Operating mechanism output connecting device and high-voltage switch

Abstract

The invention relates to the field of devices for controlling on-off of circuits, in particular to an operating mechanism output connecting device and a high-voltage switch. The operating mechanism output connecting device comprises a mechanism connector used for being fixedly connected with an output shaft of an operating mechanism and a connecting rod connector used for being fixedly connected with a connecting rod of a switch body, and the mechanism connector comprises a connecting sleeve used for being fixedly connected with the output shaft and a sleeve connecting disc arranged at the end, away from the mechanism, of the connecting sleeve. The connecting rod connector comprises a transmission shaft and a shaft connecting disc arranged at the end, close to the sleeve connecting plate, of the transmission shaft, the shaft connecting disc is restrained on the sleeve connecting disc in the axial direction through a pressing plate, the pressing plate is fixedly connected with the sleeve connecting disc through a fastening bolt, and the shaft connecting disc can rotate in the space defined by the pressing plate and the sleeve connecting disc. The pressing plate is provided with a jacking screw used for jacking and fixing the shaft connecting disc. The operating mechanism output connecting device solves the problem that the operating mechanism and the switch body are inconvenient to connect.

Description

Technical Field

[0001] The invention relates to the field of devices for controlling the on-off of circuits, and in particular to an operating mechanism output connection device and a high-voltage switch. Background Art

[0002] High-voltage switchgear such as high-voltage disconnectors and circuit breakers use the corresponding operating mechanism as the power source when working. The operating mechanism generally outputs power and action through the output shaft, where the action is a rotational action. The body of the high-voltage switch is connected to the output shaft of the operating mechanism through a connecting rod. When the output shaft of the operating mechanism rotates, the connecting rod is driven to rotate synchronously, and finally the rotation of the output shaft is converted into the opening and closing movement of the moving contact of the high-voltage switch.

[0003] In traditional high-voltage switches, the connection between the connecting rod and the output shaft of the operating mechanism is often achieved by clamping, relying on the friction between the clamp and the output shaft to achieve relative fixation between the two. However, when the power of the high-voltage switch is large, in order to meet the requirements of its opening and closing speed, the torque required to be transmitted between the output shaft of the operating mechanism and the connecting rod will increase sharply, and there will be a strong movement impact at the connection between the two. In this case, transmission deformation or misalignment of the connecting rod may occur.

[0004] A Chinese utility model patent with authorization announcement number CN201364827Y and authorization announcement date December 16, 2009 discloses a sealing structure for the output shaft of an operating mechanism of an isolating switch. The patent specification specifically discloses a connection structure between the output shaft of the operating mechanism and a connecting rod. The connection structure is specifically as follows: a joint is installed on the output shaft of the operating mechanism, and the joint is a flange joint, including a connecting sleeve and a joint flange. The connecting sleeve is sleeved on the output shaft of the operating mechanism, and a key groove is arranged on the inner wall surface thereof. A key groove corresponding to the key groove on the connecting sleeve is arranged on the output shaft of the operating mechanism, and the connecting sleeve and the output shaft of the operating mechanism are anti-rotationally matched by a round head key; a connecting rod flange corresponding to the joint flange of the flange joint is arranged on the connecting rod of the isolating switch. When in use, the connecting rod flange and the joint flange are connected by fastening bolts, thereby realizing the transmission of the action of the operating mechanism to the switch body of the isolating switch. Since the connecting sleeve and the output shaft of the operating mechanism are key-fitted, and the joint flange and the connecting rod flange are connected by fastening bolts, the reliability and accuracy of the transmission can be guaranteed and the position dislocation of the connecting rod can be avoided.

[0005] The connection structure disclosed in the above patent solves the problems of transmission reliability and accuracy. However, when connecting the operating mechanism to the switch body, in order to ensure the opening and closing positions of its moving contacts, a specific phase relationship is required between the connecting rod and the output shaft of the operating mechanism, that is, the rotation angle between the connecting rod and the output shaft is required accordingly. Since the joint and the connecting rod are flange-connected, it is impossible to achieve stepless adjustment of the phase between the joint and the connecting rod. Once the position of the flange connection hole does not correspond to the relative position of the connecting rod and the operating mechanism, it will cause great inconvenience to the connection between the operating mechanism and the switch body. Summary of the invention

[0006] The object of the present invention is to provide an operating mechanism output connection device to solve the problem of inconvenient connection between the operating mechanism and the switch body.

[0007] At the same time, the purpose of the present invention is also to provide a high-voltage switch including the above-mentioned operating mechanism output connection device to solve the above-mentioned problem.

[0008] In order to solve the above problems, the output connecting device of the operating mechanism of the present invention adopts the following technical scheme: the output connecting device of the operating mechanism includes a mechanism joint for fixedly connected to the output shaft of the operating mechanism and a connecting rod joint for fixedly connected to the connecting rod of the switch body, the mechanism joint includes a connecting sleeve for fixedly connected to the output shaft and a sleeve connecting disk arranged at an end of the connecting sleeve away from the mechanism, the connecting rod joint includes a transmission shaft and a shaft connecting disk arranged at an end of the transmission shaft close to the sleeve connecting plate, the shaft connecting disk is axially constrained to the sleeve connecting disk by a pressure plate, the pressure plate and the sleeve connecting disk are fixedly connected by fastening bolts, the shaft connecting disk can rotate in the space enclosed by the pressure plate and the sleeve connecting disk, and a tightening screw for tightening and fixing the shaft connecting disk is installed on the pressure plate.

[0009] Furthermore, the pressing plate is an annular pressing plate, and a support platform for supporting and cooperating with the sleeve connecting disk is provided at the edge of the annular pressing plate.

[0010] Furthermore, the support platform is an annular support platform.

[0011] Furthermore, the fastening bolt passes through the supporting platform.

[0012] Furthermore, a keyway for cooperating with a key provided on the output shaft or a key for cooperating with a keyway provided on the output shaft is provided on the inner wall of the connecting sleeve.

[0013] Furthermore, a welding groove is provided at one end of the connecting sleeve away from the sleeve connecting plate.

[0014] Furthermore, the connecting rod joint also includes a plug-in sleeve that cooperates with the transmission shaft to prevent rotation.

[0015] Furthermore, the transmission shaft is a spline shaft, and the plug-in sleeve is a spline sleeve that matches the spline shaft.

[0016] Furthermore, a welding groove is arranged at one end of the plug-in sleeve away from the shaft connecting plate.

[0017] Beneficial effects: The operating mechanism output connection device of the present invention is an improved invention. Specifically, the operating mechanism output connection device of the present invention is provided by setting a sleeve connection disk at one end of the connecting sleeve of the mechanism joint, and setting a shaft connection disk at one end of the transmission shaft of the connecting rod joint. The pressure plate only plays the role of axially constraining the shaft connection disk without directly pressing it. During installation, the relative rotation angle between the shaft connection disk and the sleeve connection disk can be arbitrarily and infinitely adjusted according to the position requirements, thereby achieving the purpose of adjusting the relative rotation angle between the connecting rod and the output shaft of the operating mechanism. After the adjustment is completed, the shaft connection disk can apply a clamping force to the sleeve connection disk through the tightening screw. After calculation, the holding force between the shaft connection disk and the sleeve connection disk can be satisfied by configuring the number of tightening screws. In summary, it can be seen that the operating mechanism output connection device of the present invention solves the problem of inconvenient connection between the operating mechanism and the switch body.

[0018] The high voltage switch of the present invention adopts the following technical solutions: The high-voltage switch includes a switch body and an operating mechanism, an output connecting device is connected to the output shaft of the operating mechanism, the output connecting device includes a mechanism joint for fixedly connected to the output shaft of the operating mechanism and a connecting rod joint for fixedly connected to the connecting rod of the switch body, the mechanism joint includes a connecting sleeve for fixedly connected to the output shaft and a sleeve connecting disk arranged at an end of the connecting sleeve away from the mechanism, the connecting rod joint includes a transmission shaft and a shaft connecting disk arranged at an end of the transmission shaft close to the sleeve connecting plate, the shaft connecting disk is axially constrained to the sleeve connecting disk by a pressure plate, the pressure plate and the sleeve connecting disk are fixedly connected by fastening bolts, the shaft connecting disk can rotate in a space enclosed by the pressure plate and the sleeve connecting disk, and a tightening screw for tightening and fixing the shaft connecting disk is installed on the pressure plate.

[0019] Furthermore, the pressing plate is an annular pressing plate, and a support platform for supporting and cooperating with the sleeve connecting disk is provided at the edge of the annular pressing plate.

[0020] Furthermore, the support platform is an annular support platform.

[0021] Furthermore, the fastening bolt passes through the supporting platform.

[0022] Furthermore, a keyway for cooperating with a key provided on the output shaft or a key for cooperating with a keyway provided on the output shaft is provided on the inner wall of the connecting sleeve.

[0023] Furthermore, a welding groove is provided at one end of the connecting sleeve away from the sleeve connecting plate.

[0024] Furthermore, the connecting rod joint also includes a plug-in sleeve that cooperates with the transmission shaft to prevent rotation.

[0025] Furthermore, the transmission shaft is a spline shaft, and the plug-in sleeve is a spline sleeve that matches the spline shaft.

[0026] Furthermore, a welding groove is arranged at one end of the plug-in sleeve away from the shaft connecting plate.

[0027] Beneficial effects: The high-voltage switch of the present invention is an improved invention. Specifically, in the high-voltage switch of the present invention, the output connection device of the operating mechanism is provided by setting a sleeve connection disk at one end of the connecting sleeve of the mechanism joint, and setting a shaft connection disk at one end of the transmission shaft of the connecting rod joint. The pressure plate only plays the role of axially constraining the shaft connection disk without directly pressing it. During installation, the relative rotation angle between the shaft connection disk and the sleeve connection disk can be arbitrarily and infinitely adjusted according to the position requirements, thereby achieving the purpose of adjusting the relative rotation angle between the connecting rod and the output shaft of the operating mechanism. After the adjustment is completed, the shaft connection disk can apply a clamping force to the sleeve connection disk through the tightening screw. After calculation, the holding force between the shaft connection disk and the sleeve connection disk can be satisfied by configuring the number of tightening screws. In summary, it can be seen that the high-voltage switch of the present invention solves the problem of inconvenient connection between the operating mechanism and the switch body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the output connection device of the operating mechanism of the present invention.

[0029] In the figure: 1. connecting rod; 2. plug-in sleeve; 3. transmission shaft; 4. tightening screw; 5. fastening bolt; 6. pressure plate; 7. mechanism joint; 8. output shaft; 9. operating mechanism. DETAILED DESCRIPTION

[0030] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0031] When the flange connection structure is used as a transmission connection structure for rotary motion, it has the characteristics of reliable transmission and excellent synchronization at both ends, but it also has its inherent defects, that is, the flange connection holes provided on the two mutually connected flanges must be arranged at intervals around the circumference of the flanges. When the relative rotation angle of the two flanges needs to be adjusted, it must be done in a "stepping" form according to the set angle. In the high-voltage switch, the relative angle adjustment required between the connecting rod 1 of the switch body and the output shaft 8 of the operating mechanism 9 is often fine-tuning. When the flange connection structure is adopted, it will be difficult to meet the adjustment requirements. Based on the above problems, the operating mechanism output connection device of the present invention is still based on the basic concept of "disc to disc" connection, but it is to ensure the reliable fixation between the two by applying pressure between the discs. When the relative rotation angle between the two discs needs to be adjusted, it will not be restricted by any structure, so that the connection requirements between the output shaft of the operating mechanism of the high-voltage switch and the connecting rod on the switch body can be met, and its installation efficiency can be improved.

[0032] Based on the above inventive concept, as a basic implementation of the output connection device of the operating mechanism of the present invention, as Figure 1 As shown, the operating mechanism output connection device of the present invention includes a mechanism joint 7, a connecting rod joint, a pressure plate 6 and a tightening screw 4.

[0033] When in use, the mechanism joint 7 is connected to the output shaft 8 of the operating mechanism 9, receives the rotational motion of the output shaft 8, and rotates synchronously with the output shaft 8. In order to achieve the connection with the output shaft 8, the mechanism joint 7 includes a connecting sleeve. When in use, the connecting sleeve is sleeved on the output shaft 8. The fixing method between the two can be interference fit fixing, or can be other fixing methods such as thread fixing. As a preferred embodiment, Figure 1 As shown, in some embodiments, the connecting sleeve is fixed to the output shaft of the operating mechanism by welding. In order to facilitate welding, a welding groove is provided at one end of the connecting sleeve, and the welding groove can also play a role in increasing the strength of the welding position. Of course, the welding groove is not a necessary structure for the welding process. In some embodiments, the end port of the connecting sleeve can also be a flat port. In this case, it can still be welded and fixed to the output shaft.

[0034] In order to ensure that sufficient torque can be transmitted, such as Figure 1 As shown, in some preferred embodiments, a keyway is provided on the inner wall of the connecting sleeve, and the keyway can be matched with the key provided on the output shaft 8 of the operating mechanism 9; of course, as an equivalent structure, in some embodiments, when a keyway is provided on the output shaft 8 of the operating mechanism 9, a key can also be provided on the inner wall of the connecting sleeve to match the keyway on the output shaft 8. Regardless of which of the above structures is adopted, the cross-sectional size, length and number of the key can be designed to meet the requirements of torque transmission.

[0035] In order to cooperate with the connecting rod joint, a sleeve connecting plate is provided at one end of the connecting sleeve. Figure 1 In the illustrated embodiment, the sleeve connection plate adopts a flange structure, and a flange connection hole is provided on the sleeve connection plate, and the flange connection hole can be used to penetrate the fastening bolt 5 to connect the pressure plate 6. Of course, in some other embodiments, the flange connection hole on the sleeve connection plate can also be set as a threaded hole, in which case it can still cooperate with the fastening bolt to achieve connection with the pressure plate 6 and fix the pressure plate.

[0036] When in use, the connecting rod joint is connected to the connecting rod 1 of the switch body of the high-voltage switch, and is used to drive the connecting rod 1 of the switch body to rotate. As a typical structure, the connecting rod joint includes a transmission shaft 3, which is used to connect to the connecting rod 1. A shaft connecting disk is provided at one end of the transmission shaft 3. The shaft connecting disk is a disk and is coaxially arranged with the transmission shaft 3. During production, the shaft connecting disk and the transmission shaft 3 can be integrated, or the shaft connecting disk and the transmission shaft 3 can be made separately and then welded and fixed. Figure 1 In the illustrated embodiment, the shaft connecting disc is integrated with the transmission shaft 3 .

[0037] The diameter of the shaft connecting plate is smaller than the diameter of the sleeve connecting plate. More specifically, the radius of the shaft connecting plate is smaller than the distance from the vertex on one side of each flange connecting hole on the sleeve connecting plate close to the center of the sleeve connecting plate to the center of the sleeve connecting plate. Therefore, when the fastening bolt 5 is installed in the flange connecting hole of the sleeve connecting plate, the fastening bolt 5 will not interfere with the shaft connecting plate, thereby providing conditions for the shaft connecting plate to rotate relative to the sleeve connecting plate.

[0038] The function of the pressure plate 6 is to connect with the sleeve connection plate and provide axial constraints on the shaft connection plate, but not to compress the shaft connection plate, so that after the pressure plate 6 is installed and fixed by the fastening bolts 5, the shaft connection plate can still rotate in the cavity surrounded by the pressure plate 6 and the sleeve connection plate, thereby realizing the adjustment of its rotation angle position. In order to more conveniently achieve the above purpose, as Figure 1 As shown, in some preferred embodiments, a support platform is provided on the side of the pressing plate 6 facing the sleeve connection plate, and the height of the support platform is greater than the thickness of the shaft connection plate. In order to further ensure uniform support of all parts of the pressing plate, the support platform adopts an annular support platform. When the pressing plate 6 is produced, the support platform can be integrated with other parts of the pressing plate, or it can be fixed to other parts of the pressing plate by fastener connection, welding, etc.

[0039] An axial threaded hole is provided on the pressure plate 6, and the tightening screw 4 is installed on the pressure plate 6 through the corresponding threaded hole. When in use, the pressure plate 6 is first fixed to the sleeve connecting plate by the tightening bolt 5. The pressure plate 6 axially limits the shaft connecting plate. At this time, the rotation angle of the transmission shaft 3 is adjusted. After it is adjusted in place, the tightening screw 4 can be tightened to tighten the shaft connecting plate relative to the sleeve connecting plate, thereby achieving the fixation of the shaft connecting plate and the sleeve connecting plate, and then achieving the purpose of fixing the connection mechanism joint 7 and the connecting rod joint. In the case of a support platform, when installing the pressure plate 6, the tightening bolt 5 can be passed through the support platform, thereby ensuring that the connection position can have higher strength and better reliability.

[0040] Since the output shaft 8 of the operating mechanism and the connecting rod 1 of the switch body often need to withstand greater impact and torque at the connection position, in order to provide a sufficiently large tightening force during specific manufacturing, the diameter, number, position, etc. of the tightening screws 4 can be calculated in advance to meet the requirements.

[0041] like Figure 1 As shown, when the connecting rod 1 is a hollow structure, in order to achieve a reliable connection with the connecting rod 1, the connecting rod joint also includes a plug sleeve 2 that is anti-rotationally matched with the transmission shaft 3. Based on the adoption of this structure, as a preferred embodiment, as Figure 1 As shown, the transmission shaft 3 is a spline shaft, and the plug sleeve 2 is a spline sleeve matched with the spline shaft. In order to ensure the coaxiality with the connecting rod, a positioning section is provided at the end of the plug sleeve 2 away from the shaft connection plate. The positioning section is formed by thinning the wall thickness of the plug sleeve from the outside. At the end of the positioning section close to the shaft connection plate, a welding groove for welding with the connecting rod is formed on the outer wall of the plug sleeve.

[0042] Specific implementation of the high voltage switch of the present invention: The high-voltage switch of the present invention comprises a switch body and an operating mechanism, and the operating mechanism is connected to the operating mechanism output connection device of the present invention. Since the specific connection structure has been involved and explained above, it will not be repeated here.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An operating mechanism output connection device, comprising a mechanism joint for fixedly connecting to an output shaft of the operating mechanism and a connecting rod joint for fixedly connecting to a connecting rod of a switch body, characterized in that: The mechanism joint includes a connecting sleeve for fixedly connecting to the output shaft and a sleeve connecting plate arranged at an end of the connecting sleeve away from the mechanism, the connecting rod joint includes a transmission shaft and a shaft connecting plate arranged at one end of the transmission shaft close to the sleeve connecting plate, the shaft connecting plate is axially constrained to the sleeve connecting plate by a pressure plate, the pressure plate and the sleeve connecting plate are fixedly connected by fastening bolts, the shaft connecting plate can rotate in the space enclosed by the pressure plate and the sleeve connecting plate, and a tightening screw for tightening and fixing the shaft connecting plate is installed on the pressure plate.

2. The operating mechanism output connection device according to claim 1, characterized in that: The pressing plate is an annular pressing plate, and a supporting platform for supporting and cooperating with the sleeve connecting disk is arranged at the edge of the annular pressing plate.

3. The operating mechanism output connection device according to claim 2, characterized in that: The support platform is an annular support platform.

4. The operating mechanism output connection device according to claim 2 or 3, characterized in that: The fastening bolt passes through the supporting platform.

5. The operating mechanism output connection device according to claim 1, 2 or 3, characterized in that: A keyway for cooperating with the key provided on the output shaft or a key for cooperating with the keyway provided on the output shaft is arranged on the inner wall of the connecting sleeve.

6. The operating mechanism output connection device according to claim 5, characterized in that: A welding groove is arranged at one end of the connecting sleeve away from the sleeve connecting plate.

7. The operating mechanism output connection device according to claim 1, 2 or 3, characterized in that: The connecting rod joint also includes a plug-in sleeve that is anti-rotatably matched with the transmission shaft.

8. The operating mechanism output connection device according to claim 7, characterized in that: The transmission shaft is a spline shaft, and the plug-in sleeve is a spline sleeve matched with the spline shaft.

9. The operating mechanism output connection device according to claim 8, characterized in that: A welding groove is arranged at one end of the plug-in sleeve away from the shaft connecting plate.

10. A high voltage switch, comprising a switch body and an operating mechanism, wherein an output connection device is connected to an output shaft of the operating mechanism, characterized in that: The output connection device is the operating mechanism output connection device according to any one of claims 1 to 9.

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