission chain or the transmission belt drives the transmission rods 321 to rotate synchronously.

[0038] Referring to Figure 2 and Figure 4 In an embodiment, the length direction of the transmission rod 321 is the reciprocating direction of the cylinder body 110. The outer wall of the cylinder body 110 is provided with a guide structure 112, and the guide structure 112 is in guiding cooperation with the transmission rod 321. The transmission rod 321 not only transmits rotation to the rotating sleeve 310, but also provides a guiding function for the movement of the cylinder body 110, thereby ensuring the stability of the reciprocating movement of the cylinder body 110 and the stability of the reciprocating impact of the hammer 210. Specifically, the cylinder body 110 is provided with the hammer 210 at one end, and the hammer 210 is arranged in the rotating sleeve 310 and can reciprocate along the axis direction of the rotating sleeve 310. The rotating sleeve 310 can further limit the movement direction of the cylinder body 110.

[0039] In the embodiment, the guide structure 112 is a guide sleeve formed on the outer wall of the cylinder body 110. The transmission rod 321 is arranged in the guide sleeve and can move in the guide sleeve to realize the guiding cooperation between the transmission rod 321 and the guide sleeve. Specifically, the guide sleeve is provided with a matching sleeve, and the transmission rod 321 is arranged in the matching sleeve. When the guide sleeve moves along the length direction of the transmission rod 321 relative to the transmission rod 321, the transmission rod 321 is rotatable relative to the guide sleeve, and the matching sleeve avoids the direct frictional contact between the transmission rod 321 and the inner wall of the guide sleeve, thereby reducing the wear of the guide sleeve.

[0040] In other embodiments, a guide groove can be directly formed on the outer wall of the cylinder body 110 as a guide structure, and the transmission rod 321 is arranged in the guide groove.

[0041] In an embodiment, the number of transmission rods 321 is at least two, and each transmission rod 321 is arranged at intervals around the rotation axis of the rotating sleeve 310. The outer wall of the cylinder body 110 is provided with guide structures 112 corresponding to the number of transmission rods 321, and each transmission rod 321 is in guiding cooperation with a guide structure 112. The guiding cooperation between the at least two transmission rods 321 and the guide structures 112 can further improve the stability of the movement of the cylinder body 110 and avoid the shaking of the cylinder body 110 during the movement, thereby affecting the stability of the impact of the hammer 210.

[0042] Specifically, each transmission rod 321 is uniformly spaced around the rotation axis of the rotating sleeve 310. Through the uniform arrangement of the transmission rod 321 and the guiding cooperation of the guide structure 112, not only the rotation transmission of the rotating sleeve 310 is more uniform, but also the impact force generated by the cylinder body 110 when driving the ram 210 to do reciprocating impact motion is more uniform, which can effectively improve the service life of the electric hammer 10. In the embodiment, the transmission rod 321 is a cylindrical rod, and the space in the guide sleeve is a circular hole, which ensures the effective rotation of the transmission rod 321.

[0043] In an embodiment, the driving source 330 is used to drive the moving unit 120 to drive the cylinder body 110 to reciprocate. Through one driving source 330, both the rotation output of the transmission unit 320 and the movement output of the moving unit 120 can be realized, which can facilitate the simplification of the structure of the electric hammer 10. In the 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 light.

[0044] In an embodiment, the cylinder body 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 ram 210 is arranged in the impact cylinder portion 113, and the impact cylinder portion 113 is arranged in the rotating sleeve 310; wherein the moving cylinder portion 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 portion 114. By arranging the transmission rod 321 and the guide structure 112 outside the rotating sleeve 310, the stability of the rotating sleeve 310 driving the drill bit to rotate can be ensured.

[0045] Specifically, a sealed impact chamber 111 is formed between the ram 210 and the inner wall of the impact cylinder portion 113, and then the connection position of the impact cylinder portion 113 and the moving cylinder portion 114 is connected by a partition plate, so as to form a sealed impact chamber 111. Further, the impact cylinder portion 113 is opened on the side away from the moving cylinder portion 114, and the ram 210 can be arranged in the impact cylinder portion 113 through the opening of the impact cylinder portion 113.

[0046] In the embodiment, the diameter of the outer wall of the impact cylinder portion 113 is consistent with the diameter of the inner wall of the corresponding rotating sleeve 310. Since the impact cylinder portion 113 can reciprocate in the rotating sleeve 310, by setting the diameter of the outer wall of the impact cylinder portion 113 consistent with the diameter of the inner wall of the rotating sleeve 310, the stability of the moving direction of the impact cylinder portion 113 can be further ensured.

[0047] Again, refer to Figure 3In an embodiment, the outer wall of the rotating sleeve 310 is provided with an air inlet hole 312 and an air outlet hole 314, the air inlet hole 312 and the air outlet hole 314 are arranged along the axis of the rotating sleeve 310, when the impact cylinder portion 113 moves to the maximum stroke in the rotating sleeve 310, the impact cylinder portion 113 covers the air inlet hole 312, when the impact cylinder portion 113 moves to the minimum stroke, the impact hammer 210 does not cover the air inlet hole 312, and the impact cylinder portion 113 does not cover the air outlet hole 314 during the reciprocating movement. The stable movement of the impact hammer 210 in the rotating sleeve 310 is realized through the air inlet hole 312 and the air outlet hole 314, and the impact movement of the impact hammer 210 is avoided from being affected by the air pressure.

[0048] Referring to Figure 2 and Figure 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 around the axis of the reciprocating shaft 121, and the peaks and troughs of the curve-shaped guide rail are arranged 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; and the driving source 330 is used to drive the reciprocating shaft 121 to rotate, so that the moving body 122 drives the cylinder body 110 to reciprocate along the axis direction of the reciprocating shaft 121.

[0049] In the 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, and then the moving body 122 can move between the peaks and troughs of the curve-shaped guide rail, so as to realize the purpose of reciprocating movement of the moving body 122 along the axis direction of the reciprocating shaft 121, and then drive the cylinder body 110 to realize the purpose of reciprocating movement along the axis direction of the reciprocating shaft 121.

[0050] In the embodiment, the reciprocating guide rail is a reciprocating groove 123, the reciprocating groove 123 is a closed curve-shaped groove around the axis of the reciprocating shaft 121, and the peaks and troughs of the curve-shaped groove are arranged along the axis of the reciprocating shaft 121; the moving body 122 is arranged in the reciprocating groove 123 and can move in the reciprocating groove 123.

[0051] In the embodiment, the moving body 122 is a ball, and the ball can roll in the reciprocating groove 123.

[0052] Compared with the reciprocating movement of the cylinder body 110 realized by the crank structure or the eccentric driving structure, the crank structure and the eccentric driving structure need to realize the conversion of reciprocating movement through swinging, and then there is a deflection angle, and there is a problem of deflection force friction work, which leads to poor work stability. The rotational movement of the reciprocating shaft 121 of the moving unit 120 of the present application is converted into the linear movement of the cylinder body 110, and there is no deflection, and the work stability is better.

[0053] In another embodiment, the driving source 330 drives the rotating sleeve 310 to rotate only through the transmission unit 320. The moving assembly 100 further comprises a power source for driving the moving unit 120 to drive the cylinder 110 to move reciprocally. Specifically, the driving source 330 is located at 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 to drive the rotating sleeve 310 to rotate. The power source is located at the side of the cylinder 110 which is away from the rotating sleeve 310.

[0054] By driving the rotating sleeve 310 to rotate and the cylinder 110 to move reciprocally through the driving source 310 and the power source respectively, the rotating speed of the rotating sleeve 310 and the moving speed of the cylinder 110 can be controlled respectively, so that different hammering-to-drilling ratios of the drill bit can be realized, and the efficiency is higher.

[0055] 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 move reciprocally along the axis of the reciprocating shaft 121.

[0056] In another embodiment, the reciprocating guide is a guide protrusion, the guide protrusion is a closed strip curve protrusion surrounding the axis of the reciprocating shaft 121, and the peaks and valleys of the curve protrusion are arranged along the axis of the reciprocating shaft 121; the moving body 122 is arranged on the guide protrusion and can move along the length direction of the guide protrusion.

[0057] In an embodiment, the reciprocating guide is at least two, each reciprocating guide is arranged along the axis of the reciprocating shaft 121, and at least one moving body 122 is arranged on each reciprocating guide. By arranging at least two reciprocating guides, the stability of the cylinder 110 moved by the moving body 122 can be improved.

[0058] In an embodiment, the moving body 122 can be two, the two moving bodies 122 are arranged uniformly and spaced apart along the axis of the reciprocating shaft 121, and the two moving bodies 122 can move synchronously when moving reciprocally. By moving synchronously, the two moving bodies 122 drive the cylinder 110 to move, the stability of the cylinder 110 moving can be further improved, and the stability of the force received by the cylinder 110 is ensured. In other embodiments, the moving body 122 can also be one. Or the moving body 122 can also be other numbers, and each moving body 122 can move synchronously in the same direction.

[0059] In another embodiment, the reciprocating shaft 121 is further provided with a balance guide rail opposite to the reciprocating guide rail along the axis of the reciprocating shaft 121, the balance guide rail is a closed curve guide rail around the axis of the reciprocating shaft 121, and the peaks and valleys of the balance guide rail are arranged along the axis of the reciprocating shaft 121; the peaks of the balance guide rail are opposite to the valleys of the reciprocating guide rail along the axis direction, and the valleys of the balance guide rail are opposite to the peaks of the reciprocating guide rail along the axis direction. The balance guide rail is provided with a balance body opposite to the moving body 122 along the axis of the reciprocating shaft 121, so that the balance body moves towards or away from the moving body 122 when the reciprocating shaft 121 rotates. By arranging the balance guide rail and the balance body, the bidirectional acceleration of the balance body and the moving body 122 during movement can be offset, and the vibration caused by acceleration can be reduced.

[0060] Specifically, the balance guide rail is consistent with the structure of the reciprocating guide rail, and the balance guide rail is arranged symmetrically along the circumference of the power shaft with respect to the reciprocating guide rail. In this embodiment, the balance body is consistent with the structure of the moving body 122.

[0061] Referring to Figure 4 , Figure 5 and Figure 6 , in an embodiment, the moving cylinder part 114 of the cylinder body 110 is formed with a containing cavity 115, the reciprocating shaft 121 is arranged in the containing cavity 115, and the inner wall of the containing cavity 115 is formed with a limiting groove 116, 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 arranged in the limiting groove 116, and the remaining part is arranged in the reciprocating groove 123. By arranging the reciprocating shaft 121 in the containing cavity 115, the rotation of the reciprocating shaft 121 occurs in the containing cavity 115, and the moving body 122 is limited between the reciprocating groove 123 and the limiting groove 116, which ensures the stability of the limiting of the moving body 122 and the stability of the movement of the moving body 122 driving the cylinder body 110.

[0062] In this embodiment, the containing cavity 115 penetrates the moving cylinder part 114 from the side opposite to the impact cylinder part 113, so that the reciprocating shaft 121 can be arranged in the containing cavity 115 from the side of the moving cylinder part 114 opposite to the impact cylinder part 113.

[0063] In an embodiment, the moving assembly 100 further comprises a rolling limiting piece 130 arranged in the limiting groove 116, and the moving body 122 is a spherical body which is rollably arranged between the rolling limiting piece 130 and the inner wall of the reciprocating groove 123. The rolling limiting piece 130 avoids direct rolling friction between the moving body 122 and the inner wall of the limiting groove 116. Specifically, the rolling limiting piece 130 is formed with a semispherical recess, and the moving body 122 is arranged in the semispherical recess and can roll.

[0064] In an embodiment, the moving cylinder part 114 of the cylinder body 110 comprises a first splicing part 117 and a second splicing part 118. The first splicing part 117 is connected to the impact cylinder part 113. The first splicing part 117 is formed with a first splicing cavity 1172. The inner wall of the first splicing cavity 1172 is formed with a first splicing groove 1174, which is open at a side opposite to the impact cylinder part 113. The second splicing part 118 is formed with a second splicing cavity 1182. The inner wall of the second splicing cavity 1182 is formed with a second splicing groove 1184, which is open at a side of the second splicing part 118. The open side of the second splicing part 118 is butted against the open side of the first splicing part 117, so that the first splicing cavity 1172 and the second splicing cavity 1182 are in corresponding communication to form a containing cavity 115, and the first splicing groove 1174 and the second splicing groove 1184 are in corresponding communication to form a limiting groove 116. Since the moving body 122 is limited in the limiting groove 116, and the reciprocating shaft 121 is arranged in the containing cavity 115, 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 limitation of the moving body 122 in the limiting groove 116.

[0065] In the embodiment, the first splicing part 117 is integrally formed on the impact cylinder part 113.

[0066] In an embodiment, the first splicing part 117 and the second splicing part 118 are welded. In other embodiments, the first splicing part 117 and the second splicing part 118 can also be connected by screws or clamped together.

[0067] In an embodiment, for a single guide structure 112, one 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 to form the guide structure 112. Since the transmission rod 321 is guided by the guide structure 112, by forming part of the guide structure 112 on the first splicing part 117 and the second splicing part 118, the transmission rod 321 can be guided by the first splicing part 117 and the second splicing part 118.

[0068] In other embodiments, the guide structure 112 can be formed on the first splicing part 117 alone or on the second splicing part 118 alone.

[0069] Again refer to Figure 2 In an embodiment, the impact assembly 200 further comprises an impact rod 220, which is located at a side of the impact hammer 210 opposite to the cylinder body 110. The impact hammer 210 can impact the drill bit in the rotating sleeve 310 through the impact rod 220.

[0070] In an embodiment, the electric hammer 10 further comprises a protective shell (not shown in the figure), the moving assembly 100 and the rotating assembly 300 are arranged in the protective shell, and the moving assembly 100 and the rotating assembly 300 are protected by the protective shell. Specifically, a lubricating oil cavity is formed in the protective shell, and the transmission unit 320 and the moving assembly 100 are located in the lubricating oil cavity. Further, the transmission rod 321, the first transmission member 311 and the moving assembly 100 are located in the lubricating oil cavity. By adding lubricating oil in the lubricating oil cavity, the stability of the transmission between the transmission rod 321, the first transmission member 311 and the moving assembly 100 can be ensured, the service life of each component can be improved, and the reciprocating speed and the rotating speed can be increased, and the impact work of the electric hammer 10 can be improved.

[0071] Any combination of the technical features in the above-described embodiments can be made, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0072] The above-described embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

[0073] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "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 the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0074] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0075] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixing" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0077] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

Claims

1. An electric hammer characterized by comprising: The electric hammer comprises: a moving assembly, which comprises a cylinder and a moving unit connected to the cylinder and used for driving the cylinder to move reciprocatingly; an impact assembly, which comprises an impact hammer, the impact hammer is arranged 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 impact hammer and the inner wall of the cylinder, and the impact hammer is movable in the cylinder; and a rotating assembly, which comprises a rotating sleeve, a transmission unit and a driving source, the cylinder is arranged in the rotating sleeve, the impact assembly is arranged in the rotating sleeve, the transmission unit is in transmission connection with the rotating sleeve, and the driving source is used for driving the rotating sleeve to rotate relative to the cylinder through the transmission unit; the transmission unit comprises a transmission rod, 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 in guide cooperation with the transmission rod; the cylinder comprises an impact cylinder part and a moving cylinder part connected with the impact cylinder part, the moving unit is connected with the moving cylinder part, the impact hammer is arranged in the impact cylinder part, the impact cylinder part is arranged in 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; the driving source and the rotating sleeve are located on one side of the opposite two ends of the cylinder respectively, the transmission unit further comprises a second transmission member, one end of the transmission rod is in transmission connection with the second transmission member, and the driving source is used for driving the transmission rod to rotate synchronously through the second transmission member; an output shaft of the driving source is connected with the moving unit, and the second transmission member is sleeved on the output shaft; 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 the wave crest and the wave trough of the curve-shaped guide rail are arranged at intervals along the axis of the reciprocating shaft, and the moving body is limited on the cylinder and is movable on the reciprocating guide rail; the reciprocating guide rail is a reciprocating groove, the reciprocating groove is a closed curve-shaped groove surrounding the axis of the reciprocating shaft, the moving body is arranged in the reciprocating groove and is movable in the reciprocating groove, a containing cavity is formed in the moving cylinder part of the cylinder, the reciprocating shaft is arranged in the containing cavity, and a limiting groove is formed on 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.

2. The hammer drill according to claim 1, characterized in that the transmission unit comprises a first transmission member, one end of the transmission rod is in transmission connection with the rotating sleeve through the first transmission member, and the driving source is used for driving the other end of the transmission rod to rotate.

3. The hammer drill of claim 2, wherein the diameter of the outer wall of the impact cylinder part is consistent with the diameter of the corresponding inner wall of the rotating sleeve.

4. The hammer drill of claim 2, wherein 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 rotating sleeve, and each of the transmission rods is in transmission connection with the rotating sleeve through a first transmission member; the outer wall of the cylinder body is formed with the guide structures corresponding to the number of the transmission rods, and each of the transmission rods is in guiding cooperation with a guide structure.

5. The hammer drill of claim 2, wherein, The driving source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder body to reciprocate along the axis direction of the reciprocating shaft; or the moving assembly further comprises a power source, and the power source is used to drive the reciprocating shaft to rotate, so that the moving body drives the cylinder body to reciprocate along the axis direction of the reciprocating shaft.

6. The hammer drill of claim 5, wherein, The reciprocating shaft is further provided with a balance guide rail which is arranged at intervals opposite to the reciprocating guide rail along the axis of the reciprocating shaft, the balance guide rail is a closed curve guide rail surrounding the axis of the reciprocating shaft, and the crest and the trough of the balance guide rail are arranged at intervals along the axis of the reciprocating shaft; the crest of the balance guide rail is opposite to the trough of the reciprocating guide rail along the axis direction, and the trough of the balance guide rail is opposite to the crest of the reciprocating guide rail along the axis direction; the balance guide rail is provided with a balance body, and the balance body is arranged opposite to the moving body along the axis of the reciprocating shaft; when the reciprocating shaft rotates, the balance body moves towards or away from the moving body.

7. The hammer drill according to any one of claims 1 to 6, characterized in that Further comprising a protective shell, a lubricating oil cavity is formed in the protective shell, and the transmission unit and the moving assembly are located in the lubricating oil cavity.

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