CN218658899U - Auxiliary handle and electric tool with same - Google Patents

Abstract

The utility model relates to an auxiliary handle for be connected to and grip with the assistance on the electric tool, the electric tool includes longitudinal extension's main part, and the top of main part is equipped with the installation department that is used for installing auxiliary handle, and auxiliary handle includes: the clamping part is fixedly connected with the mounting part and comprises two clamping blocks which are oppositely arranged and used for clamping the mounting part; a handle part for holding by a user; and a connecting portion for connecting the clamping portion and the handle portion; the clamping block is provided with a limiting surface which is arranged towards the installation part and extends along the slipping direction, the clamping block is provided with a limiting bulge which extends outwards from the limiting surface, and the limiting bulge is arranged to extend into a receiving groove which is concavely arranged on the installation part and is constructed to be in clearance fit with the receiving groove. Because the limiting surface and the limiting protrusion of the clamping block are arranged, the clamping part can be firmly and stably connected to the electric tool, and the problem that the auxiliary handle in the clamping type is easy to slip from the electric tool in the prior art is solved.

Description

Auxiliary handle and electric tool with same

[ technical field ]

The utility model relates to an electric tool's technical field, in particular to an auxiliary handle for electric tool.

[ background art ]

Common electric tools such as electric drills, angle grinders, electric hammers, impact wrenches and the like are in a single-hand holding form because the handles are all adopted, and when the output torque is greater than the torque controlled by a single hand, the hand throwing phenomenon or the hand twisting phenomenon often occurs, so that the injury to the arms of people is caused. Therefore, the power tool is usually added with an additional auxiliary handle, and the auxiliary handle is held by the other hand, so that the redundant output torque is offset in the form of offset torque.

However, the common auxiliary handle of the electric tool in the market at present is easy to occupy the longitudinal size of the electric tool due to different fixing modes, so that the development trend of miniaturization and light weight of the electric tool at present is violated; some clamping portions occupy small areas, but are easy to loosen in the auxiliary holding process, so that potential safety hazards are caused.

In view of the above, there is a need for an improved auxiliary handle for a power tool that overcomes the deficiencies of the prior art.

[ contents of utility model ]

To the not enough of prior art, the utility model aims to provide a fixed more firm auxiliary handle.

The utility model provides a technical scheme that prior art problem adopted is: an auxiliary handle for attachment to a power tool to assist gripping, the power tool including a longitudinally extending main body portion, a top portion of the main body portion being provided with a mounting portion for mounting the auxiliary handle, the auxiliary handle comprising: the clamping part is fixedly connected with the mounting part and comprises two clamping blocks which are oppositely arranged and used for clamping the mounting part; a handle part for holding by a user; and a connecting portion for connecting the grip portion and the handle portion; wherein, press from both sides tight piece have towards the installation department sets up along the spacing face that the slippage direction extends, press from both sides tight piece be equipped with certainly spacing arch that extends outward is faced to spacing, spacing arch sets to be used for extending to concavely locate the receiving groove of installation department just constructs with receiving groove clearance fit.

The further improvement scheme is as follows: the clamping block further comprises a bottom surface perpendicular to the limiting surface, a plane for the bottom surface to abut against is arranged on the main body, and the plane is parallel to the longitudinal direction.

The further improvement scheme is as follows: the clamping block further comprises a positioning surface used for connecting the limiting surface and the bottom surface, and the limiting surface and the positioning surface are intersected to form an angle not smaller than 90 degrees.

The further improvement scheme is as follows: the clamping block further comprises a binding face used for binding the installation portion, and the binding face is adjacent to the limiting face and is arc-shaped.

The further improvement scheme is as follows: the clamping block is provided with a through mounting hole, an internal thread is arranged in the mounting hole, the connecting portion comprises a first end adjacent to the clamping portion, and an external thread matched with the internal thread is arranged at the first end.

The further improvement scheme is as follows: the auxiliary handle further comprises a guide pin, guide holes parallel to the mounting holes are formed in the two clamping blocks, and the guide pin sequentially penetrates through the two guide holes.

The further improvement scheme is as follows: the handle portion is detachably connected with the connecting portion.

The further improvement scheme is as follows: the handle portion is a hollow cylinder, the connecting portion further comprises a second end adjacent to the handle portion, the handle portion is provided with a receiving hole for receiving the second end, and the auxiliary handle further comprises a nut for being matched with the thread.

Another object of the present invention is to provide an electric tool, including the main part of longitudinal extension and with the grip that the main part extends at certain angle, the top of main part is equipped with the installation department, wherein, electric tool includes as above any assistant handle, assistant handle detachably connect in the installation department.

Compared with the prior art, the utility model discloses following beneficial effect has: the application provides an auxiliary handle, because the spacing face and the spacing arch of pressing from both sides tight piece so set up for clamping part can firmly, connect on electric tool steadily, overcome among the prior art grab the problem that the auxiliary handle of formula of pressing from both sides easily slipped from electric tool.

[ description of the drawings ]

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

fig. 1 is a perspective view of an electric tool according to a preferred embodiment of the present invention;

FIG. 2 is an exploded view of the auxiliary handle and power tool of FIG. 1;

fig. 3 is a schematic sectional view of a partial structure of the electric power tool shown in fig. 1;

FIG. 4 is an enlarged view of the structure of the clamping block of the auxiliary handle shown in FIG. 2;

fig. 5 is an enlarged schematic view of the front case of the reduction gear box of the electric tool shown in fig. 2.

The meaning of the reference symbols in the figures:

100. electric drill 1, main body 10, and mounting part

101. Receiving groove 102, plane 103, recessed area

104. Connecting lug 2, auxiliary handle 21, handle part

211. Receiving hole 23, connecting portion 231, first end

232. Second end 25, clamping block 251, limiting surface

252. Limiting protrusion 253, positioning surface 254 and bottom surface

255. Attachment surface 256, mounting hole 26, guide pin

27. Nut 28, spacer 3, and grip portion

4. Battery pack receiving part 257, pilot hole 11 and reduction gearbox front shell 110

[ detailed description of the invention ]

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 3, the present embodiment describes an electric power tool and an auxiliary handle 2 thereof, taking an electric drill 100 as an example, but the electric drill 100 according to the present embodiment is not limited to the scope of the electric power tool, as the auxiliary handle 2 may be applied to other tools such as an electric hammer, an impact wrench, and an angle grinder.

As shown in fig. 1 and 3, the electric drill 100 includes a main body portion 1 extending in a longitudinal direction, and a grip portion 3 extending at an angle to the main body portion 1, and a battery pack receiving portion 4 is further provided below the grip portion 3 so as to detachably receive power supply from a battery pack. The main body 1 generally houses a motor connected to the battery pack, a transmission mechanism driven by the motor, and an output shaft that outputs mechanical motion via the transmission mechanism. In order to solve the problem that an impact structure may be further provided in the main body 1, and a large impact may be generated to an arm holding the grip portion 3 with one hand due to a large longitudinal or circumferential impact force or torsion force generated by the impact structure during the operation, the electric power tool according to the present embodiment further includes an auxiliary handle 2 for connecting to the tool to assist the grip.

The top of the main body 1 is provided with a mounting portion 10 for receiving the auxiliary handle 2. In the embodiment, the transmission structure comprises a reduction gearbox and a gear reduction mechanism located in the reduction gearbox, wherein the reduction gearbox comprises a reduction gearbox front shell 11 and a reduction gearbox rear seat, the reduction gearbox rear seat is contained in the main body portion 1, the reduction gearbox front shell 11 is fixedly connected to the main body portion 1 through screws, and a circumferential limiting structure is arranged on the reduction gearbox front shell 11 to prevent the reduction gearbox front shell 11 from rotating relative to the main body portion 1. Casing 11 is the aluminium finished piece before the reducing gear box, and the top of casing 11 before the reducing gear box is located to installation department 10 of this application. Of course, in other embodiments, the reduction gearbox front shell 11 may be housed within the main body 1, with the mounting portion 10 being part of the body of the main body 1.

With continued reference to fig. 1-3, the auxiliary handle 2 includes a clamping portion for fixed connection to the mounting portion 10, including two oppositely disposed clamping blocks 25; a handle portion 21 to be held by a user; and a connecting portion 23 for connecting the grip portion and the handle portion 21; the clamping block 25 has a limiting surface 251 facing the mounting portion 10 and extending in the sliding-out direction, the clamping block 25 is provided with a limiting protrusion 252 extending outward from the limiting surface 251, and the limiting protrusion 252 is disposed to extend into the receiving groove 101 recessed in the mounting portion 10 and configured to be in clearance fit with the receiving groove 101. The both sides of electric drill 100 installation department 10 are inwards sunken to be established and are formed receiving groove 101, with the spacing protruding 252 one-to-one cooperation of clamping part, spacing protruding 252 and receiving groove 101 are in the unsmooth cooperation in the vertical direction of slippage direction for clamping part and installation department 10's connection is more firm, and stability is higher. In the present embodiment, the slip-off direction is perpendicular to the longitudinal direction, which means a direction in which the auxiliary wrench is easily slipped off from the drill 100.

The cross section of the limiting protrusion 252 may be circular, triangular, polygonal or other irregular shapes, and the cross section of the receiving groove 101 matches the cross section of the limiting protrusion 252. The spacing protrusion 252 is in clearance fit with the receiving groove 101, so that the auxiliary handle 2 can deviate from the power tool at a certain angle when in use, and the limiting protrusion 252 is prevented from being broken off easily due to excessive rigidity.

As shown in fig. 3 and 5, the clamping block 25 further includes a bottom surface 254 adjacent to the positioning surface 253, the main body 1 is provided with a plane 102 for the bottom surface 254 to abut against, and the plane 102 is parallel to the longitudinal direction. The contact surface of the clamping block 25 and the mounting part 10 is increased, and the stability of connection of the clamping block and the mounting part is further enhanced.

In this embodiment, the clamping block 25 further includes a positioning surface 253 connecting the limiting surface 251 and the bottom surface 254, and the limiting surface 251 and the positioning surface 253 intersect to form an angle not less than 90 °. The limiting surface 251 and the bottom surface 254 are in transitional connection through the inclined positioning surface 253, so that the situation that the clamping block 25 is not tightly attached to the mounting portion 10 and the clamping block 25 is worn easily to influence the connection firmness due to the fact that the limiting surface 251 and the bottom surface 254 are in right-angle connection is avoided. And because spacing face 251 and locating surface 253 such angle setting have increased the area of contact of clamping part with installation department 10, and have increased the resistance that clamping part slipped from installation department 10 for the clamping part is more firm with being connected of installation department 10, has avoided among the prior art technical problem that auxiliary handle 2 easily slipped from electric tool.

The clamping block 25 further comprises an abutting surface 255 for abutting against the upper side of the mounting portion 10, and the abutting surface 255 is adjacent to the limiting surface 251 and is arc-shaped. The mounting portion 10 is a part of the body portion 1 of the electric drill 100, and the body portion 1 is cylindrical as a whole, so that the upper portion of the mounting portion 10 is formed in an arc shape, and the abutting surface 255 of the clamp block 25 abuts on the shape of the upper portion of the mounting portion 10, thereby further reinforcing the connection between the clamp portion and the mounting portion 10 and providing a beautiful appearance.

In the above, due to the receiving groove 101, the plane 102, and the recessed area 103 (the recessed areas located on the two sides of the mounting portion 10 on the front housing 11 of the reduction gearbox, for receiving the limiting surface 251, the positioning surface 253, and the bottom surface 254 of the clamping block 25) where the receiving groove 101 and the plane 102 are located, the connection and the matching of the mounting portion 10 and the clamping block 25 are deepened, so that the tendency that the auxiliary handle slides upwards or swings left and right relative to the electric drill 100 is limited.

It is worth mentioning that, referring to fig. 5, the front gearbox housing 11 comprises a plurality of attachment lugs 104 in the circumferential direction to attach the front gearbox housing 11 to the main body 1 by means of the fasteners, and wherein the attachment lugs 104 adjacent to the mounting portion 10 are located in the recessed areas 101, i.e. the attachment lugs 104 further limit the possibility of the auxiliary handle to be detached from the power drill 100 in the longitudinal direction (the direction of extension of the main body 1).

Referring to fig. 2 and 3, the connecting portion 23 is detachably connected to the two clamping blocks 25. The detachable connection enables the auxiliary handle 2 to be detached when not needed, for example, when storage and transportation are needed, thereby saving space and avoiding damage; in addition, the detachable connection mode also enables the auxiliary handle 2 to be matched with more tools, and as long as the structure of the installation part 10 is the same, the auxiliary handle 2 can be a universal part, so that the purchase cost is saved.

Referring to fig. 3, the clamping block 25 is locked with the connecting portion 23 by a threaded connection, specifically, the clamping block 25 is provided with a through mounting hole 256, an internal thread is provided in the mounting hole 256, the connecting portion 23 includes a first end 231 adjacent to the clamping portion, and the first end 231 is provided with an external thread matching the internal thread. In the present embodiment, the mounting holes 256 of the two clamp blocks 25 are provided with female screws, so that the trouble of recognizing the left and right clamp blocks 25 is avoided. Of course, the mounting hole 256 of one of the clamping blocks 25 may be an unthreaded hole, and the clamping block 25 is quickly sleeved on the connecting portion 23 through the unthreaded hole, so that only the threaded connection process of the other clamping block 25 needs to be completed, thereby saving time and improving work efficiency.

The auxiliary handle 2 further comprises a pilot pin 26, pilot holes 257 parallel to the mounting holes 256 are formed in the two clamping blocks 25, and the pilot pin 26 sequentially penetrates through the two pilot holes 257. The guide pin 26 is provided to facilitate the connection of the connecting portion 23 to the clamping portion while maintaining concentricity and to enhance the locking between the two clamping blocks 25. When the locking part is connected to the mounting part 10, one clamping block 25 needs to be connected to the connecting part 23 first, so that the limiting surface 251, the positioning surface 253, the bottom surface 254 and the abutting surface 255 of the clamping block 25 are abutted against the mounting part 10, the other clamping block 25 is abutted against the other side of the mounting part 10, and then the connecting part 23 is rotated to enable one end of the connecting part close to the clamping part to be matched with the two clamping blocks 25 through threads to realize locking.

As shown in fig. 2 and 3, the handle portion 21 is detachably connected to the connecting portion 23. Specifically, the handle portion 21 has a hollow cylindrical shape, the connecting portion 23 further includes a second end 232 adjacent to the handle portion 21, the handle portion 21 is provided with a receiving hole 211 for receiving the second end 232, and the handle portion 21 further includes a nut 27 threadedly engaged with the second end 232. In addition, the auxiliary handle 2 further includes a flexible pad 28 disposed between the grip portion 21 and the bolt, thereby reducing the impact of possible vibration on the user's arm to some extent.

To sum up, the utility model provides an auxiliary handle 2 and electric tool who has this auxiliary handle 2 because the clamping part of auxiliary handle 2 so sets up for the firm in connection of auxiliary handle 2 and electric tool is reliable, and difficult slippage has increased electric tool's convenience of use, has avoided user's arm to be easily because of the unexpected condition of spraining of one-hand operation.

The present invention is not limited to the above-described embodiments. One of ordinary skill in the art will readily recognize that there are numerous alternatives to the accessory handle 2 and power tool without departing from the spirit and scope of the present invention. The protection scope of the present invention is subject to the content of the claims.

Claims (10)

1. An auxiliary handle for attachment to a power tool to assist gripping, the power tool including a longitudinally extending main body portion, a top portion of the main body portion being provided with a mounting portion for mounting the auxiliary handle, the auxiliary handle comprising:

the clamping part is fixedly connected with the mounting part and comprises two clamping blocks which are oppositely arranged and used for clamping the mounting part;

a handle part for holding by a user; and

a connecting portion for connecting the grip portion and the handle portion;

the method is characterized in that: press from both sides tight piece have towards the installation department sets up and follows the spacing face that the slippage direction extends, press from both sides tight piece be equipped with certainly spacing arch that extends outward is faced to spacing, spacing arch sets to be used for extending to concavely locate the receiving tank of installation department and construct with receiving tank clearance fit.

2. The assist handle as claimed in claim 1 wherein the clamp block further comprises a bottom surface perpendicular to the stop surface, the main body portion having a flat surface against which the bottom surface abuts, the flat surface being parallel to the longitudinal direction.

3. The auxiliary handle according to claim 2, wherein the clamping block further comprises a positioning surface connecting the limiting surface and the bottom surface, and the limiting surface and the positioning surface intersect to form an angle of not less than 90 °.

4. The assist handle of claim 1 wherein the gripping block further includes an abutment surface for abutting above the mounting portion, the abutment surface being adjacent the limit surface and being arcuate.

5. The assist handle according to claim 1 wherein the connecting portion is detachably connected to the two gripping blocks.

6. The assist handle as set forth in claim 5 wherein said clamp block is provided with a mounting hole therethrough, said mounting hole being internally threaded, said connecting portion including a first end adjacent said clamp portion, said first end being externally threaded to mate with said internal thread.

7. The auxiliary handle according to claim 6, further comprising a pilot pin, wherein the two clamping blocks are provided with pilot holes parallel to the mounting holes, and the pilot pin sequentially passes through the two pilot holes.

8. The auxiliary handle according to claim 1, wherein the handle portion is detachably connected to the connecting portion.

9. The assist handle as set forth in claim 8 wherein said handle portion is hollow cylindrical, said connecting portion further comprising a second end adjacent said handle portion, said handle portion being provided with a receiving bore for receiving said second end, said handle portion further comprising a nut for threaded engagement with said second end.

10. A power tool comprising a longitudinally extending main body portion and a grip portion extending at an angle to the main body portion, the main body portion having a mounting portion at a top portion thereof, wherein the power tool further comprises an auxiliary handle as claimed in any one of claims 1 to 9, the auxiliary handle being detachably connected to the mounting portion.

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