Structure for preventing clutch coil assembly from being switched on mistakenly

Abstract

The invention relates to the technical field of braking, in particular to a structure for preventing a clutch coil assembly from being switched on mistakenly, which comprises an elastic shaft assembly, a hollow shaft, a connecting disc assembly, a cam assembly, an electromagnetic clutch assembly, a separator connecting seat and a separator connecting cover, the cam assembly is connected with the end face of the hollow shaft through the connecting disc assembly, and the elastic shaft assembly is in transmission connection with the hollow shaft. When the electromagnetic clutch assembly drives the brake assembly to brake the cam assembly, the elastic shaft assembly rotates along the threads of the cam assembly to abut against the separator connecting base till the separator connecting base and the separator connecting cover are fractured from the corresponding fracture grooves and the connecting piece is snapped, and at the moment, the coil assembly of the electromagnetic clutch assembly is disconnected. And the electromagnetic clutch assembly stops working. According to the device, false triggering of the electromagnetic clutch assembly caused by fault signals is prevented, and the reliability of fault protection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of braking, and in particular to a structure for preventing a clutch coil assembly from being mistakenly connected. Background Art

[0002] With the development of aircraft technology, changes in power supply systems and electrical equipment require aircraft generators to be small, light, and highly reliable, and high-power aircraft generators have become the main power source for aircraft. When aircraft generators are operating in harsh environmental conditions such as high altitude, high speed, and impact, the bearings may wear and stagnate due to poor lubrication, and the windings may overheat, causing the rotor of the aircraft generator to run unsteadily. In severe cases, the bearings may be damaged, the generator may be swept, and the aircraft generator may be damaged or burned, causing signs of failure accidents and seriously affecting flight safety.

[0003] Since the electromagnetic clutch has the characteristics of simple structure, rapid action and quick response, the electromagnetic clutch technology is used to achieve fault control. When the generator is abnormal, the electromagnetic clutch will act to automatically stop the rotor from rotating, so that the generator and the engine are separated, protecting the engine or preventing the generator fault from expanding to the engine.

[0004] In order to prevent the fault signal from being triggered by mistake, a control switch with clear markings and reliable operation is generally selected, or a protection circuit is installed on the power supply line of the electromagnetic clutch coil. This solution needs to be implemented on the generator controller. Therefore, the existing technology is only implemented through a program and requires manual operation, which is not timely enough.

[0005] Therefore, it is necessary to provide a structure for preventing the clutch coil assembly from being misconnected to solve the above problems. Summary of the invention

[0006] The present invention provides a structure for preventing a clutch coil assembly from being mistakenly connected, so as to solve the problem that the existing method of preventing a fault signal from being mistakenly triggered is implemented through a program, and manual operation is required, but the manual operation is not timely enough.

[0007] A structure for preventing a clutch coil assembly from being mistakenly connected of the present invention adopts the following technical solution, including: Hollow shaft; An elastic shaft assembly, one end of which is used to be key-connected with an engine accessory casing, and the other end of which passes through a hollow shaft and is threadedly connected with a cam assembly, wherein the cam assembly is connected to the end surface of the hollow shaft via a connecting plate assembly, wherein the elastic shaft assembly is drivingly connected to the hollow shaft; The electromagnetic clutch assembly has an output end connected to a brake assembly for driving the brake assembly to brake the cam assembly; and a separator connection seat and a separator connection cover, one end of the separator connection seat is inserted into the mounting hole in the middle of the electromagnetic clutch assembly, the other end of the separator connection seat is connected to the separator connection cover, a connection piece is connected between the separator connection cover and the separator connection seat, and the separator connection cover is connected to the shell of the electromagnetic clutch assembly, one end of the connection piece is connected to the coil assembly of the electromagnetic clutch assembly, the other end of the connection piece is grounded, and a breaking groove is also provided in the middle of the separator connection cover and the separator connection seat; Among them, when the electromagnetic clutch assembly drives the brake assembly to brake the cam assembly, the elastic shaft assembly rotates along the thread of the cam assembly and presses against the separator connecting seat until the separator connecting seat and the separator connecting cover break from the breaking groove, and the connecting piece breaks, the coil assembly of the electromagnetic clutch assembly is disconnected, the electromagnetic clutch assembly stops working, and the elastic shaft assembly is detached from the engine accessory casing.

[0008] Preferably, the separator connecting seat comprises: a connecting plate, on which a guide cylinder is coaxially arranged, wherein the axis of the guide cylinder coincides with the axis of the elastic shaft assembly.

[0009] Preferably, a guide groove is provided in the guide cylinder end facing away from the connecting disk.

[0010] Preferably, the separator connecting cover comprises: a connecting cover of the same size as the connecting disk, a plurality of first fracture grooves evenly distributed around the center of the connecting cover, a plurality of second fracture grooves evenly distributed on the connecting disk around the center of the connecting disk, wherein the connecting sheet is adhered between the contact surface of the connecting disk and the connecting cover.

[0011] Preferably, both the connection plate and the connection cover are provided with weight-reducing grooves.

[0012] Preferably, the connecting sheet is a metal sheet folded back into a boot shape, the boot bottom edge and the boot side of the boot-shaped metal sheet are located between the connecting plate and the connecting cover, and after the two ends of the metal sheet extend out from between the connecting plate and the connecting cover, one end is connected to the coil assembly of the electromagnetic clutch assembly, and the other end is grounded, and the thickness of a section of the metal sheet at the boot bottom edge is less than the thickness of the metal sheet at other positions, and the section of the metal sheet is located between the first fracture groove and the second fracture groove.

[0013] Preferably, the cam assembly comprises: a cam, a threaded through hole is concentrically arranged at the middle of the cam, and the threaded through hole is used for threaded connection with the elastic shaft assembly.

[0014] Preferably, the elastic shaft assembly comprises: A connecting rod, one end of which is key-connected to a connecting hole on an engine accessory casing through a first external spline, and the other end of which is key-connected to an internal spline on an inner wall of the hollow shaft through a second external spline; An elastic shaft, one end of which is connected to the end of the connecting rod in the hollow shaft, and the other end of which is provided with a connector with an installation groove on the end surface; And a pull rod, the outer peripheral surface of one end of which is provided with an external thread for connecting to the threaded through hole of the cam, and the other end of which is a spherical surface, and a square hole is opened in the center of the spherical surface, a connecting rod is arranged in the square hole, and the connecting rod is connected to the spherical surface through a pin arranged on the spherical surface, the spherical surface end of the pull rod is connected to the installation groove of the connecting head, and the end of the pin is slidably connected in the installation groove of the connecting head.

[0015] Preferably, the connecting disk assembly comprises: a connecting disk, which is sleeved on a pull rod between the cam assembly and the hollow shaft, and the cam assembly, the connecting disk and the end of the hollow shaft are connected by screws.

[0016] Preferably, the hollow shaft is used to mount the main generator rotor, exciter rotor, permanent magnet rotor and fan assembly of the aircraft generator.

[0017] The beneficial effects of the present invention are: By setting a separator connecting seat and a separator connecting cover, and setting a connecting plate between the separator connecting seat and the separator connecting cover, when a fault signal triggers the electromagnetic clutch assembly to respond, the electromagnetic clutch assembly drives the brake assembly to brake the cam. At this time, under the drag of the engine accessory casing, the pull rod of the elastic shaft assembly is screwed out of the cam assembly and pressed against the separator connecting seat. The separator connecting seat and the separator connecting cover are disconnected from the corresponding breaking grooves through the screwing force of the pull rod, and the connecting plate between the separator connecting seat and the separator connecting cover is pulled off at the same time. Since the connecting plate is connected to the coil assembly of the electromagnetic clutch assembly, the connecting plate is broken, causing the coil assembly of the electromagnetic clutch assembly to be disconnected, thereby preventing the fault signal from causing false triggering of the electromagnetic clutch assembly and improving the reliability of fault protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a structure for preventing a clutch coil assembly from being misconnected according to the present invention; Figure 2 It is a structural schematic diagram of an elastic shaft assembly in a structure for preventing a clutch coil assembly from being erroneously connected according to the present invention; Figure 3 It is a structural schematic diagram of a separator connection seat in a structure for preventing a clutch coil assembly from being mistakenly connected according to the present invention; Figure 4It is a schematic diagram of the connection between the separator connection seat and the connection plate in a structure for preventing the clutch coil assembly from being connected by mistake according to the present invention; Figure 5 It is a structural schematic diagram of a separator connection cover in a structure for preventing a clutch coil assembly from being mistakenly connected according to the present invention; Figure 6 The present invention is a schematic structural diagram of a connecting plate in a structure for preventing a clutch coil assembly from being mistakenly connected.

[0020] In the figure: 1. elastic shaft assembly; 2. hollow shaft; 3. connecting plate assembly; 4. cam assembly; 5. electromagnetic clutch assembly; 6. connecting plate; 7. separator connecting seat; 8. separator connecting cover; 9. cover; 10. pull rod; 11. brake assembly; 81. first breaking groove; 71. guide cylinder; 711. guide groove; 72. connecting plate; 73. second breaking groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] An embodiment of a structure for preventing a clutch coil assembly from being misconnected according to the present invention is as follows: Figure 1As shown, it includes: an elastic shaft component 1, a hollow shaft 2, a connecting plate component 3, a cam component 4, an electromagnetic clutch component 5, a separator connecting seat 7 and a separator connecting cover 8, one end of the elastic shaft component 1 is used to connect with the engine accessory casing key, the other end of the elastic shaft component 1 is threadedly connected with the center hole of the cam component 4 after passing through the hollow shaft 2, the cam component 4 is connected to the end surface of the hollow shaft 2 through the connecting plate component 3, wherein the elastic shaft component 1 is transmission-connected with the hollow shaft 2; the output end of the electromagnetic clutch component 5 is connected with a brake component 11, the brake component 11 adopts a brake pad, and the electromagnetic clutch component 5 is used to drive the brake component 11 to brake the cam component 4, that is, the brake pad is in contact with the side of the cam component for friction braking; one end of the separator connecting seat 7 is passed through the mounting hole in the middle of the electromagnetic clutch component 5, the other end of the separator connecting seat 7 is connected to the separator connecting cover 8, and the separator connecting cover 8 is connected to the separator A connecting piece 6 is connected between the connecting seats 7, and the separator connecting cover 8 is connected to the shell of the electromagnetic clutch assembly 5 through the cover 9. One end of the connecting piece 6 is connected to the coil assembly of the electromagnetic clutch assembly 5, and the other end of the connecting piece 6 is grounded. A breaking groove is also provided in the middle of the separator connecting cover 8 and the separator connecting seat 7; wherein, when the electromagnetic clutch assembly 5 drives the brake assembly 11 to brake the cam assembly 4, the elastic shaft assembly 1 is rotated out of the center hole of the cam assembly 4 along the center hole thread of the cam assembly 4 and then presses on the separator connecting seat 7. Under the action of the tightening force of the elastic shaft assembly 1, the separator connecting seat 7 and the separator connecting cover 8 are broken from the breaking groove, and the connecting piece 6 between the separator connecting seat 7 and the separator connecting cover 8 is pulled off. At this time, the coil assembly of the electromagnetic clutch assembly 5 is disconnected, the electromagnetic clutch assembly 5 stops working, and the elastic shaft assembly 1 continues to rotate until the elastic shaft assembly 1 is separated from the engine accessory casing.

[0023] like Figure 3 As shown, the separator connecting seat 7 of this embodiment includes: a connecting disk 72, a guide cylinder 71 is concentrically arranged on the connecting disk 72, and the axis of the guide cylinder 71 coincides with the axis of the elastic shaft assembly 1. In order to facilitate the positioning and guiding of the end of the elastic shaft assembly 1 so that the elastic shaft assembly 1 can be accurately placed on the separator connecting seat 7, this embodiment is provided with a guide groove 711 in the end of the guide cylinder 71 away from the connecting disk 72, wherein the guide groove 711 is an expanded hole at the end of the guide cylinder 71.

[0024] like Figure 5 As shown, the separator connection cover 8 includes: a connection cover of the same size as the connection plate 72, a plurality of first fracture grooves 81 are evenly arranged around the center of the connection cover, and a plurality of second fracture grooves 73 are evenly arranged on the connection plate 72 around the center of the connection plate 72, wherein the connection sheet 6 is pasted between the contact surface of the connection plate 72 and the connection cover; the connection plate 72 and the connection cover are both provided with weight reduction grooves, such as Figure 5 As shown, in this example, the weight-reducing grooves are four arc-shaped through grooves.

[0025] like Figure 4 and Figure 6 The connecting sheet 6 is a metal sheet folded back into a boot shape, the bottom edge and the side edge of the boot-shaped metal sheet are located between the connecting plate 72 and the connecting cover, the two ends of the metal sheet extend out between the connecting plate 72 and the connecting cover, and the thickness of a section of the metal sheet at the bottom edge is less than the thickness of the metal sheet at other positions, and the section of the metal sheet is located between the first fracture groove 81 and the second fracture groove 73.

[0026] Specifically, the cam assembly includes: a cam, a threaded through hole is concentrically arranged at the middle of the cam, and the threaded through hole is used for threaded connection with the elastic shaft assembly 1.

[0027] like Figure 2 As shown, the elastic shaft assembly includes: a connecting rod, an elastic shaft and a pull rod 10, one end of the connecting rod is key-connected to a connecting hole on an engine accessory casing through a first external spline, and the other end of the connecting rod is key-connected to an internal spline on an inner wall of a hollow shaft through a second external spline; one end of the elastic shaft is connected to the end of the connecting rod in the hollow shaft, and the other end of the elastic shaft is provided with a connecting head with an end face having a mounting groove; the outer peripheral surface of one end of the pull rod 10 is provided with an external thread for connecting to a threaded through hole of a cam, the other end of the pull rod 10 is a spherical surface, and a square hole is opened in the center of the spherical surface, a connecting rod is provided in the square hole, and the connecting rod is connected to the spherical surface through a pin provided on the spherical surface, the spherical surface end of the pull rod 10 is connected in the mounting groove of the connecting head, and the end of the pin is slidably connected in the mounting groove of the connecting head.

[0028] Specifically, the connecting plate assembly 3 includes: a connecting plate, which is sleeved on the pull rod 10 between the cam assembly 4 and the hollow shaft 2, and the cam assembly 4, the connecting plate and the end of the hollow shaft 2 are connected by screws.

[0029] Specifically, the hollow shaft 2 is used to mount the main generator rotor, the exciter rotor, the permanent magnet rotor and the fan assembly of the aircraft generator.

[0030] It should be noted that, in the present embodiment, the first fracture groove 81 and the second fracture groove 73 are both arc-shaped 45° sharp grooves, the thinnest part of which is only 0.5 mm thick. The narrowest part of the connecting piece 6 corresponding to the first fracture groove 81 and the second fracture groove 73 is 1 mm, ensuring that the separator connecting cover 8, the connecting piece 6 and the separator connecting seat 7 are quickly disconnected under the action of the threaded screwing torque of the pull rod 10.

[0031] How it works When the fault signal triggers the electromagnetic clutch assembly 5 to respond, the electromagnetic clutch assembly 5 drives the brake assembly 11 to brake the cam. At this time, the elastic shaft assembly 1 continues to rotate under the drag of the engine accessory casing, that is, the threaded end of the rotating pull rod 10 is continuously screwed into the "braked" cam under the action of torque, and the screwing length continues to increase; wherein, the elastic shaft assembly 1 self-adjusts the flexible connection of the connecting shaft to micro-move and automatically adjust within a certain range, and under the action of the threaded screwing torque of the pull rod 10, the elastic shaft assembly 1 is driven to move right until the pull rod 10 enters the separator connecting seat 7 along the guide groove 711 on the guide cylinder 71 of the separator connecting seat 7 in the guide cylinder 71; as the pull rod 10 is continuously screwed in, the pull rod 10 exerts a screwing force on the separator connecting seat 7, so that under the screwing force of the pull rod 10, the separator connecting seat 7 and the separator connecting cover 8 are broken from the corresponding breaking grooves thereon, and at the same time, the connecting piece 6 between the separator connecting seat 7 and the separator connecting cover 8 is pulled off. At this time, the coil assembly of the electromagnetic clutch assembly 5 is disconnected, the electromagnetic clutch assembly 5 stops working, and the elastic shaft assembly 1 continues to screw in until the elastic shaft assembly 1 is separated from the engine accessory casing, thereby preventing the electromagnetic clutch assembly 5 from being falsely triggered due to the fault signal, thereby improving the reliability of fault protection.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure for preventing a clutch coil assembly from being mistakenly connected, characterized in that: include: Hollow shaft; An elastic shaft assembly, one end of which is used to be key-connected with an engine accessory casing, and the other end of which passes through a hollow shaft and is threadedly connected with a cam assembly, wherein the cam assembly is connected to the end surface of the hollow shaft via a connecting plate assembly, wherein the elastic shaft assembly is drivingly connected to the hollow shaft; The electromagnetic clutch assembly has an output end connected to a brake assembly for driving the brake assembly to brake the cam assembly; and a separator connection seat and a separator connection cover, one end of the separator connection seat is inserted into the mounting hole in the middle of the electromagnetic clutch assembly, the other end of the separator connection seat is connected to the separator connection cover, a connection piece is connected between the separator connection cover and the separator connection seat, and the separator connection cover is connected to the shell of the electromagnetic clutch assembly, one end of the connection piece is connected to the coil assembly of the electromagnetic clutch assembly, the other end of the connection piece is grounded, and a breaking groove is also provided in the middle of the separator connection cover and the separator connection seat; Among them, when the electromagnetic clutch assembly drives the brake assembly to brake the cam assembly, the elastic shaft assembly rotates along the thread of the cam assembly and presses against the separator connecting seat until the separator connecting seat and the separator connecting cover break from the breaking groove, and the connecting piece breaks, the coil assembly of the electromagnetic clutch assembly is disconnected, the electromagnetic clutch assembly stops working, and the elastic shaft assembly is detached from the engine accessory casing.

2. A structure for preventing the clutch coil assembly from being mistakenly connected according to claim 1, characterized in that: The separator connecting seat comprises: a connecting plate, on which a guide cylinder is coaxially arranged, wherein the axis of the guide cylinder coincides with the axis of the elastic shaft assembly.

3. A structure for preventing the clutch coil assembly from being mistakenly connected according to claim 2, characterized in that: A guide groove is arranged in the guide tube end facing away from the connecting plate.

4. A structure for preventing the clutch coil assembly from being mistakenly connected according to claim 2, characterized in that: The separator connection cover includes: a connection cover of the same size as the connection disk, a plurality of first fracture grooves evenly distributed around the center of the connection cover, a plurality of second fracture grooves evenly distributed on the connection disk around the center of the connection disk, wherein the connection sheet is pasted between the contact surface of the connection disk and the connection cover.

5. A structure for preventing the clutch coil assembly from being mistakenly connected according to claim 4, characterized in that: Both the connection plate and the connection cover are provided with weight-reducing grooves.

6. The structure for preventing the clutch coil assembly from being mistakenly connected according to claim 4, characterized in that: The connecting sheet is a metal sheet folded back into a boot shape, the bottom edge and the side edge of the boot-shaped metal sheet are located between the connecting plate and the connecting cover, and after the two ends of the metal sheet extend out from between the connecting plate and the connecting cover, one end is connected to the coil assembly of the electromagnetic clutch assembly, and the other end is grounded, and the thickness of a section of the metal sheet at the bottom edge of the boot is less than the thickness of the metal sheet at other positions, and the section of the metal sheet is located between the first fracture groove and the second fracture groove.

7. The structure for preventing the clutch coil assembly from being mistakenly connected according to claim 1, characterized in that: The cam assembly comprises a cam, wherein a threaded through hole is concentrically arranged at the middle of the cam, and the threaded through hole is used for threaded connection with the elastic shaft assembly.

8. The structure for preventing the clutch coil assembly from being mistakenly connected according to claim 7, characterized in that: The elastic shaft assembly includes: A connecting rod, one end of which is key-connected to a connecting hole on an engine accessory casing via a first external spline, and the other end of which is key-connected to an internal spline on an inner wall of a hollow shaft via a second external spline; An elastic shaft, one end of which is connected to the end of the connecting rod in the hollow shaft, and the other end of which is provided with a connector with an installation groove on the end surface; And a pull rod, the outer peripheral surface of one end of which is provided with an external thread for connecting to the threaded through hole of the cam, and the other end of which is a spherical surface, and a square hole is opened in the center of the spherical surface, a connecting rod is arranged in the square hole, and the connecting rod is connected to the spherical surface through a pin arranged on the spherical surface, the spherical surface end of the pull rod is connected to the installation groove of the connecting head, and the end of the pin is slidably connected in the installation groove of the connecting head.

9. The structure for preventing the clutch coil assembly from being mistakenly connected according to claim 8, characterized in that: The connecting disc assembly comprises: a connecting disc which is sleeved on a pull rod between the cam assembly and the hollow shaft, and the cam assembly, the connecting disc and the end of the hollow shaft are connected by screws.

10. The structure for preventing the clutch coil assembly from being mistakenly connected according to claim 1, characterized in that: The hollow shaft is used to install the main generator rotor, exciter rotor, permanent magnet rotor and fan assembly of the aircraft generator.

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