WO2020140596A1

WO2020140596A1 - Adjustable tool head mechanism, portable electric tool, and tool head adjustment method

Info

Publication number: WO2020140596A1
Application number: PCT/CN2019/114121
Authority: WO
Inventors: 倪祖根
Original assignee: 苏州金莱克精密机械有限公司
Priority date: 2019-01-02
Filing date: 2019-10-29
Publication date: 2020-07-09
Also published as: CN109511399B; CN109511399A

Abstract

An adjustable tool head mechanism comprises a tool head (1), a cover plate (2), and a handle assembly (3). An end of the cover plate is rotatably connected to outer sidewalls of two sides of the tool head. A fastener (4) is disposed on the cover plate. The handle assembly extends into the cover plate from another end of the cover plate, and is rotatably connected thereto. An end of the fastener is engaged with the handle assembly, and another end of the fastener is engaged with the tool head. When the handle assembly is moved, the fastener is driven to move in an axial direction of the handle assembly, such that the fastener is engaged with or separated from the tool head. Further comprised are a portable electric tool provided with the adjustable tool head mechanism, and a tool head adjustment method. Rotating the handle assembly of the portable electric tool drives the fastener to separate from the tool head, thereby realizing adjustment of the tool head by means of rotation and enabling convenient operation.

Description

Machine head adjustable mechanism, hand-held electric tool and machine head adjustment method

Technical field

The invention relates to the technical field of garden tools, in particular to an adjustable machine head mechanism, a hand-held electric tool and a machine head adjustment method.

Background technique

In the landscaping work, it is often necessary to use electric tools to trim the plants. The existing power tools for landscaping mainly include: a machine head, a handle, etc., and a work head for trimming plants is provided on the machine head. In order to facilitate the use of power tools, the angle of the machine head needs to be adjusted. In order to achieve the above purpose, the existing power tools require people to bend over to operate the machine head buttons or push buttons to achieve the nod structure of the whole machine. Inconvenience to the adjustment of the machine head. To solve this problem, a long-distance linkage mechanism can be built between the machine head and the handle. The operation on the machine head can be moved to the handle through the connecting rod. Although it can be operated without bending down, more parts need to be added. Other functions of the whole machine have a certain impact, and the reliability is greatly reduced. Therefore, for the above problems, it is necessary to propose further solutions.

Summary of the invention

The invention aims to provide an adjustable machine head mechanism, a hand-held power tool and an adjustment method of the machine head, so as to overcome the shortcomings in the prior art.

To solve the above technical problems, the technical solutions of the present invention are:

An adjustable head mechanism, which includes: a head, a cover, and a handle assembly,

One end of the cover plate is pivotally connected to the outer side walls of both sides of the machine head, the cover plate is provided with a buckle, and the handle assembly extends into the cover plate from the other end of the cover plate , And is pivotally connected to the cover plate, one end of the buckle is buckled with the handle assembly, the other end of the buckle is buckled with the machine head, and the buckle is driven when the handle assembly moves Move along the axial direction of the handle assembly, so that the buckle engages or separates from the handpiece.

Preferably, a circular protrusion is provided on any outer side wall of the handpiece, the cover plate is pivotally engaged with the protrusion, the cover plate includes a left cover plate and a right cover plate, The left cover plate is pivotally engaged with the protrusion on the left side of the machine head, and the right cover plate is pivotally engaged with the protrusion on the right side of the machine head.

Preferably, the machine head is provided with a plurality of clamping slots along the pivot direction of the machine head, and the buckle selectively cooperates with the clamping slots, or, the machine head is along the pivot direction of the machine head A plurality of engagement teeth are provided, and the end surface of the buckle is an engagement surface that can cooperate with the engagement teeth.

Preferably, the cover plate has a receiving cavity, and the buckle is received in the receiving cavity.

Preferably, the buckle includes an engaging member, and the engaging member includes an engaging member body, a connecting portion provided at one end of the engaging member body, and an engaging portion vertically connected to the connecting portion at one end , The other end of the engaging portion is provided with a protruding block provided toward the machine head, the engaging body is slidingly received in the accommodating cavity, and the engaging portion and the accommodating cavity There is also a return spring.

Preferably, the buckle further includes a pressing member, which is formed by extending from the other end of the body of the engaging member, and the pressing member extends from the window accommodating the cavity, and the handle assembly extends A part of the cover plate is covered with a connecting ring, a flange is provided on the connecting ring, and a bending structure capable of hooking the flange is provided on the body of the engaging member.

Preferably, the handle assembly operates in a rotating manner. The handle assembly includes a handle and a rotating body, one end of the handle is fixedly connected to the rotating body, and the rotating body extends from the other end of the cover plate Into the cover plate and pivotally connected with the cover plate.

Preferably, a limiting post is provided on the rotating body, an inclined surface for sliding the limiting post is provided in the inner side wall of the cover plate, and the limiting post slides from one end of the inclined surface along the axial direction To the other end.

Preferably, the inclined surface is formed by an inner wall surface of a sliding groove provided inside the cover plate, and the sliding groove is a special-shaped groove.

Preferably, the handle assembly operates in a stretching manner. The handle assembly includes: a handle, one end of the handle is linked with the buckle, and the handle pulls the buckle along the axial direction with the handpiece Engage or separate.

A hand-held power tool includes: a working head and a machine head adjustable mechanism as described above, the working head is mounted on the machine head.

A handpiece adjustment method, the handpiece is a hand-held power tool head, the handle of the hand-held power tool is separated from the handpiece by a snap, the handpiece adjustment method includes the following steps:

Drive the handle of the hand-held power tool, when the handle is driven in a rotating manner, the handle drives the buckle away from the handpiece along the axial direction of the handle, the handpiece is in an unlocked state, and the handpiece is controlled relative to the handle Rotate to the required position, and rotate the handle in the opposite direction. The handle drives the buckle to approach the machine head along the axis of the handle, so that the buckle and the head are engaged, and the adjustment angle of the head is fixed;

Alternatively, the handle of the hand-held power tool is driven, and when the handle is driven in a stretched manner, the handle drives the buckle away from the handpiece along the axial direction of the handle, the handpiece is in an unlocked state, and the handpiece is controlled relative The handle rotates to a desired position, and the handle is pushed in the reverse direction. The handle drives the buckle to approach the machine head in the axial direction of the handle, so that the buckle and the head are engaged, and the adjustment angle of the head is fixed.

Compared with the prior art, the beneficial effects of the present invention are: the hand-held power tool of the present invention, by rotating the handle assembly, drives the buckle away from the machine head, which facilitates the machine head to nod through rotation, and the operation is more convenient.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only These are some of the embodiments described in the present invention. For those of ordinary skill in the art, without paying any creative work, other drawings can also be obtained based on these drawings.

FIG. 1 is a three-dimensional exploded schematic view of a specific embodiment of a handheld power tool of the present invention;

Figure 2 is a schematic diagram of the structural relationship between the buckle and the head in the stepless adjustment scheme;

Figure 3 is an enlarged schematic view of the buckle;

4 is a schematic diagram of the internal structure of the handheld power tool of the present invention;

5 is a schematic view of the state of the adjustable head mechanism before the mechanism rotates;

Figure 6 is a schematic view of the state of the head adjustable mechanism after the mechanism rotates;

7 is a partially enlarged schematic view of the handle assembly in FIG. 1;

Fig. 8 is an enlarged schematic plan view of a cover plate in an adjustable head mechanism.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

As shown in FIG. 1, the present invention provides an adjustable head mechanism, which includes: a head 1, a cover plate 2, and a handle assembly 3.

One end of the cover plate 2 is pivotally connected to the outer side walls of both sides of the head 1, so that when the head 1 is pivoted relative to the cover plate, the angle of the head 1 can be adjusted, so that the adjustable mechanism of the head has an appropriate Angle of grass work. In order to achieve this purpose, any outer side wall of the handpiece 1 is provided with a circular protrusion 11, correspondingly, the cover plate 2 has a cavity capable of accommodating the protrusion 11, and the cover plate 2 pivots through its cavity at this time Buckle on the protrusion 11. In addition, a heat dissipation through hole is opened on the wall surface of the cavity.

For the convenience of assembly, the cover plate 2 includes a left cover plate 21 and a right cover plate 22, and the left cover plate 21 and the right cover plate 22 are disassembled and assembled together. Wherein, the left cover 21 is pivotally engaged with the protrusion on the left side of the handpiece 1 through its cavity, and the right cover 22 is pivotally engaged with the protrusion on the right side of the handpiece 1 through its cavity.

The cover plate 2 is also provided with a buckle 4. Correspondingly, the head 1 is provided with a structure that cooperates with the buckle 4. The buckle 4 can be locked or separated from the above structure to achieve the angle of the head 1 Step or stepless adjustment.

When performing stepwise adjustment, the above structure is a card slot 12 provided on the machine head 1. Therefore, when the buckle 4 is engaged with the slot 12, the handpiece 1 is held in a fixed position relative to the cover 2. When the buckle 4 and the slot 12 are separated, the machine head 1 can rotate relative to the cover plate 2 and the angle of the machine head 1 can be adjusted.

When the buckle 4 cooperates with the chute 12, in order to make the handpiece 1 have a plurality of fixed-angle gears, the handpiece 1 is provided with a plurality of chucks 12 along the pivot direction of the handpiece 1, the buckle 4 is selectively Cooperate with the card slot 12. Therefore, through the rotation of the machine head 1, the buckle 4 can selectively cooperate with different buckling slots 12.

As shown in FIG. 2, when the stepless adjustment is performed, the above structure is a plurality of meshing teeth provided on the machine head 1, and accordingly, the end surface of the buckle 4 is an meshing surface that can cooperate with the above-mentioned several core teeth. Therefore, since several meshing teeth can be continuously arranged along the pivoting direction of the machine head 1 at a small interval, the small angle adjustment can be achieved when the machine head 1 is pivoted, and thus the stepless adjustment of the machine head 1 is realized.

As shown in FIGS. 3 and 4, in one embodiment, the cover plate 2 is provided with a receiving cavity 23, and the buckle 4 is received in the receiving cavity 23.

Specifically, the buckle 4 includes: an engaging body 41, a connecting portion 42 provided at one end of the engaging body 41, and an engaging portion 43 whose one end is vertically connected to the connecting portion 42, and the other end of the engaging portion 43 is provided with The bump 44 is set toward the machine head. Among them, the protrusion 44 is used to achieve engagement or separation with the handpiece 1. The engaging body 41, the connecting portion 42, the engaging portion 43, and the protrusion 44 may be integrally formed, or may be provided separately, and assembled together by bonding or the like.

The engaging body 41 is slidably accommodated in the accommodating cavity 23, and a return spring 5 is provided between the engaging portion 43 and the accommodating cavity 23 to facilitate the reset of the buckle 4. At this time, a convex post 45 is provided on the engaging portion 43, one end of the spring 5 is sleeved on the convex post 45, and the other end abuts against the wall surface of the cavity 23.

The buckle 4 further includes a pressing member 46, which provides the function of manually driving the engaging portion 43 to move, which is formed by the other end of the engaging member body 41, and the pressing member 46 extends from the window accommodating the cavity 23 . Therefore, the pressing member 46 may be manually operated to drive the engaging portion 43 to be engaged or separated.

As shown in FIGS. 5 and 6, the above handle assembly 3 is used for an operator to hold the adjustable mechanism of the handpiece. At the same time, the present invention can also realize the disengagement of the buckle 4 from the handpiece 1 by rotating the handle assembly 3, which is convenient for the handpiece 1 Nod through rotation.

Specifically, the handle assembly 3 extends from the other end of the cover plate 2 into the cover plate 2 and is pivotally connected to the cover plate 2, and at the same time, the buckle 4 is engaged with the handle assembly 3, and when the handle assembly 3 rotates, the card can be driven The buckle 4 is engaged with or separated from the machine head 1 along the axial direction of the handle assembly 3.

In order to achieve the snap connection between the buckle 4 and the handle assembly 3, the portion of the handle assembly 3 extending into the cover plate 2 is covered with a connecting ring 6, the connecting ring 6 is provided with a flange 61, and the engaging member 42 abuts against the flange 61 . Thus, when the handle assembly 3 moves along its own axial direction, the buckle 4 can be pushed away from the locking groove 12 through the flange 61 of the connecting ring 6. At this time, the engaging body 41 is provided with a bending structure 47 capable of hooking the flange 61.

Therefore, based on the linkage relationship between the buckle 4 and the handle assembly 3, when the handle assembly 3 is actuated, the coupling ring 6 thereon can be used to realize the clutch between the buckle 4 and the slot 12.

As shown in FIG. 7, in one embodiment, the handle assembly 3 moves in a rotating manner to realize the clutch between the buckle 4 and the slot 12. The rotation mode refers to that the handle assembly 3 rotates around its own axis as a rotation axis. In other embodiments, based on the technical concept of the present invention, other actions are used to achieve the same technical effect, which are covered by the scope of protection of the present invention.

Specifically, the handle assembly 3 includes a handle 31 and a rotating body 32. One end of the handle 31 is fixedly connected to the rotating body 32. The rotating body 32 extends into the cover plate 2 from the other end of the cover plate 2 and pivots with the cover plate 2 connection. In order to simultaneously perform axial movement when the handle assembly 3 rotates, the rotating body 32 is provided with a limit post 321, and the inner side wall of the cover plate 2 is provided with an inclined surface for the limit post 321 to slide. Therefore, when the handle assembly 3 rotates under the external force, the limit post 321 can slide along the above-mentioned inclined surface, and slide from one end of the inclined surface to the other end in the axial direction, so as to drive the buckle 4 linked with it to move in synchronization along the axial direction .

As shown in FIG. 8, in one embodiment, the inclined surface is formed by the inner wall surface of the sliding groove 24 provided inside the cover plate 2, and the sliding groove 24 may be a special-shaped groove. Specifically, the chute 24 is surrounded by ribs provided inside the cover plate 2. Preferably, the chute 24 is in the shape of an “eight” or an L shape. When the chute is "eight" shape, the "eight" shape chute 24 has two ends and a middle for three limit points, the limit post 321 can move between the above three limit points, so set, The bidirectional rotation of the handle assembly 3 can realize the unlocking between the buckle 4 and the head 1.

In order to improve the stability of the unlocking of the handle assembly 3 by driving, the rotating body 32 includes a left rotating part and a right rotating part, wherein both the left rotating part and the right rotating part are provided with a limit post 321, and two sliding grooves are correspondingly provided inside the cover plate 2 twenty four.

Alternatively, the handle assembly 3 can also be driven by stretching, so that the buckle 4 is engaged with or separated from the handpiece 4. Specifically, the handle assembly 3 includes a handle. One end of the handle is connected with the buckle, so as to form a linkage relationship with the buckle. Therefore, when the handle is pulled, the handle drives the buckle away from the machine head in the axial direction, and the head 1 can freely rotate at this time. When the handle is pushed in the reverse direction, the buckle can be driven to engage with the machine head again.

As shown in FIG. 1 again, based on the handpiece adjustable mechanism 100 as described above, the present invention also provides a hand-held power tool 200 using the handpiece adjustable mechanism. The hand-held power tool 200 includes: a work head 201 And the head adjustable mechanism 100 as described above. Wherein, the working head 201 is installed on the machine head 1. By adjusting the machine head 1, the working angle of the upper working head 201 can be adjusted at the same time, so that the working head 201 can obtain a suitable working angle, which is convenient for the use of the handheld power tool. The working head 201 may be a grass cutting head, a pruning saw, a pruning shear, or the like.

Based on the same inventive concept, the present invention also provides a head adjustment method. The head in the adjustment method is a hand-held power tool head. At this time, the handle of the hand-held power tool is separated from the machine head by a buckle. The above-mentioned head adjustment method includes the following steps:

Drive the handle of the hand-held power tool. When the handle is driven in a rotating manner, the handle drives the buckle away from the machine head in the axial direction of the handle. The head is in the unlocked state. The handle drives the buckle to approach the machine head along the axial direction of the handle, so that the buckle and the head are engaged, and the adjustment angle of the head is fixed.

In another technical solution, when driving the handle of a hand-held power tool, when the handle is driven in a stretched manner, the handle drives the buckle away from the handpiece along the axial direction of the handle, the handpiece is unlocked, and the handpiece is controlled to rotate relative to the handle to At the required position, push the handle in the reverse direction, the handle drives the buckle to approach the machine head along the axial direction of the handle, so that the buckle and the head are engaged, and the adjustment angle of the head is fixed.

In summary, the hand-held power tool of the present invention, by rotating the handle assembly, drives the buckle to detach from the machine head, which is convenient for the machine head to realize the nod by rotation, and the operation is more convenient

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present invention is defined by the appended claims rather than the above description, and is therefore intended to fall within the claims All changes within the meaning and scope of the equivalent requirements are included in the present invention. Any reference signs in the claims should not be considered as limiting the claims involved.

In addition, it should be understood that although this specification is described according to embodiments, not every embodiment includes only an independent technical solution. This description of the specification is only for clarity, and those skilled in the art should treat the specification as a whole The technical solutions in the embodiments can also be combined appropriately to form other implementations that can be understood by those skilled in the art.

Claims

An adjustable head mechanism, including: a head, a cover plate, and a handle assembly, characterized in that

One end of the cover plate is pivotally connected to the outer side walls of both sides of the machine head, the cover plate is provided with a buckle, and the handle assembly extends into the cover plate from the other end of the cover plate , And is pivotally connected to the cover plate, one end of the buckle is buckled with the handle assembly, the other end of the buckle is buckled with the machine head, and when the handle assembly is in action, the buckle is driven Move along the axial direction of the handle assembly, so that the buckle engages or separates from the handpiece.
The adjustable head mechanism according to claim 1, wherein a circular protrusion is provided on any outer side wall of the handpiece, and the cover plate is pivotally engaged with the protrusion , The cover plate includes a left cover plate and a right cover plate, the left cover plate is pivotally engaged on the protrusion on the left side of the nose, and the right cover plate is pivotally engaged on the right side of the nose Raised.
The machine head adjustable mechanism according to claim 1, wherein a plurality of clamping slots are provided on the machine head along the pivoting direction of the machine head, and the buckle selectively cooperates with the clamping slots, Alternatively, the machine head is provided with a plurality of engagement teeth along the pivot direction of the machine head, and the end surface of the buckle is an engagement surface that can cooperate with the engagement teeth.
The adjustable head mechanism according to claim 1, wherein the cover plate has a receiving cavity, and the buckle is received in the receiving cavity.
The machine head adjustable mechanism according to claim 4, wherein the buckle includes an engaging member, the engaging member includes: an engaging member body, a connecting portion provided at one end of the engaging member body , And an engaging portion with one end vertically connected to the connecting portion, the other end of the engaging portion is provided with a protrusion provided toward the machine head, and the engaging body is slidingly received in the accommodating cavity , And a return spring is also provided between the engaging portion and the accommodating cavity.
The adjustable head mechanism of claim 5, wherein the buckle further includes a pressing member, the pressing member is formed by extending from the other end of the body of the engaging member, and the pressing member is formed from the A window accommodating the cavity extends, a part of the handle assembly extending into the cover is covered with a connecting ring, the connecting ring is provided with a flange, and the body of the engaging member is provided with a hook Folded bending structure.
The adjustable head mechanism according to claim 1, wherein the handle assembly operates in a rotating manner, the handle assembly includes: a handle and a rotating body, and one end of the handle is fixedly connected to the rotating body , The rotating body extends into the cover plate from the other end of the cover plate, and is pivotally connected with the cover plate.
The adjustable head mechanism according to claim 7, characterized in that a limit post is provided on the rotating body, and an inclined surface for sliding the limit post is provided in the inner side wall of the cover plate, the limit The position post slides from one end to the other end of the inclined surface along the axial direction.
The adjustable head mechanism according to claim 8, wherein the inclined surface is formed by an inner wall surface of a slide groove provided inside the cover plate, and the slide groove is a special-shaped groove.
The adjustable head mechanism according to claim 1, wherein the handle assembly operates in a stretching manner, and the handle assembly includes: a handle, one end of the handle is linked with the buckle, the The handle pulls the buckle to engage or separate from the machine head in the axial direction.
A hand-held power tool, characterized in that the hand-held power tool includes: a working head and an adjustable head mechanism according to any one of claims 1 to 10, the working head is mounted on the head on.
A handpiece adjustment method, the handpiece is a hand-held power tool head, characterized in that the handle of the hand-held power tool is separated from the handpiece by a buckle, and the handpiece adjustment method It includes the following steps:

Drive the handle of the hand-held power tool, when the handle is driven in a rotating manner, the handle drives the buckle away from the handpiece along the axial direction of the handle, the handpiece is in an unlocked state, and the handpiece is controlled relative to the handle Rotate to the required position, and rotate the handle in the opposite direction. The handle drives the buckle to approach the machine head along the axis of the handle, so that the buckle and the head are engaged, and the adjustment angle of the head is fixed;

Alternatively, the handle of the hand-held power tool is driven, and when the handle is driven in a stretched manner, the handle drives the buckle away from the handpiece along the axial direction of the handle, the handpiece is in an unlocked state, and the handpiece is controlled relative The handle rotates to a desired position, and the handle is pushed in the reverse direction. The handle drives the buckle to approach the machine head in the axial direction of the handle, so that the buckle and the head are engaged, and the adjustment angle of the head is fixed.