CN220821338U - Locking device and contactor - Google Patents

Abstract

The present disclosure proposes a locker, comprising: a support plate; a holding portion fixed with respect to the support plate; a suction plate located between the support plate and the holding portion, one end of the suction plate being pivotally connected to the support plate, the suction plate including a latch portion configured to abut the holding portion; a coil mounted on the support plate between the suction plate and the support plate, the coil being capable of generating a suction force to the suction plate that pivots the suction plate toward the coil when the coil has a voltage, the voltage being positively correlated with the suction force; a retaining spring located between the suction plate and the support plate and extending in a direction perpendicular to the pivot axis, both ends of the retaining spring respectively cooperating with the suction plate and the support plate, and the retaining spring being compressively biased to hold the latch portion against the retaining portion; and the adjusting device can adjust the length of the retaining spring.

Description

Locking device and contactor

Technical Field

The present disclosure relates to the electrical field, and in particular to a locking device and a contactor including the locking device.

Background technique

The contactor products currently on the market use a trip lock device to achieve the locking of the closed switch and the tripping of the open switch. In actual applications, due to processing and assembly errors and the friction between moving parts, the closing holding energy changes, which in turn causes the opening coil to not operate under low voltage.

If the contactors on the market currently fail to operate under low voltage, they generally reduce the closing holding contact amount or replace the entire locking component to ensure that the opening coil can trip reliably in a low voltage environment. However, in actual applications, reducing the closing holding contact amount increases the risk of mis-tripping; replacing the entire component is time-consuming and has a high scrap rate.

Therefore, a new locking device is needed to solve the problem that the contactor does not operate when the opening coil is at a low voltage and to avoid the problem of erroneous opening caused by adjusting the locking amount.

Utility Model Content

The purpose of the present disclosure is to at least solve the shortcomings existing in the prior art. The present disclosure proposes a locking device, characterized in that it includes: a support plate; a holding portion fixed relative to the support plate; an engagement plate located between the support plate and the holding portion, one end of the engagement plate is pivotally connected to the support plate so that the engagement plate can pivot relative to the support plate around a pivot axis, the engagement plate includes a locking portion configured to abut against the holding portion; a coil mounted on the support plate and located between the engagement plate and the support plate, when the coil has a voltage, it can generate a suction force on the engagement plate to pivot the engagement plate toward the coil, the voltage being positively correlated with the suction force; a holding spring located between the engagement plate and the support plate and extending in a direction perpendicular to the pivot axis, the two ends of the holding spring respectively cooperate with the engagement plate and the support plate, and the holding spring is compressed and biased to hold the locking portion against the holding portion; an adjusting device, the adjusting device being able to adjust the length of the holding spring.

According to some embodiments of the present disclosure, the adjusting device includes a rod-shaped member having a threaded section and an extension section, the extension section extending into the interior of the retaining spring, the rod-shaped member also including a resting section located between the threaded section and the extension section, one end of the retaining spring rests against the resting section, and the other end rests against the suction plate, the threaded section is threadedly connected to the support plate, so that when the locking portion abuts against the retaining portion, the distance between the resting section and the suction plate can be adjusted.

According to some embodiments of the present disclosure, the adjustment device further includes a fastener, which is threadably matched with the threaded segment to be fastened against a side of the support plate away from the retaining spring.

According to some embodiments of the present disclosure, the support plate also includes a fixing sleeve, which has a fixing sleeve body and a through hole with an internal thread passing through the fixing sleeve body, and the fixing sleeve also has a flange protruding from the fixing sleeve body perpendicular to the extension direction of the through hole at one end in the extension direction of the through hole, and the support plate includes an opening allowing the fixing sleeve body to pass through, and the size of the opening is smaller than the maximum outer size of the flange.

According to some embodiments of the present disclosure, the retaining portion is a roller.

According to some embodiments of the present disclosure, the locking portion includes a first locking surface and a second locking surface that are angled with each other, and when the suction plate is buckled with the retaining portion, both the first locking surface and the second locking surface abut against the retaining portion.

According to some embodiments of the present disclosure, the support plate has a first section and a second section that are angled with each other, the suction plate is pivotally connected to the first section and is opposite to the second section, and the coil and the spring are located between the suction plate and the second section.

According to some embodiments of the present disclosure, the first segment and the second segment are perpendicular to each other.

According to some embodiments of the present disclosure, the support plate further includes a rib perpendicular to the first segment and the second segment and connected to the first segment and the second segment.

In addition, the present disclosure also provides a contactor, comprising the locking device described in any one of the above embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective schematic diagram showing a locking device according to an embodiment of the present disclosure from a first viewing angle;

FIG2 is a perspective schematic diagram showing the locking device in FIG1 from a second viewing angle;

FIG3 is a perspective schematic diagram of a suction plate according to an embodiment of the present disclosure;

FIG. 4 shows a cross-sectional view of a locking device according to an embodiment of the present disclosure.

Reference numerals

1 support plate, 11 first section, 12 second section, 13 rib, 14 fixing sleeve, 15 pivot connection part, 2 suction plate, 21 locking part, 211 first locking surface, 212 second locking surface, 3 holding part, 4 coil, 5 holding spring,

6 adjusting device, 61 rod-shaped member, 611 threaded section, 612 abutting section, 613 extension section, 62 fastener

Detailed ways

In order to make the purpose, scheme and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same parts.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

FIG. 1 and FIG. 2 show the locking device according to the present disclosure from two different angles, wherein the locking device comprises a support plate 1 and a suction plate 2, wherein the suction plate 2 is pivotally connected to the support plate 1 so that the suction plate 2 can pivot relative to the support plate 1 around a pivot axis. For example, the pivot connection between the two is achieved through a pivot connection portion 15, as shown in FIG. 1, the pivot connection portion 15 is a pivot shaft, and both the support plate 1 and the suction plate 2 are provided with corresponding through holes for the pivot shaft to pass through, thereby achieving relative pivoting between the support plate 1 and the suction plate 2. Alternatively, the present disclosure may also select a pivot connection method such as a hinge that is easily conceivable by those skilled in the art.

The locking device according to the present disclosure also includes a retaining portion 3, which can be fixed relative to the support plate 1 and is arranged on the side of the suction plate 2 away from the support plate 1, so that the suction plate 2 can pivot between the support plate 1 and the retaining portion 3. In fact, the position of the retaining portion 3 relative to the support plate 1 can be adjustable, so that a suitable relative position can be selected according to actual application conditions and needs. At each selected relative position, the retaining portion 3 can be fixed relative to the support plate 1. When the suction plate 2 is pivoted to abut against the retaining portion 3, the contactor (not shown) is in a closed state, and when the suction plate 2 is pivoted to separate from the retaining portion 3, the contactor is in an open state.

In particular, the retaining portion 3 may be a roller to reduce friction during the process of buckling and releasing, thereby improving the stability of the buckling and releasing.

In addition, FIG3 shows a three-dimensional schematic diagram of the suction plate 2 according to the present disclosure, and the suction plate 2 may also include a locking portion 21 configured to abut against the retaining portion 2, and the locking portion 21 may include a first locking surface 211 and a second locking surface 212. Among them, the second locking surface 212 may be parallel to the extension plane of the main body of the suction plate 2. The first locking surface 211 and the second locking surface 212 may be arranged at an angle, for example, perpendicular to each other, and the first locking surface 211 is arranged away from the pivot axis of the suction plate 2. When the locking portion 21 is buckled with the retaining portion 3, as shown in FIG1, the first locking surface 211 and the second locking surface 212 both abut against the retaining portion 3, especially against the retaining portion 3 configured as a roller, which is conducive to making the buckling fit between the locking portion 21 and the retaining portion 3 more stable.

In order to maintain the stable closing state of the contactor, the locking device according to the present disclosure may also be provided with a retaining spring 5. The retaining spring 5 may be provided between the support plate 1 and the suction plate 2, and the extending direction of the retaining spring 5 is perpendicular to the pivot axis of the suction plate 2. The two ends of the retaining spring 5 are respectively matched with the support plate 1 and the suction plate 2, so that the elastic force of the retaining spring 5 can be directly or indirectly applied to the support plate 1 and the suction plate 2, respectively, so as to bias the suction plate 2 to maintain abutment and buckling with the retaining portion 3 by compressing and biasing the retaining spring 3.

Furthermore, in order to realize the opening function of the contactor, the locking device according to the present disclosure may be provided with an electromagnetic coil 4, and the suction plate 2 may be partially or completely made of metal. The suction force generated by the electromagnetic coil 4 on the suction plate 2 is positively correlated with the voltage on the electromagnetic coil 4, so that when the electromagnetic coil 4 is passed with a voltage exceeding a certain threshold, it is able to attract the suction plate 2, so that the suction plate 2 is disengaged from the retaining portion 3. Specifically, as shown in FIG1 , the electromagnetic coil 4 may be installed on the support plate 1 and located between the support plate 1 and the suction plate 2, and the electromagnetic coil 4 is opposite to the suction plate 4, so that when the electromagnetic coil 4 is passed with a voltage exceeding a certain threshold, the suction plate 2 is attracted to overcome the elastic force of the retaining spring 5 and pivot away from the retaining portion 3 to achieve disengagement.

Since the electromagnetic coil 4 and the retaining spring 5 may be arranged between the support plate 1 and the suction plate 2, a certain installation space is required between the support plate 1 and the suction plate 2. Therefore, the support plate 1 may be arranged to have a first section 11 and a second section 12, wherein the first section 11 is located between the second section 12 and the support plate 2, so as to increase the installation space and provide a compact space design. Specifically, the first section 11 and the second section 12 are arranged at an angle to each other, wherein the first section 11 is pivotally connected to the suction plate 2, and the second section 12 is opposite to the suction plate 2, and the electromagnetic coil 4 and the retaining spring 5 are both arranged between the second section 12 and the suction plate 2. Preferably, the first section 11 and the second section 12 are perpendicular to each other to optimize the space design, so that the structure is compact and the volume of the locking device is reduced.

In addition, the support plate 1 may also be provided with a rib 13, which is perpendicular to and connected to the first section 11 and the second section 12, so as to strengthen the strength of the support plate 11 and provide protection for the components installed between the support plate 1 and the suction plate 2.

As shown in FIG1 , according to an embodiment of the present disclosure, the locking device may further include an adjusting device 6, which can adjust the length of the above-mentioned holding spring 5, that is, adjust the compression bias of the holding spring 5, so as to change the voltage threshold corresponding to the electromagnetic coil 4 to achieve the attraction of the suction plate 2 for the tripping action. Thus, it is possible to achieve two-way adjustment by adjusting the adjusting device without changing the closing and holding contact amount of the locking device, so as to set the optimal compression bias of the holding spring 5, which can ensure the reliable tripping of the electromagnetic coil under low voltage, and avoid reducing the closing and holding contact amount and increasing the risk of mis-tripping.

According to an adjusting device 6 disclosed in the present invention, as shown in FIG4 , it may include a rod-shaped member 61, and the rod-shaped member 61 may include a threaded section 611, abutting section 612, and an extension section 613, wherein the abutting section 612 is located between the threaded section 611 and the extension section 613. The threaded section 611 is used to threadably cooperate with the support plate 1, and the extension section 613 penetrates into the retaining spring 5. The extension section 612 is larger than the adjacent threaded section 611 and the extension section 612 in the radial direction of the rod-shaped member 61, so that one end of the retaining spring 5 can abut against the extension section 612 in the axial direction of the rod-shaped member 61. The other end of the retaining spring 5 can cooperate with the suction plate 2 so as to directly or indirectly apply elastic force to the suction plate.

The end of the rod-shaped member 61, for example, close to the support plate 1, may be provided with features for rotation, such as an outer hexagonal periphery, an inner hexagonal hole or a plum blossom hole. By rotating the rod-shaped member 61, the relative mating position of the threads of the rod-shaped member 61 and the support plate 1 changes, so that the rod-shaped member 61 can be relatively displaced along the axial direction of the rod-shaped member 61 relative to the support plate 1, and then, when the suction plate 2 and the retaining portion 3 are in contact, the abutting section 612 is relatively displaced relative to the suction plate 2, so that the relative distance between the two ends of the retaining spring 5 respectively mating with the abutting section 612 and the suction plate 2 changes, thereby achieving a change in the compression bias of the retaining spring 5.

Preferably, the adjusting device 6 may further include a fastener 62, such as a nut, which may be threadedly matched with the threaded section 611 of the rod-shaped member 61 so as to be fastened against the side of the support plate 1 away from the retaining spring 4, as shown in Fig. 4. Thus, the selected adjustment position of the adjusting device 6 is protected, and the rod-shaped member 61 can be adjusted only when the fastener 62 is loosened, even when the fastener 62 is separated from the support plate 1.

Alternatively, the support plate 1 according to the present disclosure may further include a fixing sleeve 14, and a matching opening corresponding to the fixing sleeve 14 may be provided on the support plate 1. The fixing sleeve 14 has a fixing sleeve body and a through hole with an internal thread passing through the fixing sleeve body, and the through hole is used to be threadedly connected with the threaded segment 611. The fixing sleeve 14 also has a flange protruding from the fixing sleeve body perpendicular to the extension direction of the through hole at one end in the extension direction of the through hole with the internal thread, and the maximum size of the flange is larger than the size of the matching opening on the support plate 1, so that the matching opening allows the fixing sleeve body to pass through and the flange abuts against the side of the support plate 1 close to the retaining spring 5, thereby realizing the threaded connection between the rod-shaped member 61 and the support plate 1. This design makes it possible to reduce the thickness of a portion of the support plate 1 (for example, the portion other than the fixing sleeve 14), thereby reducing the manufacturing cost, volume and weight of the support plate 1.

In addition, as shown in Fig. 4, a corresponding through hole may be provided on the suction plate 2 for the extension section 613 to pass through, and the diameter of the through hole is smaller than the diameter of the end of the retaining spring 5 that cooperates with the suction plate 2, so as to ensure the stable cooperation, such as abutment or fixation, between the retaining spring 5 and the suction plate 2. The provision of the through hole is conducive to maintaining the extension direction of the retaining spring 5 in a straight line in a fixed direction, thereby facilitating stable elastic force and bias, and preventing the retaining spring 5 from being separated from the locking device.

According to the present disclosure, a contactor including any one of the above-mentioned locking devices is also proposed.

It should be understood that the above description is intended to illustrate rather than limit. For example, the above embodiments (and/or aspects thereof) can be used in combination with each other. In addition, without departing from the scope of the present disclosure, many modifications can be made to adapt specific situations or materials to the teachings of the present disclosure. The functions or performances of the various elements or modules described herein are only for illustration and are by no means restrictive, but are merely exemplary embodiments. After reading the above description, many other embodiments and modifications within the spirit and scope of the claims will be apparent to those skilled in the art. Therefore, the scope of the present disclosure should be determined with reference to the full scope of the equivalents given by the attached claims and these claims.

In the following claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” and “third,” etc. are used merely as labels and are not intended to impose numerical requirements on their objects.

Claims (10)

1. A locking device, characterized in that it comprises: Support plate, A holding portion, fixed relative to the support plate, The suction plate is located between the support plate and the holding portion, one end of the suction plate is pivotally connected to the support plate so that the suction plate can pivot relative to the support plate around a pivot axis, and the suction plate includes a locking portion configured to abut against the holding portion. The coil is mounted on the support plate and is located between the suction plate and the support plate. When the coil has a voltage, it can generate a suction force on the suction plate to make the suction plate pivot toward the coil. The voltage is positively correlated with the suction force. A retaining spring is located between the suction plate and the support plate and extends in a direction perpendicular to the pivot axis. Two ends of the retaining spring are respectively matched with the suction plate and the support plate, and the retaining spring is compressed and biased to hold the locking portion against the retaining portion. An adjusting device is provided, which is capable of adjusting the length of the retaining spring. 2. The locking device according to claim 1, characterized in that: The adjusting device includes a rod-shaped member having a threaded section and an extended section, the extended section extending into the interior of the retaining spring, the rod-shaped member also including a resting section located between the threaded section and the extended section, one end of the retaining spring rests against the resting section, and the other end rests against the suction plate, the threaded section is threadedly connected to the support plate, so that when the locking portion abuts against the retaining portion, the distance between the resting section and the suction plate can be adjusted. 3. The locking device according to claim 2, characterized in that: The adjustment device further comprises a fastener, which is threadably matched with the threaded section to be fastened against a side of the support plate away from the retaining spring. 4. The locking device according to claim 2, characterized in that: The support plate also includes a fixing sleeve, which has a fixing sleeve body and a through hole with an internal thread passing through the fixing sleeve body. The fixing sleeve also has a flange protruding from the fixing sleeve body perpendicular to the extension direction of the through hole at one end in the extension direction of the through hole. The support plate includes an opening allowing the fixing sleeve body to pass through, and the size of the opening is smaller than the maximum outer size of the flange. 5. The locking device according to any one of claims 1 to 4, characterized in that: The holding portion is a roller. 6. The locking device according to claim 5, characterized in that: The locking portion comprises a first locking surface and a second locking surface which are angled with each other. When the suction plate is buckled with the retaining portion, the first locking surface and the second locking surface both abut against the retaining portion. 7. The locking device according to any one of claims 1 to 4, characterized in that: The support plate has a first section and a second section which are angled with each other, the suction plate is pivotally connected to the first section and is opposite to the second section, and the coil and the spring are located between the suction plate and the second section. 8. The locking device according to claim 7, characterized in that: The first section and the second section are perpendicular to each other. 9. The locking device according to claim 7, characterized in that: The support plate further includes a rib perpendicular to and connected to the first segment and the second segment. 10. A contactor, characterized by comprising a locking device according to any one of claims 1 to 9.