Master controller with long service life

Abstract

The utility model relates to a master controller with long service life, which comprises a mechanism frame, a plurality of contact groups and an operating mechanism, the operating mechanism comprises two crankshafts, an operating rod and two cams, the two cams act along with the two crankshafts and respectively drive moving contact frames of the contact groups to act, and the contact groups are connected or disconnected. Two gear limiting mechanisms matched with the two crankshafts are arranged in the mechanism frame, and each gear limiting mechanism comprises a ratchet wheel in linkage fit with the corresponding crankshaft, a lever rotationally arranged in the mechanism frame and matched with the ratchet wheel, a roller arranged on the lever and a compression spring arranged between the lever and the mechanism frame. The ratchet wheel is provided with a plurality of gear grooves, the gear grooves act along with the ratchet wheel and are buckled on the roller, and the ratchet wheel and the gear grooves are matched in a limiting mode. The device has the advantages of being simple in structure, stable and reliable in performance, convenient to operate and long in service life.

Description

Technical Field

[0001] The utility model relates to a master controller, in particular to a master controller with a long service life. Background Art

[0002] The master controller (also known as the master switch) is mainly used in electrical transmission devices to open and close contacts in a certain order to achieve the purpose of issuing commands or other control circuit interlocking and conversion. It is suitable for frequent connection and disconnection of circuits, and is often used in conjunction with magnetic starters to remotely control the starting, braking, speed regulation and reversing of wound-rotor asynchronous motors. It is widely used in the control systems of traction motors of various types of lifting machinery. The master controller includes a mechanism frame, an operating mechanism arranged on the mechanism frame, and a contact system arranged in the mechanism frame. The structural design of the gear limit mechanism of the contact system of the existing master controller is relatively complex, and the gear limit of the gear limit mechanism is unreliable and has a short service life. In addition, the structural design of the self-reset component of the operating mechanism is complex, resulting in greater resistance to the toggle and reset of the operating mechanism's joystick, and inconvenient operation. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a master controller with simple structure, stable and reliable performance, convenient operation and long service life.

[0004] To achieve the above-mentioned purpose, the utility model adopts a main command controller with a long service life, including a mechanism frame, a plurality of contact groups respectively arranged on the mechanism frame, and an operating mechanism arranged on the mechanism frame for controlling the closing of the plurality of contact groups. The operating mechanism includes two crankshafts respectively rotatably arranged on the mechanism frame, an operating rod arranged on the mechanism frame and used to drive the two crankshafts to rotate, and two cams that cooperate with the two crankshafts in linkage. The two cams move with the two crankshafts and respectively drive the moving contact frame of the contact group to move, and realize the connection or disconnection of the contact group. Two gear limit mechanisms that cooperate with the two crankshafts are arranged in the mechanism frame. The gear limit mechanism includes a ratchet that cooperates with the crankshaft, a lever that is rotatably arranged in the mechanism frame and cooperates with the ratchet, a roller arranged on the lever, and a compression spring arranged between the lever and the mechanism frame. The ratchet is respectively provided with a plurality of gear slots, and the plurality of gear slots move with the ratchet and are respectively buckled on the rollers, and constitute a limiting cooperation between the ratchet and the gear slots.

[0005] The beneficial effects of the above structure are: a gear limit mechanism matched with two crankshafts is arranged in the mechanism frame, and the gear limit mechanism adopts a ratchet structure design, so the gear switching is more reliable, the service life is longer, and the one-to-five-gear operation can be realized, and the multi-gear contact disconnection and closing control signals can be satisfied. The lever is matched with the ratchet through a roller, and a compression spring is arranged between the lever and the mechanism frame. The pressure of the compression spring can ensure that the roller and the ratchet are reliably limited, thereby ensuring that the gear switching of the master controller is more reliable, the gear switching is more flexible, and the operation is more convenient. Therefore, the master controller has the advantages of simple structure, stable and reliable performance, convenient operation, and long service life.

[0006] In particular, a positioning groove is provided at one end of the lever, and a positioning boss matched with the positioning groove is provided on the mechanism frame, and the positioning boss is inserted into the positioning groove to form a rotational connection and cooperation between the lever and the positioning boss. The lever is engaged with the positioning boss of the mechanism frame through the positioning groove, thereby facilitating the assembly of the lever and the mechanism frame, and the assembly is more convenient.

[0007] In particular, the other end of the lever is provided with a limiting boss matched with the compression spring, one end of the compression spring is engaged with the limiting boss, and the other end of the compression spring is engaged with the limiting groove of the mechanism frame. The compression spring is engaged between the limiting boss of the lever and the limiting groove of the mechanism frame, so as to facilitate the assembly of the compression spring, the lever and the mechanism frame, and the assembly is more convenient, and it can ensure that the lever can be reliably reset, which is conducive to improving the working reliability of the master controller.

[0008] In particular, two groups of self-reset components cooperating with two crankshafts are respectively arranged in the mechanism frame, and the self-reset components include two self-reset plates symmetrically arranged in the mechanism frame, and a spring arranged between the two self-reset plates. Two driving arms cooperating with the two self-reset plates are respectively arranged on the crankshaft, and two arc-shaped grooves cooperating with the two driving arms are respectively arranged on one end of the two self-reset plates. The two driving arms abut in the two arc-shaped grooves, and form a linkage cooperation between the two self-reset plates and the two driving arms. Two groups of self-reset components cooperating with the two crankshafts are arranged in the mechanism frame. When the operator moves the operating lever, the operating lever drives the crankshaft to move, and the crankshaft drives the self-reset plate to move through the driving arm. The self-reset plate compresses the spring. When the operator releases the operating lever, the self-reset component drives the crankshaft and the operating lever to automatically reset. Thereby, the automatic reset of the operating lever is realized, and the operation is more convenient.

[0009] In particular, a positioning protrusion is respectively provided on the middle part of the two self-resetting sheets, and the two ends of the spring are respectively engaged with the positioning protrusions of the two self-resetting sheets, and the spring and the two self-resetting sheets are engaged. The spring is engaged between the positioning protrusions of the two self-resetting sheets, so that the assembly of the spring and the two self-resetting sheets is convenient, and the two self-resetting sheets can be ensured to be able to operate reliably, which is conducive to improving the working reliability of the master controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a stereogram of an embodiment of the utility model.

[0011] Figure 2 This is the internal structure of an embodiment of the utility model.

[0012] Figure 3 It is a structural diagram of the gear position limiting mechanism of an embodiment of the utility model.

[0013] Figure 4 It is a structural diagram of the self-resetting component of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] like Figures 1 to 4As shown, the embodiment of the utility model is a main controller with a long service life, including a mechanism frame 10, a plurality of contact groups 11 respectively arranged on the mechanism frame 10, and an operating mechanism 20 arranged on the mechanism frame 10 for controlling the opening and closing of the plurality of contact groups 11. The operating mechanism 20 includes two crankshafts 21 respectively arranged on the mechanism frame 10, an operating rod 22 arranged on the mechanism frame 10 and used to drive the two crankshafts 21 to rotate, and two cams 23 that cooperate with the two crankshafts 21. The two cams 23 move with the two crankshafts 21 and respectively drive the moving contact frames 111 of the contact groups 11 to move, and the operating mechanism 20 is realized. In order to connect or disconnect the contact group 11, the mechanism frame 10 is provided with two gear limiting mechanisms 30 that cooperate with the two crankshafts 21. The gear limiting mechanism 30 includes a ratchet 31 that cooperates with the crankshaft 21, a lever 32 that is rotatably arranged in the mechanism frame 10 and cooperates with the ratchet 31, a roller 33 arranged on the lever 32, and a compression spring 34 arranged between the lever 32 and the mechanism frame 10. The ratchet 31 is respectively provided with a plurality of gear slots 311, and the plurality of gear slots 311 move with the ratchet 31 and are respectively buckled on the roller 33, and constitute the limiting cooperation between the ratchet 31 and the gear slot 311. A positioning slot 321 is provided at one end of the lever 32, and a positioning boss 101 that cooperates with the positioning slot 321 is provided on the mechanism frame 10. The positioning boss 101 is inserted in the positioning slot 321, and constitutes the rotational connection cooperation between the lever 32 and the positioning boss 101. The lever is engaged with the positioning boss of the mechanism frame through the positioning groove, so that the assembly of the lever and the mechanism frame is convenient and the assembly is more convenient. The other end of the lever 32 is provided with a limiting boss 322 matched with the compression spring 34, one end of the compression spring 34 is engaged with the limiting boss 322, and the other end of the compression spring 34 is engaged in the limiting groove 102 of the mechanism frame 10. The compression spring is engaged between the limiting boss of the lever and the limiting groove of the mechanism frame, so that the assembly of the compression spring, the lever and the mechanism frame is convenient and the assembly is more convenient, and it can ensure that the lever can be reliably reset, which is conducive to improving the working reliability of the master controller.

[0015] like Figure 2 and 4As shown, the mechanism frame 10 is provided with two groups of self-reset components 40 respectively matched with the two crankshafts 21, and the self-reset components 40 include two self-reset sheets 41 symmetrically arranged in the mechanism frame 10, and a spring 42 arranged between the two self-reset sheets 41, and the crankshaft 21 is provided with two driving arms 211 respectively matched with the two self-reset sheets 41, and one end of the two self-reset sheets 41 is provided with two arc grooves 411 respectively matched with the two driving arms 211, and the two driving arms 211 are respectively abutted in the two arc grooves 411, and constitute the linkage cooperation between the two self-reset sheets 41 and the two driving arms 211. Two groups of self-reset components matched with the two crankshafts are arranged in the mechanism frame, and when the operator moves the operating rod, the operating rod drives the crankshaft to move, and the crankshaft drives the self-reset sheet to move through the driving arm, and the self-reset sheet compresses the spring, and when the operator releases the operating rod, the self-reset component drives the crankshaft and the operating rod to automatically reset. Thereby, the automatic reset of the operating rod is realized, and the operation is more convenient. A positioning protrusion 412 is respectively provided on the middle of the two self-resetting sheets 41, and the two ends of the spring 42 are respectively engaged with the positioning protrusions 412 of the two self-resetting sheets 41, and constitute the engagement between the spring 42 and the two self-resetting sheets 41. The spring is engaged between the positioning protrusions of the two self-resetting sheets, so as to facilitate the assembly of the spring and the two self-resetting sheets, and ensure that the two self-resetting sheets can operate reliably, thereby facilitating the working reliability of the master controller.

[0016] A gear limit mechanism matched with two crankshafts is arranged in the mechanism frame. The gear limit mechanism adopts a ratchet structure design, which makes gear switching more reliable and has a longer service life. It can realize one to five gear operations and can meet the multi-gear contact disconnection and closing control signals. The lever is matched with the ratchet through a roller, and a compression spring is arranged between the lever and the mechanism frame. The pressure of the compression spring can ensure that the roller and the ratchet are reliably limited, thereby ensuring that the gear switching of the master controller is more reliable, the gear switching is more flexible, and the operation is more convenient. Therefore, the master controller has the advantages of simple structure, stable and reliable performance, convenient operation, and long service life.

Claims

1. A master controller with a long service life, characterized in that: The invention comprises a mechanism frame, a plurality of contact groups respectively arranged on the mechanism frame, and an operating mechanism arranged on the mechanism frame for controlling the closing of the plurality of contact groups. The operating mechanism comprises two crankshafts respectively rotatably arranged on the mechanism frame, an operating rod arranged on the mechanism frame and used to drive the two crankshafts to rotate, and two cams cooperating with the two crankshafts. The two cams move with the two crankshafts and respectively drive the moving contact frames of the contact groups to move, and realize the connection or disconnection of the contact groups. Two gear limit mechanisms cooperating with the two crankshafts are arranged in the mechanism frame. The gear limit mechanisms comprise a ratchet cooperating with the crankshaft, a lever rotatably arranged in the mechanism frame and cooperating with the ratchet, a roller arranged on the lever, and a compression spring arranged between the lever and the mechanism frame. The ratchet is respectively provided with a plurality of gear slots, and the plurality of gear slots move with the ratchet and are respectively buckled on the rollers, and constitute a limiting cooperation between the ratchet and the gear slots.

2. The master controller with a long service life according to claim 1, characterized in that: One end of the lever is provided with a positioning groove, and the mechanism frame is provided with a positioning boss matched with the positioning groove. The positioning boss is inserted into the positioning groove and constitutes a rotational connection and cooperation between the lever and the positioning boss.

3. The master controller with a long service life according to claim 1 or 2, characterized in that: The other end of the lever is provided with a limiting boss matched with a compression spring, one end of the compression spring is engaged on the limiting boss, and the other end of the compression spring is engaged in the limiting groove of the mechanism frame.

4. The master controller with a long service life according to claim 1 or 2, characterized in that: Two groups of self-resetting components cooperating with the two crankshafts are respectively arranged in the mechanism frame, and the self-resetting components include two self-resetting plates symmetrically arranged in the mechanism frame and a spring arranged between the two self-resetting plates. Two driving arms cooperating with the two self-resetting plates are respectively arranged on the crankshaft, and two arc-shaped grooves cooperating with the two driving arms are respectively arranged on one end of the two self-resetting plates. The two driving arms are abutted in the two arc-shaped grooves, and constitute the linkage cooperation between the two self-resetting plates and the two driving arms.

5. The master controller with a long service life according to claim 4, characterized in that: A positioning protrusion is respectively arranged on the middle part of the two self-resetting sheets, and the two ends of the spring are respectively engaged with the positioning protrusions of the two self-resetting sheets, and constitute a clamping fit between the spring and the two self-resetting sheets.

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