Impact tool

Abstract

The invention discloses an impact tool, the impact tool comprises a machine shell, and a mounting cylinder, a cylinder, an impact component, a linkage mechanism and a transmission mechanism which are accommodated in the machine shell, part of a drill bit extends out of the mounting cylinder to perform hammering action, and the impact component comprises an impact part and an impact power assembly; the linkage mechanism comprises at least one linkage piece, a sliding assembly and an elastic piece, the sliding assembly and the elastic piece are arranged outside the air cylinder in a sleeving mode and driven by the linkage piece, and the transmission mechanism comprises an intermediate shaft arranged on the outer side of the air cylinder in parallel, a clutch sleeve arranged on the intermediate shaft in a sleeving mode and a swing rod bearing. The sliding assembly is connected to the clutch sleeve and drives the clutch sleeve to move so as to transmit or interrupt power input of the middle shaft to the swing rod bearing, and the rotating swing rod bearing drives the impact power assembly to operate so that the impact power assembly can drive the impact piece to impact the drill bit. False triggering is effectively avoided, and the use safety is improved.

Description

Technical Field

[0001] This invention relates to the field of drilling tools, and more particularly to impact tools. Background Technology

[0002] Drilling tools are widely used in construction, decoration, and maintenance, with electric picks, hammer drills, and impact drills being common examples. To maximize battery life, these drilling tools are often designed to not operate when unloaded, thus reducing unnecessary energy consumption.

[0003] Japanese Patent No. JP4568600B2 discloses an impact drill. In this design, a drive motor transmits power to a tool holding guide via a power transmission mechanism. When an impact operation is required, the drill bit is placed against the workpiece, and the drill bit transmits force to a chuck used to hold it. The chuck pushes the tool holding guide connected to it to move. A conversion plate mounted on the tool holding guide moves together with the tool holding guide to apply pressure to a compression coil spring. Simultaneously, the conversion plate drives a clutch cam to approach a rotating body so that the clutch cam engages with the rotating body. This allows the clutch cam, which rotates with the tool holding guide, to transmit rotational force to the rotating body. The rotating body drives a swing plate and a swing cylinder to reciprocate linearly within the tool holding guide. The striking element is driven by the cylinder to strike the drill bit, thereby triggering the drill bit to perform a hammering action.

[0004] In this design, pressing the chuck can also trigger an impact operation, which poses a certain risk of accidental activation, generates unnecessary energy consumption, and has relatively low safety. Summary of the Invention

[0005] To address the aforementioned technical problems and achieve at least one advantage of the present invention, the present invention provides an impact tool, the impact tool comprising a housing and a component housed within the housing:

[0006] An installation cylinder is detachably inserted with a drill bit inside, and part of the drill bit extends out of the installation cylinder to perform a hammering action;

[0007] A cylinder, the cylinder being connected to the rear end of the mounting cylinder;

[0008] An impact member is housed within the cylinder. The impact member includes an impact element and an impact power assembly. The impact element is movably mounted in the cylinder and located between the drill bit and the impact power assembly. The impact power assembly drives the impact element to impact the drill bit.

[0009] The linkage mechanism includes at least one linkage member, a sliding assembly sleeved on the outside of the cylinder and driven by the linkage member, and an elastic member. The side wall of the cylinder has at least one through groove. The linkage member extends into the cylinder through the through groove. When the drill bit abuts against the workpiece, the drill bit pushes the impact member to move. The impact member drives the linkage member to move, so as to transmit the axial movement of the impact member to the sliding assembly. One end of the elastic member is connected to the sliding assembly, and the other end is connected to the cylinder or the housing. The elastic member undergoes elastic deformation when the sliding assembly is driven by the linkage member. The elastic member resets the sliding assembly when the external force applied to the drill bit is removed.

[0010] The transmission mechanism includes an intermediate shaft parallel to the outside of the cylinder, a clutch sleeve sleeved on the intermediate shaft, and a rocker arm bearing. The intermediate shaft can be driven to rotate. Either the intermediate shaft or the rocker arm bearing is separably engaged with the clutch sleeve. A sliding component is connected to the clutch sleeve and drives the clutch sleeve to move in order to transmit or interrupt the power input from the intermediate shaft to the rocker arm bearing. An impact power component is connected to the rocker arm bearing. The rotating rocker arm bearing drives the impact power component to run so that the impact component drives the impact member to impact the drill bit.

[0011] According to an embodiment of the present invention, the sliding assembly includes a sliding body and a driving member. The sliding body and the driving member are slidably sleeved on the outside of the cylinder. The sliding body partially covers the through groove. The driving member is connected to the clutch sleeve. The driving member is disposed behind the sliding body and can be pushed by the sliding body to drive the clutch sleeve to move. The two ends of the elastic member are respectively connected to the driving member and the cylinder.

[0012] According to one embodiment of the present invention, the linkage is slidably mounted in the through groove and engaged with the impact member. The sliding body portion covers the through groove, and the inner wall of the sliding body is provided with a stepped portion protruding toward the through groove. One end of the linkage abuts against the stepped portion. When the drill bit abuts against the workpiece, the drill bit pushes the impact member to drive the linkage to slide in the same direction in the through groove. The linkage pushes the stepped portion to make the sliding body slide in the same direction.

[0013] According to one embodiment of the present invention, the impact member includes an impact rod and a stop portion located between the impact rod and the linkage member. The impact rod is capable of pushing the stop portion to move when it is pushed by the drill bit. The stop portion has a pushing surface inclined in the axial direction at one end away from the impact rod. The sliding body has a pressure-receiving surface inclined in the axial direction. The linkage member is located between the pushing surface and the pressure-receiving surface. With reference to the direction in which the impact member moves when pushed by the drill bit, the distance between the pressure-receiving surface and the outer surface of the cylinder gradually decreases. When the impact member moves when pushed by the drill bit, the linkage member is squeezed by the pushing surface and moves in the through groove in a direction extending from the inside of the cylinder to the through groove. At the same time, the linkage member applies pressure to the pressure-receiving surface to drive the sliding body.

[0014] According to an embodiment of the present invention, the driving member includes a sliding sleeve and a shift fork. The sliding sleeve is slidably sleeved outside the cylinder and connected to the sliding body. The two ends of the elastic member are respectively connected to the sliding sleeve and the cylinder. The shift fork is connected between the sliding sleeve and the clutch sleeve. When the drill bit is subjected to an external force, causing the sliding body to push the sliding sleeve to move, the shift fork drives the clutch sleeve to move.

[0015] According to one embodiment of the present invention, the impact tool further includes an intermediate seat disposed within the housing and used to support the cylinder and the intermediate shaft. The shift fork includes a first mounting portion, a second mounting portion and a third mounting portion, the first mounting portion, the second mounting portion and the third mounting portion being interconnected. The first mounting portion is pivotally connected to the intermediate seat, the second mounting portion is hinged to the sliding sleeve, and the third mounting portion abuts against the clutch sleeve.

[0016] According to one embodiment of the present invention, the clutch sleeve is movably mounted on the rocker arm bearing and is splinedly engaged with the rocker arm bearing. The sliding assembly further includes a reset member, which is sleeved on the intermediate shaft and has its two ends connected to the clutch sleeve and the rocker arm bearing, respectively. The elastic coefficient of the reset member is less than that of the elastic member.

[0017] When the drill bit is not subjected to external force, the sliding sleeve is subjected to the elastic force of the elastic element, and the sliding sleeve applies pressure to the clutch sleeve through the shift fork to keep the reset element compressed;

[0018] When the drill bit is subjected to an external force, causing the sliding body to push the sliding sleeve to move, the elastic element is compressed. The sliding sleeve applies force to the second mounting part to drive the shift fork to rotate, so that the third mounting part moves away from the clutch sleeve. At the same time, the clutch sleeve is subjected to the elastic force of the reset element and moves along the rocker arm bearing to simultaneously engage with the intermediate shaft and the rocker arm bearing spline.

[0019] According to one embodiment of the present invention, the driving member includes a ring portion sleeved on the cylinder and a snap-fit ​​portion extending from the ring portion toward the intermediate shaft. The ring portion is connected to the sliding body. The two ends of the elastic member are respectively connected to the ring portion and the cylinder. The snap-fit ​​portion snaps into the clutch sleeve. The clutch sleeve is movably mounted on the intermediate shaft. The clutch sleeve rotates together with the intermediate shaft. When the drill bit is subjected to an external force, causing the sliding body to push the ring portion and the snap-fit ​​portion to move in the same direction, the elastic member is compressed. The snap-fit ​​portion drives the clutch sleeve to move along the intermediate shaft so that the clutch sleeve simultaneously engages with the rocker arm bearing and the intermediate shaft spline.

[0020] According to one embodiment of the present invention, the cylinder and the mounting cylinder are integrally formed.

[0021] According to one embodiment of the present invention, when the drill bit abuts against the workpiece and pushes towards the impact member, the clutch sleeve moves to a depth greater than the distance by which the clutch sleeve is pushed in the opposite direction by the sliding component when the impact power assembly drives the impact member to impact the drill bit. Attached Figure Description

[0022] Figure 1 A schematic diagram of the impact tool described in this invention is shown.

[0023] Figure 2 A partial structural schematic diagram of an embodiment of the impact tool described in this invention is shown.

[0024] Figure 3 A partial structural schematic diagram of another embodiment of the impact tool described in this invention is shown.

[0025] Figure 4 A partial structural schematic diagram of an embodiment of the impact tool described in this invention before movement is shown.

[0026] Figure 5 A partial structural cross-sectional view of an embodiment of the impact tool described in this invention before movement is shown.

[0027] Figure 6 A partial structural diagram of an embodiment of the impact tool described in this invention after movement is shown.

[0028] Figure 7 A partial cross-sectional view of the impact tool of the present invention after movement is shown.

[0029] Figure 8 A partial structural schematic diagram of another embodiment of the impact tool described in this invention before movement is shown.

[0030] Figure 9 A partial structural cross-sectional view of another embodiment of the impact tool described in this invention before movement is shown.

[0031] Figure 10 A partial structural diagram of another embodiment of the impact tool described in this invention after movement is shown.

[0032] Figure 11 A partial structural cross-sectional view of another embodiment of the impact tool described in this invention after movement is shown. Detailed Implementation

[0033] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0034] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0035] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0036] refer to Figures 1 to 3 An impact tool according to a preferred embodiment of the present invention will be described in detail below. The impact tool includes a housing 10, a mounting cylinder 20, a cylinder 30, an impact member 40, a linkage mechanism 50, and a transmission mechanism 60. The mounting cylinder 20, the cylinder 30, the impact member 40, the linkage mechanism 50, and the transmission mechanism 60 are all housed within the housing 10.

[0037] refer to Figures 2 to 11A drill bit 100 is detachably inserted inside the mounting cylinder 20, with a portion of the drill bit 100 extending out of the mounting cylinder 20 to perform a hammering action. The end of the mounting cylinder 20 where the drill bit 100 is mounted is defined as the front end, and the cylinder 30 is connected to the rear end of the mounting cylinder 20.

[0038] Preferably, the cylinder 30 and the mounting cylinder 20 are integrally formed.

[0039] The impact member 40 is housed within the cylinder 30. The impact member 40 includes an impact element 41 and an impact power assembly 42. The impact element 41 is movably mounted in the cylinder 30 and located between the drill bit 100 and the impact power assembly 42. The impact power assembly 42 drives the impact element 41 to impact the drill bit 100, thereby achieving hammering.

[0040] The cylinder 30 has at least one through groove 301 on its side wall. The linkage mechanism 50 includes at least one linkage member 51 and a sliding assembly 52 disposed outside the cylinder 30 and driven by the linkage member 51. The linkage member 51 extends into the cylinder 30 through the through groove 301. When the drill bit 100 abuts against the workpiece, the drill bit 100 pushes the impact member 41 to move within the cylinder 30. The impact member 41 drives the linkage member 51 to move, thereby transmitting the axial movement of the impact member 41 to the sliding assembly 52. The transmission mechanism 60 includes an intermediate shaft 61 parallel to the outside of the cylinder 30, a clutch sleeve 62 fitted onto the intermediate shaft 61, and a rocker arm bearing 63. The intermediate shaft 61 can be driven to rotate. Either the intermediate shaft 61 or the rocker arm bearing 63 can be detachably engaged with the clutch sleeve 62. The sliding component 52 is connected to the clutch sleeve 62 and drives the clutch sleeve 62 to move, thereby transmitting or interrupting the power input from the intermediate shaft 61 to the rocker arm bearing 63. The impact power component 42 is connected to the rocker arm bearing 63. The rotating rocker arm bearing 63 drives the impact power component 42 to operate, thereby driving the impact member 41 to impact the drill bit 100. In this process, the impact operation is triggered by bringing the drill bit 100 into contact with the workpiece, making the operation convenient. In addition, since the drill bit 100 is designed to be detachable, the impact tool will not be triggered by external forces after the drill bit 100 is detached, reducing unnecessary energy consumption. Compared with the prior art, it effectively avoids false triggering and increases the safety of use.

[0041] It is worth mentioning that the linkage mechanism 50 also includes an elastic element 53. One end of the elastic element 53 is connected to the sliding assembly 52, and the other end is connected to the cylinder 30 or the housing 10. The elastic element 53 undergoes elastic deformation when the sliding assembly 52 is driven by the linkage element 51. When the external force applied to the drill bit 100 is removed, the elastic element 53 resets the sliding assembly 52, so that the sliding assembly 52 drives the impact member 41 and the drill bit 100 to move in the same direction as a whole through the linkage element 51. At the same time, the sliding assembly 52 drives the clutch sleeve 62 to reset so that the rocker arm bearing 63 stops rotating. At this time, the hammering action is suspended to effectively avoid the phenomenon of empty hammer after the work is finished.

[0042] Preferably, the elastic element 53 is implemented as a spring.

[0043] Preferably, the clutch sleeve 62 is slidably sleeved on the surface of one of the intermediate shaft 61 and the rocker arm bearing 63 and is splinedly engaged with the clutch sleeve 62. When the sliding component 52 is driven by the linkage 51, it drives the clutch sleeve 62 to move to engage with the other spline, so that the intermediate shaft 61 drives the rocker arm bearing 63 to rotate through the clutch sleeve 62.

[0044] It is worth mentioning that when the drill bit 100 abuts against the workpiece and pushes towards the impact member 41, the clutch sleeve 62 moves to a depth greater than the distance by which the clutch sleeve 62 is pushed in the opposite direction by the sliding component 52 when the impact power assembly 42 drives the impact member 41 to impact the drill bit 100, so as to ensure that the impact tool can stably perform the hammering action.

[0045] refer to Figures 4 to 7 In one embodiment, the sliding assembly 52 includes a sliding body 521 and a driving member 522. The sliding body 521 and the driving member 522 are slidably sleeved on the outside of the cylinder 30. The sliding body 521 partially covers the through groove 301. The driving member 522 is disposed behind the sliding body 521 and can be pushed by the sliding body 521. The two ends of the elastic member 53 are respectively connected to the driving member 522 and the cylinder 30. The driving member 522 is connected to the clutch sleeve 62. When the drill bit 100 is pushed by an external force to move the impact member 41 into the cylinder 30, the impact member 41 pushes the linkage member 51 to move. The linkage member 51 pushes the driving member 522 through the sliding body 521, so that the driving member 522 drives the clutch sleeve 62 to move, so that the clutch sleeve 62 simultaneously engages with the intermediate shaft 61 and the rocker arm bearing 63.

[0046] refer to Figures 4 to 7 In one embodiment, the linkage 51 is slidably mounted in the through groove 301 and engaged with the impact member 41. The sliding body 521 partially covers the through groove 301, and the inner wall of the sliding body 521 is provided with a stepped portion 5211 protruding towards the through groove 301. One end of the linkage 51 abuts against the stepped portion 5211. When the drill bit 100 abuts against the workpiece, the drill bit 100 pushes the impact member 41 to drive the linkage 51 to slide in the same direction within the through groove 301. The linkage 51 pushes the stepped portion 5211 to make the sliding body 521 slide in the same direction.

[0047] refer to Figures 8 to 11 In another embodiment, the impact member 41 includes an impact rod 411 and a stop portion 412 located between the impact rod 411 and the linkage member 51. The impact rod 411 is capable of pushing the stop portion 412 to move when it is pushed by the drill bit 100. The stop portion 412 has a pushing surface 41201 inclined in the axial direction at one end opposite to the impact rod 411. The sliding body 521 has a pressure-receiving surface 52101 inclined in the axial direction. The linkage member 51 is located between the pushing surface 41201 and the pressure-receiving surface 52101. Taking the direction in which the impact member 41 moves as pushed by the drill bit 100 as a reference, the distance between the pressure-receiving surface 52101 and the outer surface of the cylinder 30 gradually decreases. When the impact member 41 is pushed and moved by the drill bit 100, the linkage member 51 is squeezed by the pressing surface 41201 and moves in the through groove 301 in the direction extending from the cylinder 30 to the through groove 301. At the same time, the linkage member 51 applies pressure to the pressure surface 52101 to drive the sliding body 521.

[0048] In one embodiment, the driving member 522 includes a sliding sleeve 5221A and a shift fork 5222A. The sliding sleeve 5221A is slidably sleeved outside the cylinder 30 and connected to the sliding body 521. The two ends of the elastic member 53 are respectively connected to the sliding sleeve 5221A and the cylinder 30. The shift fork 5222A is connected between the sliding sleeve 5221A and the clutch sleeve 62. When the drill bit 100 is subjected to an external force, causing the sliding body 521 to push the sliding sleeve 5221A to move, the shift fork 5222A drives the clutch sleeve 62 to move, so that the clutch sleeve 62 simultaneously engages with the intermediate shaft 61 and the rocker arm bearing 63.

[0049] Furthermore, the impact tool also includes an intermediate seat 70 disposed within the housing 10 and used to support the cylinder 30 and the intermediate shaft 61. The shift fork 5222A includes a first mounting portion 52221A, a second mounting portion 52222A, and a third mounting portion 52223A. The first mounting portion 52221A, the second mounting portion 52222A, and the third mounting portion 52223A are interconnected. The first mounting portion 52221A is pivotally connected to the intermediate seat 70. The second mounting portion 52222A is hinged to the sliding sleeve 5221A. The third mounting portion 52223A abuts against the clutch sleeve 62.

[0050] The clutch sleeve 62 is movably mounted on the rocker arm bearing 63 and splinedly engaged with the rocker arm bearing 63. The sliding assembly 52 further includes a reset member 523A, which is sleeved on the intermediate shaft 61 and its two ends are respectively connected to the clutch sleeve 62 and the rocker arm bearing 63. The elastic coefficient of the reset member 523A is less than that of the elastic member 53. When the drill bit 100 is not subjected to external force, the sliding sleeve 5221A is subjected to the elastic force of the elastic element 53. The sliding sleeve 5221A applies pressure to the clutch sleeve 62 through the shift fork 5222A to keep the reset element 523A compressed. When the drill bit 100 is subjected to external force, causing the sliding body 521 to push the sliding sleeve 5221A to move, the elastic element 53 is compressed. The sliding sleeve 5221A applies force to the second mounting part 52222A to drive the shift fork 5222A to rotate, so that the third mounting part 52223A moves away from the clutch sleeve 62. At the same time, the clutch sleeve 62 is subjected to the elastic force of the reset element 523A and moves along the rocker arm bearing 63 to simultaneously engage with the intermediate shaft 61 and the rocker arm bearing 63 spline. At this time, the intermediate shaft 61 drives the rocker arm bearing 63 to rotate through the clutch sleeve 62.

[0051] Preferably, the reset member 523A is implemented as a spring.

[0052] refer to Figures 8 to 11In another embodiment, the driving member 522 includes a ring portion 5221B disposed on the cylinder 30 and a snap-fit ​​portion 5222B extending from the ring portion 5221B toward the intermediate shaft 61. The ring portion 5221B is connected to the sliding body 521. The two ends of the elastic member 53 are respectively connected to the ring portion 5221B and the cylinder 30. The snap-fit ​​portion 5222B snaps into the clutch sleeve 62. The clutch sleeve 62 is movably mounted on the intermediate shaft 61 and rotates together with the intermediate shaft 61. When the drill bit 100 is subjected to an external force, causing the sliding body 521 to push the ring portion 5221B and the locking portion 5222B to move in the same direction, the elastic element 53 is compressed, and the locking portion 5222B drives the clutch sleeve 62 to move along the intermediate shaft 61 so that the clutch sleeve 62 simultaneously engages with the rocker arm bearing 63 and the intermediate shaft 61 via splines. At this time, the intermediate shaft 61 drives the rocker arm bearing 63 to rotate through the clutch sleeve 62.

[0053] refer to Figures 4 to 11 Furthermore, the impact power assembly 42 includes an impact power member 421 and a connecting member 422. The impact power member 421 is movably mounted within the cylinder 30 and located on the side of the impact member 41 away from the drill bit 100. The connecting member 422 is rotatably mounted to the impact power member 421. The connecting member 422 has a slot 42201, and one end of the rocker arm bearing 63 is inserted into the slot 42201 and is configured to move along the slot 42201. When the rocker arm bearing 63 rotates, the rocker arm bearing 63 pushes and pulls the connecting member 422 to drive the impact power member 421 to reciprocate within the cylinder 30. The impact member 41 is impacted by the impact power assembly 42 to drive the drill bit 100 to perform a hammering action.

[0054] The impact power component 421 includes a piston 4211 and a hammer 4212. A connecting member 422 is rotatably mounted on the piston 4211. The rocker arm bearing 63 drives the piston 4211 to reciprocate within the cylinder 30 via the connecting member 422. The piston 4211 has a movable chamber 421101. The hammer 4212 is movably and sealed within the movable chamber 421101 and corresponds to the impact component 41. The portion of the movable chamber 421101 located away from the impact component 41 contains compressed gas. When the piston 4211 reciprocates within the cylinder 30, the hammer 4212 is pushed and pulled by the compressed gas, reciprocating within the movable chamber 421101 to impact the drill bit 100, which is being processed, by pushing the impact component 41.

[0055] refer to Figures 2 to 11 The impact tool also includes a drilling transmission assembly 80. The cylinder 30 is mounted on the drilling transmission assembly 80 and can be driven to rotate by the drilling transmission assembly 80. The mounting cylinder 20 can rotate together with the cylinder 30, so that the drill bit 100 inserted into the mounting cylinder 20 can drill. In addition, the drill bit 100 can rotate on its own axis while reciprocating to perform a drill hammer operation.

[0056] Furthermore, the drilling transmission assembly 80 includes a drive gear 81 and a transmission gear 82. The drive gear 81 is mounted on the cylinder 30, and the transmission gear 82 is mounted on the intermediate shaft 61, with the drive gear 81 meshing with the transmission gear 82. The rotating intermediate shaft 61 drives the cylinder 30 to rotate through the interaction of the transmission gear 82 and the drive gear 81.

[0057] In one example, the linkage 51 and the clutch sleeve 62 are located on both sides of the rotating gear 81, and the sliding body 521, which is sleeved outside the cylinder 30, passes through the rotating gear 81 to connect with the driving member 522, so as to make the overall structure compact and minimize the overall volume as much as possible.

[0058] The impact tool also includes a drive mechanism 90, which is arranged parallel to the intermediate shaft 61 and is configured to drive the intermediate shaft 61 to rotate.

[0059] Preferably, the drive mechanism 90 is implemented as including, but not limited to, a motor, gears, etc.

[0060] This application also proposes a method for operating an impact tool, including the following steps:

[0061] When the drill bit 100 abuts against the workpiece, the drill bit 100 is pushed against the workpiece and pushed to move the impact member 41 into the cylinder 30. The impact member 41 drives the linkage member 51 to move together to transmit the axial movement of the impact member 41 to the sliding assembly 52. ​​At the same time, the elastic member 53 undergoes elastic deformation. The sliding assembly 52 drives the clutch sleeve 62 to move to transmit the power input from the intermediate shaft 61 to the rocker arm bearing 63. The rotating intermediate shaft 61 drives the rocker arm bearing 63 to rotate through the clutch sleeve 62. The rotating rocker arm bearing 63 drives the impact power assembly 42 to run so that the impact member 41 is driven by the impact power assembly 42 to impact the drill bit 100, so that the drill bit 100 performs a hammering action.

[0062] When the drill bit 100 is not in contact with the workpiece, the sliding component 52 is reset under the elastic action of the elastic element 53 and drives the linkage element 51, the impact element 41 and the drill bit 100 to reset together. At the same time, the sliding component 52 drives the clutch sleeve 62 to reset so that the rocker arm bearing 63 stops rotating. At this time, the hammering action is suspended.

[0063] In one embodiment, the method of operating the impact tool includes the following steps:

[0064] When the impact member 41 is pushed by the drill bit 100, the impact member 41 drives the linkage member 51 to slide in the same direction within the through groove 301, and the linkage member 51 pushes the step portion 5211 to make the sliding component 52 slide in the same direction.

[0065] In another embodiment, the method of operating the impact tool includes the following steps:

[0066] When the impact member 41 is pushed and moved by the drill bit 100, the linkage member 51 is squeezed by the pressing surface 41201 and moves in the through groove 301 in the direction extending from the cylinder 30 to the through groove 301. At the same time, the linkage member 51 applies pressure to the pressure surface 52101 to drive the sliding component 52.

[0067] In one embodiment, the method of operating the impact tool includes the following steps:

[0068] When the impact member 41, which is moved by the drill bit 100, pushes the sliding body 521 to move in the same direction through the linkage member 51, the elastic member 53 is compressed. The moving sliding body 521 drives the shift fork 5222A to rotate through the sliding sleeve 5221A, so that the third mounting part 52223A moves away from the clutch sleeve 62. At the same time, the clutch sleeve 62 is subjected to the elastic force of the compressed reset member 523A and moves along the rocker arm bearing 63 to simultaneously engage with the intermediate shaft 61 and the rocker arm bearing 63 spline. At this time, the intermediate shaft 61 drives the rocker arm bearing 63 to rotate through the clutch sleeve 62.

[0069] In another embodiment, the method of operating the impact tool includes the following steps:

[0070] When the impact member 41, which is moved by the drill bit 100, pushes the sliding body 521 to move in the same direction through the linkage member 51, the elastic member 53 is compressed. The ring portion 5221B is pushed by the sliding body 521 and drives the clutch sleeve 62 to move along the intermediate shaft 61 through the snap-fit ​​portion 5222B so that the clutch sleeve 62 simultaneously engages with the rocker arm bearing 63 and the intermediate shaft 61 in a splined manner. At this time, the intermediate shaft 61 drives the rocker arm bearing 63 to rotate through the clutch sleeve 62.

[0071] Preferably, the method of operating the impact tool includes the following steps:

[0072] When the rocker arm bearing 63 rotates, the rocker arm bearing 63 pushes and pulls the connecting member 422 to drive the impact power member 421 to reciprocate within the cylinder 30. The impact member 41 is pushed by the impact power member 421 and impacts and abuts against the drill bit 100 of the workpiece, so that the drill bit 100 performs a hammering action.

[0073] Preferably, the method of operating the impact tool includes the following steps:

[0074] When the piston 4211 reciprocates within the cylinder 30, the compressed gas in the portion of the movable chamber 421101 located on the side of the hammer 4212 away from the impact member 41 pushes and pulls the hammer 4212 to reciprocate within the movable chamber 421101 so as to impact the drill bit 100 against the workpiece by pushing the impact member 41.

[0075] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. An impact tool, characterized in that, The impact tool includes a housing and a cavity housed within the housing: An installation cylinder is detachably inserted with a drill bit inside, and part of the drill bit extends out of the installation cylinder to perform a hammering action. The end of the installation cylinder in which the drill bit is installed is defined as the front end. A cylinder, the cylinder being connected to the rear end of the mounting cylinder; An impact member is housed within the cylinder. The impact member includes an impact element and an impact power assembly. The impact element is movably mounted in the cylinder and located between the drill bit and the impact power assembly. The impact power assembly drives the impact element to impact the drill bit. The linkage mechanism includes at least one linkage member, a sliding assembly sleeved on the outside of the cylinder and driven by the linkage member, and an elastic member. The side wall of the cylinder has at least one through groove. The linkage member extends into the cylinder through the through groove. When the drill bit abuts against the workpiece, the drill bit pushes the impact member to move. The impact member drives the linkage member to move, so as to transmit the axial movement of the impact member to the sliding assembly. One end of the elastic member is connected to the sliding assembly, and the other end is connected to the cylinder or the housing. The elastic member undergoes elastic deformation when the sliding assembly is driven by the linkage member. The elastic member resets the sliding assembly when the external force applied to the drill bit is removed. The transmission mechanism includes an intermediate shaft parallel to the outside of the cylinder, a clutch sleeve sleeved on the intermediate shaft, and a rocker arm bearing. The intermediate shaft can be driven to rotate. Either the intermediate shaft or the rocker arm bearing is detachably engaged with the clutch sleeve. A sliding component is connected to the clutch sleeve and drives the clutch sleeve to move to transmit or interrupt the power input from the intermediate shaft to the rocker arm bearing. An impact power component is connected to the rocker arm bearing. The rotating rocker arm bearing drives the impact power component to run. The impact power component drives the impact element to impact the drill bit.

2. The impact tool according to claim 1, characterized in that, The sliding assembly includes a sliding body and a driving member. The sliding body and the driving member are slidably sleeved on the outside of the cylinder. The sliding body partially covers the through groove. The driving member is connected to the clutch sleeve. The driving member is located behind the sliding body and can be pushed by the sliding body to drive the clutch sleeve to move. The two ends of the elastic member are respectively connected to the driving member and the cylinder.

3. The impact tool according to claim 2, characterized in that, The linkage is slidably mounted in the through groove and engaged with the impact member. The sliding body part covers the through groove, and the inner wall of the sliding body is provided with a stepped portion protruding towards the through groove. One end of the linkage abuts against the stepped portion. When the drill bit abuts against the workpiece, the drill bit pushes the impact member to drive the linkage to slide in the same direction in the through groove. The linkage pushes the stepped portion to make the sliding body slide in the same direction.

4. The impact tool according to claim 2, characterized in that, The impact member includes an impact rod and a stop portion located between the impact rod and the linkage member. The impact rod can push the stop portion to move when it is pushed by the drill bit. The stop portion has a pushing surface inclined in the axial direction at one end away from the impact rod. The sliding body has a pressure-receiving surface inclined in the axial direction. The linkage member is located between the pushing surface and the pressure-receiving surface. With reference to the direction in which the impact member moves when pushed by the drill bit, the distance between the pressure-receiving surface and the outer surface of the cylinder gradually decreases. When the impact member moves when pushed by the drill bit, the linkage member is squeezed by the pushing surface and moves in the through groove in the direction extending from the inside of the cylinder to the through groove. At the same time, the linkage member applies pressure to the pressure-receiving surface to drive the sliding body.

5. The impact tool according to claim 3 or 4, characterized in that, The driving component includes a sliding sleeve and a shift fork. The sliding sleeve is slidably sleeved outside the cylinder and connected to the sliding body. The two ends of the elastic element are respectively connected to the sliding sleeve and the cylinder. The shift fork is connected between the sliding sleeve and the clutch sleeve. When the drill bit is subjected to an external force, causing the sliding body to push the sliding sleeve to move, the shift fork drives the clutch sleeve to move.

6. The impact tool according to claim 5, characterized in that, The impact tool also includes an intermediate seat disposed inside the housing for supporting the cylinder and the intermediate shaft. The shift fork includes a first mounting part, a second mounting part, and a third mounting part, which are interconnected. The first mounting part is pivotally connected to the intermediate seat, the second mounting part is hinged to the sliding sleeve, and the third mounting part abuts against the clutch sleeve.

7. The impact tool according to claim 6, characterized in that, The clutch sleeve is movably mounted on the rocker arm bearing and is splinedly engaged with the rocker arm bearing. The sliding assembly also includes a reset member, which is sleeved on the intermediate shaft and has its two ends connected to the clutch sleeve and the rocker arm bearing, respectively. The elastic coefficient of the reset member is less than that of the elastic member. When the drill bit is not subjected to external force, the sliding sleeve is subjected to the elastic force of the elastic element, and the sliding sleeve applies pressure to the clutch sleeve through the shift fork to keep the reset element compressed; When the drill bit is subjected to an external force, causing the sliding body to push the sliding sleeve to move, the elastic element is compressed. The sliding sleeve applies force to the second mounting part to drive the shift fork to rotate, so that the third mounting part moves away from the clutch sleeve. At the same time, the clutch sleeve is subjected to the elastic force of the reset element and moves along the rocker arm bearing to simultaneously engage with the intermediate shaft and the rocker arm bearing spline.

8. The impact tool according to claim 3 or 4, characterized in that, The driving component includes a ring portion sleeved on the cylinder and a snap-fit ​​portion extending from the ring portion toward the intermediate shaft. The ring portion is connected to the sliding body. The two ends of the elastic element are respectively connected to the ring portion and the cylinder. The snap-fit ​​portion snaps into the clutch sleeve. The clutch sleeve is movably mounted on the intermediate shaft. The clutch sleeve rotates together with the intermediate shaft. When the drill bit is subjected to an external force, causing the sliding body to push the ring portion and the snap-fit ​​portion to move in the same direction, the elastic element is compressed. The snap-fit ​​portion drives the clutch sleeve to move along the intermediate shaft so that the clutch sleeve simultaneously engages with the rocker arm bearing and the intermediate shaft spline.

9. The impact tool according to claim 1, characterized in that, The cylinder and the mounting cylinder are integrally formed.

10. The impact tool according to claim 1, characterized in that, The clutch sleeve moves to a depth greater than the distance by which it engages with the intermediate shaft or the rocker arm bearing when the drill bit abuts against the workpiece and is pushed toward the impact member by the sliding component when the impact power assembly drives the impact member to impact the drill bit.

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