Automatic reset mechanism for master controller

Abstract

The utility model relates to order controller field especially, especially a kind of automatic reset mechanism of order controller, the reset mechanism of existing all installation is in the bottom of controller, it is difficult to operate when maintaining, long time is consumed, influence the normal use of equipment, to solve the above problem the utility model provides a kind of automatic reset mechanism of order controller, including cover, handle, transmission shaft, pedestal, reset mechanism and support shell, pedestal one end is provided with mounting seat, reset mechanism is detachably installed in mounting seat, cover is covered in the top of pedestal, handle is set in cover and pedestal, transmission shaft is fixedly connected in the bottom of handle, reset mechanism includes reset module, rack, reset pressing plate, reset pressing plate top is provided with sector gear, sector gear is engaged with rack, rack one end is attached with reset module, reset spring is fixedly installed in reset module, reset mechanism installation position is on the upper side and is convenient for maintenance, reset mechanism is detachably set, and it is convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of master controllers, and in particular to an automatic reset mechanism for a master controller. Background Technology

[0002] The master controller is mainly used in electro-hydraulic transmission devices to open and close contacts in a certain sequence to issue commands or interlock and switch other control circuits. It is suitable for frequent circuit switching and is often used in conjunction with magnetic starters to remotely control the starting, braking, speed regulation, and commutation of wound-rotor asynchronous motors. It is widely used in the drive motor control systems of various types of lifting machinery.

[0003] To ensure operational safety and prevent accidents, the master controller is equipped with an automatic zero-position reset mechanism. After operation, the operating mechanism must return to the zero position. Existing reset mechanisms include either tension spring or compression spring types. Both types of springs are prone to fatigue deformation or breakage after prolonged use. Deformation can lead to inaccurate reset, causing jamming and posing a significant safety hazard. Currently, the reset mechanisms are all installed at the bottom of the controller, making maintenance difficult, time-consuming, and disrupting normal equipment operation. Utility Model Content

[0004] The technical problem this utility model aims to solve is that existing reset mechanisms are all installed at the bottom of the controller, which makes maintenance difficult, time-consuming, and affects the normal use of the equipment.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This utility model provides an automatic reset mechanism for a master controller, including a cover plate, a handle, a transmission shaft, a base, a reset mechanism, and a support shell. The top of the cover plate has a connecting hole, and the handle is movably disposed in the connecting hole. The bottom of the handle is fixedly connected to the transmission shaft, and the handle drives the transmission shaft to rotate along the axis of the transmission shaft. Two parallel bearing seats are fixedly disposed at the bottom of the base, and a connecting groove is opened at the top of the base. Two symmetrical mounting seats are disposed at one end of the base. The reset mechanism includes two reset modules, a rack, and a reset pressure plate. The two reset modules are arranged opposite to each other. Each reset module has a cavity, and one end of each reset module has a reset through hole connecting to the cavity. A reset mechanism is fixedly installed inside each reset module. The spring has a rack positioned between two reset through holes. Reset grooves are formed on both sides of the rack. A sector gear is positioned on the top of the reset pressure plate, meshing with the rack. Receiving grooves are formed at both ends of the support shell. The cover plate is fixedly connected to the base by screws. The connecting hole communicates with the connecting groove. The handle is movably positioned within the connecting hole and the connecting groove. Both ends of the drive shaft are rotatably mounted in two bearing seats. The two reset modules are detachably mounted in two mounting seats. The rack slides between the two mounting seats. The reset pressure plate is fixedly mounted at one end of the drive shaft. The support shell is snapped into the bottom of the base. The two bearing seats are respectively positioned in the two receiving grooves. The reset pressure plate is located outside the support shell.

[0006] Preferably, a base platform is fixedly installed at one end of the base, the base platform being located between two mounting seats. A first slide rail is provided on the base platform, and the rack is slidably mounted on the first slide rail via a reset groove. A protective plate is fixedly connected to one end of the support shell by screws. An L-shaped fixing arm is provided on the top of the protective plate, and a second slide rail is provided on one long side of the fixing arm, which is in contact with the rack. The rack is slidably mounted on the second slide rail via a reset groove. The reset pressure plate is rotatably mounted between the protective plate and the support shell. The rack is slidably mounted between the base platform and the fixing arm, and the displacement of the fixed trajectory is achieved through the cooperation of the first and second slide rails with the reset groove. The protective plate mainly serves to support the rack and protect the reset pressure plate.

[0007] Preferably, the reset module includes a housing, a spring plate, and a tension plate. The two ends of the reset spring are fixedly mounted on the spring plate and the tension plate, respectively. The tension plate is located in the cavity near the reset through-hole, and its size is the same as the reset through-hole. The reset through-hole communicates with the bottom of the housing. The spring plate is fixedly connected to one end of the housing by screws. A groove is formed on the top of the housing, and a lifting plate is fixedly installed in the groove. A hook plate is provided on the top of the tension plate. Grooves are formed on the top of both ends of the rack, and the hook plate is detachably disposed in the groove. The width of the reset through-hole communicates with the bottom of the housing. One end of the rack is located in the reset through-hole, facilitating the insertion of the tension plate into the groove via the hook plate. When the rack moves, it can simultaneously compress and stretch two reset springs, providing elasticity for the rack's reset and enhancing the reset effect. The hook plate inserted into the groove is also easy to disassemble, facilitating the replacement of the reset module. The cavity width is greater than the width of the reset through-hole, and the tension plate fits against the inner wall of the cavity, preventing the spring and tension plate from detaching from the cavity. The lifting plate in the groove facilitates the disassembly of the reset module.

[0008] Preferably, a switch plate is fixedly mounted on one end of the drive shaft. The bottom of the switch plate is arc-shaped, and microswitches are respectively provided at both ends of the bottom of the switch plate. Rotation of the switch plate will trigger the microswitches.

[0009] Preferably, a zero-positioning mechanism is provided inside the support shell. The zero-positioning mechanism includes a zero-position pressure plate, a spring plate, and a positioning spring. The zero-position pressure plate is sleeved and fixed on the drive shaft. The bottom of the zero-position pressure plate has a fan-shaped head with a positioning groove. One end of the positioning spring is fixedly connected to the bottom of the spring plate. A positioning roller is rotatably mounted on the top of the spring plate and is located in the positioning groove. The zero-positioning mechanism is used to limit the handle to the zero position to prevent the handle from shaking and causing accidental activation of the microswitch. The positioning roller can rotate, and the positioning groove on the fan-shaped head of the zero-position pressure plate is engaged with the positioning roller. When the fan-shaped head moves, it will press down on the positioning roller until it is disengaged from the positioning groove. The positioning roller drives the spring plate to move downward. When the positioning groove moves back onto the positioning roller, the positioning spring lifts the spring plate, causing the positioning roller to be engaged in the positioning groove.

[0010] Preferably, a positioning seat is provided on the inner wall of the support shell, a pressure plate groove is formed on the top of the positioning seat, a positioning spring is disposed in the pressure plate groove, a positioning slide groove is formed on the inner wall of the pressure plate groove, and a positioning slider is provided on one side of the elastic plate, the positioning slider being slidably disposed in the positioning slide groove. The positioning spring is fixedly installed in the pressure plate groove to provide elastic support for the elastic plate, and the positioning slider cooperates with the positioning slide groove to prevent the elastic plate from tilting left or right when squeezed, thus affecting the elastic plate's recovery.

[0011] The beneficial effects of this utility model are as follows: This utility model achieves quick replacement by setting an installation seat on the base and setting a detachable reset mechanism in the installation seat. The reset mechanism is set above the master controller for easy repair. A hook plate is set on the top of the tension plate, and grooves are opened on the top of both ends of the rack. The hook plate is detachably set in the groove. When the rack moves, it can simultaneously compress and stretch two reset springs, which can provide elasticity for the rack reset and enhance the reset effect. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 This is a right-side view of the present invention;

[0015] Figure 3 This is a utility model Figure 2 Schematic diagram of the cross section at point AA;

[0016] Figure 4 This is a utility model Figure 3 Enlarged schematic diagram of the structure at point B;

[0017] Figure 5 This is a three-dimensional schematic diagram showing the disassembled state of the structure and a partial cross-section of the structure of this utility model;

[0018] Figure 6 This is an exploded perspective view of the reset mechanism of this utility model;

[0019] Figure 7 This is a three-dimensional schematic diagram of the hook plate and groove of this utility model in an unconnected state.

[0020] Figure 8 This is a three-dimensional schematic diagram of a partial cross-section of the structure of this utility model;

[0021] Figure 9 This is a three-dimensional schematic diagram of some parts of the zero-position positioning mechanism of this utility model;

[0022] Figure 10 This is a three-dimensional schematic diagram of a portion of the structure of this utility model;

[0023] Figure 11 This is a three-dimensional schematic diagram of the base of this utility model;

[0024] Figure 12 This is a three-dimensional schematic diagram of the support shell of this utility model;

[0025] Figure 13 This is a three-dimensional schematic diagram of the protective plate of this utility model.

[0026] In the diagram: 1. Cover plate; 2. Handle; 3. Drive shaft; 4. Base; 5. Reset mechanism; 6. Support shell; 7. Reset spring; 8. Protective plate; 9. Fixed arm; 10. Second slide rail; 11. Housing; 12. Spring plate; 13. Pull-down plate; 14. Groove; 15. Lifting plate; 16. Switch pressure plate; 17. Micro switch; 18. Zero-position positioning mechanism; 19. Zero-position pressure plate; 20. Elastic plate; 21. Positioning spring; 22. Fan-shaped head; 23. Positioning... 24. Groove; 25. Positioning roller; 26. Positioning seat; 27. Pressure plate groove; 28. Positioning slide groove; 29. ​​Positioning slider; 30. Hook plate; 101. Groove; 401. Connecting hole; 402. Bearing seat; 403. Connecting groove; 404. Mounting seat; 405. Base; 406. First slide rail; 501. Reset module; 502. Rack; 503. Reset pressure plate; 504. Reset through hole; 505. Reset slide groove; 506. Sector gear; 601. Receiving groove. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] Throughout this specification, reference to "in one particular embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrase "in one particular embodiment" or "in some embodiments" appears in various places throughout the specification, and not all references are to the same embodiment. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.

[0029] like Figures 1 to 13The automatic reset mechanism of a master controller shown includes a cover plate 1, a handle 2, a drive shaft 3, a base 4, a reset mechanism 5, and a support shell 6. The top of the cover plate 1 has a connecting hole 101. The handle 2 is movably disposed in the connecting hole 101. The bottom of the handle 2 is fixedly connected to the drive shaft 3, and the handle 2 drives the drive shaft 3 to rotate along its axis. Two parallel bearing seats 401 are fixedly disposed at the bottom of the base 4. A connecting groove 402 is opened at the top of the base 4. Two symmetrical mounting seats 403 are disposed at one end of the base 4. The reset mechanism 5 includes two reset modules 501, a rack 502, and a reset pressure plate 503. The two reset modules 501 are arranged opposite each other. Each reset module 501 has a cavity. One end of each reset module 501 has a reset through hole 504 connecting to the cavity. A reset spring 7 is fixedly installed inside each reset module 501. The rack 502 is disposed on the two reset modules 501. Between the through holes 504, the rack 502 has reset grooves 505 on both sides. The reset pressure plate 503 is provided with a sector gear 506 on the top, which meshes with the rack 502. The support shell 6 has receiving grooves 601 at both ends. The cover plate 1 is fixedly connected to the base 4 by screws. The connecting hole 101 is connected to the connecting groove 402. The handle 2 is movably disposed in the connecting hole 101 and the connecting groove 402. The two ends of the drive shaft 3 are respectively rotatably disposed in two bearing seats 401. The two reset modules 501 are respectively detachably installed in two mounting seats 403. The rack 502 is slidably disposed between the two mounting seats 403. The reset pressure plate 503 is fixedly installed at one end of the drive shaft 3. The support shell 6 is snapped into the bottom of the base 4. The two bearing seats 401 are respectively disposed in the two receiving grooves 601. The reset pressure plate 503 is located on the outside of the support shell 6.

[0030] In one specific implementation, such as Figures 4 to 7 and Figure 11 As shown, a base 404 is fixedly installed at one end of the base 4. The base 404 is located between two mounting seats 403. A first slide rail 405 is provided on the base 404. The rack 502 is slidably mounted on the first slide rail 405 through the reset slide groove 505.

[0031] In one specific implementation, such as Figures 3 to 5 and Figure 13 As shown, a protective plate 8 is fixedly connected to one end of the support shell 6 by screws. An L-shaped fixing arm 9 is provided on the top of the protective plate 8. A second slide rail 10 is provided on one long side of the fixing arm 9. One long side of the fixing arm 9 is in contact with the rack 502. The rack 502 is slidably mounted on the second slide rail 10 through the reset slide groove 505. The reset pressure plate 503 is rotatably mounted between the protective plate 8 and the support shell 6.

[0032] In one specific implementation, such as Figure 6 and Figure 7As shown, the reset module 501 includes a housing 11, a spring plate 12, and a tension plate 13. The two ends of the reset spring 7 are fixedly installed on the spring plate 12 and the tension plate 13, respectively. The tension plate 13 is located in the cavity near the reset through hole 504. The tension plate 13 is the same size as the reset through hole 504. The spring plate 12 is fixedly connected to one end of the housing 11 by screws. The top of the housing 11 has a groove 14. A lifting plate 15 is fixedly installed in the groove 14. The top of the tension plate 13 is provided with a hook plate 29. The top of both ends of the rack 502 has grooves 30. The hook plate 29 is detachably installed in the groove 30.

[0033] In one specific implementation, such as Figure 1 As shown, a switch plate 16 is fixedly installed at one end of the drive shaft 3. The bottom of the switch plate 16 is arc-shaped, and micro switches 17 are respectively provided at both ends of the bottom of the switch plate 16.

[0034] In one specific implementation, such as Figure 3 , Figure 5 , Figure 8 , Figure 9 and Figure 10 As shown, a zero-positioning mechanism 18 is provided inside the support shell 6. The zero-positioning mechanism 18 includes a zero-position pressure plate 19, an elastic plate 20, and a positioning spring 21. The zero-position pressure plate 19 is sleeved and fixed on the transmission shaft 3. The bottom of the zero-position pressure plate 19 is provided with a fan-shaped head 22, and a positioning groove 23 is opened on the fan-shaped head 22. One end of the positioning spring 21 is fixedly connected to the bottom of the elastic plate 20. A positioning roller 24 is rotatably provided on the top of the elastic plate 20, and the positioning roller 24 is located in the positioning groove 23.

[0035] In one specific implementation, such as Figure 8 , Figure 9 and Figure 12 As shown, a positioning seat 25 is provided on the inner wall of the support shell 6. A pressure plate groove 26 is opened on the top of the positioning seat 25. A positioning spring 21 is provided in the pressure plate groove 26. A positioning slide groove 27 is opened on the inner wall of the pressure plate groove 26. A positioning slider 28 is provided on one side of the elastic plate 20. The positioning slider 28 is slidably provided in the positioning slide groove 27.

[0036] In use, the handle 2 is turned, moving within the connecting hole 101 and the connecting groove 402, causing the transmission shaft 3 to rotate. The switch plate 16 and the zero-position plate 19, fixed at both ends of the transmission shaft 3, rotate accordingly. Both the switch plate 16 and the zero-position plate 19 are positioned downwards. During rotation, the switch plate 16 triggers the micro switch 17. Simultaneously, the positioning groove 23 on the fan-shaped head 22 at the bottom of the zero-position plate 19 disengages from the positioning roller 24, causing the fan-shaped head 22 to press against the positioning roller 24. The positioning roller 24 rolls and adheres to the surface of the fan-shaped head 22, pressing down the elastic plate 20. Through the cooperation of the positioning slider 28 and the positioning groove 27, the elastic plate 20... The handle 2 is balanced in the pressure plate groove 26. At this time, the reset pressure plate 503, which is fixedly installed on the transmission shaft 3, also rotates. The sector gear 506 of the reset pressure plate 503 is set upward and meshes with the rack 502, converting the rotation of the handle 2 into the linear motion of the rack 502. When the rack 502 moves between the base 404 and the fixed arm 9, the reset slide grooves 505 on both sides slide on the first slide rail 405 and the second slide rail 10 respectively. The rack 502 moves in the same direction as the handle 2. One end of the rack 502 passes through the reset through hole 504 and abuts against the pull plate 13, pushing the pull plate 13 to move in the cavity. The reset spring in the cavity When the rack 502 is compressed, the other end of the rack 502 moves the tension plate 13 through the groove 30 and the hook plate 29. The return spring 7 in the cavity is stretched. When the handle 2 is released, the rack 502 quickly returns to its original position under the action of the two return springs 7 that are compressed and stretched respectively. When the positioning groove 23 on the fan-shaped head 22 is locked back onto the positioning roller 24, the elastic plate 20 pushes the positioning roller 24 against the positioning groove 23 under the push of the positioning spring 21, and the handle 2 will not move under the action of no external force. After the return spring 7 is fatigued or broken, it needs to be replaced. Remove the cover plate 1 to expose the base. The top of the base 4 and the mounting base 403 are connected. The lifting plate 15 pulls the housing 11 to pull the reset module 501 out of the mounting base 403. During the pulling process, the hook plate 29 disengages from the groove 30. The screw is turned to remove the spring plate 12. The spring plate 12, along with the spring 7 and the tension plate 13, are removed. A new spring plate 12, spring 7 and tension plate 13 are installed and put back into the housing 11. Then the reset module 501 is put into the mounting base 403. During this process, the hook plate 29 is inserted into the groove 30. Then the cover plate 1 is installed back onto the base 4. The replacement of the reset mechanism is thus completed. The whole mechanism has the advantages of fast replacement speed and fast reset.

[0037] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An automatic reset mechanism for a master controller, comprising a cover plate (1), a handle (2), and a drive shaft (3), wherein the top of the cover plate (1) has a connecting hole (101), the handle (2) is movably disposed in the connecting hole (101), the bottom of the handle (2) is fixedly connected to the drive shaft (3), and the handle (2) drives the drive shaft (3) to rotate along the axis of the drive shaft (3), characterized in that: It also includes, The base (4) has two parallel bearing seats (401) fixedly installed at the bottom, and a connecting groove (402) is opened at the top of the base (4). Two symmetrical mounting seats (403) are provided at one end of the base (4). The reset mechanism (5) includes two reset modules (501), a rack (502), and a reset pressure plate (503). The two reset modules (501) are arranged opposite to each other. Each reset module (501) has a cavity. One end of each reset module (501) has a reset through hole (504) that connects to the cavity. A reset spring (7) is fixedly installed inside the reset module (501). The rack (502) is arranged between the two reset through holes (504). Both sides of the rack (502) have reset grooves (505). A sector gear (506) is provided on the top of the reset pressure plate (503). The sector gear (506) meshes with the rack (502). Support shell (6), both ends of the support shell (6) have receiving grooves (601); The cover plate (1) is fixedly connected to the base (4) by screws. The connecting hole (101) is connected to the connecting groove (402). The handle (2) is movably disposed in the connecting hole (101) and the connecting groove (402). The two ends of the drive shaft (3) are respectively rotatably disposed in the two bearing seats (401). The two reset modules (501) are respectively detachably installed in the two mounting seats (403). The rack (502) is slidably disposed between the two mounting seats (403). The reset pressure plate (503) is fixedly installed at one end of the drive shaft (3). The support shell (6) is snapped into the bottom of the base (4). The two bearing seats (401) are respectively disposed in the two receiving grooves (601). The reset pressure plate (503) is located outside the support shell (6).

2. The automatic reset mechanism of a master controller according to claim 1, characterized in that: The base (4) has a base platform (404) fixedly installed at one end. The base platform (404) is located between two mounting seats (403). A first slide rail (405) is provided on the base platform (404). The rack (502) is slidably mounted on the first slide rail (405) through the reset slide groove (505).

3. The automatic reset mechanism of a master controller according to claim 1, characterized in that: One end of the support shell (6) is fixedly connected to a protective plate (8) by screws. An L-shaped fixing arm (9) is provided on the top of the protective plate (8). A second slide rail (10) is provided on one long side of the fixing arm (9). One long side of the fixing arm (9) is in contact with the rack (502). The rack (502) is slidably disposed on the second slide rail (10) through the reset slide groove (505). The reset pressure plate (503) is rotatably disposed between the protective plate (8) and the support shell (6).

4. The automatic reset mechanism of a master controller according to claim 1, characterized in that: The reset module (501) includes a housing (11), a spring plate (12) and a tension plate (13). The reset spring (7) is fixedly installed on the spring plate (12) and the tension plate (13) at both ends respectively. The tension plate (13) is located in the cavity near the reset through hole (504). The spring plate (12) is fixedly connected to one end of the housing (11) by screws.

5. The automatic reset mechanism of a master controller according to claim 4, characterized in that: The top of the housing (11) has a groove (14), and a lifting plate (15) is fixedly installed in the groove (14). The top of the tension plate (13) is provided with a hook plate (29). The top of both ends of the rack (502) are provided with grooves (30), and the hook plate (29) is detachably installed in the groove (30).

6. The automatic reset mechanism of a master controller according to claim 1, characterized in that: A switch plate (16) is fixedly installed at one end of the drive shaft (3). The bottom of the switch plate (16) is arc-shaped, and micro switches (17) are respectively provided at both ends of the bottom of the switch plate (16).

7. The automatic reset mechanism of a master controller according to claim 1, characterized in that: The support shell (6) is provided with a zero-positioning mechanism (18), which includes a zero-positioning plate (19), an elastic plate (20) and a positioning spring (21). The zero-positioning plate (19) is sleeved and fixed on the transmission shaft (3). The bottom of the zero-positioning plate (19) is provided with a fan-shaped head (22), and a positioning groove (23) is opened on the fan-shaped head (22). One end of the positioning spring (21) is fixedly connected to the bottom of the elastic plate (20). A positioning roller (24) is rotatably provided on the top of the elastic plate (20), and the positioning roller (24) is located in the positioning groove (23).

8. The automatic reset mechanism of a master controller according to claim 7, characterized in that: A positioning seat (25) is provided on the inner wall of the support shell (6). A pressure plate groove (26) is opened on the top of the positioning seat (25). The positioning spring (21) is provided in the pressure plate groove (26). A positioning slide groove (27) is opened on the inner wall of the pressure plate groove (26). A positioning slider (28) is provided on one side of the elastic plate (20). The positioning slider (28) is slidably disposed in the positioning slide groove (27).

Images