Intermittent spring locking mechanism

Abstract

The invention discloses an intermittent spring locking mechanism which comprises a locking disc, a positioning plate, a spring, a supporting pin, a spring hanging pin, a spring hanging shaft and a rolling sleeve, the supporting pin and the spring hanging pin are arranged on the positioning plate, the spring hanging shaft is arranged on a main shaft fixing plate, the rolling sleeve is rotatably installed on the supporting pin, the locking disc is fixedly installed on a main shaft of an operating mechanism, and the positioning plate is rotatably installed on the main shaft fixing plate. A notch-shaped positioning groove is formed in the circumferential edge of the locking disc, the rolling sleeve can roll along the circumferential edge of the locking disc, the supporting pin and the spring hanging pin are located on the same side of a rotating point of the positioning plate, and the two ends of the spring are connected to the spring hanging pin and the spring hanging shaft in a hung mode respectively. According to the invention, the positioning and locking of programmed and automatic operation among a plurality of components in the switch cabinet can be realized, the structure is compact, the size is small, the performance is stable, the installation, operation, maintenance, disassembly and replacement are convenient, and the practicability is high. Accurate positioning of the multi-station programmed operating mechanism of the intelligent switch cabinet after sequential operation according to a specified program is ensured, and a locking function is realized.

Description

Technical Field

[0001] The present invention relates to an intermittent spring locking mechanism for positioning and locking a multi-station programmed operating mechanism of an intelligent switchgear cabinet. Background Art

[0002] The intelligent switchgear cabinet has changed the concept of the traditional switchgear cabinet and has the characteristics of multi-function, digitalization, networking, intelligence, compact structure, easy maintenance, etc. It can meet the future needs of the power industry and has many advantages such as preventing / avoiding accidents, reducing equipment maintenance and repair time, and realizing data resource sharing.

[0003] The basis for the switchgear cabinet to achieve intelligence is first the electrification of the switchgear cabinet operation. For a fixed switchgear cabinet, its typical scheme includes that the upper disconnector, upper earthing switch, lower disconnector, and lower earthing switch must all achieve electric operation, so that the intelligence of the switchgear cabinet can be better realized. In order to ensure the intelligent operation of the fixed switchgear cabinet and realize the programmed and electric operation among multiple components in the switchgear cabinet, a multi-station programmed operating mechanism has emerged. The multi-station programmed operating mechanism needs to integrate the sequence of the prior operations of the disconnector and the earthing switch to achieve sequential control of the electric operation. It should not only support the intelligence of electrical equipment, monitor electrical parameters such as voltage, current, and power of the power supply and distribution circuit of the mechanism, and cooperate with various remote monitoring software, etc., but also support the manual operation during the commissioning, maintenance, and repair of the switchgear cabinet. At the same time, in a fixed switchgear cabinet, the disconnector and the earthing switch should have a closing position, an isolating (opening) position, and an earthing position. This requires that the operating mechanism also has multiple positions and meets the requirements of the electrical performance of each position: for example, when the disconnector is in the closing position to connect the circuit, it should not only carry the rated current, but also be able to carry the rated short-time withstand current and the rated peak withstand current at any time; in the opening (isolating) position, it isolates the power supply and forms an obvious break; when the earthing switch is in the earthing (closing) position, it releases the residual charge and maintains zero-potential earthing protection. In some places, it may also need to carry the rated short-time withstand current and the rated peak withstand current; when the earthing switch is in the opening position, it maintains a stable position to prevent misclosing of the earthing switch.

[0004] Whether it is the disconnector or the earthing switch in the opening position, it must be reliably isolated from the power supply to form an obvious break to ensure the safety of maintenance personnel and equipment; in the closing position, it can withstand the impact of the short-time withstand current and the rated peak withstand current, as well as the shock / vibration and impact from nature without being damaged. That is to say, the operating mechanisms of the disconnector and the earthing switch should have an accurate positioning function to ensure the accurate closing and opening positions, and at the same time, they need to be locked in the closing and opening positions to prevent misoperation from causing equipment damage accidents.

[0005] Intelligent switch cabinets require the use of multi-station programmed operating mechanisms, which not only have electric operation functions but also need to implement unmanned operation. When the mechanism operates automatically in the clockwise and counterclockwise directions, it is necessary to achieve the positioning and locking of the multi-station programmed mechanism. Summary of the Invention

[0006] The purpose of the present invention is to provide an intermittent spring locking mechanism that can achieve the positioning and locking of programmed and automatic operation among multiple components in an intelligent switch cabinet.

[0007] The purpose of the present invention is achieved through the following technical measures: An intermittent spring locking mechanism, characterized in that it includes a locking disc, a positioning plate, a spring, a support pin and a spring hanging pin arranged on the positioning plate, a spring hanging shaft arranged on the main shaft fixing plate, and a rolling sleeve rotatably installed on the support pin. The locking disc is fixedly installed on the main shaft of the operating mechanism and can rotate synchronously with the main shaft. The positioning plate is rotatably installed on the main shaft fixing plate. A notch-shaped positioning groove is provided on the circumferential edge of the locking disc. The rolling sleeve can roll along the circumferential edge of the locking disc. The support pin and the spring hanging pin are both located on the same side of the rotation point of the positioning plate. The two ends of the spring are respectively hung on the spring hanging pin and the spring hanging shaft. The elastic restoring force of the spring causes the rolling sleeve to always remain in contact with the circumferential edge of the locking disc during the rotation of the locking disc, and when the rolling sleeve falls into the positioning groove, it positions and locks the main shaft.

[0008] The present invention can achieve the positioning and locking of programmed and automatic operation among multiple components in the switch cabinet, realize unmanned operation, meet the requirements of intelligent switch cabinets. Moreover, the present invention has a compact structure, small volume, and stable performance, and is convenient for installation, operation, maintenance, disassembly and replacement. It can ensure the accurate positioning of the multi-station programmed operating mechanism of the intelligent switch cabinet after sequential operation according to the specified procedure, and achieve the locking function, which can prevent accidents caused by misoperation of the switch devices in the switch cabinet and equipment damage.

[0009] The spring of the present invention is located outside the main shaft fixing plate. The positioning plate and the locking disc are located inside the main shaft fixing plate. An opening is provided on the main shaft fixing plate. The spring hanging pin passes through the opening and is connected to the spring.

[0010] There are four positioning grooves in the present invention and they are evenly distributed along the circumference of the locking plate.

[0011] The positioning plate of the present invention is a long plate body. A pin shaft is provided on the main shaft fixing plate. One end of the positioning plate is rotatably installed on the pin shaft. A positioning sleeve is provided on the pin shaft and located between the positioning plate and the main shaft fixing plate. The support pin is located in the middle of the positioning plate, and the spring hanging pin is located at the other end of the positioning plate.

[0012] The circumferential edge of the locking disc described in the present invention is a smoothly transitioning curve, which enables the operating mechanism to rotate flexibly without jamming and can reduce the wear between the outer circle of the locking disc and the rolling sleeve.

[0013] The thickness of the rolling sleeve described in the present invention is greater than the thickness of the locking disc.

[0014] Compared with the prior art, the present invention has the following remarkable effects:

[0015] ⑴ The present invention can achieve the positioning and locking of programmed and automated operation among multiple components in the switch cabinet, enabling unmanned operation and meeting the requirements of intelligent switch cabinets.

[0016] ⑵ The structure of the present invention is compact, with a small volume and stable performance. It is convenient for installation, operation, maintenance, disassembly and replacement. It can ensure the accurate positioning of the multi-station programmed operating mechanism of the intelligent switch cabinet after sequential operation according to the specified procedure and realize the locking function, preventing accidents caused by misoperation of the switch devices in the switch cabinet and equipment damage.

[0017] ⑶ Under the action of the spring force, the rolling sleeve installed on the support pin is always in contact with the outer circle of the positioning and locking disc. The outer circle of the locking disc is designed as a smoothly transitioning curve, enabling the mechanism to rotate flexibly without jamming and reducing the wear between the outer circle of the locking disc and the rolling sleeve.

[0018] ⑷ The structure of the present invention is simple, with low cost and strong practicability, and is suitable for wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0020] Figure 1 is the front view of the present invention applied to the operating mechanism;

[0021] Figure 2 is the top view of the present invention applied to the operating mechanism;

[0022] Figure 3 is the side view of the present invention applied to the operating mechanism;

[0023] Figure 4 is the top sectional view of the present invention;

[0024] Figure 5 is the working schematic diagram of the present invention;

[0025] Figure 6 is the installation schematic diagram of the hanging spring shaft of the present invention;

[0026] Figure 7 is the structural schematic diagram of the positioning plate of the present invention;

[0027] Figure 8It is a schematic installation diagram of the positioning plate of the present invention;

[0028] Figure 9 It is a schematic structural diagram of the locking disc of the present invention.

[0029] In the figure: 1 - hanging spring shaft, 2 - spring, 3 - positioning plate, 3.1 - hanging spring pin, 3.2 - support pin, 4 - rolling sleeve, 5 - locking disc, 5.1 - positioning groove, 6 - positioning sleeve, 7 - pin shaft, 8 - main shaft fixing plate, 9 - main shaft, 10 - opening. Specific embodiments

[0030] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1 to 9 shown, it is an intermittent spring locking mechanism of the present invention, including a locking disc 5, a positioning plate 3, a spring 2, a support pin 3.2 and a hanging spring pin 3.1 arranged on the positioning plate 3, a hanging spring shaft 1 arranged on the main shaft fixing plate 8, and a rolling sleeve 4 rotatably installed on the support pin 3.2. The locking disc 5 is fixedly installed on the main shaft 9 of the operating mechanism and can rotate synchronously with the main shaft 9. The positioning plate 3 is a long plate body. A pin shaft 7 is provided on the main shaft fixing plate 8. One end of the positioning plate 3 is rotatably installed on the pin shaft 7. Four notch-shaped positioning grooves 5.1 are evenly distributed on the circumferential edge of the locking disc 5, and the circumferential edge of the locking disc 5 is a smoothly transitioned curve. The rolling sleeve 4 can roll along the circumferential edge of the locking disc 5. The support pin 3.2 is located in the middle of the positioning plate 3, and the hanging spring pin 3.1 is located at the other end of the positioning plate 3, that is, both the hanging spring pin 3.1 and the support pin 3.2 are on the same side of the rotation point of the positioning plate 3. The two ends of the spring 2 are respectively hooked on the hanging spring pin 3.1 and the hanging spring shaft 1. The elastic restoring force of the spring 2 causes the rolling sleeve 4 to always be in contact with the circumferential edge of the locking disc 5 during the rotation of the locking disc 5, and positions and locks the main shaft 9 when the rolling sleeve 4 falls into the positioning groove 5.1.

[0032] The main shaft fixing plate 8 of the present invention refers to the fixing plate used to install the main shaft 9 of the multi-station programmed operating mechanism in the intelligent switch cabinet. Figure 1 As can be seen, there is a fixing plate on each side of the main shaft 9. Here, the main shaft fixing plate 8 refers to the left fixing plate.

[0033] In this embodiment, the spring 2 is located outside the main shaft fixing plate 8, and the positioning plate 3 and the locking disc 5 are located inside the main shaft fixing plate 8. An opening 10 is provided on the main shaft fixing plate 8. The spring hanging pin 3.1 passes through the opening 10 and is connected to the spring 2. As the rolling sleeve 4 rolls along the circumferential edge of the locking disc 5, the spring hanging pin 3.1 moves up and down, and the opening 10 satisfies the movement stroke of the spring hanging pin 3.1.

[0034] The installation process of the present invention is as follows:

[0035] As Figure 6 shown, the spring hanging shaft 2 is fixedly installed on the left side plate of the multi-station programmed operating mechanism of the intelligent switch cabinet; as Figure 7 shown, the spring hanging pin 3.1 and the support pin 3.2 are welded on the positioning plate 3; as Figure 8 shown, the pin shaft 7 is fixedly installed on the left side plate of the multi-station programmed operating mechanism of the intelligent switch cabinet. The positioning plate 3, the positioning sleeve 6 and the pin shaft 7 are installed in cooperation. The positioning plate 3 takes the pin shaft 7 as the center and can rotate around the pin shaft 7; the rolling sleeve 4 is installed in cooperation with the support pin 3.2, and the rolling sleeve 4 takes the support pin 3.2 as the center and can freely rotate around the support pin 3.2. As Figure 9 shown, four identical positioning grooves 5.1 are evenly arranged on the locking disc 5. It is installed on the main shaft of the multi-station programmed operating mechanism of the intelligent switch cabinet and rotates together with the main shaft of the multi-station operating mechanism. The outer circle of the locking disc 5 is designed as a smoothly transitioned curve, enabling the mechanism to rotate flexibly without jamming, and reducing the wear of the outer circle of the main shaft positioning locking disc 5 and the rolling sleeve 4. Figure 3 、 Figure 4 、 Figure 5 shown, the spring 2 is hung between the spring hanging shaft 1 and the support pin 3.2. Under the action of the spring force, the rolling sleeve 4 installed on the support pin 3.2 always contacts the outer circle of the positioning locking disc 5 and rolls on the outer circle of the positioning locking disc 5 while freely rotating around the support pin 3.2, realizing the flexible rotation of the mechanism and reducing the wear of the outer circle of the main shaft positioning locking disc 5 and the rolling sleeve 4.

[0036] The working process of the present invention is as follows:

[0037] As Figure 3 、 Figure 5As shown, when the main shaft of the multi-station programmed operating mechanism of the intelligent switchgear rotates counterclockwise, the main shaft drives the locking disc 5 to rotate counterclockwise together. Every time the main shaft rotates 90°, the rolling sleeve falls into one of the four positioning grooves 5.1 on the locking disc 5. At this time, the operation of one station is completed. Under the action of the spring force, the locking disc 5 positions and locks the main shaft of the mechanism. Within the control range of the spring force, the main shaft of the mechanism is positioned and locked. Overcoming the action of the spring force, continue to drive the main shaft to rotate counterclockwise. The main shaft rotates another 90°, and the rolling sleeve 4 falls into another one of the four evenly arranged positioning grooves 5.1 on the locking disc 5. At this time, the operation of another station is completed. Within the control range of the spring force, the main shaft of the mechanism is positioned and locked. In this way, the main shaft can rotate 360° counterclockwise. On the contrary, driving the main shaft to rotate clockwise can also sequentially complete the main shaft rotating 360° clockwise. The locking disc 5 positions and locks the main shaft of the mechanism under the action of the spring force. Within the control range of the spring force, the main shaft of the mechanism is positioned and locked. When there is no other restriction in the present invention, it can continuously rotate clockwise, rotate 90°, and then intermittently; or it can continuously rotate counterclockwise, rotate 90°, and then intermittently.

[0038] In this example, restricted by the multi-station programmed operating mechanism, four positioning grooves are evenly arranged on the main shaft positioning locking disc. The positioning locking disc rotates clockwise, and after rotating 360° intermittently every 90°, it rotates counterclockwise, and rotates 360° intermittently every 90° to complete an operation cycle. It can also rotate 90° clockwise, then intermittently, and then rotate 90° counterclockwise, intermittently to complete the operation of one station.

Claims

1. An intermittent spring locking mechanism, characterized in that: The invention comprises a locking plate, a positioning plate, a spring, a supporting pin and a spring pin arranged on the positioning plate, a spring shaft arranged on a main shaft fixing plate and a rolling sleeve rotatably mounted on the supporting pin. The locking plate is fixedly mounted on the main shaft of the operating mechanism and can rotate synchronously with the main shaft. The positioning plate can be rotatably mounted on the main shaft fixing plate. A notch-shaped positioning groove is provided on the circumferential edge of the locking plate. The rolling sleeve can roll along the circumferential edge of the locking plate. The supporting pin and the spring pin are both located on the same side of the rotation point of the positioning plate. The two ends of the spring are respectively hung on the spring pin and the spring shaft. The elastic restoring force of the spring ensures that the rolling sleeve always keeps in contact with the circumferential edge of the locking plate during the rotation of the locking plate, and positions and locks the main shaft when the rolling sleeve falls into the positioning groove.

2. The intermittent spring locking mechanism according to claim 1, characterized in that: There are four positioning grooves which are evenly distributed along the circumference of the locking plate.

3. The intermittent spring locking mechanism according to claim 2, characterized in that: The circumferential edge of the locking disk is a curve with a smooth transition.

4. The intermittent spring locking mechanism according to claim 3, characterized in that: The spring is located on the outer side of the spindle fixing plate, the positioning plate and the locking plate are located on the inner side of the spindle fixing plate, an opening is provided on the spindle fixing plate, and the hanging spring pin passes through the opening and is connected with the spring.

5. The intermittent spring locking mechanism according to claim 4, characterized in that: The positioning plate is a long plate body, and a pin is provided on the spindle fixing plate. One end of the positioning plate is rotatably mounted on the pin. A positioning sleeve is provided on the pin and between the positioning plate and the spindle fixing plate. The support pin is located in the middle of the positioning plate, and the hanging spring pin is located at the other end of the positioning plate.

6. The intermittent spring locking mechanism according to claim 5, characterized in that: The thickness of the rolling sleeve is greater than the thickness of the locking plate.

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