CN110265248A - The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch - Google Patents
The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch Download PDFInfo
- Publication number
- CN110265248A CN110265248A CN201910650259.3A CN201910650259A CN110265248A CN 110265248 A CN110265248 A CN 110265248A CN 201910650259 A CN201910650259 A CN 201910650259A CN 110265248 A CN110265248 A CN 110265248A
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- Prior art keywords
- brake
- moving contact
- contact
- brake gear
- commutation
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- 238000003825 pressing Methods 0.000 claims description 18
- 230000006378 damage Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 230000003068 static effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000452 mid-foot Anatomy 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/10—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
- H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
- H01H13/64—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
- H01H13/66—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches the operating member having only two positions
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- Stopping Of Electric Motors (AREA)
Abstract
The present invention provides the commutation brake gear and direct current electric power tools switch of a kind of direct current electric power tools switch, belong to electric switch technical field, wherein the commutation brake gear of direct current electric power tools switch includes: reversing arrangement, it is connected between motor and DC power supply, electric current is changed by switching and enters the direction in motor；Brake gear, in closed state, two electric connecting terminals are directly electrically connected with the both ends of motor respectively, to form closed circuit with the motor；Commutation brake gear of the invention, when reversing arrangement carries out commutation switching, brake gear is in closed state, the closed circuit that brake gear and motor are formed, the biggish instantaneous armature supply that motor rotation generates can be consumed in time, to avoid reversing arrangement from arcing occur when carrying out commutation switching, the spark damage generated after arcing is avoided to switch, to improve the service life of switch.
Description
Technical field
The present invention relates to electric switch technical fields, and in particular to a kind of commutation brake gear of direct current electric power tools switch,
And direct current electric power tools switch.
Background technique
Direct current electric power tools switch generally has reversing arrangement, can be changed by the switching of reversing arrangement such as the switch of electric drill
The steering of inversion of direct current electric tool switch.
The switch of the direct current electric power tools as disclosed in Chinese patent literature CN208368375, including button and shell, in shell
It is interior that there is push rod, moving contact and static contact.Button is connect by push rod with moving contact, then by push button, controls dynamic touching
Head with the contact or disconnection between static contact.Handle component is dialled in commutation on shell with positive and negative rotating function, passes through rotate driving
Positioned at the intracorporal commutation elastic slice with upper and lower two stations of shell, to be contacted with static contact corresponding on shell, to realize just
Reversion commutation.
The direct current electric power tools of the prior art switch, switching circuit, as shown in Fig. 2, often by switch button control one
Contact is closed, normally closed interlock can form a closed circuit by reversing arrangement and motor.When pressing lower button downwards, normally closed interlock is disconnected
Open, after the electric current of power supply leads to motor, can driving motor rotated；Work as release button, normally closed interlock is driven by spring and is closed,
Before reversing arrangement switches over, the circuit short circuit that motor is made of normally closed interlock at this time can be consumed due to motor certainly
It changes the line of production raw instantaneous armature supply.When needing motor to carry out commutation rotation, it is mobile that the handle elastic slice that makes to commutate is dialled by driving commutation,
The electric current for allowing hand over power supply enters the direction of motor, to commutate.
In the actual use of direct current electric power tools switch, after trip switch button, due to inertia, motor can also be held
The continuous rotation a bit of time.Within this time, since the rotation of motor will generate instantaneous armature supply, and above-mentioned open is used
Powered-down road before motor stalls, just will carry out switching operation if operator's operation is relatively worried, at this point, due to
Biggish instantaneous armature supply in motor separates and Contact in commutation elastic slice with static contact, equal it is possible that arcing
Phenomenon, and then generate spark.This can generate injury to switch, influence the service life of switch.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that direct current electric power tools in the prior art is overcome to switch, into
When row commutation, motor can pass through reversing arrangement due to the instantaneous armature supply that inertia rotation generates, it is thus possible to commutation can be made to fill
The commutation elastic slice set generates the defect of arcing spark, the armature supply of motor generation can be made to be discharged to provide one kind
When, without going past the commutation brake gear of reversing arrangement.
In order to solve the above technical problem, the present invention provides a kind of commutation brake gears, comprising:
Reversing arrangement is connected between motor and DC power supply, is changed electric current by switching and is entered the direction in motor；
Brake gear is connected directly between the both ends of motor, in closed state, forms closed circuit with the motor.
Preferably, the brake gear includes:
Switch button is fixedly connected with the top of motion bar；
Motion bar is slidably connected in switch case；
Brake moving contact, is arranged in switch case, links with the motion bar；
Touch spring is connected between switch case and brake moving contact, has the touching kept on the brake moving contact
The biasing force that point is deviated towards connection status direction；
First connects point, is electrically connected with one end of motor, when the brake gear is located at closed state, with the brake
A contact on moving contact contacts electrical connection；
Second connects point, is electrically connected with the other end of motor, when the brake gear is located at closed state, with the brake
Another contact on vehicle moving contact contacts electrical connection.
Preferably, the brake gear is in off-state, a contact and the motor of the moving contact that brakes
One end electrical connection.
Preferably, the brake moving contact includes:
Support end, positioned at the middle part of brake moving contact, support is connected in the switch case, and is connected with described second
Point electrical connection；
Tail end is stuck up, positioned at the one end of the brake moving contact, is tilted towards side；
First contact is located relative to described brake moving contact the other end for sticking up tail end, is located in the brake gear
When closed state, it is electrically connected with the first connection point contact.
Preferably, the bottom of the motion bar has convex block, when pressing down on the motion bar, the convex block energy
Tail end is stuck up described in enough resisting, tilts first contact, so that leaving described first connects point.
Preferably, the brake moving contact is slidably arranged in the switch case.
Preferably, the brake moving contact includes:
First contact, positioned at the top of brake moving contact, when the brake gear is located at closed state, with described first
Connect point contact electrical connection；
Second contact, positioned at the bottom of brake moving contact, when the brake gear is located at closed state, with described second
Connect point contact electrical connection.
Preferably, the brake moving contact further include:
Connection ring, is connected to the upper end of brake moving contact, and the bottom of the motion bar has for being plugged in the connection
Link block in ring, when pressing down on the motion bar, the link block can resist the brake moving contact, keep the brake dynamic
Contact slide downward, so that first contact and second contact be made to connect a little and described second respectively away from described first
Connect point.
Preferably, the brake moving contact further include:
Connection sheet, is connected to the upper end of brake moving contact, and the bottom of the motion bar has for abutting the connection sheet
Bearing surface, when pressing down on the motion bar, the bearing surface can resist the brake moving contact, make the dynamic touching of the brake
Head slide downward a little connects with described second so that first contact be made to connect with second contact respectively away from described first
Logical point.
The present invention also provides a kind of direct current electric power tools switches, brake and fill with commutation described in any one of above scheme
It sets.
Technical solution of the present invention has the advantages that
1. commutation brake gear provided by the invention, when reversing arrangement carries out commutation switching, brake gear is in closure
The closed circuit that state, brake gear and motor are formed can consume the biggish instantaneous electricity that motor rotation generates in time
Pivot electric current avoids the spark damage generated after arcing from switching so that reversing arrangement be avoided arcing occur when carrying out commutation switching,
To improve the service life of switch.
2. commutation brake gear provided by the invention, brake gear is normally closed interlock, can when without pressing operation
Automatically closed circuit is formed with motor, consequently facilitating the biggish instantaneous armature supply that motor rotation generates is consumed in time,
When guarantee carries out commutation switching, reversing arrangement is not in phenomenon of arc discharge.
3. commutation brake gear provided by the invention, by touch spring driving brake moving contact, make the first connection point and
Second, which connects point, keeps connection, so that brake gear be made to be embodied as normally closed interlock；By pressing for motion bar, make the moving contact that brakes
Overcome the biasing force of touch spring to be moved, connects connection a little with second to disconnect first and connect point, make brake gear
Change into off-state；I.e. when pressing motion bar, short circuit of the brake gear to motor is released, motor is made to be able to carry out rotation.
4. a contact of commutation brake gear provided by the invention, the moving contact that brakes can remain company with one end of motor
It connects, is contacted at this point, sliding type can be used with brake moving contact in motion bar, when pressing motion bar downwards, motion bar driving brake
The tip side of contact tilts, and connects electrical connection a little with second to disconnect first and connect point.
5. commutation brake gear provided by the invention, brake moving contact is slidably arranged in switch case, at this point, movable
Bar and brake moving contact need to use relatively-stationary connection, and when pressing motion bar downwards, motion bar can driving brake moving contact cunning
It is dynamic, electrical connection a little is connected with second to disconnect first and connect point.
6. direct current electric power tools switch provided by the invention, can be used for controlling direct current electric power tools, such as electric drill, electric hammer, electricity
Dynamic screwdriver etc., since with commutation brake gear described in any one of above scheme, there is any described above
Advantage.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of the commutation brake gear of the application.
Fig. 2 is the circuit diagram of the commutation brake gear of the prior art.
Fig. 3 is a kind of internal structure part sectional plan view of embodiment of the commutation brake gear of the application.
Fig. 4 is the main view of the brake moving contact in Fig. 3.
Fig. 5 is the schematic perspective view that the motion bar of switch button bottom is connected in Fig. 3.
Fig. 6 is the cooperation schematic front view of brake moving contact and the first connection point and the second connection point in Fig. 3.
Fig. 7 is the schematic diagram after the switch button in Fig. 3 is pressed.
Fig. 8 is the internal structure part sectional plan view of second of embodiment of the commutation brake gear of the application.
Fig. 9 is the main view of the brake moving contact in Fig. 8.
Figure 10 is the motion bar that switch button bottom is connected in Fig. 8 and the main view of brake moving contact cooperation.
Figure 11 is the main view of the cooperation of the brake moving contact and the first connection point and the second connection point in Fig. 8.
Figure 12 is the schematic diagram after the switch button in Fig. 8 is pressed.
Figure 13 is the right view of the commutation brake gear of the application.
Figure 14 is the schematic perspective view of reversing bar.
Figure 15 is the internal structure part sectional plan view of the third embodiment of the commutation brake gear of the application.
Figure 16 is the main view of the brake moving contact in Figure 15.
Figure 17 is the motion bar that switch button bottom is connected in Figure 15 and the stereochemical structure signal of brake moving contact cooperation
Figure.
Figure 18 is the main view of the cooperation of the brake moving contact and the first connection point and the second connection point in Figure 15.
Figure 19 is the main view after the brake moving contact movement in Figure 18.
Figure 20 is the internal structure part sectional plan view of the commutation brake gear after braking moving contact movement.
Description of symbols:
1, commutate brake gear；2, shell；3, switch button；4, reversing arrangement；5, brake moving contact；6, reversing bar；7,
Motor；8, brake gear；9, reset spring；10, first point is connected；11, second point is connected；12, touch spring；13, the first touching
Point；14, support end；15, tail end is stuck up；16, convex block；17, groove；18, sliding block；19, connecting column；20, contact chip；21, the second touching
Point；22, connection ring；23, link block；24, motion bar；25, connection sheet；26, bearing surface.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second " are only
For descriptive purposes, it is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
The present embodiment provides a kind of commutation brake gears 1, as shown in figure 3, include shell 2, switch button 3, motion bar 24,
Reversing arrangement 4 and brake moving contact 5.Wherein, reversing arrangement 4 can be identical as the structure of the prior art, that is, passes through rotation commutation
Bar 6, switching electric current enter the direction in motor 7, to carry out the positive and negative rotation commutation of motor 7.
As shown in Figure 1, reversing arrangement 4 is connected to motor 7 and DC power supply in the circuit diagram of commutation brake gear
Between, electric current is changed by switching and enters the direction in motor 7.And two electric connecting terminals of brake gear 8 respectively with motor 7
Both ends are directly electrically connected, and brake gear 8 forms closed circuit in closed state, with motor 7.
As shown in Fig. 2, the circuit diagram of the commutation brake gear for the prior art, the brake gear 8 of the prior art are logical
It crosses reversing arrangement 4 and motor 7 is formed into a loop；Compared with prior art, two electric connecting terminals of the brake gear 8 of the present embodiment point
It is not electrically connected directly with the both ends of motor 7, without passing through reversing arrangement 4.It, can be without commutation when brake gear 8 is closed
Device 4 and consume in time motor 7 rotation generate biggish instantaneous armature supply, so that reversing arrangement 4 be avoided to carry out
There is arcing when commutation switching, avoids the spark damage generated after arcing from switching, to improve the service life of switch.
As shown in figure 3, slidably connecting motion bar 24 in the inside of switch case 2, switch button 3 is connected to motion bar
24 top, reversing bar 6 is rotatably arranged on the side of switch case 2, and is engaged with the switch button 3.
The bottom end of motion bar 24 is provided with reset spring 9, the holding of switch button 3 can be made to bounce by reset spring 9
State.In switch case 2, also there is brake moving contact 5 and first connect point 10 and for cooperating with brake moving contact 5
Two connect point 11.It is connected with touch spring 12 between the brake moving contact 5 and switch case 2, it can by touch spring 12
It connect the holding of brake moving contact 5 with the first connection point 10 and the second connection 11, so that the first connection 10 is connected with second
Point 11 keeps connection.
It from top to bottom successively include: the first contact 13, support end as shown in figure 4, being the brake moving contact 5 of the present embodiment
14 and stick up tail end 15.It is located at the middle part of brake moving contact 5 in support end 14, rotatably supports and be connected to the switch case 2
It is interior, and connect point 11 with described second and be electrically connected；The one end that tail end 15 is located at the brake moving contact 5 is stuck up, and towards side
It tilts.When brake gear 8 is located at closed state, first contact 13 is connected point 10 with described first and is contacted to keep being electrically connected
It connects.
As shown in figure 5, having for the motion bar 24 connected below the switch button 3 of the present embodiment in the bottom of motion bar 24
There is convex block 16, when pressing down on the switch button 3, the convex block 16 can connect with the tail end 15 that sticks up of the brake moving contact 5
Touching, and resist it is described stick up tail end 15, tilt the first contact 13 of the brake moving contact 5, connect to leave described first
Logical point 10, disconnect described first connect point 10 with second connect a little 11 connected state.
As shown in fig. 6, when switch button 3 keeps lifting status, the first contact of top 13 and first for the moving contact 5 that brakes
It connects point 10 to remain up, the midfoot support end 14 for the moving contact 5 that brakes is connected point 11 with second and remained up, to make first to connect
Logical point 10 connects a little 11 connection with second, and in circuit diagram, display brake gear 8 is closed state.
As shown in fig. 7, switch button 3 drives motion bar 24 to overcome reset spring 9 when pressing switch button 3 downwards
Elastic force moves down, and the convex block 16 of 24 bottom of motion bar is contacted with the tail end 15 that sticks up of brake moving contact 5, so that driving brake is dynamic
13 end of the first contact of contact 5 overcomes the biasing force of touch spring 12 to be upturned, so that disconnecting first connects point 10 and second
Connect the connection of point 11.In circuit diagram, display brake gear 8 is off-state.
As shown in figure 13, the right view for the brake gear that commutates has in the one side towards reversing bar 6 of switch button 3
Two grooves 17 for cooperating with reversing bar 6.When pressing down on switch button 3, need to rotate reversing bar 6 first, so that
Reversing bar 6 slides in one of them in above-mentioned two groove 17, otherwise due to the limitation of reversing bar 6, cannot press down on
Switch button 3.That is, being indicated are as follows: after needing to have switched reversing arrangement 4 first, just can be carried out brake gear in circuit diagram
8 disconnection；Also, in the state that brake gear 8 disconnects, reversing arrangement 4 can not be switched.
As shown in figure 14, in the one side towards switch button 3 of reversing bar 6, have for being inserted into the recessed of switch button 3
Sliding block 18 in slot 17；It is equipped with connecting column 19 at the middle part of reversing bar 6, is rotatablely connected by connecting column 19 and switch case 2；?
The bottom of reversing bar 6 is set to two contact chips 20 for being electrically connected commutation.Wherein, the top of the sliding block 18 is arc-shaped,
Two sides are the inclined-plane become narrow gradually downwards, and after carrying out commutation rotation, the wherein one side of sliding block 18 will be kept reversing bar 6
Vertically, so that the groove 17 with switch button 3 cooperates, sliding block 18 is enable to slide in groove 17.
Embodiment 2
The present embodiment provides a kind of commutation brake gears 1, as shown in figure 8, include shell 2, switch button 3, motion bar 24,
Reversing arrangement 4 and brake moving contact 5.Its structure is most of identical as the commutation brake gear of embodiment 1, also, the brake that commutates
The circuit theory of device is also identical with embodiment 1.The difference is that the brake moving contact 5 of the present embodiment is sliding setting
In switch case 2.
As shown in figure 9, being the brake moving contact 5 of the present embodiment, comprising: the first contact 13, the second contact 21 and connection ring
22.Wherein the first contact 13 is located at the top of brake moving contact 5, when the brake gear 8 is located at closed state, is used for and institute
State the contact electrical connection of the first connection point 10；Second contact 21 is located at the bottom of brake moving contact 5, is located in the brake gear 8
When closed state, electrical connection is contacted for connecting point 11 with described second；Connection ring 22 is connected on brake moving contact 5, is used for
It is connect with the switch button 3.
As shown in Figure 10, Figure 11, when switch button 3 keeps lifting status, the first contact of top 13 for the moving contact 5 that brakes
Point 10 to be connected with first to remain up, the second contact of bottom 21 for the moving contact 5 that brakes is connected point 11 with second and is remained up, thus
The first connection point 10 is set to connect a little 11 connection with second, in circuit diagram, display brake gear 8 is closed state.
As shown in figure 12, when pressing switch button 3 downwards, switch button 3 drives motion bar 24 to overcome reset spring 9
Elastic force moves down, and 24 bottom of motion bar is equipped with link block 23, and link block 23 is plugged in the connection ring 22 of brake moving contact 5
It is interior, thus when motion bar 24 moves down, can driving brake moving contact 5 overcome the biasing force of touch spring 12 to downslide
It is dynamic, it a little 10 is connected with described second so that first contact 13 be made to connect with second contact 21 respectively away from described first
Point 11, make disconnect first connect point 10 with second connect a little 11 connection.In circuit diagram, display brake gear 8 is disconnected
Open state.
As shown in figs. 13 and 14, the switch button 3 of the present embodiment and reversing bar 6 are identical as the structure of embodiment 1.
Embodiment 3
The present embodiment provides a kind of commutation brake gears 1, as shown in figure 15, comprising: including shell 2, switch button 3, live
Lever 24, reversing arrangement 4 and brake moving contact 5.The most of commutation brake gear phase with embodiment 1 and embodiment 2 of its structure
Together, also, the circuit theory for the brake gear that commutates is also identical with embodiment 1 and embodiment 2.The brake moving contact of the present embodiment
5 similarly to Example 2 to be slidably arranged in switch case 2, the difference is that, the shape of the brake moving contact 5 of the present embodiment
Shape, and the other structures cooperated with brake moving contact 5 are improved.
It as shown in figure 16, is the brake moving contact 5 of the present embodiment, comprising: the first contact 13, the second contact 21 and connection sheet
25.Wherein the first contact 13 is located at the top of brake moving contact 5, when the brake gear 8 is located at closed state, is used for and institute
State the contact electrical connection of the first connection point 10；Second contact 21 is located at the bottom of brake moving contact 5, is located in the brake gear 8
When closed state, electrical connection is contacted for connecting point 11 with described second；Connection sheet 25 is bending shape, is connected to the dynamic touching of brake
On first 5, for being cooperatively connected with the switch button 3.
As shown in figure 17, on the motion bar 24 that the bottom of switch button 3 connects, have positioned at the bottom of motion bar 24 and support
Junction 26, when pressing down on the switch button 3, the bearing surface 26 can connect with the connection sheet 25 of the brake moving contact 5
Touching, and the brake moving contact 5 is resisted, make 5 slide downward of brake moving contact, so that disconnecting described first connects 10 Hes of point
Second connects the connected state of point 11.
As shown in figure 18, when switch button 3 keeps lifting status, the first contact of top 13 and for the moving contact 5 that brakes
One, which connects point, 10 remains up, and the second contact of bottom 21 for the moving contact 5 that brakes is connected 11 with second and remained up, to make the
One, which connects point 10, connects a little 11 connection with second, and in circuit diagram, display brake gear 8 is closed state.
As shown in Figure 19, Figure 20, when pressing switch button 3 downwards, switch button 3 drives motion bar 24 to overcome reset bullet
The elastic force of spring 9 moves down, and the bearing surface 26 of 24 bottom of motion bar is contacted with the connection sheet 25 of brake moving contact 5, thus
When motion bar 24 moves down, can driving brake moving contact 5 overcome the biasing force slide downward of touch spring 12, to make institute
It states the first contact 13 and second contact 21 and is connected respectively away from described first and a little 10 connect a little 11 with described second, make to disconnect
First connect point 10 with second connect a little 11 connection.In circuit diagram, display brake gear 8 is off-state.
Embodiment 4
The present embodiment provides a kind of direct current electric power tools switch, using embodiment 1, embodiment 2 or described in embodiment 3 change
To brake gear 1, direct current electric power tools switch is used for electric tool, the specific can be that electric screw driver, electric drill or electric hammer
Deng other structures can be same as the prior art, and this will not be repeated here.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. the commutation brake gear of direct current electric power tools switch characterized by comprising
Reversing arrangement (4) is connected between motor (7) and DC power supply, is changed electric current by switching and is entered in motor (7)
Direction；
Brake gear (8), is connected directly between the both ends of motor (7), in closed state, is formed and is closed back with the motor (7)
Road.
2. commutation brake gear according to claim 1, which is characterized in that the brake gear (8) includes:
Switch button (3) is fixedly connected with the top of motion bar (24)；
Motion bar (24) is slidably connected in switch case (2)；
It brakes moving contact (5), setting links in switch case (2) with the motion bar (24)；
Touch spring (12) is connected between switch case (2) and brake moving contact (5), is had and is kept the brake moving contact
(5) biasing force that the contact on is deviated towards connection status direction；
First connects point (10), is electrically connected with one end of motor (7), when the brake gear (8) is located at closed state, with institute
State the contact contact electrical connection in brake moving contact (5)；
Second connects point (11), is electrically connected with the other end of motor (7), when the brake gear (8) is located at closed state, with
Another contact on brake moving contact (5) contacts electrical connection.
3. commutation brake gear according to claim 2, which is characterized in that the brake gear (8) in off-state,
One contact of brake moving contact (5) is electrically connected with one end of the motor (7).
4. commutation brake gear according to claim 3, which is characterized in that the brake moving contact (5) includes:
Support end (14) is located at the middle part of brake moving contact (5), and support is connected in the switch case (2), and with described the
Two connect point (11) electrical connection；
Tail end (15) are stuck up, is located at the one end of brake moving contact (5), is tilted towards side；
First contact (13) is located relative to described brake moving contact (5) the other end for sticking up tail end (15), fills in the brake
When setting (8) and being located at closed state, point (10) are connected with described first and contact electrical connection.
5. commutation brake gear according to claim 4, which is characterized in that the bottom of the motion bar (24) has convex block
(16), when pressing down on the motion bar (24), the convex block (16) can resist it is described stick up tail end (15), make first touching
Point (13) is tilted, so that leaving described first connects point (10).
6. commutation brake gear according to claim 2, which is characterized in that the brake moving contact (5) is slidably arranged in
In the switch case (2).
7. commutation brake gear according to claim 6, which is characterized in that the brake moving contact (5) includes:
First contact (13) is located at the top of brake moving contact (5), when the brake gear (8) is located at closed state, with institute
State the contact electrical connection of the first connection point (10)；
Second contact (21) is located at the bottom of brake moving contact (5), when the brake gear (8) is located at closed state, with institute
State the contact electrical connection of the second connection point (11).
8. commutation brake gear according to claim 7, which is characterized in that the brake moving contact (5) further include:
Connection ring (22), is connected to the upper end of brake moving contact (5), and the bottom of the motion bar (24) has for being plugged in
Connection ring (22) interior link block (23) is stated, when pressing down on the motion bar (24), the link block (23) can resist described
It brakes moving contact (5), makes brake moving contact (5) slide downward, to make first contact (13) and second touching
Point (21) connects point (10) respectively away from described first and connects point (11) with described second.
9. commutation brake gear according to claim 7, which is characterized in that the brake moving contact (5) further include:
Connection sheet (25), is connected to the upper end of brake moving contact (5), and the bottom of the motion bar (24) has described for abutting
The bearing surface of connection sheet (25), when pressing down on the motion bar (24), the bearing surface can resist the brake moving contact
(5), make brake moving contact (5) slide downward, to make first contact (13) and second contact (21) respectively
It leaves first connection point (10) and connects point (11) with described second.
10. direct current electric power tools switch, which is characterized in that brake and fill including commutation according to any one of claims 1 to 9
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910650259.3A CN110265248A (en) | 2019-07-18 | 2019-07-18 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910650259.3A CN110265248A (en) | 2019-07-18 | 2019-07-18 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110265248A true CN110265248A (en) | 2019-09-20 |
Family
ID=67927044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910650259.3A Withdrawn CN110265248A (en) | 2019-07-18 | 2019-07-18 | The commutation brake gear and direct current electric power tools switch of direct current electric power tools switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110265248A (en) |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 325608 Puqi Industrial Zone, Hongqiao Town, Leqing City, Wenzhou City, Zhejiang Province Applicant after: Kedu Electric Co.,Ltd. Address before: 325608 Puqi Industrial Zone, Hongqiao Town, Leqing City, Wenzhou City, Zhejiang Province Applicant before: KEDU ELECTRIC Co.,Ltd. |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190920 |