Operating mechanism of manual transfer switch

Abstract

The present invention discloses an operating mechanism of a manual conversion switch, which comprises: an actuator, a bracket, a support plate, a connector, a gear and a round shaft, wherein the support plate is mounted on the bracket, the actuator, the gear and the connector are all mounted on the support plate, and the round shaft is mounted on the actuator. The operating mechanism of the manual conversion switch is provided with two gears and two connectors, which respectively constitute a common transmission chain and a spare transmission chain of the operating mechanism. When the actuator rotates clockwise, the connector of the common transmission chain rotates clockwise, and the connector of the spare transmission chain is stationary; when the actuator rotates counterclockwise, the connector of the spare transmission chain rotates counterclockwise, and the connector of the common transmission chain is stationary, thereby achieving the purpose of operating two switches for alternating conversion. The operating mechanism adopting the technical solution of the present invention can reduce the external dimensions of the product, save the installation dimensions in the switch cabinet, reduce the manufacturing cost of the switch cabinet and improve the use performance.

Description

Technical Field

[0001] The invention relates to a low-voltage switch device, in particular to an operating mechanism of a manual transfer switch. Background Art

[0002] The transfer switch is divided into manual transfer operation mode and automatic transfer operation mode, which is used in the power distribution system as an alternating conversion between two lines when a circuit fails. When the transfer switch of the automatic transfer mode is converted, the circuit power-off time is short, while when the transfer switch of the manual transfer operation mode is converted, the conversion speed is not as fast as the automatic transfer switch, and the normal circuit is restored as timely. However, when the operating system of the automatic transfer switch or the entire power control circuit occasionally fails, the basic function of the switch conversion circuit is lost. Although the automatic transfer switch itself has a manual function. Since the main switch is related to the structure design of manual operation when cutting off and connecting the rated or overload load, it is also impossible to directly convert the circuit. The main switch structure design of the transfer switch of the manual transfer operation mode adopts the switch product when cutting off and connecting the rated or overload load, which is not related to manual operation, and also has a short-term tolerance function of one second with high short-circuit performance. Therefore, when those circuits fail, it is safer and more reliable to install a manual operation conversion transfer switch in the power network that does not need to be converted to the normal circuit in an instant. The use and performance of the product are more superior, and it is still an indispensable product in the current market of intelligent automation development.

[0003] See also Figure 1 , Figure 2 At present, the commonly used manually operated transfer switch structures on the market all use two of the same isolating switches as the common switch and the spare switch installed on the left and right sides of the operating mechanism. As a result, the product's outer dimensions are very large, so that the switch cabinet manufacturers can only use a larger cabinet width when designing the cabinet, resulting in high manufacturing costs for the switch cabinet, which has caused great losses to the country's social benefits and economic development. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an operating mechanism for a manual transfer switch, which can change the common switch and the spare switch of the manual transfer switch from being installed on both sides of the operating mechanism in the current market to being installed on the upper and lower layers of the operating mechanism, and realize the function of alternately switching the common switch and the spare switch.

[0005] In order to achieve the above purpose. One object of the present invention is to provide an operating mechanism of a manual transfer switch, in order to be installed in coordination with the common switch and the standby switch of the transfer switch and to conform to the characteristics of manual transfer operation, the operating rotation angle range of the manual transfer operating mechanism should be: 90° 0° -90°.

[0006] In order to achieve the above purpose. One object of the present invention is to provide an operating mechanism for a manual transfer switch, which should be able to achieve: when the normal switch is operated, the standby switch should be in a static state; when the standby switch is operated, the normal switch should be in a static state. It should be possible to achieve that the working states of the normal switch and the standby switch in the two operation stages do not affect each other.

[0007] In order to achieve the above purpose. One object of the present invention is to provide an operating mechanism for a manual transfer switch, which should: 0° -90°. The closing position of the common switch and the standby switch should be "+90°" and "-90°" respectively, and the middle zero position should be the opening position of the common switch and the standby switch. That is, the double opening position of the manual transfer switch.

[0008] Compared with the prior art, the present invention has the advantages of compact structure, small size, high efficiency, labor-saving operation, and is particularly suitable for the mutual conversion of circuits and power grids with large capacity rated working currents in the current national power grid development. It can significantly reduce the manufacturing cost of switch cabinets and improve the country's economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a stereoscopic diagram of the main structure of a manual transfer switch in the prior art;

[0010] Figure 2 It is a structural stereogram of the operating mechanism of the manual transfer switch of the prior art;

[0011] Figure 3 A structural stereogram of a manual transfer switch using an operating mechanism of the manual transfer switch of the present invention;

[0012] Figure 4 It is a structural stereogram of an operating mechanism of a manual transfer switch of the present invention.

[0013] Figure 5 It is a structural stereogram of the operating mechanism in the first state;

[0014] Figure 6 It is a structural stereogram of the operating mechanism in the second state;

[0015] Figure 7 It is a structural stereogram of the operating mechanism in the third state;

[0016] Figure 8 It is a structural stereogram of the actuator of the present invention;

[0017] Fig. 9It is a structural stereogram of the bracket of the present invention;

[0018] Fig.10 It is a structural stereogram of the support plate of the present invention;

[0019] Fig.11 It is a structural stereogram of the connector of the present invention;

[0020] Fig.12 It is a structural stereogram of the gear of the present invention;

[0021] Fig.13 It is a structural stereogram of the circular shaft of the present invention;

[0022] The reference numerals in the figure are as follows: 1-operating mechanism, 2-common switch, 3-spare switch, 4-operating shaft, 5-mounting plate, 11-actuator, 12-bracket,

[0023] 13-support plate, 14-connector, 15-gear, 16-round shaft, 17-common transmission chain, 18-spare transmission chain, 111-square hole, 112-flat plate, 113-round step, 114-round hole, 114a-common group round hole, 114b-spare group round hole. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be pointed out that for ordinary technicians in this field, several modifications can be made without departing from the principle of the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

[0025] See attached Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 , as can be seen from the three-dimensional diagram of the operating mechanism of the manual transfer switch. The mechanism is composed of a bracket 12, two support plates 13, an actuator 11, two connectors 14, two gears 15 and eight round shafts 16. Among them, each connector 14 and each gear 15 can form a transmission chain of operating force, which together constitute two transmission chains of operating force of the operating mechanism 1, namely a common transmission chain 17 and a spare transmission chain 18. The two support plates 13 are installed on the upper and lower sides of the bracket 12. The actuator 11 and the two connectors 14 and the two gears 15 are all installed on the two support plates 13. The eight round shafts 16 are installed on the common group of circular holes 114a and the spare group of circular holes 114b of the two flat plates 112 of the actuator 11.

[0026] Reference Figure 8The actuator 11 is a hollow shaft with a square hole 111, and a flat plate 112 and a circular step 113 of the same structure and size are provided at both ends. The plane of the flat plate 112 is perpendicular to the axis of the hollow shaft of the square hole 111. The circular step 113 is concentric with the axis of the hollow shaft of the square hole 111. The two flat plates 112 are symmetrically distributed at both ends of the shaft, and are each provided with eight circular holes 114 of equal diameter. Each group of four circular holes 114 is divided into two groups, namely the common group circular holes 114a and the spare group circular holes 114b. The positions of the eight circular holes 114 are all on the central circumference of the hollow shaft of the square hole 111 of the actuator 11. The arcs between the four holes in each group are equal. The number of arcs between the center of the common group circular holes 114a and the spare group circular holes 114b is not an integer multiple of the number of arcs between the circular holes 114. The actuator 11 is manufactured by using powder metallurgy technology.

[0027] The operating shaft 4 of the manual transfer switch passes through the square hole 111 of the actuator 11 of the operating mechanism 1, and then is installed on the mounting plate 5 of the transfer switch; the common switch 2 and the standby switch 3 are respectively installed on the two mounting plates 5 in the off state, in a double-layer mirror-image superposition state, and the operating mechanism 1 is installed in the middle of the double layer, and the main shafts of the corresponding two switches are respectively inserted into the square holes of the two connectors 14 of the actuator 11 of the operating mechanism 1 so that the two gears 15 are in a double separation state. That is, when the actuator 11 is rotated to the "0" position, the square holes of the two connectors 14.

[0028] See attached Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7In the operating mechanism 1, the common transmission chain 17 and the spare transmission chain 18 composed of the gear 15 and the connector 14 can be connected and transmitted with the circular shaft 16 installed with the common group circular hole 114a and the spare group circular hole 114b of the actuator 11, respectively. The eight circular holes 114 of the actuator 11 and the eight installed circular shafts 16 are connected by sliding rotation. When the gear 15 and the circular shaft 16 are linked and transmitted, the friction between the gear 15 and the circular shaft 16 is greatly reduced due to the rotation and sliding of the circular shaft 16, thereby improving the execution efficiency of the operating force in the transmission chain. The above structure realizes that the two main switches of the manual transfer switch, namely, the common switch 2 and the spare switch 3, are installed on the upper and lower sides of the operating mechanism respectively instead of being installed on the left and right sides of the operating mechanism in the current market. The product's external dimensions are greatly reduced. Thus, the installation space of the manual transfer switch in the switch cabinet is saved. The manufacturing cost of the switch cabinet is reduced. In addition, due to the improvement of the execution efficiency of the actuator 11 in the transmission chain, the operating force of the switch can be saved, thereby also improving the operating performance of the conversion switch. When the common switch 2 is manually operated, the actuator 11 rotates 90° clockwise, that is, from 0°→90°, which can drive the common transmission chain 17 to rotate 90° clockwise, that is, the connector 14 in the common transmission chain 17 rotates 90° clockwise, that is, 0°→90°. Conversely, when the actuator 11 rotates 90° counterclockwise, that is, from the 90° position to the 0° position, it can drive the common transmission chain 17 to rotate -90°, that is, the connector 14 in the common transmission chain 17 rotates 90° counterclockwise, and returns from the 90° position to the 0° position. In the above operation process, the state of the common switch 2 operated by the operating mechanism 1 changes from opening to closing. Then the switch is returned from closing to opening. At the same time, the four round shafts 16 installed in the spare group circular holes 114b of the actuator 11 of the operating mechanism 1 are separated from the spare transmission chain 18 and have no effect on the spare transmission chain 18. In the above process, the spare transmission chain 18 is in a stationary state, and at the same time, the corresponding spare switch 3 is also in a stationary state. According to the above process, it can be concluded by the same logic. When the standby switch 3 is operated manually, the actuator 11 of the operating mechanism 1 is operated 90° counterclockwise, that is, from 0°→90°, and the connector 14 in the spare transmission chain 18 is also rotated 90° counterclockwise, that is, 0°→-90°, and the state returns to operation, that is, -90°→0°, and the connector 14 in the spare transmission chain 18 is rotated 90° clockwise, that is, -90°→0°. In this process, the state of the standby switch 3 changes from open to closed, and then from closed to open; in addition, the four circular shafts 16 installed in the common group circular holes 114a of the actuator 11 are separated from the common transmission chain 17. The common transmission chain 17 is in a static state, and the corresponding common switch 2 is also in a static state. In the above two intervals of the human power operating the common switch 2 and the standby switch 3 respectively, that is, the common switch 2 is in the "0° 90°" interval operation and backup switch 3 at "0° -90°" range. During the operation, the operating mechanism 1 realizes the 180-degree working range of manual conversion operation. And completes the "+90° 0° -90°" range, so that when the operating mechanism 1 operates the common switch 2, the standby switch 3 is stationary, and when the standby switch 3 is operated, the common switch 2 is stationary. The two switches are independent in their own working ranges and do not affect each other, and also achieve "+90° 0° The working requirements for the endpoint positions within the range of -90°. That is, the position of "+90°" is the closed state of the common switch 2, the position of "-90°" is the closed state of the backup switch 3, and the position of "0°" is the double open state of the common switch 2 and the backup switch 3.

Claims

1. An operating mechanism of a manual transfer switch, comprising an actuator (11), a bracket (12), a support plate (13), a connector (14), a gear (15), and a round shaft (16), wherein the support plate (13) is mounted on the bracket (12), the actuator (11), the connector (14), and the gear (15) are all mounted on the support plate (13), and the round shaft (16) is mounted on a flat plate (112) of the actuator (11), characterized in that: The actuator (11) is a hollow shaft with a square hole (111), and a flat plate (112) and a circular step (113) of the same structure and equal size are arranged at both ends. The plane of the flat plate (112) is perpendicular to the axial direction of the hollow shaft of the square hole (111), the center of the circular step (113) is perpendicular to the axial direction of the hollow shaft of the square hole (111), the center of the circular step (113) is the same as the axial center of the hollow shaft of the square hole (111), and the two flat plates (112) are symmetrically distributed at the two ends of the shaft; the circular shaft (16) is installed on the two flat plates (11 2) and can rotate; wherein: a plurality of circular holes (114) are arranged on the two flat plates (112) of the actuator (11), and these circular holes (114) are divided into two groups, namely, a common group of circular holes (114a) and a spare group of circular holes (114b), and the positions of these circular holes (114) are all on the circumference of the center of the hollow shaft of the square hole (111) of the actuator (11), and the number of arc degrees of the center of the common group of circular holes (114a) and the spare group of circular holes (114b) are not an integral multiple of the number of arc degrees of the center of the circular holes (114).

2. The operating mechanism of a manual transfer switch according to claim 1, characterized in that: The two flat plates (112) of the actuator (11) are each provided with eight circular holes (114) of equal diameter, with four circular holes (114) forming a group, and the two groups in total are the common group of circular holes (114a) and the standby group of circular holes (114b).

3. The operating mechanism of a manual transfer switch according to claim 1, characterized in that: Two connectors (14) and two gears (15) are respectively mounted on the support plate (13), wherein one connector (14) and one gear (15) can form a transmission chain of operating force, and together form two transmission chains of operating force of the operating mechanism, namely a common transmission chain (17) and a spare transmission chain (18).

4. The operating mechanism of a manual transfer switch according to claim 2, characterized in that: Among the eight circular holes (114) provided on the flat plate (112), the four circular holes (114) in each group of the common group circular holes (114a) and the spare group circular holes (114b) have the same arc distance between the centers of the circles; and the actuator (11) is manufactured by powder metallurgy technology.

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