阅读说明：本技术 一种缓冲系统及具有其的直流接触器 (buffer systems and have its direct current contactor ) 是由 黄真 于 2019-11-29 设计创作，主要内容包括：本发明涉及高压电器技术领域,具体涉及一种缓冲系统包括：定位件,沿竖直方向穿过衔铁,并固定在铁芯上；所述衔铁具有与所述铁芯吸合时的第一位置,及所述衔铁与所述铁芯断开后,与缓冲件接触时的第二位置；止动件,设置在所述定位件上；缓冲件,设于所述止动件与所述衔铁之间,所述缓冲件具有用于吸收所述衔铁由第一位置运动至第二位置时所释放的动能。本发明还提供了一种电磁系统、辅助触头系统及具有其的直流接触器。本发明有效的解决了衔铁与定位件之间刚性碰撞而造成衔铁和定位件的磨损严重甚至断裂的问题。从而保证了直流接触器在200万次机械寿命后的动作特性和工作性能的稳定性和可靠性。(The invention relates to the technical field of high-voltage electric appliances, in particular to a buffer system which comprises a positioning piece, a stop piece, a buffer piece and a buffer piece, wherein the positioning piece penetrates through an armature iron in the vertical direction and is fixed on an iron core, the armature iron is provided with a th position when being in core wicking with the iron core, and the second position when the armature iron is disconnected with the iron core and is in contact with the buffer piece, the stop piece is arranged on the positioning piece, the buffer piece is arranged between the stop piece and the armature iron, and the buffer piece is provided with a kinetic energy absorbing function for absorbing the kinetic energy released when the armature iron moves from a th position to a second position.)

A buffer system of the type , comprising:

the armature (10) is provided with a th position when being attracted with the iron core (11) and a second position when the armature (10) is disconnected with the iron core (11) and is contacted with a buffer piece (5);

a stopper (1) provided on the positioning member (9);

a buffer member (5) disposed between the stopper member (1) and the armature (10), the buffer member (5) having a function of absorbing kinetic energy released when the armature (10) moves from the th position to the second position.

2. The damping system according to claim 1, characterized in that the damping element (5) has an -th face (6) in mounting contact with the stop element (1) and a second face (7) in contact with the armature (10).

3. The cushioning system of claim 2, wherein the angle between the -th face (6) and the second face (7) is acute.

4. The damping system according to claim 2, further comprising a projection (8) provided on the -th surface (6) for fixing the damping member (5), wherein the projection (8) is fixedly connected to the stopper (1).

5. Cushioning system according to claim 4, characterized in that the bumps (8) are mushroom-shaped.

6. A buffer system according to , wherein the buffer member (5) is made of rubber.

7. Cushioning system according to claim 6, characterized in that the stop (1) comprises:

a fixing plate (2) in a U shape;

the two mounting holes (3) are symmetrically formed in the fixing plate (2) and used for mounting the buffer piece (5);

connecting holes (4) are formed between the mounting holes (3), and the stop piece (1) is detachably connected with the positioning piece (9) through the connecting holes (4).

A DC contactor of the kind 8, , comprising a damping system of any of claims 1-7 through , and further comprising an electromagnetic system and an auxiliary contact system.

9. The dc contactor as recited in claim 8, wherein said electromagnetic system comprises: the armature (10), the iron core (11), the demagnetizing sheet (12) and the magnetic yoke (14) are sequentially arranged along the vertical direction.

10. The dc contactor as claimed in claim 8, wherein said auxiliary contact system comprises:

the push rod (16) is arranged on the base (15) and is fixedly connected with the base (15);

and the auxiliary contact device (22) is arranged below the base (15), and when the armature (10) moves from the second position to the th position, the push rod (16) is abutted with the auxiliary contact device (22) and is used for transmitting an electric signal.

11. The dc contactor as claimed in claim 10, further comprising a position limiting structure; the limit structure comprises:

the limiting piece (17) is arranged on the push rod (16);

and the limiting groove (18) is arranged on the base (15) and is suitable for being inserted by the limiting piece (17) to limit the push rod (16) to move relative to the base (15).

12. The direct current contactor according to claim 11, characterized in that the push rod (16) comprises:

the limiting piece (17) or the limiting groove (18) is arranged on the supporting frame (19), and the longitudinal section of the supporting frame (19) is triangular;

the connecting plate (20) is arranged at the end of the supporting frame (19), and a reinforcing rib (21) is arranged at the joint of the connecting plate (20) and the supporting frame (19).

13. The direct current contactor according to claim 12, characterized in that two bevels (28) are symmetrically provided on the end of the connection plate (20) remote from the support frame (19).

Technical Field

The invention relates to the technical field of high-voltage electric appliances, in particular to buffer systems and a direct-current contactor with the same.

Background

The high-voltage large-current direct-current contactor refers to contactors used in a direct-current loop, is a control electrical appliance applied to fields of rail traffic such as high-speed rails and subways, and is mainly used for starting and stopping a traction motor, and in view of high requirements on operation safety in the fields of rail traffic such as the high-speed rails and the subways, increasingly higher requirements are provided for the direct-current contactor for controlling the traction motor, namely , the direct-current contactor is a control electrical appliance which is frequently operated and has a long mechanical life (up to 200 ten thousand times), and secondly, the action characteristics and performance of the contactor in the mechanical life range meet the requirements on safe, reliable and stable operation.

The current contactor for controlling the large current of the traction motor comprises a driving coil, an iron core, a magnet yoke, a counter force spring and an armature. When the driving coil is de-energized, the armature iron resets upwards under the action of the reaction spring, so that the brake-separating action is completed, and the stroke of the brake-separating is controlled by a positioning piece arranged on the armature iron. However, when the dc contactor performs a switching-off operation, the armature and the positioning element are rigidly collided, which easily causes increased wear and even breakage of the armature and the positioning element due to the rigid collision, thereby causing unreliable operation.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the armature and the positioning member are severely worn or even broken due to rigid collision, so as to provide buffering systems and dc contactors with the buffering systems, which effectively reduce the wear and the breakage of the armature.

In order to solve the above technical problem, the present invention provides buffer systems, including:

the armature has a th position when being in contact with the iron core and a second position when the armature is in contact with a buffer piece after being disconnected with the iron core;

a stopper provided on the positioning member;

and the buffer piece is arranged between the stop piece and the armature, and has a function of absorbing kinetic energy released when the armature moves from the th position to the second position.

, the bumper has a side contacting the stop and a second side contacting the armature.

, the angle between the surface and the second surface is acute.

, the buffer further comprises a bump arranged on the surface and used for fixing the buffer, wherein the bump is fixedly connected with the stop piece.

And , the projection is in mushroom shape.

, the buffer is made of rubber.

, the stop member includes:

a fixing plate in a U shape;

the two mounting holes are symmetrically formed in the fixing plate and used for mounting the buffer parts;

and the connecting holes are formed between the two mounting holes, and the stop piece is detachably connected with the positioning piece through the connecting holes.

The invention also provides DC contactors, which comprise the buffer system, an electromagnetic system and an auxiliary contact system.

And , the electromagnetic system comprises an armature, an iron core, a demagnetizing sheet and a magnetic yoke which are sequentially arranged along the vertical direction.

, the auxiliary contact system includes:

the push rod is arranged on the base and is fixedly connected with the base;

and the auxiliary contact device is arranged below the base, and when the armature moves from the second position to the th position, the push rod is abutted with the auxiliary contact device and is used for transmitting an electric signal.

, the device also comprises a limit structure, wherein the limit structure comprises:

the limiting piece is arranged on the push rod;

and the limiting groove is arranged on the base and is suitable for the limiting piece to be inserted into so as to limit the push rod to move relative to the base.

, the push rod includes:

the limiting piece is arranged on the supporting frame, and the longitudinal section of the supporting frame is triangular;

the connecting plate is arranged at the end of the supporting frame, and a reinforcing rib is arranged on the connection of the connecting plate and the supporting frame.

And , symmetrically arranging two inclined planes on the end part of the connecting plate far away from the supporting frame.

The technical scheme of the invention has the following advantages:

1. the invention provides a buffer system, which comprises a positioning piece, a stop piece, a buffer piece and a buffer piece, wherein the positioning piece penetrates through an armature iron along the vertical direction and is fixed on an iron core, the armature iron is provided with a th position when being in contact with the iron core, and a second position when the armature iron is disconnected with the iron core and is in contact with the buffer piece, the stop piece is arranged on the positioning piece, the buffer piece is arranged between the stop piece and the armature iron and is used for absorbing the kinetic energy released when the armature iron moves from a th position to the second position, the armature iron rapidly moves from a th position to the second position when power is off so as to impact the buffer system, and the buffer piece can effectively absorb the kinetic energy released when the armature iron moves from a th position to the second position due to the arrangement of the buffer piece.

2. The invention provides a damping system, wherein the damping element is provided with an th surface which is contacted with the stop element and a second surface which is contacted with the armature, so that when the armature moves from the th position to the second position, the upper surface of the armature is closely contacted with the second surface, thereby fully absorbing the kinetic energy released by the armature.

3. The buffering system provided by the invention further comprises a bump which is arranged on the th surface and is used for fixing the buffering element, and the bump is fixedly connected with the stopping element.

4. The invention provides a direct current contactor, wherein an electromagnetic system comprises: the armature, the iron core, the demagnetizing sheet and the magnetic yoke are sequentially arranged along the vertical direction. The demagnetizing sheet is arranged between the iron core and the magnetic yoke, so that the direct impact of the armature on the demagnetizing sheet when an electromagnetic system is in attraction is avoided, the mechanical abrasion and brittle fracture of the demagnetizing sheet caused by impact are avoided, and the basic requirement of the action characteristic of a product in 200-ten-thousand mechanical life tests is ensured.

5. The invention provides a direct current contactor, wherein the limiting structure comprises: the limiting piece is arranged on the push rod; and the limiting groove is arranged on the base and is suitable for the limiting piece to be inserted into so as to limit the push rod to move relative to the base. Through the arrangement of the limiting groove and the limiting part, the push rod and the auxiliary contact device are prevented from generating relative displacement when the push rod is in contact with the auxiliary contact device, and therefore the reliability and the stability of the auxiliary contact system during the working operation of the direct current contactor are guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a dc contactor provided in the present invention;

FIG. 2 is a schematic diagram of the buffering system of FIG. 1;

FIG. 3 is a schematic view of the stopper of FIG. 2;

FIG. 4 is a schematic view of the buffer of FIG. 2;

FIG. 5 is a schematic structural view of the positioning member shown in FIG. 2;

FIG. 6 is a schematic structural view of the push rod of FIG. 1;

FIG. 7 is a schematic structural view of the base of FIG. 1;

FIG. 8 is a schematic structural view of the base engaged with the push rod;

description of reference numerals:

1-stop piece, 2-fixing plate, 3-mounting hole, 4-connecting hole, 5-buffer piece, 6- th surface, 7-second surface, 8-convex block, 9-locating piece, 10-armature, 11-iron core, 12-demagnetizing piece, 13-fastening piece, 14-magnetic yoke, 15-base, 16-push rod, 17-position limiting piece, 18-position limiting groove, 19-supporting frame, 20-connecting plate, 21-reinforcing rib, 22-auxiliary contact device, 23-rocker arm, 24-rolling wheel, 25-counter-force spring, 26-mounting plate, 27-coil, 28-inclined surface and 29-nut;

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are partial embodiments, but not all embodiments .

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 8, the buffering systems provided in this embodiment of the present invention include a positioning member 9 vertically passing through an armature 10 and fixed on an iron core 11, the armature 10 having a position when engaging with the iron core 11 and a second position when contacting with a buffering member 5 after the armature 10 is disconnected from the iron core 11, a stop member 1 disposed on the positioning member 9, and a buffering member 5 disposed between the stop member 1 and the armature 10, the buffering member 5 having a function of absorbing kinetic energy released when the armature 10 moves from a position to the second position.

The positioning member 9 is made of a stainless steel vehicle, in the embodiment, as shown in fig. 5, the positioning member 9 is T-shaped, a through hole is formed in the center of the positioning member 9, and the fastening member 13 penetrates through the through hole to fix the stop member 1 and the positioning member 9 on the iron core 11, so as to be fixedly connected with the iron core 11, in the present embodiment, the fastening member 13 is a screw, the th position is a position where the armature 10 is located when the armature 10 is attracted to the iron core 11, and the second position is a position where the armature 10 is in contact with the buffer member 5 when the armature 10 is disconnected from the iron core 11, when the power is off, the iron core 11 eliminates attraction force to the armature 10, so that the armature 10 rapidly moves from the th position to the second position under the action of the reaction spring 25, so as to impact the buffer system, because the buffer member 5 is made of a rubber material, the buffer member 5 can effectively absorb kinetic energy released when the armature 10 moves from the th position to the second position, so as to avoid rigid collision between the armature 10 and the positioning member, thereby ensuring the operational stability and the operational reliability of the direct current.

3-4, said buffer member 5 has a face 6 contacting said stop member 1, and a second face 7 contacting said armature 10, said second face 7 forming an angle with the plane of said core 11, and said angle with the plane of said armature 10 in the second position being . when the armature 10 moves from the second position to the second position, the upper face of the armature 10 can be completely contacted with the second face 7, thereby completely absorbing the kinetic energy released by the armature 10. in this embodiment, the longitudinal section of the buffer member 5 is a right trapezoid, the face 6 is the top face of the buffer member 5 and is contacted with the inner face of the stop member 1, the second face is the bottom face of the buffer member 5, and the angle with said second face face 6 is an acute angle.A included angle between the second face 6 and the second face 7 is an acute angle, which facilitates the close contact between the second face 7 and the armature 10, and an included angle between the second face face 6 and the second face 7 is set according to the actual angle of the armature 10.

The -th surface 6 is provided with a bump 8 for fixing the buffer member 5, the bump 8 is fixedly connected with the stop member 1, the stop member 1 comprises a fixing plate 2 which is U-shaped, two mounting holes 3 which are symmetrically arranged on the fixing plate 2 and used for mounting the buffer member 5, and a connecting hole 4 which is arranged between the two mounting holes 3, and the stop member 1 is detachably connected with the positioning member 9 through the connecting hole 4.

In this embodiment, the two buffer members 5 are symmetrically arranged at two ends of the fixing plate 2. the bump 8 is arranged in a mushroom shape, the bump 8 and the buffer members 5 are formed by injection molding and pressing of polyurethane rubber, so that the fixing plate has -shaped elasticity, the bump 8 can be conveniently and directly installed in the two installation holes 3 on the retainer 1, and the buffer members 5 are fixed on the fixing plate 2. the fixing plate 2 is arranged in a U shape, the fixing plate 2 can be conveniently in full contact with the buffer members 5, the buffer members 5 are wrapped in the fixing plate 2, and a better fixing effect is achieved, meanwhile, the connecting holes 4 are arranged, so that the fastening members 13 can conveniently penetrate through the retainer 1 and the positioning members 9, and the retainer 1 is fixed above the positioning members 9.

In the embodiment, the aperture of the through hole formed in the armature 10 is larger than the aperture of the connecting hole 4 through which the positioning piece 9 penetrates, and the positioning piece 9 is in movable fit with the armature 10, so that friction between the hole wall of the through hole in the armature 10 and the peripheral wall of the positioning piece 9 is prevented, and friction resistance in the movement process is reduced when the armature 10 moves from the th position to the second position or from the second position to the th position.

As shown in FIG. 1, the invention also provides DC contactors including not only the buffer system, but also the electromagnetic system and the auxiliary contact system, wherein the buffer system is arranged above the electromagnetic system.

In this embodiment, the electromagnetic system includes: the armature 10, the iron core 11, the coil 27 sleeved on the outer peripheral wall of the iron core 11, the demagnetizing sheet 12 and the magnetic yoke 14 are sequentially arranged along the vertical direction. The demagnetizing sheets 12 are arranged between the iron core 11 and the magnetic yoke 14 and fixed on the mounting plate 26 through fasteners 13, wherein the demagnetizing sheets 12 and the fasteners 13 are made of non-magnetic metal materials and have strong tensile and compressive mechanical strength. The direct impact of the armature 10 on the demagnetizing sheet 12 in the attracting process of an electromagnetic system is avoided, so that the mechanical abrasion and brittle fracture of the demagnetizing sheet 12 caused by motion impact are avoided, and the basic requirement of the action characteristic of the product in 200 ten thousand mechanical life tests is ensured.

As shown in fig. 6-8, the auxiliary contact system includes a push rod 16 disposed on a base 15 and fixedly connected to the base 15, an auxiliary contact device 22 disposed below the base 15 and close to the iron core 11, wherein the push rod 16 abuts against the auxiliary contact device 22 when the armature 10 moves to a position, so as to transmit an electrical signal indicating whether the armature 10 is engaged with or disengaged from the iron core 11, wherein the base 15 is disposed on the armature 10 at a end far from the reaction spring 25, and the push rod 16 is fixed on the base 15 by a fastener 13 and a nut 29, in the present embodiment, a limit groove 18 is disposed on the base 15, a limit piece 17 is disposed on the push rod 16, in the present embodiment, the limit groove 18 is a dovetail groove, the limit piece 17 is a boss, the push rod 16 includes a support bracket 19, and a longitudinal cross section of the support bracket 19 is triangular, a connecting plate 20 is disposed on a end of the support bracket 19, a reinforcing rib 21 is disposed at a connecting portion between the connecting plate 20 and the support bracket 19, so that the connecting plate 19 is disposed at a bevel 20, so as to ensure that the contact with the connecting plate 20 is more symmetrical bevel of the auxiliary contact device 20, and the auxiliary contact device is disposed on the push rod 18, so as to ensure that the contact device is capable of the contact with the push rod 16, when the contact device, the contact device is moved to the rocker arm 18, the contact device is moved to a smooth bevel of the auxiliary contact device, so as the contact device, the push rod 18, the contact device is moved to the auxiliary contact device is a smooth bevel of the auxiliary contact device, so as to ensure that the contact device is moved between the rocker arm.

As an alternative embodiment, the limit groove 18 is provided on the push rod 16, and the limit member 17 is provided on the base 15.

When the direct current contactor is powered on, the coil 27 generates electromagnetic force and attracts the armature 10 to move from the second position to the th position, so as to drive the base 15 to move towards the auxiliary contact system, so as to conduct an electric signal, when the direct current contactor is powered off, the armature 10 rapidly moves from the th position to the second position under the action of the reaction spring 25, so as to impact the buffer system, so that the buffer 5 can effectively absorb the kinetic energy released when the armature 10 moves from the th position to the second position.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.