Electric tool

Abstract

The invention provides an electric tool, which comprises a first shell, a second shell and a third shell, and is characterized in that the first shell is provided with a connecting part; the motor is accommodated in the first shell; the second shell comprises a first part and a second part connected with the first part, the connecting part extends into the space between the first part and the second part, and the connecting part and the inner surface of the second shell are spaced to form a first gap for the second shell to move; the first gap surrounds the peripheral surface of the connecting part; the battery pack is connected with the second shell; the elastic piece is connected between the connecting part and the second shell, the elastic piece is arranged in a part of the circumferential area in the circumferential direction of the connecting part so that the gap can form a filling area and a non-filling area in the circumferential direction, the filling area can absorb vibration from the first shell, and the non-filling area can absorb vibration from the second shell. And the non-filling area reserves a free movement space of the second shell.

Description

Technical Field

[0001] This invention relates to the field of tool technology, and more particularly to a power tool. Background Technology

[0002] Handheld power tools are portable mechanical devices that use an electric motor as a power source and then convert the high-speed rotation of the motor's output shaft into a low-speed, high-torque working head through a transmission mechanism such as a planetary gear reducer. Examples include electric drills, electric circular saws, and electric wrenches. To ensure the flexibility and portability of power tools, a battery pack that is detachably connected to the handheld power tool is usually used to power the motor. The housing of the power tool generally includes a main housing and a battery pack housing that are connected to each other. The motor and working head are assembled in the main housing, and the battery pack is detachably connected in the battery pack housing. Due to the large interaction force between the working head and the workpiece when working, there is a violent relative vibration between the main housing and the battery pack housing.

[0003] In existing handheld power tools, some manufacturers use a rigid connection to link the main housing and battery pack housing together. This connection method results in vibration energy being transferred from the main housing to the battery pack housing with almost no reduction, causing the battery pack housing to vibrate quite violently. This severely affects the structural stability and electrical connection reliability of the battery pack mounted on the battery pack housing. Other manufacturers, in order to reduce the vibration energy transmitted from the main housing to the battery pack housing, directly fill the connection point with a rubber pad-like cushioning structure. While this connection method can provide some vibration reduction, it is prone to strength issues at the connection point. After the power tool has been used for a period of time, this can lead to severe wear or even breakage at the connection point. Furthermore, the risk of the battery pack detaching due to vibration remains relatively high. Summary of the Invention

[0004] This invention provides an electric tool to solve the technical problem that the structural stability and electrical connection reliability of the battery pack cannot be guaranteed due to the severe relative vibration between the housing and the battery pack during operation.

[0005] The present invention provides an electric tool comprising: a first housing having a connecting portion; a motor housed within the first housing; a second housing comprising a first portion and a second portion connected to the first portion, the connecting portion extending between the first portion and the second portion and spaced apart from the inner surface of the second housing to form a first gap allowing the second housing to move, the first gap surrounding the outer peripheral surface of the connecting portion; a battery pack connected to the second housing; and at least one elastic member connected between the connecting portion and the second housing, the elastic member being disposed in a portion of the circumferential region along the connecting portion to form a filled region and a non-filled region in the circumferential direction of the gap.

[0006] In one embodiment of the present invention, the filling area includes at least a first area and a second area, with the left-right direction of the power tool as the left-right direction when the user holds the power tool, the first area being located on the left side of the connecting part, and the second area being located on the right side of the connecting part.

[0007] In one embodiment of the present invention, there are two elastic elements, one of which is disposed in the first region and the other is disposed in the second region.

[0008] In one embodiment of the present invention, there are two elastic elements, one of which is disposed between the first part and the connecting part, and the other is disposed between the second part and the connecting part.

[0009] In one embodiment of the present invention, one of the connecting portion and the second housing has a protrusion, and the other has a receiving groove. The elastic member is mounted on the protrusion, and at least a portion of the elastic member is received in the receiving groove.

[0010] In one embodiment of the present invention, the connecting portion has a first connecting surface, on which the protrusion is provided; the inner surface of the second housing has a second connecting surface, on which the receiving groove is provided; at least a portion of the elastic member is located between the first connecting surface and the second connecting surface.

[0011] In one embodiment of the present invention, the connecting part includes a main body and a mounting bracket. The mechanical strength of the mounting bracket is greater than that of the main body. The mounting bracket includes a mounting part and a protruding post. The mounting part is connected to the main body, and the protruding post is connected to the mounting part and protrudes from the first connecting surface toward the second housing.

[0012] In one embodiment of the present invention, the projected area of ​​the mounting portion on the first connecting surface is greater than the projected area of ​​the protrusion on the first connecting surface.

[0013] In one embodiment of the present invention, the mounting bracket is integrally formed on the main body.

[0014] In one embodiment of the present invention, the mounting bracket is a metal part, and the main body is a plastic part.

[0015] In one embodiment of the present invention, the elastic member includes: a seat portion located between the first connecting surface and the second connecting surface; and a plug portion connected to the side of the seat portion away from the first connecting surface, the plug portion being accommodated in the receiving groove.

[0016] In one embodiment of the present invention, the elastic member includes a plurality of the insertion portions, which are spaced apart on the seat portion along the axial direction of the motor.

[0017] In one embodiment of the present invention, the connecting portion has two first surfaces and two first connecting surfaces, the two first surfaces being spaced apart along the front-rear direction of the power tool, and the two first connecting surfaces being spaced apart along the left-right direction of the power tool; the inner surface of the second housing has two second surfaces and two second connecting surfaces, the two second surfaces being spaced apart along the front-rear direction of the power tool, and the two second connecting surfaces being spaced apart along the left-right direction of the power tool; wherein, a non-filled area is provided between the first surfaces and the second surfaces, and a filled area is provided between the first connecting surfaces and the second connecting surfaces.

[0018] In one embodiment of the present invention, the power tool further includes a terminal block, which is connected between the first part and the second part and spaced apart from the first housing. Both the first part and the second part are provided with guide rails, the battery pack is slidable along the guide rails, and the terminals on the battery pack are detachably connected to the terminal block.

[0019] In one embodiment of the present invention, the first housing includes a main housing and a handle, the main housing is disposed at a first end of the handle, the connecting portion is disposed at a second end of the handle, and the motor is housed within the main housing.

[0020] In one embodiment of the present invention, the second end of the handle is provided with a base, with the left and right direction of the power tool when the user holds the power tool as the left and right direction, and the insertion and removal direction of the battery pack as the front and back direction. The maximum size of the base in the front and back direction is greater than the maximum size of the handle in the front and back direction, and the maximum size of the base in the left and right direction is greater than the maximum size of the handle in the left and right direction. The connecting part is provided on the side of the base away from the handle.

[0021] In one embodiment of the present invention, the bottom surface of the base is spaced apart from the top surface of the second housing to form a second gap that allows the second housing to move. The second gap is annular and communicates with the first gap.

[0022] In one embodiment of the present invention, the seat contains a first circuit board.

[0023] In one embodiment of the present invention, the handle contains a second circuit board.

[0024] In one embodiment of the present invention, the first part and the second part are provided with bolt mounting portions protruding from their outer surfaces, and the second housing further includes bolts, which pass through the bolt mounting portions to fix the first part and the second part together.

[0025] The beneficial effects of this invention are:

[0026] By extending the connecting portion of the first housing between the first and second parts of the second housing and creating a first gap with the inner surface of the second housing, the rigid connection between the first and second housings in the circumferential direction is isolated, blocking the path of direct transmission of vibration energy through rigid contact. Because at least one elastic element is disposed along the circumferential direction of the connecting portion in a portion of the circumferential region, the first gap forms a filled area and a non-filled area in the circumferential direction. The filled area absorbs vibrations from the first housing. Simultaneously, since the elastic element is connected between the connecting portion and the second housing, compared to simply filling the space between the first and second housings with an elastic element, it not only reliably maintains the elastic element within the reserved gap, thus ensuring reliable vibration damping, but also guarantees the connection strength between the first and second housings. The non-filled area retains free movement space for the second housing, allowing it to move in six degrees of freedom relative to the first housing.

[0027] Since the vibration between the first and second housings is mainly transmitted through the filling area, the vibration transmission path, i.e. the direction of vibration transmission to the battery pack, can be controlled by setting the position of the filling area. In particular, the battery pack is usually inserted and removed along the front and back direction of the power tool. The filling area with elastic elements can be arranged on the left and right sides of the power tool so that the vibration is transmitted to the battery pack in the left and right direction, avoiding the battery pack from falling off due to vibration in the front and back direction.

[0028] Furthermore, the elastic element is only located in a portion of the circumferential area, rather than completely enclosing the circumference of the connection. This ensures effective vibration reduction while avoiding fatigue wear caused by excessive rigidity at the connection or excessive compression of the cushioning material due to overfilling, thereby improving the durability and structural strength of the connection. Through this structure, the vibration energy transmitted from the first housing to the second housing is effectively reduced, ensuring the structural stability and electrical connection reliability of the battery pack mounted on the second housing, and extending the service life of the battery pack and related electronic components. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0030] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of a power tool provided in an embodiment of the present invention; Figure 2 This is a partial structural diagram of a power tool with the first housing partially hidden, provided in one embodiment of the present invention; Figure 3 This is an exploded isometric assembly drawing of a power tool provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first right shell provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a mounting bracket provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the second part provided in one embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the elastic element provided in one embodiment of the present invention; Figure 8 This is a partial cross-sectional schematic diagram of a handheld power tool, which mainly includes a first part, a second part, a connecting part, and an elastic element, according to an embodiment of the present invention. Figure 9 This is a partial cross-sectional view of a power tool with a second housing section provided in one embodiment of the present invention; Figure 10 for Figure 9 A magnified view of part A; Figure 11 This is a longitudinal sectional view of a power tool provided in one embodiment of the present invention; Figure 12 for Figure 11 A magnified view of a portion of Part B; Figure 13 for Figure 11 A magnified view of a portion of section C; Figure 14 This is a schematic diagram of the overall structure of a power tool provided in one embodiment of the present invention from another perspective; Figure 15 This is a schematic diagram of the structure of a battery pack provided in one embodiment of the present invention.

[0031] The attached figures are labeled as follows: 100. First housing; 110. First left housing; 120. First right housing; 130. Connecting part; 131. Main body; 132. Mounting bracket; 132A. Mounting part; 132B. Protrusion; 132C. Anti-detachment groove; 133. First connecting surface; 134. First surface; 140. Main housing; 150. Handle; 160. Base; 170. First ventilation hole; 200. Second housing; 210. First part; 220. Second part; 230. Guide rail; 240. Second connecting surface; 241. Container 250, second surface; 260, bolt mounting part; 270, bolt; 280, second ventilation hole; 300, elastic element; 310, seat; 320, plug-in part; 330, plug-in hole; 400, motor; 500, terminal block; 610, first circuit board; 620, second circuit board; 710, first gap; 711, first area; 712, second area; 720, second gap; 800, battery pack; 810, terminal; 820, guide slider; X, left-right direction; Y, front-back direction. Detailed Implementation

[0032] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] Please see Figures 1-15The power tool provided by this invention includes: a first housing 100, a motor 400, a second housing 200, a battery pack 800, and an elastic element 300. The first housing 100 has a connecting portion 130, and the motor 400 is housed within the first housing 100. Specifically, to ensure the performance parameters of the motor 400, such as power density, speed range, and service life, a brushless motor 400 is preferred. Specifically, the first housing 100 generally also includes a planetary gear-type transmission mechanism, one end of which is connected to the output shaft of the motor 400, and the other end is connected to the working head.

[0035] Specifically, to facilitate the installation of the aforementioned components, the first housing 100 can be configured as a split structure consisting of a first left housing 110 and a first right housing 120. The second housing 200 includes a first portion 210 and a second portion 220 connected to the first portion 210. Specifically, the first portion 210 and the second portion 220 can adopt the following... Figure 3 , Figure 14 The diagram shows two roughly symmetrical half-shell structures.

[0036] The connecting portion 130 extends between the first portion 210 and the second portion 220, and is spaced apart from the inner surface of the second housing 200 to form a form that allows the second housing 200 to move. Figure 8 The first gap 710 shown surrounds the outer peripheral surface of the connecting portion 130. Specifically, the connecting portion 130 can adopt the following... Figure 2 The rectangular boss shown can also be a hexagonal, circular, or other shaped boss. The battery pack 800 is connected to the second housing 200.

[0037] Specifically, the left-right direction when the user holds the power tool is defined as the left-right direction X, and the front-back direction when the user holds the power tool is defined as the front-back direction Y. The battery pack 800 can be plugged into and detached from the second housing 200 along the front-back direction Y. At least one elastic member 300 is connected between the connecting portion 130 and the second housing 200. The elastic member 300 is disposed in a portion of the circumferential region along the connecting portion 130 so that the gap forms a filled area and a non-filled area in the circumferential direction.

[0038] Specifically, the filling area can be located on the left, right, front, rear, left front, right front, left rear, and / or right rear sides of the connecting part 130. Specifically, the elastic element 300 can be connected between the connecting part 130 and the second housing 200 using snap-fit, plug-in, or other methods. Specifically, the elastic element 300 should have sufficient rigidity to provide adequate support, thereby ensuring the connection strength between the first housing 100 and the second housing 200, while also having sufficient damping to dissipate vibration energy. Furthermore, it should have a high fatigue life to withstand multiple vibration cycles between the housings. Specifically, the elastic element 300 can be made of nitrile rubber, silicone rubber, thermoplastic elastomers, etc.

[0039] By extending the connecting portion 130 of the first housing 100 between the first portion 210 and the second portion 220 of the second housing 200, and forming a first gap 710 with the inner surface of the second housing 200, the rigid connection between the first housing 100 and the second housing 200 in the circumferential direction is isolated, blocking the path of vibration energy directly transmitted through rigid contact.

[0040] Because at least one elastic element 300 is disposed in a portion of the circumferential region along the connecting portion 130, the first gap 710 forms a filled region and a non-filled region in the circumferential direction. The filled region can absorb vibrations from the first housing 100. Meanwhile, since the elastic element 300 is connected between the connecting portion 130 and the second housing 200, compared to simply filling the space between the first housing 100 and the second housing 200, not only can the elastic element 300 be reliably held within the reserved gap, thus ensuring a reliable vibration damping effect, but the connection strength between the first housing 100 and the second housing 200 is also guaranteed. The non-filled region retains free movement space for the second housing 200, allowing the second housing 200 to move relative to the first housing 100 in six degrees of freedom.

[0041] Since vibration between the first housing 100 and the second housing 200 is mainly transmitted through the filling area, the vibration transmission path, i.e., the direction of vibration transmission to the battery pack 800, can be controlled by setting the position of the filling area. In particular, since the battery pack 800 is typically inserted and removed along the front-back direction (Y) of the power tool, the filling area where the elastic element 300 is located can be arranged on the left and right sides of the power tool. This ensures that vibration is transmitted to the battery pack 800 along the left-right direction (X), preventing vibration in the front-back direction (Y) from causing the battery pack 800 to detach.

[0042] Furthermore, the elastic element 300 is only disposed in a portion of the circumferential area, rather than completely enclosing the circumference of the connecting part 130. While ensuring effective vibration reduction, it avoids fatigue wear caused by excessive rigidity at the connection or excessive compression of the cushioning material due to overfilling, thereby improving the durability and structural strength of the connection. Through the above structure, the vibration energy transmitted from the first housing 100 to the second housing 200 is effectively reduced, ensuring the structural stability and electrical connection reliability of the battery pack 800 installed on the second housing 200, and extending the service life of the battery pack 800 and related electronic components.

[0043] Please see Figure 8 In an optional embodiment of the present invention, the filling area includes at least a first area 711 and a second area 712. The first area 711 is located on the left side of the connecting portion 130, and the second area 712 is located on the right side of the connecting portion 130, so that the vibration between the first housing 100 and the second housing 200 is mainly transmitted through the left-right direction X, ensuring the connection between the battery pack 800 and the second housing 200. In addition, since power tools mainly rely on the high torque applied to the workpiece by the working head, such as electric wrenches, power tools are usually subjected to the impact of the workpiece reaction in the radial direction of the output shaft of the motor 400. Therefore, the above-mentioned filling area is also located on the transmission path of large vibration energy, thus achieving precise vibration reduction. Specifically, in addition to the above-mentioned first area 711 and second area 712, an elastic member 300 can also be added to the front or rear side of the connecting portion 130.

[0044] Please see Figure 3 , Figure 8 In an optional embodiment of the present invention, there are two elastic elements 300, one of which is located in the first region 711 and the other in the second region 712. Compared with using a single elastic element 300, the above-mentioned two independent elastic elements 300 can avoid the phenomenon that one is deformed by pressure and pulls on the other during operation, realizing independent absorption and attenuation of vibration energy on the left and right sides, and giving the vibration reduction system better dynamic response characteristics.

[0045] Please see Figure 3 , Figures 8-10In one embodiment of the present invention, there are two elastic elements 300. One of the two elastic elements 300 is disposed between the first part 210 and the connecting part 130, and the other is disposed between the second part 220 and the connecting part 130. The above structural design makes the assembly of the elastic elements 300 more convenient. On the other hand, when the first part 210 and the second part 220 are locked together by fasteners such as bolts 270, the shell walls on the left and right sides will apply uniform pre-pressure to the elastic elements 300, so that the elastic elements 300 are in a certain pre-compression state, ensuring that the elastic elements 300 are always tightly fitted with the connecting part 130 and will not loosen due to vibration.

[0046] Please see Figure 3 In one embodiment of the present invention, one of the connecting portion 130 and the second housing 200 has a protrusion 132B, and the other has a receiving groove 241. That is, the protrusion 132B can be provided on the connecting portion 130, and the receiving groove 241 can be formed on the second housing 200. Alternatively, the receiving groove 241 can be formed on the connecting portion 130, and the protrusion 132B can be provided on the second housing 200. The elastic member 300 is mounted on the protrusion 132B, and at least a portion of the elastic member 300 is received within the receiving groove 241. When the elastic member 300 is clamped between the two, the protrusion 132B can be embedded inside the elastic member 300, and the receiving groove 241 can accommodate a portion of the volume of the elastic member 300. The above-described connection structure simultaneously restricts the radial and axial displacement of the elastic member 300, ensuring that even under severe alternating vibration, the elastic member 300 will not slip or dislodge from its working position, thus guaranteeing its long-term operational reliability.

[0047] Please see Figure 3 , Figure 4 , Figure 8 In one embodiment of the present invention, the connecting portion 130 has a first connecting surface 133, on which a protrusion 132B is provided. The inner surface of the second housing 200 has a second connecting surface 240, on which a receiving groove 241 is provided. At least a portion of the elastic member 300 is located between the first connecting surface 133 and the second connecting surface 240.

[0048] When assembling power tools, components such as the motor 400 are typically assembled into the first housing 100, and then the second housing 200 is connected to the first housing 100. The protrusion 132B on the first connecting surface 133 provides a good assembly reference for the elastic element 300. The elastic element 300 can be fitted onto the protrusion 132B before the second housing 200 is assembled into the first housing 100, preventing displacement of the elastic element 300 during assembly and improving assembly efficiency and accuracy. At least a portion of the elastic element 300 is clamped between the first connecting surface 133 and the second connecting surface 240, ensuring a reliable elastic body for vibration damping at the connection between the first housing 100 and the second housing 200.

[0049] Please see Figures 3-5 In one embodiment of the present invention, the connecting portion 130 includes a main body 131 and a mounting bracket 132, wherein the mechanical strength of the mounting bracket 132 is greater than that of the main body 131. Specifically, the main body 131 can be made of ordinary engineering plastic, and the mounting bracket 132 can be made of reinforced nylon, metal, or other materials. The mounting bracket 132 includes a mounting portion 132A and a protrusion 132B, wherein the mounting portion 132A is connected to the main body 131. Specifically, the mounting portion 132A and the main body 131 can be connected by welding, bonding, mechanical connection, or other methods. The protrusion 132B is connected to the mounting portion 132A and protrudes from the first connecting surface 133 toward the second housing 200.

[0050] The above structural design gives the convex post 132B, which is repeatedly subjected to the compression and impact of the elastic element 300, higher wear resistance and fatigue strength, avoiding wear, breakage or deformation failure of the convex post 132B due to insufficient local strength, thereby further ensuring the working reliability of the vibration reduction system.

[0051] Please see Figures 3-5 In an optional embodiment of the present invention, the projected area of ​​the mounting portion 132A on the first connecting surface 133 is larger than the projected area of ​​the protrusion 132B on the first connecting surface 133. This allows the vibration load transmitted from the protrusion 132B to the mounting portion 132A and then to the main body 131 to be distributed over a larger area, thereby effectively reducing the pressure on the contact surface between the main body 131 and the mounting portion 132A and significantly improving the long-term reliability of the connection.

[0052] Specifically, the mounting part 132A can adopt a cylindrical structure with a larger diameter, while the protruding column 132B can adopt a cylindrical structure with a smaller diameter. In order to ensure that the mounting bracket 132 has uniform mechanical properties in all directions, the two are preferably arranged as a coaxial structure.

[0053] Please see Figure 4 , Figure 5In an optional embodiment of the present invention, the mounting bracket 132 is integrally formed on the main body 131. On the one hand, the integral structure creates a seamless continuous structure between the mounting bracket 132 and the main body 131, eliminating the connection interface in a split design. When the power tool is working, vibration energy does not need to pass through the interface between different components during transmission, avoiding local stress concentration and significantly improving the overall rigidity and vibration resistance of the connection part 130. On the other hand, the integral structure also simplifies the connection process between the mounting bracket 132 and the main body 131, ensuring the positional accuracy of the mounting bracket 132 on the main body 131.

[0054] Specifically, the main body 131 can be made of plastic, and the mounting bracket 132 can be made of metal, with both integrally molded using an insert injection molding method. Specifically, to ensure that the mounting bracket 132 is securely connected to the main body 131 after injection molding, a feature such as... can be provided on the mounting portion 132A. Figure 5 The anti-detachment groove 132C shown is an interlocking structure that forms a reliable connection between the two.

[0055] In an optional embodiment of the present invention, the mounting bracket 132 is a metal part. Specifically, the mounting bracket 132 can be made of metals such as aluminum alloy and stainless steel, and the main body 131 is a plastic part.

[0056] The metal mounting bracket 132 ensures sufficient bending, shear, and fatigue strength, enabling it to withstand the alternating stress transmitted by the elastic element 300 for extended periods without deformation or breakage. The plastic body 131 reduces the weight of the first housing 100 and the entire power tool, improving portability and comfort during handheld operation.

[0057] Please see Figure 3 , Figure 7 In an optional embodiment of the present invention, the elastic member 300 includes a seat portion 310 and a plug portion 320. The seat portion 310 is located between the first connecting surface 133 and the second connecting surface 240, and the plug portion 320 is connected to the side of the seat portion away from the first connecting surface 133. The plug portion 320 is accommodated in the receiving groove 241. Specifically, in order to form a mating plug structure with the protrusion 132B, a form can be provided on the elastic member 300 as shown in the figure. Figure 7 The shown portion extends from the seat 310 to the insertion portion 320, with a diameter of insertion hole 330 that matches the protrusion 132B.

[0058] The seat 310 is mainly used to absorb vibration and impact forces in the normal direction of the first connecting surface 133 and the second connecting surface 240, while the plug-in part 320 is mainly used to absorb vibration and impact forces in any direction perpendicular to the normal direction of the first connecting surface 133 and the second connecting surface 240. That is, the seat 310 mainly bears the impact load in the normal direction, while the plug-in part 320 mainly bears complex loads such as shear and torsion, thereby comprehensively improving the vibration reduction effect of power tools in multi-dimensional vibration environments.

[0059] Please see Figure 3 , Figure 7 In an optional embodiment of the present invention, the elastic member 300 includes a plurality of insertion portions 320, which are spaced apart on the base portion 310 along the axial direction of the motor 400. Specifically, the plurality of insertion portions 320 may be connected to one base portion 310, or each insertion portion 320 may be connected to an independent base portion 310, or two, three or other numbers of insertion portions 320 may be connected to one base portion 310.

[0060] By arranging multiple insertion portions 320 at intervals along the axis of the motor 400 on the base, a multi-point support structure is formed along the axis of the motor 400. When the power tool is working, the impact force or torsional torque exerted by the first housing 100 on the second housing 200 is jointly borne and resisted by the multiple spaced insertion portions 320. The aforementioned multi-point support effectively enhances the vibration resistance of the power tool.

[0061] Please see Figure 3 , Figure 8 , Figures 11-13 In an optional embodiment of the present invention, the connecting portion 130 has two first surfaces 134 and two first connecting surfaces 133. The two first surfaces 134 are spaced apart along the front-rear direction Y of the power tool, and the two first connecting surfaces 133 are spaced apart along the left-right direction X of the power tool. The inner surface of the second housing 200 has two second surfaces 250 and two second connecting surfaces 240. The two second surfaces 250 are spaced apart along the front-rear direction Y of the power tool, and the two second connecting surfaces 240 are spaced apart along the left-right direction X of the power tool.

[0062] A non-filled area is provided between the first surface 134 and the second surface 250. Specifically, as shown... Figure 12 , Figure 13 As shown, the width D1 of the first gap 710 portion where the non-filled area is located can be set to values ​​such as 2mm, 2.5mm, 3mm, and 3.5mm. A filling area is provided between the first connecting surface 133 and the second connecting surface 240. The width D1 of the first gap 710 portion is the shortest distance between the first surface 134 and the second surface 250.

[0063] The above design effectively absorbs the significant vibration energy generated by the power tool in the left-right X direction through the elastic element 300. Furthermore, during operation, the operator needs to apply substantial thrust to the workpiece in the front-back Y direction. By providing a non-filled area between the first surface 134 and the second surface 250, the thrust applied by the operator is ensured to be directly and efficiently transmitted to the workpiece head, guaranteeing the accuracy and efficiency of drilling, cutting, and other operations. In addition, vibrations in the front-back Y direction can be isolated through the gap; therefore, the above design achieves precise control of the vibration transmission path.

[0064] Please see Figure 3 , Figure 11 , Figure 12 , Figure 14 In an optional embodiment of the present invention, the power tool further includes a terminal block 500, which is connected between the first portion 210 and the second portion 220 and spaced apart from the first housing 100. Specifically, it can be as follows: Figure 12 As shown, a vertical isolation gap is provided between the terminal block 500 and the connecting portion 130. Guide rails 230 are provided on both the first portion 210 and the second portion 220, and the battery pack 800 can slide along the guide rails 230. Specifically, a guide slider 820 adapted to the guide rail 230 can be provided on the battery pack 800, and the terminals 810 on the battery pack 800 are detachably connected to the terminal block 500.

[0065] By spacing the terminal block 500 from the first housing 100, the terminal block 500 used for electrical connection of the battery pack 800 is structurally separated from the first housing 100. This effectively blocks the path of vibration directly transmitted through the first housing 100 to the terminal block 500, avoiding poor contact, momentary disconnection, or wear of the terminal 810 caused by vibration, thereby improving the stability and reliability of the power supply from the battery pack 800.

[0066] Please see Figure 2 In an optional embodiment of the present invention, the first housing 100 includes a main housing 140 and a handle 150. The main housing 140 is disposed at the first end of the handle 150, the connecting part 130 is disposed at the second end of the handle 150, and the motor 400 is housed in the main housing 140.

[0067] By housing the motor 400 within the main housing 140 and placing the connecting portion 130 at the second end of the handle 150, the vibrations generated by the motor 400 must pass through the entire handle 150 area before being transmitted to the connecting portion 130. The handle 150 itself can passively dampen vibrations, thereby reducing the intensity of the vibrations ultimately transmitted to the connecting portion 130.

[0068] Please see Figure 1 , Figure 2 , Figure 4 , Figure 11 In an optional embodiment of the present invention, the second end of the handle 150 is provided with a base 160. The left-right direction X when the user holds the power tool is taken as the left-right direction X of the power tool, and the insertion and removal direction of the battery pack 800 is taken as the front-back direction Y. The maximum size of the base 160 in the front-back direction Y is greater than the maximum size of the handle 150 in the front-back direction Y. The maximum size of the base 160 in the left-right direction X is greater than the maximum size of the handle 150 in the left-right direction X. The connecting part 130 is provided on the side of the base 160 away from the handle 150.

[0069] The dimensions of the base 160 in the left-right direction X and front-back direction Y are designed to be larger than those of the handle 150. This helps to improve the stability and structural strength of the base 160, provides a reliable connection for the connection part 130, and allows the base 160 to cover the connection part 130, the second housing 200 and the first gap 710, preventing the first gap 710 from being exposed from above.

[0070] Furthermore, the second housing 200 does not protrude beyond the base 160 in the left-right (X) and front-back (Y) directions, which helps maintain the consistency and aesthetics of the power tool's bottom. Because the base 160 is larger, the connecting portion 130 and the second housing 200, which are covered by the base 160, can be made larger, resulting in a stronger and more stable connecting portion 130. This allows for a more even distribution of vibration energy and working load, thereby improving the stability and reliability of the connection between the first housing 100 and the second housing 200. Additionally, during the transmission of vibration from the handle 150 to the base 160 and then from the base 160 to the connecting portion 130, the larger base 160 allows for a more even diffusion and distribution of vibration load, avoiding the risk of stress concentration at the connecting portion 130.

[0071] Please see Figure 12 , Figure 13 In an optional embodiment of the present invention, the bottom surface of the base 160 and the top surface of the second housing 200 are spaced apart to form a second gap 720 that allows the second housing 200 to move. The second gap 720 is annular and communicates with the first gap 710. Specifically, the width D2 of the second gap 720 can be set to values ​​such as 0.5mm, 1mm, or 1.5mm. The width D2 of the second gap 720 is the shortest distance between the bottom surface of the base 160 and the top surface of the second housing 200.

[0072] The second gap 720 prevents rigid contact between the bottom surface of the seat and the top surface of the second housing 200 when the first housing 100 vibrates, thereby further isolating the transmission path of vibration energy in the vertical direction between the first housing 100 and the second housing 200. The connected first gap 710 and second gap 720 block the possibility of vibration being transmitted between the first housing 100 and the second housing 200 through rigid contact, forcing vibrations in all directions to be transmitted to the second housing 200 through the elastic element 300, where they are effectively absorbed and attenuated, achieving multi-dimensional vibration isolation.

[0073] Please see Figure 2 In an optional embodiment of the present invention, the base contains a first circuit board 610. Specifically, the first circuit board 610 can be disposed below and electrically connected to the switch button control board, mainly controlling the switching of the power tool and the control of the output torque, etc.

[0074] Please see Figure 2 In an optional embodiment of the present invention, the handle 150 houses a second circuit board 620. Specifically, the second circuit board 620 is mainly connected to the motor 400 and is responsible for controlling the performance of the motor 400, such as its steering. Typically, the volume of the second circuit board 620 is larger than that of the first circuit board 610. By placing the second circuit board 620 in the handle 150, more space can be saved in the second housing 200 for arranging the elastic element 300, the first gap 710, and other buffer systems.

[0075] Please see Figure 1 , Figure 3 In an optional embodiment of the present invention, the first part 210 and the second part 220 are provided with bolt mounting portions 260 protruding from their outer surfaces, and the second housing 200 further includes bolts 270, which pass through the bolt mounting portions 260 to fix the first part 210 and the second part 220 together. This design avoids the bolt mounting portions 260 and bolts 270 occupying internal space in the second housing 200, allowing more space to be reserved for a buffer system such as the elastic element 300 and the first gap 710.

[0076] Please see Figure 1 , Figure 4 In order to ensure that the heat generated by components such as motor 400, first circuit board 610, and second circuit board 620 can be dissipated from the housing in a timely manner, a first ventilation hole 170 can be opened on the first housing 100, and a second ventilation hole 280 connected to the first ventilation hole 170 can be opened on the second housing 200.

[0077] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A power tool, characterized in that, include: A first housing, the first housing having a connecting portion; The motor is housed within the first housing; The second housing includes a first part and a second part connected to the first part. The connecting part extends between the first part and the second part and is spaced apart from the inner surface of the second housing to form a first gap that allows the second housing to move. The first gap surrounds the outer peripheral surface of the connecting part. The battery pack is connected to the second housing; At least one elastic element is connected between the connecting portion and the second housing. The elastic element is disposed in a portion of the circumferential region along the connecting portion so that the gap forms a filled region and a non-filled region in the circumferential direction.

2. The power tool according to claim 1, characterized in that, The filling area includes at least a first area and a second area, with the left-right direction of the power tool as the left-right direction when the user holds the power tool. The first area is located on the left side of the connecting part, and the second area is located on the right side of the connecting part.

3. The power tool according to claim 2, characterized in that, There are two elastic elements, one of which is located in the first region and the other is located in the second region.

4. The power tool according to claim 2, characterized in that, There are two elastic elements, one of which is located between the first part and the connecting part, and the other is located between the second part and the connecting part.

5. The power tool according to claim 1, characterized in that, One of the connecting portion and the second housing has a protrusion, and the other has a receiving groove. The elastic element is mounted on the protrusion, and at least a portion of the elastic element is received in the receiving groove.

6. The power tool according to claim 5, characterized in that, The connecting part has a first connecting surface, and the protruding post is provided on the first connecting surface; The inner surface of the second housing has a second connecting surface, and the receiving groove is provided on the second connecting surface; At least a portion of the elastic element is located between the first connecting surface and the second connecting surface.

7. The power tool according to claim 6, characterized in that, The connecting part includes a main body and a mounting bracket. The mechanical strength of the mounting bracket is greater than that of the main body. The mounting bracket includes a mounting part and a protruding post. The mounting part is connected to the main body, and the protruding post is connected to the mounting part and protrudes from the first connecting surface toward the second housing.

8. The power tool according to claim 7, characterized in that, The projected area of ​​the mounting part on the first connecting surface is greater than the projected area of ​​the protruding post on the first connecting surface.

9. The power tool according to claim 7, characterized in that, The mounting bracket is integrally formed on the main body.

10. The power tool according to claim 7, characterized in that, The mounting bracket is made of metal, and the main body is made of plastic.

11. The power tool according to claim 6, characterized in that, The elastic element includes: The seat portion is located between the first connecting surface and the second connecting surface; A plug-in portion is connected to the side of the base portion away from the first connecting surface, and the plug-in portion is accommodated within the receiving groove.

12. The power tool according to claim 11, characterized in that, The elastic element includes a plurality of the plug-in portions, which are spaced apart on the base portion along the axial direction of the motor.

13. The power tool according to claim 6, characterized in that, The connecting part has two first surfaces and two first connecting surfaces. The two first surfaces are spaced apart along the front-back direction of the power tool, and the two first connecting surfaces are spaced apart along the left-right direction of the power tool. The inner surface of the second housing has two second surfaces and two second connecting surfaces. The two second surfaces are spaced apart along the front-back direction of the power tool, and the two second connecting surfaces are spaced apart along the left-right direction of the power tool. The unfilled area is provided between the first surface and the second surface, and the filled area is provided between the first connecting surface and the second connecting surface.

14. The power tool according to claim 1, characterized in that, The power tool also includes a terminal block, which is connected between the first part and the second part and spaced apart from the first housing. Both the first part and the second part are provided with guide rails, the battery pack is slidable along the guide rails, and the terminals on the battery pack are detachably connected to the terminal block.

15. The power tool according to claim 1, characterized in that, The first housing includes a main housing and a handle. The main housing is located at the first end of the handle, the connecting part is located at the second end of the handle, and the motor is housed within the main housing.

16. The power tool according to claim 15, characterized in that, The second end of the handle is provided with a base. The left and right direction of the power tool is taken as the left and right direction when the user holds the power tool, and the front and back direction is taken as the insertion and removal direction of the battery pack. The maximum size of the base in the front and back direction is greater than the maximum size of the handle in the front and back direction. The maximum size of the base in the left and right direction is greater than the maximum size of the handle in the left and right direction. The connecting part is provided on the side of the base away from the handle.

17. The power tool according to claim 16, characterized in that, The bottom surface of the base is spaced apart from the top surface of the second housing to form a second gap that allows the second housing to move. The second gap is annular and communicates with the first gap.

18. The power tool according to claim 16, characterized in that, The base contains a first circuit board.

19. The power tool according to claim 15, characterized in that, The handle contains a second circuit board.

20. The power tool according to claim 1, characterized in that, The first part and the second part are provided with bolt mounting portions protruding from their outer surfaces. The second housing also includes bolts, which pass through the bolt mounting portions to fix the first part and the second part together.

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