CN218658895U

CN218658895U - Electric tool

Info

Publication number: CN218658895U
Application number: CN202222865807.4U
Authority: CN
Inventors: 曹健; 伊宝林; 陈威
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2022-10-29
Filing date: 2022-10-29
Publication date: 2023-03-21
Anticipated expiration: 2032-10-29

Abstract

The utility model discloses an electric tool, include the casing, locate impact assembly in the casing and with the handle that the casing is connected, the casing with be equipped with the buffering between the handle impact the shock pad of subassembly release impact energy, the casing with the junction of handle be equipped with buffering plane and protrusion in buffering planar bulge, the middle part of shock pad be equipped with the locating hole that the external contour of bulge suited, the bulge passes the locating hole and with the handle is pegged graft fixedly, the shock pad be extrusion state support hold in buffering plane with between the handle. The utility model discloses an electric tool adds the shock pad in the junction between handle and casing and cushions the impact energy that strikes the release of subassembly, need not to change the original structure of electric tool by a wide margin, and the design is simple, low cost.

Description

Electric tool

Technical Field

The utility model relates to an electric tool field, in particular to improve absorbing electric tool.

Background

With the continuous progress of the technology, people replace the traditional manual or mechanical tools with electric tools in more and more working occasions. The electric tool has higher machining precision and higher machining efficiency, but when kinetic energy is continuously output, the generated vibration is often larger. Severe vibration, in addition to causing discomfort and fatigue to the operator, also tends to damage parts and reduce the service life of the power tool.

Accordingly, there is a need for an improved power tool that overcomes the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, an object of the utility model is to provide an electric tool with improve shock attenuation effect.

The utility model provides a technical scheme that prior art problem adopted is:

the utility model provides an electric tool, includes the casing, locates strike the subassembly in the casing and with the handle that the casing is connected, the casing with be equipped with the buffering between the handle strike the shock pad of subassembly release impact energy, the casing with the junction of handle be equipped with the buffering plane and protrusion in buffering planar bulge, the middle part of shock pad be equipped with the locating hole that the external profile of bulge suited, the bulge passes the locating hole and with the handle is pegged graft fixedly, the shock pad be extrusion state support hold in the buffering plane with between the handle.

The further improvement scheme is as follows: the shock pad is provided with an outer side surface exposed outside the electric tool, and the outer side surface is smoothly connected with the outer wall surface of the shell.

The further improvement scheme is as follows: the outer side surface is smoothly connected with the outer wall surface of the handle.

The further improvement scheme is as follows: the lateral surface is the notch cuttype.

The further improvement scheme is as follows: the positioning hole is formed by connecting at least one pair of through holes with different cross section shapes in parallel.

The further improvement scheme is as follows: the shock pad is also provided with a wire feeding hole through which a power supply wire penetrates, and the wire feeding hole is different from the positioning hole in shape.

The further improvement scheme is as follows: the casing is including the tail-hood that is provided with the circuit board, one side that the tail-hood is close to the shock pad is equipped with the inlet wire that the line hole meets the intercommunication.

The further improvement scheme is as follows: the shock pad in the assembled position further includes an upper end portion located above the middle portion and a lower end portion located below the middle portion, the upper end portion and the lower end portion being bent toward the grip direction.

The further improvement scheme is as follows: the bending angle of the upper end part and the lower end part is 30-60 degrees.

The further improvement scheme is as follows: the impact assembly comprises a working head for outputting impact energy, a motor for providing a power source for the working head, a reduction box and a cylinder, wherein the reduction box and the cylinder are sequentially driven between the motor and the working head, the shell comprises a protective cover for accommodating the motor, and the protective cover is integrally formed.

Compared with the prior art the utility model discloses following beneficial effect has: the shell is provided with a buffer plane and a protruding part protruding out of the buffer plane at the joint of the shell and the handle, the middle part of the shock pad is provided with a positioning hole matched with the external profile of the protruding part, the protruding part penetrates through the positioning hole and is fixedly connected with the handle in an inserting mode, and the shock pad is in an extrusion state and is abutted between the buffer plane and the handle. The electric tool is additionally provided with the shock pad at the joint between the handle and the shell to buffer the impact energy released by the impact assembly, the original structure of the electric tool is not required to be greatly changed, the design is simple, and the cost is low; the position and the shape of the buffer pad can be adjusted according to the connecting structure between the handle and the shell, when the extending connecting structure is arranged between the handle and the shell, the buffer pad gives a space for the connecting structure to pass through and tightly surrounds the connecting structure to reduce the vibration of the connecting structure, namely the buffer pad tightly surrounds the bulge part to effectively reduce the vibration of the connecting structure in the non-impact direction; the shock pad is fixed without gluing or adopting fasteners such as bolts or screws, the cost of the electric tool is saved, and the processing and manufacturing flow is simplified.

Drawings

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a front view of a power tool in a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the power tool shown in FIG. 1;

FIG. 3 is an enlarged partial cross-sectional view of the power tool shown in FIG. 2;

FIG. 4 is a partially disassembled view of the power tool shown in FIG. 1;

FIG. 5 is a front view of a cushion of the power tool of FIG. 1;

fig. 6 is a side view of a cushion pad of the power tool shown in fig. 1.

The meaning of the reference symbols in the figures:

100. the shock absorbing device comprises a machine shell 110, a buffer plane 120, a convex part 130, a tail cover 131, a wire inlet 140, a protective cover 200, an impact assembly 210, a working head 220, a motor 230, a reduction gearbox 240, an air cylinder 250, a ram 300, a handle 310, a battery pack interface 320, a switch 400, a shock absorbing pad 410, a middle part 420, a positioning hole 430, an outer side surface 440, a wire routing hole 450, an upper end part 460, a lower end part 500 and a circuit board

Detailed Description

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. Words such as "upper," "lower," "front," "rear," and the like, which indicate orientation or positional relationships, are used solely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to fig. 1 to 2, a preferred embodiment of the present invention relates to an electric tool, and more particularly, to an electric hammer and an electric pick. The electric tool comprises a housing 100, a striking assembly 200 and a grip 300, wherein the striking assembly 200 is disposed in the housing 100, and the grip 300 is connected to the housing 100. The impact assembly 200 is used for receiving kinetic energy and then outputting impact impulse to the outside, and in the process, the impact assembly 200 and the electric tool to which the impact assembly belongs vibrate, so that the impact generated by vibration is reduced by adopting a damping structure comprising the damping pad 400. The grip 300 can be understood as a component fixed on the housing 100 for being held by a human hand, and at least one switch 320 for controlling the power tool is further included thereon. After the hand holds the grip 300 and starts the electric tool, the electric tool generates vibrations with different amplitudes and frequencies according to different working conditions, and particularly, when the working head 210 of the electric tool works on a hard working surface such as cement, ceramic tiles and the like, the violent vibrations can be absorbed by the damping structure and are transmitted to the grip 300 and the hand less.

The damping structure is used for reducing vibration of the electric tool and damage caused by vibration, and can improve use comfort. The damping structure is disposed at the handle 300 itself or at the only connecting position between the handle 300 and the housing 100, so that the comfort of holding the electric tool is improved significantly, and the fatigue after long-term holding operation can be reduced. Specifically, the grip 300 itself may be made at least partially of a soft material, such as rubber, soft plastic, etc.; the connection unit of the handle 300 and the casing 100 may be an elastic element such as a spring, a spring plate, etc. In the electric tool of the present embodiment, the shock absorbing pad 400 is additionally disposed at the joint between the handle 300 and the housing 100 to buffer the impact energy released by the impact assembly 200, so that the original structure of the electric tool does not need to be changed greatly, and the electric tool has a simple design and a low cost. The position and shape of the cushion pad can be adjusted according to the connection structure between the handle 300 and the housing 100, and when the extension-type connection structure is provided between the handle 300 and the housing 100, the cushion pad 400 gives up space to allow the connection structure to pass through and tightly surrounds the connection structure to reduce the vibration of the connection structure.

Referring to fig. 3 to 6, the connecting structure is configured as a protrusion 120 in the present embodiment, and the protrusion 120 protrudes from the buffer plane 110 of the housing 100 at the connection point with the handle 300. The surface of the handle 300 opposite to the buffer plane 110 is provided with a concave corresponding to the protrusion 120 to accommodate the protrusion 120, so that the handle 300 is fixed to the housing 100. The protrusion 120 and the recess may be provided with a corresponding zigzag structure to engage with each other, so as to enhance the fixing of the grip 300 and the housing 100. The zigzag structure includes a transverse bend at the front end of the protrusion 120, making the protrusion 120 in a T-shape; and a transverse bend at the open end of the recess. The middle portion 410 of the shock absorbing pad 400 is provided with a positioning hole 420 adapted to the outer contour of the protrusion 120, that is, the inner contour of the positioning hole 420 is identical to the outer contour of the protrusion 120 passing through the positioning hole 420, so that the shock absorbing pad 400 tightly covers the protrusion 120 when the protrusion 120 is inserted into the positioning hole 420 and inserted into the handle 300. The impact energy released by the impact assembly 200 generates vibration including vibration of the impact assembly 200 itself and vibration generated by recoil on the working surface, and the shell 100 conducts vibration in multiple directions including the impact direction as the main direction to the handle 300, so that the shock pad 400 tightly surrounds the protrusion 120 to effectively reduce the vibration in the non-impact direction of the connecting structure.

In the present embodiment, the shock absorbing pad 400 is held between the buffer plane 110 and the grip 300, and buffers the impact transmitted to the grip 300 in the impact direction. The shock pad 400 is supported between the buffer plane 110 and the grip 300 in a squeezed state on one side and limited by the protrusion 120 on the other side, so that the shock pad 400 is fixed without gluing or adopting fasteners such as bolts or screws, the cost of the electric tool is saved, and the processing and manufacturing process is simplified.

The shock pad 400 is also partially exposed to the outside, thereby enhancing the beautifying effect of the electric tool. Specifically, the shock absorbing pad 400 includes an outer side 430 exposed outside the power tool, the outer side 430, the outer wall of the housing 100 and the outer wall of the grip 300 together form a part of the visual appearance of the power tool, and a separation region is formed between the housing 100 and the grip 300. The case 100 and the grip 300 are mostly made of hard materials such as hard plastic, and the flexible feature of the shock pad 400 makes the deformation of the divided region smooth, and the misalignment caused by the assembly error of the case 100 and the grip 300 is avoided. Further, the outer side 430 of the cushion 400 may be smoothly connected to the outer wall of the housing 100, and the outer side 430 of the cushion 400 may be smoothly connected to the outer wall of the grip 300. The shock pad 400 can be further processed to make the outer side 430 of the shock pad be stepped, and the stepped steps are recessed, so that the deformation recovery capability of the shock pad 400 after being extruded is improved, and the outer side 430 is prevented from cracking.

In order to prevent the positioning hole 420 and the protrusion 120 from having a wobbling gap due to manufacturing and assembling errors and to improve the fixing effect between the casing 100 and the grip 300, the positioning hole 420 is formed by at least a pair of through holes having different cross-sectional shapes. The plurality of through holes enable possible errors of a single through hole not to affect the overall assembly effect of the positioning hole 420 and the protrusion 120, for example, when the aperture of any through hole is too large, the protrusion 120 does not shake in the positioning hole 420. The cross sections of different through holes are different, and the through holes with different shapes, such as round, oval, rectangle and the like, are communicated with adjacent side faces so as to be communicated in parallel. In one embodiment, the positioning hole 420 has two through holes, which are respectively an oval and a rectangular through hole; in other embodiments, the positioning hole 420 has three through holes, including circular, rectangular, and square through holes. The shock pad 400 further has a wire hole 440 for a power supply wire to pass through, the shape of the wire hole 440 is different from that of the positioning hole 420 to avoid confusion, and grooves or through holes can be formed for communication.

The housing 100 of the power tool includes a tail cap 130, and the tail cap 130 is located at the bottom of the main body of the housing 100. The tail cap 130 is provided with a circuit board 500, and the circuit board 500 is fixed in the tail cap 130 and protected by the tail cap 130. The tail cap 130 may be opened and closed on one side or may be removably connected to other portions of the housing 100, such as the portion of the housing 100 that houses the motor 220. One side of the tail cover 130 adjacent to the shock-absorbing pad 400 is provided with a wire inlet 131 connected and communicated with the wire routing hole 440, and the wires can be respectively communicated with the components in the machine shell 100 and the grip 300 through the wire inlet 131 and the wire routing hole 440, including the switch 320, the display component, the motor 220, the battery pack interface 310, the circuit board 500 and the like.

In one embodiment, a switch 320 is disposed on a side of the handle 300 close to the housing 100 for controlling the power tool to start and stop, and a battery pack interface 310 is disposed at the bottom of the handle 300 for connecting a battery pack (not shown). The wires are led out from the switch 320 and the battery pack interface 310, and enter the casing 100 through the wire hole 440 and the wire inlet 131 in sequence, so as to be communicated with the components such as the circuit board 500 and the like, and provide power supply and control signals for the electric tool. The wire routing holes 440 of the shock pad 400 constrain the wires to be regular, and the wire routing holes 440 can be oriented as needed to guide the wires to run.

When the cushion 400 is in the assembled position, the cushion has an upper end 450 located at an upper end of the power tool and a lower end 460 located at a lower end of the power tool, and the upper end 450 and the lower end 460 are located above and below the middle portion 410 of the cushion 400, respectively. The upper end 450 and the lower end 460 are bent toward the grip 300 at a certain angle, so that the cushion 400 is in a bridge shape with a straight middle and bent ends. Particularly, when the shock in the non-impact direction is buffered, for example, the shock in the upper and lower directions or the oblique upper and lower directions relative to the electric tool, the bent shock pad 400 can play a role in buffering in the corresponding direction, thereby further improving the buffering effect. The casing 100 may be recessed inward to reserve an assembly position for the cushion 400, and the cushion 400 may be partially embedded in the casing 100 and limited by the casing 100. The recess for accommodating the cushion 400 is adapted to the contour of the cushion 400, and the upper and lower end faces of the recess are slope faces for matching with the bent upper end part 450 and the bent lower end part 460 of the cushion 400, so that the limiting effect is further increased, and the assembly error and the displacement after vibration are prevented.

In one embodiment, the upper end 450 and lower end 460 are bent at an angle of 30-60. It should be noted that: the angle of curvature of the upper end portion 450 and the lower end portion 460, i.e., the angle of warpage from the straight middle portion 410; the upper end 450 and the lower end 460 may be bent at the same or different angles. Here, the bending angle of the upper end portion 450 and the lower end portion 460 may be 30 °, 45 °, 60 °, and the like, and preferably, the bending angle of the upper end portion 450 and the lower end portion 460 is 45 °.

The electric tool is used for outputting impact impulse outwards, and the impact assembly 200 comprises a working head 210 directly outputting impact energy outwards, a motor 220 providing a power source for the working head 210, a reduction gearbox 230, an air cylinder 240 and a ram 250 which are arranged between the motor 220 and the working head 210 and are sequentially driven. The electric tool may be an electric hammer, an electric pick, etc., wherein a ram, a piston and a cylinder may be arranged to define an airtight space to constitute the cylinder 240, the piston may reciprocate along the inner wall of the cylinder in the cylinder, and energy may be transferred to the ram by compression of air in the airtight space, so that the ram may transfer impact impulse to the working head 210 via the ram 250. The working head 210 may be a drill bit, a pick, or the like, and may further include a fixture for clamping the drill bit, the pick, or the like, and the working head 210 acts on a workpiece or a working surface to be processed to perform operations of drilling, leveling, digging, grooving, and the like of the electric tool. Preferably, the power tool is an electric hammer. The casing 100 includes the protection cover 140 accommodating the motor 220, and the protection cover 140 is integrally formed, simplifying the number of molds required for forming the casing 100.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many alternatives to the power tool described herein may be made without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. The utility model provides an electric tool, includes the casing, locates strike the subassembly in the casing and with the handle that the casing is connected, the casing with be equipped with the buffering between the handle strike the shock pad of subassembly release impact energy, its characterized in that: the shell is provided with a buffer plane and a protruding part protruding out of the buffer plane at the joint of the shell and the handle, the middle part of the shock pad is provided with a positioning hole matched with the external profile of the protruding part, the protruding part penetrates through the positioning hole and is fixedly connected with the handle in an inserting mode, and the shock pad is in an extrusion state and is abutted between the buffer plane and the handle.

2. The power tool of claim 1, wherein: the shock pad is provided with an outer side surface exposed outside the electric tool, and the outer side surface is smoothly connected with the outer wall surface of the shell.

3. The power tool of claim 2, wherein: the outer side surface is smoothly connected with the outer wall surface of the handle.

4. The power tool of claim 2, wherein: the lateral surface is the notch cuttype.

5. The power tool of claim 1, wherein: the positioning hole is formed by connecting at least one pair of through holes with different cross section shapes in parallel.

6. The power tool of claim 1, wherein: the shock pad is also provided with a wire feeding hole through which a power supply wire penetrates, and the wire feeding hole is different from the positioning hole in shape.

7. The power tool of claim 6, wherein: the casing is including the tail-hood that is provided with the circuit board, one side that the tail-hood is close to the shock pad is equipped with the inlet wire that the line hole meets the intercommunication.

8. The power tool of claim 1, wherein: the shock pad at the assembly position further comprises an upper end portion located above the middle portion and a lower end portion located below the middle portion, and the upper end portion and the lower end portion are bent towards the grip direction.

9. The power tool of claim 8, wherein: the bending angle of the upper end part and the lower end part is 30-60 degrees.

10. The power tool of claim 1, wherein: the impact assembly comprises a working head for outputting impact energy, a motor for providing a power source for the working head, a reduction gearbox, an air cylinder and a ram, wherein the reduction gearbox, the air cylinder and the ram are sequentially arranged between the motor and the working head in a transmission manner, the shell comprises a protective cover for accommodating the motor, and the protective cover is integrally formed and manufactured.