CN114986454A - Auxiliary handle component and electric tool - Google Patents

Abstract

The present invention relates to an auxiliary handle member and an electric power tool, wherein the auxiliary handle member includes a handle portion extending in an axial direction and a fixing member connected to one end of the handle portion in the axial direction, and the fixing member connects the auxiliary handle member to the electric power tool. The auxiliary handle member further includes an adjustment member located between the fixed member and the power tool, the adjustment member having a locked state and an unlocked state. When the adjusting part is in a locking state, the adjusting part abuts against the fixing part so that the fixing part is fixed to the electric tool; when the adjusting component is in the unlocking state, the adjusting component is separated from the fixing component and keeps the unlocking state, so that the fixing component can freely rotate relative to the electric tool. According to the invention, the fixing component can be conveniently controlled to be in the locking state or the unlocking state by pressing the adjusting component, so that an operator can conveniently switch the angle of the auxiliary handle component, and the operation is simpler.

Description

Auxiliary handle component and electric tool

[ technical field ] A method for producing a semiconductor device

The present invention relates to power tools, and more particularly to a power tool having an auxiliary handle member.

[ background of the invention ]

The electric tool of the slotting type is mainly applied to the industries of decoration, construction and the like, and is used for processing and slotting the surfaces of walls, floors and the like so as to arrange electric wires or water pipes and the like. During the work of this type of electric power tool, the operator performs the work by gripping the grip portion at the rear end, however, since the body of the grooving machine is heavy, the grooving machine is operated with only one hand, and the use is very inconvenient for the user.

An improvement to the above structure is disclosed in US9009982B1, published on 21.04.2015, which discloses a cutting tool including a detachable auxiliary handle and a threaded handle aperture disposed at the working end of the housing, the auxiliary handle being attached within the threaded handle aperture to provide an auxiliary grip for the operator during use. According to the technical scheme, the auxiliary handle is adopted to provide extra holding so as to improve the stability and facilitate the balance and control of the cutting tool, but when the auxiliary handle is screwed into the threaded handle hole, a large amount of time is consumed, and the installation and the disassembly are inconvenient; meanwhile, the auxiliary handle can only be fixedly arranged at one angle, and the operation requirements of different users cannot be met.

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

[ summary of the invention ]

In view of the shortcomings of the prior art, the invention aims to provide an auxiliary handle member which is adjustable in multiple angles and comfortable to operate and an electric tool with the auxiliary handle member.

The invention can adopt the following technical scheme to solve the problems in the prior art: an auxiliary handle member connected to a power tool, the auxiliary handle member including a handle portion extending in an axial direction and a fixing part connected to one end of the handle portion in the axial direction, the fixing part connecting the auxiliary handle member to the power tool; the auxiliary handle member further includes an adjustment member located between the fixing member and the power tool, the adjustment member having a locked state and an unlocked state, the adjustment member abutting against the fixing member when the adjustment member is in the locked state to fix the fixing member to the power tool; when the adjusting component is in the unlocking state, the adjusting component is separated from the fixing component and keeps the unlocking state, so that the fixing component can freely rotate relative to the electric tool.

The further improvement scheme is as follows: the adjusting part is provided with a button arranged in the fixing part and a first elastic element for biasing the button, one end of the first elastic element is abutted against the button, and the other end of the first elastic element is abutted against the outer wall of the electric tool.

The further improvement scheme is as follows: the fixing part is provided with a connecting sleeve extending along the axial direction and being cylindrical, and a clamping pin and a supporting wall which are respectively located at two ends of the connecting sleeve in the axial direction, the clamping pin extends outwards from the periphery of the connecting sleeve and is inserted into the electric tool, the supporting wall extends inwards from the inner wall of the connecting sleeve to form, and the button is contained in the connecting sleeve and is abutted against the supporting wall through the first elastic element.

The further improvement scheme is as follows: the button is provided with a pressing part protruding out of the fixing part, a connecting part axially extending from the pressing part and a concave part sunken from the inner wall of the connecting part, the adjusting part is provided with a support column fixed on the electric tool and a first rolling body installed in the support column, and the first rolling body is in shape locking with the concave part.

The further improvement scheme is as follows: the pillar is provided with a second groove which is inwards sunken from the end face, the adjusting part is provided with a lock button which is contained in the second groove, a second rolling body which is arranged in the pillar and a second elastic element which is positioned between the lock button and the pillar, one end of the second elastic element is connected with the bottom surface of the second groove in an abutting mode, the other end of the second elastic element is connected with the inner wall surface of the lock button in an abutting mode, the lock button is provided with a transition groove which is inwards sunken from the periphery, and the second rolling body is contained in the transition groove.

The further improvement scheme is as follows: the adjusting component is provided with a third elastic element contained in the support column, the first rolling body and the second rolling body are respectively positioned at two ends of the third elastic element, the support column is provided with a through hole penetrating through the side wall and communicated with the second groove, and the first rolling body, the third elastic element and the second rolling body are contained in the through hole.

The further improvement scheme is as follows: when the adjusting part is in the locking state, the first rolling body is separated from the concave part and is abutted against the inner wall surface of the connecting part, the second rolling body is separated from the transition groove and is abutted against the outer wall surface of the lock knob, and the first elastic element is in a first compression state.

The further improvement scheme is as follows: when the adjusting component is in the unlocking state, the first rolling body is locked in the concave part in the radial direction, the first elastic element is in a second compression state, and the resilience force of the first elastic element in the second compression state is larger than that of the first elastic element in the first compression state.

The further improvement scheme is as follows: when the adjusting component is switched from the locking state to the unlocking state, the first elastic element is compressed to a third compression state and then rebounds to the first compression state, the resilience force of the first elastic element in the third compression state is larger than that of the first elastic element in the second compression state, the second rolling element is pressed into the transition groove, the second elastic element is compressed to have the resilience force, the first rolling element is separated from the concave part through the resilience force of the first elastic element in the third compression state, and the second rolling element is separated from the transition groove through the resilience force of the second elastic element.

The further improvement scheme is as follows: the button is provided with a clamping wing which protrudes outwards from the periphery of the pressing part, the fixing part is provided with a clamping groove which protrudes inwards from the inside of the supporting wall, and the clamping wing and the clamping groove are locked in shape.

The invention can also adopt the following technical scheme for solving the problems in the prior art: a power tool includes a shield assembly and an auxiliary handle member connected to the shield assembly; the auxiliary handle member includes a handle portion, a fixing part connected to the handle portion, and an adjustment part between the fixing part and the shield assembly, the fixing part and the adjustment part locking the auxiliary handle member to the shield assembly, the fixing part rotating relative to the shield assembly when the adjustment part is pressed relative to the fixing part.

Compared with the prior art, the invention has the following beneficial effects: the fixing component can be conveniently controlled to be in the locking state or the unlocking state by pressing the adjusting component, so that an operator can conveniently switch the angle of the auxiliary handle component, and the operation is simpler. Meanwhile, when the adjusting component is in the unlocking state, the first rolling body is locked in the concave part, so that the adjusting component can be kept in the unlocking state, an operator does not need to press the adjusting component for a long time, and the operator experiences better.

[ description of the drawings ]

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:

fig. 1 is a schematic view of the overall structure of the power tool of the present invention;

FIG. 2 is a schematic view of the power tool of FIG. 1 with the housing removed;

FIG. 3 is a cross-sectional view of the power tool of FIG. 1;

FIG. 4 is a schematic view of the adjustment assembly of the cutting device of FIG. 3 in a first state;

FIG. 5 is a schematic structural view of the adjustment assembly of FIG. 4 in another state;

FIG. 6 is a schematic view of the shaft locking mechanism of the cutting device shown in FIG. 3;

FIG. 7 is a schematic view of the outer sleeve of the adjustment assembly of FIG. 4;

FIG. 8 is a schematic view of the connection of the inner sleeve and the outer sleeve of the adjustment assembly of FIG. 4;

FIG. 9 is an exploded view of an auxiliary handle member of the power tool of FIG. 1;

FIG. 10 is a schematic view of the structure of the auxiliary handle member of FIG. 9 in which the push button is engaged with the second fixing portion;

FIG. 11 is a cross-sectional view of the adjustment member of FIG. 9 in a locked condition;

FIG. 12 is a cross-sectional view of the adjustment member of FIG. 9 in an unlocked state;

fig. 13 is a cross-sectional view of the adjustment member of fig. 9 in a switching intermediate state.

Electric tool 100 casing 1

Grip portion 12 of main body case 11

Head housing 13 head housing cover 14

Air inlet 15 and air outlet 16

Motor assembly 2 rotating shaft 21

Output shaft 4 of speed reducing mechanism 3

Inner pressure plate 51 of adjusting component 5

Base 511 first mounting portion 512

Second mounting 513 outer platen 52

Third mounting portion 522 of locking portion 521

Cutting blade 53 first cutting blade 531

Second cutting blade 532 sleeve assembly 54

First clamping piece 541 first substrate 5411

First connection portion 5412 fixing hole 5413

Second clamp 542 second substrate 5421

Second connection portion 5422 identification 5423

Indicator 5424 shroud assembly 6

Cover 62 of insertion groove 61

Band 63 assists handle member 7

First fixing part 72 of handle part 71

Bent portion 73 and second fixing portion 74

Connecting sleeve 741 clamping pin 742

Support wall 743 clamping groove 744

Push button 75 pressing part 751

Connecting part 753 of clamping wing 752

First groove 754 annular groove 755

Recess 756 first resilient element 76

Second groove 771 of post 77

The through hole 772 of the first rolling element 78

Lock button 79 transition groove 791

Third groove 792 lock body 793

Second elastic element 80 second rolling element 81

Third elastic element 82 fan assembly 9

Locking shaft mechanism 101 clamping part 1011

Lock button 1012 spring 1013

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

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," "left," "right," and the like, which indicate orientation or positional relationship, are based only on the orientation or positional relationship shown in the drawings, are merely for convenience in describing the present 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 present invention.

Referring to fig. 1 to 3, an embodiment of the present invention relates to an electric tool 100, and more particularly, to a grooving machine, which is widely used in construction and decoration. This electric tool 100 includes casing 1, install motor element 2 in casing 1, output shaft 4 by motor element 2 driven, connect the reduction gears 3 between motor element 2 and output shaft 4, install in motor element 2's fan unit 9, install in casing 1's guard shield subassembly 6 and connect in output shaft 4's adjusting part 5, adjusting part 5 installs cutting piece 53 to output shaft 4, motor element 2 starts under the effect of power supply, drive reduction gears 3 and drive output shaft 4 operation, in order to drive cutting piece 53 high-speed rotation, carry out the cutting operation.

In this embodiment, the housing 1 includes a main body housing 11 extending in a front-rear direction and having a longitudinal shape, a holding portion 12 extending rearward from the main body housing 11, a head housing 13 connected to a front end of the main body housing 11, and a head housing cover 14 fixedly connected to the head housing 13, the motor assembly 2 is disposed in the main body housing 11, the speed reduction mechanism 3 and the output shaft 4 are disposed in the head housing 13, and a rotating shaft 21 of the motor assembly 2 extends into the head housing 13 and engages with the speed reduction mechanism 3; the output shaft 4 and the rotating shaft 21 are approximately vertically arranged, one end of the output shaft 4 is connected to the speed reducing mechanism 3, the other end of the output shaft 4 extends out of the head shell 13, the output shaft 4 extending out of the head shell 13 is provided with the cutting blade 53 and the adjusting component 5, and the output shaft 4 drives the cutting blade 53 and the adjusting component 5 to operate together.

In the present embodiment, the shield assembly 6 is mounted to an end of the head housing 13 and at least partially surrounds the cutting blade 53 to prevent injury to a user when the cutting blade 53 is operated. As shown in fig. 4, the shield assembly 6 has a housing 63 for receiving the cutting blade 53, a ferrule 63 projecting outwardly from an end face of the housing 63, and a plug-in groove 61 penetrating an end face of the housing 63, the ferrule 63 being fixed to an outer periphery of the head housing cover 14 to fix the shield assembly 6 to the head housing cover 14.

In the present embodiment, the fan assembly 9 is mounted on the rotating shaft 21, the housing 1 is further provided with an air inlet 15 and an air outlet 16, specifically, the air inlet 15 is disposed on the main housing 11, the air outlet 16 is disposed on the head housing 13, the motor assembly 2 drives the fan assembly 9 to operate, and cooling air is sucked through the air inlet 15, flows through the motor assembly 2, and is then discharged from the air outlet 16, so as to better cool the motor assembly 2.

Referring to fig. 4 to 8, the adjusting assembly 5 includes an inner pressing plate 51 connected to the output shaft 4, an outer pressing plate 52 fixing the inner pressing plate 51, and a sleeve assembly 54 mounted on the inner pressing plate 51, the cutting blade 53 includes a first cutting blade 531 mounted on the inner pressing plate 51 and a second cutting blade 532 far from the first cutting blade 531, the first cutting blade 531 and the second cutting blade 532 are spaced apart by a certain distance, and the distance between the outermost sides of the two cutting blades is a cutting width L, and the sleeve assembly 54 connects the first cutting blade 531 and the second cutting blade 532 and adjusts the distance between the first cutting blade 531 and the second cutting blade 532. By arranging the sleeve component 54 between the first cutting blade 531 and the second cutting blade 532, the cutting width L between the first cutting blade 531 and the second cutting blade 532 can be adjusted at will, the applicability of the electric tool 100 is greatly improved, and the diversified requirements of users are met.

Specifically, the sleeve assembly 54 includes a first clamping member 541 connected to the first cutting blade 531 and a second clamping member 542 connected to the second cutting blade 532, and the first clamping member 541 and the second clamping member 542 can be detachably connected in any manner. Specifically, the first clamping member 541 is an inner sleeve, and the second clamping member 542 is an outer sleeve.

Further, the inner sleeve 541 includes a first base plate 5411 connected to the first cutting piece 531 and a first connecting portion 5412 extending from an end surface of the first base plate 5411 toward the outer sleeve 542, the outer sleeve 542 includes a second base plate 5421 connected to the second cutting piece 532 and a second connecting portion 5422 extending from an end surface of the second base plate 5421 toward the inner sleeve 541, the first connecting portion 5412 and the second connecting portion 5422 are detachably and fixedly connected, and the first connecting portion 5412 and the second connecting portion 5422 constitute an adjusting assembly for adjusting a distance between the first cutting piece 531 and the second cutting piece 532. The inner sleeve 541 and the outer sleeve 542 are provided with connecting portions for connecting with each other, so that the inner and outer sleeves can be fixed and detached in a simple manner.

In the present embodiment, the inner sleeve 541 includes a fixing hole 5413 penetrating through the first connecting portion 5412, and a screw passes through the fixing hole 5413 and extends to the second connecting portion 5422 to fix the inner sleeve 541 and the outer sleeve 542 together, and when it is necessary to change the cutting width L, the screw is loosened, and then the distance between the first cutting blade 531 and the second cutting blade 532 is adjusted, and finally the screw is tightened again, and the adjustment can be performed without detaching the outer pressing plate 52, which is simple in structure and easy to operate.

Alternatively, the first connection portion 5412 has a first thread and the second connection portion 5422 has a second thread, and the two connection portions are connected together via the threads.

Referring to fig. 7 and 8, the second connecting portion 5422 is located inside the first connecting portion 5412, and further, the outer sleeve 542 further includes an indicating line 5424 disposed on the outer peripheral wall of the second connecting portion 5422 and a mark 5423 corresponding to the indicating line 5424, wherein the indicating line 5424 has a plurality of lines and is spaced along the axis of the output shaft 4. By providing the indication line 5424 and the mark 5423 on the second connection portion 5422 of the outer sleeve 542, the cutting width L between the first cutting blade 531 and the second cutting blade 532 is accurately displayed to the user, and the user is more intuitive when adjusting the cutting width L and has good user experience.

In the present embodiment, the marks 5423 are provided in plurality and are distributed at intervals along the circumference of the second connecting portion 5422; and the indication line 5424 is an entire outer circumferential wall surrounding the second connection portion 5422 so that the user can view the indication line 5424 at an arbitrary angle.

Referring to fig. 4 and 5, a sum of the thickness of the first cut piece 531, the thickness of the first substrate 5411, and the length of the first connection portion 5412 is L1, a sum of the thickness of the second cut piece 532, the thickness of the second substrate 5421, and the length of the second connection portion 5422 is L2, and a distance between an end of the first connection portion 5412 and an end of the second connection portion 5422 is L3, wherein values of L1 and L2 are fixed, a value of L3 is changed according to position adjustment of the cut pieces, a cutting width L is L1+ L2-L3, and a numerical value of the indication line 5424 and the mark 5423 is calculated according to the formula.

In the present embodiment, the inner pressing plate 51 includes a base portion 511 connected to the output shaft 4, a first mounting portion 512 extending from an end of the base portion 511 in an axial direction of the output shaft 4, and a second mounting portion 513 extending from an end surface of the base portion 511 outward in a radial direction of the output shaft 4, and the first cutting piece 531, the inner sleeve 541, the second cutting piece 532, and the outer sleeve 542 are all fitted around an outer circumference of the first mounting portion 512 and mounted on the first mounting portion 512.

In the present embodiment, the outer pressing plate 52 includes a locking portion 521 abutting against the first mounting portion 512 and a third mounting portion 522 extending from an end surface of the locking portion 521 toward the base 511, the third mounting portion 522 is located inside the first mounting portion 512, and the third mounting portion 522 is fixed to the output shaft 4. Specifically, the inner wall surface of the third mounting portion 522 close to the output shaft 4 is provided with a first thread, the outer circumferential surface of the corresponding output shaft 4 is provided with a second thread, and the locking portion 521 of the outer pressing plate 52 abuts against the first mounting portion 512 of the inner pressing plate 51 and locks the inner pressing plate 51 to the output shaft 4 through threaded connection.

Referring to fig. 4 and 5, the first base plate 5411, the first cutting piece 531 and the second mounting portion 513 are fixed together by screws, the second base plate 5421 and the second cutting piece 532 are also fixed together by screws, and the first connecting portion 5412 of the inner sleeve 541 and the second connecting portion 5422 of the outer sleeve 542 are also fixed since the inner pressing plate 51 is fixed to the output shaft 4, the first cutting piece 531 and the second cutting piece 532 can maintain a stable state.

In the present embodiment, the first cutting blade 531, the second cutting blade 532, the inner sleeve 541, and the outer sleeve 542 are located between the second mounting portion 513 and the locking portion 521 in the axial direction of the output shaft 4.

As shown in fig. 6, the electric tool 100 further includes a shaft locking mechanism 101 connected to the speed reducing mechanism 3, and the speed reducing mechanism 3 includes an inwardly recessed slot; the shaft locking mechanism 101 includes a locking portion 1011 extending into the slot, a locking button 1012 connected to the end of the locking portion 1011, and a spring 1013 for biasing the locking button 1012, wherein the locking button 1012 extends to the outside of the housing 1 for the user to press; the user presses the lock button 1012 against the force of the spring 1013, and drives the locking portion 1011 to be locked in the locking slot, and then the adjusting assembly 5 can be detached.

Referring to fig. 9-11, the power tool 100 further includes an auxiliary handle member 7 connected to the shield assembly 6, the auxiliary handle member 7 being used to provide an additional grip for an operator to control the power tool 100.

Specifically, the auxiliary handle member 7 includes a handle portion 71 extending in the axial direction, a fixing part connected to one end of the handle portion 71 in the axial direction, and an adjusting part located between the fixing part and the shield assembly, the fixing part and the adjusting part locking the auxiliary handle member 7 to the shield assembly 6, the adjusting part being pressed, the fixing part being rotatable relative to the shield assembly 6.

Specifically, the adjustment member has a locked state and an unlocked state. When the adjusting part is in a locked state, the adjusting part abuts against the fixing part so that the fixing part is fixed to the shield assembly 6; when the adjustment member is in the unlocked state, the adjustment member disengages the fixed member and remains in the unlocked state so that the fixed member is free to move relative to the shield assembly 6, i.e., can rotate about an axis parallel to the output shaft 4.

In the present embodiment, the handle portion 71 is located above the shield assembly 6, and prevents the operator from accidentally touching the cutter blade 53. As shown in fig. 1 and 2, the handle 71 is located at the front end of the main body housing 11 and is disposed substantially perpendicular to the rotation shaft 21, and the operator can hold the handle 71 at the front end with one hand and the grip 12 at the rear end with the other hand, thereby alleviating hand fatigue caused by forward tilting of the center of gravity of the electric power tool.

In the present embodiment, the fixing member includes a first fixing portion 72 connected to the handle portion 71, a second fixing portion 74 connected to the shield assembly 6, and a bent portion 73 located between the first fixing portion 72 and the second fixing portion 74, the handle portion 71 is screwed to the first fixing portion 72, and is connected to the shield assembly 6 via the bent portion 73 and the second fixing portion 74, and the handle portion 71 is rotatable above the shield assembly 6 without interfering with the shield assembly 6.

Specifically, the second fixing portion 74 includes a cylindrical connecting sleeve 741 extending in the axial direction, clamping legs 742 respectively located at two ends of the connecting sleeve 741 in the axial direction, a supporting wall 743, and a plurality of clamping grooves 744 recessed inward from the inside of the supporting wall 743. The engaging leg 742 protrudes outward from the outer circumference of the connecting sleeve 741 and is inserted into the insertion groove 61, and the supporting wall 743 extends inward from the inner wall of the connecting sleeve 741. The clamping pins 742 are simple and convenient to mount and dismount in a clamping and buckling mode.

In the present embodiment, the adjusting member includes a push button 75 installed in the connecting sleeve 741, a first elastic member 76 biasing the push button 75, a support post 77 fixed to the cover 62, a first rolling body 78, a second rolling body 81, and a third elastic member 82 installed in the support post 77, a lock knob 79 housed in the support post 77, and a second elastic member 80 located between the lock knob 79 and the support post 77.

Specifically, the push button 75 has a pressing portion 751 protruding out of the surface of the connecting sleeve 741, a catch 752 protruding radially outward from the outer periphery of the pressing portion 751, a connecting portion 753 extending axially from the pressing portion 751, an annular groove 755 formed between the pressing portion 751 and the connecting portion 753, a first groove 754 recessed inward from the end face of the connecting portion 753, and a recess 756 recessed from the inner wall of the connecting portion 753. The locking wings 752 are received in the locking slots 744 and form-fit with the locking slots 744 to prevent the fixing member from shifting. Meanwhile, the first elastic element 76 is accommodated in the annular groove 755, one end of the first elastic element abuts against the pressing portion 751, the other end abuts against the outer wall of the cover 62, and the first elastic element 76 is in a first compressed state. The first elastic member 76 presses the pressing portion 751 toward the support wall 743, so that the clip 741 abuts against the inner wall of the cover 62, and the fixing member is held stationary with respect to the shield assembly 6. The first groove 754 is fitted around the outer circumference of the pillar 77, and the push button 75 can slide along the outer circumference of the pillar 77 by pressing the pressing portion 751, thereby guiding the push button 75.

In this embodiment, the post 77 has a second recess 771 recessed inward from the end surface and a through hole 772 penetrating the sidewall of the post 77 and communicating with the second recess 771, and the second elastic element 80 is located between the post 77 and the lock knob 79, and has one end abutting against the bottom surface of the second recess 771 and the other end abutting against the inner wall surface of the lock knob 79. Lock button 79 is slidable along the inner wall of post 77. The first rolling body 78, the third elastic element 82 and the second rolling body 81 are all accommodated in the through hole 722, the third elastic element 82 makes the first rolling body 78 abut against the inner wall of the connecting part 753, and makes the second rolling body abut against the outer wall of the lock knob 79, and at this time, the third elastic element 82 is in a pre-pressing state.

In the present embodiment, the lock knob 79 is mounted in a receiving cavity formed by the push button 75 and the post 77, the lock knob 79 has a cylindrical lock body 793, a transition groove 791 recessed inward from the outer periphery of the lock body 793, and a third recess 792 recessed inward from the end surface, and the second elastic member 80 is received in the third recess 792 and guided by the inner wall of the lock body 793. One end of the second elastic element 80 abuts against the bottom surface of the second groove 771, and the other end abuts against the inner wall surface of the lock body 793, at this time, the second elastic element 80 is in a non-pre-compressed state.

As shown in fig. 11, when the adjusting member is in the locked state, the pressing portion 751 and the supporting wall 743 are biased by the first elastic element 76, so that the two are away from the shield assembly 6 and closely abut against each other, and at the same time, the clamping wings 752 are locked in the clamping grooves 744.

Specifically, the first rolling elements 78 are disengaged from the concave portions 756 and abut against the inner wall surface of the connecting portion 753, and the second rolling elements 81 are disengaged from the transition grooves 791 and abut against the outer wall surface of the lock body 793, at which time the first elastic element 76 is in the initial first pressed state, the second elastic element 80 is in the non-pressed state, and the third elastic element 82 is in the pre-pressed state.

As shown in fig. 12, when the operator adjusts the angle of the auxiliary handle member 7, the pressing portion 751 is pressed, the connecting portion 753 slides along the outer peripheral surface of the pillar 77 in the direction of the shroud assembly 6 against the resilient force of the first elastic member 76, and the third elastic member 80 biases the first rolling body 78 toward the connecting portion 753 until the first rolling body 78 is radially locked into the recess 756, so that the adjustment member is in the unlocked state as shown in fig. 12, that is, the fixing member is free to rotate, and a comfortable grip angle is switched. At this time, the third elastic element 80 is in a non-preloaded state. Specifically, the locking wings 752 are away from the locking slots 744 and have a gap with the inner wall of the support walls 743. The first rolling bodies 78 and the concave portion 756 may maintain the adjustment member in the unlocked state until the operator presses the pressing portion 751 again to switch. At this time, the first elastic element 76 is in a second compressed state in which the resilient force of the first elastic element 76 is greater than that of the first elastic element 76 in the first compressed state. The lock button 79 has a gap with the inner wall of the pressing portion 751, and the second elastic element 80 is in a non-compressed state.

Referring to fig. 13, when the adjusting member is switched from the unlocked state to the locked state, the pressing portion 751 is pressed again, the inner wall of the pressing portion 751 engages and moves the lock button 79 toward the shield assembly 6, the second elastic element 80 is biased to the pressed state, so that the second rolling elements 78 slide into the transition grooves 791, the first rolling elements 78 are separated from the concave portions 756, and the adjusting member is in the switching intermediate state as shown in fig. 13. At this time, the first elastic element 76 is in the third compressed state and the third elastic element 82 is in the non-pre-stressed state. Since the resilience in the third compressed state of the first elastic element 76 is much greater than the resilience in the compressed state of the second elastic element 80. When the operator releases the pressing part 751, the first elastic element 76 rapidly rebounds from the third pressing state to the first pressing state, the connecting part 753 slides away from the shield assembly 6, and the first rolling body 78 cannot be pushed into the concave part 756 again when the connecting part 753 slides over the position of the first rolling body 78 due to the non-compression state of the third elastic element 82; meanwhile, when the second elastic element 80 rebounds to a non-compressed state, the second rolling element 81 is driven to slide out of the transition groove 791.

According to the invention, the fixing component can be conveniently controlled to enter the locking state or the unlocking state by pressing the adjusting component, so that an operator can conveniently switch the angle of the auxiliary handle component 7, and the operation is simpler; meanwhile, when the adjusting component is in the locked state, the first rolling body 78 is locked in the concave portion 756, so that the adjusting component can be kept in the unlocked state, an operator does not need to press the adjusting component for a long time, and the experience of the operator is better.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that numerous other alternatives to the auxiliary handle member and the power tool of the present invention can be devised 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 (11)

1. An auxiliary handle member connected to a power tool, the auxiliary handle member including a handle portion extending in an axial direction and a fixing part connected to one end of the handle portion in the axial direction, the fixing part connecting the auxiliary handle member to the power tool; the method is characterized in that: the auxiliary handle member further includes an adjustment member positioned between the fixing member and the power tool, the adjustment member having a locked state and an unlocked state, the adjustment member abutting the fixing member when the adjustment member is in the locked state to fix the fixing member to the power tool; when the adjusting component is in the unlocking state, the adjusting component is separated from the fixing component and keeps the unlocking state, so that the fixing component can freely rotate relative to the electric tool.

2. The auxiliary handle member as recited in claim 1, wherein: the adjusting part is provided with a button arranged in the fixing part and a first elastic element for biasing the button, one end of the first elastic element is abutted against the button, and the other end of the first elastic element is abutted against the outer wall of the electric tool.

3. An auxiliary handle member as claimed in claim 2, wherein: the fixing part is provided with a connecting sleeve extending along the axial direction and being cylindrical, and a clamping pin and a supporting wall which are respectively located at two ends of the connecting sleeve in the axial direction, the clamping pin extends outwards from the periphery of the connecting sleeve and is inserted into the electric tool, the supporting wall extends inwards from the inner wall of the connecting sleeve to form, and the button is contained in the connecting sleeve and is abutted against the supporting wall through the first elastic element.

4. An auxiliary handle member as claimed in claim 2, wherein: the button is provided with a pressing part protruding out of the fixing part, a connecting part axially extending from the pressing part and a concave part sunken from the inner wall of the connecting part, the adjusting part is provided with a support column fixed on the electric tool and a first rolling body installed in the support column, and the first rolling body is in shape locking with the concave part.

5. An auxiliary handle member as claimed in claim 4, wherein: the pillar is provided with a second groove which is inwards sunken from the end face, the adjusting part is provided with a lock button which is contained in the second groove, a second rolling body which is arranged in the pillar and a second elastic element which is positioned between the lock button and the pillar, one end of the second elastic element is connected with the bottom surface of the second groove in an abutting mode, the other end of the second elastic element is connected with the inner wall surface of the lock button in an abutting mode, the lock button is provided with a transition groove which is inwards sunken from the periphery, and the second rolling body is contained in the transition groove.

6. An auxiliary handle member as claimed in claim 5, wherein: the adjusting component is provided with a third elastic element contained in the support column, the first rolling body and the second rolling body are respectively positioned at two ends of the third elastic element, the support column is provided with a through hole penetrating through the side wall and communicated with the second groove, and the first rolling body, the third elastic element and the second rolling body are contained in the through hole.

7. An auxiliary handle member as claimed in claim 5, wherein: when the adjusting part is in the locking state, the first rolling body is separated from the concave part and is abutted against the inner wall surface of the connecting part, the second rolling body is separated from the transition groove and is abutted against the outer wall surface of the lock knob, and the first elastic element is in a first compression state.

8. An auxiliary handle member as claimed in claim 7, wherein: when the adjusting component is in the unlocking state, the first rolling body is locked in the concave part in the radial direction, the first elastic element is in a second compression state, and the resilience force of the first elastic element in the second compression state is larger than that of the first elastic element in the first compression state.

9. An auxiliary handle member as claimed in claim 8, wherein: when the adjusting component is switched from the locking state to the unlocking state, the first elastic element is compressed to a third compression state and then rebounds to the first compression state, the resilience force of the first elastic element in the third compression state is larger than that of the first elastic element in the second compression state, the second rolling element is pressed into the transition groove, the second elastic element is compressed to have the resilience force, the first rolling element is separated from the concave part through the resilience force of the first elastic element in the third compression state, and the second rolling element is separated from the transition groove through the resilience force of the second elastic element.

10. An auxiliary handle member as claimed in claim 3, wherein: the button is provided with a clamping wing which protrudes outwards from the periphery of the pressing part, the fixing part is provided with a clamping groove which is inwards recessed from the inside of the supporting wall, and the clamping wing and the clamping groove are locked in shape.

11. A power tool comprising a shield assembly and an auxiliary handle member connected to the shield assembly; the method is characterized in that: the auxiliary handle member includes a handle portion, a fixing part connected to the handle portion, and an adjustment part located between the fixing part and the shield assembly, the fixing part and the adjustment part locking the auxiliary handle member to the shield assembly, the fixing part rotating relative to the shield assembly when the adjustment part is pressed relative to the fixing part.

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