Contactor moving contact assembly

Abstract

The utility model discloses a contactor moving contact assembly, which relates to the technical field of electric control devices, and comprises a moving contact, an upper magnetic conductive sheet and a lower magnetic conductive sheet, the moving contact is provided with a moving contact convex hull protruding downwards, the lower magnetic conductive sheet is internally provided with a lower magnetic conductive sheet pit, the moving contact is matched with the lower magnetic conductive sheet in a plugging manner, and the upper magnetic conductive sheet and the lower magnetic conductive sheet are arranged in the lower magnetic conductive sheet pit. The moving contact convex hull is inserted into the pit of the lower magnetic conductive sheet and is fixedly connected with the pit of the lower magnetic conductive sheet, through the matching structure of the moving contact and the lower magnetic conductive sheet, the positioning effect can be well achieved, the influence of the convex hull on the magnetic conductive performance of the lower magnetic conductive sheet is reduced, the assembly speed is greatly improved, the overall current-carrying capacity of the moving contact is also enhanced, and the service life of the moving contact is prolonged. The magnetic conductive performance of the lower magnetic conductive sheet is also enhanced; due to the pressure of the contact spring at the bottom, the moving contact and the lower magnetic conductive sheet as a whole participate in the contact of the contactor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric control device, concretely relates to a contactor moving contact subassembly. BACKGROUND

[0002] With the rapid development of new energy industry, the requirement of the anti-impact current of the direct current contactor is gradually improved, the traditional product has gradually not adapted to the existing application scene, and part of manufacturers design the structure that the contact head is provided with the electromagnetic system, when the impact current flows in the circuit, the electromagnetic system generates the electromagnetic attraction, and the force generated by the contact spring is used to resist the electric repulsion, so that the continuous arc generated by the separation of the moving contact and the static contact is prevented, and the service life of the product is reduced or even directly burned out, therefore, the connecting method of the lower magnetic conductive sheet and the moving contact is very important, and the common connecting method between the lower magnetic conductive sheet and the moving contact has two conditions: one is that the lower magnetic conductive sheet and the moving contact are fixedly connected together through a limiting block, and this method increases the production cost and reduces the production efficiency; the other is that the lower magnetic conductive sheet and the moving contact are riveted together through a rivet, which increases the number of parts and the material cost, and also increases the management cost and the production process, thereby reducing the production efficiency; meanwhile, due to the larger riveting reserved hole, the utilization rate of the part is low, and the current carrying capacity of the moving contact and the magnetic conductive capacity of the lower magnetic conductive sheet are also affected to a certain extent. SUMMARY

[0003] The utility model aims at solving the technical problem that the production cost is large and the use effect is poor due to the structure of the existing contactor.

[0004] TECHNICAL SCHEME

[0005] In order to solve the above problems, the utility model provides the technical scheme as follows:

[0006] A contactor moving contact subassembly, comprising a moving contact, an upper magnetic conductive sheet and a lower magnetic conductive sheet, wherein the moving contact is provided with a moving contact convex bundle protruding downward, the lower magnetic conductive sheet is provided with a lower magnetic conductive sheet pit, and the moving contact convex bundle is inserted into the lower magnetic conductive sheet pit and fixedly connected.

[0007] Further, the lower magnetic conductive sheet is provided with a contact spring, the bottom of the lower magnetic conductive sheet is provided with a circular convex bundle, the upper side end of the contact spring is surrounded around the circular convex bundle of the lower magnetic conductive sheet, and the circular convex bundle can prevent the contact spring from falling off from the lower magnetic conductive sheet.

[0008] Further, the utility model further comprises a support and a supporting sheet, and the support is surrounded and installed on both sides of the supporting sheet.

[0009] Further, the other end of the contact spring is mounted on the support sheet.

[0010] Further, the moving contact, the upper magnetic sheet and the lower magnetic sheet are mounted in the support frame, and the upper magnetic sheet is fixedly connected with the support frame.

[0011] Further, the lower magnetic sheet is composed of a bottom structure at the bottom and upwardly bent side edge structures at two sides of the bottom structure, the moving contact is mounted in the side edge structures of the lower magnetic sheet, and the moving contact is riveted with the bottom of the recess of the lower magnetic sheet.

[0012] Further, the bottom surface of the upper magnetic sheet is correspondingly arranged with the side edge end surfaces of the two sides of the lower magnetic sheet.

[0013] Further, the auxiliary contact mechanism is further included, the auxiliary contact mechanism is fixed on the support frame, and the auxiliary contact mechanism comprises an auxiliary contact seat, an auxiliary contact moving spring and an auxiliary contact rivet.

[0014] Further, the auxiliary contact moving spring is provided with a U-shaped bent protruding structure.

[0015] Further, the auxiliary contact seat and the auxiliary contact moving spring are integrally injection molded.

[0016] Beneficial effects

[0017] Compared with the prior art, the technical scheme has the beneficial effects that:

[0018] The technical scheme provided by the utility model improves the reliability of the contactor, reduces the cost, improves the efficiency, increases the anti-impact current capacity of the product, through the novel structure, the cross-sectional area of the moving contact is larger, the current carrying capacity is stronger, the product temperature rise is lower, and the performance is stronger. The current carrying capacity and the electromagnetic attraction are increased, through the cooperation structure of the moving contact and the lower magnetic sheet, the positioning effect can be well played, the influence of the protrusion on the magnetic conductivity of the lower magnetic sheet is reduced, the assembly speed is greatly improved, the overall current carrying capacity of the moving contact is also enhanced, and the magnetic conductivity of the lower magnetic sheet is also enhanced; because the contact spring pressure exists at the bottom, the moving contact and the lower magnetic sheet participate in the contact of the contactor as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the utility model embodiment 1;

[0020] Figure 2 It is a vertical cutting structure sectional view of the utility model embodiment 1;

[0021] Figure 3 It is a horizontal cutting structure sectional view of the utility model embodiment 1;

[0022] Figure 4 This is a schematic structural diagram of Example 2 of the present utility model;

[0023] Figure 5 This is a schematic diagram of the installation of Example 2 of the present utility model;

[0024] Figure 6 A vertical cross-sectional view of the installation diagram of Example 2 of the present utility model;

[0025] Figure 7 This is a cross-sectional view of the installation diagram of Example 2 of the present utility model. DETAILED DESCRIPTION

[0026] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] Combined with attachment Figures 1-3 A contactor moving contact assembly includes a moving contact 1, an upper magnetic conductive sheet 3 and a lower magnetic conductive sheet 4. The moving contact 1 is arranged in combination with the upper magnetic conductive sheet 3 and the lower magnetic conductive sheet 4. The lower magnetic conductive sheet 4 consists of a bottom structure and side structures bent upward on both sides. A lower magnetic conductive sheet pit is also provided in the lower magnetic conductive sheet 4. The moving contact 1 is installed in an upwardly open space formed by the side structures on both sides of the lower magnetic conductive sheet 4 and the bottom pit structure. The upper magnetic conductive sheet 3 is installed in the middle of the structures on both sides of the lower magnetic conductive sheet 4. The bottom surface of the upper magnetic conductive sheet 3 is arranged corresponding to the side end surfaces on both sides of the lower magnetic conductive sheet 4.

[0029] The moving contact 1 is provided with a moving contact pit and a moving contact bulge. The moving contact pit is arranged at the top of the moving contact 1, and the moving contact bulge is arranged at the bottom of the moving contact 1 and extends downward to protrude from the moving contact. The moving contact pit and the moving contact bulge are arranged at the center position of the moving contact.

[0030] The inner surface of the bottom of the lower magnetic conductive sheet 4, that is, the upper side of the bottom structure of the lower magnetic conductive sheet 4, is provided with a lower magnetic conductive sheet pit that is vertically recessed downward.

[0031] The moving contact pit and the lower magnetic conductive sheet pit are grooves respectively provided on the moving contact 1 and the lower magnetic conductive sheet 4 .

[0032] The pit of the lower magnetic conductive sheet corresponds to the convex structure of the moving contact, and the convex structure of the moving contact is inserted into the pit of the lower magnetic conductive sheet. By designing the two riveted protrusions on the lower magnetic conductive sheet 4 used for connection in the conventional design into a pit of the lower magnetic conductive sheet, it can not only play a good positioning role but also reduce the influence of the protrusion on the magnetic conductivity of the lower magnetic conductive sheet.

[0033] After the convex of the moving contact is installed in the concave of the lower magnetic conductive sheet, the moving contact 1 is riveted and fixed with the lower magnetic conductive sheet 4. When the electromagnetic force makes the lower magnetic conductive sheet 4 receive the downward electromagnetic attraction, the main stress point of the lower magnetic conductive sheet 4 is changed from the two small convexes for riveting in the prior art to the whole structure of the lower magnetic conductive sheet 4 and the moving contact 1, so that the risk of the lower magnetic conductive sheet falling off the moving contact is fundamentally eliminated, and the reliability of the product is increased.

[0034] The contact spring 5 is arranged on the lower side of the lower magnetic conductive sheet 4, and the outer side of the bottom structure of the lower magnetic conductive sheet 4 is provided with a circular protrusion. The upper side of the contact spring 5 is inserted into the lower magnetic conductive sheet 4 and surrounds the circular protrusion. The contact spring 5 is limited by the circular protrusion of the lower magnetic conductive sheet 4, so that the contact spring 5 cannot fall off the lower magnetic conductive sheet 4.

[0035] Through the cooperation design of the convex of the moving contact inserted into the concave of the lower magnetic conductive sheet, the assembly speed of the moving contact and the lower magnetic conductive sheet is greatly improved. At the same time, due to the cancellation of the two small convexes matched with each other, the overall current carrying capacity of the moving contact 1 is also enhanced, and the magnetic conductive performance of the lower magnetic conductive sheet 4 is also enhanced. Due to the pressure of the contact spring at the bottom, the moving contact 1 and the lower magnetic conductive sheet 4 participate in the contactor contact as a whole.

[0036] The contact spring 5 is installed on the support sheet 6, and the support sheet 6 is provided with the bracket 2 arranged around the two side edges. The combined structure of the upper magnetic conductive sheet 3, the moving contact and the lower magnetic conductive sheet 4 is installed in the frame formed by the bracket 2 and the support sheet 6. The upper magnetic conductive sheet 3 is riveted and fixed with the bracket, so that the combined structure of the upper magnetic conductive sheet 3, the moving contact and the lower magnetic conductive sheet 4 can be stably installed in the bracket 2.

[0037] The push rod 7 is further fixedly arranged at the bottom of the support sheet 6.

[0038] The structure of the moving contact 1 has only one small convex, the cross-sectional area is larger, the current carrying capacity is stronger, the product temperature rise is lower, and the performance is stronger.

[0039] Embodiment 2

[0040] Combined with the drawings Figures 4-7 A contactor moving contact assembly with an auxiliary contact mechanism, based on embodiment 1, selectively installs an auxiliary contact mechanism 8. The auxiliary contact mechanism 8 is usually used for signal transmission and control function, helps to realize the opening and closing of the circuit and the state detection, detects the state of the main contact, ensures that the main contact is correctly disconnected according to the control instruction, and judges whether the main contact is invalid; provides indirect information about the actual switching state, which is used for additional safety consideration.

[0041] The auxiliary contact mechanism 8 is composed of an auxiliary contact seat 801, an auxiliary contact moving spring 802 and an auxiliary contact rivet 803, the auxiliary contact seat 801 is used for mounting the auxiliary contact mechanism 8 on the bracket 2, the auxiliary contact seat 801 is mounted on the bracket 2 and is fixedly connected with the upper magnetic sheet 3 through the auxiliary contact rivet 803, so that the stability of the whole structure can be enhanced, the loosening or falling caused by vibration or external force can be prevented, and the service life of the contactor is prolonged.

[0042] The auxiliary contact spring 802 is mounted on the auxiliary contact seat 801, the auxiliary contact spring 802 extends to both sides, and the auxiliary contact spring 802 is provided with a U-shaped bending protruding structure, so that the moving spring force arm is lengthened, the volume of the auxiliary contact mechanism 8 is reduced, the contact resistance is reduced, the conductivity is enhanced, and the service life is prolonged.

[0043] The auxiliary contact spring 802 and the auxiliary contact seat 801 are integrally formed through injection molding, so that the production process is simplified, the separate processing and assembling steps are reduced, and the production efficiency is improved; through the injection molding mode of the auxiliary contact moving spring and the auxiliary contact seat, a standardized component can be produced, the cost of a single product is reduced, the demand for manual operation is reduced, the production cost is further reduced, the material distribution and shape can be better controlled in production through the injection molding auxiliary contact structure, and the overall reliability and durability of the product are improved.

[0044] The above-mentioned embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A contactor movable contact assembly characterized by, It includes a moving contact, an upper magnetic sheet and a lower magnetic sheet, the moving contact is provided with a downward protruding moving contact bump, the lower magnetic sheet is provided with a lower magnetic sheet pit, the moving contact is inserted into the lower magnetic sheet pit and is fastened and connected.

2. A contactor movable contact assembly as defined in claim 1, wherein The lower magnetic sheet is provided with a contact spring, the bottom of the lower magnetic sheet is provided with a circular protrusion, and the upper side end of the contact spring is surrounded around the circular protrusion of the lower magnetic sheet.

3. A contactor movable contact assembly as defined in claim 2 wherein, It also includes a bracket and a supporting sheet, the bracket is installed around the two sides of the supporting sheet.

4. A contact maker assembly according to claim 3 wherein, The other end of the contact spring is installed on the supporting sheet.

5. A contact maker assembly according to claim 3 wherein, The upper magnetic sheet, the moving contact and the lower magnetic sheet are installed in the bracket, and the upper magnetic sheet is fixedly connected with the bracket.

6. A contactor movable contact assembly as defined in claim 1 wherein, The lower magnetic sheet is composed of a bottom structure at the bottom and upward bending side edge structures at both sides of the bottom structure, the moving contact is installed in the side edge structure of the lower magnetic sheet, and the moving contact abuts against the bottom structure of the lower magnetic sheet.

7. A contact maker assembly according to claim 1 wherein, The bottom surface of the upper magnetic sheet is correspondingly provided with side edge end surfaces at both sides of the lower magnetic sheet.

8. A contact maker assembly according to claim 3 wherein, It also includes an auxiliary contact mechanism, the auxiliary contact mechanism is fixed on the bracket, and the auxiliary contact mechanism includes an auxiliary contact seat, an auxiliary contact moving spring and an auxiliary contact rivet.

9. A contact maker assembly according to claim 8 wherein, The auxiliary contact moving spring is provided with a U-shaped bending protrusion structure.

10. A contactor movable contact assembly as defined in claim 8 wherein, The auxiliary contact seat and the auxiliary contact moving spring are integrally injection molded.

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