CN213752553U - U-shaped spring fixing sheet and balance force type relay with same - Google Patents

Abstract

The utility model relates to a U-shaped spring stationary blade for U-shaped spring in the balanced power formula relay of fixed connection, U-shaped spring stationary blade with connect pin welded fastening, have on the U-shaped spring stationary blade with connect pin matched with locating hole, the U-shaped spring stationary blade passes through the locating hole suit is in connect on the pin, the locating hole edge with it is fixed through laser welding to connect the pin. The utility model provides a U-shaped spring stationary blade can rely on frock positioning equipment and welding in batches, can avoid the welding to melt the influence of degree of depth to U-shaped spring stationary blade position precision, is favorable to realizing the automation of U-shaped spring stationary blade assembly, is showing improvement assembly efficiency.

Description

U-shaped spring fixing sheet and balance force type relay with same

Technical Field

The utility model relates to a balanced force formula relay field especially relates to the improvement of wherein U-shaped spring stationary blade.

Background

The balance force type sealing relay has excellent environmental mechanical resistance due to the fact that the same armature holding force and contact pressure are achieved in the excitation state and the de-excitation state, and is widely applied to the aerospace field.

The structure of the existing balance force type sealing relay is shown in figure 1 in a patent with publication number CN201319355Y, because an armature structure on a magnetic circuit system is a seesaw type structure rotating around a shaft, a connection pin on a contact system and a movable spring on the armature structure are generally connected by a U-shaped spring to realize soft connection, and under the condition of ensuring good contact, the armature component cannot be obviously hindered in the rotating process.

The U-shaped spring is connected through the U-shaped spring stationary blade with connecing the pin, the structure of current U-shaped spring stationary blade is shown in figure 2 of the patent that bulletin number is CN201319355Y, have the termination groove (draw-in groove) that is used for fixed U-shaped spring on the U-shaped spring stationary blade and be used for the welding to connect the turn-ups of pin, this kind of U-shaped spring stationary blade is because the structural constraint of itself, do not have location structure, can't utilize assembly fixture to fix a position the U-shaped spring stationary blade fast on connecing the pin, so this kind of current U-shaped spring stationary blade adopts the mode of spot welding to assemble usually, as shown in figure 8 of the utility model, U-shaped spring stationary blade 82 is including welding turn-ups 821, this welding turn-ups 821 with connect pin 81 to pass through the spot welding effect welding of upper electrode 91 with lower electrode 92. In the spot welding process, because the space between the U-shaped spring fixing pieces among the multiple groups of relays is small, the arrangement is tight, the assembly process can only adopt the mode of placing one welding, and the assembly efficiency is low. Meanwhile, after spot welding is finished, the welding strength of the U-shaped spring fixing piece is not judged well in appearance, and the welding strength can be guaranteed only by adopting a first destructive test and process parameter control.

In addition, because the U-shaped spring plays a current-carrying role in the balanced force relay and moves along with the armature, the U-shaped spring is a key part of the relay, the U-shaped spring and the rivet are not interfered with each other under the suction and release states of the armature, and a relay product has a high requirement on the position precision of the clamping groove of the U-shaped spring fixing piece, but in the prior art, because the U-shaped spring fixing piece does not have a positioning structure, the position size of the clamping groove in the assembling direction cannot be directly positioned and ensured by a tool, and the position of the clamping groove of the U-shaped spring fixing piece can be determined only after the welding is completed, obviously, and only the mode of positioning the U-shaped spring fixing piece by welding (for example, the flanging and the pin spot welding are adopted), so that the position size of the clamping groove of the U-shaped spring fixing piece in the assembling direction is influenced by a plurality of factors: if connect the position of pin, the precision of U-shaped spring stationary blade self, the welding depth of melting of U-shaped spring stationary blade, wherein connect pin position, the difficult control of U-shaped spring stationary blade welding depth in production process, easily cause the draw-in groove of U-shaped spring stationary blade can't satisfy the product requirement at the position size of assembly direction, the product easily leads to U-shaped spring and rivet to interfere because of the U-shaped spring stationary blade welding size is bad, the withstand voltage breakdown scheduling problem of U-shaped spring and pin.

SUMMERY OF THE UTILITY MODEL

Therefore, to the above problem, the utility model provides a U-shaped spring stationary blade of configuration optimization and have this U-shaped spring stationary blade's balance force formula relay.

The utility model discloses a following technical scheme realizes:

the utility model provides a U-shaped spring stationary blade, U-shaped spring stationary blade and connection pin welded fastening for the U-shaped spring in the balanced power formula relay of fixed connection, have on the U-shaped spring stationary blade with connect pin matched with locating hole, the U-shaped spring stationary blade passes through the locating hole suit is in connect on the pin, the locating hole edge with it is fixed through laser welding to connect the pin.

Wherein, based on installation considerations, in one embodiment, the positioning holes and the connecting pins are pre-positioned by clearance fit.

In one embodiment, the fit clearance between the positioning hole and the connecting pin is 0mm to 0.3mm in consideration of installation.

Based on manufacturing and cost considerations, in one embodiment, the whole main body of the U-shaped spring fixing piece is approximately of a sheet structure and comprises a sheet main body, the middle of the main body is provided with the positioning hole, and two sides of the positioning hole are provided with clamping grooves for clamping the U-shaped spring.

In order to reduce the appearance of the part and provide more assembling space of the U-shaped spring, the appearance of the main body is roughly in a diamond shape.

In order to improve the stress stability of the U-shaped spring fixing piece in the motion process of the armature, in one embodiment, the connecting line of the clamping grooves on two sides of the positioning hole passes through the center of the positioning hole.

Based on foretell U-shaped spring stationary blade, the utility model discloses still provide a balance force formula relay, balance force formula relay has included magnetic circuit, contact system and the U-shaped spring of connecting magnetic circuit and contact system, and contact system is including connecing the pin and welding the U-shaped spring stationary blade on connecing the pin, on the one end fixed mounting U-shaped spring stationary blade of U-shaped spring, the other end contacts with magnetic circuit's movable contact spring, U-shaped spring stationary blade be as above the U-shaped spring stationary blade.

The utility model discloses following beneficial effect has: the locating hole structure has been seted up on the U-shaped spring stationary blade in this embodiment, can fix a position on connecing the pin fast, and U-shaped spring stationary blade simple structure itself is whole flaky structure, easily makes, and its assembly fixture also easily designs, and before the welding, multiunit U-shaped spring stationary blade can rely on frock location equipment in batches, and the back is accomplished in the location, also can carry out batch welding, improves work efficiency, guarantees the position precision of draw-in groove. Meanwhile, the U-shaped spring fixing piece can be fixed with the lead connecting pin through laser welding through the positioning hole, and the influence of welding penetration on the position precision of the U-shaped spring fixing piece can be avoided. In general, the automatic assembly device is beneficial to realizing the automation of the assembly of the U-shaped spring fixing piece, and the assembly efficiency is obviously improved.

Drawings

FIG. 1 is a schematic diagram of a balancing force type relay in one embodiment;

FIG. 2 is a schematic diagram of a balance force type relay in an embodiment (the second is that a part of a bracket is hidden for facilitating the observation of a movable spring and a supporting sheet);

fig. 3 is a schematic diagram of a balanced force relay in an embodiment (third, separating the magnetic circuit, contact system 2 and U-spring);

FIG. 4 is a schematic view of a U-shaped spring fixing plate in the embodiment;

FIG. 5 is an assembly view of the contact system, U-spring retainer plate and U-spring mounted together in an embodiment;

FIG. 6 is an exploded view of the contact system, U-spring retention tab and U-spring configuration of the embodiment;

FIG. 7 is a schematic view showing the U-shaped spring fixing plate of the embodiment being welded to the terminal pin in a sleeving manner;

fig. 8 is a schematic view of a U-shaped spring fixing plate of the prior art welded to a pin by spot welding.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 3, as a preferred embodiment of the present invention, a balance force type relay is provided, which includes a magnetic circuit system 1, a contact system 2, and a U-shaped spring 3 connecting the magnetic circuit system 1 and the contact system 2. The armature iron on the magnetic circuit system 1 is a seesaw type structure rotating around a shaft, and the bottom of a movable spring 10 on the armature iron is provided with a supporting sheet 11 contacted with the U-shaped spring 3. A U-shaped spring fixing plate 21 for fixing the U-shaped spring 3 is welded to the terminal pin 22 of the contact system 2. It should be noted that the magnetic circuit system 1 and the contact system 2 shown in the present embodiment are only an example, and are not limited thereto, and they may be replaced with other magnetic circuit systems and contact systems in the prior art.

The U-shaped spring fixing plate 21 of the present embodiment is different from the prior art, and specifically, referring to fig. 4-7, the U-shaped spring fixing plate 21 is a plate structure with a through hole at the middle, and includes a main body 210, the main body 210 has a positioning hole 211 at the middle, the positioning hole 211 is a shape approximately matching the shape of the connecting pin 22, and in the matching relationship, the positioning hole 211 and the connecting pin 22 are in clearance fit for pre-positioning, and the fit clearance is verified to be optimally 0 mm-0.3 mm, so that the U-shaped spring fixing plate 21 can be sleeved on the connecting pin 22 through the positioning hole 211 to complete positioning during assembly. Clamping grooves 212 used for clamping the U-shaped spring 3 are formed in two sides of the positioning hole 211, and the connecting line of the clamping grooves 212 in the two sides passes through the circle center of the positioning hole 211, so that the stress stability of the U-shaped spring fixing piece 21 in the motion process of the armature is improved. In this embodiment, the locking grooves 212 are formed on both sides of the positioning hole 211, but in other embodiments, the locking grooves 212 may be selectively formed on other positions of the main body 210 according to the position and shape of the U-shaped spring 3, as long as the positioning hole 211 is not affected. In addition, in the present embodiment, the main body 210 has a diamond shape, which is used to reduce the profile of the part and provide the largest possible assembly space for the U-shaped spring.

The U-shaped spring fixing piece 21 in the embodiment is simple in structure, is of a whole sheet structure, is easy to manufacture, is easy to design in assembly tooling, can be assembled in batch by relying on the tooling for positioning before welding, can be welded in batch after positioning is completed, is favorable for realizing the automation of U-shaped spring fixing piece assembly, obviously improves the assembly efficiency, and ensures the position accuracy of the clamping groove 212. Meanwhile, because the U-shaped spring fixing plate 21 has been pre-positioned, other welding methods which have less influence on the position accuracy of the clamping groove 212 can be adopted, for example, the U-shaped spring fixing plate 21 and the lead connecting pin 22 in the embodiment are fixed at the edge of the positioning hole 211 by laser welding, compared with the prior art, the U-shaped spring fixing plate is flanged and welded by using the spot welding process, if the U-shaped spring fixing plate in the structure adopts the laser welding process, glass melting is easily caused and the sealing performance of the relay is influenced, in the embodiment, the U-shaped spring fixing plate 21 is sleeved on the lead connecting pin 22 by the positioning hole 211, when the laser welding is carried out at the edge of the positioning hole 211, two to three welding spots can be selected for non-surrounding welding to avoid the glass melting condition, and more importantly, after the U-shaped spring fixing plate 21 and the lead connecting pin 22 are fixed at the edge of the positioning hole 211 by the laser welding, the influence of the weld penetration of spot welding in the conventional technique on the positional accuracy of the U-shaped spring fixing piece 21 can be avoided. Therefore, the U-shaped spring fixing piece of the embodiment is more suitable for realizing batch automatic production in the balance force type relay through the structural improvement.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. The utility model provides a U-shaped spring stationary blade for the U-shaped spring in the fixed connection balanced force formula relay, U-shaped spring stationary blade with connect pin welded fastening, its characterized in that: the U-shaped spring fixing piece is provided with a positioning hole matched with the pin, the U-shaped spring fixing piece is sleeved on the pin through the positioning hole, and the edge of the positioning hole is fixed with the pin through laser welding.

2. A U-shaped spring fixing plate as set forth in claim 1, wherein: the positioning holes are in clearance fit with the connecting pins.

3. A U-shaped spring fixing plate as set forth in claim 2, wherein: the fit clearance between the positioning hole and the pin is 0-0.3 mm.

4. A U-shaped spring fixing plate as set forth in claim 1, wherein: the U-shaped spring fixing piece is of a generally flaky structure and comprises a flaky main body, the positioning hole is formed in the middle of the main body, and clamping grooves used for clamping the U-shaped spring are formed in two sides of the positioning hole.

5. A U-shaped spring fixing plate as set forth in claim 4, wherein: the body is substantially diamond shaped in shape.

6. A U-shaped spring fixing plate as set forth in claim 4, wherein: the connecting line of the clamping grooves on the two sides of the positioning hole passes through the circle center of the positioning hole.

7. The utility model provides a balance force formula relay, has included magnetic circuit, contact system and the U-shaped spring of connecting magnetic circuit and contact system, and contact system is including connecing the pin and the welding connect the U-shaped spring stationary blade on the pin, on the one end fixed mounting U-shaped spring stationary blade of U-shaped spring, the other end and magnetic circuit's movable contact spring, its characterized in that: the U-shaped spring fixing plate according to any one of claims 1 to 6.

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