Handcart type load break switch

Abstract

The application discloses a handcart type load switch which comprises a chassis, a box body and six contact arms, the box body is internally provided with a mounting frame, the mounting frame is respectively provided with an energy storage closing mechanism, an energy storage opening mechanism and an opening keeping mechanism, the mounting frame comprises a left mounting plate and a right mounting plate, the box body is internally divided into a left mounting space, a middle mounting space and a right mounting space which are arranged in a transverse direction, the energy storage closing mechanism comprises a closing energy storage module, a closing execution module and a closing transmission module, a first transmission shaft is rotatably arranged on the right mounting plate, the energy storage opening mechanism comprises a connecting rod module, an opening energy storage module and an opening execution module, and the opening keeping mechanism is connected with the input end of the connecting rod module and the opening execution module in a linkage mode, and the handcart type load switch has a compact and reasonable internal structure, can reduce the internal space occupation of the load switch, and in particular can reduce the space occupation in the width direction.

Description

Technical Field

[0001] This invention relates to a handcart-type load switch. Background Technology

[0002] The trolley-type load switch is one of the supporting components of the load switch cabinet. Traditional three-phase trolley-type load switches generally include six connecting arms, arranged in a two-row, three-column (3 horizontal, 2 vertical) configuration. For example, the Chinese utility model patent for a trolley-type load switch fuse assembly (CN214068601U) discloses such a two-row, three-column connecting arm arrangement. This arrangement means that the mechanisms inside the trolley-type load switch that perform functions such as opening, closing, energy storage, and tripping are primarily designed to maximize the use of space in the width direction, resulting in a generally large overall width for the product. However, with product evolution and upgrades, new requirements have been placed on the overall width of the load switch cabinet. Existing load switch cabinets are now narrower, requiring the six connecting arms to be arranged in a three-row, two-column (2 horizontal, 3 vertical) configuration. This means that the internal components of the traditional trolley-type load switch cannot adapt to the new internal space, affecting its normal operation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a handcart-type load switch with a more compact and rational internal structure, which can reduce the size of the load switch, especially its width.

[0004] To achieve the above objectives, the present invention provides a handcart-type load switch, comprising a chassis, a housing located at the front upper part of the chassis, and six contact arms located at the rear of the housing. An installation frame is provided inside the housing, on which an energy storage closing mechanism, an energy storage opening mechanism, and an opening holding mechanism are respectively installed. The installation frame includes a vertically arranged left installation plate and a right installation plate, which are arranged in parallel intervals. The left and right installation plates divide the interior of the housing into a horizontally arranged left installation space, a middle installation space, and a right installation space. The six contact arms are arranged in three rows and two columns. One column of three contact arms contains a vacuum interrupter for connecting or disconnecting the circuit. The other column of three contact arms contains a fuse for automatically cutting off the circuit in case of overload. One column of contact arms is positioned behind the central mounting space, and the other column of three contact arms is positioned behind the right-side mounting space. The energy storage closing mechanism includes a closing energy storage module and a closing execution module located in the right-side mounting space, and a closing transmission module located in the central mounting space. A first transmission module is rotatably connected to the right mounting plate. The closing energy storage module and the closing transmission module are connected via a first transmission shaft. The closing energy storage module generates and briefly stores the power needed to drive the closing mechanism, which is then transmitted to the closing transmission module via the first transmission shaft. The energy storage opening mechanism includes a linkage module, an opening energy storage module, and an opening execution module. The linkage module and the opening energy storage module are both located in the central installation space. The opening execution module is located between the left, central, and right installation spaces. The input end of the linkage module works in conjunction with the closing transmission module. The opening holding mechanism is located in the central installation space. The installation space is connected to the input end of the linkage module and the tripping execution module. The output end of the linkage module is connected to the vacuum interrupter of one of the contact arms. The linkage module and the tripping energy storage module are linked. The power of the closing transmission module is transmitted to the input end of the linkage module, which drives the vacuum interrupter of one of the contact arms to achieve the closing action. At the same time, the linkage module can also cause the tripping energy storage module to store the power to drive the tripping action. A linkage mechanism is also set in the right installation space. The linkage mechanism is linked to the fuse tube of another contact arm and the tripping execution module. When an overload occurs, the trigger rod of the fuse tube is activated. This action is transmitted to the tripping execution module and the tripping holding mechanism in sequence through the linkage mechanism. The tripping holding mechanism releases the restriction on the input end of the linkage module. The linkage module achieves tripping under the drive of the tripping energy storage module, thereby realizing the overload protection function.

[0005] Furthermore, the closing energy storage module includes a first gear disk, a second gear disk, and a closing energy storage spring. The first gear disk is located above the second gear disk, and the first and second gear disks are connected by a chain drive. The first gear disk is connected to the right end of the first drive shaft through a one-way clutch, so that the first gear disk can drive the first drive shaft to rotate when rotating in one direction, and will not drive the first drive shaft to rotate when rotating in the opposite direction. The upper end of the energy storage spring is pivotally connected to the eccentric position of the one-way clutch, and the lower end of the energy storage spring is pivotally connected to the positioning shaft that is fixed to the right mounting plate. The closing execution module is located in the lower part of the right mounting space, and the closing execution module and the second gear disk work together in linkage.

[0006] Furthermore, the closing execution module includes a closing execution motor and an operating handle that are driven to both ends of the second gear disk. A through groove is provided on the outer panel of the housing. The operating end of the operating handle can swing out to the outside of the housing or swing back to the inside of the housing along the through groove.

[0007] Furthermore, the closing transmission module includes a cam disposed at the left end of the first transmission shaft; the input end of the linkage module includes a linkage block rotatably disposed on the right mounting plate, three swing arms rotatably disposed between the left and right mounting plates, and a connecting rod movably connected to the three swing arms; the three swing arms are respectively connected to one of the row of contact arms; the opening energy storage module includes an opening energy storage spring sleeved and abutting on the connecting rod, and a spring bracket fixedly installed in the middle mounting space and supported in cooperation with the opening energy storage spring; the opening holding mechanism includes a connecting plate rotatably disposed on the right mounting plate and a holding member rotatably disposed on the connecting plate; the opening execution module includes an opening execution motor disposed in the left mounting space, an opening button disposed in the right mounting space, and a second transmission shaft rotatably disposed between the left and right mounting plates; the second transmission shaft cooperates with the connecting plate to limit or release movement; the opening execution motor and the opening button are respectively linked with both ends of the second transmission shaft.

[0008] Furthermore, the linkage mechanism includes a transmission rod rotatably mounted on the rear side wall of the housing, a swing plate positioned close to the rear side wall of the housing, and a sliding plate positioned along the right mounting plate. The transmission rod has an abutment plate that engages with the rear end of the fuse tube of another row of contact arms. One end of the swing plate is connected to the transmission rod, and the other end engages with the rear end of the sliding plate to push it. The front end of the sliding plate engages with the right end of the second transmission shaft. When an overload occurs, the trigger rod of the fuse tube actuates. This actuation is transmitted sequentially to the tripping execution module and the tripping holding mechanism via the linkage mechanism. The tripping holding mechanism releases the restriction on the input end of the linkage module, and the linkage module, driven by the tripping energy storage module, trips the circuit breaker, thereby achieving the overload protection function.

[0009] The beneficial effects of this invention are: the internal structure of the handcart-type load switch is compact and the structural arrangement is reasonable, which can reduce the space occupied inside the handcart-type load switch, especially the space occupied in the width direction, so that the overall volume of the handcart-type load switch, especially the width, can be made smaller; the internal components such as the energy storage closing mechanism, energy storage opening mechanism, opening holding mechanism, and linkage mechanism are arranged in different installation spaces such as the left installation space, the middle installation space, and the right installation space formed by the left installation plate and the right installation plate. The left installation plate and the right installation plate have the effect of supporting and positioning the installation and movement of these internal components, so that these internal components are separated from each other, which is not easy to cause interference, and facilitates installation and maintenance. Attached Figure Description

[0010] Figure 1 This is a perspective view of an embodiment of the present invention;

[0011] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention. Figure 1 ;

[0012] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the present invention. Figure 2 ;

[0013] Figure 4 This is a schematic diagram of the internal structure of an embodiment of the present invention. Figure 3 ;

[0014] Figure 5 This is a structural diagram of the closing energy storage module according to an embodiment of the present invention;

[0015] Figure 6 This is an assembly diagram of the closing energy storage module according to an embodiment of the present invention;

[0016] Figure 7 This is a schematic diagram illustrating the cooperation between the cam and the linkage block in an embodiment of the present invention;

[0017] Figure 8 This is a structural diagram of the tripping and holding mechanism according to an embodiment of the present invention;

[0018] Figure 9 This is a schematic diagram illustrating the cooperation of the closing transmission module, the opening holding mechanism, and the connecting rod module in an embodiment of the present invention. Detailed Implementation

[0019] Examples of embodiments of the handcart-type load switch of the present invention Figure 1-9As shown: The system includes a chassis 1, a housing 12 located at the front of the upper end of the chassis 11, and six contact arms located at the rear of the housing 12. A mounting frame is installed inside the housing 12, on which an energy storage closing mechanism, an energy storage opening mechanism, and an opening holding mechanism are respectively mounted. The mounting frame includes a vertically arranged left mounting plate 21 and a right mounting plate 22, which are arranged in parallel intervals. The left mounting plate 21 and the right mounting plate 22 divide the interior of the housing 12 into a horizontally arranged left mounting space 201, a middle mounting space 202, and a right mounting space 203. The left mounting space 201 is formed by the left mounting plate 21 and the housing 12. The central mounting space 202 is defined by a side wall of the body 12, and the two sides of the central mounting space 202 are defined by a left mounting plate 21 and a right mounting plate 22. The right mounting space 203 is defined by the right mounting plate 22 and the other side wall of the housing 12. The six contact arms are arranged in a three-row, two-column matrix. One column of three contact arms 31 contains a vacuum interrupter, and another column of three contact arms 32 contains a fuse. One column of contact arms 31 is positioned behind the central mounting space 202, and the other column of three contact arms 32 is positioned behind the right mounting space 203. The energy storage closing mechanism includes a closing energy storage module, a closing execution module, and a central mounting space 203, all located in the right mounting space 203. The closing drive module in the installation space 202 has a first drive shaft 41 rotatably connected to the right installation plate 22. The closing energy storage module and the closing drive module are connected by the first drive shaft 41. The closing energy storage module generates and temporarily stores the power used to drive the closing, which is transmitted to the closing drive module through the first drive shaft 41. The energy storage opening mechanism includes a linkage module, an opening energy storage module, and an opening execution module. The linkage module and the opening energy storage module are both located in the middle installation space 202. The opening execution module is located between the left installation space 201, the middle installation space 202, and the right installation space 203. The input end of the linkage module is connected to the closing mechanism. The transmission module works in conjunction with the tripping and holding mechanism, which is located in the central installation space 202 and works in conjunction with the input end of the linkage module and the tripping execution module. The output end of the linkage module is connected to the vacuum interrupter of one of the contact arms 31. The linkage module and the tripping energy storage module are linked. The power of the closing transmission module is transmitted to the input end of the linkage module, which drives the vacuum interrupter of one of the contact arms 31 to achieve the closing action. At the same time, the linkage module can also cause the tripping energy storage module to store the power to drive the tripping action. A linkage mechanism is also provided in the right installation space 203, which is linked with the fuse tube of another contact arm 32 and the tripping execution module. When an overload occurs, the trigger rod of the fuse tube is activated. This action is transmitted to the tripping execution module and the tripping holding mechanism in sequence through the linkage mechanism. The tripping holding mechanism releases the restriction on the input end of the linkage module, and the linkage module trips under the drive of the tripping energy storage module, thereby realizing the overload protection function.

[0020] The closing energy storage module includes a first gear disk 51, a second gear disk 52, and a closing energy storage spring 53. The first gear disk 51 is located above the second gear disk 52. The first gear disk 51 and the second gear disk 52 are connected by a chain drive. The first gear disk 51 is connected to the right end of the first drive shaft 41 through a one-way clutch 54. This allows the first gear disk 51 to drive the first drive shaft 41 to rotate when rotating in one direction, but not to drive the first drive shaft 41 to rotate when rotating in the opposite direction. The upper end of the closing energy storage spring 53 is pivotally connected to the eccentric position of the one-way clutch 54, and the lower end of the closing energy storage spring 53 is pivotally connected to the positioning shaft 42, which is fixed to the right mounting plate 22. The closing execution module is located in the lower part of the right mounting space 203, and the closing execution module and the second gear disk 52 work together in linkage.

[0021] The closing execution module includes a closing execution motor 55 and an operating handle 56 that are driven to both ends of the second gear disk 52. A through groove 121 is provided on the outer panel of the housing 12. The operating end of the operating handle can swing out to the outside of the housing or swing back to the inside of the housing along the through groove.

[0022] Power is provided by the closing actuator motor 55 when it is energized, or by manually operating the operating handle 56, to drive the second gear disk 52 to rotate. The second gear disk 52 drives the first gear disk 51 to rotate via a chain. Since the upper end of the closing energy storage spring 53 is pivotally connected to the eccentric position of the one-way clutch 54, it can stretch and store energy. The number of teeth and diameter of the first gear disk 51 are greater than those of the second gear disk 52, which saves effort. The use of a toothed chain transmission structure also allows for a more compact internal structure of the gearbox.

[0023] When not in use, the operating handle 56 can be embedded inside the through groove 121 to avoid interference or accidental operation. The width of the through groove 121 is larger than the width of the operating handle 56, or recesses extending into the inside of the through groove 121 are provided on both sides of the through groove 121. This design makes it convenient for the operator's fingers to insert and grasp the operating handle 56.

[0024] The closing transmission module includes a cam 57 located at the left end of the first transmission shaft 41. The input end of the linkage module includes a linkage block 61 rotatably mounted on the right mounting plate 22, three swing arms 62 rotatably mounted between the left mounting plate 21 and the right mounting plate 22, and a connecting rod 63 movably connected to the three swing arms 62. The three swing arms 62 respectively cooperate and link with the moving contacts of the vacuum interrupter chambers of the three contact arms 31 in one row. The opening energy storage module includes an opening energy storage spring 71 sleeved and abutting against the connecting rod 63, and a spring bracket 72 fixedly mounted in the central mounting space 202 and supported by the opening energy storage spring 71. The opening holding mechanism includes a connecting plate 81 rotatably mounted on the right mounting plate 22 and a holding member 82 rotatably mounted on the connecting plate 81. Torsion springs are provided between plate 81 and retainer 82, and between connecting plate 81 and mounting bracket. The tripping execution module includes a tripping execution motor 91 located in the left mounting space 201, a tripping button 92 located in the right mounting space 203, and a second drive shaft 93 rotatably located between the left mounting plate 21 and the right mounting plate 22. The two ends of the second drive shaft 93 are respectively linked to the tripping execution motor 91 and the tripping button 92. The torsion spring drives the connecting plate 81 to be pressed against the second drive shaft 93. The second drive shaft 93 cooperates with the connecting plate 81 to limit or release movement. A notch 931 is provided on the second drive shaft 93. The tripping execution motor 91 and the tripping button 92 are respectively linked with the two ends of the second drive shaft 93. The tripping button 92 protrudes from the outside of the housing for easy pressing operation. A torsion spring is also provided between the second drive shaft 93 and the mounting bracket to drive the second drive shaft 93 to rotate and reset in the closing holding direction.

[0025] When the closing energy storage spring 53 is driven to its longest stretched state, the force applied by the closing energy storage spring 53 to the one-way clutch 54 changes direction as the first gear disk 51 continues to rotate. At this time, the closing energy storage spring 53 can drive the first transmission shaft 41 to continue rotating rapidly in the original direction. The first transmission shaft 41 drives the cam 57 to rotate, and the cam 57 drives the swing arm 62 and the connecting rod 63 to move through the linkage block 61, thereby realizing the closing process. While the connecting rod 63 is moving, it causes the opening energy storage spring 71 to compress and store energy through the spring bracket 72.

[0026] The tripping motor 91 generates power when energized or when the tripping button 92 is pressed, driving the second drive shaft 93 to rotate. When in the closed state, the second drive shaft 93 and the connecting plate 81 cooperate to limit movement, and the retaining member 82 cooperates with the linkage block 61 to limit movement, thereby preventing the linkage module from tripping (e.g., ...). Figure 8As shown, when the second drive shaft 93 rotates, the notch 931 of the second drive shaft 93 rotates to the position corresponding to the connecting plate 81. The connecting plate 81 moves under the action of the torsion spring and passes through the notch 931, so that the limit between the retaining member 82 and the linkage block 61 is released. Under the power of the opening energy storage spring 71, the connecting rod module is driven to move in the opening direction, thereby realizing the rapid opening process.

[0027] The linkage mechanism includes a transmission rod 101 rotatably mounted on the rear side wall of the housing, a swing plate 102 positioned close to the rear side wall of the housing, and a sliding plate 103 positioned along the right mounting plate 22. The transmission rod 101 has an abutment plate 1011 that engages with the rear end of the fuse tube of another row of contact arms 32. One end of the swing plate 102 is connected to the transmission rod 101, and the other end engages with the rear end of the sliding plate 103 to push it forward. The front end of the sliding plate 103 engages with the right end of the second transmission shaft 93. When an overload occurs, the trigger rod of the fuse tube actuates, driving the abutment plate 1011 to rotate around the transmission rod 101. The swing plate 102 pushes the sliding plate 103 forward, and the sliding plate 103 drives the second transmission shaft 93 to rotate, thereby tripping the circuit breaker during an overload. This linkage mechanism, positioned along the side wall of the mounting space 203 and the rear wall of the housing, occupies less space on the right side of the mounting space 203, resulting in a more compact structure.

[0028] The above embodiments are merely one preferred embodiment of the present invention. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included within the protection scope of the present invention.

Claims

1. A trolley-type load switch, comprising a chassis, a housing located at the front upper part of the chassis, and six contact arms located at the rear of the housing. A mounting frame is provided inside the housing, and an energy storage closing mechanism, an energy storage opening mechanism, and an opening holding mechanism are respectively mounted on the mounting frame. The switch is characterized in that: The mounting bracket includes a vertically positioned left mounting plate and a right mounting plate, which are arranged in parallel intervals. The left and right mounting plates divide the interior of the housing into a horizontally arranged left mounting space, a middle mounting space, and a right mounting space. The six contact arms are arranged in three rows and two columns, with one column of three contact arms containing a vacuum interrupter and the other column of three contact arms containing a fuse. One column of contact arms is positioned behind the middle mounting space, and the other column of three contact arms is positioned behind the right mounting space. The energy storage closing mechanism includes a closing energy storage module and a closing execution module located in the right mounting space, and a closing transmission module located in the middle mounting space. A rotating connection is provided on the right mounting plate. The first drive shaft connects the closing energy storage module and the closing transmission module. The energy storage tripping mechanism includes a linkage module, a tripping energy storage module, and a tripping execution module. The linkage module and the tripping energy storage module are both located in the middle installation space. The tripping execution module is located between the left installation space, the middle installation space, and the right installation space. The input end of the linkage module is linked with the closing transmission module. The tripping holding mechanism is located in the middle installation space and is linked with the input end of the linkage module and the tripping execution module. The output end of the linkage module is connected to the vacuum interrupter of one row of contact arms. A linkage mechanism is also provided in the right installation space. The linkage mechanism is linked with the fuse tube of the other row of contact arms and the tripping execution module.

2. The handcart-type load switch according to claim 1, characterized in that: The closing energy storage module includes a first gear disk, a second gear disk, and a closing energy storage spring. The first gear disk is located above the second gear disk, and the first and second gear disks are connected by a chain drive. The first gear disk is connected to the right end of the first drive shaft through a one-way clutch. The upper end of the energy storage spring is pivotally connected to the eccentric position of the one-way clutch, and the lower end of the energy storage spring is pivotally connected to a positioning shaft that is fixed to the right mounting plate. The closing execution module is located in the lower part of the right mounting space, and the closing execution module and the second gear disk work together in linkage.

3. The handcart-type load switch according to claim 2, characterized in that: The closing execution module includes a closing execution motor and an operating handle that are driven to both ends of the second gear disk. A through groove is provided on the outer panel of the housing. The operating end of the operating handle can swing out to the outside of the housing or swing back to the inside of the housing along the through groove.

4. The handcart-type load switch according to claim 1, characterized in that: The closing transmission module includes a cam located at the left end of the first transmission shaft. The input end of the linkage module includes a linkage block rotatably mounted on the right mounting plate, three swing arms rotatably mounted between the left and right mounting plates, and a connecting rod movably connected to the three swing arms. The three swing arms are respectively connected to one of the contact arms in one row. The opening energy storage module includes an opening energy storage spring sleeved on and abutting against the connecting rod, and a spring bracket fixedly mounted in the middle mounting space and supported by the opening energy storage spring. The opening holding mechanism includes a connecting plate rotatably mounted on the right mounting plate and a retaining member rotatably mounted on the connecting plate. The opening execution module includes an opening execution motor located in the left mounting space, an opening button located in the right mounting space, and a second transmission shaft rotatably mounted between the left and right mounting plates. The second transmission shaft cooperates with the connecting plate to limit or release movement. The opening execution motor and the opening button are respectively linked with both ends of the second transmission shaft.

5. The handcart-type load switch according to claim 4, characterized in that: The linkage mechanism includes a transmission rod rotatably mounted on the rear side wall of the housing, a swing plate close to the rear side wall of the housing, and a sliding plate along the right mounting plate. The transmission rod is provided with an abutment plate that abuts against the rear end of the fuse tube of another row of contact arms. One end of the swing plate is connected to the transmission rod, and the other end of the swing plate is pushed by the rear end of the sliding plate. The front end of the sliding plate is linked with the right end of the second transmission shaft.

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