Electric tool and anti-loosening machine shell mechanism thereof

Abstract

The invention discloses an electric tool and an anti-loosening machine shell mechanism thereof. The anti-loosening machine shell mechanism comprises a shell body and a connecting part. The shell body comprises a rear shell and a front shell, the rear shell forms a hidden cavity, and the front shell forms an assembly channel. The connecting part comprises an installation assembly, the installation assembly comprises a first installation structure and a second installation structure, any one of the first installation structure and the second installation structure is arranged on the front shell, and the other one of the first installation structure and the second installation structure is arranged on the rear shell. The rear shell is assembled with the front shell through the assembly of the first mounting structure and the second mounting structure, and the first mounting structure and the second mounting structure jointly prevent the rear shell and the front shell from moving in the axial direction of the assembly channel, so that when the adjusting sleeve is rotated, the rear shell and the front shell can move in the axial direction of the assembly channel; the rotation driving mechanism installed on the rear shell, the output shaft installed on the front shell and the clutch mechanism are tightly assembled.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, and more particularly to power tools and their anti-loosening mechanism. Background Technology

[0002] An electric screwdriver is a commonly used power tool for tightening or loosening screws. It consists of a housing, drive mechanism, clutch mechanism, and adjustment mechanism. For ease of assembly, the housing is often a two-piece design, comprising a rear housing and a front housing. The drive mechanism is housed in the rear housing, while the clutch mechanism is in the front housing. The clutch and drive mechanism are tightly connected via a threaded connection between the inner shell of the rear housing and the front housing. Users later need to adjust the pressure applied to the clutch mechanism by rotating an adjustment sleeve threaded onto the outer circumference of the front housing. This adjusts the resistance the screwdriver must overcome to automatically rotate after tightening a screw. Rotating the adjustment sleeve causes the front housing to rotate, potentially separating it from the inner shell and creating relative movement between them. This can disrupt the tight connection between the clutch and drive mechanism, affecting the normal operation of the electric screwdriver. To ensure a tight fit between the clutch and drive mechanisms, assembly personnel apply screw glue between the front and inner housings during assembly. However, the complex production line environment, with its dust and grease mixing with the screw glue, reduces its adhesive strength. Once the screw glue fails, the inner and front housings will still loosen, and the electric screwdriver will still be unusable. Summary of the Invention

[0003] To solve the above-mentioned technical problems and achieve at least one advantage of the present invention, the present invention provides an anti-loosening motor housing mechanism, the anti-loosening motor housing mechanism comprising:

[0004] The shell body includes a rear shell and a front shell. The rear shell includes an inner shell and an outer shell. The inner shell is detachably installed in the space formed by the outer shell, and the inner shell and the outer shell together form a hidden cavity. The inner shell is threadedly connected to the front shell, and the front shell forms an assembly channel.

[0005] Connecting component, the connecting component comprising:

[0006] The mounting assembly includes a first mounting structure and a second mounting structure, one of which is disposed on the front shell and the other on the outer shell. The first mounting structure is assembled with the second mounting structure, and the outer shell is assembled with the front shell through the assembly of the first mounting structure and the second mounting structure. The first mounting structure and the second mounting structure together prevent the outer shell and the front shell from moving axially in the assembly channel.

[0007] The assembly assembly includes a first assembly structure and a second assembly structure, with either the first assembly structure or the second assembly structure disposed on the inner shell and the other disposed on the outer shell. The first assembly structure is assembled with the second assembly structure, and the inner shell is assembled with the outer shell through the first assembly structure and the second assembly structure. The first assembly structure and the second assembly structure together prevent the rear shell and the front shell from moving in the axial and circumferential directions of the assembly channel.

[0008] According to one embodiment of the present invention, the outer shell includes a first part and a second part, the first part being detachably mounted on the second part, and the inner shell being concealedly mounted within the space formed by the first part and the second part.

[0009] According to an embodiment of the present invention, the anti-loosening housing mechanism further includes a locking member, the locking member forming a connecting channel and a fixed channel communicating with the connecting channel, the inner wall of the connecting channel forming an internal thread, the outer wall of the front housing forming an external thread, the locking member being threadedly connected to the front housing, and the ends of the first part and the second part near the front housing being able to extend into and out of the fixed channel.

[0010] According to one embodiment of the present invention, the first mounting structure is implemented as a stop-shifting flange, and the second mounting structure is implemented as a mounting groove; the stop-shifting flange is formed on either the peripheral wall of the outer shell or the peripheral wall of the front shell along its own radial direction, and the mounting groove is formed on the other.

[0011] According to one embodiment of the present invention, the first assembly structure is implemented as a stop pin, and the second assembly structure is implemented as a limiting hole; the stop pin is formed radially on either the side periphery of the inner shell or the side periphery of the outer shell, and the limiting hole is formed on the other side.

[0012] To address the aforementioned technical problems and achieve at least one advantage of the present invention, the present invention provides a power tool, the power tool comprising:

[0013] The anti-loosening motor housing mechanism as described in the above embodiments;

[0014] A drive mechanism includes a drive mechanism and an output shaft. The drive mechanism includes a power component and a torque output component. The torque output component includes a reducer and a belt shaft. The power component is installed in a portion of the hidden cavity formed by the outer shell. The reducer is installed in a portion of the hidden cavity formed by the inner shell. The reducer is disposed between the power component and the belt shaft. The drive force generated by the power component is reduced by the reducer and then transmitted to the belt shaft. The output shaft is rotatably mounted in the assembly channel, and one end of the output shaft is close to the drive mechanism, while the other end of the output shaft away from the drive mechanism extends from the assembly channel to the outside.

[0015] An adjustment mechanism includes an adjustment sleeve and a pressure-applying component. The adjustment sleeve forms an assembly cavity. One end of the front housing away from the rear housing is inserted into the assembly cavity, and the adjustment sleeve is threadedly connected to the front housing. The pressure-applying component is installed in the assembly cavity and extends partially into the assembly channel.

[0016] The clutch mechanism includes a clutch component, an elastic element, and a clutch disc assembly. The clutch disc assembly includes a first clutch disc and a second clutch disc. The first clutch disc is disposed at one end of the output shaft near the torque output member and forms at least one insertion hole. The clutch component includes a blocking element and a plug-in element. The blocking element is sleeved on the output shaft and located on the side of the first clutch disc facing away from the drive shaft. The plug-in element is disposed on the side of the blocking element facing the drive shaft. The second clutch disc is mounted on the end face of the drive shaft away from the reducer, and the first clutch disc and the second clutch disc remain opposite each other. The end face of the second clutch disc facing the first clutch disc forms a pressing protrusion. Each pressing protrusion and the drive shaft form a groove. The plug-in element is movably assembled into the insertion hole and extends into the groove. The elastic element is placed between the blocking element and the pressing element in a compressed state.

[0017] According to one embodiment of the present invention, the first clutch disc is implemented as a flange, and the flange is fixedly sleeved on the output shaft.

[0018] According to one embodiment of the present invention, the first clutch disc and the output shaft are integrally formed, and the first clutch disc is formed by a portion of the output shaft extending radially.

[0019] According to one embodiment of the present invention, the connector is implemented as a steel ball, and the connector is rotatably engaged with the socket.

[0020] According to one embodiment of the present invention, the output shaft has a vent hole formed in the radial direction, and the end of the output shaft near the power member has a movable cavity formed in the axial direction, the vent hole being used to communicate the movable cavity with the assembly channel. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of the power tool described in this invention is shown.

[0022] Figure 2 A cross-sectional view of the power tool described in this invention is shown.

[0023] Figure 3 A partial cross-sectional view of an embodiment of the power tool described in this invention is shown.

[0024] Figure 4 An exploded view of the anti-loosening motor housing mechanism described in this invention is shown.

[0025] Figure 5 An exploded view of a portion of the structure of the power tool described in this invention is shown. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] refer to Figures 1 to 5 A preferred embodiment of the power tool according to the present invention will be described in detail below. The power tool includes an anti-loosening motor housing mechanism 10, a drive mechanism 20, a clutch mechanism 30, and an adjustment mechanism 40.

[0030] The anti-loosening mechanism housing 10 includes a housing body 11 and a connecting component 12. The housing body 11 includes a rear housing 111 and a front housing 112. The rear housing 111 includes an inner housing 1111 and an outer housing 1112. The inner housing 1111 is detachably installed in the space formed by the outer housing 1112, and the inner housing 1111 and the outer housing 1112 together form a hidden cavity 11101. The inner housing 1111 is threadedly connected to the front housing 112. The front housing 112 forms an assembly channel 11201.

[0031] The connecting component 12 includes a mounting component 121 and an assembly component 122.

[0032] The mounting assembly 121 includes a first mounting structure 1211 and a second mounting structure 1212. Either the first mounting structure 1211 or the second mounting structure 1212 is disposed on the front housing 112, and the other is disposed on the outer housing 1112. The first mounting structure 1211 is assembled with the second mounting structure 1212. The outer housing 1112 is assembled with the front housing 112 via the assembly of the first mounting structure 1211 and the second mounting structure 1212, and the first mounting structure 1211 and the second mounting structure 1212 together prevent the outer housing 1112 and the front housing 112 from moving axially along the mounting channel 11201.

[0033] The assembly assembly 122 includes a first assembly structure 1221 and a second assembly structure 1222. Either the first assembly structure 1221 or the second assembly structure 1222 is disposed on the inner shell 1111, and the other is disposed on the outer shell 1112. The first assembly structure 1221 is assembled with the second assembly structure 1222. The inner shell 1111 is assembled with the outer shell 1112 via the first assembly structure 1221 and the second assembly structure 1222, and the first assembly structure 1221 and the second assembly structure 1222 together prevent the rear shell 111 and the front shell 112 from moving axially and circumferentially in the assembly channel 11201, respectively.

[0034] The drive mechanism 20 includes a drive mechanism 21 and an output shaft 22. The drive mechanism 21 is mounted in the concealed cavity 11101. The output shaft 22 is rotatably mounted in the assembly channel 11201, with one end of the output shaft 22 close to the drive mechanism 21 and the other end extending from the assembly channel 11201 to the outside. A screwdriver bit, such as a screwdriver, is detachably mounted on the external end of the output shaft 22; the screwdriver bit acts on fasteners, such as screws.

[0035] Specifically, the drive mechanism 21 includes a power component 211 and a torque output component 212. The torque output component 212 is rotatably connected to the power component 211, and the torque output component 212 can reduce the rotational speed output by the power component 211 before outputting it. The power component 211 is installed in a portion of the hidden cavity 11101 formed by the outer shell 1112, and the torque output component 212 is installed in a portion of the hidden cavity 11101 formed by the inner shell 1111.

[0036] In one example, the power component 211 is implemented as including an electric motor.

[0037] Specifically, the torque output component 212 includes a reducer 2121 and a belt shaft 2122. The reducer 2121 is installed in part of the hidden cavity 11101 formed by the inner shell 1111, and the reducer 2121 is disposed between the power component 211 and the belt shaft 2122. The driving force generated by the power component 211 is reduced by the reducer 2121 and then transmitted to the belt shaft 2122, so that the belt shaft 2122 can obtain a large torque.

[0038] In one example, the reducer 2121 is implemented as a planetary reducer. The adjustment mechanism 40 includes an adjustment sleeve 41 and a pressure member 42. The adjustment sleeve 41 forms an assembly cavity 4101. One end of the front housing 112, remote from the rear housing 111, is inserted into the assembly cavity 4101, and the adjustment sleeve 41 is threadedly connected to the front housing 112. The pressure member 42 is mounted in the assembly cavity 4101 and extends partially into the assembly channel 11201, wherein one end of the pressure member 42 extending into the assembly channel 11201 abuts against one end of the clutch mechanism 30, remote from the drive mechanism 21. By rotating the adjustment sleeve 41, the adjustment sleeve 41 causes the pressure member 42 to move axially along the output shaft 22.

[0039] The clutch mechanism 30 includes a clutch component 31, an elastic element 32, and a clutch disc assembly 33. The clutch disc assembly 33 includes a first clutch disc 331 and a second clutch disc 332. The first clutch disc 331 is disposed at one end of the output shaft 22 near the torque output member 212, and the first clutch disc 331 forms at least one insertion hole 33101. The clutch component 31 includes a blocking element 311 and a plug-in element 312. The blocking element 311 is sleeved on the output shaft 22 and located on the side of the first clutch disc 331 facing away from the rotating shaft 2122, and the plug-in element 312 is disposed on the side of the blocking element 311 facing the rotating shaft 2122. The second clutch disc 332 is mounted on the end face of the rotating shaft 2122 away from the reducer 2121, and the first clutch disc 331 and the second clutch disc 332 remain opposite each other. The second clutch disc 332 has a pressing protrusion 3321 on one end face facing the first clutch disc 331. A slot 212201 is formed between each of the pressing protrusions 3321 and the rotating shaft 2122. The connector 312 is movably fitted into the insertion hole 33101 and extends into the slot 212201. The elastic member 32 is positioned in a compressed state between the blocking member 311 and the pressure applying member 42.

[0040] When the resistance encountered by the bit is within a preset range, the elastic element 32 is pressed by the pressure element 42, which pushes the blocking element 311 to abut against the first clutch disc 331, and the plug-in element 312 passes through the insertion hole 33101 and extends into the slot 212201, so that the second clutch disc 332 mounted on the rotating shaft 2122 is engaged with the plug-in element 312. In this way, the drive mechanism 21 drives the output shaft 22 to rotate through the clutch component 31, so that the output shaft 22 drives the fastener to screw into and out of the object to be fastened through the bit.

[0041] When the fastener is screwed into the object to be fastened, the resistance experienced by the bit exceeds a preset range. The fastener restricts the output shaft 22 from rotating in the direction driven by the drive mechanism 21. The drive mechanism 21 continues to operate, and the rotation speed of the belt shaft 2122 is greater than the output speed of the output shaft 22. When the belt shaft 2122 rotates to the position where the pressing protrusion 3321 corresponds to the position of the plug 312, the pressing protrusion 3321 overcomes the force of the elastic member 32 on the clutch component 31 and pushes the clutch component 31 to move away from the belt shaft 2122 along the axial direction of the output shaft 22, causing the elastic member 32 to continue to undergo elastic deformation. Subsequently, the second clutch disc 332 installed on the belt shaft 2122 separates from the plug 312 inserted into the first clutch disc 331, and the output shaft 22 stops rotating. When the resistance experienced by the bit returns to a preset range, the elastic element 32, through its own elasticity, drives the clutch component 31 to move along the axial direction of the output shaft 22 towards the rotating shaft 2122, and the insertion member 312 extends into the slot 212201. It is worth noting that the pressure exerted by the pressure member 42 on the elastic element 32 is adjusted by rotating the adjusting sleeve 41, thereby adjusting the resistance that must be overcome when the second clutch disc 332 separates from the insertion member 312 inserted into the first clutch disc 331.

[0042] In one example, the elastic element 32 is implemented as a spring.

[0043] In one embodiment, the first clutch disc 331 is implemented as a flange, which is fixedly fitted onto the output shaft 22.

[0044] As deformable, the first clutch disc 331 and the output shaft 22 are integrally formed, with the first clutch disc 331 being formed by a portion of the output shaft 22 extending radially.

[0045] In one embodiment, the connector 312 is implemented as a pin, and the connector 312 is mounted on one end face of the stop member 311 facing the first clutch disc 331.

[0046] As deformable, the connector 312 is implemented as a steel ball, and the connector 312 is rotatably engaged with the socket 33101. When the rotating shaft 2122 rotates to the position where the pressing protrusion 3321 corresponds to the connector 312, the connector 312 can convert the sliding friction between the connector 312 and the pressing protrusion 3321 into rolling friction. The connector 312 reduces the frictional force during the process of the rotating shaft 2122 rotating and pressing the connector 312 by rolling.

[0047] In one embodiment, the first mounting structure 1211 is implemented as a stop-shifting flange; the second mounting structure 1212 is implemented as a mounting groove. The stop-shifting flange is formed radially on either the peripheral wall of the outer shell 1112 or the peripheral wall of the front shell 112, while the mounting groove is formed on the other. The front shell 112 is assembled to the rear shell 111 by engaging the stop-shifting flange with the mounting groove. The engagement of the stop-shifting flange with the mounting groove prevents axial movement of the front shell 112 along the assembly channel 11201, thereby ensuring a tight fit between the drive mechanism 21 mounted on the rear shell 111, the output shaft 22 mounted on the front shell 112, and the clutch mechanism 30.

[0048] In one embodiment, the first assembly structure 1221 is implemented as a stop pin; the second assembly structure 1222 is implemented as a limiting hole. The stop pin is formed radially on either the side periphery of the inner shell 1111 or the side periphery of the outer shell 1112, while the limiting hole is formed on the other. The inner shell 1111 is assembled with the outer shell 1112 by inserting the stop pin into the limiting hole, and the engagement of the limiting hole and the stop pin prevents the inner shell 1111 from moving axially or rotating along the assembly channel 11201.

[0049] Because the existing front housing 112 and inner housing 1111 are connected by threads and glued together, once the glue fails, when rotating the adjusting sleeve 41 to adjust the resistance to be overcome in separating the clutch mechanism 30 from the drive mechanism 21, the front housing 112 will rotate in the same direction as the adjusting sleeve 41. Therefore, the front housing 112 is rotated by the adjusting sleeve 41 and moves along its own axial direction, causing loosening between the front housing 112 and the inner housing 1111. This results in the drive mechanism 21 installed on the rear housing 111 and the output shaft 22 and clutch mechanism 30 installed on the front housing 112 not being able to maintain a tight fit. Compared to using screws to fix the outer housing 1112 and the inner housing 1111, as well as the outer housing 1112 and the front housing 112, the use of screws would increase the weight of the power tool. Therefore, this embodiment does not increase the weight of the power tool, making it easier for the user to use. Alternatively, using screws for assembly requires increasing the wall thickness of the inner shell 1111, the outer shell 1112, and the front shell 112 to ensure the strength of the threaded connection. This would inevitably increase the radial dimensions of the inner shell 1111, the outer shell 1112, and the front shell 112. In this embodiment, the original dimensions of the inner shell 1111, the outer shell 1112, and the front shell 112 can be maintained without changing them, making it easier for the user to hold.

[0050] Preferably, at least three anti-rotation pins and limiting holes are provided. After the anti-rotation pins are assembled with the limiting holes, the anti-rotation pins form at least one triangular structure to increase the stability of the connection between the inner shell 1111 and the outer shell 1112.

[0051] It is worth mentioning that the outer shell 1112 has a preset length to facilitate the user's grip.

[0052] Preferably, the outer casing 1112 includes a first part 11121 and a second part 11122, with the first part 11121 being detachably mounted on the second part 11122. This allows the power component 211 and the torque output component 212 mounted on the inner casing 1111 to be quickly mounted on either the first part 11121 or the second part 11122 when the first part 11121 and the second part 11122 are in the open state, thereby closing the first part 11121 and the second part 11122.

[0053] Furthermore, the anti-loosening housing mechanism 10 also includes a locking member 13. The locking member 13 forms a connecting channel 1301 and a fixing channel 1302 communicating with the connecting channel 1301. The inner wall of the connecting channel 1301 forms an internal thread, and the outer wall of the front housing 112 forms an external thread. The locking member 13 is threadedly connected to the front housing 112. One end of the outer housing 1112 can extend into and out of the fixing channel 1302. When one end of the outer housing 1112 extends into the fixing channel 1302, the inner wall of the fixing channel 1302 clamps the one end of the outer housing 1112, so that the outer housing 1112 is stably connected to the front housing 112. When the locking member 13 rotates relative to the front housing 112, the locking member 13 moves axially along the assembly channel 11201, so that one end of the outer housing 1112 can extend into and out of the fixing channel 1302. The locking member 13 can tightly cover the first part 11121 and the second part 11122. Further, the power tool also includes a braking mechanism 50. The braking mechanism 50 includes a sensing element, a trigger 51, a linkage 52, and a reset element (the sensing element and the reset element are not shown in the accompanying drawings). The sensing element is electrically connected to a control circuit board that controls the start and stop of the power component 211. An axially movable cavity 2201 is formed at one end of the output shaft 22 near the power component 211. The output shaft 22 also forms at least one vent hole 2202 and at least one through hole 2203, the vent hole 2202 allowing gas to flow into or out of the movable cavity 2201. The trigger 51 is movably inserted into the movable cavity 2201 along the axial direction of the output shaft 22, with the sensing element and one end face of the trigger 51 facing each other. When the trigger 51 moves along the axial direction of the output shaft 22, the trigger 51 can move closer to or further away from the sensing element. The reset member is connected to the trigger member 51 and undergoes elastic deformation when the trigger member 51 approaches the sensing element. The linkage member 52 is assembled into the through hole 2203, and both ends of the linkage member 52 abut against the trigger member 51 and the blocking member 311, respectively. The trigger member 51 is configured to be moved towards the sensing element by the blocking member 311 via the linkage member 52 when the second clutch disc 332 mounted on the rotating shaft 2122 is separated from the connector 312 inserted into the first clutch disc 331, so that the trigger member 51 contacts the sensing element and stops the power component 211.

[0054] In one example, the sensing element is implemented as a Hall sensor; the linkage 52 is implemented as a steel ball; and the reset element is implemented as a spring.

[0055] In a preferred embodiment, the output shaft 22 also forms a vent 2202 in the radial direction. The vent 2202 is used to connect the movable cavity 2201 with the assembly channel 11201. Since the vent 2202 is covered by the housing body 11, dust and other debris in the external environment are not easily allowed to enter the movable cavity 2201 through the vent 2202, thereby protecting the internal parts of the power tool, extending the service life of the power tool, and reducing the maintenance frequency of the power tool (this embodiment is not shown in the accompanying drawings).

[0056] Specifically, the present invention also provides an assembly method for the anti-loosening housing mechanism 10, comprising the following steps:

[0057] (A) The front shell 112 and the inner shell 1111 are threaded together.

[0058] (B) The outer shell 1112 is assembled with the front shell 112 and the inner shell 1111 in such a way that the first mounting structure 1211 and the second mounting structure 1212 are snapped together and the first assembly structure 1221 and the second assembly structure 1222 are plugged into each other.

[0059] In step (B), the first part 11121 and the second part 11122 are fitted together such that the first mounting structure 1211 is assembled with the second mounting structure 1212 and the first assembly structure 1221 is assembled with the second assembly structure 1222, so that the first part 11121 and the second part 11122 are respectively assembled with the front shell 112 and the inner shell 1111.

[0060] Furthermore, it also includes a step (C) in which the locking member 13 penetrates the front housing 112 and is tightened, so that the locking member 13 holds the first part 11121 and the second part 11122 tightly.

[0061] 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 anti-loosening mechanism for the engine housing, characterized in that, The anti-loosening housing mechanism includes: The shell body includes a rear shell and a front shell. The rear shell includes an inner shell and an outer shell. The inner shell is detachably installed in the space formed by the outer shell, and the inner shell and the outer shell together form a hidden cavity. The inner shell is threadedly connected to the front shell, and the front shell forms an assembly channel. Connecting component, the connecting component comprising: The mounting assembly includes a first mounting structure and a second mounting structure, one of which is disposed on the front shell and the other on the outer shell. The first mounting structure is assembled with the second mounting structure, and the outer shell is assembled with the front shell through the assembly of the first mounting structure and the second mounting structure. The first mounting structure and the second mounting structure together prevent the outer shell and the front shell from moving axially in the assembly channel. The assembly assembly includes a first assembly structure and a second assembly structure, with either the first assembly structure or the second assembly structure disposed on the inner shell and the other disposed on the outer shell. The first assembly structure is assembled with the second assembly structure, and the inner shell is assembled with the outer shell through the first assembly structure and the second assembly structure. The first assembly structure and the second assembly structure together prevent the rear shell and the front shell from moving in the axial and circumferential directions of the assembly channel.

2. The anti-loosening mechanism for the engine housing according to claim 1, characterized in that, The first mounting structure is implemented as a stop-shifting flange, and the second mounting structure is implemented as a mounting groove; the stop-shifting flange is formed on either the peripheral wall of the outer shell or the peripheral wall of the front shell along its own radial direction, and the mounting groove is formed on the other.

3. The anti-loosening mechanism for the engine housing according to claim 2, characterized in that, The first assembly structure is implemented as a stop pin, and the second assembly structure is implemented as a limiting hole; the stop pin is formed radially on either the side periphery of the inner shell or the side periphery of the outer shell, and the limiting hole is formed on the other side.

4. The anti-loosening mechanism according to any one of claims 1 to 3, characterized in that, The outer shell includes a first part and a second part, the first part being detachably mounted on the second part, and the inner shell being concealed within the space formed by the first part and the second part.

5. The anti-loosening mechanism for the engine housing according to claim 4, characterized in that, The anti-loosening housing mechanism also includes a locking member, which forms a connecting channel and a fixed channel communicating with the connecting channel. The inner wall of the connecting channel forms an internal thread, and the outer wall of the front housing forms an external thread. The locking member is threadedly connected to the front housing, and the ends of the first part and the second part near the front housing can extend into and out of the fixed channel.

6. A power tool, characterized in that, The power tool includes: The anti-loosening motor housing mechanism as described in any one of claims 1 to 5; A drive mechanism includes a drive mechanism and an output shaft. The drive mechanism includes a power component and a torque output component. The torque output component includes a reducer and a belt shaft. The power component is installed in a portion of the hidden cavity formed by the outer shell. The reducer is installed in a portion of the hidden cavity formed by the inner shell. The reducer is disposed between the power component and the belt shaft. The drive force generated by the power component is reduced by the reducer and then transmitted to the belt shaft. The output shaft is rotatably mounted in the assembly channel, and one end of the output shaft is close to the drive mechanism, while the other end of the output shaft away from the drive mechanism extends from the assembly channel to the outside. An adjustment mechanism includes an adjustment sleeve and a pressure-applying component. The adjustment sleeve forms an assembly cavity. One end of the front housing away from the rear housing is inserted into the assembly cavity, and the adjustment sleeve is threadedly connected to the front housing. The pressure-applying component is installed in the assembly cavity and extends partially into the assembly channel. A clutch mechanism includes a clutch component, an elastic element, and a clutch disc assembly. The clutch disc assembly includes a first clutch disc and a second clutch disc. The first clutch disc is disposed at one end of the output shaft near the torque output member and forms at least one insertion hole. The clutch component includes a blocking element and a plug-in element. The blocking element is sleeved on the output shaft and located on the side of the first clutch disc facing away from the drive shaft. The plug-in element is disposed on the side of the blocking element facing the drive shaft. The second clutch disc is mounted on the end face of the drive shaft away from the reducer, and the first clutch disc and the second clutch disc remain opposite each other. The end face of the second clutch disc facing the first clutch disc forms a pressing protrusion. Each pressing protrusion and the drive shaft form a groove. The plug-in element is movably assembled into the insertion hole and extends into the groove. The elastic element is placed in a compressed state between the blocking element and the pressing element.

7. The power tool according to claim 6, characterized in that, The first clutch disc is implemented as a flange, which is fixedly fitted onto the output shaft.

8. The power tool according to claim 6, characterized in that, The first clutch disc and the output shaft are integrally formed, and the first clutch disc is formed by a portion of the output shaft extending radially.

9. The power tool according to claim 7 or 8, characterized in that, The connector is implemented as a steel ball, and the connector is rotatably snapped into the socket.

10. The power tool according to claim 9, characterized in that, The output shaft has a vent hole in the radial direction, and the end of the output shaft near the power component has a movable cavity in the axial direction. The vent hole is used to connect the movable cavity to the assembly channel.

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