Moving contact device of dual-power automatic change-over switch

Abstract

The utility model discloses a moving contact device of a dual power supply automatic change-over switch, which comprises an upper shell, a lower shell and a moving contact assembly, the moving contact assembly is arranged in the lower shell, and the upper shell covers the lower shell; the moving contact assembly comprises a first straight arm, a second straight arm and a connecting part, the first straight arm is installed at one end of the connecting part, the second straight arm is connected to the other end of the connecting part, and the first elastic piece and the second elastic piece are located on the two sides of the connecting part respectively. The lower end of the first elastic piece and the lower end of the second elastic piece are connected with the connecting part, and the upper end of the first elastic piece and the upper end of the second elastic piece are connected with the lower shell. Compared with the prior art, the moving contact device is simple in structure, reliable in action and convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a moving contact device of a dual-power automatic conversion switch. Background Art

[0002] In the current existing technology, the moving contact assembly involves many parts and the assembly is complicated. The assembly of the elastic element needs to be completed after the buckle is engaged. During installation, the internal shaft and the contact connecting rod are easily scattered. At this time, it is necessary to open the buckled shell and adjust it to the correct position. Its limiting feature makes it less likely for the moving contact to jump at the moment of contact.

[0003] Therefore, the utility model needs to provide a moving contact device of an automatic power transfer switch which has a simple structure and is easy to assemble. Utility Model Content

[0004] The purpose of the utility model is to provide a moving contact device of a dual power automatic transfer switch, so as to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A moving contact device of a dual power automatic transfer switch comprises: an upper housing, a lower housing and a moving contact assembly, wherein the moving contact assembly is installed inside the lower housing, and the upper housing covers the upper surface of the lower housing;

[0007] The moving contact assembly comprises: a first straight arm, a second straight arm and a connecting portion, wherein the first straight arm is mounted at one end of the connecting portion, the second straight arm is connected to the other end of the connecting portion, and moving contacts are arranged on the upper surfaces of the first straight arm and the second straight arm at ends away from each other;

[0008] A first elastic member and a second elastic member, wherein the first elastic member and the second elastic member are respectively located at two sides of the connecting portion, the lower ends of the first elastic member and the second elastic member are connected to the connecting portion, and the upper ends of the first elastic member and the second elastic member are connected to the lower shell;

[0009] It also includes a supporting boss, which is located on the inner surfaces of the lower shell and the upper shell, and is used to support the movable contact assembly to be installed on the lower shell and the upper shell.

[0010] Furthermore, a circular arc boss is also provided on the supporting boss, and the circular arc boss is located in the middle of the supporting boss.

[0011] Furthermore, the connecting portion is a U-shaped connecting portion, and the first straight arm and the connecting portion, and the connecting portion and the second straight arm are fixedly connected by integral molding.

[0012] Furthermore, riveted columns are provided on both sides of the U-shaped connecting portion, and the riveted columns are used to fix and install the first elastic member and the second elastic member.

[0013] Furthermore, a groove is provided at the ends of the first straight arm and the second straight arm close to each other, and the groove is concave toward the lower surface of the first straight arm and the second straight arm.

[0014] Furthermore, a first limiting column and a second limiting column are also provided on the upper surface of the lower shell, wherein the first limiting column is used to connect one end of the first elastic member and the second elastic member, and the second limiting column is used to connect the other end of the first elastic member and the second elastic member.

[0015] Furthermore, the first limiting column and the second limiting column each include a first connecting rod, a second connecting rod and a cross rod, the upper ends of the first connecting rod and the second connecting rod are connected to the top of the lower shell, and the lower ends of the first connecting rod and the second connecting rod are respectively connected to the two ends of the cross rod.

[0016] Furthermore, the two grooves correspond one-to-one to the two cross bars respectively.

[0017] Furthermore, the first elastic member and the second elastic member are V-shaped elastic members, and the V-shaped elastic member is formed by a tension spring.

[0018] Furthermore, sliding notches are provided on both sides of the lower shell, and sliding notch bosses are provided on both sides of the upper shell, and the sliding notches correspond to the sliding notch bosses one by one.

[0019] The beneficial effects of the utility model are:

[0020] The movable contact device of the utility model has a simple installation structure, reliable operation, and is relatively easy to assemble, thereby improving assembly efficiency. Through the multi-degree-of-freedom limit of the lower shell, sliding movement will occur when the movable and static contacts are fitted, thereby reducing their bounce after contact and reducing the risk of contact burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the movable contact device of the utility model;

[0022] Figure 2 It is an exploded view of the movable contact device of the utility model;

[0023] Figure 3 It is a structural diagram of the lower housing of the utility model;

[0024] Figure 4 It is a structural diagram of the lower housing of the utility model;

[0025] Figure 5 It is a structural diagram of the upper shell of the utility model;

[0026] Figure 6 This is a structural diagram of the upper shell of the utility model;

[0027] Figure 7 It is a double split position diagram of the new moving contact system of the utility model;

[0028] Figure 8 It is a closing position diagram of the moving contact system of the utility model.

[0029] Reference numerals:

[0030] Upper and lower shells 1, upper shell 2, movable contact assembly 3, first elastic member 4, second elastic member 5, supporting boss 6, arc boss 7, riveting column 8, first limiting column 9, second limiting column 10, sliding notch 11, sliding notch boss 12;

[0031] A first straight arm 31, a second straight arm 32, a connecting portion 33, a moving contact 34, and a groove 35;

[0032] Reinforcement 61;

[0033] Inner groove 81;

[0034] A first connecting rod 101 , a second connecting rod 102 , a cross rod 103 , and a third connecting rod 104 . DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0036] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0039] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0040] like Figures 1 to 8 As shown, a moving contact device of a dual power automatic transfer switch comprises: a lower housing 1, an upper housing 2 and a moving contact assembly 3, wherein the moving contact assembly 3 is installed in the lower housing 1, and the upper housing 2 covers the upper surface of the lower housing 1;

[0041] The moving contact assembly 3 includes: a first straight arm 31, a second straight arm 32 and a connecting portion 33, wherein the first straight arm 31 is mounted at one end of the connecting portion 33, and the second straight arm 32 is connected to the other end of the connecting portion 33, and moving contacts 34 are arranged on the upper surfaces of the first straight arm 31 and the second straight arm 32 at ends away from each other. In this embodiment, the first straight arm 31 and the connecting portion 33, and the connecting portion 33 and the second straight arm 32 are connected in an integrally formed manner. Since the integrally formed manner is used for fixed connection, it is ensured that the first straight arm 31 and the connecting portion 33, and the connecting portion 33 and the second straight arm 32 can be firmly connected to each other, thereby avoiding deformation due to external force, thereby extending the service life;

[0042] A first elastic member 4 and a second elastic member 5, wherein the first elastic member 4 and the second elastic member 4 have the same structure and are equal in size. In this embodiment, the first elastic member 4 and the second elastic member 5 are V-shaped elastic members, and the V-shaped elastic members are made of tension springs;

[0043] Specifically, the first elastic member 4 and the second elastic member 5 are respectively located on both sides of the connecting portion 33, the lower ends of the first elastic member 4 and the second elastic member 5 are connected to the connecting portion 35, and the upper ends of the first elastic member 4 and the second elastic member 5 are connected to the lower shell 1;

[0044] It also includes a supporting boss 6, which is located on the inner surfaces of the lower shell 1 and the upper shell 2. The supporting boss 6 is used to support the moving contact assembly 3 to be installed on the lower shell 1 and the upper shell 2. The supporting boss 6 is fixed to the inner surfaces of the lower shell 1 and the upper shell 2 by an integral molding method. In this embodiment, the supporting boss 6 is in the shape of a semicircular arc, and the lower parts of both sides of the semicircular arc-shaped supporting boss 6 are also provided with reinforcing ribs 61. The upper ends of the reinforcing ribs 61 are connected and fixed to the lower surface of the supporting boss 6. The lower end of the reinforcing rib 61 extends to the side away from the supporting boss 6, and the reinforcing rib 61 is provided to support the supporting boss 6. When in use, the moving contact assembly 3 is installed on the side of the supporting boss 6 away from the upper shell or the lower shell. When the moving contact assembly 3 needs to rotate during opening and closing, since the reinforcing ribs 61 are provided on both sides of the lower surface of the supporting boss 6, it can play a supporting role and avoid deformation due to the reception. The reinforcing rib 7 is also provided with a mounting hole, and the upper shell and the lower shell are fixed together by passing the locking screw through the mounting hole.

[0045] Through the above method, it can be known that since the angle between the first straight arm 31 and the second straight arm 32 is set to be less than 170°, the first elastic member 4 and the second elastic member 5 can complete the contact conversion at a very small twisting angle, which greatly improves the force conversion efficiency;

[0046] In addition, it should be noted that in the present application, the first elastic member 4 and the second elastic member 5 are uniformly assembled on a single-side shell, which has a simple structure and is easy to assemble. The multi-degree-of-freedom limiting feature allows the contacts to slide after fitting with the static contact at the moment of contact to ensure a more reliable action.

[0047] In addition, it is worth mentioning that the support boss 6 is further provided with an arc boss 7, and the arc boss 7 is located in the middle of the support boss 6. In the present embodiment, the shape of the arc boss 7 is a U-shaped structure, and the shape of the actual arc boss can also be other shapes, which will not be specifically described one by one;

[0048] In addition, it should be noted that the arc boss 7 is set to a U-shaped structure, and the two ends of the riveting shaft 8 are inserted into the U-shaped groove of the arc boss 7 during assembly, thereby ensuring that the moving contact assembly will not exceed the preset movement range due to rotation.

[0049] Furthermore, it should be noted that the connecting portion is a U-shaped connecting portion, and the first straight arm 31 and the connecting portion 33, and the connecting portion 33 and the second straight arm 32 are fixedly connected by integral molding. Since the integral molding is used for connection and fixation, it ensures that the first straight arm 31, the connecting portion 33 and the second straight arm 32 can be tightly connected to each other to avoid deformation due to external force. A soft connection welding groove is also provided at the lower end of the connecting portion 33.

[0050] In order to fix the first elastic member 4 and the second elastic member 5, riveted columns 8 are further provided on both sides of the U-shaped connecting portion 33, and the riveted columns 8 are used to fix and install the first elastic member 4 and the second elastic member 5. In this embodiment, the riveted columns 8 on both sides are fixed to the two sides of the connecting portion by welding, or the two riveted columns are integrated columns, and a hole is opened at the lower end of the connecting portion 33, one end of the riveted column 8 passes through the hole, and the two ends of the riveted column 8 extend to the side away from the connecting portion. In order to firmly fix the first elastic member 4 and the second elastic member 5, inner grooves 81 are further provided on the axial outer surface at both ends of the riveted column 8, and the lower ends of the first elastic member 4 and the second elastic member 5 are inserted into the inner grooves 81, thereby preventing the first elastic member 4 and the second elastic member 5 from slipping off the riveted column 8.

[0051] In addition, it should be noted that, in order to facilitate installation, a groove 35 is further provided at the ends of the first straight arm 31 and the second straight arm 32 close to each other, and the groove 35 is concave toward the lower surface of the first straight arm 31 and the second straight arm 32 .

[0052] The upper surface of the lower shell 1 is also provided with a first limiting column 9 and a second limiting column 10, the first limiting column 9 is used to connect one end of the first elastic member 4 and the second elastic member 5, and the second limiting column 10 is used to connect the other end of the first elastic member 4 and the second elastic member 5. During installation, one end of the first elastic member 4 and the second elastic member 5 is hooked on the first limiting column 9, and the other end of the first elastic member 4 and the second elastic member 5 is hooked on the second limiting column 10.

[0053] Specifically, the first limiting column 9 and the second limiting column 10 both include a first connecting rod 101, a second connecting rod 102 and a cross bar 103. In the present embodiment, the first connecting rod 101 and the second connecting rod 102 have the same shape and size, and the first connecting rod 101, the cross bar 103 and the second connecting rod 102 are connected and fixed by an integral molding method. The upper ends of the first connecting rod 101 and the second connecting rod 102 are connected to the top of the lower shell body by an integral molding method, and the lower ends of the first connecting rod 101 and the second connecting rod 102 are respectively connected to the two ends of the cross bar 103 by an integral molding method, so as to ensure that the first connecting rod 101, the cross bar 103 and the second connecting rod 102 and the first connecting rod 101 and the second connecting rod 102 are tightly connected to each other with the top of the upper shell body 2, so as to avoid deformation of the first limiting column 9 and the second limiting column 10 due to the force of the tension spring;

[0054] In addition, in order to prevent the hook portions of the first elastic member 4 and the second elastic member 5 from colliding with each other, a third connecting rod 104 is further provided in the middle of the first connecting rod 101 and the second connecting rod 102, and the lower end of the third connecting rod 104 is connected to the cross bar 103, and the upper end of the third connecting rod 104 is connected to the top inner surface of the lower shell 1.

[0055] For ease of installation, the two grooves 35 correspond to the two cross bars 103 respectively, so that the cross bars 103 and the grooves 35 cooperate with each other during assembly to ensure that the moving contact assembly rotates around the riveting axis to avoid displacement.

[0056] In order to extend the first straight arm 31 and the second straight arm 32 out of the lower shell 1 and the upper shell 2, in the present embodiment, sliding grooves 11 are further provided on both sides of the lower shell 1, and sliding groove bosses 12 are further provided on both sides of the upper shell 2. The sliding grooves 11 correspond one to one with the sliding groove bosses 12, and the width of the sliding grooves 11 is greater than the width of the first straight arm 31 and the second straight arm 32, so that the first straight arm 31 and the second straight arm 32 can slide up and down in the sliding grooves 11.

[0057] like Figure 7 As shown, at this time, the contact is in a double-split state, and the first straight arm 31 and the second straight arm 32 are tightly attached to the upper surface of the sliding groove of the lower housing 1 through the first stretched state of the first elastic member 4 and the second elastic member 5.

[0058] Depend on Figure 7 to Figure 8The double-opening state is changed to the closing state. At this time, the moving contact on the first straight arm contacts the static contact and rotates with the housing. The second straight arm 32 gradually separates from the upper surface of the sliding slot. The first elastic member 4 and the second elastic member 5 are stretched to the left to the second state, providing the final pressure to the contact. Due to the multi-degree-of-freedom limiting feature, the contact will slide to one side after contact, preventing the contact from jumping after contact. At this time, Figure 8 As shown, the riveted shaft 8 swings in the lower limiting arc boss groove of the contact mounting upper shell until one side is tightly attached, and the right side of the limiting feature of the groove 35 is tightly attached to the lower surface of the cross bar 103, reaching the closed state.

[0059] Depend on Figure 8 to Figure 7 To switch the circuit breaker to the double-open state, as the moving contact 34 on the second straight arm is released, the first elastic member 4 and the left side of the second elastic member 5 are released to shrink from the second state to the first state, and the contact connecting rod returns to the initial double-open state.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A moving contact device of a dual power automatic transfer switch, characterized in that: include: An upper housing, a lower housing and a movable contact assembly, wherein the movable contact assembly is installed inside the lower housing, and the upper housing covers the upper portion of the lower housing; The moving contact assembly comprises: a first straight arm, a second straight arm and a connecting portion, wherein the first straight arm is mounted at one end of the connecting portion, the second straight arm is connected to the other end of the connecting portion, and moving contacts are arranged on the upper surfaces of the first straight arm and the second straight arm at ends away from each other; A first elastic member and a second elastic member, wherein the first elastic member and the second elastic member are respectively located at two sides of the connecting portion, the lower ends of the first elastic member and the second elastic member are connected to the connecting portion, and the upper ends of the first elastic member and the second elastic member are connected to the lower shell; It also includes a supporting boss, which is located on the inner surfaces of the lower shell and the upper shell, and is used to support the movable contact assembly to be installed on the lower shell and the upper shell.

2. The moving contact device according to claim 1, characterized in that: The supporting boss is also provided with an arc boss, and the arc boss is located in the middle of the supporting boss.

3. The moving contact device according to claim 1, characterized in that: The connecting portion is a U-shaped connecting portion, and the first straight arm and the connecting portion, and the connecting portion and the second straight arm are fixedly connected by integral molding.

4. The moving contact device according to claim 3, characterized in that: Riveted columns are also provided on both sides of the U-shaped connecting portion, and the riveted columns are used to fix the first elastic member and the second elastic member.

5. The moving contact device according to claim 3, characterized in that: A groove is further provided at the ends of the first straight arm and the second straight arm close to each other, and the groove is concave toward the lower surface direction of the first straight arm and the second straight arm.

6. The moving contact device according to claim 1, characterized in that: A first limiting column and a second limiting column are further provided on the upper surface of the lower shell, wherein the first limiting column is used to connect one end of the first elastic member and the second elastic member, and the second limiting column is used to connect the other end of the first elastic member and the second elastic member.

7. The moving contact device according to claim 6, characterized in that: The first limiting column and the second limiting column both include a first connecting rod, a second connecting rod and a cross rod, the upper ends of the first connecting rod and the second connecting rod are connected to the top of the lower shell, and the lower ends of the first connecting rod and the second connecting rod are respectively connected to the two ends of the cross rod.

8. The moving contact device according to claim 5, characterized in that: The two grooves correspond to the two cross bars one by one.

9. The moving contact device according to claim 1, characterized in that: The first elastic member and the second elastic member are V-shaped elastic members, and the V-shaped elastic members are formed by tension springs.

10. The moving contact device according to claim 1, characterized in that: Sliding notches are also provided on both sides of the lower shell, and sliding notch bosses are also provided on both sides of the upper shell, and the sliding notches correspond to the sliding notch bosses one by one.

Images