Impact tool with interchangeable handle structure

Abstract

An impact tool with interchangeable handle structure is formed with a connecting portion at the rear end of the impact tool body, the top and bottom surfaces of the connecting portion each having a lug, the rear end surface of the connecting portion having a rear ring body, the top and bottom sides of the rear ring body each extending a through portion, a housing having its left and right halves covering the two lugs and the rear ring body at the front end thereof, a fixing member penetrating the arm housing formed by each lug and the housing and the rear ring housing formed by each through portion and the rear ring body of the housing, and a handle with a trigger connected to the rear ring housing; since the impact tool body is detachably assembled with the handle device through the connecting portion, and the two can be distinguished as independent structures, different types of handle devices can be selectively assembled to the impact tool body, thereby flexibly producing different types of impact tools and reducing the cost of production and manufacturing.

Description

Technical Field

[0001] This invention relates to the construction of an impact tool; more particularly to an impact tool with an interchangeable grip structure. Background Technology

[0002] Existing impact tools, such as impact drills or impact screwdrivers, have a handle directly connected to the rear of the body, with a trigger located at the front of the handle. Pressing the trigger activates a motor inside the body, which drives the impact mechanism at the front via a reduction gear. The output head at the front of the impact mechanism connects to a socket or, via an adapter, to a drill bit.

[0003] While the existing impact tools can be used for screw fastening or drilling, the handle and body are integrated into one piece. Therefore, when the gun-shaped impact tool is designed with a short or long size, it requires two different sets of molds and materials to be manufactured. The non-shared design results in higher manufacturing costs and requires more materials. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an impact tool, which, through a detachable assembly structure between the body and the handle of the impact tool, allows different types of handles to be installed on the same impact tool body, enabling flexible production of different types of impact tools and reducing manufacturing costs.

[0005] To achieve the above objectives, the present invention provides an impact tool with an interchangeable grip structure, comprising an impact tool body and a grip device. The impact tool body has a housing, within which an impact mechanism, a reducer, and a motor are sequentially connected from front to back. The front end of the impact mechanism is connected to an output head, which extends forward through the housing. A connecting portion is formed at the rear end of the housing. The connecting portion has an upper lug and a lower lug at the center of its top and bottom surfaces, respectively. The upper lug has an upper through hole, and the lower lug has a lower through hole. A rear ring body is provided at the rear end face of the connecting portion. A through portion extends upward and downward from the center of the top and bottom sides of the rear ring body, respectively, and each through portion has a rear through hole.

[0006] The grip device has an upper arm shell, a lower arm shell, and a rear ring shell, with the rear ring shell connected between the upper arm shell and the lower arm shell. The upper arm shell, lower arm shell, and rear ring shell are divided into a left shell and a right shell that fit together. The rear ring shell is connected to a grip, and a trigger element electrically connected to control the motor is provided on the grip. The upper arm shell covers the top side of the connecting part and the upper lug. The upper arm shell has two upper fixing cylinders inside, which abut against the left and right sides of the upper lug. The lower arm shell covers the bottom side of the connecting part and the lower lug. The lower arm shell has two lower fixing cylinders inside, which abut against the left and right sides of the lower lug. The rear ring shell accommodates the rear ring body and two through parts. The rear ring shell has two pairs of rear fixing cylinders inside, each pair of rear fixing cylinders abutting against the left and right sides of each through part. A fixing member is inserted and connected between the two upper fixing cylinders and the upper through hole, between the two lower fixing cylinders and the lower through hole, and between each pair of rear fixing cylinders and each rear through hole.

[0007] The advantage of this invention is that the front end of the grip device is detachably assembled to the connecting part of the impact tool body, and the assembly method is to align the left and right halves of the front end of the grip device with the upper lug, lower lug and two through parts of the connecting part, with the upper lug, lower lug and two through parts as the support points for fixing, and with the upper arm shell and lower arm shell abutting against the surface of the connecting part, so that the grip device can be reliably assembled and connected to the connecting part of the impact tool body.

[0008] Since the impact tool body and the grip device are devices that can be manufactured independently, different types of grip devices can be assembled onto the impact tool body with the same structure to become different types of impact tools. Therefore, the impact tool body can be shared during manufacturing, which can save the number of materials and molds. Different impact tools can be assembled according to needs, which can flexibly produce and reduce production costs. Attached Figure Description

[0009] Figure 1 This is a perspective view of the first preferred embodiment of the present invention.

[0010] Figure 2 This is an exploded view of the left casing of the first preferred embodiment of the present invention.

[0011] Figure 3 This is an exploded view of the grip device according to the first preferred embodiment of the present invention.

[0012] Figure 4 This is a front view of the first preferred embodiment of the present invention.

[0013] Figure 5 for Figure 4A sectional view along the 5-5 direction.

[0014] Figure 6 This is a side view of the first preferred embodiment of the present invention.

[0015] Figure 7A for Figure 6 A sectional view along the 7A-7A direction.

[0016] Figure 7B for Figure 6 A sectional view along the 7B-7B direction.

[0017] Figure 7C for Figure 6 A sectional view along the 7C-7C direction.

[0018] Figure 8 This is a perspective view of the second preferred embodiment of the present invention.

[0019] Figure 9 This is an exploded view of the left casing of the second preferred embodiment of the present invention.

[0020] Figure 10 This is an exploded view of the grip device according to the second preferred embodiment of the present invention. Detailed Implementation

[0021] To more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1 to 5 As shown, the impact tool 100 with an interchangeable grip structure according to the first preferred embodiment of the present invention includes an impact tool body 10 and a grip device 20 detachably coupled to the impact tool body 10. The grip device 20 is divided into a gun-type and a bend-free type. By selectively installing the gun-type or bend-free grip device 20 to the rear end of the impact tool body 10, an impact tool 100 with an interchangeable grip structure in either the gun-type or bend-free type can be formed; the grip device 20 of the first preferred embodiment of the present invention is gun-type.

[0022] The impact tool body 10 has a housing 12, within which an impact mechanism 14, a reducer 15, and a motor 16 are sequentially connected from front to back. The front end of the impact mechanism 14 is connected to an output head 141, which extends forward through the housing 12. The rear end of the housing 12 forms a connecting part 13, the top and bottom surfaces of which are arc-shaped. In other preferred embodiments, the top and bottom surfaces of the connecting part 13 may also be planes.

[0023] The connecting part 13 has an upper lug 131 and a lower lug 132 at the center of its top and bottom surfaces, respectively. The upper lug 131 has an upper through hole 1311, and the lower lug 132 has a lower through hole 1321. The aforementioned upper through hole 1311 and lower through hole 1321 are both horizontally extending through holes. The rear end face of the connecting part 13 is a vertical surface and has a rear ring body 133 protruding rearward in the middle. The center of the rear ring body 133 is concentric with the axis of the impact tool body 10. A through part 134 extends upward from the middle of the top side of the rear ring body 133, and another through part 134 extends downward from the middle of the bottom side of the rear ring body 133. Each of these two through parts 134 has a rear through hole 1341, and each rear through hole 1341 is a horizontally extending through hole.

[0024] The grip device 20 includes a left housing A1 and a right housing A2 that are joined together. The housing A formed by the merging of the left housing A1 and the right housing A2 has an upper arm housing 22, a lower arm housing 24, and a rear ring housing 26. The left and right halves of the upper arm housing 22, the lower arm housing 24, and the rear ring housing 26 are respectively divided into the left housing A1 and the right housing A2. The rear ring housing 26 is connected between the rear end of the upper arm housing 22 and the rear end of the lower arm housing 24. A grip 28 is connected to the rear of the rear ring housing 26. A trigger element 281 electrically connected to the grip 28 is provided to control the motor 16. Pressing the trigger element 281 causes the motor 16 to drive the reducer 15 and the impact mechanism 14, thereby causing the output head 141 at the front end to rotate.

[0025] The upper arm shell 22 is a shell with an opening at the bottom and covers the top side of the connecting part 13 and the upper lug 131. The upper arm shell 22 has two upper fixing cylinders 221 inside, which are respectively located in the left shell A1 and the right shell A2. The two upper fixing cylinders 221 abut against the left and right sides of the upper lug 131. The lower arm shell 24 is a shell with an opening at the top and covers the bottom side of the connecting part 13 and the lower lug 132. The lower arm shell 24 has two lower fixing cylinders 241 inside, which are respectively located in the left shell A1 and the right shell A2. The two lower fixing cylinders 241 abut against the left and right sides of the lower lug 132.

[0026] The rear annular shell 26 is a shell with an opening at the front, and its interior is used to accommodate the rear annular body 133 and two through-holes 134. The rear annular shell 26 has two pairs of rear fixing cylinders 261, each pair of which is located within the left shell A1 and the other within the left shell A1. Each pair of rear fixing cylinders 261 abuts against the left and right sides of each through-hole 134. A fastener B is inserted and connected between the two upper fixing cylinders 221 and the upper through-hole 1311, between the two lower fixing cylinders 241 and the lower through-hole 1321, and between each pair of rear fixing cylinders 261 and each rear through-hole 1341. In this preferred embodiment, each fastener B is a bolt and nut assembly.

[0027] In the first preferred embodiment of the present invention, a gun-shaped grip device 20 is combined with the connecting portion 13 of the impact tool body 10 to form a gun-shaped impact tool. When the gun-shaped impact tool 100 with an interchangeable grip structure is used, as... Figure 1 , Figure 2 As shown, the handle 28 is held by hand, and the output head 141 at the front end of the impact tool body 10 is connected to the sleeve. The output head 141 drives the sleeve to lock the nut or other fasteners located nearby.

[0028] This invention benefits from the structure in which the grip device 20 can be screwed onto the connecting part 13 with its left and right front halves (including the upper arm shell 22, the lower arm shell 24, and the rear ring shell 26). The front ends of the grip device 20 are detachably assembled to the connecting part 13 of the impact tool body 10. The upper lug 131, lower lug 132, and two through-holes 134 on both sides of the top and bottom of the rear ring shell 133 serve as support points when the grip device 20 and the impact tool body 10 are screwed together, ensuring a secure connection. Different types of grip devices 20 can share the same impact tool body 10 structure to be assembled into different impact tools such as gun-type or bend-free types. Thus, when the type of grip 28 changes, only the structure of the rear half of the grip device 20 related to the grip 28 needs to be changed, without redesigning the front impact tool body 10. Therefore, the number of materials and molds can be saved during manufacturing. The type of grip device 20 can be flexibly assembled into the impact tool body 10 according to the needs, reducing production costs.

[0029] The following further describes other constructions of the first preferred embodiment described above. Please refer to... Figure 2 , Figure 3 and Figures 6 to 7CAs shown, the upper lug 131 is connected to the rear end of the top surface of the connecting part 13, and the lower lug 132 is connected to the middle of the bottom surface of the connecting part 13. The front-to-back position of the lower lug 132 is further forward than that of the upper lug 131. An upper recess 1312 is formed on the periphery of each end of the upper through hole 1311, and the inner ends of the two upper fixing cylinders 221 are respectively embedded in the upper recess 1312 for positioning. A lower recess 1322 is formed on the periphery of each end of the lower through hole 1321, and the inner ends of the two lower fixing cylinders 241 are respectively embedded in the lower recess 1322 for positioning. Thus, when the multiple fixing members B pass through the left housing A1 and the right housing A2 respectively, the upper arm housing 22 and lower arm housing 24 of the grip device 20 are screwed and locked to the left and right sides of the upper lug 131 and the lower lug 132, making the connection more stable.

[0030] The bottom edge of the upper arm shell 22 and the top edge of the lower arm shell 24 abut against the top and bottom surfaces of the connecting portion 13, respectively. The contour shapes of the left and right sides of the rear ring shell 26 are the same as the contour shapes of the left and right sides of the rear ring body 133 and the two through portions 134. This makes the left and right sides of the rear ring body 133 and the two through portions 134 adjacent to the inner wall surfaces of the left and right sides of the rear ring shell 26. The rear ring shell 26 has a rear plate portion 262, which is located directly behind the rear ring body 133. The rear plate portion 262 is positioned against the rear of the rear ring body 133 and the two through portions 134, increasing the contact area between the grip device 20 and the connecting portion 13 and thereby improving the stability of the joint structure.

[0031] The top and bottom sides of the rear ring shell 26 each extend rearward by a connecting shell 21. In this preferred embodiment, the grip 28 is a vertical shell. The top and bottom of the grip 28 are respectively connected to the rear ends of the two connecting shells 21. The trigger element 281 passes through the top side in front of the grip 28. The upper arm shell 22, lower arm shell 24, rear ring shell 26, two connecting shells 21, and grip 28 are connected to form the shell A. The left and right halves of the shell A are divided into a left shell A1 and a right shell A2. The left half of the upper arm shell 22, lower arm shell 24, rear ring shell 26, two connecting shells 21, and grip 28 forms the left shell A1. The right half of the upper arm shell 22, lower arm shell 24, rear ring shell 26, two connecting shells 21, and grip 28 forms the right shell A2. To ensure that the rear half of the left housing A1 and the right housing A2 are fixed in place after they are joined together to form housing A, several fasteners B are provided that pass through the top, middle and bottom left and right sides of the handle 28 to tightly screw together the rear half of the left housing A1 and the right housing A2.

[0032] A control circuit chamber 23 is formed together in the bottom side of the upper arm shell 22, the rear ring shell 26, and the lower connecting shell 21. A control main board 231 is installed in the control circuit chamber 23. The motor 16 and the trigger element 281 are electrically connected to the control main board 231, so that when the trigger element 281 is pressed, the motor 16 can be started through the control main board 231. A panel opening 25 is provided on the top surface of the lower connecting shell 21. A status display panel 251 is embedded in the panel opening 25. The status display panel 251 is electrically connected to the control main board 231 and is used to display the values ​​of power, torque, and other statuses.

[0033] The grip device 20 of the present invention can be a gun-shaped grip device 20, or a grip device 20 that eliminates the need to bend over. Please see below. Figures 8 to 10 The second preferred embodiment of the present invention shown has the same structure as the impact tool body 10 in the first preferred embodiment, and the front end of the grip device 20 is detachably connected to the impact tool body 10 in the same manner. The main difference between the second preferred embodiment and the first preferred embodiment is that in the second preferred embodiment, the grip 28 of the grip device 20 has an extension rod, and the grip 28 is not integrally formed with the housing A.

[0034] In a second preferred embodiment, the grip device 20 also includes a left housing A1 and a right housing A2 that are joined together. The housing A formed by the merging of the left housing A1 and the right housing A2 has an upper arm housing 22, a lower arm housing 24, and a rear ring housing 26. The rear ring housing 26 is connected between the rear end of the upper arm housing 22 and the rear end of the lower arm housing 24. A limiting plate 263 is provided on the top and bottom sides of the rear ring housing 26. A retaining shell 27 extends rearward from the rear ring housing 26, and a retaining groove 271 extending in the front-rear direction is formed in the retaining shell 27. The left half of the upper arm housing 22, the lower arm housing 24, the rear ring housing 26, and the retaining shell 27 forms the left housing A1, and the right half of the upper arm housing 22, the lower arm housing 24, the rear ring housing 26, and the retaining shell 27 forms the right housing A2.

[0035] The upper arm shell 22 is a shell with an opening at the bottom, covering the top side of the connecting part 13 and the upper lug 131. The upper arm shell 22 has two upper fixing cylinders 221, which are respectively located in the left shell A1 and the right shell A2. The two upper fixing cylinders 221 are embedded in the two upper recesses 1312 and abut against the left and right sides of the upper lug 131. The lower arm shell 24 is a shell with an opening at the top, covering the bottom side of the connecting part 13 and the lower lug 132. The lower arm shell 24 has two lower fixing cylinders 241, which are respectively located in the left shell A1 and the right shell A2. The two lower fixing cylinders 241 are embedded in the two lower recesses 1322 and abut against the left and right sides of the lower lug 132.

[0036] The rear annular shell 26 is a shell with an opening at the front. The contour shapes of the left and right sides of the rear annular shell 26 are the same as the contour shapes of the left and right sides of the rear annular body 133 and the two through-holes 134, and the interior is used to accommodate the rear annular body 133 and the two through-holes 134. The rear annular shell 26 has two pairs of rear fixing cylinders 261, each pair of rear fixing cylinders 261 being respectively disposed in the left shell A1 and the left shell A1, and each pair of rear fixing cylinders 261 abutting against the left and right sides of each through-hole 134. The two limiting plates 263 are respectively positioned against the top surface of the upper through-hole 134 and the bottom surface of the lower through-hole 134. Several pairs of assembly fixing cylinders 272 are provided on the top and bottom sides of the sleeve shell 27, each pair of assembly fixing cylinders 272 being respectively disposed in the left shell A1 and the left shell A1.

[0037] A control circuit chamber 23 is formed together inside the bottom sides of the lower arm shell 24, the rear ring shell 26, and the bundle shell 27. A control main board 231 is disposed inside the control circuit chamber 23, and the motor 16 of the impact tool body 10 is electrically connected to the control main board 231. A fastener B is respectively inserted and connected between the two upper fixed cylinders 221 and the upper through hole 1311, between the two lower fixed cylinders 241 and the lower through hole 1321, between each pair of rear fixed cylinders 261 and each pair of rear through holes 1341, and between each pair of assembled fixed cylinders 272, thereby tightly connecting the left shell A1 and the right shell A2 to the connecting part 13 of the impact tool body 10. An extension rod 282 extends from the front end of the grip 28. The front end of the extension rod 282 forms a non-circular insert 283. The insert 283 is fixedly embedded in the sleeve groove 271 of the sleeve shell 27. A trigger element 281 is inserted through the grip 28. The trigger element 281 is electrically connected to the control main board 231, thereby controlling whether the motor 16 of the impact tool body 10 is started or not.

[0038] Please refer to Figure 8 As shown, when the backless grip device 20 is combined with the connecting part 13 of the impact tool body 10, it becomes a backless impact tool 100 with an interchangeable grip structure. The grip 28 is connected by an extended extension rod 282, allowing the user to operate the impact tool body 10 by holding the grip 28. When the impact tool body 10 is screwed into a low-lying fastener, such as a nut on a railway rail, the user can operate the impact tool body 10 in a standing posture without bending over, thus saving back strength and preventing back injuries.

[0039] The above description is only a preferred embodiment of the present invention. Any equivalent changes made by applying the present invention specification and the claims should be included within the patent scope of the present invention.

[0040] Explanation of reference numerals in the attached figures

[0041] [This invention]

[0042] 100: Impact tool with interchangeable grips

[0043] 10: Impact tool body

[0044] 12: Outer shell

[0045] 13: Connecting parts

[0046] 131: Upper lug

[0047] 1311: Upper through hole

[0048] 1312: Upper concave part

[0049] 132: Lower protruding ear

[0050] 1321: Lower through hole

[0051] 1322: concave part

[0052] 133: Rear Ring Body

[0053] 134: Penetration Section

[0054] 1341: Rear through hole

[0055] 14: Impact Mechanism

[0056] 141: Output Head

[0057] 15: Speed ​​reducer

[0058] 16: Motor

[0059] 20: Grip device

[0060] 21: Connecting shell

[0061] 22: Upper arm shell

[0062] 221: Upper fixed cylinder

[0063] 23: Control circuit compartment

[0064] 231: Control motherboard

[0065] 24: Lower arm shell

[0066] 241: Lower fixed cylinder

[0067] 25: Panel opening

[0068] 251: Status Display Panel

[0069] 26: Rear ring shell

[0070] 261: Rear Fixed Cylinder

[0071] 262: Rear panel

[0072] 263: Limit plate

[0073] 27: Bundle Sheath

[0074] 271: Sleeve Groove

[0075] 272: Assemble the fixing cylinder

[0076] 28: Grip

[0077] 281: Trigger Component

[0078] 282: Extension rod

[0079] 283: Inlay

[0080] A: Shell

[0081] A1: Left shell

[0082] A2: Right shell

[0083] B: Fasteners

Claims

1. An impact tool with an interchangeable grip structure, comprising: An impact tool body has a housing. An impact mechanism, a reducer, and a motor are sequentially connected from front to back within the housing. An output head is connected to the front end of the impact mechanism, extending forward out of the housing. A connecting portion is formed at the rear end of the housing. The connecting portion has an upper lug and a lower lug at the center of its top and bottom surfaces, respectively. The upper lug has an upper through hole, and the lower lug has a lower through hole. A rear ring body is located at the rear end of the connecting portion. A through-hole extends upward from the center of the top side of the rear ring body, and another through-hole extends downward from the center of the bottom side of the rear ring body. Each of the two through-holes has a rear through hole. A grip device includes an upper arm shell, a lower arm shell, and a rear ring shell, the rear ring shell being connected between the upper arm shell and the lower arm shell; the left and right halves of the upper arm shell, lower arm shell, and rear ring shell are divided into a left shell and a right shell that fit together; the rear ring shell is connected to a grip, and a trigger element electrically connected to control the motor is provided on the grip; the upper arm shell covers the top side of the connecting part and the upper lug, and the upper arm shell has two upper fixing cylinders inside, the two upper fixing cylinders abutting against the left and right sides of the upper lug. The lower arm housing covers the bottom side of the connecting portion and the lower lug. The lower arm housing contains two lower fixing cylinders, which abut against the left and right sides of the lower lug. The rear ring housing accommodates the rear ring body and two through-holes. The rear ring housing contains two pairs of rear fixing cylinders, each pair abutting against the left and right sides of each through-hole. A fixing member is inserted and connected between the two upper fixing cylinders and the upper through-hole, between the two lower fixing cylinders and the lower through-hole, and between each pair of rear fixing cylinders and each rear through-hole.

2. The impact tool with an interchangeable grip structure as described in claim 1, wherein, An upper recess is formed at each end of the upper through hole, and the inner ends of the two upper fixing cylinders are respectively embedded in the upper recess for positioning; a lower recess is formed at each end of the lower through hole, and the inner ends of the two lower fixing cylinders are respectively embedded in the lower recess for positioning.

3. The impact tool with an interchangeable grip structure as described in claim 2, wherein, The top surface of the connecting part is an arc-shaped surface, the bottom surface of the connecting part is an arc-shaped surface, and the rear end surface of the connecting part is a vertical surface; the upper lug is connected to the rear end in the middle of the top surface of the connecting part, and the lower lug is connected to the middle of the bottom surface of the connecting part at a position further forward than the upper lug.

4. The impact tool with an interchangeable grip structure as described in claim 3, wherein, The bottom edge of the upper arm shell abuts against the top surface of the connecting part, and the top surface of the lower arm shell abuts against the bottom surface of the connecting part; the outline shape of the left and right sides of the rear ring shell is the same as the outline shape of the left and right sides of the rear ring body and the two through parts.

5. The impact tool with an interchangeable grip structure as described in any one of claims 1 to 4, wherein, The rear ring shell has a rear plate portion located directly behind the rear ring body, and the rear plate portion abuts against the rear ring body and the rear of the two through portions.

6. The impact tool with an interchangeable grip structure as described in claim 5, wherein, The top and bottom sides of the rear ring shell each extend rearward by a connecting shell. The grip is a vertical shell and is connected to the rear ends of the two connecting shells. The trigger element is inserted through the top side of the front of the grip. The two connecting shells, the grip, the rear ring shell, the upper arm shell, and the lower arm shell are connected to form a left and right shell. The upper arm shell, lower arm shell, rear ring shell, two connecting shells, and the left half of the grip form the left shell. The upper fixing cylinder, lower fixing cylinder, and rear fixing cylinder on the left side are disposed inside the left shell. The upper arm shell, lower arm shell, rear ring shell, two connecting shells, and the right half of the grip form the right shell. The upper fixing cylinder, lower fixing cylinder, and rear fixing cylinder on the right side are disposed inside the right shell.

7. The impact tool with an interchangeable grip structure as described in claim 6, wherein, A control circuit chamber is formed together in the lower arm shell, the bottom side of the rear ring shell, and the connecting shell below. A control main board is installed in the control circuit chamber. The motor and the trigger element are electrically connected to the control main board. The top surface of the connecting shell below has a panel opening. A status display panel is embedded in the panel opening. The status display panel is electrically connected to the control main board.

8. The impact tool with an interchangeable grip structure as described in any one of claims 1 to 4, wherein, A limiting plate is provided on the top and bottom sides of the rear ring shell, and the two limiting plates are respectively positioned against the top surface of the upper through part and the bottom surface of the lower through part.

9. The impact tool with an interchangeable grip structure as described in claim 8, wherein, A sleeve shell extends rearward from the rear ring shell, and a sleeve groove extending in the front-to-back direction is formed inside the sleeve shell; the sleeve shell, the rear ring shell, the upper arm shell, and the lower arm shell are connected to form a left shell and a right shell; the right half of the upper arm shell, the lower arm shell, the rear ring shell, and the sleeve shell forms the right shell, and the upper fixing cylinder, the lower fixing cylinder, and the rear fixing cylinder on the right side are disposed inside the right shell; the left half of the upper arm shell, the lower arm shell, the rear ring shell, and the sleeve shell forms the left shell, and the upper fixing cylinder, the lower fixing cylinder, and the rear fixing cylinder on the left side are disposed inside the left shell; an extension rod extends from the front end of the grip, and the front end of the extension rod forms a non-circular insert, which is fixedly embedded in the sleeve groove.

10. The impact tool with an interchangeable grip structure as described in claim 9, wherein, The lower arm housing, the bottom side of the rear ring housing, and the bottom side of the sleeve housing together form a control circuit chamber. A control main board is installed in the control circuit chamber, and the motor and the trigger element are electrically connected to the control main board.

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