Contact rotating mechanism and switching device

Abstract

The contact rotating mechanism comprises a contact support and at least one contact, the contact support is installed on a base of a switch, a cylinder is arranged in the middle of the contact support, the contact is rotatably arranged on the cylinder in a sleeving mode, elastic pieces are further arranged on the two sides of the contact, bosses are arranged at the two ends of the contact, and the elastic pieces are arranged on the bosses. The boss is used for being in contact with a static contact. Compared with the prior art, the mechanism and the switching device are simple in structure, and for an alternating-current and direct-current low-voltage switching device, higher arc voltage can be obtained under the conditions of limited size and controllable cost, which is the current technical development direction.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to a contact rotating mechanism and a switch device. Background Art

[0002] With the rapid development of new energy technologies such as photovoltaics and wind power and the widespread use of high-power electrical equipment, AC and DC low-voltage systems are moving towards higher voltage levels, which in turn puts forward higher voltage and larger current breaking requirements for AC and DC low-voltage switchgear. AC switchgear breaks the loop current by taking advantage of the current zero crossing opportunity, while DC current has no natural zero crossing point. Most DC switches break the current by increasing the arc voltage to force the current to cross zero.

[0003] The interruption of the arc of a polarized DC circuit breaker generally utilizes a permanent magnet to drive the arc to move to the arc extinguishing area, and the arc is extinguished by means of metal grids, insulating grids, narrow gaps, etc., while the DC arc of a bidirectional non-polarized circuit breaker usually cannot be directly driven by a permanent magnet.

[0004] The non-polarity products in the industry are all for expanding DC products under the existing AC structure, using a multi-pole series connection method. After the multi-pole splicing, a short-circuit bus is required to connect. The product is large in size and high in cost, and the high-voltage bidirectional DC current has poor arc driving and arc extinguishing effects.

[0005] Therefore, the present invention needs to provide a simple structure, and for AC and DC low-voltage switching electrical appliances, how to obtain a higher arc voltage under limited volume and controllable cost conditions is the current technical development direction. Summary of the invention

[0006] The object of the present invention is to provide a contact rotation mechanism and a switch device, so as to solve the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A contact rotation mechanism comprises: a contact support and at least one contact, wherein the contact support is mounted on a base of a switch, a cylinder is provided in the middle of the contact support, the contact is rotatably mounted on the cylinder, elastic parts are also provided on both sides of the contact, and bosses are provided at both ends of the contact, and the bosses are used to contact each other with a static contact.

[0008] Furthermore, the contact includes a first contact and a second contact, the first contact and the second contact are arranged in series, and the first contact and the second contact have the same shape and size.

[0009] Furthermore, a first protrusion is provided on a side of the first contact close to the second contact, and a second protrusion matching with the first protrusion is provided on a side of the second contact close to the first contact.

[0010] Furthermore, it also includes a limiting member, which is installed in cooperation with the contact support. On the one hand, the limiting member enables the first contact and the second contact to be firmly installed on the contact support to prevent them from falling. On the other hand, the limiting member increases the strength of the contact support to prevent deformation after being subjected to the rotational force of the first contact and the second contact.

[0011] Furthermore, one end of the elastic member is in conflict with the contact, and the other end of the elastic member is in conflict with the contact support.

[0012] Furthermore, the first contact and the second contact both include a waist hole, contact arms are provided on both sides of the waist hole, and the boss is installed at one end of the contact arm away from the waist hole.

[0013] Furthermore, the contact support is provided with a jump buckle, which is installed in the edge hole of the contact support through a jump buckle shaft, and also includes a lock buckle and a connecting piece, wherein the lock buckle is located above the contact support. The connecting member is located below the contact support.

[0014] A switch device comprises: a shell, an operating mechanism, a magnetic release, a first arc extinguishing chamber, a second arc extinguishing chamber, a first static contact and a second static contact, wherein the operating mechanism is located at the upper part of the shell and partially extends out of the shell, the first arc extinguishing chamber and the second arc extinguishing chamber are installed in the shell, the first static contact is located near the upper part of the first arc extinguishing chamber, and the second static contact is located below the second arc extinguishing chamber, and also comprises the above-mentioned contact rotation mechanism, wherein the contact rotation mechanism is located between the first arc extinguishing chamber and the second arc extinguishing chamber, the operating mechanism is connected to the contact rotation mechanism through a connecting rod, the magnetic release is located below the contact rotation mechanism, and the magnetic release cooperates with the contact rotation mechanism through a tripping rod.

[0015] Furthermore, it also includes an indicator, which includes a top block and an indicator end. The top block and the indicator end are connected to each other through a positioning shaft, and the indicator is installed on the positioning hole in the shell through the positioning shaft. The upper end of the indicator end is partially exposed outside the window reserved on the shell.

[0016] Furthermore, it also includes an arc isolation cover, which is located between the first arc extinguishing chamber and the second arc extinguishing chamber. The contact rotation mechanism is located in the space formed by the arc isolation cover, so that the first contact and the second contact move in the space. A magnetic conductive plate is also provided between the first arc extinguishing chamber, the second arc extinguishing chamber and the arc isolation cover. The first arc extinguishing chamber, the second arc extinguishing chamber, and the magnetic conductive plate form a closed magnetic circuit.

[0017] The beneficial effects of the present invention are: Since a contact rotating mechanism is provided, the contact rotating mechanism is driven to rotate by the rotation of the operating mechanism, thereby contacting the first static contact and the second static contact, thereby realizing the opening and closing of the switching device, and the arc isolation cover is provided so that the Lorentz force on the arc is maximized at the moment the arc is generated, so that the arc is quickly transferred from the contact part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the contact rotation mechanism of the present invention; Figure 2 is a structural diagram of the first contact and the second contact of the present invention; Figure 3 is a schematic structural diagram of a switch device of the present invention; Figure 4 It is a structural diagram of the operating mechanism and the contact rotation mechanism of the present invention; Figure 5 It is a structural diagram of the operating mechanism and the contact rotation mechanism of the present invention; Figure 6 is a cross-sectional view of the magnetic release of the present invention; Figure 7 It is a structural diagram of the magnetic release of the present invention; Figure 8 It is a structural diagram of the arc extinguishing chamber and the contact of the present invention; Fig. 9 is a structural diagram of the second stationary contact of the present invention; Fig.10 It is a structural diagram of the arc isolation cover of the present invention; Fig.11 It is a structural diagram of the indicator of the present invention.

[0019] Reference numerals: Contact support 1, contact 2, base 3, cylinder 4, elastic member 5, boss 6, first static contact 7, second static contact 8, limiting member 9, tripping buckle 10, tripping buckle shaft 11, lock 12, connecting member 13, operating mechanism 14, magnetic release 15, first arc extinguishing chamber 16, second arc extinguishing chamber 17, overload release 19, tripping rod 21, connecting rod 22, indicator 23, window 24, arc shield 25, magnetic plate 26 A first contact 2-1, a second contact 2-2, a first protrusion 2-3, a second protrusion 2-4, a protrusion 2-5, and a waist hole 2-6; Handle 14-1, hand wheel 14-2, stopper 14-3; Skeleton 15-1, static iron core 15-2, moving iron core 15-3, push rod 15-4, spring 15-5, coil 15-6; Top block 23-1, indicating end 23-2. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] Among them, it should 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 present invention 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 present invention.

[0022] 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 invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] 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.

[0024] 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.

[0025] like Figures 1 to 11 As shown, a contact rotation mechanism comprises: a contact support 1 and at least one contact 2, wherein the contact support 1 is mounted on a base 3 of a switch, a cylinder 4 is provided in the middle of the contact support 1, the contact 2 is rotatably mounted on the cylinder 4, elastic members 5 are further provided on both sides of the contact 2, and bosses 6 are provided at both ends of the contact 2, and the bosses 6 are used to contact each other with the stationary contact.

[0026] From the above method, it can be known that since a contact rotating mechanism is provided, the contact rotating mechanism is driven to rotate by the rotation of the operating mechanism, thereby contacting the first static contact 7 and the second static contact 8, thereby realizing the opening and closing of the switching device, and the arc-isolating cover is provided so that at the moment of arc generation, the Lorentz force on the arc is maximized, so that the arc is quickly transferred from the contact part.

[0027] Specifically, Figure 2 As shown, the contact 2 includes a first contact 2-1 and a second contact 2-2, the first contact 2-1 and the second contact 2-2 are arranged in series, and the first contact 2-1 and the second contact 2-2 have the same shape and size. In order to firmly fix the first contact 2-1 and the second contact 2-2, a first boss 2-3 is also provided on the side of the first contact 2-1 close to the second contact 2-2, and a second boss 2-4 is provided on the side of the second contact 2-2 close to the first contact 2-1 to cooperate with the first boss 2-3. Through the cooperation of the first boss 2-3 and the second boss 2-4, a certain gap is formed between the first contact and the second contact, which is beneficial to the narrow gap effect and arc extinguishing, and also prevents the first contact and the second contact from sticking to each other and reducing the temperature rise.

[0028] In addition, it is worth noting that it also includes a limiting member 9, which is installed in cooperation with the contact support. In order to cooperate with the contact support, a fixing rod is also provided on the side of the limiting member 9 close to the contact support 1, and the fixing rod cooperates with the cylinder on the contact support. The cooperation between the fixing rod and the cylinder ensures that the limiting member can firmly cooperate with the contact support. On the one hand, the limiting member 9 enables the first contact 2-1 and the second contact 2-2 to be firmly installed on the contact support 1 to prevent them from falling. On the other hand, the limiting member 9 increases the strength of the contact support 1 to prevent deformation after being subjected to the rotational force of the first contact 2-1 and the second contact 2-2.

[0029] In addition, it should be noted that one end of the elastic member 5 is in conflict with the contact 2, and the other end of the elastic member 5 is in conflict with the contact support 1. In the present embodiment, the elastic member 5 is made of a compression spring. The setting of the elastic member 5 can play a supporting role on the one hand and a resetting role on the other hand. In order to ensure that the elastic member can be firmly fixed between the contact and the contact support, a protrusion 2-5 for installing the elastic member is also provided on the side of the contact close to the elastic member, thereby ensuring that the elastic member 5 will not fall off.

[0030] Furthermore, in order to install the first contact 2-1 and the second contact 2-2, the first contact 2-1 and the second contact 2-2 both include a waist hole 2-6, the waist holes 2-6 of the first contact 2-1 and the second contact 2-2 have the same shape, contact arms are provided on both sides of the waist hole 2-6, the boss 6 is installed at the end of the contact arm away from the waist hole 2-6, and the first contact 2-1 and the second contact 2-2 are installed together on the cylinder 4 of the contact support 1. Due to the existence of the waist hole 2-6, when the forces on both sides of the first contact 2-1 and the second contact 2-2 are unbalanced, the force center is moved by moving the waist hole 2-6, thereby balancing the forces on both sides of the contacts.

[0031] In addition, it is worth noting that the contact support 1 is also provided with a jump buckle 10, which is installed in the edge hole of the contact support 1 through a jump buckle shaft 11, and also includes a lock buckle 12 and a connecting member 13, wherein the lock buckle 12 is located above the contact support 1, and the connecting member 13 is located below the contact support 1.

[0032] A switch device, such as Figure 3 As shown, it includes: a housing, an operating mechanism 14, a magnetic release 15, a first arc extinguishing chamber 16, a second arc extinguishing chamber 17, a first static contact 7 and a second static contact 8. The housing includes a base 3 and a cover. The operating mechanism 14 is located at the upper part of the housing and partially extends out of the housing. The first arc extinguishing chamber 16 and the second arc extinguishing chamber 17 are installed in the housing. The first static contact 7 is located at the upper part of the first arc extinguishing chamber 16 and connects the connecting row 18, the coil 15-6 and the overload release 19 to form a "J"-shaped conductive loop similar to the first fixed contact. The connecting row 18 is connected to the coil 15-6 through a soft connection. The first arc extinguishing chamber and the second arc extinguishing chamber are arranged inside the "J"-shaped structure. When the moving contact is separated from the fixed contact, an arc is generated between the moving contact and the fixed contact. Since the current in the loop will generate a magnetic field, the entire magnetic field is located inside the loop, that is, the position where the arc is generated and the position of the first arc extinguishing chamber and the second arc extinguishing chamber. Under the action of the magnetic field, the arc will continue to receive the Lorentz force in the direction of the arc extinguishing chamber until the arc is extinguished; When the current enters from the right side, the direction of the magnetic field inside the second static contact 8 circuit is perpendicular to the paper surface and upward. When an arc is generated, the current direction in the arc is from bottom to top. According to the left-hand rule, the Lorentz force received by the arc is to the right, and the arc moves toward the second arc extinguishing chamber 17. When the arc enters from the left side, the direction of the magnetic field inside the first static contact 7 circuit is perpendicular to the paper surface and downward. When an arc is generated, the current direction in the arc is from top to bottom. According to the left-hand rule, the Lorentz force received by the arc is to the right, and the arc moves toward the first arc extinguishing chamber 16.

[0033] It also includes the above-mentioned contact rotation mechanism, which is located between the first arc extinguishing chamber 16 and the second arc extinguishing chamber 17, the operating mechanism is connected to the contact rotation mechanism through a connecting rod, the magnetic release 15 is located below the contact rotation mechanism, and the magnetic release 15 cooperates with the contact rotation mechanism through a tripping rod 21; like Figure 6 and Figure 7 As shown, the magnetic release 15 includes a skeleton 15-1, a static iron core 15-2, a moving iron core 15-3 and a push rod 15-4 are arranged in the skeleton 15-1, a spring 15-5 is arranged between the static iron core 15-2 and the moving iron core 15-3, the push rod 15-4 is located at one end of the static iron core 15-2 away from the moving iron core 15-3, a coil 15-6 is wound around the outer surface of the skeleton 15-1, and the lower part of the coil 15-6 is also provided Magnetic yoke 15-7, when a large current flows through the switch device, a strong magnetic field will be generated inside the coil 15-6, and the magnetic field will magnetize the static iron core 15-2 and the moving iron core 15-3; so that suction is generated between the static iron core 15-2 and the moving iron core 15-3, so that the moving iron core 15-3 moves toward the static iron core 15-2, and during the movement, the push rod 15-4 is pushed, and the push rod 15-4 moves forward to push the trip rod 21, and the trip rod 21 pushes the lock, so that the switch is tripped. After a certain period of time when the overload release 15 flows through a current exceeding the rated current, a large amount of heat will be generated, and the overload release will bend. During the bending process, it will contact the trip rod, causing the trip rod to move, so that the trip rod pushes the lock, so that the switch is tripped and overload protection is achieved.

[0034] like Figure 4 As shown, the operating mechanism 14 includes: a handle 14-1 and a handwheel 14-2, the handle 14-1 is installed on the handwheel 14-2, the handwheel 14-2 is also provided with a stopper 14-3, and the handwheel 14-2 is connected to the contact rotation mechanism through a connecting rod. When in use, the operating mechanism acts on the handle 14-1 through the force, the handle 14-1 drives the handwheel 14-2, the handwheel 14-2 drives the connecting rod 22 to move, and the connecting rod 22 drives the contact rotation mechanism to rotate and contact the first static contact 7 and the second static contact 8, thereby realizing the opening and closing of the switch device of the present invention.

[0035] In addition, it should be noted that Fig.11As shown, it also includes an indicator 23, which includes a top block 23-1 and an indicator end 23-2. The top block 23-1 and the indicator end 23-2 are connected to each other at the ends thereof close to each other through a positioning shaft 23-3, and the indicator 23 is installed on the positioning hole in the shell through the positioning shaft 23-3. The upper end of the indicator end 23-2 is partially exposed outside the window 24 reserved on the shell. When the product is closed, the contact rotation mechanism pushes the top block to the left, so that the indicator end on the indicator moves left and right, and displays different window positions through the matching windows reserved in the shell, thereby realizing the opening and closing state indication of the switch device.

[0036] Further, if Fig.10 As shown, it also includes an arc shield 25, which is located between the first arc extinguishing chamber 16 and the second arc extinguishing chamber 17. The contact rotation mechanism is located in the space formed by the arc shield, so that the first contact 18 and the second contact 19 move in the space. A magnetic conductive plate 26 is also provided between the first arc extinguishing chamber 16, the second arc extinguishing chamber 17 and the arc shield 25. The first arc extinguishing chamber 16, the second arc extinguishing chamber 17, and the magnetic conductive plate 26 form a closed magnetic circuit, so that at the moment of arc generation, the Lorentz force on the arc is maximized, so that the arc is quickly transferred from the contact part.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A contact rotation mechanism, characterized in that: include: A contact support and at least one contact, wherein the contact support is mounted on a base of the switch, a cylinder is provided in the middle of the contact support, the contact is rotatably mounted on the cylinder, elastic parts are also provided on both sides of the contact, and bosses are provided at both ends of the contact, and the bosses are used to contact with the static contact.

2. The contact rotation mechanism according to claim 1, characterized in that: The contact comprises a first contact and a second contact, the first contact and the second contact are arranged in series, and the first contact and the second contact have the same shape and size.

3. The contact rotation mechanism according to claim 2, characterized in that: A first protrusion is further provided on the side of the first contact close to the second contact, and a second protrusion matching with the first protrusion is provided on the side of the second contact close to the first contact.

4. The contact rotation mechanism according to claim 2, characterized in that: It also includes a limiting member, which is installed in cooperation with the contact support. On the one hand, the limiting member enables the first contact and the second contact to be firmly installed on the contact support to prevent them from falling. On the other hand, the limiting member increases the strength of the contact support to prevent deformation caused by the rotational force of the first contact and the second contact.

5. The contact rotation mechanism according to claim 1, characterized in that: One end of the elastic member contacts the contact, and the other end of the elastic member contacts the contact support.

6. The contact rotation mechanism according to claim 3, characterized in that: The first contact and the second contact both include a waist hole, contact arms are provided on both sides of the waist hole, and the boss is installed at one end of the contact arm away from the waist hole.

7. The contact rotation mechanism according to claim 2, characterized in that: The contact support is also provided with a jump buckle, which is installed in the edge hole of the contact support through a jump buckle shaft, and also includes a lock buckle and a connecting piece, wherein the lock buckle is located above the contact support and the connecting piece is located below the contact support.

8. A switch device, characterized in that: include: A shell, an operating mechanism, a magnetic release, a first arc extinguishing chamber, a second arc extinguishing chamber, a first static contact and a second static contact, wherein the operating mechanism is located at the upper part of the shell and partially extends out of the shell, the first arc extinguishing chamber and the second arc extinguishing chamber are installed in the shell, the first static contact is located near the upper part of the first arc extinguishing chamber, and the second static contact is located below the second arc extinguishing chamber, and also includes the above-mentioned contact rotation mechanism, the contact rotation mechanism is located between the first arc extinguishing chamber and the second arc extinguishing chamber, the operating mechanism is connected to the contact rotation mechanism through a connecting rod, the magnetic release is located below the contact rotation mechanism, and the magnetic release cooperates with the contact rotation mechanism through a tripping rod.

9. The switch device according to claim 8, characterized in that: It also includes an indicator, which includes a top block and an indicator end. The top block and the indicator end are connected to each other through a positioning shaft, and the indicator is installed on the positioning hole in the shell through the positioning shaft. The upper end of the indicator end is partially exposed outside the window reserved on the shell.

10. The switch device according to claim 8, characterized in that It also includes an arc isolation cover, which is located between the first arc extinguishing chamber and the second arc extinguishing chamber. The contact rotation mechanism is located in the space formed by the arc isolation cover, so that the first contact and the second contact move in the space. A magnetic conductive plate is also provided between the first arc extinguishing chamber, the second arc extinguishing chamber and the arc isolation cover. The first arc extinguishing chamber, the second arc extinguishing chamber and the magnetic conductive plate form a closed magnetic circuit.

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