CN218698484U - 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 used for being connected with the mounting part and comprises two clamping blocks which are oppositely arranged and are 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 limiting surface is provided with a plurality of convex edges, the convex edges are arranged to be respectively arranged in a plurality of limiting grooves which are concavely arranged on the installation part, the convex edges extend along a first direction, and the first direction is perpendicular to the slipping direction of the clamping block relative to the installation part. The clamping part can be firmly and stably connected to the electric tool through the arrangement, 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 often flapped or twisted when the output torque is larger than the torque controlled by a single hand because the handles are held by the single hand, so that the arms of people are injured. Therefore, the power tool is usually added with an additional auxiliary handle, and the auxiliary handle is held by the other hand, so that a counteracting moment is added to counteract redundant output 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 smaller 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 in 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 used for being connected with the mounting part and comprises two clamping blocks which are oppositely arranged and are 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 spacing face that extends along the slippage direction that the installation department set up, be equipped with a plurality of beads on the spacing face, a plurality of beads set to be used for getting into respectively concave and locate a plurality of spacing inslots of installation department, the bead extends along the first direction, the first direction perpendicular to press from both sides tight piece relatively the slippage direction of installation department.

The further improvement scheme is as follows: the number of the convex ribs on the limiting surface is not more than that of the limiting grooves.

The further improvement scheme is as follows: the limiting surface is further provided with a plurality of grooves, the grooves are respectively in one-to-one correspondence with the convex edges, and the convex edges and the grooves form the limiting surface with a wavy cross section.

The further improvement scheme is as follows: the clamping block comprises an attaching surface adjacent to the limiting surface, the attaching surface is used for attaching to the top of the mounting portion, and the attaching surface is arc-shaped.

The further improvement scheme is as follows: the clamping block further comprises a positioning surface adjacent to the limiting surface, the limiting surface is located between the attaching surface and the positioning surface, and the positioning surface is arranged to be attached to a depressed area, arranged on the main body portion adjacent to the installation portion, of the main body portion.

The further improvement scheme is as follows: the two clamping blocks are detachably connected through the connecting part.

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 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 matched with the thread.

Another object of the present invention is to provide an electric tool, including longitudinally extending's main part and with the main part becomes the portion of gripping that certain angle extends, the top of main part is equipped with the installation department, electric tool still includes as above arbitrary assist handle, assist 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 clamping part is so set up with electric tool's installation department for the clamping part can firmly, stably connect on electric tool, has overcome among the prior art grab the problem that the auxiliary handle of formula of pressing from both sides easily slips 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 cross-sectional view of a part of the 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. Depressed area 102, side 1021, and limiting groove

1023. Protrusion 103, top surface 104, attachment tab

11. Front shell 2 of reduction box, auxiliary handle 21 and handle part

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

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

2511. Bead 2513, groove 253 and positioning surface

255. Binding surface 256, mounting hole 257 and guiding hole

26. Guide pin 27, nut 28 and gasket

3. Grip portion 4 and battery pack receiving portion

[ 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, in the present embodiment, a power tool and an auxiliary handle 2 thereof are described, in which a power drill 100 is used as an example, but the auxiliary handle 2 may be applied to other tools such as an electric hammer, an impact wrench, and an angle grinder, and thus the power drill 100 according to the present embodiment does not limit the scope of the power tool.

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 main part 1 is equipped with the installation department 10 that is used for receiving auxiliary handle 2, and in this embodiment, transmission structure includes reducing gear box and the gear reduction mechanism who is located the reducing gear box, and wherein, the reducing gear box includes reducing gear box protecgulum 11 and reducing gear box back seat, and the reducing gear box back seat is acceptd in main part 1, and reducing gear box protecgulum 11 passes through screw fixed connection in main part 1 to be equipped with circumference limit structure in order to prevent that reducing gear box protecgulum 11 from taking place the rotation relative to main part 1 on the reducing gear box protecgulum 11. 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 gearbox front casing 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 fixedly connecting with the mounting portion 10, including two oppositely disposed clamping blocks 25 for clamping the mounting portion; 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; it has the spacing face 251 that is used for with installation department 10 interlock to press from both sides tight piece 25, on the spacing face 251 press from both sides tight piece 25 have the face towards the spacing face 251 that extends along the slippage direction that installation department 10 set up, be equipped with a plurality of beads 2511 on the spacing face 251, a plurality of beads 2511 set to be used for getting into respectively concave the establishing in a plurality of spacing grooves 1021 of installation department 10, bead 2511 extends along first direction, first direction perpendicular to press from both sides tight piece 25 relatively the slippage direction of installation department 10. Because the convex-concave matching of the plurality of convex ridges 2511 of the clamping part and the limiting groove 1021 of the mounting part 10 increases the resistance in the slipping direction, and the firmness and the stability of the connection from the clamping part to the mounting part 10 are enhanced. The slip direction refers to a direction in which the auxiliary handle 2 may slip off the drill 100, and in the present embodiment, the slip direction is perpendicular to the longitudinal direction.

Referring to fig. 2 and 3, two clamping blocks 25 of the clamping portion are respectively located at both sides of the mounting portion 10 for clamping the mounting portion 10. The mounting portion 10 has two side surfaces 102 corresponding to the limiting surfaces 251 of the two clamping blocks 25, each side surface 102 is provided with a plurality of limiting grooves 1021, and the number of the convex ribs 2511 on the limiting surfaces 251 is not more than the number of the limiting grooves 1021. For the convenience of description, only the left clamping block 25 and the side surface 102 of the mounting portion 10 are described in detail, and the other pair of side surfaces 102 and the clamping block 25 are symmetrical and similar in structure. In the present embodiment, the number of the protruding ribs 2511 is equal to that of the stopper grooves 1021, and they are tightly engaged with each other. In other embodiments, the number of the protruding ribs 2511 may be smaller than the number of the stopper grooves 1021, which may allow the clamping portion to move upward in the slip-off direction as needed to be fixed at a higher position.

As shown in fig. 3 and 4, the limiting surface 251 is further provided with a plurality of grooves 2513, the plurality of grooves 2513 and the plurality of ribs 2511 are arranged at intervals one by one, and the ribs 2511 and the grooves 2513 form a wave-shaped cross section of the limiting surface 251. Compared with a common plane, the arrangement of the grooves 2513 on the limiting surface 251 enables the height of the convex rib 2511 between two adjacent grooves 2513 to be higher, and the contact depth of the convex rib 2511 and the side surface 102 of the mounting part 10 is increased.

Corresponding to the position-limiting surface 251, the side surface 102 is provided with a plurality of protrusions 1023 matched with the grooves 2513, the protrusions 1023 and the position-limiting grooves 1021 are arranged at intervals, and the protrusions 1023 and the position-limiting grooves 1021 form a wave-shaped cross section of the side surface 102. The ridge 2511 of the limiting surface 251 matches with the limiting groove 1021 of the side surface 102, and the groove 2513 of the limiting surface 251 matches with the protrusion 1023 of the side surface 102, so that the depth of the mutual entering of the mounting part 10 and the clamping part in the vertical direction of the slipping direction is larger, and further meshing and locking of the mounting part 10 and the clamping part are facilitated.

The cross sections of the convex edge 2511 and the protrusion 1023 can be circular arc, triangular, tooth-shaped, polygonal or other special shapes, and correspondingly, the cross sections of the limiting groove 1021 and the groove 2513 are respectively matched with the cross sections of the convex edge 2511 and the protrusion 1023.

The clamping block 25 comprises an abutting surface 255 adjacent to the limiting surface 251, the abutting surface 255 is used for abutting against the top surface 103 of the mounting portion 10, and the abutting surface 255 is in a circular arc shape. In the present embodiment, the mounting portion 10 is adapted to the shape of the body portion 1, and thus the top surface 103 is a circular arc segment adapted to the circular cross-section of the body portion 1. The arc-shaped abutting surface 255 of the clamping block 25 is matched with the top surface 103, so that the contact surface of the clamping part and the mounting part 10 is larger, and the firmness of connection of the clamping part and the mounting part is further enhanced.

The clamping block 25 further comprises a locating surface 253 adjacent the restraining surface 251, the restraining surface 251 being intermediate the abutment surface 255 and the locating surface 253, the locating surface 253 being configured to abut the recessed region 101 of the body portion 1 adjacent the mounting portion 10. Due to the provision of the recessed region 101, the grip portion has more contact surface with the drill, facilitating a reinforced connection of the grip portion to the mounting portion 10.

In the above, the tendency of the auxiliary handle to slip or rock up and down relative to the drill 100 is limited by the engagement of the recessed region 101, the side 102 of the mounting portion 10 and the gripping block 25.

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.

Specifically, the clamping block 25 and the connecting portion 23 are locked by a threaded connection, and as shown in fig. 2 and fig. 3, 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 guide pin 26, the two clamping blocks 25 are provided with guide holes 257 parallel to the mounting holes 256, and the guide pin 26 sequentially penetrates through the two guide 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 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 locked with the two clamping blocks 25 through threaded fit.

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. It will be readily appreciated by those skilled in the art that many alternatives to the assist handle 2 and power tool of the present invention are possible 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 (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 used for being connected with the mounting part and comprises two clamping blocks which are oppositely arranged and are used for clamping the mounting part;

a handle portion 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 spacing face that extends along the slippage direction that the installation department set up, be equipped with a plurality of beads on the spacing face, a plurality of beads set to be used for getting into respectively concave and locate a plurality of spacing inslots of installation department, the bead extends along the first direction, the first direction perpendicular to press from both sides tight piece relatively the slippage direction of installation department.

2. The auxiliary handle according to claim 1, wherein the number of the protrusions on the stopper surface is not greater than the number of the stopper grooves.

3. The assist handle as claimed in claim 1, wherein the limiting surface is further provided with a plurality of grooves, the plurality of grooves are respectively arranged in one-to-one correspondence with the plurality of ribs, and the ribs and the grooves form the limiting surface with a wave-shaped cross section.

4. The assist handle of claim 1 wherein the gripping block includes an abutment surface adjacent the stop surface for abutting against the top of the mounting portion, the abutment surface being configured in the shape of a circular arc.

5. The assist handle of claim 4 wherein the grip block further includes a locating surface adjacent the limit surface, the limit surface being intermediate the abutment surface and the locating surface, the locating surface being configured for abutment with a recessed region of the main body portion disposed adjacent the mounting portion.

6. The auxiliary handle according to claim 1 wherein said two gripping blocks are removably connected by said connecting portion.

7. The assist handle as set forth in claim 6 wherein said clamp block is provided with a mounting hole therethrough, said mounting hole being provided with an internal thread, said connecting portion including a first end adjacent said clamp portion, said first end being provided with an external thread mating with said internal thread.

8. The auxiliary handle according to claim 7, 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.

9. The assist handle as set forth in claim 1 wherein said handle portion is hollow cylindrical and said connecting portion further includes 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 including a nut threadably engaged 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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