CN115946082A

CN115946082A - Electric tool

Info

Publication number: CN115946082A
Application number: CN202211509744.7A
Authority: CN
Inventors: 方鸿儒; 王革
Original assignee: Jiangsu Dartek Technology Co Ltd
Current assignee: Jiangsu Dartek Technology Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-04-11

Abstract

The application relates to an electric tool supplies power through power supply module, specifically includes: a motor driven by a power supply assembly; a housing for accommodating the motor; the power supply connecting part is provided with a wiring terminal which is electrically connected with the power supply assembly and can transfer the energy in the power supply assembly to the motor; the casing is equipped with first supporting part, the power connecting portion are equipped with the second supporting part, be provided with shock absorber between first supporting part and the second supporting part. Thereby reducing the transmission of vibration on the case to the battery connecting portion and reducing the probability of poor contact of the terminal.

Description

Electric tool

Technical Field

The present application relates to the field of tool technology, and more particularly to power tools.

Background

With the development of tool technology, a technology of operating with an electric driving tool appears, and the technology of operating with the electric driving tool makes the tool more convenient and fast to use, so that the tool is favored by construction operators.

In the related art, in order to further improve portability, a battery pack having a power storage function is often used to supply power to the electric power tool, thereby driving the electric power tool. For example, chinese patent publication No. CN108340322A discloses a power tool, especially an electric impact wrench, which includes: the motor comprises a motor, an output shaft, an impact device, a clutch and a shell, wherein the output shaft is used for outputting torque, the impact device is used for driving the output shaft in an impact mode, the clutch is used for transmitting the power of the motor to the impact device, and the shell forms a containing cavity for containing the motor and the clutch; wherein, the clutch includes: the driving part can be driven by the motor to rotate around a central axis, the driven part is in contact with the driving part and can synchronously rotate along with the driving part, and the driven part is separated from synchronous rotation along with the driving part when the impact device impacts; the driving member or the driven member is made of at least a material containing a metal element. The motor also comprises a battery pack and a gear box, wherein the battery pack is detachably connected with the shell and is used for providing electric energy for the motor; a gearbox is disposed between the motor and the impact device for reducing the rotational speed of the motor output to the impact device.

However, the vibration generated during the operation of the current electric tool is transferred to the connection between the terminals of the electric tool and the terminals of the battery pack, which results in poor contact between the battery pack and the terminals of the battery pack.

Disclosure of Invention

In view of the above, it is desirable to provide an electric power tool that addresses the problem of electric power tool vibration.

In order to solve the technical problem, the present application is implemented as follows:

in one embodiment, there is provided a power tool powered by a power supply assembly, comprising:

a motor driven by a power supply assembly;

a housing for accommodating the motor;

the power supply connecting part is provided with a wiring terminal which is electrically connected with the power supply assembly and can transfer the energy in the power supply assembly to the motor;

the casing is equipped with first supporting part, the power connecting portion are equipped with the second supporting part, be provided with shock absorber between first supporting part and the second supporting part.

Optionally, the support device further comprises a support part, and the first support part and the second support part are connected through the support part.

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

In another alternative embodiment, the support portion is disposed on the first support portion, the second support portion and/or the shock absorbing member, at least one of the first support portion, the second support portion and the shock absorbing member is provided with a relief portion for the support portion to be inserted, the shock absorbing member is disposed around a peripheral wall of the support portion, and the support portion penetrates through the shock absorbing member.

In another alternative embodiment, the support portion is provided on one of the first support portion and the second support portion, and the relief portion is provided on the other of the first support portion and the second support portion, and the support portion is inserted into the relief portion through the shock absorbing member.

In another optional embodiment, the first supporting part and the second supporting part are provided with a position yielding part, the supporting part is inserted in the shock absorption member, and the extending end part of the supporting part is inserted in the position yielding part.

In another optional embodiment, the supporting portion is made of a material with elastic properties, the supporting portion is in clearance fit with the yielding portion, and when the second supporting portion is displaced in at least a vertical direction relative to the first supporting portion, the supporting portion can be elastically deformed to be reset.

In another alternative embodiment, the support portion is provided integrally with the shock absorber; the support part is provided with a reinforcing rib, and the length direction of the reinforcing rib is approximately parallel to the extending direction of the support part.

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 shock absorbing member, the two supporting portions are commonly inserted into the same supporting hole, and the two supporting portions are connected through the shock absorbing member.

In another optional embodiment, a yielding gap is arranged between the supporting part and the inner wall of the yielding part, and the distance of the yielding gap in the length direction of the supporting part is greater than or equal to the maximum deformation distance of the shock absorbing part in the length direction of the supporting part.

In the embodiment of the application, the vibration absorbing member is arranged between the first supporting part of the shell and the second supporting part of the power supply connecting part, and the vibration absorbing member can be pressed when the first supporting part is displaced relative to the second supporting part, so that the vibration between the first supporting part and the second supporting part is buffered, the vibration on the shell is reduced to be transmitted to the battery connecting part, and the probability of poor contact of the wiring terminal is reduced.

Drawings

Fig. 1 is an overall schematic view of a power tool according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of the housing and power module connection in one embodiment of the present application;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of a connection portion between a first supporting portion and a second supporting portion according to another embodiment of the present disclosure;

FIG. 5 is a schematic view of a connection between a first support part and a second support part according to another embodiment of the present disclosure;

FIG. 6 is a schematic view of a connection portion between a first supporting portion and a second supporting portion according to another embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a joint between a first supporting portion and a second supporting portion in another embodiment of the present application.

Description of the drawings: 1. a housing; 11. a motor; 12. a first support section; 2. a power supply connection part; 20. a wiring terminal; 21. a power supply component; 22. a second support portion; 3. a shock absorbing member; 4. a support portion; 5. a bit escape part; 6. a abdication gap; 7. and (7) reinforcing ribs.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 shows an overall schematic view of an electric tool in an embodiment of the present application, and an embodiment of the present application provides an electric tool including a housing 1, a motor 11, and a power connection portion 2, where the motor 11 is installed inside the housing 1 to provide power for the electric tool. The housing 1 extends downward to form a handle portion for holding, and the power supply connection portion 2 is mounted at the bottom of the handle portion of the housing 1.

Referring to fig. 2, fig. 2 is a structural sectional view of a connection between a housing and a power supply module according to an embodiment of the present application; the power supply connection portion 2 is provided with a connection terminal 20, the connection terminal 20 is used to electrically connect to a power supply module 21, and the power supply module 21 may be a device for storing electric energy such as a battery pack. The terminals 20 transfer energy from the power module 21 to the motor 11 to drive the motor 11 to power the power tool.

The housing 1 has a first supporting portion 12 formed therein, the first supporting portion 12 may be located at an end of the handle portion away from the motor 11, and the first supporting portion 12 may be a part of the housing 1 or an auxiliary fixing member installed in the housing 1. The second support portion 22 is formed in the power supply connection portion 2, and the second support portion 22 may be a part of the power supply connection portion 2, and may be provided separately, and the power supply connection portion 2 may be connected to the case 1 via the first support portion 12 and the second support portion 22.

The shock absorbing member 3 is arranged between the first supporting part 12 and the second supporting part 22, the shock absorbing member 3 is made of an elastic deformation material, can deform when stressed, and automatically recovers after external force is removed, so that the impact and the force received by the shock absorbing member are buffered. When the shock absorbing member 3 is mounted between the first supporting portion 12 and the second supporting portion 22, the shock absorbing member 3 can be abutted against the first supporting portion 12 and the second supporting portion 22, respectively, so that the power supply connecting portion 2 can be fixed in the case 1 by the frictional force between the shock absorbing member 3 and the first supporting portion 12 and the second supporting portion 22.

Referring to fig. 3, fig. 3 is an enlarged view of the connection between the housing and the power supply module according to an embodiment of the present invention, in order to more reliably limit the relative positions of the housing 1 and the power supply connection portion 2, the power tool may further include a support portion 4, and the first support portion 12 and the second support portion 22 may be connected by the support portion 4. The length direction of the support portion 4 may be perpendicular to the extending 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 with the fixation by means of friction force, the connection between the first support part 12 and the second support part 22 through the support part 4 is performed, so that when the first support part 12 and the second support part 22 move relatively, shearing force is exerted on the support part 4, and the possibility that the first support part 12 and the second support part 22 are separated is reduced.

When the first support portion 12 and the second support portion 22 are connected by the support portion 4, if the second support portion 22 is displaced in a direction substantially perpendicular to the support portion with respect to the first support portion 12; at this time, the second supporting portion 22 generates a shearing force along a direction perpendicular to the length direction of the supporting portion, and the shearing force is at least partially borne by the supporting portion 4, so that the position of the power supply connecting portion 2 in the vertical direction is limited, and the stability of fixing the power supply connecting portion 2 is improved.

When the first support portion 12 and the second support portion 22 are fixed, the support portion 4 may be provided on the first support portion 12, the support portion 4 may be integrally formed on the first support portion 12, or may be fixed to the first support portion 12 by other means such as bolts or bonding. The second support part 22 is provided with a positioning part 5, and the support part 4 protrudes from the surface of the elastic member and is inserted into the positioning part 5. In the present embodiment, the relief portion 5 may be a blind hole through which the insertion is possible, and the support portion 4 may be inserted through the surface of the shock absorbing member 3 and into the relief portion 5, thereby connecting the first support portion 12 and the second support portion 22 together and suppressing the relative displacement of the first support portion 12 and the second support portion 22.

The shock absorbing members 3 may be elastic blocks uniformly distributed along a circumference of the case 1, in which case a plurality of shock absorbing members 3 may be provided, and a plurality of shock absorbing members 3 may be uniformly provided around a circumference of a circumferential wall of the supporting portion 4; and the support portion 4 may be inserted in the letting-down portion 5 after penetrating the entire shock-absorbing member 3. Of course, the shock absorbing member 3 may also be a whole that is disposed around the housing 1, at this time, through holes for the support portions 4 to be inserted are uniformly formed on the shock absorbing member 3, and the end portions of the support portions 4 penetrate through the through holes to be inserted into the positioning portions 5. The through holes formed in the shock absorbers 3 enable the deformation degree of the shock absorbers 3 in the length direction of the supporting parts 4 to be consistent, and the shock absorbers 3 are prevented from being reduced in durability due to stress concentration.

The support portion 4 may be inserted in the positioning portion 5 with a clearance fit, that is, a clearance exists between the peripheral wall of the support portion 4 and the inner wall of the positioning portion 5 surrounding the peripheral wall of the support portion 4, where the peripheral wall refers to a surface or surfaces excluding the end walls at both ends in the length direction of the support portion 4. The friction force of the first support part 12 and the second support part 22 relative to the shock absorbing member 3 buffers the force applied to the support part 4 in the direction perpendicular to the support part 4; when the acting force between the first support portion 12 with respect to the second support portion 22 is equal to or less than the resultant force of the static friction force between the first support portion 12 and the second support portion 22 with respect to the shock absorbing member 3, the acting force between the first support portion 12 with respect to the second support portion 22 and the resultant force of the static friction force cancel out; when the acting force between the first supporting portion 12 and the second supporting portion 22 is larger than the resultant force of the static friction between the first supporting portion 12 and the second supporting portion 22 and the shock absorbing member 3, the relative displacement between the first supporting portion 12 and the second supporting portion 22 is limited by the supporting portion 4 and the relief hole, and the movement of the supporting portion 4 is retarded by the resultant force of the friction. When the second supporting portion 22 generates an oblique impact with respect to the first supporting portion 12, the supporting portion 4 can be deflected while the second supporting portion 22 presses the shock absorbing member 3, and thus the impact can be buffered.

The support portion 4 may be made of an elastic material so that the force of elastic deformation thereof may be greater than the force of elastic deformation of the shock-absorbing member 3. When the support portion 4 is subjected to a large shearing force in the longitudinal direction thereof, the shearing force can be applied to the support portion 4 to elastically deform it, thereby buffering the force that causes the relative displacement of the first support portion 12 and the second support portion 22.

An abdicating gap 6 is provided between the support part 4 and the inner wall of the abdicating part 5, and the abdicating gap 6 may be located at the end of the support part 4 remote from the second support part 22. The distance of the abdicating gap 6 along the length direction of the supporting part 4 is greater than or equal to the maximum deformation distance of the shock absorbing part 3 along the length direction of the supporting part 4, so that the shock absorbing part 3 can be sufficiently deformed to sufficiently buffer the relative displacement between the first supporting part 12 and the second supporting part 22.

Referring to fig. 4, fig. 4 is a schematic view showing a matching of the first supporting portion 12 and the second supporting portion 22 of the power tool in another embodiment of the present application, in some embodiments, the first supporting portion 12 and the second supporting portion 22 may be respectively provided with the positioning portion 5, and the supporting portion 4 may be inserted into the shock absorbing member 3 and both ends of the supporting portion may extend out of the shock absorbing member 3. The end portion of the supporting portion 4 from which the shock-absorbing member 3 extends may be inserted in the letting portion 5, thereby connecting the first supporting portion 12 and the second supporting portion 22.

The abdicating gap 6 at this time may be located at the end of the support part 4, and the distance of the two abdicating gaps 6 in the length direction of the support part 4 and the maximum deformation distance of the shock-absorbing member 3 in the length direction of the support part 4 may be equal to or greater than each other. The end portions of the support portion 4 extending out of the shock absorbing member 3 may be symmetrically disposed with respect to the center of the support portion 4, thereby maintaining the balance of the damping force on both sides of the shock absorbing member 3.

Referring to fig. 5, fig. 5 shows a schematic view of the first supporting portion 12 and the second supporting portion 22 of the power tool according to another embodiment of the present invention, however, it can be understood that the supporting portion 4 may be integrally formed with the shock absorbing member 3, and a cross body with a cross-shaped end surface may be formed to facilitate the assembly and force balance of the shock absorbing member 3.

Referring to fig. 6, fig. 6 is a schematic view showing the matching of the first supporting portion 12 and the second supporting portion 22 of the power tool according to another embodiment of the present invention, a reinforcing rib 7 may be embedded in the supporting portion 4, and the reinforcing rib 7 may be made of a hard material and embedded in the center of the supporting portion 4 during the forming process of the shock absorbing member 3, so as to improve the reliability of the connection between the first supporting portion 12 and the second supporting portion 22.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating the matching of the first support part 12 and the second support part 22 of the power tool according to another embodiment of the present application, in some embodiments, the first support part 12 and the second support part 22 may be formed with the support part 4; let the position portion 5 can set up in the middle part of shock-absorbing piece 3, let the position portion 5 can be the through-hole to it is even to maintain the atress of shock-absorbing piece 3. When letting position portion 5 be the through-hole, shock absorbing piece 3 thickness is even, consequently all easily takes place deformation along through-hole length direction's every position, can not lead to shock absorbing piece 3's deformation stress concentration in a certain point, therefore shock absorbing piece 3 atress is even.

At this time, the yielding gaps 6 at the end portions of the two support portions 4 may be one, the support portions 4 may be fittingly inserted into the yielding portion 5, or may be inserted into the yielding portion 5 in a clearance fit or interference fit manner, and the clearance fit may increase the moving range of the support portions 4 in the yielding portion 5, so as to further facilitate damping of vibration. The embodiment of the application is preferably in interference fit, so that the contact area between the supporting part 4 and the shock absorbing part 3 can be increased, and the shock can be buffered more conveniently.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A power tool supplied with power by a power supply module (21), comprising:

a motor (11) driven by a power supply unit (21);

a housing (1) for accommodating the electric motor (11);

a power supply connection unit (2) provided with a connection terminal (20) which is electrically connected to the power supply module (21) and which is capable of transmitting energy in the power supply module (21) to the motor (11);

the shell (1) is provided with a first supporting part (12), the power supply connecting part (2) is provided with a second supporting part (22), and a vibration absorbing part (3) is arranged between the first supporting part (12) and the second supporting part (22).

2. The power tool according to claim 1, further comprising a support portion (4), the first support portion (12) and the second support portion (22) being connected by the support portion (4).

3. The power tool according to claim 1, further comprising a support portion (4), wherein a shearing force of the second support portion (22) relative to the first support portion (12) in a direction perpendicular to the length direction of the support portion (4) is at least partially supported by the support portion (4) when the second support portion (22) moves relative to the first support portion (12) in a direction substantially perpendicular to the length direction of the support portion (4).

4. The electric tool according to claim 2 or 3, characterized in that the support portion (4) is provided on a first support portion (12), a second support portion (22) and/or a shock absorbing member (3), at least one of the first support portion (12), the second support portion (22) and the shock absorbing member (3) is provided with a relief portion (5) for the support portion (4) to be inserted, the shock absorbing member (3) is provided around a peripheral wall of the support portion (4) and the support portion (4) penetrates the shock absorbing member (3).

5. The electric power tool according to claim 4, wherein the support portion (4) is located on one of the first support portion (12) or the second support portion (22), the relief portion (5) is provided on the other of the first support portion and the second support portion, and the support portion (4) is inserted into the relief portion (5) through the shock absorbing member (3).

6. The power tool according to claim 4, wherein the first support portion (12) and the second support portion (22) are each provided with a relief portion (5), the support portion (4) is inserted in the shock absorbing member (3), and an end portion from which the support portion (4) extends is inserted in the relief portion (5).

7. A tool according to claim 5 or 6, wherein the support portion (4) is of a resilient material, the support portion (4) being a clearance fit with the relief portion (5), the support portion (4) being resiliently deformable to return when the second support portion (22) is displaced in at least a vertical direction relative to the first support portion (12).

8. The power tool according to claim 7, wherein the support portion (4) is provided integrally with a shock absorbing member (3); and reinforcing ribs (7) are arranged in the supporting part (4), and the length direction of each reinforcing rib (7) is approximately parallel to the extending direction of the supporting part (4).

9. The electric tool according to claim 4, wherein the first support portion (12) and the second support portion (22) are provided with a support portion (4), respectively, the support holes are provided on a shock absorbing member (3), the two support portions (4) are commonly inserted in the same support hole, and the two support portions (4) are connected by the shock absorbing member (3).

10. The electric tool according to claim 4, wherein a yielding gap (6) is arranged between the supporting part (4) and the inner wall of the yielding part (5), and the distance of the yielding gap (6) along the length direction of the supporting part (4) is greater than or equal to the maximum deformation distance of the shock absorbing part (3) along the length direction of the supporting part (4).