Pole-mounted circuit breaker

Abstract

The invention relates to a pole-mounted circuit breaker, and relates to the technical field of circuit breakers, the pole-mounted circuit breaker comprises a circuit breaker main body and an isolation switch, the side surface of the circuit breaker main body is fixedly provided with a support frame used for supporting the isolation switch, and the support frame is rotatably provided with a driving rod used for controlling the opening and closing of the isolation switch; an operating rod and an adjusting rod are fixedly arranged on the peripheries of the two ends of the driving rod respectively, an adjusting electric cylinder is hinged to the side face, away from the operating rod, of the circuit breaker body, the end of an output shaft of the adjusting electric cylinder is hinged to the end, away from the driving rod, of the adjusting rod, and the adjusting electric cylinder drives the driving rod to rotate through the adjusting rod during operation; in the application, the manual control structure and the remote control structure of the isolating switch are respectively arranged at the two ends of the driving rod, so that the manual control structure and the remote control structure are respectively positioned near the two opposite side surfaces of the circuit breaker main body, and enough space is provided for disassembling and assembling parts during later maintenance, so that the time consumed by maintenance is shortened, and the corresponding maintenance efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a pole-mounted circuit breaker. Background Art

[0002] Pole-mounted circuit breakers, as a vital component of the power system, are installed on poles and are responsible for automatically cutting off power supply in an emergency and protecting equipment and personnel from electric shock. For county-level power supply companies, ensuring the proper management and maintenance of pole-mounted circuit breakers and incorporating them into a standardized and systematic management system is the cornerstone of maintaining corporate safety management and power supply reliability.

[0003] The structure of the pole-mounted vacuum circuit breaker in current technology is mainly composed of two major parts: the circuit breaker body and the disconnector. The circuit breaker body is precisely integrated with core components such as the operating mechanism and the vacuum container. The operating mechanism is responsible for closing and opening the circuit breaker body and the disconnector. In order to provide the flexibility of manual control, a manual operating lever is also added on one side of the disconnector, allowing the operator to manually intervene in the state of the disconnector when necessary. In actual operation, when opening, the circuit breaker body must first be placed in the open state through the operating mechanism (or manual operating lever), and then the disconnector is operated; when closing, the opposite is true, first operate the disconnector, and then close the circuit breaker body.

[0004] However, the current design has a problem that needs to be optimized: the part of the operating mechanism that controls the disconnector and the manual operating lever are usually located on the same side of the circuit breaker body, resulting in dense connections and parts in this area, compact space layout, and limited reserved clearance. This design may not only increase the difficulty of daily maintenance, but also limit the efficiency of maintenance work to a certain extent, especially when delicate operations or troubleshooting are required, which brings unnecessary challenges to the staff and there is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a pole-mounted circuit breaker to solve the problem in the above-mentioned related art that the part of the operating mechanism that controls the disconnector is centrally designed with the manual operating lever, which affects the subsequent maintenance efficiency and there is room for improvement.

[0006] The present application provides a pole-mounted circuit breaker adopting the following technical solution: A pole-mounted circuit breaker comprises a circuit breaker body and an isolating switch, wherein a support frame for supporting the isolating switch is fixedly arranged on the side of the circuit breaker body, and a driving rod for controlling the opening and closing of the isolating switch is rotatably arranged on the support frame; an operating rod and an adjusting rod are respectively fixedly arranged on the outer periphery of both ends of the driving rod, an adjusting electric cylinder is hinged on the side of the circuit breaker body away from the operating rod, an output shaft end of the adjusting electric cylinder is hinged to an end of the adjusting rod away from the driving rod, and when the adjusting electric cylinder is in operation, the driving rod is driven to rotate through the adjusting rod.

[0007] By adopting the above technical solution, the manual control structure and the remote control structure of the disconnector are respectively arranged at the two ends of the driving rod, so that they are respectively located near the two opposite sides of the circuit breaker body, so that there is enough space to disassemble and assemble parts during later maintenance, thereby reducing the time spent on maintenance and improving the corresponding maintenance efficiency.

[0008] Optionally, a base plate is provided below the circuit breaker body, a plurality of support rods are fixedly provided on the base plate, and upper ends of the support rods are fixedly connected to the bottom side of the circuit breaker body.

[0009] By adopting the above technical solution, due to the arrangement of the base plate and the support rod on the base plate, when the pole-mounted circuit breaker is installed, a gap is provided between the bottom side of the circuit breaker body and the installation surface; in heavy rainy weather, the erosion of the bottom side of the circuit breaker body by rainwater on the installation surface is reduced, thereby improving the corresponding waterproof performance.

[0010] Optionally, a plurality of rollers are arranged on the bottom side of the base plate, and a traction handle is hingedly connected to the side of the base plate facing the circuit breaker body, and the traction handle can be rotated, adjusted and fixed.

[0011] By adopting the above technical solution, due to the coordinated arrangement of the traction handle and the roller, when the pole-mounted circuit breaker needs to be moved a short distance before installation, the staff can control the traction handle to quickly drag the base plate to slide on the ground.

[0012] Optionally, a receiving groove for the roller to be placed is provided on the bottom side of the substrate, a fixing rod with one end rotatably connected to the roller is provided on the substrate, and a fixing through hole for the fixing rod to pass through and connected to the receiving groove is provided on the substrate; a control member is provided on the substrate, and the traction handle can squeeze the fixing rod through the control member to make the roller protrude from the opening of the receiving groove.

[0013] By adopting the above technical solution, when the circuit breaker needs to be moved, the traction handle can be rotated at a certain angle to squeeze the upper end of the fixed rod through the control member, so that the roller protrudes from the lower opening of the accommodating groove; when the pole-mounted circuit breaker is installed on a certain installation surface, the traction handle can be rotated so that the roller is completely placed inside the accommodating groove.

[0014] Optionally, a fixed retaining ring is fixed on the outer periphery of the fixed rod, a fixed recessed groove for insertion and sliding up and down is provided on the opening edge of the fixed through hole facing the circuit breaker body, and a compression spring is provided on the base plate, with both ends respectively fixedly connected to the bottom side of the fixed recessed groove and the lower side of the fixed retaining ring.

[0015] By adopting the above technical solution, due to the coordinated arrangement of the fixed retaining ring and the compression spring, when the control member does not squeeze the upper end of the fixed rod, the compression spring squeezes the fixed retaining ring, causing the fixed rod and the roller to automatically move upward as a whole until the roller is completely placed in the accommodating groove, thereby facilitating the storage of the roller and reducing the possibility of the roller protruding from the accommodating groove in a natural state.

[0016] Optionally, the control component includes a control plate slidably mounted on the side of the substrate facing the circuit breaker body, and a positioning protrusion fixed on one side of the control plate; a connecting rod is hinged on the outer periphery of the traction handle, and the other end of the connecting rod is hinged to one end of the control plate; a guiding inclined surface that can abut against the positioning protrusion is provided on the edge of the upper end portion of the fixed rod.

[0017] By adopting the above technical solution, when the traction handle is rotated, the control plate is driven by the connecting rod to slide back and forth on the base plate, so that the positioning protrusion on the control plate slides along the guiding inclined surface to abut against the upper end of the fixing rod, thereby moving the roller connected to the lower end of the fixing rod out of the opening of the receiving groove; when the positioning protrusion and the fixing rod are misaligned and not abutted, the roller is completely placed in the receiving groove and stored under the influence of the deadweight of the base plate.

[0018] Optionally, a limit plate located above the control panel is provided on the side of the circuit breaker body, and a damping spring is fixedly provided on the side of the limit plate facing the control panel; a support block is fixedly provided on the side of the control panel away from the base plate, and a guide slope is provided on the side edge of the support block facing the damping spring, and the upper side surface of the support block can slide along the guide slope to a state of abutting against the lower side of the damping spring, and the positioning protrusion and the fixing rod are misaligned and not abutted in this state.

[0019] By adopting the above technical solution, when the positioning protrusion and the fixing rod are in a misaligned and non-abutting state, due to the coordinated arrangement of the damping spring and the support block, the upper side surface of the support block can slide along the guide slope to a position abutting against the lower side of the damping spring, thereby better supporting the circuit breaker body and improving the installation stability of the circuit breaker body in this state.

[0020] Optionally, a receiving plate is fixedly provided on the side of the support frame away from the circuit breaker body, and the pulling handle can be rotated to abut against the bottom side of the receiving plate and fixed, and the positioning protrusion and the fixing rod are misaligned and not abutted in this state.

[0021] By adopting the above technical solution, when the positioning protrusion and the fixing rod are misaligned and not in contact, the pulling handle is rotated to abut against the receiving plate, thereby improving the overall installation stability of the column-mounted circuit breaker in this state.

[0022] Optionally, an elastic pad is fixedly provided on the outer periphery of the traction handle, and anti-slip grooves are provided on the surface of the elastic pad.

[0023] By adopting the above technical solution, due to the provision of the elastic pad, it is convenient for the user to better control the traction handle, and the stability of the traction handle when it abuts against the bottom side of the receiving plate is improved.

[0024] Optionally, a limiting groove for the traction handle to rotate into is provided on the side of the receiving plate facing the base plate.

[0025] By adopting the above technical solution, when the traction handle abuts against the bottom side of the receiving plate, due to the setting of the upper limit groove on the bottom side of the receiving plate, a part of the traction handle rotates into the limit groove and abuts against the inner wall of the limit groove, thereby further improving the stability of the traction handle when abutting against the bottom side of the receiving plate.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The manual control structure and remote control structure of the disconnector are respectively arranged at the two ends of the driving rod, so that they are respectively located near the two opposite sides of the circuit breaker body, so that there is enough space for disassembling and assembling parts during later maintenance, thereby reducing the time spent on maintenance and improving the corresponding maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the structure of the adjustment cylinder and the adjustment rod installation in Example 1 of the present application; Figure 2 This is a schematic diagram of the structure of the operation lever installation and coordination in Example 1 of the present application; Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application; Figure 4 It is a partial cross-sectional structural schematic diagram of the installation and matching of the hinge seat and the traction handle in Example 2 of the present application; Figure 5 It is a partial cross-sectional structural schematic diagram of the installation and matching of the roller and the control member in Example 2 of the present application; Figure 6 This is a schematic diagram of the structure of the installation distribution of the fixed retaining ring and the fixed rod in Example 2 of the present application; Figure 7 It is a partial cross-sectional structural schematic diagram of the installation cooperation between the fixed retaining ring and the fixed rod embodied in the second embodiment of the present application; Figure 8It is a partial cross-sectional structural schematic diagram of the installation and matching of the traction handle in Embodiment 2 of the present application; Fig. 9 It is a partial structural schematic diagram of the installation and coordination of the traction handle according to Example 2 of the present application.

[0029] In the figure, 1. circuit breaker body; 11. adjusting electric cylinder; 12. limit plate; 13. damping spring; 2. isolating switch; 3. support frame; 31. driving rod; 32. operating rod; 33. adjusting rod; 34. receiving plate; 341. limit groove; 4. base plate; 41. support rod; 42. hinge seat; 421. locking through hole; 43. accommodating groove; 44. fixing through hole; 45. fixing sink groove; 5. roller; 51. fixing rod; 511. guiding inclined surface; 52. fixing retaining ring; 53. compression spring; 6. traction handle; 61. locking screw hole; 62. elastic pad; 7. control member; 71. control board; 72. positioning protrusion; 73. connecting rod; 74. support block; 741. guiding inclined surface; 8. locking screw. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0031] Embodiment 1: Reference Figure 1 and Figure 2 A pole mounted circuit breaker comprises a circuit breaker body 1 and a disconnector 2, wherein a support frame 3 for supporting the disconnector 2 is fixedly provided on the side of the circuit breaker body 1, and a driving rod 31 is rotatably provided on the support frame 3, wherein when the driving rod 31 rotates, the disconnector 2 can be controlled to be opened and closed through a connecting rod structure, which is a conventional transmission structure and will not be described in detail here; An operating rod 32 and an adjusting rod 33 are respectively fixed on the outer periphery of both ends of the driving rod 31. An adjusting electric cylinder 11 is hinged on the side of the circuit breaker body 1 away from the operating rod 32. The output shaft end of the adjusting electric cylinder 11 is hinged to the end of the adjusting rod 33 away from the driving rod 31. When the adjusting electric cylinder 11 is in operation, the driving rod 31 is driven to rotate through the adjusting rod 33.

[0032] The implementation principle of the embodiment of the present application is: When the disconnector 2 is manually controlled to be opened or closed, the staff can drive the driving rod 31 to rotate by controlling the rotation of the operating rod 32, thereby making the disconnector 2 open or close accordingly; when the disconnector 2 needs to be remotely controlled to be opened or closed, the adjusting electric cylinder 11 is started to adjust its overall length, and then the rotation of the adjusting rod 33 and the driving rod 31 is controlled by adjusting the hinges at both ends of the electric cylinder 11, thereby finally realizing the opening and closing of the disconnector 2.

[0033] Embodiment 2: Reference Figure 3 , Figure 4and Figure 5 The embodiment of the present application is different from the embodiment 1 in that a base plate 4 is provided below the circuit breaker body 1, and four support rods 41 are fixedly provided on the base plate 4, and the upper ends of the support rods 41 are fixedly connected to the four corners of the bottom side of the circuit breaker body 1; four rollers 5 are provided on the bottom side of the base plate 4, wherein a traction handle 6 is hingedly connected to the side of the base plate 4 facing the circuit breaker body 1, and the traction handle 6 can be rotated and adjusted to a certain angle and fixed; A hinge seat 42 is fixedly provided on the base plate 4 and is rotatably connected to the traction handle 6 through a rotating shaft. Three locking through holes 421 are evenly distributed on the hinge seat 42. A locking screw hole 61 that can overlap with the locking through hole 421 is provided on the traction handle 6. A locking screw 8 that can penetrate the locking through hole 421 and be screwed into the locking screw hole 61 is provided on the base plate, and the locking screw 8 is a butterfly screw.

[0034] Reference Figure 5 A receiving groove 43 for the roller 5 to be placed is provided on the bottom side of the base plate 4, a fixing rod 51 is provided on the base plate 4, one end of which is rotatably connected to the roller 5, and a fixing through hole 44 is provided on the base plate 4 for the fixing rod 51 to pass through and communicate with the receiving groove 43; a control member 7 is provided on the base plate 4, and when the traction handle 6 is rotated at a certain angle, the upper end of the fixing rod 51 can be squeezed by the control member 7, so that the roller 5 protrudes from the lower opening of the receiving groove 43.

[0035] Reference Figure 5 and Figure 6 The control member 7 includes a control plate 71 slidably mounted on the side of the substrate 4 facing the circuit breaker body 1, and a positioning protrusion 72 fixedly mounted on one side of the control plate 71. A connecting rod 73 is hingedly mounted on the outer periphery of the traction handle 6, and the other end of the connecting rod 73 is hingedly mounted on one end of the control plate 71. A guiding inclined surface 511 capable of abutting against the positioning protrusion 72 is disposed on the edge of the upper end of the fixing rod 51. When the traction handle 6 is rotated, the control board 71 is driven to slide back and forth on the base plate 4 through the connecting rod 73, so that the positioning protrusion 72 on the control board 71 slides along the guiding inclined surface 511 to a state of abutting against the upper end of the fixing rod 51, thereby moving the roller 5 connected to the lower end of the fixing rod 51 out of the opening of the accommodating groove 43. In this state, the pole-mounted circuit breaker is conveniently moved over a short distance.

[0036] Reference Figure 6 and Figure 7 A fixed retaining ring 52 is integrally formed on the outer periphery of the fixed rod 51, and a fixed sinking groove 45 for insertion and sliding up and down is provided on the opening edge of the fixed through hole 44 facing the circuit breaker body 1, and a compression spring 53 is provided on the base plate 4, and two ends are respectively fixedly connected to the bottom side of the fixed sinking groove 45 and the lower side of the fixed retaining ring 52; When the positioning protrusion 72 and the fixing rod 51 are misaligned and not in contact, the compression spring 53 squeezes the fixing retaining ring 52, so that the fixing rod 51 and the roller 5 move upward as a whole until the roller 5 is completely placed in the accommodating groove 43; when the positioning protrusion 72 squeezes the upper end of the fixing rod 51, the compression spring 53 is compressed, and the fixing rod 51 and the roller 5 move downward as a whole.

[0037] Reference Figure 7 A limiting plate 12 is provided on the side of the circuit breaker body 1 and is located above the control board 71. A damping spring 13 is fixedly provided on the side of the limiting plate 12 facing the control board 71. The damping spring 13 is a conventional structure and is not described in detail here. A supporting block 74 is fixedly provided on the side of the control board 71 away from the base plate 4, and a guiding inclined surface 741 is provided on the side edge of the supporting block 74 facing the damping spring 13. When the positioning protrusion 72 and the fixing rod 51 are in a misaligned and non-contacting state, the upper side surface of the support block 74 can slide along the guide slope 741 to abut against the lower side of the damping spring 13 to better support the circuit breaker body 1.

[0038] Reference Figure 7 , Figure 8 and Fig. 9 An elastic pad 62 made of rubber is fixedly arranged on the outer periphery of the pulling handle 6, wherein the surface of the elastic pad 62 is integrally formed with anti-slip grooves; a receiving plate 34 is fixedly arranged on the side of the support frame 3 away from the circuit breaker body 1, and a limiting groove 341 for the pulling handle 6 to rotate into is opened on the side of the receiving plate 34 facing the base plate 4; The traction handle 6 can be rotated to the limiting groove 341 on the bottom side of the receiving plate 34 and fixed. In this state, the outer side surface of the elastic pad 62 on the traction handle 6 is tightly pressed against the inner wall of the limiting groove 341, the positioning protrusion 72 and the fixing rod 51 are misaligned and not in contact, and the upper side surface of the support block 74 is in contact with the lower side of the damping spring 13.

[0039] The implementation principle of the embodiment of the present application is: When the pole-mounted circuit breaker needs to be moved a short distance, the traction handle 6 is rotated to a certain angle and fixed. During this process, the control board 71 is driven to slide on the base plate 4 through the connecting rod 73, so that the positioning protrusion 72 on the control board 71 slides along the guiding inclined surface 511 to abut against the upper end of the fixing rod 51, and the roller 5 connected to the lower end of the fixing rod 51 protrudes from the opening of the accommodating groove 43. In this state, the traction handle 6 plays a role in facilitating movement and traction; When the column-mounted circuit breaker is installed and fixed, the pulling handle 6 is rotated to the limiting groove 341 on the bottom side of the receiving plate 34 and fixed. In this process, the control plate 71 is driven by the connecting rod 73, so that the positioning protrusion 72 on the control plate 71 and the fixing rod 51 are misaligned and not abutted, and the support block 74 on the control plate 71 slides along the guide inclined surface 741 to a position abutting against the lower side of the damping spring 13, and finally the base plate 4 is fixed on the surface to be installed; in this state, the pulling handle 6 supports the support frame 3, and the combination of the support block 74 and the damping spring 13 supports and reduces shock for the circuit breaker body 1.

[0040] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pole mounted circuit breaker, characterized in that: The invention comprises a circuit breaker body (1) and an isolating switch (2); a support frame (3) for supporting the isolating switch (2) is fixedly provided on the side of the circuit breaker body (1); a driving rod (31) for controlling the opening and closing of the isolating switch (2) is rotatably provided on the support frame (3); An operating rod (32) and an adjusting rod (33) are respectively fixedly provided on the outer periphery of both ends of the driving rod (31); an adjusting electric cylinder (11) is hingedly connected to the side of the circuit breaker body (1) away from the operating rod (32); an output shaft end of the adjusting electric cylinder (11) is hingedly connected to an end of the adjusting rod (33) away from the driving rod (31); when the adjusting electric cylinder (11) is in operation, the driving rod (31) is driven to rotate via the adjusting rod (33).

2. A pole mounted circuit breaker according to claim 1, characterized in that: A base plate (4) is provided below the circuit breaker body (1), a plurality of support rods (41) are fixedly provided on the base plate (4), and the upper ends of the support rods (41) are fixedly connected to the bottom side of the circuit breaker body (1).

3. A pole mounted circuit breaker according to claim 2, characterized in that: A plurality of rollers (5) are arranged on the bottom side of the base plate (4), and a traction handle (6) is hingedly connected to the side of the base plate (4) facing the circuit breaker body (1), and the traction handle (6) can be rotated, adjusted and fixed.

4. A pole mounted circuit breaker according to claim 3, characterized in that: The bottom side of the base plate (4) is provided with a receiving groove (43) for the roller (5) to be placed therein; the base plate (4) is provided with a fixing rod (51) with one end rotatably connected to the roller (5); the base plate (4) is provided with a fixing through hole (44) for the fixing rod (51) to pass through and which is in communication with the receiving groove (43); the base plate (4) is provided with a control member (7); the traction handle (6) can squeeze the fixing rod (51) through the control member (7) so as to make the roller (5) protrude from the opening of the receiving groove (43).

5. A pole mounted circuit breaker according to claim 4, characterized in that: A fixed retaining ring (52) is fixedly arranged on the outer periphery of the fixed rod (51); a fixed recessed groove (45) inserted and sliding up and down is provided on the opening edge of the fixed through hole (44) facing the circuit breaker body (1); and a compression spring (53) is provided on the base plate (4) with two ends respectively fixedly connected to the bottom side of the fixed recessed groove (45) and the lower side of the fixed retaining ring (52).

6. A pole mounted circuit breaker according to claim 4, characterized in that: The control member (7) comprises a control plate (71) slidably arranged on the side of the base plate (4) facing the circuit breaker body (1), and a positioning protrusion (72) fixedly arranged on one side of the control plate (71); a connecting rod (73) is hingedly connected to the outer periphery of the pulling handle (6); the other end of the connecting rod (73) is hingedly connected to one end of the control plate (71); and a guiding inclined surface (511) capable of abutting against the positioning protrusion (72) is provided on the edge of the upper end of the fixing rod (51).

7. A pole mounted circuit breaker according to claim 6, characterized in that: A limit plate (12) located above the control panel (71) is provided on the side of the circuit breaker body (1), and a damping spring (13) is fixedly provided on the side of the limit plate (12) facing the control panel (71); A support block (74) is fixedly provided on the side of the control plate (71) away from the base plate (4); a guide slope (741) is provided on the side edge of the support block (74) facing the damping spring (13); the upper side of the support block (74) can slide along the guide slope (741) to a state of abutting against the lower side of the damping spring (13); the positioning protrusion (72) and the fixing rod (51) are misaligned and not abutting in this state.

8. A pole mounted circuit breaker according to claim 6, characterized in that: A receiving plate (34) is fixedly provided on the side of the support frame (3) away from the circuit breaker body (1); the pulling handle (6) can be rotated to abut against the bottom side of the receiving plate (34) and fixed; the positioning protrusion (72) and the fixing rod (51) are misaligned and not in contact in this state.

9. A pole mounted circuit breaker according to claim 8, characterized in that: An elastic pad (62) is fixedly arranged on the outer periphery of the traction handle (6), and anti-slip grooves are arranged on the surface of the elastic pad (62).

10. The pole mounted circuit breaker according to claim 8, characterized in that: A limiting groove (341) into which the traction handle (6) is rotated is provided on the side of the receiving plate (34) facing the base plate (4).

Images