Contactor static contact center distance high-precision positioning device

Abstract

The utility model discloses a contactor static contact center distance high-precision positioning device, which comprises two static contacts oppositely arranged on the top surface of a contactor, and each static contact is integrally formed by a contact main body and an annular step part outside the contact main body; a conical positioning hole is formed in the top surface of the static contact; the radius of the annular step is larger than that of the static contact; conical bosses are arranged at the positions, corresponding to the conical positioning holes, of the bottom face of the welding clamp, and the conical bosses correspond to the corresponding conical positioning holes. The center distance tolerance of the static contact can be reduced; the conical hole is designed on the surface of the static contact, and the conical boss is designed on the welding fixture, so that the conical boss of the welding fixture is used for positioning the conical hole of the static contact, and further the center distance tolerance of the static contact is controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to contactor static contact center distance high accuracy positioning device. BACKGROUND

[0002] The ceramic assembly industry can only reach the center distance precision of plus or minus 0.15mm; during the brazing process of ceramic and static contact, ceramic welding fixture (graphite material) is used to position static contact (copper) and ceramic (alumina), and the current static contact positioning is positioned by the outer diameter.

[0003] During the brazing process, the ring temperature is heated to more than 800 degrees, but the static contact thermal expansion is about 0.10mm, and the graphite thermal expansion coefficient is very low, about 0.02mm expansion, so the static contact outer diameter expansion space is large, so the graphite fixture reserved limit hole is at least 0.1mm, which further leads to the relative position deviation of static contact and ceramic during the brazing process, and the current static contact center distance tolerance can only meet 0.15mm.

[0004] The current brazing process has the following shortcomings: 1. during the contactor assembly process, the static contact center distance is too large to cause installation displacement, which further causes the copper bar displacement to cause stress or connection not firm, and the problem of large contact resistance occurs, 2. if the contact and the copper bar are connected by welding, because the copper bar is fixed in the BDU base by injection molding, if the contactor contact center distance difference is too large, the copper bar hole can only be increased, but this is not conducive to welding, so the precision needs to be within plus or minus 0.1mm to meet the requirements. INVENTION CONTENTS

[0005] In view of the above problems, the utility model aims at providing a contactor static contact center distance high accuracy positioning device which can reduce the static contact center distance tolerance.

[0006] The technical scheme of the utility model is as follows

[0007] The contactor static contact center distance high accuracy positioning device comprises two static contacts oppositely arranged on the top surface of the contactor, and the static contact is integrally formed by the contact main body and the annular step portion outside the contact main body; a conical positioning hole is arranged on the top surface of the static contact, and the radius of the annular step is greater than the radius of the static contact; a conical boss is arranged on the bottom surface of the welding fixture at the position corresponding to the conical positioning hole, and the conical boss corresponds to the corresponding conical positioning hole.

[0008] The annular step portion is located on the upper half of the contact main body.

[0009] The outer surface of the contact main body above the annular step is a conical surface.

[0010] A strip-shaped groove is arranged on the top surface of the contactor between the two contact main bodies, and the length of the strip-shaped groove is greater than the diameter of the contact main body.

[0011] The contact body between the annular step and the top surface of the contactor is provided with a supporting ring.

[0012] The technical scheme is adopted, a tapered hole is designed on the surface of the static contact, and a tapered boss is designed on the welding fixture, the tapered boss of the welding fixture is positioned on the tapered hole of the static contact, and then the center distance tolerance of the static contact is controlled.

[0013] When the welding ring temperature reaches more than 800 degrees, the static contact tapered hole expands and becomes smaller, and the welding fixture boss expands slightly, but because they are both tapered structures, only the coaxial degree needs to be ensured to meet the requirements, the axis is still unchanged, and the center distance of the two static contacts can still be ensured, and through actual sample verification, the tolerance of the center distance of the static contact can meet ±0.05mm. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a top view structural schematic diagram of the utility model;

[0015] Figure 2 It is a sectional view structural schematic diagram of the utility model;

[0016] Figure 3 It is a tapered boss structural schematic diagram of the utility model;

[0017] In the drawings, 1 is a contactor, 2 is a static contact, 3 is a contact body, 4 is an annular step, 5 is a tapered positioning hole, 6 is a tapered boss, 7 is a tapered surface, 8 is a strip-shaped groove, and 9 is a supporting ring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] The application discloses a high-precision positioning device for the center distance of a contactor static contact, which comprises two static contacts 2 oppositely arranged on the top surface of the contactor 1, and the static contact is integrally formed by a contact main body 3 and a ring-shaped step 4 outside the contact main body; the top surface of the static contact is provided with a conical positioning hole 5, and the radius of the ring-shaped step is larger than the radius of the static contact; the bottom surface of a welding clamp is provided with a conical boss 6 at a position corresponding to the conical positioning hole, and the conical boss corresponds to the conical positioning hole. During welding, the conical boss is inserted into the conical positioning hole to realize pre-positioning; since the conical boss and the conical positioning hole are both conical structures, only the coaxial degree needs to be ensured to meet the requirements, and then the tolerance of the center distance of the static contact can meet the requirement of ±0.05 mm.

[0020] The ring-shaped step is located on the upper half of the contact main body.

[0021] The outer surface of the contact main body above the ring-shaped step is a conical surface 7. The conical surface of the outer surface of the contact main body is opposite to the vertex of the conical positioning hole, thereby facilitating machining.

[0022] A strip-shaped groove 8 is arranged on the top surface of the contactor between the two contact main bodies, and the length of the strip-shaped groove is larger than the diameter of the contact main body. During welding, the strip-shaped groove provides a space for deformation.

[0023] A supporting ring 9 is arranged on the contact main body between the ring-shaped step and the top surface of the contactor. The supporting ring has the functions of auxiliary support during welding and reinforcing rib for reinforcing the contact main body.

Claims

1. A high-precision positioning device for the center distance of a contactor stationary contact, characterized in that, The contactor top surface is oppositely provided with two static contacts, the static contact is integrally formed by a contact body and an annular step portion outside the contact body; the static contact top surface is provided with a conical positioning hole, the annular step radius is greater than the static contact radius; the welding fixture bottom surface is also provided with a conical boss at a position corresponding to the conical positioning hole, and the conical boss corresponds to the corresponding conical positioning hole.

2. The contactor stationary contact center distance high precision positioning device according to claim 1, characterized in that, The annular step portion is located on the upper half of the contact body.

3. The contactor stationary contact center distance high precision positioning device according to claim 1, characterized in that, The outer surface of the contact body above the annular step is a conical surface.

4. The contactor stationary contact center distance high precision positioning device according to claim 1, characterized in that, A strip-shaped groove is arranged on the contactor top surface between the two contact bodies, and the length of the strip-shaped groove is greater than the diameter of the contact body.

5. The contactor stationary contact center distance high precision positioning device according to claim 1, characterized in that, A support ring is arranged on the contact body between the annular step and the contactor top surface.

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