A power tool

Abstract

The application relates to an electric power tool, which is powered by a power supply assembly, and specifically comprises: a motor driven by the power supply assembly; a shell used for accommodating the motor; and a power supply connecting part provided with a terminal connected to the power supply assembly and capable of transmitting the energy in the power supply assembly to the motor; the shell is provided with a first supporting part, the power supply connecting part is provided with a second supporting part, and a vibration absorbing piece is arranged between the first supporting part and the second supporting part. Therefore, the vibration on the shell is reduced to be transmitted to the battery connecting part, and the probability of poor contact of the terminal is reduced.

Description

Technical Field

[0001] The present application relates to the field of tool technology, in particular to electric tools. Background Art

[0002] With the development of tool technology, the technology of electrically driving tools has emerged. The technology of electrically driving power tools makes the use of tools more convenient and efficient, and is therefore favored by the majority of construction workers.

[0003] In related art, to further enhance portability, battery packs with power storage functions are often used to power power tools, thereby driving their operation. For example, Chinese Patent Publication No. CN108340322A discloses a power tool, particularly an electric impact wrench, comprising a motor, an output shaft, an impact mechanism, a clutch, and a housing. The output shaft is configured to output torque, the impact mechanism is configured to drive the output shaft in an impacting manner, and the clutch is configured to transmit power from the motor to the impact mechanism. The housing forms a chamber for accommodating the motor and the clutch. The clutch comprises a driving member and a driven member, wherein the driving member is driven by the motor to rotate about a central axis, the driven member contacts the driving member and is configured to rotate synchronously with the driving member, and the driven member disengages from synchronous rotation with the driving member when the impact mechanism impacts the tool. The driving member or the driven member is made of at least one material containing a metal element. The tool also comprises a battery pack and a gearbox, which are detachably connected to the housing to supply power to the motor. The gearbox is disposed between the motor and the impact mechanism and is configured to reduce the rotational speed of the output from the motor to the impact mechanism.

[0004] However, current power tools generate vibrations during operation. The vibrations are transmitted to the connection points between the power tool terminals and the battery pack terminals, resulting in poor contact of the battery pack. Therefore, there is room for improvement. Summary of the Invention

[0005] Based on this, it is necessary to provide an electric tool to address the vibration problem of the electric tool.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In one embodiment, a power tool is provided, which is powered by a power supply assembly and includes:

[0008] a motor, driven by a power supply assembly;

[0009] a housing for accommodating the motor;

[0010] A power connection portion, provided with a terminal electrically connected to the power assembly and capable of transferring energy in the power assembly to the motor;

[0011] The housing is provided with a first supporting portion, the power connection portion is provided with a second supporting portion, and a vibration absorber is provided between the first supporting portion and the second supporting portion.

[0012] Optionally, a support portion is further included, and the first support portion and the second support portion are connected through the support portion.

[0013] Optionally, a support portion is further included, and when the second support portion moves relative to the first support portion in a length direction substantially perpendicular to the support portion, the shear force of the second support portion relative to the first support portion in a length direction perpendicular to the support portion is at least partially supported by the support portion.

[0014] In another optional embodiment, the support portion is arranged on the first support portion, the second support portion and / or the vibration absorber, and at least one of the first support portion, the second support portion and the vibration absorber is provided with a yield portion for inserting the support portion, the vibration absorber is arranged around the peripheral wall of the support portion and the support portion passes through the vibration absorber.

[0015] In another optional embodiment, the supporting portion is located on one of the first supporting portion or the second supporting portion, the giving way portion is provided on the other of the first and second supporting portions, and the supporting portion is inserted into the giving way portion through the vibration absorber.

[0016] In another optional embodiment, both the first supporting portion and the second supporting portion are provided with a yielding portion, the supporting portion is inserted into the vibration absorbing member, and the end portion extending from the supporting portion is inserted into the yielding portion.

[0017] In another optional embodiment, the support portion is made of a material with elastic properties, and the support portion is clearance-matched with the yield portion. When the second support portion is displaced relative to the first support portion in at least a vertical direction, the support portion can undergo elastic deformation for restoration.

[0018] In another optional embodiment, the support portion and the vibration absorber are integrally formed; a reinforcing rib is provided in the support portion, and a length direction of the reinforcing rib is substantially parallel to an extension direction of the support portion.

[0019] In another optional embodiment, the first supporting portion and the second supporting portion are respectively provided with a supporting portion, the supporting hole is located on the vibration absorber, the two supporting portions are inserted into the same supporting hole, and the two supporting portions are connected through the vibration absorber.

[0020] In another optional embodiment, a clearance gap is provided between the support portion and the inner wall of the clearance portion, and the distance of the clearance gap along the length direction of the support portion is greater than or equal to the maximum deformation distance of the vibration absorber along the length direction of the support portion.

[0021] In an embodiment of the present application, a vibration absorber is provided between the first supporting portion of the shell and the second supporting portion of the power connection portion. The vibration absorber can be squeezed when the first supporting portion is displaced relative to the second supporting portion, thereby buffering the vibration between the first supporting portion and the second supporting portion, reducing the vibration on the shell from being transmitted to the battery connection portion, and thus reducing the probability of poor contact of the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an overall schematic diagram of a power tool in an embodiment of the present application;

[0023] Figure 2 This is a cross-sectional view of the structure of the connection between the housing and the power supply assembly in one embodiment of the present application;

[0024] Figure 3 for Figure 2 A magnified schematic diagram of the structure at center A;

[0025] Figure 4 This is a schematic structural diagram of the connection between the first supporting portion and the second supporting portion in another embodiment of the present application;

[0026] Figure 5 This is a schematic structural diagram of the connection between the first supporting portion and the second supporting portion in another embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of the connection between the first supporting portion and the second supporting portion in another embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of the structure of the connection between the first supporting portion and the second supporting portion in another embodiment of the present application.

[0029] Description of the drawings: 1. Housing; 11. Motor; 12. First supporting part; 2. Power connection part; 20. Terminal block; 21. Power assembly; 22. Second supporting part; 3. Vibration absorber; 4. Support part; 5. Clearance part; 6. Clearance gap; 7. Reinforcement rib. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] See Figure 1 , Figure 1 FIG2 shows an overall schematic diagram of a power tool according to an embodiment of the present application. The power tool includes a housing 1, a motor 11, and a power connection portion 2. The motor 11 is mounted within the housing 1 to provide power to the power tool. A handle portion extends downward from the housing 1 for gripping, and the power connection portion 2 can be mounted at the bottom of the handle portion of the housing 1.

[0037] See Figure 2 , Figure 2 A cross-sectional view of the connection between the housing and the power supply assembly in one embodiment of the present application is shown. The power connection portion 2 is provided with a terminal block 20 for electrically connecting to a power supply assembly 21, which can be a device storing electrical energy, such as a battery pack. The terminal block 20 transfers energy from the power supply assembly 21 to the motor 11, thereby driving the motor 11 to power the power tool.

[0038] A first supporting portion 12 is formed in the housing 1. The first supporting portion 12 can be located at the end of the handle away from the motor 11. The first supporting portion 12 can be a part of the housing 1 or an auxiliary fixing member installed in the housing 1. The power connection portion 2 is formed with a second supporting portion 22. The second supporting portion 22 can also be a part of the power connection portion 2 or can be provided separately. The power connection portion 2 can be connected to the housing 1 via the first supporting portion 12 and the second supporting portion 22.

[0039] A vibration absorber 3 is disposed between the first support portion 12 and the second support portion 22. The vibration absorber 3 is made of an elastically deformable material and deforms when subjected to force. It then automatically returns to its original shape when the force is removed, thereby buffering the impact and force received. When the vibration absorber 3 is installed between the first support portion 12 and the second support portion 22, it abuts against the first support portion 12 and the second support portion 22, respectively. This allows the power connector 2 to be secured within the housing 1 through friction between the vibration absorber 3 and the first and second support portions 12, 22.

[0040] See Figure 3 , Figure 3An enlarged view of the connection between the housing and the power supply assembly in one embodiment of the present application is shown. In order to more reliably limit the relative position of the housing 1 and the power connection portion 2, the above-mentioned power tool may further include a support portion 4, through which the first support portion 12 and the second support portion 22 can be connected. The length direction of the support portion 4 can be perpendicular to the extension direction of the first support portion 12, thereby improving the stability of the connection between the first support portion 12 and the second support portion 22. Compared to fixing entirely by friction, the first support portion 12 and the second support portion 22 are connected by the support portion 4, so that when the first support portion 12 and the second support portion 22 move relative to each other, a shear force is applied to the support portion 4, thereby reducing the possibility of separation between the first support portion 12 and the second support portion 22.

[0041] When the first supporting portion 12 and the second supporting portion 22 are connected through the supporting portion 4, if the second supporting portion 22 is displaced relative to the first supporting portion 12 in a direction approximately perpendicular to the supporting portion; at this time, the second supporting portion 22 will generate a shear force along the length direction perpendicular to the supporting portion, and this shear force is at least partially borne by the supporting portion 4, thereby limiting the position of the power connection portion 2 in the vertical direction and improving the stability of the fixation of the power connection portion 2.

[0042] When the first support portion 12 and the second support portion 22 are fixed, the support portion 4 can be disposed on the first support portion 12. The support portion 4 can be integrally formed on the first support portion 12, or it can be fixed to the first support portion 12 by bolts, bonding, or other means. A relief portion 5 is provided on the second support portion 22. The support portion 4 protrudes from the surface of the elastic member and is inserted into the relief portion 5. In this embodiment, the relief portion 5 can be a blind hole for insertion. The support portion 4 can pass through the surface of the vibration absorber 3 and be inserted into the relief portion 5, thereby connecting the first support portion 12 and the second support portion 22 together and preventing relative displacement between the first support portion 12 and the second support portion 22.

[0043] The vibration absorber 3 can be an elastic block evenly distributed along the circumference of the housing 1. In this case, multiple vibration absorbers 3 can be provided, and these multiple vibration absorbers 3 can be evenly arranged around the circumference of the support portion 4. The support portion 4 can also extend through the entire vibration absorber 3 and then be inserted into the clearance portion 5. Of course, the vibration absorber 3 can also be a single unit arranged around the circumference of the housing 1. In this case, through-holes for inserting the support portion 4 are evenly distributed in the vibration absorber 3. The ends of the support portion 4 are inserted through the through-holes and into the clearance portion 5. The through-holes in the vibration absorber 3 ensure that the vibration absorber 3 has a uniform degree of deformation along the length of the support portion 4, preventing stress concentration that may reduce the durability of the vibration absorber 3.

[0044] The support portion 4 can be inserted into the clearance portion 5 with a clearance fit, that is, there is a gap between the peripheral wall of the support portion 4 and the inner wall of the clearance portion 5 surrounding the peripheral wall of the support portion 4. The peripheral wall here refers to one or more surfaces other than the end walls of the support portion 4 in the longitudinal direction. The friction force of the first support portion 12 and the second support portion 22 relative to the vibration absorber 3 buffers the force applied to the support portion 4 in the direction perpendicular to the support portion 4; when the force between the first support portion 12 and the second support portion 22 is less than or equal to the static friction force between the first support portion 12 and the second support portion 22 relative to the vibration absorber 3, the force between the first support portion 12 and the second support portion 22 and the static friction force cancel each other out; when the force between the first support portion 12 and the second support portion 22 is greater than the static friction force between the first support portion 12 and the second support portion 22 relative to the vibration absorber 3, the relative displacement between the first support portion 12 and the second support portion 22 is limited by the support portion 4 and the clearance hole, and the friction force blocks the movement of the support portion 4. When the second support portion 22 is subjected to an oblique impact relative to the first support portion 12 , the second support portion 22 presses the vibration absorber 3 while the support portion 4 is deflected, thereby buffering the impact.

[0045] The support portion 4 may be made of an elastic material so that the force of its elastic deformation can be greater than the force causing the elastic deformation of the vibration absorber 3. When the support portion 4 is subjected to a large shear force along its length, the shear force can be applied to the support portion 4, causing it to elastically deform, thereby buffering the force that causes the relative displacement of the first support portion 12 and the second support portion 22.

[0046] A clearance gap 6 is provided between the inner walls of the support portion 4 and the clearance portion 5. The clearance gap 6 can be located at the end of the support portion 4 away from the second support portion 22. The distance of the clearance gap 6 along the length of the support portion 4 is greater than or equal to the maximum deformation distance of the vibration absorber 3 along the length of the support portion 4, allowing the vibration absorber 3 to fully deform and adequately buffer the relative displacement between the first support portion 12 and the second support portion 22.

[0047] See Figure 4 , Figure 4 A schematic diagram illustrating the coordination of the first supporting portion 12 and the second supporting portion 22 of a power tool in another embodiment of the present application is shown. In some embodiments, a relief portion 5 can be provided on each of the first supporting portion 12 and the second supporting portion 22, and the support portion 4 can be inserted into the vibration absorber 3 and extend from the vibration absorber 3 at both ends. The end of the support portion 4 extending from the vibration absorber 3 can be inserted into the relief portion 5, thereby connecting the first supporting portion 12 and the second supporting portion 22.

[0048] In this case, the clearance gaps 6 can be located at the ends of the support portion 4, and the sum of the distances of the two clearance gaps 6 along the length of the support portion 4 can be greater than or equal to the maximum deformation distance of the vibration absorber 3 along the length of the support portion 4. The ends of the support portion 4 extending from the vibration absorber 3 can be symmetrically arranged relative to the center of the support portion 4, thereby maintaining a balanced buffering force on both sides of the vibration absorber 3.

[0049] See Figure 5 , Figure 5 A brief schematic diagram of the cooperation between the first supporting part 12 and the second supporting part 22 of the electric tool in another embodiment of the present application is shown. Of course, it can be understood that the support part 4 can be integrally formed with the vibration absorber 3 to form a cross body with a "cross" end face to facilitate the assembly and force balance of the vibration absorber 3.

[0050] See Figure 6 , Figure 6 A brief schematic diagram of the cooperation between the first supporting part 12 and the second supporting part 22 of the electric tool in another embodiment of the present application is shown. A reinforcing rib 7 can be embedded in the supporting part 4. The reinforcing rib 7 can be made of hard material and is embedded in the center position of the supporting part 4 during the molding process of the vibration absorber 3, thereby improving the reliability of the connection between the first supporting part 12 and the second supporting part 22.

[0051] See Figure 7 , Figure 7 A schematic diagram illustrating the coordination of the first supporting portion 12 and the second supporting portion 22 of a power tool in another embodiment of the present application is shown. In some embodiments, both the first supporting portion 12 and the second supporting portion 22 may be formed with a support portion 4. A relief portion 5 may be provided in the middle of the vibration absorber 3. The relief portion 5 may be a through hole to maintain uniform force distribution on the vibration absorber 3. When the relief portion 5 is a through hole, the vibration absorber 3 has a uniform thickness, allowing deformation to occur easily at every location along the length of the through hole. This prevents deformation stress from being concentrated at a single point on the vibration absorber 3, resulting in a uniform force distribution on the vibration absorber 3.

[0052] At this time, the clearance gap 6 at the ends of the two support parts 4 can be one, and the support part 4 can be inserted into the clearance part 5 in an adaptive manner, or can be inserted into the clearance part 5 with a clearance fit or an interference fit. The clearance fit can expand the range of movement of the support part 4 in the clearance part 5, making it easier to buffer vibration. The embodiment of the present application preferably uses an interference fit, which can increase the contact area between the support part 4 and the vibration absorber 3, making it easier to buffer vibration.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An electric tool, which is powered by a power supply assembly (21), characterized in that: include: A motor (11) driven by a power supply assembly (21); A housing (1) for accommodating the motor (11); A power connection portion (2) is provided with a connection terminal (20) electrically connected to the power component (21) and capable of transmitting energy in the power component (21) to the motor (11); The housing (1) is provided with a first supporting portion (12), the power connection portion (2) is provided with a second supporting portion (22), a vibration absorbing member (3) is provided between the first supporting portion (12) and the second supporting portion (22), and the vibration absorbing member (3) abuts against the first supporting portion (12) and the second supporting portion (22) respectively; The device further comprises a support portion (4), wherein when the second support portion (22) moves relative to the first support portion (12) in a longitudinal direction perpendicular to the support portion (4), a shear force of the second support portion (22) relative to the first support portion (12) in a longitudinal direction perpendicular to the support portion (4) is at least partially supported by the support portion (4); The support portion (4) is arranged on the first support portion (12), the second support portion (22) and / or the vibration absorber (3); at least one of the first support portion (12), the second support portion (22) and the vibration absorber (3) is provided with a clearance portion (5) for inserting the support portion (4); the vibration absorber (3) is arranged around the peripheral wall of the support portion (4) and the support portion (4) passes through the vibration absorber (3).

2. The electric tool according to claim 1, wherein: The first supporting portion (12) and the second supporting portion (22) are connected via a supporting portion (4).

3. The electric tool according to claim 1, wherein: The support portion (4) is located on one of the first support portion (12) or the second support portion (22), the relinquishing portion (5) is arranged on the other of the two, and the support portion (4) passes through the vibration absorber (3) and is inserted into the relinquishing portion (5).

4. The electric tool according to claim 1, wherein: The first supporting portion (12) and the second supporting portion (22) are both provided with a yielding portion (5), the supporting portion (4) is inserted into the vibration absorbing member (3), and the end portion extending from the supporting portion (4) is inserted into the yielding portion (5).

5. The electric tool according to claim 3 or 4, characterized in that: The support portion (4) is made of a material with elastic properties, and the support portion (4) is clearance-matched with the retracting portion (5). When the second support portion (22) is displaced relative to the first support portion (12) in at least a vertical direction, the support portion (4) is capable of elastically deforming to reset.

6. The electric tool according to claim 5, wherein: The support portion (4) and the vibration absorber (3) are integrally formed; a reinforcing rib (7) is provided in the support portion (4), and the length direction of the reinforcing rib (7) is substantially parallel to the extension direction of the support portion (4).

7. The electric tool according to claim 1, wherein: The first supporting portion (12) and the second supporting portion (22) are respectively provided with a supporting portion (4); the giving portion (5) is located on the vibration absorbing member (3); the two supporting portions (4) are inserted into the same giving portion (5); and the two supporting portions (4) are connected via the vibration absorbing member (3).

8. The electric tool according to claim 1, wherein: A clearance gap (6) is provided between the support portion (4) and the inner wall of the clearance portion (5), and the distance of the clearance gap (6) along the length direction of the support portion (4) is greater than or equal to the maximum deformation distance of the vibration absorber (3) along the length direction of the support portion (4).

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