CN205725264U

CN205725264U - Brush structure

Info

Publication number: CN205725264U
Application number: CN201620152311.4U
Authority: CN
Inventors: 吉绍山; 刘炳华; 陈国军
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2016-02-29
Filing date: 2016-02-29
Publication date: 2016-11-23
Anticipated expiration: 2026-02-28

Abstract

This utility model relates to a kind of brush structure, and for Profile cut-off machine, brush structure includes fixture, whirlpool spring and brush lid, and fixture is installed on the casing of motor, and has the receiving channel for accommodating brush；Spring one end, whirlpool is connected with fixture, the other end in the radial direction of the armature shaft of motor along receiving channel Continued depression brush so that brush compresses on the diverter being arranged at armature shaft；Being provided with opening in casing, brush structure is installed on the casing position near opening, and brush lid is removable installed in the opening part of casing, and cover sets brush structure.So, compress brush by the contact of spring face, whirlpool, the reliable contacts of brush and diverter can be realized, the linear contact lay of middle stage clip, along with the consumption of brush, its radial force variation being applied on brush is little, good reliability, improves the service life of whirlpool spring and brush.

Description

Brush structure

Technical field

This utility model relates to electric tool technical field, particularly relates to a kind of brush structure.

Background technology

Profile cut-off machine is one of cutting tool conventional in electric tool, wherein for the device of electric current commutation It is referred to as reversing arrangement.Known reversing arrangement includes diverter and the carbon brush being positioned at un-rotatably on armature shaft, Diverter has multiple being arranged side by side in a circumferential direction and the thin slice of electric insulation each other, and carbon brush is thin with this Sheet makes electrical contact with, thus produces electric current that is that rotate or that migrate relative to armature winding.

The electrical contact stable for guaranteeing carbon brush and diverter, carbon brush is radially forced at armature shaft by stage clip and changes On device, stage clip and carbon brush linear contact are to ensure the stable electrical contact of itself and diverter, but this kind of stage clip With the mode that presses of carbon brush, poor reliability.Motor, when rotating commutates, can cause carbon brush a certain degree of Abrasion, thus affect the service life of carbon brush, the serious service life even affecting motor, therefore, as The reliability contacted between what lifting carbon brush and diverter and improvement drive the service life of the carbon brush in motor very For key.

Utility model content

Based on this, it is necessary to for existing poor reliability by the way of stage clip presses carbon brush, affect carbon brush The problem in service life, it is provided that the brush structure that a kind of reliability is high and service life is longer.

A kind of brush structure, for Profile cut-off machine, described Profile cut-off machine includes:

Workbench；

Cantilever, is rotatablely arranged on described workbench；

Motor, is installed on described cantilever；And

Saw blade, is exported power by described motor；

Described brush structure includes:

Fixture, is installed on the casing of described motor, and has the receiving channel for accommodating brush；

Whirlpool spring, one end is connected with described fixture, and the other end is in the radial direction of the armature shaft of described motor Along brush described in described receiving channel Continued depression, so that described brush compresses is arranged at changing of described armature shaft On device；

Brush lid, described casing is provided with opening, described brush structure be installed on described casing near described in open The position of mouth, described brush lid is removable installed in the opening part of described casing, and cover sets described brush knot Structure.

Above-mentioned brush structure, compresses brush by the contact of spring face, whirlpool, can realize the reliable of brush and diverter Contact, the compared to existing technology linear contact lay of middle stage clip, along with the consumption of brush, it is applied to the footpath on brush Little to power change, good reliability, improve the service life of whirlpool spring and brush.

Wherein in an embodiment, described fixture includes:

Brush holder, is installed on described casing, and spring one end, described whirlpool is connected with described brush holder；

Brush lining, is fixed in the casing of described motor, and is connected with described brush holder, make described brush holder relative to institute State casing to fix；

Brush carrier, is arranged at described brush holder, forms the described receiving channel for accommodating described brush.

Wherein in an embodiment, described brush lining include connecting portion and with described connecting portion bending be connected spacing Portion, described connecting portion is fixed in described casing, and is connected to described brush holder one end, and described limiting section support is connected to Described brush holder side, so that the most described casing of described brush holder is fixed.

Wherein in an embodiment, described brush carrier includes relative and spaced two side and connects two side Connection wall, to form described receiving channel, described two side through described brush lining described limiting section and consolidate It is connected to described brush holder.

Wherein in an embodiment, described brush holder offers mounting hole site, the described connecting portion of described brush lining Offering the via corresponding with described mounting hole site, described two side end is respectively equipped with clamping part, described card If portion wears described mounting hole site and described via successively, and rivets along brush holder bending, so that described brush carrier is solid Due to described brush holder.

Wherein in an embodiment, towards the described sidewall of spring side, described whirlpool along the extension of described receiving channel Direction offers bit-avoiding slot, and the width of described bit-avoiding slot matches with the width of described whirlpool spring.

Wherein in an embodiment, described brush holder being additionally provided with whirlpool spring abutment, spring abutment one end, described whirlpool is fixed in institute Stating brush holder, the other end extends along the axial direction of described armature shaft, and described whirlpool spring is arranged in described whirlpool spring abutment.

Wherein in an embodiment, described whirlpool spring has the support arm with pressing end, described support arm position In described receiving channel away from one end of described armature shaft, described pressing end from described support arm towards away from institute The direction bending extension stating brush carrier forms a uncovered portion, and described uncovered portion forms face with described brush and contacts, with The pretightning force that described brush moves along described armature shaft radial direction in described receiving channel is provided.

Wherein in an embodiment, described brush structure also includes securing member, and described brush lid is by described fastening Part is removable installed in the opening part of described casing.

Wherein in an embodiment, described brush structure centrosymmetry on the basis of the axis of described armature shaft sets Put.

Accompanying drawing explanation

Fig. 1 is the structural representation of the Profile cut-off machine in this utility model one embodiment；

The A-A that Fig. 2 is the Profile cut-off machine shown in Fig. 1 to profile；

Fig. 3 is the brush lid matching relationship schematic diagram with casing of the Profile cut-off machine shown in Fig. 1；

Fig. 4 is the partial enlarged drawing at the B of the Profile cut-off machine shown in Fig. 3；

Fig. 5 is that another visual angle of the Profile cut-off machine shown in Fig. 1 removes the structural representation that brush covers；

Fig. 6 is the partial enlarged drawing at the C of the Profile cut-off machine shown in Fig. 5；

Fig. 7 be the Profile cut-off machine shown in Fig. 5 D-D to profile；

Fig. 8 is the structural representation at the another visual angle of the Profile cut-off machine shown in Fig. 1；

Fig. 9 be the Profile cut-off machine shown in Fig. 8 E-E to profile；

Figure 10 is the whirlpool spring fiting relation figure with whirlpool spring abutment of the Profile cut-off machine shown in Fig. 9.

Detailed description of the invention

Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with attached Detailed description of the invention of the present utility model is described in detail by figure.Elaborate much have in the following description Body details is so that fully understanding this utility model.But this utility model can be retouched at this to be much different from The alternate manner stated is implemented, and those skilled in the art can be in the case of this utility model intension Doing similar improvement, therefore this utility model is not limited by following public specific embodiment.

It should be noted that when element is referred to as " being fixed on " another element, and it can be directly at another On individual element or element placed in the middle can also be there is.When an element is considered as " connection " another yuan Part, it can be directly to another element or may be simultaneously present centering elements.

Unless otherwise defined, all of technology used herein and scientific terminology with belong to of the present utility model The implication that those skilled in the art are generally understood that is identical.Institute in description of the present utility model herein The term used is intended merely to describe the purpose of specific embodiment, it is not intended that in limiting this utility model. Term as used herein " and/or " include the arbitrary and all of one or more relevant Listed Items Combination.

As shown in Figures 1 and 2, the Profile cut-off machine 100 in this utility model one embodiment, including workbench 10, cantilever 20, motor 30 and saw blade (figure is not marked).This cantilever 20 is rotatablely arranged at this workbench On 10, this motor 30 is installed on this cantilever 20, and this saw blade is connected with this motor 30, by described electronic Machine 30 exports power.Wherein, this motor 30 is ac motor, it should be appreciated that this motor 30 can be additionally used in the electric tools such as such as angle mill, machine for working stone, exchange sweep-saw, reciprocating sow.

This motor 30 includes casing 32, armature shaft 34 and diverter 36.This motor 30 has setting Stator (not shown) in casing 32, is provided with the rotor of at least one winding in this stator, this rotor has Having armature shaft 34, diverter 36 to be arranged at the most rotatably on armature shaft 34, diverter 36 is by leading Line is electrically connected to winding, by conducting, so that rotor has positive negative side of brush 41 and diverter 36 To rotating function.

This brush structure 40 includes fixture 42 and whirlpool spring 44, and this fixture 42 is installed on this motor 30 Casing 32, and there is the receiving channel 422 (see Fig. 6) for accommodating brush 41.This whirlpool spring 44 one end Be connected with this fixture 42, the other end in the radial direction of the armature shaft 34 of this motor 30 along receiving channel This brush 41 of 422 Continued depression, so that this brush 41 compresses on the diverter 36 being arranged at armature shaft 34. So, the reliable contacts of brush 41 and diverter 36, the compared to existing technology linear contact lay of middle stage clip can be realized, Along with the consumption of brush 41, it is little that it is applied to the radial force variation on brush 41, good reliability, improves The service life of whirlpool spring 44 and brush 41.

Being additionally provided with opening in this casing 32, this brush structure 40 is installed on the casing 32 position near this opening Putting place, this brush structure 40 also includes brush lid 46, and this brush lid 46 is removable installed in described casing 32 Opening part, and cover set described brush structure 40.So, brush 41 and the quick change of whirlpool spring 44 can be realized, make By facility.

It is pointed out that emphasis of the present utility model does not lies in how motor 30 has the function of rotating, Therefore, concrete structure and principle thereof are not repeated them here.

Brush structure 40 in this utility model, in Figure 10, will be carried out by FIG. 2 below with specific embodiment Explanation.

As in figure 2 it is shown, the brush structure 40 in this utility model one embodiment, it is used for being provided with this diverter The motor 30 of 36.Diverter 36 is disposed concentrically upon around armature shaft 34 axis, and this diverter 36 has For the electric contact conducted with brush 41, the different electric currents of motor 30 are energized by these electric contacts. Specific in an embodiment, this brush 41 is carbon brush.

This fixture 42 includes brush holder 424, brush lining 426 and brush carrier 428.Brush holder 424 is installed on casing 32, Whirlpool spring 44 one end is connected with this brush holder 424, and brush lining 426 is fixed in casing 32, and is connected with brush holder 424, So that the relative casing of brush holder 424 32 is fixed.Brush carrier 428 is arranged at brush holder 424, before being formed with brush holder 424 The receiving channel 422 stated, this receiving channel 422 is arranged for accommodating brush 41.Receiving channel 422 has Having bearing of trend, this bearing of trend is along the radial direction of armature shaft 34, thus, makes brush 41 at armature shaft 34 in the radial direction, i.e. compresses, on the bearing of trend of receiving channel 422, the diverter being arranged at armature shaft 34 On 36.Wherein, this whirlpool spring 44 contacts for face with this brush 41,

In the present embodiment, as shown in Figures 3 and 4, this casing 32 has two intervals and relative, along armature The chute 322 that axle 34 radially extends, brush holder 424 is placed in two chutes 322, so that brush holder 424 is at armature The axial direction of axle 34 is limited, and brush lining 426 is fixed in the casing 32 of motor 30, and at armature shaft 34 Radial direction spacing to brush holder 424, so, make the relative casing of brush holder 424 32 fix.Specifically, should Brush lining 426 includes connecting portion 4262 and bends the limiting section 4264 being connected, connecting portion with this connecting portion 4262 4262 are fixed in described casing 32, and are connected to this brush holder 424 one end, and described limiting section 4264 is connected to Brush holder 424 side, thus axially and radially spacing to brush holder 424 at armature shaft 34, and then make brush holder 424 The most described casing 32 is fixed.

Preferably, refering to Fig. 5 and Fig. 6, this brush carrier 428 has that relative two are relative and spaced both sides Wall 4282 and the connection wall 4284 of connection two side 4282, to form aforesaid receiving channel 422, described Two side 4282 serves as a contrast the described limiting section 4264 of 426 through brush and is fixed in brush holder 424.In the present embodiment, This sidewall 4282 and connect wall 4284 layout at substantially right angles relative to one another, by pressing and bending technique, by one The space of the individual bending of stamping parts integratedly formation one substantially cuboid, brush holder 424 is provided with mounting hole site (figure Do not mark), the connecting portion 4262 of brush lining 426 offers the via corresponding with mounting hole site, two side 4282 End has the clamping part 4286 (see Fig. 7) matched with via and described mounting hole site, two side 4282 Clamping part 4286 interference fit wear this mounting hole site and via, and make clamping part 4286 along brush holder 424 Bending rivets, thus brush carrier 428 is fixed on brush holder 424.Certainly, in some other embodiment, this side Wall 4282 and connection wall 4284 are alternatively the most multiple stamping parts and are interconnected to form, and this brush carrier 428 also can be adopted It is fixed on brush holder 424, such as welding etc. in other ways.

Preferably, refering to Fig. 8 and Fig. 9, this brush holder 424 is additionally provided with whirlpool spring abutment 4242, this whirlpool spring abutment 4242 One end is affixed with brush holder 424, and the other end extends along the axial direction of described armature shaft 34, and this whirlpool spring 44 blocks It is located at this whirlpool spring abutment 4242, so that the other end of whirlpool spring 44 is along this electricity of radial direction Continued depression of armature shaft 34 Brush 41.Specifically, this whirlpool spring abutment 4242 is bearing pin, whirlpool spring abutment 4242 offers draw-in groove 4244 (see figure 10) in, the other end of this whirlpool spring 44 is arranged in draw-in groove 4244.

Wherein, brush 41 is two, then this corresponding brush structure 40 is also two, for making diverter 36 And the uniform force of brush 41, brush structure 40 is centrosymmetry on the basis of the axis of armature shaft 34.Specifically Ground, these two brush carrier 428 centrosymmetry are arranged, as it is shown in figure 9, two whirlpool spring 44 also centrosymmetry are arranged, I.e. two installing plate also centrosymmetry settings on the basis of the axis of armature shaft 34, accordingly, this whirlpool spring 44 Contact area also centrosymmetry on the basis of the axis of armature shaft 34 with brush 41.So, improve whirlpool Spring 44 and the service life of brush 41.

Preferably, refering to Figure 10, this whirlpool spring 44 has the support arm 444 with pressing end 442, this Brace 444 is located substantially at this receiving channel 422 one end away from armature shaft 34, pressing end 442 self-supporting Arm 444 forms a uncovered portion towards the direction bending extension away from brush carrier 428, this uncovered portion and this brush 41 shape One-tenth face contacts, to provide described brush 41 in described receiving channel 422 along described armature shaft 34 radial direction The pretightning force of motion.It should be appreciated that the mild mistake of flexibility of this pressing end 442 self-supporting arm 444 Cross, to ensure that it contacts with the face of brush 41.Wherein, this support arm 444 is also curved towards receiving channel 422 Folding certain angle, in order to the Continued depression of whirlpool spring 44.

Preferably, open towards the sidewall 4282 of spring 44 side, described whirlpool along the bearing of trend of receiving channel 422 Being provided with bit-avoiding slot 4288 (see Fig. 4), the width of this bit-avoiding slot 4288 matches with the width of this whirlpool spring 44, with Make this whirlpool spring 44 when brush 41 moves along receiving channel 422, sustainable compress, and not by brush carrier 428 Sidewall 4282 interfere.

Preferably, this brush structure 40 also includes locking member 43, and this locking member 43 is along the radial direction of armature shaft 34 Direction wears the connecting portion 4262 of this brush lining 426, and is threadedly connected to casing 32, with by this brush structure 40 It is fixedly connected on this casing 32.In the present embodiment, this locking member 43 is lock screw, this locking member 43 Head towards brush lid 46.

Preferably, this brush structure 40 also includes that securing member 45, described brush lid 46 pass through described securing member 45 It is removable installed in described casing 32.Specifically, this securing member 45 is the fixing screw of brush lid, this securing member 45 ends being arranged at motor 30.In the present embodiment, brush lid 46 is one, certainly, implements at other In example, this brush lid 46 may also comprise two, and two described brush lids 46 are the most detachable by this securing member 45 Be connected to the both sides of casing 32.

Above-mentioned brush structure 40, compresses brush 41 by 44 contacts of whirlpool spring, can realize brush 41 and change To the reliable contacts of device 36, and along with the abrasion of brush 41, it is applied to the radial force variation on brush 41 Not quite, good reliability, improve the service life of whirlpool spring 44 and brush 41.Meanwhile, by brush lid 46 with Casing 32 ground removably connects, and can realize the quick change of brush 41 and whirlpool spring 44, easy-to-use.

Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the most right The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.

Embodiment described above only have expressed several embodiments of the present utility model, its describe more concrete and In detail, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, it is right For those of ordinary skill in the art, without departing from the concept of the premise utility, it is also possible to do Going out some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, this utility model is special The protection domain of profit should be as the criterion with claims.

Claims

1. a brush structure, for Profile cut-off machine, described Profile cut-off machine includes:

Workbench；

Cantilever, is rotatablely arranged on described workbench；

Motor, is installed on described cantilever；And

Saw blade, is exported power by described motor；

It is characterized in that, described brush structure includes:

Whirlpool spring, one end is connected with described fixture, the other end in the radial direction of the armature shaft of described motor along brush described in described receiving channel Continued depression so that described brush compresses on the diverter being arranged at described armature shaft；

Brush lid, described casing is provided with opening, and described brush structure is installed on the described casing position near described opening, and described brush lid is removable installed in the opening part of described casing, and cover sets described brush structure.

Brush structure the most according to claim 1, it is characterised in that described fixture includes:

Brush lining, is fixed in the casing of described motor, and is connected with described brush holder, make the most described casing of described brush holder fix；

Brush structure the most according to claim 2, it is characterized in that, described brush lining includes connecting portion and bends, with described connecting portion, the limiting section being connected, described connecting portion is fixed in described casing, and it is connected to described brush holder one end, described limiting section support is connected to described brush holder side, so that the most described casing of described brush holder is fixed.

Brush structure the most according to claim 3, it is characterized in that, described brush carrier includes relative and spaced two side and connects the connection wall of two side, and to form described receiving channel, described two side is through the described described limiting section brushing lining and is fixed in described brush holder.

Brush structure the most according to claim 4, it is characterized in that, mounting hole site is offered on described brush holder, the described connecting portion of described brush lining offers the via corresponding with described mounting hole site, described two side end is respectively equipped with clamping part, described clamping part wears described mounting hole site and described via successively, and rivets along described brush holder bending, so that described brush carrier is fixed on described brush holder.

Brush structure the most according to claim 4, it is characterised in that offering bit-avoiding slot towards the described sidewall of spring side, described whirlpool along the bearing of trend of described receiving channel, the width of described bit-avoiding slot matches with the width of described whirlpool spring.

Brush structure the most according to claim 2, it is characterised in that be additionally provided with whirlpool spring abutment on described brush holder, spring abutment one end, described whirlpool is fixed in described brush holder, and the other end extends along the axial direction of described armature shaft, and described whirlpool spring is arranged in described whirlpool spring abutment.

Brush structure the most according to claim 2, it is characterized in that, described whirlpool spring has the support arm with pressing end, described support arm is positioned at described receiving channel one end away from described armature shaft, described pressing end forms a uncovered portion from described support arm towards the direction bending extension away from described brush carrier, described uncovered portion forms face with described brush and contacts, with the pretightning force providing described brush to move along described armature shaft radial direction in described receiving channel.

Brush structure the most according to claim 1, it is characterised in that described brush structure also includes that securing member, described brush lid are removable installed in the opening part of described casing by described securing member.

Brush structure the most according to claim 1, it is characterised in that described brush structure centrosymmetry on the basis of the axis of described armature shaft is arranged.