CN109128287B

CN109128287B - Power tool

Info

Publication number: CN109128287B
Application number: CN201710453763.5A
Authority: CN
Inventors: 孙开军; 徐俊华; 刘瑞峰
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2017-06-15
Filing date: 2017-06-15
Publication date: 2020-07-14
Anticipated expiration: 2037-06-15
Also published as: CN109128287A

Abstract

The invention relates to a power tool, which comprises a machine body and a balancing weight, wherein the machine body comprises a holding part and a rotary output part arranged at one end of the holding part, and the balancing weight is detachably arranged at one end, close to the rotary output part, of the holding part. The weight block is detachably arranged at one end, close to the rotary output part, of the power tool holding part, when heavy-load grinding is carried out, the weight block can be installed at the front end of the holding part, the weight of the whole machine is increased, the gravity center is moved forwards, force is applied by means of the gravity of the machine when grinding is carried out, and the labor-saving effect is achieved; can demolish the balancing weight when little load is polished (if the one hand grips), alleviate the load of during operation to alleviate operator's fatigue, raise the efficiency, so applicable in the operating mode of multiple difference, the operator of being convenient for uses, improves operator's use impression.

Description

Power tool

Technical Field

The invention relates to the technical field of hand-held tools, in particular to a power tool.

Background

The electric drill is a drilling machine using electricity as power, is a conventional product in electric tools, and is also an electric tool product with the largest demand.

At present, electric drill manufacturers push out series products with different powers, shapes and sizes, weights and rotating speeds so as to meet different working conditions and requirements. When light load is polished, a machine with light weight is needed to reduce the load during working, when heavy load is polished, the machine with light weight needs to be pressed down with force, the force is applied by the self weight of the machine, and for a user, a plurality of electric drills with different specifications need to be purchased to be suitable for various working conditions.

Disclosure of Invention

In view of the above, there is a need for a power tool that is adaptable to a variety of operating conditions.

A power tool comprises a machine body and a balancing weight, wherein the machine body comprises a holding part and a rotary output part arranged at one end of the holding part, and the balancing weight is detachably arranged at one end, close to the rotary output part, of the holding part.

The weight block is detachably arranged at one end, close to the rotary output part, of the power tool holding part, when heavy-load grinding is carried out, the weight block can be installed at the front end of the holding part, the weight of the whole machine is increased, the gravity center is moved forwards, force is applied by means of the gravity of the machine when grinding is carried out, and the labor-saving effect is achieved; can demolish the balancing weight when little load is polished (if the one hand grips), alleviate the load of during operation to alleviate operator's fatigue, raise the efficiency, so applicable in the operating mode of multiple difference, the operator of being convenient for uses, improves operator's use impression.

In one embodiment, the holding portion is provided with an air blowing opening, the counterweight block is provided with an air outlet, and the air outlet is communicated with the air blowing opening.

In one embodiment, the weight block is provided with an air outlet portion corresponding to the air blowing port, a certain gap is reserved between the air outlet portion and the holding portion to form an air passing channel, and the air outlet is communicated with the air passing channel and is arranged at one end, close to the rotary output portion, of the air outlet portion.

In one embodiment, the air outlet parts are positioned on two opposite sides of the longitudinal section of the holding part.

In one embodiment, the air outlet is obliquely arranged close to the rotary output part relative to the holding part.

In one embodiment, the weight block comprises a left weight block and a right weight block, and the left weight block and the right weight block are detachably connected and respectively coated on two opposite sides of the holding part.

In one embodiment, the left weight block and the right weight block are both semi-circular arc-shaped pieces, and the left weight block and the right weight block are butted to form a circular arc-shaped piece matched with the holding part.

In one embodiment, the left balancing weight and the right balancing weight are detachably connected through screws.

In one embodiment, the weight of the balancing weight is 250-350 g.

In one embodiment, the power tool is a power drill.

Drawings

Fig. 1 is a schematic structural diagram of a power tool according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the power tool of fig. 1 in one direction.

Fig. 3 is a schematic cross-sectional view of the power tool of fig. 1 in another direction.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" 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," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, a power tool 100 according to an embodiment of the present invention includes a body 10 and a weight 20, the body 10 includes a holding portion 12 and a rotation output portion 14 disposed at one end of the holding portion 12, and the weight 20 is detachably disposed at one end of the holding portion 12 close to the rotation output portion 14.

The weight block 20 is detachably arranged at one end of the holding part 12 of the power tool 100 close to the rotary output part 14, when heavy-load grinding is carried out, the weight block 20 can be arranged at the front end of the holding part 12, the weight of the whole machine is increased, the gravity center is moved forwards, force is applied by means of the gravity of the machine when grinding is carried out, and the effect of saving labor is achieved; can demolish balancing weight 20 when the light load is polished (if the one hand is held), alleviate the load of during operation to alleviate operator's fatigue degree, raise the efficiency, so applicable in the operating mode of multiple difference, the operator of being convenient for uses, improves operator's use impression.

Specifically, the weight range of balancing weight 20 is 250~350g, and balancing weight 20's material can be plastics, metal etc. for example 45 steel, die-casting aluminum alloy, die-casting zinc alloy, ironstone powder metallurgy etc. and balancing weight 20 of different weight can be made into to different materials, satisfies multiple counter weight demand.

As shown in fig. 2-3, in the present embodiment, the cross section of the holding portion 12 is circular arc, and the weight 20 is a circular arc-shaped piece matching with the shape of the holding portion 12, i.e. the weight 20 is designed according to the shape of the holding portion 12, so as to facilitate holding. It is understood that the weight 20 may have other shapes in other embodiments, and is not limited herein.

In one embodiment, the grip portion 12 is provided with an air blowing port 13, the weight 20 is provided with an air outlet 21, the air outlet 21 is communicated with the air blowing port 13, after the weight 20 is covered on the grip portion 12, the air outlet 21 communicated with the air blowing port 13 is communicated with an inner cavity of the grip portion 12 to dissipate heat, part of heat generated by the operation of the power tool 100 is taken away, the temperature of the grip portion 12 is reduced, and the hand of a user is prevented from being scalded.

Specifically, the counterweight 20 is provided with an air outlet portion 23 corresponding to the protruding of the air outlet 13, a certain gap is reserved between the air outlet portion 23 and the holding portion 12 to form an air passage 30, the air outlet 21 is communicated with the air passage 30 and is arranged at one end of the air outlet portion 23 close to the rotary output portion 14, air in the inner cavity of the holding portion 12 can flow through the air outlet 13 and flow out through the air passage 30, the air flows out through the air outlet 21 close to the rotary output portion 14, heat generated by the work of the power tool 100 can be taken away, air can be guided to the rotary output portion 14, and part of dust generated by the work is blown away. It can be understood that the air outlet 21 may be disposed on the air outlet portion 23 alone, or may be defined by an end of the air outlet portion 23 and an outer periphery of the holding portion 12, which is not limited herein.

Further, as shown in fig. 1, the air outlet portions 23 are located at opposite ends of the longitudinal section of the grip portion 12, and correspond to the left and right sides of the longitudinal section of the grip portion 12 of an operator gripping the power tool, that is, the air outlet portions 23 are located at the left and right sides of the operator, and the air led out from the air outlet 21 by the air outlet portions 23 flows out from the left and right sides of the operator, and does not blow the face of the operator, nor blow dust to the face of the operator, thereby protecting the face of the operator.

Preferably, the outlet 21 is arranged obliquely with respect to the grip 12 close to the rotary output 14, and the wind blown out from the outlet 21 is guided to gather to the rotary output, increasing the wind volume flowing through the rotary output 14 to carry away more dust at the rotary output 14.

In one embodiment, the weight member 20 includes a left weight member 25 and a right weight member 27, and the left weight member 25 and the right weight member 27 are detachably connected and respectively cover opposite sides of the holding portion 12. The counterweight 20 is separately arranged, so that the counterweight 20 can be conveniently mounted and dismounted. It is understood that in other embodiments, the weight 20 may be integrally disposed, and is not limited thereto.

Further, left balancing weight 25 and right balancing weight 27 are semi-circular arc spare, and left balancing weight 25 and right balancing weight 27 butt joint can form with the arc spare of the 12 looks adaptations of portion of gripping, are convenient for grip, install, bring the good man-machine experience of user.

Furthermore, the air blowing port 13 includes a left air blowing port 132 and a right air blowing port 134 respectively disposed on two opposite sides of the holding portion 12, and the left weight block 25 and the right weight block 27 are respectively provided with air outlet portions 23 corresponding to the left air blowing port 132 and the right air blowing port 134, so that the power tool 100 can uniformly dissipate heat and blow air in a left-right direction when the left weight block 25 and the right weight block 27 are used, and the comfort level of the user is improved.

Specifically, the left weight 25 and the right weight 27 are detachably connected by screws, and it can be understood that the left weight 25 and the right weight 27 can also be connected by a snap connection, a pin connection, or the like, which is not limited herein.

As shown in fig. 1, in the present embodiment, the holding portion 12 includes a first holding portion 121 and a second holding portion 123 connected to each other at a certain angle, the rotation output portion 14 is disposed at an end of the second holding portion 123 far from the first holding portion 121, the first holding portion 121 is the most important holding portion, the second holding portion 123 plays a role of assisting in holding the power tool 100, the rotation output portion 14 is disposed at an end of the second holding portion 123, and the weight block 20 is detachably disposed at the second holding portion 123 near the rotation output portion 14, so as to move forward the center of gravity, provide a certain downward pressure for the power tool 100, and save manpower.

Further, the power tool 100 further includes a control switch 30, and the control switch 30 is disposed at a connection position of the first holding portion 121 and the second holding portion 123, so as to be pressed by an operator to control a working state of the power tool 100.

In this embodiment, the power tool 100 is an electric drill, and the weight member 20 is detachably disposed on the body near the electric drill rotation output portion 14, and the weight member 20 is selectively mounted or dismounted according to the working condition, so that the use is convenient, and the cost is saved. It is understood that in other embodiments, the power tool 100 may also be an electric/pneumatic grinding tool such as a sander, a straight grinder, etc., and is not limited thereto.

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

Claims

1. A power tool is characterized by comprising a machine body and a balancing weight, wherein the machine body comprises a holding part and a rotary output part arranged at one end of the holding part, and the balancing weight is detachably arranged at one end, close to the rotary output part, of the holding part;

the holding part comprises a first holding part and a second holding part which are mutually connected at a certain angle, the rotation output part is arranged at one end of the second holding part far away from the first holding part, and the balancing weight is detachably arranged at the second holding part close to the rotation output part;

the holding part is provided with an air blowing port, the balancing weight is provided with an air outlet, and the air outlet is communicated with the air blowing port;

the balancing weight corresponds the mouth of blowing is equipped with air-out portion, air-out portion is located the relative both sides of the longitudinal section of portion of gripping, just air-out portion with it has certain clearance to form the wind passageway to reserve between the portion of gripping, the air outlet with cross wind passageway intercommunication and locate air-out portion is close to the one end of rotatory output portion.

2. The power tool of claim 1, wherein the air outlet is disposed obliquely with respect to the grip portion near the rotary output portion.

3. The power tool of claim 1, wherein the weight member comprises a left weight member and a right weight member, the left weight member and the right weight member being detachably connected to each other and respectively covering opposite sides of the holding portion.

4. The power tool of claim 3, wherein the left weight and the right weight are both semi-circular arc shaped pieces, and the left weight and the right weight are butted to form a circular arc shaped piece matched with the holding part.

5. The power tool of claim 3, wherein the left weight and the right weight are removably connected by a screw.

6. The power tool of claim 1, wherein the weight of the weight block is in the range of 250-350 g.

7. The power tool of claim 1, wherein the power tool is a power drill.