CN206210716U - A kind of motor-driven two phase relay - Google Patents

Abstract

The utility model discloses a two-phase relay driven by a motor. The relay comprises: a turbine gear pair driven by a motor connected with a worm to drive a special-shaped gear, the special-shaped gear drives a connecting rod to drive a sliding bar, and the sliding bar drives a first movable contact Move with the second movable contact to realize contact or disconnection with the first static contact and the second static contact. The first moving reed group terminal clamping groove and the second movable reed group terminal clamping groove are located in the same level space as the special-shaped gear. The first beneficial effect of the utility model is that the worm gear transmission has good self-locking characteristics, which enhances the electrical life and arc resistance of the contacts, and is also conducive to the automatic production of relays, thereby reducing manufacturing costs and improving quality consistency . The second advantage is that the relay tends to be thinner, which reduces the size of the relay and optimizes the product structure; the third advantage is that two sets of contacts are designed for single-phase power supply, and the live wire and neutral wire are connected or disconnected at the same time , greatly increasing the safety of electricity use.

Description

A two-phase relay driven by a motor

technical field

The utility model relates to a relay, in particular to a two-phase relay used as a load switch in a single-phase smart meter and driven by a motor.

Background technique

The load switch is the key component of the smart meter to realize the function of charge control. In the prior art, the magnetic latching relay is mostly used as the load switch in the smart meter.

Due to the shortcomings of magnetic latching relays in terms of anti-constant magnetic field, contact resistance, contact pressure, anti-shock vibration, and arc wear, problems such as meter burning, power theft, malfunction, and unstable operation occur when smart meters are running. It happens from time to time. According to the State Grid Corporation of China's failure statistics on faulty smart meters, among smart meters using magnetic latching relays as load switches, the proportion of smart meter failures caused by load switch problems accounts for the highest proportion of all components.

In the prior art, there are relays driven by motors, and the single-phase relays can only be used to switch the live wire and not control the neutral wire.

Similarly, the three-phase relay is shown in Figure 1. This technical solution only connects or disconnects the three-phase live wire, and does not control the neutral wire (ground wire in the case of single-phase power supply), which is not conducive to safe electricity use.

Because for a single-phase relay, when the live wire and the neutral wire are reversed, it may cause electric shock to the user; the voltage of the neutral wire to ground in the actual grid is not really 0V, but there is always a low voltage, This voltage is also dangerous to a certain extent; for example, when the wire leaks due to insulation damage and other reasons, there is a hidden danger of electric shock.

Utility model content

In order to solve the deficiencies of magnetic latching relays in anti-constant magnetic field, contact resistance, contact pressure, anti-shock and vibration, and arc wear when applied to smart meters, and for single-phase relays, Inversely, it may cause the danger of electric shock; and the voltage of the neutral line in the power grid to the ground is not really 0V. When the wire leaks due to insulation damage and other reasons, there is a hidden danger of electric shock. The utility model provides an application A two-phase relay driven by a motor in a single-phase smart meter.

The utility model is realized by adopting the following technical solutions.

Design a motor-driven two-phase relay comprising:

The housing is provided with a motor, the worm connected to the motor drives the worm gear pair, the worm gear pair drives the special-shaped gear, the special-shaped gear drives the connecting rod, the connecting rod drives the sliding bar, and the sliding bar drives the first movable contact and the second movable contact moving so that the first movable contact is closed or disconnected from the first stationary contact, and the second movable contact is closed or disconnected from the second stationary contact;

The first moving contact is electrically connected to the first moving spring lead-out piece through the first moving reed group, the part of the first moving spring lead-out piece leading out of the housing is live wire joint one, and the first static contact The part drawn out of the shell through the first static spring is the live wire connector 2;

The second movable contact is electrically connected to the first movable spring lead-out piece through the second movable reed group, the part of the second movable spring lead-out piece drawn out of the housing is the ground wire joint one, and the second static contact The parts drawn out of the housing through the second static spring are the ground wire connector two and the ground wire connector three.

The distance between the ground wire connector 1 and the ground wire connector 3 is smaller than the distance between the live wire connector 1 and the live wire connector 2.

The sliding bar has an upward first moving reed group end card slot and a second moving reed group end card slot for respectively accommodating the first moving reed group end and the second moving reed group end ; The slots at the ends of the first moving reed group and the slots at the ends of the second moving reed group are located on the same plane as the special-shaped gears.

Compared with the prior art, the beneficial effect of the utility model is: in addition to the motor driving method, the pressure of the dynamic and static contacts is increased, and the dynamic and static contacts can be flexibly contacted, the bounce of the contacts is eliminated, and the electrical life of the contacts and In addition to the advantages of increased arc resistance, the slots at the end of the first moving reed group and the second slot at the end of the second moving reed group of the utility model are located in the same level space as the special-shaped gear, which reduces the volume of the relay and optimizes the Product structure; for single-phase power supply, the utility model cuts off the neutral wire while cutting off the live wire, thus ensuring the safety of electricity use. In order to avoid reverse connection of live wire and neutral wire, a grounding terminal is added at the neutral wire connector to ensure that the neutral wire connector will not be connected incorrectly.

Description of drawings

Fig. 1 is a schematic diagram of a front view of a motor-driven three-phase relay in the prior art, as can be seen from this figure, the relay only controls the three-phase live wire;

Fig. 2 is the front schematic diagram of a kind of motor-driven two-phase relay described in the utility model;

Fig. 3 is a three-dimensional schematic diagram of a motor-driven two-phase relay drive device according to the present invention, in which the slots at the end of the first moving reed group and the slot at the end of the second moving reed group are on the same plane as the special-shaped gear ;

Fig. 4 is a three-dimensional schematic diagram of the position setting of each joint of a motor-driven two-phase relay according to the present invention.

detailed description

The utility model will be described below in conjunction with specific embodiments.

As shown in Figures 2 to 4, a motor-driven two-phase relay is designed, the relay includes: a housing 1, a motor 2 is arranged in the housing 1, and the feature is that the worm 13 connected to the motor 2 Drive the turbine gear pair 9, the turbine gear pair 9 drives the special-shaped gear 12, the special-shaped gear 12 drives the connecting rod 11, the connecting rod 11 drives the sliding bar 10, and the sliding bar 10 drives the first movable contact 5 and the second movable contact 16 to move, Make the first movable contact 5 and the first static contact 6 close or disconnect, and the second movable contact 16 and the second static contact 15 close or disconnect;

The first moving contact 5 is electrically connected to the first moving spring lead-out piece 3 through the first moving reed group 4, and the part of the first moving spring lead-out piece 3 drawn out of the housing 1 is a live wire connector-21, The part of the first static contact 6 drawn out of the housing 1 through the first static spring 7 is the live wire connector 2 22;

The second movable contact 16 is electrically connected to the first movable spring lead-out piece 18 through the second movable reed group 17, and the part of the second movable spring lead-out piece 18 drawn out of the housing 1 is the ground wire connector 1 61 , the parts of the second static contact 15 drawn out of the housing 1 through the second static spring piece 14 are the ground wire connector 2 62 and the ground wire connector 3 63 respectively.

The distance between the ground wire connector 1 61 and the ground wire connector 3 63 is smaller than the distance between the live wire connector 1 21 and the live wire connector 2 22 .

The sliding bar 10 has an upward first moving reed group end clip slot 101 and a second moving reed group end clip slot 102, which are used to accommodate the first moving reed group end and the second moving reed respectively. group end; the first moving reed group end slot 101 and the second moving reed group end slot 102 are located on the same plane as the special-shaped gear 12 .

The structural relationship and working principle of each part of a motor-driven two-phase relay described in the utility model are:

The motor 2 is fixedly installed in the housing 1, and a worm 13 is installed on the motor shaft; the worm 13 meshes with the worm gear pair 9; the center of the worm gear pair 9 is a steel shaft 8, and the special-shaped gear 12 is fixedly installed in the housing 1 , The special-shaped gear 12 meshes with the worm gear pair 9.

As shown in Figure 2, the worm gear pair 9 drives the special-shaped gear 12, the special-shaped gear 12 drives the connecting rod 11, the connecting rod 11 drives the sliding bar 10, and the sliding bar 10 drives the first movable contact 5 and the second movable contact 16 to move, Make the first movable contact 5 and the first static contact 6 close or disconnect, and the second movable contact 16 and the second static contact 15 close or disconnect;

As shown in FIG. 3 , the sliding bar 10 has an upward first moving reed set end draw-in groove 101 and a second moving reed set end draw-in groove 102 , as shown in FIG. The end of the moving reed group and the second moving reed group end; the bottom of the two ends is the contact point, because the first moving reed group 4 and the second moving reed group 17 are very elastic, So the contact of the two sets of contacts is reliable.

Since the utility model adopts the upward design of the first movable reed group end draw-in groove 101 and the second movable reed set end draw-in groove 102, the motor 2, the drive mechanism and the drawn joints are all designed in one level, Just greatly reduced the volume of the present utility model.

Compared with the prior art, under the premise of maintaining the original positive and negative pulse drive mode, the first beneficial effect of the utility model is that the motor drive mode increases the pressure of the dynamic and static contacts, and enables the flexible contact of the dynamic and static contacts, Contact bouncing is eliminated. When the relay is closed or open, the worm gear transmission has good self-locking characteristics, which enhances the electrical life and arc resistance of the contacts, and is also conducive to the automatic production of the relay, thereby reducing Manufacturing costs and improved consistency of quality.

The second advantage is that the relay tends to be thinner, which reduces the volume of the relay and optimizes the product structure;

The third advantage is that two sets of contacts are designed for single-phase power supply, and the live wire and neutral wire are connected or disconnected at the same time, which greatly increases the safety of electricity use.

The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. The content of this specification should not be understood as Limitations on the Invention.

Claims (3)

1. A two-phase relay driven by a motor, the relay includes a housing (1), and a motor (2) is arranged inside the housing (1), characterized in that: the worm connected to the motor (2) ( 13) Drive the turbine gear pair (9), the turbine gear pair (9) drives the special-shaped gear (12), the special-shaped gear (12) drives the connecting rod (11), the connecting rod (11) drives the sliding bar (10), the sliding bar ( 10) Drive the first moving contact (5) and the second moving contact (16) to move, so that the first moving contact (5) and the first static contact (6) are closed or disconnected, and the second moving contact The point (16) is closed or disconnected from the second static contact (15); The first moving contact (5) is electrically connected to the first moving spring lead-out piece (3) through the first moving reed group (4), and the first moving spring lead-out piece (3) is led out of the casing (1 ) is live wire connector one (21), and the first static contact (6) is led out of the housing (1) through the first static spring (7) is live wire connector two (22); The second movable contact (16) is electrically connected to the first movable spring lead-out piece (18) through the second movable reed group (17), and the second movable spring lead-out piece (18) is led out of the case (1 ) is the ground wire connector one (61), and the second static contact (15) is drawn out of the housing (1) through the second static spring (14) and is respectively the ground wire connector two (62 ) and ground connector three (63). 2. A motor-driven two-phase relay according to claim 1, characterized in that: The distance between the first ground wire connector (61) and the third ground wire connector (63) is smaller than the distance between the first live wire connector (21) and the second live wire connector (22). 3. A motor-driven two-phase relay according to claim 1, characterized in that: The sliding bar (10) has an upward first moving reed set end slot (101) and a second moving reed set end locking slot (102), which are respectively used to accommodate the first moving reed set end and the end of the second moving reed group; the slot (101) at the end of the first moving reed group and the slot (102) at the end of the second moving reed group are located on the same plane as the special-shaped gear (12).