CN221125824U - Relay with noise reduction spring - Google Patents

Abstract

The utility model discloses a relay with noise reduction springs, comprising: a fixing member; the push rod assembly is arranged on the fixing part in a penetrating manner and can move relative to the fixing part along the length direction of the push rod assembly, and comprises a push rod and a reset spring sleeved outside the push rod; the movable iron core is sleeved on the pushing rod and can be attracted with or separated from the fixed component under the driving of the pushing rod; the noise reduction spring is wound outside the push rod assembly, and two ends of the noise reduction spring are respectively used for propping against the fixed component and the movable iron core, so that collision noise between the movable iron core and the fixed component is reduced when the movable iron core and the fixed component are attracted. According to the relay with the noise reduction spring, the noise reduction spring is sleeved outside the push rod assembly, so that the noise reduction spring can have a buffering effect, and noise generated by rapid collision between the movable iron core and the fixed component is avoided.

Description

Relay with noise reduction spring

Technical Field

The utility model relates to the technical field of relays, in particular to a relay with a noise reduction spring.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is commonly used in automatic control circuits, and is an "automatic switch" that uses a smaller current to control a larger current. Along with the development of new energy industry, the high-voltage direct-current relay is widely applied to the fields of new energy automobiles, charging piles, photovoltaic power generation, energy storage systems and the like.

In high-voltage direct current relay, including coil, push rod subassembly, barrel, movable iron core, fixed part and contact structure, fixed part can be for fixed iron core or yoke panel coil around locating outside the barrel, movable iron core installs on push rod subassembly, when the coil circular telegram, fixed iron core or yoke panel produce electromagnetic force to movable iron core to make movable iron core to fixed iron core or yoke panel's direction motion, movable contact and stationary contact in the contact structure are closed simultaneously, but movable iron core will have the noise production when inhaling mutually with fixed iron core or yoke panel, can not satisfy the demand of part customer group to low noise product.

Disclosure of utility model

To solve at least one of the problems in the prior art described above, according to one aspect of the present utility model, there is provided a relay having a noise reduction spring, comprising: a fixing member; the push rod assembly is arranged on the fixing part in a penetrating manner and can move relative to the fixing part along the length direction of the push rod assembly, and comprises a push rod and a reset spring sleeved outside the push rod; the movable iron core is sleeved on the pushing rod and can be attracted with or separated from the fixed component under the driving of the pushing rod; the noise reduction spring is wound outside the push rod assembly, and two ends of the noise reduction spring are respectively used for propping against the fixed component and the movable iron core, so that collision noise between the movable iron core and the fixed component is reduced when the movable iron core and the fixed component are attracted.

In some embodiments, a first positioning groove and a first accommodating groove are formed in one end, facing the movable iron core, of the fixed component, the first positioning groove, the first accommodating groove and the pushing rod are coaxially arranged, and the diameter of the first positioning groove is larger than that of the first accommodating groove;

The movable iron core is provided with a second positioning groove and a second accommodating groove at one end facing the fixed component, the second positioning groove, the second accommodating groove and the pushing rod are coaxially arranged, and the diameter of the second positioning groove is larger than that of the second accommodating groove;

The two ends of the return spring are respectively accommodated in the first accommodating groove and the second accommodating groove, and the two ends of the noise reduction spring are respectively accommodated in the first positioning groove and the second positioning groove.

In some embodiments, when the fixed member and the movable core are in a separated state, one end of the noise reduction spring and a top wall of the first positioning groove or a bottom wall of the second positioning groove have a gap.

In some embodiments, the stationary component is a stationary core.

In some embodiments, the first receiving groove has a greater opening depth than the second receiving groove; the opening depth of the first positioning groove is larger than that of the second positioning groove.

In some embodiments, the cross-sectional area of the first positioning groove is 1/4-1/3 of the cross-sectional area of the fixed member and the cross-sectional area of the second positioning groove is 1/4-1/3 of the cross-sectional area of the movable core along a plane perpendicular to the length direction of the push rod assembly.

In some embodiments, the free end of the noise reduction spring is bent toward the center of the noise reduction spring.

In some embodiments, the spring rate of the noise reduction spring is greater than the spring rate of the return spring.

In some embodiments, the outer diameter of the noise reduction spring gradually decreases and then gradually increases from the movable iron core to the fixed core.

In some embodiments, the noise reduction spring is provided with a first plane and a second plane toward both ends of the fixed member and the movable core, respectively.

In summary, the relay with the noise reduction spring provided by the utility model has the following technical effects:

1) The mode that the noise-reducing spring is sleeved outside the push rod assembly is adopted, so that when the push rod drives the movable iron core to be attracted with the fixed component, the noise-reducing spring can be compressed, the noise-reducing spring can have a buffering effect, the noise generated by the rapid collision between the movable iron core and the fixed component is avoided, namely, the noise of the relay in the use process is reduced, and the requirement of a customer group on the low noise of a relay product is met;

2) The spring of making an uproar falls can also have the shock-resistant effect, and when receiving vibrations, the relay moves the iron core and still needs to compress the spring of making an uproar simultaneously, avoids moving the iron core and can carry out too much compression and produce vibrations to the spring that resets.

Drawings

Fig. 1 is a schematic structural view of a relay according to an embodiment of the present utility model;

FIG. 2 is a top view of the relay of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is a schematic cross-sectional view of a stationary core, a movable core, a pushrod assembly, and a noise reduction spring according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the noise reduction spring of FIG. 4;

Fig. 6 is a graph showing the magnitude of electromagnetic force between a fixed iron core and a moving magnet according to an embodiment of the present utility model as a function of the distance between the fixed iron core and the moving magnet.

The accompanying drawings:

100-relay with noise reduction spring, 10-fixed iron core, 11-first positioning groove, 12-first receiving groove, 20-push rod component, 21-push rod, 22-reset spring, 30-movable iron core, 31-second positioning groove, 32-second receiving groove, 40-noise reduction spring, 41-first end, 42-second end, 43-first plane, 44-second plane, 45-free end, 50-cylinder, 60-movable contact module, 70-stationary contact module, 80-coil, 90-ceramic cover, 200-yoke panel, 300-yoke frame.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

The utility model is described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 6, a relay 100 with a noise reduction spring according to an embodiment of the present utility model includes a fixing component 10, a push rod assembly 20, a movable iron core 30, and a noise reduction spring 40.

Referring to fig. 1 and fig. 4, the push rod assembly 20 is disposed through the fixing member 10, and is capable of moving along the length direction of the push rod assembly 20 relative to the fixing member 10, and includes a push rod 21 and a return spring 22 sleeved outside the push rod 21; the movable iron core 30 is sleeved on the push rod 21 and can be attracted to or separated from the fixed component 10 under the drive of the push rod 21; the noise reducing spring 40 is wound outside the push rod assembly 20, and two ends of the noise reducing spring are respectively used for propping against the fixed component 10 and the movable iron core 30, so that collision noise between the movable iron core 30 and the fixed component 10 is reduced when the movable iron core 30 and the fixed component 10 are attracted.

In the relay 100 with the noise reduction spring, the noise reduction spring 40 is sleeved outside the push rod assembly 20, so that when the push rod 21 drives the movable iron core 30 and the fixed component 10 to attract each other, the noise reduction spring 40 can be compressed, so that the noise reduction spring 40 can have a buffering effect, the noise generated by the rapid collision between the movable iron core 30 and the fixed component 10 is avoided, namely, the noise of the relay in the use process is reduced, and the requirement of a customer group on the low noise of a relay product is met; meanwhile, the noise reduction spring 40 can also have an anti-vibration effect, and when the relay is vibrated, the movable iron core 30 also needs to compress the noise reduction spring 40, so that the movable iron core 30 can compress the reset spring 22 too much to generate vibration.

The fixing member 10 of the present embodiment may be a fixed iron core or a yoke panel 200. Specifically, the present embodiment will be described taking a fixed iron core as an example.

It can be understood that the relay of the present embodiment further includes a cylinder 50, a movable contact module 60, a stationary contact module 70, a ceramic cover 90, a coil 80, a yoke 300, and other structures, where the movable iron core 30 and the fixed iron core 10 are housed in the cylinder 50, the coil 80 is wound outside the cylinder 50, and the movable contact module 60 is mounted on an end of the push rod 21 remote from the movable iron core 30. When the coil 80 is electrified, the fixed iron core 10 generates magnetic force to the movable iron core 30 to attract the movable iron core 30 to the direction of the fixed iron core 10, so that the two can be attracted, and meanwhile, the movable contact module 60 and the fixed contact module 70 are driven to be attracted; when the coil 80 is powered off, the attractive force between the fixed iron core 10 and the movable iron core 30 disappears, and the push rod assembly 20 drives the movable contact module 60 and the movable iron core 30 to return to the initial positions, at which time the movable iron core 30 and the fixed iron core 10 are separated.

Referring to fig. 3 and 4, in this embodiment, when the reset spring 22 and the noise reduction spring 40 are disposed between the fixed iron core 10 and the movable iron core 30, in order to facilitate the molding and installation of the whole relay, one end of the fixed iron core 10 facing the movable iron core 30 is provided with a first positioning slot 11 and a first receiving slot 12, the first positioning slot 11, the first receiving slot 12 and the push rod 21 are coaxially disposed, and the diameter of the first positioning slot 11 is larger than that of the first receiving slot 12; the movable iron core 30 is provided with a second positioning groove 31 and a second accommodating groove 32 at one end facing the fixed iron core 10, the second positioning groove 31, the second accommodating groove 32 and the pushing rod 21 are coaxially arranged, and the diameter of the second positioning groove 31 is larger than that of the second accommodating groove 32; wherein, two ends of the return spring 22 are respectively accommodated in the first accommodating groove 12 and the second accommodating groove 32, and two ends of the noise reduction spring 40 are respectively accommodated in the first positioning groove 11 and the second positioning groove 31, so that the first accommodating groove 12 and the first positioning groove 11 are convenient to open by coaxially arranging the first accommodating groove 12 groove provided with the return spring 22 and the first positioning groove 11 provided with the noise reduction spring 40 on the fixed iron core 10, for example, when the first positioning groove 11 is opened, the first accommodating groove 12 can be continuously opened in the direction of the fixed iron core 10 towards one end of the movable iron core 30, so that the first accommodating groove 12 and the first positioning groove 11 can be formed quickly, and the structure of the fixed iron core 10 is simpler; meanwhile, by coaxially arranging the second accommodating groove 32 provided with the noise reduction spring 40 and the second positioning groove 31 provided with the noise reduction spring 40 on the movable iron core 30, the second accommodating groove 32 and the second positioning groove 31 are conveniently opened, for example, after the second accommodating groove 32 is opened, the second positioning groove 31 is continuously opened on the movable iron core 30 towards one end of the fixed iron core 10, so that the second accommodating groove 32 and the second positioning groove 31 can be conveniently and rapidly molded, and the structure of the movable iron core 30 is simpler.

When the noise reduction spring 40 is disposed in the first positioning groove 11 and the second positioning groove 31, in order to avoid the influence of the disposition of the noise reduction spring 40 on the attraction between the movable core 30 and the fixed core 10, when the fixed core 10 and the movable core 30 are in a separated state, one end of the noise reduction spring 40 and the top wall of the first positioning groove 11 or the bottom wall of the second positioning groove 31 have a gap. For convenience of description, the end of the noise reducing spring 40 is defined as a first end 41, the end of the noise reducing spring 40 is defined as a second end 42, that is, when the noise reducing spring 40 is set, the first end 41 of the noise reducing spring 40 and the top wall of the first positioning groove 11 can be set to be in a connected state, or the second end 42 of the noise reducing spring 40 and the bottom wall of the second positioning groove 31 are set to be in a connected state, and meanwhile, the first end 41 of the noise reducing spring 40 and the top wall of the first positioning groove 11 are set to be in a gap, so that in the gradual attraction and contact process of the movable iron core 30 and the fixed iron core 10, the movable iron core 30 compresses the reset spring 22 first, and then the first end 41 and the second end 42 of the noise reducing spring 40 are all in contact with the fixed iron core 10 and the movable iron core 30, and then the noise reducing spring 40 is compressed, and the noise reducing spring 40 can be normally attracted and contracted by the iron core 10, and the noise reducing spring 40 can not normally attracted and contracted by the movable iron core 10 when the movable iron core 10 is normally attracted and contracted by the fixed iron core 10.

Wherein, when the accommodating groove and the positioning groove are opened, the opening depth of the first accommodating groove 12 is larger than the opening depth of the second accommodating groove 32; the first positioning groove 11 has a depth greater than that of the second positioning groove 31, so that the length of the reset spring 22 contained in the fixed iron core 10 is greater than that of the reset spring contained in the movable iron core 30, and the situation that the movable iron core 30 is vibrated in the moving process of the relay to excessively drive the reset spring 22 to shake is avoided, and meanwhile, the situation that the movable iron core 30 is vibrated in the moving process of the relay to excessively shake the noise reduction spring 40 is avoided.

In addition, when the first positioning groove 11 and the second positioning groove 31 are opened, in order not to affect the attraction contact area between the movable iron core 30 and the fixed iron core 10, the attraction force between the two is ensured, the cross section area of the first positioning groove 11 is 1/4-1/3 of the cross section area of the fixed iron core 10 along the plane perpendicular to the length direction of the push rod assembly 20, and the cross section area of the second positioning groove 31 is 1/4-1/3 of the cross section area of the movable iron core 30, so that the sufficient contact area between the fixed iron core 10 and the movable iron core 30 can be ensured, the sufficient magnetic field transmission can be ensured, and the attraction force between the two is ensured.

Further, since the electromagnetic attraction force between the movable iron core 30 and the fixed iron core 10 is increased rapidly in an exponential manner along with the closer distance between the movable iron core 30 and the fixed iron core 10 in the attraction process, for example, as shown in fig. 6, in order to fully utilize the characteristic of the electromagnetic force variation trend between the fixed iron core 10 and the movable iron core 30, when the noise reduction spring 40 is arranged, the elastic coefficient of the noise reduction spring 40 is larger than that of the reset spring 22, so that when the movable iron core 30 moves towards the fixed iron core 10, the electromagnetic force between the movable iron core 30 is increased rapidly, and the noise reduction spring 40 can be compressed at the moment, so that the effect of fully utilizing the characteristic of the electromagnetic force variation trend between the movable iron core 30 and the fixed iron core 10 can be achieved, and the noise reduction spring 40 with a larger elastic coefficient can be arranged, so that the effect of reducing the contact noise between the movable iron core 30 and the fixed iron core 10 can be achieved, and the anti-vibration effect can be achieved.

In addition, since the noise reduction spring 40 has a certain length along the length direction of the push rod 21, and thus has a certain bending degree of freedom, in order to prevent the movable iron core 30 from moving in the direction of the fixed iron core 10 and compressing the noise reduction spring 40, the closing between the movable iron core 30 and the fixed iron core 10 is affected by the bending and twisting of the noise reduction spring 40, the outer diameter of the noise reduction spring 40 is gradually reduced and then gradually increased in the direction of the fixed iron core 10, that is, the outer diameter of the noise reduction spring 40 is the largest at both ends, smallest in the middle, gradually reduced in the direction from one end to the middle, and gradually increased in the direction from the middle to the other end, so that when the movable iron core 30 compresses the noise reduction spring 40, the middle position of the noise reduction spring 40 is prevented from bending and deforming to touch the groove wall of the first positioning groove 11 or the second positioning groove 31 to affect the attraction between the movable iron core 30 and the fixed iron core 10.

Referring to fig. 5, in one embodiment of the present utility model, since two ends of the noise reducing spring 40 have two free ends, and the noise reducing spring 40 and the top wall of the first positioning slot 11 or the bottom wall of the second positioning slot 31 have a gap, in order to avoid scraping the top wall of the first positioning slot 11 or the bottom wall of the second positioning slot 31 when the noise reducing spring 40 contacts with the top wall of the first positioning slot 11 or the bottom wall of the second positioning slot 31 in a propping manner, the free ends 45 of the noise reducing spring 40 are bent towards the center of the noise reducing spring 40, so that the contact between the two free ends 45 of the noise reducing spring 40 and the fixed iron core 10 and the movable iron core 30 is avoided from scraping to generate scraps, that is, the generation of scraps is avoided from affecting the normal use of the relay.

In addition, since the two ends of the noise reduction spring 40 need to abut against the top wall of the first positioning groove 11 and the bottom wall of the second positioning groove 31 respectively, the top wall of the first positioning groove 11 and the bottom wall of the second positioning groove 31 are in a planar state, in this embodiment, the noise reduction spring 40 is set to have the first plane 43 and the second plane 44 towards the two ends of the fixed iron core 10 and the movable iron core 30 respectively, so that when the two ends of the noise reduction spring 40 abut against the fixed iron core 10 and the movable iron core 30 respectively, the two ends of the noise reduction spring 40 abut against the planar positions, so that a certain contact area exists between the noise reduction spring 40 and the fixed iron core 10 and the movable iron core 30 respectively, and the stability of the movable iron core 30 compressing the noise reduction spring 40 is ensured.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. Relay with spring of making an uproar falls, its characterized in that includes:

A fixing member (10);

The push rod assembly (20) is arranged on the fixed part (10) in a penetrating manner, can move relative to the fixed part (10) along the length direction of the push rod assembly (20), and comprises a push rod (21) and a reset spring (22) sleeved outside the push rod (21);

The movable iron core (30) is sleeved on the pushing rod (21) and can be attracted to or separated from the fixed component (10) under the driving of the pushing rod (21);

The noise reduction spring (40) is wound outside the push rod assembly (20), two ends of the noise reduction spring are respectively used for propping against the fixed component (10) and the movable iron core (30), and the noise reduction spring is used for reducing collision noise between the movable iron core (30) and the fixed component (10) when the movable iron core (30) and the fixed component (10) are attracted.

2. The relay with noise reduction spring according to claim 1,

A first positioning groove (11) and a first accommodating groove (12) are formed in one end, facing the movable iron core (30), of the fixed component (10), the first positioning groove (11), the first accommodating groove (12) and the pushing rod (21) are coaxially arranged, and the diameter of the first positioning groove (11) is larger than that of the first accommodating groove (12);

a second positioning groove (31) and a second accommodating groove (32) are formed in one end, facing the fixed component (10), of the movable iron core (30), the second positioning groove (31), the second accommodating groove (32) and the pushing rod (21) are coaxially arranged, and the diameter of the second positioning groove (31) is larger than that of the second accommodating groove (32);

The two ends of the return spring (22) are respectively accommodated in the first accommodating groove (12) and the second accommodating groove (32), and the two ends of the noise reduction spring (40) are respectively accommodated in the first positioning groove (11) and the second positioning groove (31).

3. Relay with noise reduction spring according to claim 2, characterized in that one end of the noise reduction spring (40) and the top wall of the first positioning groove (11) or the bottom wall of the second positioning groove (31) have a gap when the fixed part (10) and the movable core (30) are in a separated state.

4. A relay with a noise reducing spring according to claim 2 or 3, characterized in that the fixing element (10) is a fixed iron core.

5. The relay with the noise reduction spring according to claim 4, wherein the opening depth of the first receiving groove (12) is larger than the opening depth of the second receiving groove (32); the opening depth of the first positioning groove (11) is larger than the opening depth of the second positioning groove (31).

6. The relay with the noise reduction spring according to claim 4, wherein the sectional area of the first positioning groove (11) is 1/4-1/3 of the sectional area of the fixed iron core and the sectional area of the second positioning groove (31) is 1/4-1/3 of the sectional area of the movable iron core (30) along a plane perpendicular to the length direction of the push rod assembly (20).

7. A relay with a noise reduction spring according to any of claims 1-3, characterized in that the free end (45) of the noise reduction spring (40) is bent in the direction of the centre of the noise reduction spring (40).

8. A relay with a noise reduction spring according to any of claims 1-3, characterized in that the spring coefficient of the noise reduction spring (40) is larger than the spring coefficient of the return spring (22).

9. A relay with a noise reduction spring according to any of claims 1-3, characterized in that the outer diameter of the noise reduction spring (40) decreases gradually from the moving core (30) towards the stationary part (10) and then increases gradually.

10. A relay with a noise reduction spring according to any of claims 1-3, characterized in that the noise reduction spring (40) is provided with a first plane (43) and a second plane (44) towards both ends of the fixed part (10) and the moving core (30), respectively.