CN210589115U

CN210589115U - Accessory for auxiliary handle

Info

Publication number: CN210589115U
Application number: CN201921077027.5U
Authority: CN
Inventors: 闫明星; 胡瑞红
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2018-09-20
Filing date: 2019-07-10
Publication date: 2020-05-22
Anticipated expiration: 2029-07-10

Abstract

The utility model relates to an auxiliary handle accessory. The electric tool comprises a holding unit and a connecting unit used for detachably connecting the holding unit to the electric tool, wherein the locking state of the connecting unit is not changed due to the operation of the holding unit. The auxiliary handle accessory has the advantages that the locking state of the connecting unit is not changed due to the operation of the holding unit, so that the locking state of the connecting unit is not changed when the holding posture of the holding unit is adjusted. Thereby ensuring the connection between the holding unit and the electric tool to be firm.

Description

Accessory for auxiliary handle

Technical Field

The utility model relates to an electric tool technical field especially relates to auxiliary handle annex.

Background

Auxiliary handle attachments for power tools generally include a grip unit and a connection unit for removably connecting the grip unit to the power tool. During the use of the electric tool, the holding posture of the holding unit is often required to be adjusted. When the holding posture is adjusted, the corresponding mechanism of the connecting unit may be touched, so that the locking state of the connecting unit is changed, namely, the locking state is changed into the releasing state, and the normal use of the electric tool is affected.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide an auxiliary handle attachment in order to solve the problem that the locked state of the connection unit is easily changed by the operation of the grip unit.

The utility model provides an auxiliary handle annex, includes the unit of gripping to and be used for dismantling the connection unit who connects in electric tool with the auxiliary handle annex, the connection unit includes locking state and release state, when the connection unit is in locking state, the auxiliary handle annex is connected with electric tool relatively fixed, when the connection unit is in the release state, the auxiliary handle annex separates with electric tool, the locking state of connection unit is not because of right the operation of the unit of gripping changes.

The auxiliary handle accessory has the advantages that the locking state of the connecting unit is not changed due to the operation of the holding unit, so that the locking state of the connecting unit is not changed when the holding posture of the holding unit is adjusted. Thereby ensuring the connection between the holding unit and the electric tool to be firm.

In one embodiment, the gripping unit has a gripping axis, and the operation on the gripping unit is to apply a force to the gripping unit in a rotational direction around the gripping axis.

In one embodiment, the connection unit comprises a locking mechanism and a driving mechanism for driving the locking mechanism to move, the driving mechanism is connected to the holding unit, the auxiliary handle accessory further comprises a trigger safety switch, and the trigger safety switch is provided with a first working position for limiting the movement of the locking mechanism and a second working position for releasing the limitation.

In one embodiment, the trigger safety switch is disposed on the locking mechanism, wherein in the first working position, the trigger safety switch limits the driving mechanism to drive the locking mechanism to move, and in the second working position, the driving mechanism can drive the locking mechanism to move.

In one embodiment, the triggering safety switch is arranged on one side of the driving mechanism far away from the holding unit, wherein in the first working position, the triggering safety switch limits the driving mechanism to drive the locking mechanism to move, and in the second working position, the driving mechanism can drive the locking mechanism to move.

In one embodiment, the trigger safety switch is disposed between the driving mechanism and the holding unit, wherein in the first working position, the trigger safety switch isolates the driving mechanism from the holding unit.

In one embodiment, the connection unit comprises a locking mechanism and a driving mechanism for driving the locking mechanism to move, the auxiliary handle accessory further comprises a supporting unit, the holding unit, the driving mechanism and the locking mechanism are respectively arranged on two sides of the supporting unit, a part of the supporting unit, which is located between the holding unit and the driving mechanism, forms an isolation unit, and the isolation unit is used for avoiding the operation of the holding unit to trigger the driving mechanism to operate.

In one embodiment, the holding unit is detachably connected to the supporting unit.

In one embodiment, the locking mechanism comprises a first clamping member and a second clamping member, and the driving mechanism can adjust the distance between the first clamping member and the second clamping member.

In one embodiment, the driving mechanism adjusts the distance between the first clamping piece and the second clamping piece through rotating fit with the supporting unit, and a rotation stopping structure is arranged between the second clamping piece and the supporting unit.

In one embodiment, the first clamping member is fixedly connected with the supporting unit, and the driving mechanism can drive the second clamping member to move.

In one embodiment, the driving mechanism is a knob, the knob is provided with an accommodating cavity, a knob nut is fixedly arranged in the accommodating cavity and is in threaded connection with the supporting unit, and the knob can drive the knob nut to rotate relative to the supporting unit to drive the second clamping piece to linearly reciprocate along the supporting unit.

In one embodiment, the second clamping member comprises a clamping portion and a stopping portion, the stopping portion is received by the receiving cavity, a clamping block extending into the receiving cavity is arranged on the knob, the movement of the stopping portion towards the direction close to the first clamping member is limited by the clamping block, and the movement of the stopping portion towards the direction far away from the first clamping member is limited by the knob nut.

In one embodiment, the stop part is provided with a convex structure, the fixture block abuts against the convex structure, and the free end of the stop part abuts against the knob nut through a washer.

In one embodiment, the second clamping member includes a clamping portion and a stopping portion, the stopping portion is received by a receiving cavity, a plurality of first positioning portions are arranged at a port of the receiving cavity at intervals along the circumferential direction of the knob, a second positioning portion is further arranged in the receiving cavity, the movement of the stopping portion in the direction close to the first clamping member is limited by the first positioning portions, and the movement of the stopping portion in the direction away from the first clamping member is limited by the second positioning portions.

In one embodiment, one end of the stopper abuts against the first positioning portion, and the other end of the stopper abuts against the second positioning portion through a gasket.

In one embodiment, at least two sub covers capable of being mutually buckled together are arranged at a port of the accommodating cavity, a third positioning part is formed on a part, located at the port of the accommodating cavity, of each sub cover, the part, extending into the accommodating cavity, of each sub cover is fixed relative to the knob, a second positioning part is further arranged in the accommodating cavity, the movement of the stop part towards the direction close to the first clamping piece is limited by the third positioning part, and the movement of the stop part towards the direction far away from the first clamping piece is limited by the second positioning part.

In one embodiment, the sub cover is provided with a screw connecting portion, one end of the knob is provided with a screw hole, a screw is arranged in the screw hole, and the sub cover is connected with the screw through the screw connecting portion to be fixed relative to the knob.

In one embodiment, a plurality of guide ribs are arranged in the accommodating cavity along the circumferential direction, each guide rib corresponds to each screw hole one by one, and the sub-cover is provided with a rotation stopping groove for accommodating the guide ribs.

In one embodiment, the adjacent two sub-covers are clamped and positioned with each other by arranging a positioning block and a positioning groove for accommodating the positioning block.

In one embodiment, one end of the stopper portion abuts against the third positioning portion, and the other end of the stopper portion abuts against the second positioning portion through a gasket.

In one embodiment, the stopper is provided with a washer positioning portion for positioning the washer.

In one embodiment, the outer surface of the knob is circumferentially provided with an anti-slip structure.

Drawings

FIG. 1 is a schematic view of an accessory handle according to an embodiment of the present invention;

FIG. 2 is a schematic view of an accessory handle according to another embodiment of the present invention;

FIG. 3 is an exploded view of the auxiliary handle attachment of FIG. 2;

FIG. 4 is a schematic view of an accessory handle according to yet another embodiment of the present invention;

FIG. 5 is a schematic view of the rear end of the knob of the auxiliary handle attachment shown in FIG. 4 with a screw disposed thereon;

fig. 6 is an exploded view of the auxiliary handle attachment of fig. 4.

Wherein:

100. auxiliary handle attachment 110, grip unit 111, and handle

112. Handle nut 120, connecting unit 121, first clamping piece

122. A second clamping piece 122a, a clamping part 122b and a stopping part

122c, a gasket positioning part 122d, a convex structure 123 and a knob

123a, a first positioning part 123b, a second positioning part 123c, and a containing cavity

123d, anti-skidding structure 123e, guide rib 123f, screw hole

124. Knob nut 125, fixture block 126, washer

128. End cap 128a, third positioning part 128b and screw connection part

128c, a rotation stopping groove 128d, a positioning block 128e and a positioning groove

128f, a containing groove 129a, a positioning pin 129b and a rotation stopping pin

129c, screw 130, support unit

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

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

The auxiliary handle attachment 100 of the embodiment of the present invention is adapted to be detachably connected to an electric tool, and includes a holding unit 110 and a connecting unit 120, wherein the connecting unit 120 includes a locking mechanism and a driving mechanism, and the driving mechanism is adapted to drive at least a portion of the locking mechanism to move, so that the locking mechanism has a locking state and a releasing state; the locking mechanism is in a locked state and is capable of relatively fixedly coupling the auxiliary handle attachment 100 to the power tool. The locking mechanism is in a released state, enabling the auxiliary handle attachment 100 to be detached from the power tool and thus detached therefrom. The driving mechanism and at least a part of the locking mechanism are provided separately from the grip unit 110 so that the locked state of the locking mechanism is not changed by the operation of the grip unit 110.

The above-mentioned operation of the holding unit 110 may include various ways, for example, the operation of the holding unit 110 may be online maintenance of the holding unit 110, or the holding unit may have a holding axis, and the operation of the holding unit may be to apply a force to the holding unit in a rotating direction around the holding axis.

When it is desired to connect the auxiliary handle attachment 100 of the present invention to a power tool, the connection unit 120 can be connected to the power tool and locked. Thus, the grip unit 110 is relatively fixed to the power tool. At this time, the locking state of the connection unit 120 is not changed by operating the grip unit 110. Therefore, the situation that the holding posture of the holding unit 110 is changed to cause the auxiliary handle accessory 100 to be loosened from the electric tool integrally and influence the normal use of the electric tool can be avoided.

When the utility model discloses an auxiliary handle annex 100 and electric tool separation need will, can adjust connecting element 120 to the release state, connecting element 120 can separate with electric tool, and then realizes that auxiliary handle annex 100 is whole to separate with electric tool. The connection unit 120 may include a locking mechanism and a driving mechanism for driving the locking mechanism to move. The specific structure of the driving mechanism can be matched according to the specific structure of the locking mechanism. The locking mechanism may be any known mechanism as long as the grip unit 110 can be fixed to the power tool after locking.

The auxiliary handle attachment 100 has a longitudinal axis, the grip unit 110 is located at one end of the auxiliary handle attachment 100 along the longitudinal axis, and the locking mechanism is located at the other end of the auxiliary handle attachment 100 opposite the grip unit 110.

The drive mechanism may be connected to the grip unit. It is also possible that the drive mechanism is separate from the gripping unit, i.e. not connected to each other.

When the driving mechanism is connected to the holding unit, the auxiliary handle attachment further includes a trigger safety switch having a first operating position that restricts movement of the locking mechanism and a second operating position that releases the restriction.

The research of utility model people finds, among the conventional art, the reason that the operation to the unit of gripping can trigger actuating mechanism operation by mistake probably is manifold. One of the reasons for false triggering is: although the driving mechanism is connected to the holding unit, the driving mechanism and the holding unit are not in linkage relation. The driving mechanism is easily triggered and driven when the holding unit is operated only because the driving mechanism is closer to the holding unit. Therefore, in an embodiment of the present invention, the trigger safety switch is disposed between the driving mechanism and the holding unit. When the handle unit is in the first working position, the driving mechanism is separated from the handle unit by the trigger safety switch. Specifically, the triggering safety switch may be an openable and closable isolation cover. In the first operating position, the cage encloses the drive mechanism therein. The drive mechanism can be isolated from the holding unit by an isolation cover. So that the drive mechanism cannot be touched when the grip unit is operated. The state of the locking mechanism is not changed. When the driving mechanism needs to be used, the isolation cover can be adjusted to the second working position, namely the isolation cover is opened, and then the driving mechanism can be operated.

In the conventional technology, another reason for generating the false triggering phenomenon is as follows: conventional accessory handles have a linkage mechanism formed by the drive mechanism and the grip unit such that operation of the grip unit triggers operation of the drive mechanism. Therefore, in an embodiment of the present invention, the triggering safety switch is disposed on the locking mechanism, wherein in the first operating position, the triggering safety switch limits the driving mechanism to drive the locking mechanism to switch the operating state, and in the second operating position, the driving mechanism can drive the locking mechanism to switch the operating state. For example, if the driving mechanism is a rotary driving mechanism, the trigger of the safety switch may be a stop-rotation mechanism. The rotation stopping mechanism is arranged on the locking mechanism. When the rotation-blocking mechanism is in the first operating position, the locking mechanism is blocked, i.e. the state of the locking mechanism cannot be changed by the rotary drive mechanism. When the rotation stopping mechanism is in the second working position, the state of the locking mechanism can be changed through the rotary driving mechanism.

It is understood that the triggering safety switch may also be disposed on the driving mechanism on a side of the driving mechanism away from the holding unit. When the locking mechanism is in the first working position, the driving mechanism can be driven by the driving mechanism to switch the working state. For example, the rotation stopping mechanism is disposed on the rotary driving mechanism and located on a side of the rotary driving mechanism away from the holding unit. When the rotation stopping mechanism is in the first working position, the rotary driving mechanism is stopped, and the state of the locking mechanism cannot be changed. When the rotation stopping mechanism is in the second working position, the state of the locking mechanism can be changed through the rotary driving mechanism.

The trigger safety switch is positioned on one side, far away from the holding unit, of the driving mechanism, so that the trigger safety switch is not easily touched when the holding unit is operated, failure of the trigger safety switch cannot be caused, and the state of the locking mechanism is not influenced by operation actions of the holding unit.

In the following, it will be described how to realize that the operation state of the connecting unit is not changed by the operation of the grip unit in the case where the driving mechanism is separated from the grip unit.

The auxiliary handle accessory 100 further includes a supporting unit 130, the holding unit 110, the driving mechanism and the locking mechanism are respectively disposed on two sides of the supporting unit 130, a portion of the supporting unit 130 located between the holding unit and the driving mechanism forms an isolating unit, and the isolating unit is used for preventing the driving mechanism from being triggered to operate by the operation of the holding unit 110.

Specifically, the supporting unit 130 may be a supporting shaft. The grip unit 110, the locking mechanism, and the driving mechanism are respectively mounted on the support shafts. The support shaft separates and maintains a distance between the grip unit 110 and the driving mechanism, so that there is no transmission relationship between the grip unit 110 and the driving mechanism, and the driving mechanism is prevented from being touched when the grip unit 110 is operated. The region of the support shaft between the grip unit 110 and the driving mechanism is an isolation unit, which serves to isolate the grip unit 110 from the driving mechanism. In this way, it is ensured that the locked state of the connection unit 120 is not changed by the operation of the grip unit 110.

It is understood that the supporting unit 130 may also be two pivoted shafts, and a locking mechanism may be disposed at the pivoted position. In this way the angle between the axes is adjustable. And the angle can be locked by a locking mechanism. The above-mentioned holding unit may be provided on one of the shafts. The locking mechanism and the drive mechanism may be provided on the other shaft. Therefore, the position of the holding unit relative to the locking mechanism can be conveniently adjusted, namely the position of the holding unit relative to the electric tool can be conveniently adjusted.

The connection between the holding unit 110 and the supporting unit 130 may be achieved by detachably connecting the holding unit 110 to the supporting unit 130. For example, the grip unit 110 is a handle 111. The supporting unit 130 may be a supporting shaft. The handle 111 is sleeved at one end of the support shaft, and the handle 111 is detachably connected to the support shaft through a handle nut 112 in threaded connection with the support shaft.

It is understood that the holding unit 110 may also be fixedly connected to the supporting unit 130, for example, by welding the handle 111 to the supporting unit 130.

In this embodiment, the locking mechanism may include a first clamping member 121 and a second clamping member 122. The first and

second clamps

121 and 122 may be hook and the like type clamps. As long as the function of clamping the electric power tool is provided.

The driving mechanism can switch the locking mechanism between the locking state and the releasing state by adjusting the distance between the first clamping member 121 and the second clamping member 122.

When the clamping device is used, the first clamping piece 121 and the second clamping piece 122 are respectively positioned at two sides of the clamping position of the electric tool, and then the distance between the first clamping piece 121 and the second clamping piece 122 is gradually reduced through the driving mechanism until the clamping position of the electric tool is clamped by the first clamping piece 121 and the second clamping piece 122. At this time, the locking mechanism constituted by the first clamp 121 and the second clamp 122 is in a locked state. Accordingly, the grip unit 110 is also fixed to the power tool.

It will be appreciated that the locking mechanism is not limited to the above described embodiments. For example, the locking mechanism may also be a clampband or the like.

In this embodiment, the driving mechanism matching the locking mechanism composed of the first clamping member 121 and the second clamping member 122 may be a rotary driving mechanism. That is, the driving mechanism adjusts the distance between the first clamping member 121 and the second clamping member 122 by rotationally cooperating with the supporting unit 130.

The rotary driving mechanism comprises a knob 123 which can rotate around the longitudinal axis in an operable manner, and a clamping part connected with the second clamping piece 122, wherein the second clamping piece 122 can be driven to move along the longitudinal axis by rotating the knob 123. In other embodiments, the first clamping member can be driven by the driving mechanism, or the first clamping member and the second clamping member can be driven simultaneously to realize the locking and releasing of the locking mechanism.

The knob 123 is provided with a receiving cavity 123c extending in the axial direction. A knob nut 124 is fixedly arranged in the accommodating cavity 123c, and the knob nut 124 is provided with internal threads. The internal thread of the knob nut 124 is engaged with the external thread portion provided to the support shaft. The knob 123 is moved in the axial direction of the support shaft by rotating the knob 123. Because the knob 123 can move along the axial direction of the supporting shaft, the knob 123 drives one of the clamping pieces to move along the axial direction of the supporting shaft, and the distance between the two clamping pieces can be adjusted.

Specifically, as shown in fig. 1, the first clamping member 121 may be sleeved on an end portion of the supporting shaft and fixedly connected to the supporting shaft by inserting the positioning pin 129 a. The second clamping member 122 may be sleeved on the support shaft. The second clamp 122 may include a clamping portion 122a and a stopping portion 122 b. A rotation stop structure may be disposed between the second clamping member 122 and the supporting shaft. The setting mode of the rotation stopping structure is as follows: the second clamp 122 may be provided with a long hole, and the support shaft may be provided with a rotation stop pin 129 b. The end of the rotation stop pin 129b may extend into the elongated hole. A long hole may be provided in the support shaft, and a rotation stop pin 129b inserted through the long hole may be provided in the second clamp 122. The second clamp 122 is prevented from rotating together with the knob 123 by the fitting of the rotation stop pin 129b and the long hole. The stopper 122b of the second clamping member 122 extends into the receiving cavity 123c of the knob 123, and the free end of the stopper 122b abuts against the knob nut 124 through the washer 126. A plurality of latch blocks 125 are radially provided on the knob 123 to extend into the receiving cavity 123 c. The latch 125 abuts against a protrusion 122d provided on the stopper 122b of the second clamping member 122. The stopper 122b of the second clamping member 122 can be relatively fixed in the receiving cavity 123c by the latch 125 and the knob nut 124. Thus, the movement of the stopper 122b toward the first clamping member 121 is restricted by the latch 125, and the movement of the stopper 122b toward the direction away from the first clamping member 121 is restricted by the knob nut 124. When the knob 123 is rotated, the knob 123 may be moved in the axial direction of the support shaft. The second clamping member 122 is movable in the axial direction of the support shaft by the force applied to the stopper portion 122b by the latch 125 or the knob nut 124.

Further, an anti-slip structure 123d may be further disposed on the outer circumference of the knob 123. The anti-slip structure 123d may be an anti-slip pattern.

It is to be understood that the manner of positioning the stopper portion 122b of the second clamp 122 in the knob 123 is not limited to the above-described embodiment.

For example, as shown in fig. 2 and 3, a plurality of first positioning portions 123a may be provided at a port of the housing chamber 123c of the knob 123 at intervals in the circumferential direction of the knob 123. One end surface of the stopper portion 122b of the second clamp 122 abuts against the first positioning portion 123 a. The other end surface of the stopper 122b may abut against a second positioning portion 123b formed in the receiving cavity 123c of the knob 123 through a gasket 126. Thus, the movement of the stopper 122b in the direction approaching the first clamp 121 is restricted by the first positioning portion 123a, and the movement of the stopper 122b in the direction separating from the first clamp 121 is restricted by the second positioning portion 123 b. A plurality of gasket positioning portions 122c for positioning the gasket 126 are provided on the end surface of the stopper portion 122b at intervals in the circumferential direction. The gasket 126 may be mounted in the mounting region formed by each gasket positioning portion 122 c. The gasket positioning portion 122c may be a positioning structure in the form of a hook. The first positioning portion 123a and the second positioning portion 123b may be integrated with the knob 123.

In the above-described structure, the gasket 126 may be first installed in the installation region formed by each gasket positioning portion 122c during assembly. Then, the stopper 122b of the second clamping member 122 can be inserted into the receiving cavity 123c of the knob 123 obliquely from the gap between two adjacent first positioning portions 123 a. The knob 123 and the second clamping member 122 are then fitted together onto the support shaft. When the knob 123 is turned, the knob 123 may move in the axial direction of the support shaft, and the second clamp 122 may move in the axial direction of the support shaft by the force applied to the stopper 122b by the first positioning portion 123a or the second positioning portion 123 b.

The stop 122b of the second clip 122 may also be positioned within the knob 123 in the manner shown in fig. 4-6. An end cap 128 may be disposed at a port of the receiving cavity 123c of the knob 123. The end cap 128 may be split, i.e., include two sub-caps that may be snapped together. The two sub-covers can be clamped and fixed by arranging the positioning block 128d and the positioning groove 128 e. The portion of the sub-cover located at the port of the receiving cavity 123c forms a third positioning portion 128 a. The portion of the sub-cover extending into the receiving cavity 123c may be provided with a plurality of screw coupling portions 128b at intervals along the circumferential direction of the receiving cavity 123 c. A receiving groove 128f may be provided between the screw coupling portion 128b and the third positioning portion 128 a. The receiving groove 128f receives the stopper 122 b. One end of the stopper 122b may abut against the third positioning portion 128a, and the other end of the stopper 122b may abut against the second positioning portion 123b formed in the receiving cavity 123c through the gasket 126. Thus, the movement of the stopper portion 122b in the direction approaching the first clamp 121 is restricted by the third positioning portion 123c, and the movement of the stopper portion 122b in the direction separating from the first clamp 121 is restricted by the second positioning portion 123 b. The screw coupling portion 128b may be coupled to the knob 123 by a screw 129c provided in a screw hole 123f provided at the rear end of the knob 123. The screw 129c can enter the receiving cavity 123c from the rear end of the knob 123 and be connected to the screw connecting portion 128 b.

In order to facilitate the connection between the screw connection portion 128b and the corresponding screw 129c, a plurality of guide ribs 123e may be circumferentially disposed in the receiving cavity 123c, and a plurality of rotation stopping grooves 128c may be circumferentially disposed on the outer surface of the sub-cover. The respective rotation stopping grooves 128c correspond one-to-one to the respective guide ribs 123 e. The position of the end cap 128 relative to the knob 123 is fixed by inserting the guide ribs 123e into the corresponding rotation stop grooves 128 c. Since the screw connecting portion 128b is provided on the sub-cover, the position of the screw connecting portion 128b with respect to the knob 123 is also fixed. The screw 129c is disposed in the screw hole 123f of the knob 123, so that the screw connecting portion 128b can be aligned and connected with the corresponding screw 129 c. When the knob 123 is turned, the knob 123 may move in the axial direction of the support shaft, and the second clamp 122 may move in the axial direction of the support shaft by the force applied to the stopper 122b by the third positioning portion 128a or the second positioning portion 123 b.

It should be noted that, in the above structure, the knob 123 may be first screwed to the support shaft during assembly. The support shaft is then fitted with the washer 126 and the rotation stop pin 129b is installed. Then, the second holding member 122 is fitted over the support shaft, and the two sub-covers are fitted to the stoppers 122b of the second holding member 122. Next, the rotation stopping grooves 128c are aligned with the guide ribs 123 e. The two sub-covers are pressed into the receiving cavities 123c of the knob 123 together with the second clamping members 122. Finally, the end cap 128 is fixed by connecting the screw 129c to the screw connecting portion 128 b.

As can be seen from the above description, when the clampable portion of the electric power tool is clamped by the first clamping member 121 and the second clamping member 122, that is, the locking mechanism composed of the first clamping member 121 and the second clamping member 122 is in the locked state, since the knob 123 is spaced apart from the handle 111, the knob 123 is not touched when the grip posture of the handle 111 is changed, the handle 111 is detached from the support shaft, or the handle 111 is maintained. And thus does not change the locking state of the locking mechanism. When the locking mechanism is in a release state, namely when the electric tool is not clamped between the two clamping pieces, a distance is still kept between the knob 123 and the handle 111, so that the knob 123 is not touched when the holding posture of the handle 111 is changed, the handle 111 is detached from the supporting shaft, or the handle 111 is maintained. And thus does not change the above-mentioned release state.

The driving mechanism drives the clamping piece close to the driving mechanism to move. It can be understood that the driving mechanism can also drive the clamping piece far away from the driving mechanism to move. That is, the clamp close to the driving mechanism is fixedly coupled to the supporting unit 130. The clamping piece far away from the driving mechanism is driven by the driving mechanism to move.

The knob 123 is a driving mechanism for linearly moving the holder by rotating itself. It can be understood that the driving mechanism can also drive the clamping piece to move through the self linear movement.

For example, the supporting unit 130 may be provided with a toothed belt, and the driving mechanism may be a driving block sleeved on the supporting unit 130. The driving block is provided with a clamping plate which can be connected with a torsional spring arranged on the driving block. The driving block may be linearly moved along the supporting unit 130. One end of the clamping plate is inserted into a tooth groove between two adjacent teeth on the toothed belt to realize the positioning of the driving block. The clamping plate is separated from the tooth groove by pressing the other end of the clamping plate downwards, so that the driving block can move freely.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An auxiliary handle attachment for detachable connection to a power tool, the auxiliary handle attachment comprising a grip unit, a locking mechanism capable of being connected to or disconnected from the power tool, and a drive mechanism for driving movement of at least part of the locking mechanism; the locking mechanism has a locking state capable of being fixed with the electric tool and a releasing state capable of being separated from the electric tool; in the locked state, the holding unit is separated from the driving mechanism and the at least part of the locking mechanism, and the locking state of the locking mechanism is not changed due to the operation of the holding unit.

2. The accessory handle according to claim 1, wherein the accessory handle has a longitudinal axis, the grip unit is located at one end of the accessory handle along the longitudinal axis, and the locking mechanism is located at the other end of the accessory handle opposite the grip unit.

3. An auxiliary handle attachment as claimed in claim 2, wherein the auxiliary handle attachment comprises a support unit for connecting a gripping unit and a locking mechanism, the gripping unit being fixedly arranged relative to the support unit, the drive mechanism being located between the locking mechanism and the gripping unit and being movable relative to the support unit along the longitudinal axis.

4. The accessory handle of claim 3, wherein the support unit is provided with one of a threaded portion and a knob nut, and the drive mechanism is provided with the other of the threaded portion and the knob nut, such that the drive mechanism and the support unit are locked by engagement of the threaded portion with the internal threads of the knob nut.

5. The accessory handle assembly of claim 4, wherein the drive mechanism includes a knob operable to rotate about the longitudinal axis, the knob being coupled to the at least partial locking mechanism, rotation of the knob driving the at least partial locking mechanism to move along the longitudinal axis.

6. The accessory handle according to claim 3, wherein the grip unit is removably fixedly connected to the support unit.

7. The accessory handle of claim 1, further comprising a trigger safety switch for controlling the drive mechanism, the trigger safety switch having a first state that limits movement of the latch mechanism and a second state that releases the limit.

8. The accessory handle of claim 7, wherein the trigger safety switch is separate from the grip unit.

9. The accessory handle of claim 8, wherein the trigger safety switch is disposed on one side of the drive mechanism.

10. The accessory handle of claim 1, wherein the locking mechanism comprises a first clamp and a second clamp, and the drive mechanism is configured to drive one of the first and second clamps to move to change a distance between the first and second clamps.