CN216435807U - The connection structure of the push rod and the moving iron core of the high-voltage DC relay - Google Patents

Abstract

The utility model discloses a connecting structure of a push rod and a movable iron core of a high-voltage direct-current relay, which comprises a sleeve made of the push rod, the movable iron core and a metal material; the push rod polish rod is matched in the through hole of the movable iron core; the movable iron core is provided with a first groove with a downward opening; the sleeve is sleeved outside the push rod, and a part of the sleeve extends into the first groove; the push rod is provided with a concave part; the inner wall of the sleeve is provided with a convex part; the sleeve and the push rod are riveted or cold extruded, so that the protruding part of the sleeve is clamped into the concave part of the push rod. The utility model can effectively solve the problem of thread eccentricity by using the polished rod to position and canceling the threaded connection, and can solve the problem that the rotation of the iron core in the X/Y direction can not be effectively limited due to the clearance existing between the top and the bottom of the internal thread and the external thread; the glue is dispensed by adopting the stop piece to stop the position, so that the defects of organic matters, cracking, generation of foreign matters and the like caused by glue dispensing can be avoided, the time required by glue dispensing and curing is reduced, and the production speed is further improved.

Description

The connection structure of the push rod and the moving iron core of the high-voltage DC relay

technical field

The utility model relates to the technical field of relays, in particular to a connection structure of a push rod and a moving iron core of a high-voltage direct current relay.

Background technique

The high-voltage DC relay in the prior art usually adopts a moving reed direct-acting type (also known as a solenoid direct-acting type) structure, and the contact part of this high-voltage DC relay includes two static contacts (ie, the load lead-out end). And a moving assembly, the moving assembly includes a moving spring part and a push rod assembly. The moving spring part is bridge-fitted between the two static contacts and mounted on the top of the push rod assembly. The two moving contacts of the moving spring part are in contact with or separate from the two stationary contacts respectively. When in contact, the current flows in from one of the static contacts and flows out from the other static contact after passing through the moving spring part. The push rod assembly includes the push rod and the moving iron core connected to the lower part of the push rod (the top of the push rod is usually connected to the spring seat in the push rod assembly). To drive the push rod to move back and forth, since the moving iron core needs to move synchronously with the push rod, the moving iron core needs to be fixed at the lower part of the push rod. In the prior art, the cooperation between the outer thread of the push rod and the inner thread of the movable iron core is usually used to limit the movement and rotation of the movable iron core relative to the push rod in the X/Y direction of the horizontal plane, and the bottom of the movable iron core and the push rod are used to limit the movement and rotation of the movable iron core. Dispensing and fixing method to limit the movement and rotation of the moving iron core relative to the push rod in the Z direction.

This method of threaded connection in the prior art cannot effectively limit the rotation of the moving iron core in the X/Y direction due to the gap between the tooth crest and the tooth bottom between the internal and external threads, and the problems of eccentricity and skew of the axis occur, which makes the There is more serious interference in the product movement process, which affects the electrical parameters such as product pull-in and rebound. At the same time, the contact surface and the dynamic and static iron core contact are not parallel when closing, which reduces the stability of the holding force, resulting in the dispersion of the product's short-circuit resistance performance. However, the use of glue dispensing to limit the movement and rotation of the moving iron core in the Z direction has the following disadvantages: First, due to the long-term movement of the product, closed contact, and long-term high temperature work, there is a risk of cracking the glue and producing foreign matter. risk, serious defects such as non-conduction of the product will be caused; the second is the volatilization of organic substances, which affects the atmosphere of the sealed cavity and causes the arc extinguishing ability to decrease; the third is the long production cycle and slow rhythm, and the current production is 110 ℃, oven baking and cooling> 40mins, and the equipment occupies a large area and has a large investment; fourth, it is more difficult to control the amount of liquid, the amount of glue is easy to overflow, the amount of glue is small and unreliable, and it is easy to generate air bubbles.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and to provide a connection structure between the push rod and the moving iron core of a high-voltage DC relay. By using the polished rod for positioning, the threaded connection is eliminated, which can effectively solve the problem of thread eccentricity and improve the problem of thread eccentricity. There is a gap between the tooth top and the bottom of the tooth, which cannot effectively limit the rotation of the iron core in the X/Y direction; by using the stopper to stop the dispensing, it can not only avoid the defects such as organic matter, cracking and foreign matter caused by the dispensing, etc. At the same time, the time required for dispensing and curing is reduced, thereby increasing production speed.

The technical solution adopted by the utility model to solve the technical problem is as follows: a connection structure of a push rod and a moving iron core of a high-voltage DC relay, comprising a push rod, a moving iron core and a sleeve made of metal materials; The upper position of the lower section of the rod is provided with a downward step, and the step of the push rod abuts on the upper surface of the movable iron core; the movable iron core is provided with a through hole that penetrates up and down, and the lower section of the push rod The middle part of the polished rod is fitted in the through hole of the moving iron core; the position of the bottom of the moving iron core corresponding to the through hole is provided with a first groove with an opening facing downward; the sleeve is sleeved outside the push rod and makes the A part of the sleeve protrudes into the first groove, and the top end of the sleeve abuts against the groove bottom of the first groove; in the lower section of the push rod, at a position corresponding to the outside of the first groove , and is also provided with a recessed part that is recessed radially inward; in the inner wall of the sleeve, corresponding to the position of the recessed part of the push rod, there is also a convex part; the sleeve and the push rod are riveted or Cold extrusion process, so that the protrusion of the sleeve is clamped into the depression of the push rod under the action of riveting or cold extrusion, and the expansion force after riveting or cold extrusion is conducted through the sleeve itself, and the top of the sleeve is It reacts to the moving iron core and tightens it.

There is clearance fit between the inner wall of the sleeve and the outer wall of the push rod.

The concave portion of the push rod is an annular groove provided on the outer peripheral wall of the push rod, and the protruding portion of the inner wall of the sleeve is a corresponding matching annular convex strip.

The annular groove of the push rod is one or a plurality of annular grooves are arranged at intervals from each other, and the annular protruding portion of the inner wall of the sleeve is also a corresponding one or a plurality of annular grooves arranged at an interval from each other.

The concave portion of the push rod is a knurled structure surrounding the outer peripheral wall of the push rod, and the protruding portion of the inner wall of the sleeve is a correspondingly matched knurled shape.

The knurled structure of the push rod is one or a plurality of bars are arranged at intervals, and the annular protrusions of the inner wall of the sleeve are also a corresponding one or a plurality of bars are arranged at intervals.

In the outer wall of the sleeve, at a position corresponding to the protruding portion, a first concave channel is provided.

The protruding part of the inner wall of the sleeve is formed by the outer wall of the sleeve after hitting the first concave channel.

In the outer wall of the sleeve, an annular second groove is also provided near the top.

The upper part of the movable iron core is provided with a second groove with an upward opening at a position corresponding to the through hole; the step of the push rod abuts at the bottom of the second groove of the movable iron core.

The bottom of the moving iron core is also provided with a third groove that communicates with the axis direction of the first groove, and the first groove is relatively small, the third groove is relatively large, and the first groove is inward , the third groove is outside; the bottom end of the lower section of the push rod is completely accommodated in the third groove.

Compared with the prior art, the beneficial effects of the present utility model are:

The utility model adopts the polished rod of the lower section of the push rod to fit in the through hole of the moving iron core and the sleeve made of metal material as the stop part for restricting the downward movement of the moving iron core relative to the push rod , and in the lower section of the push rod, at a position corresponding to the outside of the first groove, there is also a concave portion recessed radially inward; in the inner wall of the sleeve, a position corresponding to the concave portion of the push rod is provided , and a protruding part is also provided; the riveting or cold extrusion process is used between the sleeve and the push rod, so that the protruding part of the sleeve is clamped into the depression of the push rod under the action of riveting or cold extrusion. , and use the expansion force after riveting or cold extrusion to conduct through the sleeve itself, and the top of the sleeve reacts to the moving iron core to tighten it. The structure of the present utility model eliminates the threaded connection by using the polished rod for positioning, which can effectively solve the problem of the eccentricity of the thread, improve the gap between the tooth crest and the tooth bottom between the internal and external threads, and cannot effectively limit the rotation of the iron core in the X/Y direction. Problem; by using the sleeve stop to cancel the dispensing, it can not only avoid defects such as organic matter, cracking and foreign matter caused by dispensing, but also reduce the time required for dispensing and curing, thereby increasing the production speed.

The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments; however, the connection structure between the push rod and the moving iron core of a high-voltage DC relay of the present utility model is not limited to the embodiments.

Description of drawings

Fig. 1 is the front view of the partial structure of the high voltage direct current relay of the first embodiment of the present utility model;

2 is a bottom view of the partial structure of the high-voltage DC relay according to the first embodiment of the present invention;

3 is a side view of the partial structure of the high-voltage DC relay according to the first embodiment of the present invention;

Fig. 4 is a sectional view along line A-A in Fig. 1;

5 is an exploded schematic view of the partial structure of the high-voltage DC relay according to the first embodiment of the present invention;

Fig. 6 is a sectional view along line B-B in Fig. 5;

Fig. 7 is the enlarged schematic diagram of C part in Fig. 6;

Fig. 8 is the enlarged schematic diagram of D part in Fig. 6;

9 is a front view of the partial structure of the high-voltage DC relay according to the second embodiment of the present invention;

Figure 10 is a cross-sectional view along line E-E in Figure 9;

11 is an exploded schematic view of the partial structure of the high-voltage DC relay according to the second embodiment of the present invention;

Figure 12 is a sectional view taken along line F-F in Figure 11;

Fig. 13 is the enlarged schematic diagram of part G in Fig. 12;

FIG. 14 is an enlarged schematic view of part H in FIG. 12 .

Detailed ways

Example 1

Referring to FIGS. 1 to 8 , the connection structure between the push rod and the moving iron core of a high-voltage DC relay of the present invention includes a push rod 1, a moving iron core 2 and a sleeve 3 made of metal materials; this The high-voltage DC relay also includes components such as a yoke plate 41, a spring seat 42, a static iron core 43 and a return spring 44. The spring seat 42 is fixed on the top of the push rod 1, and the spring seat 42 is on the yoke plate 41. The seat 42 is usually also connected with a fixed piece 45, the static iron core 43 is fixed under the yoke iron plate 41, and the push rod 1 passes through the yoke iron plate 41 and the static iron core 43 from the upper surface of the yoke iron plate 41, and is connected with the static iron core 43. The lower moving iron core 2 is connected, and the return spring 44 is arranged between the static iron core 43 and the moving iron core 2; the upper position of the lower section of the push rod 1 is provided with a downward step 11, and the push rod 1 The step 11 of the moving iron core 2 abuts on the top of the moving iron core 2, and the moving iron core 2 is restricted from moving upward relative to the push rod by the limiting effect of the step 11; The polished rod in the middle part of the lower section of the push rod 1 is fitted in the through hole 21 of the moving iron core 2; the position of the bottom of the moving iron core 2 corresponding to the through hole 21 is provided with a first groove 22 with an opening facing downward ; The sleeve 3 is sheathed outside the push rod 1 and makes a part of the sleeve 3 protrude into the first groove 22, and the top of the sleeve 3 abuts against the groove bottom 221 of the first groove 22 ; In the lower section of the push rod 1, at a position corresponding to the outside of the first groove 22, there is also a concave portion 12 recessed radially inward; in the inner wall of the sleeve 3, corresponding to the position of the push rod 1 The position of the concave portion 12 is also provided with a protruding portion 31; the riveting or cold extrusion process is performed between the sleeve 3 and the push rod 1, so that the protruding portion 31 of the sleeve 3 is formed under the action of riveting or cold extrusion. It is clamped into the depression 12 of the push rod 1, and the expansion force is transmitted through the sleeve 3 itself after riveting or cold extrusion. The moving iron core 2 is restricted from moving downward relative to the push rod.

In this embodiment, the inner wall of the sleeve 3 and the outer wall of the push rod 1 are in clearance fit.

In this embodiment, the concave portion 12 of the push rod 1 is an annular groove provided on the outer peripheral wall of the push rod, and the protruding portion 31 of the inner wall of the sleeve 3 is a corresponding matching annular convex strip.

In this embodiment, the annular groove 12 of the push rod 1 is one, and the annular protrusion 31 of the inner wall of the sleeve 3 is also a corresponding one. Of course, the annular grooves 12 of the push rod 1 can also be arranged in multiples spaced from each other, and the annular protrusions of the inner wall of the sleeve can also be arranged in a plurality of correspondingly spaced-apart portions.

Of course, the concave portion is not limited to the annular groove structure, but can also be a knurled structure surrounding the outer peripheral wall of the push rod. Of course, the protruding portion of the inner wall of the sleeve is also set to a corresponding matching knurled shape.

Similarly, the knurling structure of the push rod can be one or a plurality of ones spaced apart from each other, and the annular protrusions of the inner wall of the sleeve are also configured to be one corresponding one or a plurality of bars spaced apart from each other.

In this embodiment, the outer wall of the sleeve 3 is provided with a first concave channel 32 at a position corresponding to the protruding portion 31 .

In this embodiment, the protruding portion 31 of the inner wall of the sleeve 3 is formed by the outer wall of the sleeve 3 by hitting the first concave channel 32 .

In this embodiment, the outer wall of the sleeve 3 is further provided with an annular second groove 33 near the top. The provision of the second concave channel 33 enables expansion and deformation at this position during the riveting or cold extrusion process between the sleeve 3 and the push rod 1 , so as to better press the movable iron core 2 tightly.

In this embodiment, the upper part of the movable iron core 2 is provided with a second groove 23 with an upward opening at the position corresponding to the through hole; the step 11 of the push rod 1 abuts against the second groove of the movable iron core 2 at the groove bottom 231 of the groove 23 . At the same time, the second groove 23 is also used for assembling the return spring 44 .

The connecting structure of the push rod and the moving iron core of a high-voltage DC relay of the present invention adopts the middle part of the polished rod of the lower section of the push rod 1 to fit in the through hole 21 of the moving iron core 2 and is made of metal materials. The sleeve 3 is used as a stop member for limiting the downward movement of the movable iron core 2 relative to the push rod 1, and in the lower section of the push rod 1, at a position corresponding to the outside of the first groove 22, a radial A recessed portion 12 recessed inward; in the inner wall of the sleeve 3, corresponding to the position of the recessed portion 12 of the push rod 1, there is also a protruding portion 31; the sleeve 3 and the push rod 1 are riveted or cold extrusion process, so that the protrusion 31 of the sleeve 3 is clamped into the depression 12 of the push rod 1 under the action of riveting or cold extrusion, and the expansion force after riveting or cold extrusion passes through the sleeve 3 itself Conduction, the top end of the sleeve 3 reacts to the moving iron core and pushes it tightly. The structure of the present utility model eliminates the threaded connection by using the polished rod for positioning, which can effectively solve the problem of the eccentricity of the thread, improve the gap between the tooth crest and the tooth bottom between the internal and external threads, and cannot effectively limit the rotation of the iron core in the X/Y direction. Problem; by using the sleeve stop to cancel the dispensing, it can not only avoid defects such as organic matter, cracking and foreign matter caused by dispensing, but also reduce the time required for dispensing and curing, thereby increasing the production speed.

Embodiment 2

Referring to FIGS. 9 to 14 , the connection structure between the push rod and the moving iron core of a high-voltage DC relay of the present invention is different from the first embodiment in that the bottom of the moving iron core 2 is also provided with the The third groove 24 is connected in the axial direction of the first groove 22, and the first groove 22 is relatively small, the third groove 24 is relatively large, the first groove 22 is inward, and the third groove 24 is relatively large. The bottom end of the lower section of the push rod 1 is completely accommodated in the third groove 24 . With this structure of the present invention, the recessed portion 12 of the push rod 1 can be made relatively longer in the axial direction, which makes the cooperation between the sleeve 3 and the push rod 1 easier. Fully accommodated in the third groove 24, the bottom end surface of the movable iron core 2 is flat.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or be modified to be equivalent, etc. effective embodiment. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention should fall within the protection scope of the technical solutions of the present invention.

Claims (11)

1. A connecting structure of a push rod and a movable iron core of a high-voltage direct-current relay comprises the push rod, the movable iron core and a sleeve made of metal materials; a downward step is arranged at the upper position of the lower section of the push rod, and the step of the push rod is abutted against the movable iron core; the movable iron core is provided with a through hole penetrating from top to bottom; the method is characterized in that: the polish rod at the middle part of the lower section of the push rod is matched in the through hole of the movable iron core; a first groove with a downward opening is formed in the position, corresponding to the through hole, of the bottom of the movable iron core; the sleeve is sleeved outside the push rod, part of the sleeve extends into the first groove, and the top end of the sleeve abuts against the groove bottom of the first groove; a concave part which is inwards concave along the radial direction is also arranged in the lower section of the push rod and at the position corresponding to the outside of the first groove; a convex part is arranged in the inner wall of the sleeve at the position corresponding to the concave part of the push rod; the sleeve and the push rod are riveted or cold extruded, so that the protruding part of the sleeve is clamped into the recessed part of the push rod under the action of riveting or cold extrusion, the expansion force is transmitted through the sleeve by self after riveting or cold extrusion, and the top end of the sleeve reacts on the movable iron core to tightly push the movable iron core.

2. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 1, characterized in that: the inner wall of the sleeve is in clearance fit with the outer wall of the push rod.

3. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 1 or 2, wherein: the concave part of the push rod is an annular groove arranged on the peripheral wall of the push rod, and the convex part of the inner wall of the sleeve is an annular convex strip corresponding to the matching.

4. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay as claimed in claim 3, wherein: the annular grooves of the push rod are one or a plurality of grooves arranged at intervals, and the annular bulges on the inner wall of the sleeve are also one or a plurality of grooves arranged at intervals.

5. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 1 or 2, wherein: the depressed part of catch bar is for encircleing the annular knurl structure on the periphery wall of catch bar, the bulge of telescopic inner wall is for corresponding the annular knurl shape that matches.

6. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 5, characterized in that: the annular convex part of the inner wall of the sleeve is also one corresponding strip or a plurality of strips arranged at intervals.

7. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay as claimed in claim 1, wherein: a first recessed channel is formed in the outer wall of the sleeve at a position corresponding to the protruding portion.

8. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 7, characterized in that: the convex part of the inner wall of the sleeve is formed by striking the first concave channel on the outer wall of the sleeve.

9. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 7, characterized in that: and an annular second concave channel is also arranged in the outer wall of the sleeve at a position close to the top.

10. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 1, characterized in that: a second groove with an upward opening is formed in the position, corresponding to the through hole, of the upper part of the movable iron core; the step of the push rod is abutted to the groove bottom of the second groove of the movable iron core.

11. The connecting structure of the push rod and the movable iron core of the high-voltage direct-current relay according to claim 1, characterized in that: the bottom of the movable iron core is also provided with a third groove communicated with the axial direction of the first groove, the first groove is relatively small, the third groove is relatively large, the first groove is close to the inside, and the third groove is close to the outside; the bottom end of the lower section of the push rod is completely received in the third recess.

Images