CN208903856U - Dynamic touching bridge and motor starter - Google Patents

Abstract

The dynamic touching bridge of one kind, it includes contact plate, movable contact is equipped on the both ends of contact plate side, it is respectively equipped at the both ends of contact plate to the arc leading angle far from the bending of movable contact side, striking notch is equipped between the side of arc leading angle two sides and the end of contact plate, the width of arc leading angle is set to be less than the width of contact plate, the width of arc leading angle is set to be less than the width of contact plate by striking notch, it can play the role of concentrating electric arc, accelerate movement velocity of the electric arc on arc leading angle, the striking ability of arc leading angle can be effectively improved.The motor starter that the utility model is created can effectively improve breaking capacity by the way that dynamic touching bridge is arranged.

Description

Dynamic touching bridge and motor starter

Technical field

The invention is related to Low Voltage Electrical Apparatus, more particularly to a kind of dynamic touching bridge and with the dynamic motor for touching bridge Starter.

Background technique

Device for switching is the important device for controlling electric circuit conducting and disconnecting, and is typically provided with contact mechanism, The dynamic touching bridge and static contact of contact mechanism are respectively connected to electric circuit, pass through being contacting and separating to be connected for dynamic touching bridge and static contact With disconnect electric circuit, such as contactor and relay.In addition, some device for switching are additionally provided with the tripping for protecting electric circuit Mechanism, tripping mechanism can be such that touching bridge separates with static contact when electric circuit breaks down to disconnect electric circuit realization Protection, such as motor starter and breaker.If the electric arc pulled out when dynamic touching bridge and static contact separate can not draw in time Out and extinguish, being not only easy to burn contact mechanism causes device for switching to fail, but also is easy to cause dynamic touching bridge and static contact bonding Together, make device for switching that can not disconnect electric circuit, especially when there are the failures such as short circuit, the electric arc not only pulled out is more Greatly, higher to the breaking capacity requirement of contact mechanism, and at this time if dynamic touching bridge and static contact bond together, it can be to property Very big hidden danger is caused with personal safety.

Typically directly Bending Processing forms existing dynamic touching bridge, and increases arc leading angle in end, but striking angular breadth becomes Change small, electric arc is not easy to concentrate in arc process, and the off speed for often leading to electric arc is slow, is unfavorable for extinguishing electric arc.In addition, When short circuit current by when can air inside heater switch electric appliance, and the electric arc pulled out also can be inside heater switch electric appliance Air, therefore exhaust gear is usually arranged in existing device for switching on shell, but existing exhaust gear is not only vented and leads to Road is too short, and exhaust velocity is too fast, although shell can be discharged heat in time, draught head can reduce and disappear moment It loses, the draught head between gas chamber is unobvious, causes device for switching that can not play the guiding function to electric arc by exhaust airstream, together The off speed that sample also results in electric arc is slow.

Summary of the invention

It is simple, high reliablity dynamic to provide a kind of structure for the defect for aiming to overcome that the prior art of the invention Touch bridge.

To achieve the above object, the invention adopts the technical scheme that

The dynamic touching bridge of one kind comprising contact plate 43 is equipped with movable contact 44, in contact plate on the both ends of 43 side of contact plate 43 both ends are respectively equipped with to the arc leading angle 45 far from 44 side bending of movable contact, the side of 45 two sides of arc leading angle and contact plate It is equipped with striking notch 42 between 43 end, the width a of arc leading angle 45 is made to be less than the width b of contact plate 43.

Optionally, contraction front 47a is respectively equipped on the two sides side of the arc leading angle 45, contraction front 47a is along far from dynamic touching The direction of point 44 is close to each other.

Optionally, the arc leading angle 45 is equipped with the striking convex ribs 41 being arranged along striking direction.

Optionally, the angle d between two contraction front 47a is 20-30 degree.

Optionally, it is respectively equipped with joint face 47b and contraction front 47a on the 45 two sides side of arc leading angle, two of two sides Joint face 47b is arranged in parallel and is arranged with the end vertical of contact plate 43, and two joint face 47b are close to contact plate 43 One end connect with the end face of contact plate 43 and be respectively formed the striking notch 42 that angle is right angle, two joint face 47b are separate One end of contact plate 43 is connect with two contraction front 47a respectively, and two contraction front 47a are mutually leaned on along the direction far from movable contact 44 Closely.

Optionally, one end two contraction front 47a close to each other is connected by arc ignition face 46, and arc ignition face 46 is at arc Face.

Optionally, described 41 one end of striking convex ribs is connect with movable contact 44, and the other end extends to drawing for 45 end of arc leading angle Cambered surface 46.

The invention additionally provides a kind of motor starter, including shell 1 comprising is arranged in dynamic in shell 1 Touching bridge, the arc-chutes 2 with dynamic touching bridge cooperation, and the static contact being oppositely arranged with the dynamic both ends for touching bridge side, move the another of touching bridge Side is connect with reset spring 6.

Optionally, the arc-chutes 2 include the arc extinguishing grid pieces 22 at multiple intervals, and arc extinguishing is equipped on arc extinguishing grid pieces 22 and is open 24, it is equipped with carrier base 13 and run-on tab 3 in the lower section of dynamic touching bridge, the middle part of run-on tab 3 is correspondingly arranged at the lower section of dynamic touching bridge, draws The both ends of arc plate 3 reach the lower section of arc-chutes 2 respectively, and the reset spring 6 is connected between carrier base 13 and dynamic touching bridge.

Optionally, including multiple dynamic touching bridges being set side by side, the side of each dynamic touching bridge is equipped with and dynamic touching bridge both ends point Two static contacts of not corresponding two static contacts, each dynamic touching bridge both ends are corresponding with one respectively, correspond in shell 1 each The both ends of dynamic touching bridge are equipped with arc-chutes 2, and are equipped with exhaust gear 5, exhaust gear 5 far from the side of dynamic touching bridge in arc-chutes 2 Including exhaust passage 51, the air discharge duct 52 cooperated with arc-chutes 2 is equipped on the side wall of 51 side of exhaust passage, in arc-chutes 2 It is equipped with the arc extinguishing air discharge duct 23 shifted to install with air discharge duct 52.

The dynamic touching bridge of the invention makes the width of arc leading angle 45 be less than the width of contact plate 43 by striking notch 42, It can play the role of concentrating electric arc, accelerate movement velocity of the electric arc on arc leading angle 45, arc leading angle 45 can be effectively improved Striking ability.In addition, close to each other along the direction far from movable contact 44 by contraction front 47a, contraction front 47a can further contract Subtract the width of arc leading angle 45 and improves the striking effect of arc leading angle 45.In addition, being set by being arranged on arc leading angle 45 along striking direction The striking convex ribs 41 set form striking channel by striking convex ribs 41, can further increase the speed and effect of striking.This Outside, the invention additionally provides a kind of motor starter of strong breaking capacity.

The motor starter of the invention can effectively improve motor starter by the setting of dynamic touching bridge Breaking capacity, the especially breaking capacity in short circuit.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the invention motor starter；

Fig. 2 is the top view of the invention motor starter；

Fig. 3 is the sectional view of the invention motor starter；

Fig. 4 is the side view of the dynamic touching bridge of the invention；

Fig. 5 is the top view of the dynamic touching bridge of the invention；

Fig. 6 is a kind of embodiment of the invention exhaust gear；

Fig. 7 is the cooperation schematic diagram of the invention arc-chutes and exhaust gear；

Fig. 8 is another three kinds of embodiments of the invention exhaust gear.

Specific embodiment

Below in conjunction with the embodiment that attached drawing 1 to 8 provides, the specific implementation of the device for switching of the invention is further illustrated Mode.The device for switching of the invention is not limited to the following description.

As shown in Figs 1-4, the device for switching of the invention includes shell 1 and the contact mechanism that is arranged in shell 1, Contact mechanism includes dynamic touching bridge and two static contact (not shown)s for being oppositely arranged on dynamic touching bridge two sides, and two are oppositely arranged Static contact be respectively connected to electric circuit, move touching bridge it is mobile close to static contact when, both ends can be contacted with two static contacts respectively Accessed electric circuit is connected, when moving touching bridge far from static contact movement, both ends can leave two static contacts to disconnect The electric circuit of access.The device for switching of the present embodiment is motor starter.

The dynamic touching bridge includes contact plate 43, and the movable contact cooperated with static contact is equipped on the both ends of 43 side of contact plate 44, it is respectively equipped on the end face at 43 both ends of contact plate to the arc leading angle 45 far from 44 side bending of movable contact, 45 two sides of arc leading angle Side and contact plate 43 end between be equipped with striking notch 42, make arc leading angle 45 width a be less than contact plate 43 width B when pulling out electric arc between movable contact 44 and static contact, makes the width of arc leading angle 45 be less than contact plate 43 by striking notch 42 Width, can play the role of concentrating electric arc, accelerate movement velocity of the electric arc on arc leading angle 45, to improve arc leading angle 45 Striking ability.

Further, the width of the arc leading angle 45 is gradually reduced along the direction far from movable contact 44, in arc leading angle 45 Contraction front 47a is respectively equipped on the side of two sides, contraction front 47a is close to each other along the direction far from movable contact 44, contraction front 47a energy The width of enough further reduction arc leading angles 45 and the striking effect for improving arc leading angle 45.The contraction front 47a is preferably plane, and And the angle d between two contraction front 47a is preferably 20-30 degree, certainly, contraction front 47a is also possible to cambered surface, belongs to this hair The protection scope of bright creation.

Further, the arc leading angle 45 is equipped with the striking convex ribs 41 being arranged along striking direction, passes through striking convex ribs 41 Striking channel is formed, the speed and effect of striking can be further increased, of course, it is possible to a striking convex ribs 41 are set, it can also A plurality of striking convex ribs 41 are arranged, the number and shape of striking convex ribs 41 are not specifically limited here, alternatively, can not also set Striking convex ribs 41 are set, the protection scope of the invention is belonged to.

Refering to a kind of specific embodiment for moving touching bridge show Fig. 3-5, moving touching bridge includes contact plate 43, in contact plate 43 Middle part is equipped with spring portion 61, and spring portion 61 passes through the carrier base of reset spring 6 and 1 cavity bottom of shell far from the side of static contact 13 connections, are equipped with the spring boss 62 cooperated with reset spring 6 in spring portion 61, and reset spring 6 can be covered in spring boss It is fixed on 62 with dynamic touching bridge, both ends of the contact plate 43 on the side towards static contact are respectively equipped with movable contact 44, in movable contact It is respectively equipped with positive stop lug boss 49 between 44 and the two sides of spring portion 61, is respectively equipped with arc leading angle on the end face at 43 both ends of contact plate 45, it is equipped with striking notch 42 between the side of 45 two sides of arc leading angle and the end of contact plate 43, keeps the width a of arc leading angle 45 small In the width b of contact plate 43.

Further, the arc leading angle 45 is to the other side bending far from movable contact 44, on 45 two sides side of arc leading angle point Not She You joint face 47b and contraction front 47a, two joint face 47b of two sides it is arranged in parallel and with contact plate 43 End vertical setting, two joint face 47b connect with the end face of contact plate 43 close to one end of contact plate 43 and are respectively formed folder Angle is the striking notch 42 at right angle, and two one end of joint face 47b far from contact plate 43 are connect with two contraction front 47a respectively, Two contraction front 47a are close to each other along the direction far from movable contact 44, and the angle d between contraction front 47a is preferably 20-30 degree.

Further, one end two contraction front 47a close to each other is connected by arc ignition face 46, arc ignition face 46 at Cambered surface, certainly, arc ignition face 46 can also at an acute angle or other shapes, belong to the protection scope of the invention.

Further, the arc leading angle 45 is equipped with positioned at the same side of movable contact 44 and draws in the side towards static contact The middle part of arc leading angle 45 is arranged in arc convex ribs 41, striking convex ribs 41, and one end is connect with stationary contact 44, the other side and arc ignition face 45 connections form striking channel by striking convex ribs 41, can further increase the speed and effect of striking, naturally it is also possible to set Two or more striking convex ribs 41 are set, the protection scope of the invention is belonged to.

As shown in Fig. 1-2,6, the corresponding both ends in dynamic touching bridge of shell 1 are respectively equipped with two exhaust gears being oppositely arranged 5, Exhaust gear 5 includes the exhaust passage 51 that dynamic touching bridge one end is arranged in, in exhaust passage 51 on the side wall of dynamic touching bridge side Equipped with air discharge duct 52, gas vent 53, gas vent 53 and air discharge duct are equipped on side wall of the exhaust passage 51 far from dynamic touching bridge side 52 shift to install, and when 1 air pressure inside of shell increases, by the gas vent 53 and air discharge duct 52 shifted to install, can draw significantly The effective length of long exhaust passage 51 enables 1 inside of shell and outside to extend the retention time of 1 air pressure inside of shell More long draught head is kept, air pressure is run outward along exhaust passage also can pull electric arc to run simultaneously, and draught head improves arc motion Speed is to improve striking ability, and longer exhaust passage 51 can also effectively reduce electric arc and fly out the distance of shell 1, client When in use, it is especially also more convenient in external cabling.

Further, the air discharge duct 52 is shifted to install with arc leading angle 45, by dislocation be arranged air discharge duct 52 and draw Arc angle 45 is able to extend the distance that electric arc flies in shell 1, is further reduced electric arc and flies out the distance of shell 1.

If Fig. 6 shows a kind of embodiment of exhaust gear 5, the shell 1 is corresponding to be all provided with that there are two opposite in each phase The side plate 11 of setting and the end plate 12 being connected between the both ends of two side plates 11, exhaust gear 5 include that setting is being held Partition 54 between plate 12 and the fixed plate 21 of arc-chutes 2 forms the row vertical with side plate 11 between partition 54 and end plate 12 The one end in gas channel 51, partition 54 is connect with the side plate 11 of 1 side of shell, and the side plate 11 of the other end and 1 other side of shell is spaced Setting is to form air discharge duct 52, and end plate 12 is equipped with gas vent 53 on one end far from air discharge duct 52, and present embodiment makes to be vented Slot 52 and gas vent 53 are separately positioned on the head of exhaust passage 51, tail both ends, improve effective length of exhaust passage 51 as much as possible Degree maximizes the delay effect of draught head in shell 1.

Further, as shown in Fig. 3,7, arc-chutes 2 is respectively equipped between the both ends and exhaust gear 5 of dynamic touching bridge, are gone out Arc chamber 2 is equipped with arc extinguishing air discharge duct 23 in the side towards exhaust gear 5, and arc extinguishing air discharge duct 23 is shifted to install with air discharge duct 52, energy Enough avoiding air discharge duct 52 and arc extinguishing air discharge duct 23 from being oppositely arranged makes electric arc directly fly out outside shell 1, can further increase exhaust The striking effect of mechanism 5.Specifically, arc-chutes 2 are oppositely arranged on the both ends of dynamic touching bridge, each arc-chutes 2 include and exhaust The arc extinguishing grid pieces 22 that the fixed plate 21 and multiple intervals that mechanism 5 is oppositely arranged are fixed in fixed plate 21,22 energy of arc extinguishing grid pieces Enough breaking arcs accelerate the extinguishing of electric arc, and electric arc can be introduced into arc-chutes 2 by the arc leading angle 45, to further increase The breaking capacity of device for switching, is equipped with arc extinguishing air discharge duct 23 in fixed plate 21, and arc extinguishing air discharge duct 23 arrives 1 epipleural 11 of shell Distance H2 be greater than or equal to the air discharge duct 52 width H1, avoiding air discharge duct 52 from being oppositely arranged with arc extinguishing air discharge duct 23 makes Electric arc directly flies out outside shell 1, to improve the striking effect of exhaust gear 5.Certainly, the occasion smaller in operating current, or Person can also be not provided with arc-chutes 2 when device for switching accesses the pole N.

If Fig. 8 shows other three kinds of embodiments of exhaust gear 5, the air discharge duct 52 also be can be set in partition 54 Middle part, end plate 12 one or both sides setting with air discharge duct 52 misplace gas vent 53, although exhaust passage 51 it is effective away from Defection is reduced relative to former embodiment, but can also play the effect for keeping air pressure delay in shell 1, is all belonged to In the protection scope of the invention.A kind of specific embodiment of arc-chutes 2 is shown refering to Fig. 2,7, the arc-chutes 2 include The arc extinguishing grid pieces 22 at multiple intervals, arc extinguishing grid pieces 22 include the arc extinguishing portion 22a with dynamic touching bridge cooperation, and are arranged far from dynamic touching The fixed part 22b that bridge side is connect with fixed plate 21 is equipped with the arc extinguishing cooperated with the arc leading angle 45 of dynamic touching bridge on arc extinguishing portion 22a Opening 24, arc leading angle 45 reach the fit inside of arc extinguishing opening 24.

Further, the bottom of the shell 1 is equipped with run-on tab 3, and the middle part of run-on tab 3 is correspondingly arranged under dynamic touching bridge Side, the both ends of run-on tab 3 reach the lower section of arc-chutes 2 respectively, the speed and effect of striking can be further increased by run-on tab 3 Fruit improves the breaking capacity of device for switching.

Further, the fixed plate 21 is at U-shaped comprising is oppositely arranged on the fixed part 22b two of arc extinguishing grid pieces 22 The arc extinguishing side plate 25 of side, and it is connected to the arc extinguishing partition 27 of 25 one end of arc extinguishing side plate, fixed part 22b is arranged two arc extinguishing sides The end of the inside of plate 25, arc extinguishing partition 27 and fixed part 22b cooperate, and arc extinguishing air discharge duct 23 is equipped on arc extinguishing partition 27, The side of the two sides fixed part 22b is respectively equipped with the retaining convex rib 26 connecting with arc extinguishing side plate 25.

The invention additionally provides a kind of motor starter, including multiple dynamic touching bridges being set side by side, each dynamic touching The side of bridge is equipped with two static contacts corresponding with dynamic touching bridge both ends, two static contacts difference at each dynamic touching bridge both ends It is corresponding with one, it further include arc-chutes 2 and tripping protection mechanism (not shown) with dynamic touching bridge cooperation, tripping protection Mechanism can be such that touching bridge separates with static contact and realize protection to disconnect electric circuit when the failures such as short circuit occurs in circuit. The motor starter of the invention includes three-phase, and each phase includes two side plates being oppositely arranged 11 and is connected to End plate 12 between the both ends of two side plates 11 is equipped with a dynamic touching bridge, two arc-chutes 2 and two exhausts in each phase Mechanism 5 moves touching bridge and is arranged between two arc-chutes 2 and two exhaust gears 5, certainly, the motor start-up of the invention Device is also possible to the structure of single-phase, two-phase or four phases, belongs to the protection scope of the invention.In addition, the invention The exhaust gear of dynamic touching bridge and device for switching can be used for breaker, can effectively improve motor starter and breaker Breaking capacity, the especially breaking capacity in short circuit.

It, cannot the above content is combining specific preferred embodiment to be further described to made by the invention Assert that the specific implementation of the invention is only limited to these instructions.For the ordinary skill of the invention technical field For personnel, without departing from the concept of the premise of the invention, a number of simple deductions or replacements can also be made, should all regard For the protection scope for belonging to the invention.

Claims (10)

1. the dynamic touching bridge of one kind, it is characterised in that: including contact plate (43), movable contact is equipped on the both ends of contact plate (43) side (44), it is respectively equipped at the both ends of contact plate (43) to the arc leading angle (45) far from movable contact (44) side bending, arc leading angle (45) striking notch (42) are equipped between the side of two sides and the end of contact plate (43), are less than the width a of arc leading angle (45) The width b of contact plate (43).

2. dynamic touching bridge according to claim 1, it is characterised in that: be respectively equipped on the two sides side of the arc leading angle (45) Contraction front (47a), contraction front (47a) are close to each other along the direction far from movable contact (44).

3. dynamic touching bridge according to claim 1, it is characterised in that: the arc leading angle (45) is equipped with to be arranged along striking direction Striking convex ribs (41).

4. dynamic touching bridge according to claim 2, it is characterised in that: the angle d between two contraction fronts (47a) is 20-30 degree.

5. dynamic touching bridge according to claim 1, it is characterised in that: the company of being respectively equipped on arc leading angle (45) the two sides side Two joint faces (47b) of junction (47b) and contraction front (47a), two sides it is arranged in parallel and with contact plate (43) End vertical setting, two joint faces (47b) connect and distinguish with the end face of contact plate (43) close to the one end of contact plate (43) The striking notch (42) that angle is right angle is formed, the one end of two joint faces (47b) far from contact plate (43) is received with two respectively Contracting face (47a) connection, two contraction fronts (47a) are close to each other along the direction far from movable contact (44).

6. dynamic touching bridge according to claim 5, it is characterised in that: two contraction fronts (47a) it is close to each other one End is connected by arc ignition face (46), and arc ignition face (46) is at cambered surface.

7. dynamic touching bridge according to claim 3, it is characterised in that: described striking convex ribs (41) one end and movable contact (44) are even It connects, the other end extends to the arc ignition face (46) of arc leading angle (45) end.

8. a kind of motor starter, including shell (1), it is characterised in that: including being arranged in shell (1) such as claim Dynamic touching bridge described in 1-7 is any, the arc-chutes (2) with dynamic touching bridge cooperation, and be oppositely arranged with the dynamic both ends for touching bridge side The other side of static contact, dynamic touching bridge is connect with reset spring (6).

9. motor starter according to claim 8, it is characterised in that: the arc-chutes (2) include multiple intervals Arc extinguishing grid pieces (22) are equipped with arc extinguishing opening (24) on arc extinguishing grid pieces (22), the lower section of dynamic touching bridge be equipped with carrier base (13) and Run-on tab (3) is correspondingly arranged at the lower section of dynamic touching bridge in the middle part of run-on tab (3), and the both ends of run-on tab (3) reach arc-chutes respectively (2) lower section, the reset spring (6) are connected between carrier base (13) and dynamic touching bridge.

10. motor starter according to claim 9, it is characterised in that: including multiple dynamic touching bridges being set side by side, often The side of a dynamic touching bridge is equipped with two static contacts corresponding with dynamic touching bridge both ends, two stationary contacts at each dynamic touching bridge both ends Head is corresponding with one respectively, corresponds in shell (1) and is equipped with arc-chutes (2) at the both ends of each dynamic touching bridge, and in arc-chutes (2) Side far from dynamic touching bridge is equipped with exhaust gear (5), and exhaust gear (5) includes exhaust passage (51), in exhaust passage (51) one The side wall of side is equipped with the air discharge duct (52) cooperated with arc-chutes (2), is equipped on arc-chutes (2) and sets with air discharge duct (52) dislocation The arc extinguishing air discharge duct (23) set.