CN115030966A - Friction coupling and switch machine - Google Patents
Friction coupling and switch machine Download PDFInfo
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- CN115030966A CN115030966A CN202210402010.2A CN202210402010A CN115030966A CN 115030966 A CN115030966 A CN 115030966A CN 202210402010 A CN202210402010 A CN 202210402010A CN 115030966 A CN115030966 A CN 115030966A
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- torque
- friction
- friction plate
- input gear
- plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
- F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
- F16D7/024—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces
- F16D7/025—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs
- F16D7/027—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs with multiple lamellae
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/06—Electric devices for operating points or scotch-blocks, e.g. using electromotive driving means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention discloses a friction coupling, which comprises an input gear and a first elastic component, wherein a torque component is rotationally arranged in the input gear, a first friction plate and a second friction plate are arranged in the torque component, the first friction plate is fixedly arranged in the torque component, the second friction plate is connected with an output shaft, the first elastic component enables the second friction plate to be abutted against the first friction plate, when the feedback torque of the output shaft is larger than the set torque, the torque component and the input gear rotate relatively, the force of the first elastic component abutting against the second friction plate is reduced, and the friction force between the first friction plate and the second friction plate is reduced, so that the feedback torque is reduced. The friction coupler and the point switch provided by the invention have simple structures, ensure that the torque fed back by the output shaft every time is in a reasonable range, avoid damage to a motor and simultaneously improve the safety of opening and closing of turnouts.
Description
Technical Field
The invention belongs to the technical field of traffic, and particularly relates to a friction coupling and a point switch.
Background
The railway switch machine is divided into an electric switch machine, an electro-hydraulic switch machine and an electric idle switch machine according to the transmission mode, wherein the electric switch machine consists of a transmission system consisting of an electric motor, a speed reducer, a friction coupling and a ball screw and a signal representation system, the friction coupling plays a role in transmitting torque and an overload protection device in the transmission system, and plays a role in adjusting the output traction force of the switch machine and the overload protection by adjusting an overload protection set value (called as friction conversion force in the railway industry).
When the friction coupling works, the motor rotates to drive the speed reducer, the gear on the speed reducer is meshed with the outer teeth of the gear with the groove, the inner friction plate and the first friction plate are extruded together, so that the gear with the groove can drive the outer friction plate, the coupling shaft is driven by the inner friction plate, the torque is output by the output shaft, and the whole assembly of the point switch is driven to complete the function of switching points. Once the resistance of the turnout is too large and exceeds a standard value in the conversion process, the motor does not stop at the moment, so that the inner friction plate stops along with the output shaft due to overlarge traction load, the outer friction plate rotates along with the grooved gear, namely friction is generated between the inner friction plate and the outer friction plate, and the motor is protected from being damaged due to overload.
Because the inner friction plate and the outer friction plate are in dry friction and are under the extrusion of the small spring for a long time, when the external load of the point switch is suddenly increased to exceed the friction conversion force, the inner friction plate and the outer friction plate are often adhered to each other, and the relative rotation friction cannot be realized, so that the output shaft of the motor is locked and clamped because the friction coupler does not generate friction movement, and the motor is burnt down when the friction coupler is serious; or the friction value of the inner friction plate and the outer friction plate is very large in the moment of relative motion from static state to dynamic state, the friction force is unstable and even locked, and certain potential safety hazards are caused to the opening and closing of the motor and the turnout junction.
Therefore, there is a need to design a friction coupling and a switch machine to solve the above-mentioned problems of unstable friction, damage to the motor and influence on the safety of opening and closing the switch.
Disclosure of Invention
In order to solve the technical problems of unstable friction force, damage to a motor and influence on the safety of opening and closing of a turnout in the background technology, a friction coupling and a point switch are provided to solve the problems.
In order to achieve the above object, the friction coupling and the switch machine according to the present invention have the following specific technical solutions:
a friction coupler comprises an input gear and a first elastic assembly, wherein a torque assembly is arranged in the input gear in a rotating mode, a first friction plate and a second friction plate are arranged in the torque assembly, the first friction plate is fixedly arranged in the torque assembly, the second friction plate is connected with an output shaft, the first elastic assembly enables the second friction plate to abut against the first friction plate, when the feedback torque of the output shaft is larger than a set torque, the torque assembly rotates relative to the input gear, the force of the first elastic assembly abutting against the second friction plate is reduced, and the friction force between the first friction plate and the second friction plate is reduced, so that the feedback torque is reduced.
Further, be provided with plane portion and depressed part on the moment subassembly, first elastic component and plane portion butt, when feedback moment is greater than the setting value, moment subassembly and input gear rotate relatively, and first elastic component is by plane portion butt to depressed part, makes the power of first elastic component butt on the second friction disc reduce.
Further, the moment subassembly includes the connecting plate, and connecting plate one side and second friction disc butt, another side and first elastic component butt, plane portion all set up the one side that is close to first elastic component at the connecting plate with the depressed part.
Further, the plane portions and the recessed portions are alternately arranged in the circumferential direction of the connecting plate.
Further, the torque assembly further comprises a torque frame, the torque frame is rotatably arranged in the input gear, the first friction plate, the second friction plate and the connecting plate are arranged in the torque frame, and the second friction plate is arranged between the first friction plate and the connecting plate.
Furthermore, the input gear is provided with a first groove along the circumferential direction, the torque frame is provided with a first protrusion along the circumferential direction, the first protrusion is arranged in the first groove, and the width of the first protrusion is smaller than that of the first groove, so that the torque frame can rotate by an angle in the input gear.
And when the feedback moment is greater than a set value, the second elastic component drives the moment frame to rotate in the input gear by an angle so that the first elastic component is abutted to the recessed part from the plane part.
Further, the torque adjusting device comprises an end cover, the end cover is connected with the input gear, a first arc-shaped groove is formed in the end cover, a second arc-shaped groove is formed in the torque frame, the first arc-shaped groove and the second arc-shaped groove are in one-to-one correspondence, an arc-shaped cavity is formed between the first arc-shaped groove and the second arc-shaped groove in a surrounding mode, the second elastic assembly is arranged in the arc-shaped cavity, and the second elastic assembly is used for adjusting the rotating angle of the torque frame in the input gear.
Further, the second elastic component comprises two abutting parts and a second elastic part, the two abutting parts are respectively arranged at two ends of the arc-shaped cavity, the second elastic part is arranged between the two abutting parts, and the second elastic part is used for abutting the two abutting parts at two ends of the arc-shaped cavity.
Further, still include the mount, the mount is connected with input gear, has seted up the through-hole on the mount, and first elastic component passes through the through-hole and the connecting plate butt.
Furthermore, first elastic component includes guide cylinder and first elastic component, and the guide cylinder sets up in the through-hole, and first elastic component passes guide cylinder and connecting plate butt.
Further, the first elastic component further comprises a ball, the ball is arranged between the first elastic piece and the connecting plate, and when the fed-back torque is larger than the set torque, the ball is abutted to the recessed portion through the plane portion, so that the force of the first elastic piece abutting to the second friction plate is reduced.
Further, still include the regulation lid, adjust the lid and set up at the mount, adjust the one end that the lid butt kept away from the connecting plate at first elastic component for adjust the elasticity of first elastic component.
A switch machine comprising a friction coupling as described above.
The friction coupling and the switch machine of the invention have the following advantages:
the torque is input into the output shaft through the input gear, the first elastic component abuts against the plane portion, the input gear and the torque component rotate synchronously, the first friction plate and the second friction plate rub against each other, and the torque is output to the output shaft through the second friction plate; when the moment that the output shaft feedbacks is greater than the moment of settlement, in order to reduce the moment that the output shaft feedbacks, do not cause the harm to the motor, second elastic component drive moment subassembly is at input gear internal rotation angle, first elastic component is by plane portion butt in the depressed part, make the butt power between first elastic component and the second friction disc reduce, frictional force between first friction disc and the second friction disc reduces, the moment that makes input gear receive reduces, reach the effect of protection motor, promote the life-span of motor, moreover, the steam generator is simple in structure, guarantee that the moment that the output shaft feedbacks is stable, avoid causing the harm to the motor, the security of switch switching has been improved simultaneously.
Drawings
FIG. 1 is a schematic view of the construction of the friction coupling of the present invention;
FIG. 2 is a schematic illustration of an exploded construction of the friction coupling of the present invention;
FIG. 3 is a second schematic view of an exploded structure of the friction coupling of the present invention;
FIG. 4 is a cross-sectional view of a friction coupling according to a second embodiment of the present invention;
FIG. 5 is a schematic view of the input gear and torque frame of the present invention;
FIG. 6 is a schematic view of the input gear of the present invention;
FIG. 7 is a schematic view of the torque assembly of the present invention;
FIG. 8 is a first schematic view of the torque frame of the present invention;
FIG. 9 is a second schematic structural view of the torque frame of the present invention;
FIG. 10 is a schematic structural view of a first friction plate according to the present invention;
FIG. 11 is a structural schematic view of a second friction plate of the present invention;
FIG. 12 is a schematic structural view of a connecting plate according to the present invention;
FIG. 13 is a first schematic view of a first elastic element according to the present invention;
FIG. 14 is a second schematic structural view of a first elastic element of the present invention;
FIG. 15 is a schematic structural view of a second elastic component according to the present invention.
The symbols in the figure illustrate:
1. an input gear; 11. a first groove; 2. a torque assembly; 21. a moment frame; 211. a first protrusion; 212. a baffle plate; 2121. a second arc-shaped slot; 22. a first friction plate; 221. a second protrusion; 23. a second friction plate; 231. a third protrusion; 24. a connecting plate; 241. a planar portion; 242. a recessed portion; 243. a fourth protrusion; 3. a first elastic member; 31. a guide cylinder; 32. a first elastic member; 33. a ball bearing; 4. a fixed mount; 41. a through hole; 5. an adjusting cover; 6. a second elastic member; 61. an abutting member; 62. a second elastic member; 7. an end cap; 71. a first arc-shaped slot; 72. a slideway; 73. a third groove; 74. shifting blocks; 8. an output shaft; 81. a second groove; 9. a bearing; 10. and (7) oil sealing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The friction coupling and the switch machine according to the invention will be described with reference to the accompanying figures 1 to 15.
Dry friction is formed between the second friction plate 23 and the first friction plate 22 in the friction coupler, when the external load of the switch machine is suddenly increased to exceed the friction conversion force, the second friction plate 23 and the first friction plate 22 are often adhered to each other, relative rotation friction cannot be realized, the output shaft 8 is locked and clamped because the friction coupler does not generate friction movement, and the motor is burnt in serious cases; or the instantaneous friction value of the relative movement between the second friction plate 23 and the first friction plate 22 is very large from static state to dynamic state, so that a large surge starting current is formed, and the influence on a circuit system is caused, so that a friction coupling needs to be designed, the motor can be protected, and meanwhile, unstable torque can be changed into stable torque.
As shown in fig. 1 to 6, the friction coupling according to the present invention includes an input gear 1 and a first elastic component 3, a torque component 2 is rotatably disposed in the input gear 1, a first friction plate 22 and a second friction plate 23 are disposed in the torque component 2, the first friction plate 22 is fixedly disposed in the torque component 2, the second friction plate 23 is connected to an output shaft 8, the first elastic component 3 enables the second friction plate 23 to abut against the first friction plate 22, when a feedback torque of the output shaft 8 is greater than a set torque, the torque component 2 and the input gear 1 rotate relatively, a force of the first elastic component 3 abutting against the second friction plate 23 is reduced, and a friction force between the first friction plate 22 and the second friction plate 23 is reduced, so that the feedback torque is reduced. In this embodiment, the first friction plate 22 is an outer friction plate, and the second friction plate 23 is an inner friction plate.
Torque is input into the output shaft 8 through the input gear 1, the first elastic component 3 abuts against the plane portion 241, the input gear 1 and the torque component 2 rotate synchronously, the first friction plate 22 and the second friction plate 23 rub against each other, and the torque is output to the output shaft 8 through the second friction plate 23; when the moment that the output shaft 8 feedbacks is greater than the moment of settlement, in order to reduce the moment that output shaft 8 feedbacks, do not cause the harm to the motor, second elastic component 6 takes moment subassembly 2 of power to rotate angle in input gear 1, first elastic component 3 is by plane portion 241 butt at depressed part 242, make the butt power between first elastic component 3 and the second friction disc 23 reduce, frictional force between first friction disc 22 and the second friction disc 23 reduces, make the moment that input gear 1 received reduce, reach the effect of protection motor, promote the life-span of motor, moreover, the steam generator is simple in structure, the moment that guarantees output shaft 8 feedbacks is stable, avoid causing the harm to the motor, the security of switch switching has been improved simultaneously.
Further, as shown in fig. 1 to 8, the torque assembly 2 further includes a torque frame 21, the torque frame 21 is rotatably disposed in the input gear 1, the first friction plate 22 and the second friction plate 23 are disposed in the torque frame 21, the input gear 1 is provided with a first groove 11 along the circumferential direction, the torque frame 21 is provided with a first protrusion 211 along the circumferential direction, the width of the first protrusion 211 is smaller than the width of the first groove 11, so that the torque frame 21 can rotate a certain angle in the input gear 1, the plurality of first grooves 11 are uniformly distributed in the circumferential direction of the input gear 1, the plurality of first protrusions 211 are also uniformly distributed in the circumferential direction of the torque frame 21, and each first protrusion 211 corresponds to one first groove 11. The width of the first protrusion 211 is designed to be smaller than the width of the first groove 11, so that the torque frame 21 can rotate by a certain angle along the axial direction of the input gear 1, meanwhile, the first protrusion 211 is arranged in the first groove 11, the torque frame 21 can only rotate by a certain angle in the input gear 1 but cannot rotate all the time through the limitation of the first groove 11 on the first protrusion 211, when the fed-back torque is small, the input gear 1 can drive the torque assembly 2 to rotate together, in the embodiment, the rotatable angle of the torque frame 21 in the first groove 11 is within 6 °, and in other embodiments, the rotatable angle of the torque frame 21 in the first groove 11 can be set according to the actual required conditions.
Further, as shown in fig. 6 to 10, the first friction plate 22 is fixedly disposed in the torque frame 21, specifically, the first friction plate 22 is provided with a second protrusion 221, the second protrusion 221 is matched with the inside of the first protrusion 211 of the torque frame 21, the first friction plate 22 can be limited in the torque frame 21, one end of the torque frame 21 is provided with a baffle 212, the first friction plate 22 abuts against the baffle 212, the first friction plate 22 is further limited in the torque frame 21, the first friction plate 22 is uniformly provided with a plurality of second protrusions 221 along the circumferential direction thereof, each second protrusion 221 is correspondingly disposed in one first protrusion 211, in this embodiment, four second protrusions 221 are provided, and four first protrusions 211 are provided. In this embodiment, one surface of the second friction plate 23 contacts with the first friction plate 22, and the other surface of the second friction plate 23 contacts with the second elastic component 6, so that the second friction plate 23 is in close contact with the first friction plate 22 under the elastic force of the second elastic component 6, so that a friction force can be generated between the second friction plate 23 and the first friction plate 22, the force is transmitted from the input gear 1 to the torque frame 21, the torque frame 21 transmits the force to the first friction plate 22, and the second friction plate 23 transmits the force to the output shaft 8 under the friction force with the first friction plate 22. In this embodiment, in order to make full use of the friction between the first friction plate 22 and the second friction plate 23, the second friction plate 23 is disposed close to the baffle plate 212, two first friction plates 22 and three second friction plates 23 are disposed, and one first friction plate 22 is disposed between every two third friction plates 23, so that when the input gear 1 transmits force to the first friction plate 22, the second friction plate 23 is disposed on both side surfaces of the first friction plate 22, and the friction is made full use of, and the specific distribution sequence is that the baffle plate 212, the second friction plate 23, the first friction plate 22, and the second friction plate 23. In other embodiments, a plurality of first friction plates 22 and a plurality of second friction plates 23 may be provided according to actual needs, as long as the first friction plates 22 and the second friction plates 23 are alternately arranged.
Further, as shown in fig. 6 to 12, the torque assembly 2 is provided with a plane portion 241 and a recessed portion 242, the first elastic assembly 3 abuts against the plane portion 241, when the torque fed back by the output shaft 8 is larger than a set value, the torque assembly 2 rotates within the input gear 1 by an angle, so that the first elastic assembly 3 abuts against the recessed portion 242 from the plane portion 241, the force of the first elastic assembly 3 abutting against the second friction plate 23 is reduced, the friction force between the first friction plate 22 and the second friction plate 23 is reduced, the force fed back is reduced, and the function of protecting the motor is achieved.
Further, as shown in fig. 6 to 12, the torque assembly 2 includes a connecting plate 24, the second friction plate 23 is disposed between the first friction plate 22 and the connecting plate 24, the connecting plate 24 is slidably disposed along the axial direction of the torque frame 21, one surface of the connecting plate 24 abuts against the second friction plate 23, the other surface abuts against the first elastic assembly 3, the planar portions 241 and the recessed portions 242 are both disposed on one surface of the connecting plate 24 close to the first elastic assembly 3, and the planar portions 241 and the recessed portions 242 are alternately arranged along the circumferential direction of the connecting plate 24. When the first elastic component 3 abuts against the plane portion 241 and the feedback torque is larger than the set value, the torque component 2 rotates within the input gear 1 by an angle, so that the first elastic component 3 abuts against the recessed portion 242 from the plane portion 241, the force of the first elastic component 3 abutting against the second friction plate 23 is reduced, the friction force between the second friction plate 23 and the first friction plate 22 is reduced, and the force fed back by the output shaft 8 is reduced. In this embodiment, the connecting plate 24 and the first friction plate 22 have the same shape, the connecting plate 24 is provided with the fourth protrusion 243, the fourth protrusion 243 is matched with the inside of the first protrusion 211 of the torque frame 21, so that the connecting plate 24 can be limited in the torque frame 21, but the connecting plate 24 can move along the axis direction of the torque frame 21, so that when the first elastic component 3 abuts against the connecting plate 24, the elastic force of the first elastic component 3 is adjusted, the connecting plate 24 can be pushed to move along the axis direction of the torque frame 21, and then the contact force between the second friction plate 23 and the first friction plate 22 can be changed, and further the magnitude of the friction force between the first friction plate 22 and the second friction plate 23 is changed, and the effect of adjusting the force fed back by the output shaft 8 is achieved. Avoid causing the harm to the motor, improved the security of switch switching.
Further, as shown in fig. 1 to 4, the friction coupling of the present invention further includes a fixing frame 4, the fixing frame 4 is connected to the input gear 1, a through hole 41 is formed on the fixing frame 4, and the first elastic component 3 passes through the through hole 41 and abuts against the connecting plate 24. Specifically, the first elastic assembly 3 includes a guide cylinder 31 and a first elastic member 32, the guide cylinder 31 is disposed in the through hole 41, the first elastic member 32 passes through the guide cylinder 31 and abuts against the connecting plate 24, and the magnitude of the contact force between the second friction plate 23 and the first friction plate 22 is adjusted by the first elastic member 32. In this embodiment, twelve through holes 41 are formed in the fixing frame 4, the twelve through holes 41 are uniformly distributed along the circumferential direction of the fixing frame 4, the first elastic component 3 is arranged in each through hole 41, and under the combined action of the twelve first elastic components 3, the stress on each part of the connecting plate 24 contacting with the first elastic component 3 can be uniform, so that the uniform stress between the connecting plate 24 and the second friction plate 23 is ensured.
Further, as shown in fig. 4 and 15, the first elastic component 3 further includes balls 33, the balls 33 are disposed between the first elastic member 32 and the connecting plate 24, when the feedback torque is smaller than the set torque, the balls 33 abut against the plane portion 241, the first elastic member 32 is not deformed, when the feedback torque is larger than the set torque, the balls 33 abut against the recessed portion 242, the first elastic member 32 is deformed, so as to reduce the abutting force against the second friction plate 23, and since the balls 33 are spherical, the balls 33 are disposed such that the balls 33 can be conveniently moved between the plane portion 241 and the recessed portion 242, so as to reduce the frictional resistance and improve the working efficiency.
Further, as shown in fig. 1 to 4, the friction coupling of the present invention further includes an adjusting cover 5, the adjusting cover 5 is disposed on the fixing frame 4, in this embodiment, the adjusting cover 5 is rotatably disposed on the fixing frame 4, the adjusting cover 5 abuts against one end of the first elastic member 32 away from the connecting plate 24, and is used for adjusting the elastic force of the first elastic member 32, when the elastic force of the first elastic member 32 on the connecting plate 24 needs to be increased, the adjusting cover 5 only needs to be rotated into the fixing frame 4 in a direction close to the first elastic member 32, and when the elastic force of the first elastic member 32 on the connecting plate 24 needs to be decreased, the adjusting cover 5 only needs to be rotated in a direction away from the first elastic member 32, so that the operation is simple and convenient.
As shown in fig. 12, the friction coupling of the present invention further includes a second elastic member 6 and an end cap 7, the second elastic member 6 is connected to the torque frame 21, and when the feedback torque is larger than a predetermined value, the second elastic member 6 drives the torque frame 21 to rotate within the input gear 1 by an angle such that the first elastic member 32 abuts against the recessed portion 242 from the flat surface portion 241. In this embodiment, the end cover 7 is connected with the input gear 1, the end cover 7 is rotatably provided with an output shaft 8, and the output shaft 8 penetrates through the end cover 7 to be connected with the second friction plate 23. The output shaft 8 is provided with a second groove 81, the second friction plate 23 is provided with a third protrusion 231, and the third protrusion 231 is inserted into the second groove 81, so that the second friction plate 23 and the output shaft 8 rotate synchronously, and the force can be output to the output shaft 8 through the second friction plate 23. The two ends of the output shaft 8 are provided with bearings 9 which are rotatably arranged on the end cover 7 and the fixed frame 4 through the bearings 9, and the two ends of the output shaft 8 are also provided with oil seals 10 for sealing treatment. The end cover 7 is connected with the input gear 1, a first arc-shaped groove 71 is formed in the end cover 7, a second arc-shaped groove 2121 is formed in the torque frame 21, the first arc-shaped groove 71 and the second arc-shaped groove 2121 are arranged in a one-to-one correspondence mode, an arc-shaped cavity is defined between the first arc-shaped groove 71 and the second arc-shaped groove 2121 in a surrounding mode, a second elastic assembly 6 is arranged in the arc-shaped cavity, and the second elastic assembly 6 is used for adjusting the rotation angle of the torque frame 21 in the input gear 1.
Further, as shown in fig. 12, the second elastic assembly 6 includes two abutting pieces 61 and a second elastic piece 62, the two abutting pieces 61 are respectively disposed at two ends of the arc-shaped cavity, the second elastic piece 62 is disposed between the two abutting pieces 61, and the second elastic piece 62 is used for abutting the two abutting pieces 61 at two ends of the arc-shaped cavity. Meanwhile, the end cover 7 and the moment frame 21 can move synchronously due to the elastic force of the second elastic piece 62 abutting against the two abutting pieces 61. In this embodiment, the abutting member 61 may be two spheres.
In another embodiment, as shown in fig. 13, the two abutting pieces 61 may also be square blocks, the middle of each square block is provided with an inward recess, the second elastic piece 62 is placed in the recess, the end cover 7 is provided with a third groove 73 for placing the square block, the end cover 7 is also provided with a slide way 72, the slide way 72 is communicated with the third groove 73, the shifting block 74 is arranged in the slide way 72, and the square blocks are extruded by the sliding of the shifting block 74 in the slide way 72, so that the length of the second elastic piece 62 can be changed and elastic deformation can be generated. Meanwhile, the end cover 7 and the baffle 212 are connected by the shifting block 74, the second elastic piece 62 can be extruded by the shifting block 74 to generate elastic deformation, and meanwhile, the end cover 7 and the baffle 212 can synchronously rotate by the shifting block 74. In other embodiments, the abutting member 61 may be designed in other shapes as long as it can abut against the second elastic member 62 and ensure the effect of synchronously moving the end cap 7 and the moment frame 21.
The invention also provides a switch machine comprising a friction coupling as described above.
The principle of operation of the friction coupling of the present invention is as follows:
normally, the two abutting members 61 abut against two ends of the arc-shaped cavity, because a part of the two abutting members 61 is located in the second arc-shaped slot 2121 of the baffle plate 212, the moment frame 21 and the end cover 7 can rotate synchronously, and because the two abutting members 61 abut against two ends of the arc-shaped cavity, the moment frame 21 can not rotate angularly in the input gear 1, so that the moment frame 21 and the input gear 1 rotate synchronously, the balls 33 abut against the plane portion 241, that is, the first elastic member 32 abuts against the plane portion 241, friction force is generated between the second friction plate 23 and the first friction plate 22, force is transmitted from the input gear 1 to the first friction plate 22, and the first friction plate 22 is transmitted to the second friction plate 23 through friction force, and is transmitted to the output shaft 8 by the second friction plate 23.
When the torque fed back by the output shaft 8 is greater than the set torque, one of the two abutting members 61 presses the other abutting member 61, and at the same time, due to the force applied, the abutting member 61 presses one end of the arc-shaped cavity, so that the torque frame 21 is angularly deflected in the input gear 1, and after the torque frame 21 is angularly deflected, the connecting plate 24 in the torque frame 21 is angularly deflected, and since the first elastic element 3 is originally abutted against the plane portion 241 of the connecting plate 24, since the connecting plate 24 rotates, the first elastic element 3 abuts against the recess 242 of the connecting plate 24, so that the first elastic element 32 is deformed and extended, the elastic force of the first elastic element 32 is reduced, the abutting force on the second friction plate 23 is reduced, and further the friction force between the second friction plate 23 and the first friction plate 22 is reduced, so as to reduce the force fed back, no matter whether the torque fed back to the motor by the output shaft 8 is less than the set torque or greater than the set torque, through the regulation of first elastic component 3 and second elastic component 6, all can reduce power to and close numerical range, avoid causing the harm to the motor, improve the life of motor, improve the security of switch switching simultaneously.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (14)
1. A friction coupling is characterized by comprising an input gear and a first elastic component, wherein a torque component is arranged in the input gear in a rotating mode, a first friction plate and a second friction plate are arranged in the torque component, the first friction plate is fixedly arranged in the torque component, the second friction plate is connected with an output shaft, the first elastic component enables the second friction plate to abut against the first friction plate, when the feedback torque of the output shaft is larger than a set torque, the torque component and the input gear rotate relatively, the force of the first elastic component abutting against the second friction plate is reduced, and the friction force between the first friction plate and the second friction plate is reduced, so that the feedback torque is reduced.
2. The friction coupling according to claim 1, wherein the torque member is provided with a flat surface portion and a recessed portion, the first elastic member abuts against the flat surface portion, the torque member rotates relative to the input gear when the feedback torque is larger than a set value, and the first elastic member abuts against the recessed portion from the flat surface portion, so that a force with which the first elastic member abuts against the second friction plate is reduced.
3. A friction coupling according to claim 2, wherein the torque assembly includes a connecting plate, one face of the connecting plate abuts against the second friction plate and the other face abuts against the first resilient assembly, and the flat portion and the recessed portion are provided on a face of the connecting plate adjacent to the first resilient assembly.
4. The friction coupling according to claim 3, wherein the flat portions and the recessed portions are alternately arranged in a circumferential direction of the connecting plate.
5. A friction coupling according to claim 3 wherein the torque assembly further comprises a torque carrier rotatably disposed within the input gear, the first friction plate, the second friction plate and the connecting plate all disposed within the torque carrier, the second friction plate disposed between the first friction plate and the connecting plate.
6. The friction coupling of claim 5, wherein the input gear is provided with a first groove in a circumferential direction, the torque frame is provided with a first protrusion in the circumferential direction, the first protrusion is disposed in the first groove, and a width of the first protrusion is smaller than a width of the first groove so that the torque frame rotates in the input gear by an angle.
7. The friction coupling of claim 5, further comprising a second resilient member coupled to the torque frame, wherein the second resilient member drives the torque frame to rotate within the input gear by an angle when the feedback torque is greater than the predetermined value, such that the first resilient member abuts the recess from the flat portion.
8. The friction coupling of claim 7, further comprising an end cap, wherein the end cap is connected to the input gear, the end cap is provided with a first arc-shaped groove, the torque frame is provided with a second arc-shaped groove, the first arc-shaped groove and the second arc-shaped groove are arranged in a one-to-one correspondence, an arc-shaped cavity is defined between the first arc-shaped groove and the second arc-shaped groove, the second elastic component is arranged in the arc-shaped cavity, and the second elastic component is used for adjusting a rotation angle of the torque frame in the input gear.
9. The friction coupling according to claim 8, wherein the second elastic member includes two abutting members respectively provided at both ends of the arcuate chamber and a second elastic member provided between the two abutting members for abutting the two abutting members at both ends of the arcuate chamber.
10. The friction coupling according to claim 1, further comprising a fixing frame, wherein the fixing frame is connected with the input gear, a through hole is formed in the fixing frame, and the first elastic member passes through the through hole and abuts against the connecting plate.
11. The friction coupling of claim 10, wherein the first resilient member includes a guide cylinder disposed in the through-hole and a first resilient member passing through the guide cylinder to abut the connecting plate.
12. The friction coupling according to claim 11, wherein the first elastic member further comprises a ball disposed between the first elastic member and the connecting plate, and the ball is abutted against the recess by the flat portion when the fed-back torque is larger than the set torque, so that a force of the first elastic member abutting against the second friction plate is reduced.
13. The friction coupling according to claim 11, further comprising an adjustment cover disposed on the fixing frame, the adjustment cover abutting against an end of the first elastic member away from the connection plate for adjusting an elastic force of the first elastic member.
14. A switch machine, characterized in that it comprises a friction coupling according to any one of claims 1 to 13.
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| CN202210402010.2A CN115030966B (en) | 2022-04-18 | 2022-04-18 | Friction coupling and switch machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210402010.2A CN115030966B (en) | 2022-04-18 | 2022-04-18 | Friction coupling and switch machine |
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| CN115030966B CN115030966B (en) | 2023-08-01 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011764A (en) * | 2002-06-06 | 2004-01-15 | Kawasaki Heavy Ind Ltd | Friction clutch for vehicle |
| US20090301836A1 (en) * | 2006-08-11 | 2009-12-10 | Shimadzu Corporation | Torque limiting mechanism |
| CN204458892U (en) * | 2015-02-15 | 2015-07-08 | 利恩传动设备（常州）有限公司 | Torque limiter |
| CN110520644A (en) * | 2017-04-18 | 2019-11-29 | 小仓离合器有限公司 | Friction clutch |
| CN111878517A (en) * | 2020-08-13 | 2020-11-03 | 西安天宝信号技术有限公司 | Bidirectional adjustment friction coupling for electric switch machine |
| CN217401487U (en) * | 2022-04-18 | 2022-09-09 | 天津君亚沃德科技发展有限公司 | Friction coupling and switch machine |
-
2022
- 2022-04-18 CN CN202210402010.2A patent/CN115030966B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004011764A (en) * | 2002-06-06 | 2004-01-15 | Kawasaki Heavy Ind Ltd | Friction clutch for vehicle |
| US20090301836A1 (en) * | 2006-08-11 | 2009-12-10 | Shimadzu Corporation | Torque limiting mechanism |
| CN204458892U (en) * | 2015-02-15 | 2015-07-08 | 利恩传动设备（常州）有限公司 | Torque limiter |
| CN110520644A (en) * | 2017-04-18 | 2019-11-29 | 小仓离合器有限公司 | Friction clutch |
| CN111878517A (en) * | 2020-08-13 | 2020-11-03 | 西安天宝信号技术有限公司 | Bidirectional adjustment friction coupling for electric switch machine |
| CN217401487U (en) * | 2022-04-18 | 2022-09-09 | 天津君亚沃德科技发展有限公司 | Friction coupling and switch machine |
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| CN115030966B (en) | 2023-08-01 |
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