Contact transmission mechanism of dual-power change-over switch

Abstract

The utility model discloses a contact transmission mechanism of a dual-power change-over switch, which comprises a plurality of shells arranged in parallel, a transmission shaft is rotatably mounted among the plurality of shells, transmission mechanisms rotating along with the transmission shaft are mounted in the plurality of shells, and moving contact assemblies rotating along with arc-shaped sheets are arranged on the outer sides of the transmission mechanisms; the transmission mechanism comprises a rotating shaft, a spacer, two blocking pieces, a first transmission hole and two through holes, the rotating shaft is installed on the outer side of the transmission shaft and rotates along with the transmission shaft, the spacer is arranged on the outer side of the rotating shaft, the two blocking pieces are arranged on the two sides of the spacer respectively, and the first transmission hole is formed in the middle of the rotating shaft; according to the utility model, the transmission shaft can drive the plurality of transmission mechanisms to rotate at the same time, and the transmission mechanisms drive the moving contact assemblies to rotate together, so that the transmission error between the moving contact assemblies can be reduced, the synchronism between the moving contact assemblies can be increased, and the stable switching of a power supply can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of conversion switches, in particular to a contact transmission mechanism of a dual power conversion switch. Background Art

[0002] The main function of the dual power transfer switch is to automatically switch the load circuit from one power source to another when the common power source suddenly fails or the power is cut off, so as to ensure the normal operation of the equipment. It is widely used in high-rise buildings, hospitals, airports, fire protection, chemical industry and other important places where power outages are not allowed. The dual power transfer switch usually has multiple sets of moving and static contacts to meet the use requirements.

[0003] Existing dual power conversion switches will set up a transmission structure between the moving contacts to achieve synchronous rotation between multiple moving contacts. For example, the Chinese patent application No. 201820827415.X discloses a contact system structure of a multi-position conversion switch. The utility model connects the convex part and the concave part to make the rotating shaft linked, so that multiple moving contacts rotate together. However, in actual use, due to processing errors, after multiple transmissions, the errors will be superimposed, resulting in large transmission errors, which will lead to poor synchronization between the moving contacts and unstable power switching. Utility Model Content

[0004] The purpose of the utility model is to provide a contact transmission mechanism of a dual power conversion switch to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a contact transmission mechanism of a dual power conversion switch, comprising a plurality of housings arranged in parallel, a transmission shaft being rotatably installed between the plurality of housings, a transmission mechanism rotating with the transmission shaft being installed inside the plurality of housings, and a moving contact assembly rotating with the arc-shaped piece being provided on the outer side of the transmission mechanism;

[0006] The transmission mechanism includes a rotating shaft, a spacer, two baffles, a first transmission hole and two through holes. The rotating shaft is installed on the outside of the transmission shaft and rotates with the transmission shaft. The spacer is arranged on the outside of the rotating shaft, and the two baffles are respectively arranged on both sides of the spacer. The first transmission hole is arranged in the middle of the rotating shaft, and the two through holes are symmetrically arranged on the spacer.

[0007] As a preferred solution of the utility model, the moving contact assembly includes a moving contact, a spring, a nut, a support rod and a second transmission hole, the support rod is inserted into the through hole, the moving contact is movably installed on the outside of the support rod, the spring is sleeved on the outside of the support rod, the nut is threadedly connected to the outside of the support rod, and the second transmission hole is set in the middle of the moving contact.

[0008] As a preferred solution of the utility model, an arc-shaped piece and a limiting cylinder are provided on the inner wall of the shell, and a circular hole is penetrated through the middle of the limiting cylinder.

[0009] As a preferred solution of the utility model, both ends of the transmission shaft are provided with a rotating part.

[0010] As a preferred solution of the present utility model, the cross section of the transmission shaft is rectangular.

[0011] As a preferred solution of the utility model, arc isolation sheets are installed between adjacent shells, a static contact matching with a moving contact is provided inside the shell, and an arc extinguishing chamber is also provided inside the shell.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the utility model can simultaneously drive multiple transmission mechanisms to rotate through the transmission shaft set up, and the transmission mechanism drives the moving contact assembly to rotate together, thereby reducing the transmission error between each moving contact assembly, increasing the synchronization between each moving contact assembly, and ensuring smooth power switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the transmission mechanism and the transmission shaft of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the moving contact assembly of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the transmission mechanism of the utility model;

[0018] Figure 6 It is a structural schematic diagram of the transmission shaft of the utility model;

[0019] Figure 7 It is a structural schematic diagram of the shell of the utility model.

[0020] In the figure: 1. housing; 2. transmission shaft; 3. arc-isolating plate; 4. static contact; 5. arc-extinguishing chamber; 6. arc-shaped plate; 7. transmission mechanism; 71. rotating shaft; 72. isolating plate; 73. blocking plate; 74. first transmission hole; 75. through hole; 8. limiting cylinder; 9. moving contact assembly; 91. moving contact; 92. spring; 93. nut; 94. support rod; 95. second transmission hole; 10. rotating part. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 7 The utility model provides a technical solution: a contact transmission mechanism of a dual power conversion switch, comprising a plurality of housings 1 arranged in parallel, a transmission shaft 2 is rotatably installed between the plurality of housings 1, the transmission shaft 2 can simultaneously drive a plurality of transmission mechanisms 7 to rotate, and the transmission mechanism 7 drives a moving contact assembly 9 to rotate together, thereby reducing the transmission error between the moving contact assemblies 9, increasing the synchronization between the moving contact assemblies 9, and ensuring smooth power switching, the interiors of the plurality of housings 1 are all equipped with a transmission mechanism 7 that rotates with the transmission shaft 2, and the outer side of the transmission mechanism 7 is provided with a moving contact assembly 9 that rotates with the arc-shaped piece 6;

[0023] The transmission mechanism 7 includes a rotating shaft 71, a spacer 72, two baffles 73, a first transmission hole 74 and two through holes 75. The rotating shaft 71 is installed on the outside of the transmission shaft 2, and the rotating shaft 71 rotates together with the transmission shaft 2. The rotating shaft 71 can rotate together with the transmission shaft 2, and the rotating shaft 71 can drive the moving contact 91 to rotate. The spacer 72 is arranged on the outside of the rotating shaft 71. The spacer 72 is used to separate the two moving contacts 91. The two baffles 73 are respectively arranged on both sides of the spacer 72. The baffles 73 are used to limit the moving contact 91, so that the moving contact 91 is installed more firmly. The first transmission hole 74 is arranged in the middle of the rotating shaft 71. The first transmission hole 74 is adapted to the shape of the transmission shaft 2 so that the transmission shaft 2 passes through the rotating shaft 71 to drive the rotating shaft 71 to rotate. The two through holes 75 are symmetrically arranged on the spacer 72. The through holes 75 facilitate the support rod 94 to pass through the spacer 72.

[0024] Among them, the moving contact assembly 9 includes a moving contact 91, a spring 92, a nut 93, a support rod 94 and a second transmission hole 95. The support rod 94 is inserted into the through hole 75. The moving contact 91 is movably installed on the outside of the support rod 94. The spring 92 is sleeved on the outside of the support rod 94. The spring 92 is used to increase the pressure between the moving contact 91 and the static contact 4, thereby increasing the contact area to reduce the contact resistance. The use of the spring 92 instead of the spring sheet has a simpler structure and is easier to assemble. The nut 93 is threadedly connected to the outside of the support rod 94. The second transmission hole 95 is set in the middle of the moving contact 91. The second transmission hole 95 is adapted to the rotating shaft 71, so that the rotating shaft 71 can drive the moving contact 91 to rotate.

[0025] Among them, the inner wall of the shell 1 is provided with an arc-shaped piece 6 and a limiting cylinder 8, which are used to limit the blocking piece 73, so that the rotating shaft 71 is more stable during rotation. A circular hole is penetrated in the middle of the limiting cylinder 8, which facilitates the transmission shaft 2 to pass through multiple shells 1.

[0026] Wherein, both ends of the transmission shaft 2 are provided with a rotating part 10, and the rotating part 10 is used to support the transmission shaft 2 to rotate.

[0027] The cross section of the transmission shaft 2 is a rectangle, and the rectangle facilitates the transmission shaft 2 to drive the rotating shaft 71 to rotate.

[0028] Among them, arc isolation plates 3 are installed between adjacent shells 1, and the arc isolation plates 3 are used to prevent arcing between phases and improve safety. A static contact 4 that cooperates with the moving contact 91 is provided inside the shell 1. An arc extinguishing chamber 5 is also provided inside the shell 1. The arc extinguishing chamber 5 is used to extinguish the arc and prevent the arc from spreading.

[0029] Specifically, when in use, the external driving mechanism rotates the transmission shaft 2 , the transmission shaft 2 rotates the multiple rotating shafts 71 together, and the rotating shafts 71 rotate the moving contact 91 to achieve disconnection or contact between the moving contact 91 and the stationary contact 4 .

[0030] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" 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 present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contact transmission mechanism of a dual power conversion switch, comprising a plurality of housings (1) arranged in parallel, characterized in that: A transmission shaft (2) is rotatably mounted between the plurality of housings (1), a transmission mechanism (7) that rotates along with the transmission shaft (2) is mounted inside each of the plurality of housings (1), and a moving contact assembly (9) that rotates along with the arc-shaped piece (6) is disposed on the outer side of the transmission mechanism (7); The transmission mechanism (7) comprises a rotating shaft (71), a spacer (72), two baffles (73), a first transmission hole (74) and two through holes (75); the rotating shaft (71) is mounted on the outside of the transmission shaft (2), and the rotating shaft (71) rotates together with the transmission shaft (2); the spacer (72) is arranged on the outside of the rotating shaft (71); the two baffles (73) are respectively arranged on both sides of the spacer (72); the first transmission hole (74) is arranged in the middle of the rotating shaft (71); and the two through holes (75) are symmetrically arranged on the spacer (72).

2. The contact transmission mechanism of the dual power conversion switch according to claim 1 is characterized in that: The moving contact assembly (9) comprises a moving contact (91), a spring (92), a nut (93), a support rod (94) and a second transmission hole (95); the support rod (94) is inserted into the through hole (75); the moving contact (91) is movably mounted on the outer side of the support rod (94); the spring (92) is sleeved on the outer side of the support rod (94); the nut (93) is threadedly connected to the outer side of the support rod (94); and the second transmission hole (95) is arranged in the middle of the moving contact (91).

3. The contact transmission mechanism of the dual power conversion switch according to claim 1 is characterized in that: The inner wall of the housing (1) is provided with an arc-shaped sheet (6) and a limiting cylinder (8), and a circular hole is penetrated through the middle of the limiting cylinder (8).

4. The contact transmission mechanism of the dual power conversion switch according to claim 1 is characterized in that: Both ends of the transmission shaft (2) are provided with rotating parts (10).

5. The contact transmission mechanism of the dual power conversion switch according to claim 1 is characterized in that: The cross section of the transmission shaft (2) is rectangular.

6. The contact transmission mechanism of the dual power conversion switch according to claim 2 is characterized in that: Arc isolation plates (3) are installed between adjacent shells (1), a stationary contact (4) matching with a moving contact (91) is provided inside the shell (1), and an arc extinguishing chamber (5) is also provided inside the shell (1).

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