CN115030966B - Friction coupling and switch machine - Google Patents
Friction coupling and switch machine Download PDFInfo
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- CN115030966B CN115030966B CN202210402010.2A CN202210402010A CN115030966B CN 115030966 B CN115030966 B CN 115030966B CN 202210402010 A CN202210402010 A CN 202210402010A CN 115030966 B CN115030966 B CN 115030966B
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- friction
- moment
- input gear
- torque
- friction plate
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Classifications
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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)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a friction coupler which comprises an input gear and a first elastic component, wherein a moment component is rotatably arranged in the input gear, a first friction plate and a second friction plate are arranged in the moment component, the first friction plate is fixedly arranged in the moment 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 moment of the output shaft is larger than a set moment, the moment component and the input gear rotate relatively, the force of the first elastic component abutted 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 moment is reduced. The friction coupler and the switch machine provided by the invention have simple structures, ensure that the moment fed back by the output shaft each time is in a reasonable range, avoid damaging the motor, and improve the safety of switch opening and closing.
Description
Technical Field
The invention belongs to the technical field of traffic, and particularly relates to a friction coupler and a point switch.
Background
The railway switch machine is divided into an electric switch machine, an electrohydraulic switch machine and an electric air switch machine according to a transmission mode, wherein the electric switch machine consists of a transmission system consisting of a motor, a speed reducer, a friction coupler and a ball screw and a signal indicating system, the friction coupler plays roles of transmitting torque and overload protection in the transmission system, and the output traction force of the switch machine and overload protection are regulated by regulating an overload protection set value (called friction conversion force in railway industry).
When the friction coupler works, the motor rotates to drive the reducer, the gear on the reducer is meshed with the external teeth of the grooved gear, and the grooved gear can drive the external friction plate as the internal friction plate and the first friction plate are extruded together, and the coupler shaft is driven by the internal friction plate, so that torque is output by the output shaft, and the whole assembly of the switch machine is driven to complete the function of switching the turnout. Once the resistance of the turnout is overlarge in the conversion process and exceeds the standard value, the motor is not stopped at the moment, so that the inner friction plate stops along with the output shaft due to overlarge traction load, and the outer friction plate rotates along with the grooved gear, namely, friction is generated between the inner friction plate and the outer friction plate, so that 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 a small spring for a long time, when the external load of the switch machine suddenly increases to exceed the friction conversion force, adhesion often occurs between the inner friction plate and the outer friction plate, the relative rotation friction cannot be realized, the motor output shaft is locked and blocked because the friction coupler does not generate friction motion, and the motor is burnt out seriously; or the friction force value is very large at the moment of relative movement between the inner friction plate and the outer friction plate from static state to dynamic state, the friction force is unstable and even locked, and certain potential safety hazards are caused for opening and closing of the motor and the turnout.
Therefore, it is necessary to design the friction coupling and the switch machine to solve the above-mentioned problems of unstable friction force, damage to the motor, and influence on the switch safety.
Disclosure of Invention
In order to solve the technical problems of unstable friction force, damage to a motor and influence on the safety of switch opening and closing in the prior art, a friction coupler and a switch machine 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 scheme:
the utility model provides a friction coupling, including input gear and first elastic component, the rotation is provided with moment subassembly in the input gear, be provided with first friction disc and second friction disc in the moment subassembly, first friction disc is fixed to be set up in the moment subassembly, the output shaft is connected to the second friction disc, first elastic component makes second friction disc butt at first friction disc, when the feedback moment of output shaft is greater than the settlement moment, moment subassembly and input gear rotate relatively, the force of first elastic component butt at the second friction disc reduces, friction force between first friction disc and the second friction disc reduces, so that the moment of feedback reduces.
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 relative rotation, 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, moment subassembly includes the connecting plate, and connecting plate one side and second friction disc butt, another side and first elastic component butt, and plane portion and depressed part all set up in the connecting plate one side that is close to first elastic component.
Further, the planar portions and the recessed portions are alternately arranged in the circumferential direction of the connecting plate.
Further, the moment assembly further comprises a moment frame, the moment frame is rotatably arranged in the input gear, the first friction plate, the second friction plate and the connecting plate are all arranged in the moment frame, and the second friction plate is arranged between the first friction plate and the connecting plate.
Further, the input gear is provided with a first groove along the circumferential direction, the moment 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 moment frame rotates at an angle in the input gear.
Further, the device further comprises a second elastic component, wherein the second elastic component is connected with the moment frame, and when the feedback moment is larger 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 concave part from the plane part.
Further, still include the end cover, the end cover is connected with input gear, has seted up first arc wall on the end cover, has seted up the second arc wall on the moment frame, and first arc wall and second arc wall one-to-one set up, enclose into the arc chamber between first arc wall and the second arc wall, and the second elastic component sets up in the arc intracavity, and the second elastic component is used for adjusting moment frame rotation angle in input gear.
Further, the second elastic component comprises two abutting pieces and a second elastic piece, the two abutting pieces are respectively arranged at two ends of the arc-shaped cavity, the second elastic piece is arranged between the two abutting pieces, and the second elastic piece is used for abutting the two abutting pieces at two ends of the arc-shaped cavity.
Further, still include the mount, mount and input gear connection have seted up the through-hole on the mount, and first elastic component passes through the through-hole and the connecting plate butt.
Further, the first elastic component comprises a guide cylinder and a first elastic piece, the guide cylinder is arranged in the through hole, and the first elastic piece passes through the guide cylinder to be abutted with the connecting plate.
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 feedback moment is larger than the set moment, the ball is abutted against the concave part through the plane part, so that the force of the first elastic piece abutted against the second friction plate is reduced.
Further, still include adjusting the lid, adjust the lid setting and be in the mount, adjust the lid butt and keep away from the one end of 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 have the following advantages:
the torque is input to the output shaft through the input gear, the first elastic component is abutted to the plane part, the input gear and the torque component synchronously rotate, the first friction plate and the second friction plate are mutually rubbed, and the torque is output to the output shaft through the second friction plate; when the moment fed back by the output shaft is larger than the set moment, the moment fed back by the output shaft is not damaged to the motor, the second elastic component is provided with a moment component to rotate at an angle in the input gear, the first elastic component is abutted to the concave part by the plane part, so that the abutting force between the first elastic component and the second friction plate is reduced, the friction force between the first friction plate and the second friction plate is reduced, the moment received by the input gear is reduced, the effect of protecting the motor is achieved, the service life of the motor is prolonged, the structure is simple, the stability of the moment fed back by the output shaft is ensured, the damage to the motor is avoided, and meanwhile, the safety of turnout opening and closing is improved.
Drawings
FIG. 1 is a schematic view of a friction coupling according to the present invention;
FIG. 2 is a schematic view of an exploded view of the friction coupling of the present invention;
FIG. 3 is a schematic diagram of a friction coupling of the present invention in a second exploded configuration;
FIG. 4 is a schematic cross-sectional view of a friction coupling according to the present invention;
FIG. 5 is a schematic diagram of the input gear and torque frame configuration of the present invention;
FIG. 6 is a schematic diagram of the input gear of the present invention;
FIG. 7 is a schematic diagram of a torque assembly according to the present invention;
FIG. 8 is a schematic diagram of a moment frame according to the present invention;
FIG. 9 is a second schematic structural view of the moment frame of the present invention;
FIG. 10 is a schematic view of the structure of a first friction plate according to the present invention;
FIG. 11 is a schematic view of a second friction plate according to the present invention;
FIG. 12 is a schematic view of a structure of a connecting plate according to the present invention;
FIG. 13 is a schematic view of a first elastic member according to the present invention;
FIG. 14 is a second schematic structural view of the first elastic member of the present invention;
fig. 15 is a schematic structural view of a second elastic component of the present invention.
The figure indicates:
1. an input gear; 11. a first groove; 2. a torque assembly; 21. a moment frame; 211. a first protrusion; 212. a baffle; 2121. a second arc-shaped groove; 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 component; 31. a guide cylinder; 32. a first elastic member; 33. a ball; 4. a fixing frame; 41. a through hole; 5. an adjustment cover; 6. a second elastic component; 61. an abutment; 62. a second elastic member; 7. an end cap; 71. a first arc-shaped groove; 72. a slideway; 73. a third groove; 74. a shifting block; 8. an output shaft; 81. and a second groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The technical features of the different embodiments of the invention described below may be combined with one another as long as they do not conflict with one another.
The friction coupling and the switch machine according to the present invention will be described with reference to fig. 1 to 15.
The second friction plate 23 and the first friction plate 22 in the friction coupling are in dry friction, when the external load of the switch machine suddenly increases to exceed the friction conversion force, adhesion often occurs between the second friction plate 23 and the first friction plate 22, relative rotation friction cannot be realized, the output shaft 8 is locked and blocked due to no friction motion of the friction coupling, and the motor is burnt out seriously; or the friction value is very large at the moment of relative motion between the second friction plate 23 and the first friction plate 22 from static state to dynamic state, so that a large surge starting current is formed, and the influence on a circuit system is caused, therefore, a friction coupler is required to be designed, the motor can be protected, and meanwhile, the unstable moment can be changed into the stable moment.
As shown in fig. 1 to 6, the friction coupling in the present invention comprises an input gear 1 and a first elastic component 3, wherein a moment component 2 is rotationally arranged in the input gear 1, a first friction plate 22 and a second friction plate 23 are arranged in the moment component 2, the first friction plate 22 is fixedly arranged in the moment component 2, the second friction plate 23 is connected with an output shaft 8, the first elastic component 3 enables the second friction plate 23 to abut against the first friction plate 22, when the feedback torque of the output shaft 8 is greater than the set torque, the moment component 2 and the input gear 1 relatively rotate, the force of the first elastic component 3 abutting against the second friction plate 23 is reduced, and the 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.
The torque is input to the output shaft 8 through the input gear 1, the first elastic component 3 is abutted against the plane part 241, the input gear 1 and the torque component 2 synchronously rotate, 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 torque fed back by the output shaft 8 is larger than the set torque, the torque fed back by the output shaft 8 is reduced, damage is not caused to the motor, the second elastic component 6 is provided with a torque component 2 to rotate in the input gear 1 by an angle, the first elastic component 3 is abutted against the concave part 242 by the plane part 241, the abutting force between the first elastic component 3 and 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 torque received by the input gear 1 is reduced, the effect of protecting the motor is achieved, the service life of the motor is prolonged, the structure is simple, the torque fed back by the output shaft 8 is ensured to be stable, damage to the motor is avoided, and meanwhile the safety of turnout opening and closing is improved.
Further, as shown in fig. 1 to 8, the moment assembly 2 further includes a moment frame 21, the moment 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 moment frame 21, the input gear 1 is provided with first grooves 11 along a circumferential direction, the moment frame 21 is provided with first protrusions 211 along the circumferential direction, the width of the first protrusions 211 is smaller than the width of the first grooves 11, so that the moment frame 21 can rotate in the input gear 1 by a certain angle, a plurality of first grooves 11 are uniformly distributed in the circumferential direction of the input gear 1, a plurality of first protrusions 211 are uniformly distributed in the circumferential direction of the moment frame 21, each first protrusion 211 corresponds to one first groove 11, in this embodiment, the first protrusions 211 and the first grooves 11 are respectively provided with four, and other numbers can be designed according to practical situations. The width of the first protrusion 211 is designed to be smaller than the width of the first groove 11, so that the moment frame 21 can rotate 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 moment frame 21 can only rotate a certain angle in the input gear 1 but can not rotate all the time through the limitation of the first groove 11 to the first protrusion 211, when the fed back moment is small, the input gear 1 can rotate together with the moment component 2, in the embodiment, the rotatable angle of the moment frame 21 in the first groove 11 is within 6 degrees, and in other embodiments, the rotatable angle of the moment frame 21 in the first groove 11 can be set according to the actual requirement.
Further, as shown in fig. 6 to 10, the first friction plate 22 is fixedly disposed in the moment frame 21, specifically, the first friction plate 22 is provided with second protrusions 221, the second protrusions 221 are matched with the first protrusions 211 of the moment frame 21, the first friction plate 22 can be limited in the moment frame 21, one end of the moment 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 moment 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 disposed, and four first protrusions 211 are disposed. In this embodiment, one surface of the second friction plate 23 contacts with the first friction plate 22, the other surface contacts with the second elastic component 6, the second friction plate 23 is tightly contacted with the first friction plate 22 by the elastic action of the second elastic component 6, so that friction force can be generated between the second friction plate 23 and the first friction plate 22, force is transmitted from the input gear 1 to the moment frame 21, force is transmitted to the first friction plate 22 by the moment frame 21, and force is transmitted to the output shaft 8 by the second friction plate 23 through friction force action with the first friction plate 22. In this embodiment, in order to fully utilize 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 212, two first friction plates 22 and three second friction plates 23 are disposed, and one first friction plate 22 is disposed between each two second friction plates 23, so that when the input gear 1 transmits the force to the first friction plate 22, both sides of the first friction plate 22 are contacted with the second friction plates 23, and the friction is fully utilized, and the specific distribution sequence is that the baffle 212, the second friction plates 23, the first friction plates 22 and the second friction plates 23. In other embodiments, a plurality of first friction plates 22 and a plurality of second friction plates 23 may be provided as needed, as long as the first friction plates 22 and the second friction plates 23 are alternately provided.
Further, as shown in fig. 6 to 12, the moment assembly 2 is provided with a plane portion 241 and a recess portion 242, the first elastic assembly 3 abuts against the plane portion 241, when the moment fed back by the output shaft 8 is greater than a set value, the moment assembly 2 rotates in the input gear 1 by an angle, so that the first elastic assembly 3 abuts against the recess 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, and the fed back force is reduced, thereby achieving the effect of protecting the motor.
Further, as shown in fig. 6 to 12, the moment 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 moment 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 portion 241 and the concave portion 242 are disposed on one surface of the connecting plate 24, which is close to the first elastic assembly 3, and the planar portion 241 and the concave portion 242 are alternately arranged along the circumferential direction of the connecting plate 24. When the feedback torque is greater than the set value, the torque assembly 2 rotates in the input gear 1 by an angle, so that the first elastic assembly 3 is abutted to the concave portion 242 from the plane portion 241, the force of the first elastic assembly 3 abutted to 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 shape of the connecting plate 24 is the same as that of the first friction plate 22, the connecting plate 24 is provided with a fourth protrusion 243, and the fourth protrusion 243 is matched with the inside of the first protrusion 211 of the moment frame 21, so that the connecting plate 24 can be limited in the moment frame 21, but the connecting plate 24 can move along the axial direction of the moment frame 21, so that when the first elastic component 3 abuts against the connecting plate 24, the connecting plate 24 can be pushed to move along the axial direction of the moment frame 21 by adjusting the elastic force of the first elastic component 3, and then the contact force between the second friction plate 23 and the first friction plate 22 can be changed, and further the friction force between the first friction plate 22 and the second friction plate 23 can be changed, so as to achieve the effect of adjusting the feedback of the output shaft 8. Avoiding damage to the motor and improving the safety of switch opening and closing.
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 in 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 component 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 to abut 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 components 3 are disposed in each through hole 41, and under the combined action of the twelve first elastic components 3, the stress on the connecting plate 24 contacted with the first elastic components 3 is uniform, so that the stress between the connecting plate 24 and the second friction plate 23 is uniform.
Further, as shown in fig. 4 and 15, the first elastic component 3 further includes a ball 33, where the ball 33 is disposed between the first elastic member 32 and the connecting plate 24, when the torque fed back is smaller than the set torque, the ball 33 abuts against the planar portion 241, the first elastic member 32 is not deformed, when the torque fed back is greater than the set torque, the ball 33 abuts against the concave portion 242, the first elastic member 32 is deformed, so as to reduce the abutting force to the second friction plate 23, and since the ball 33 is spherical, the ball 33 is disposed so that the ball 33 can conveniently move between the planar portion 241 and the concave portion 242, reducing friction resistance, and improving 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 an end of the first elastic member 32 away from the connecting plate 24, for adjusting the elastic force of the first elastic member 32, when the elastic force of the first elastic member 32 to the connecting plate 24 needs to be increased, only the adjusting cover 5 needs to be rotated into the fixing frame 4 in a direction close to the first elastic member 32, when the elastic force of the first elastic member 32 to the connecting plate 24 needs to be reduced, only the adjusting cover 5 needs to be rotated in a direction away from the first elastic member 32, and the operation is simple and convenient.
As shown in fig. 12, the friction coupling of the present invention further includes a second elastic component 6 and an end cover 7, wherein the second elastic component 6 is connected with the torque frame 21, and when the feedback torque is greater than the set value, the second elastic component 6 carries the torque frame 21 to rotate by an angle in the input gear 1, so that the first elastic member 32 is abutted to the recess 242 by the plane 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 passes 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 synchronously rotate, and force can be output to the output shaft 8 through the second friction plate 23. Bearings are arranged at two ends of the output shaft 8 and are rotatably arranged on the end cover 7 and the fixing frame 4 through the bearings, and oil seals are also arranged at two ends of the output shaft 8 and are used 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 moment 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 formed between the first arc-shaped groove 71 and the second arc-shaped groove 2121 in a surrounding mode, a second elastic component 6 is arranged in the arc-shaped cavity, and the second elastic component 6 is used for adjusting the rotation angle of the moment frame 21 in the input gear 1.
Further, as shown in fig. 12, the second elastic member 6 includes two abutment members 61 and a second elastic member 62, the two abutment members 61 are disposed at both ends of the arc-shaped cavity, respectively, the second elastic member 62 is disposed between the two abutment members 61, and the second elastic member 62 is used to abut the two abutment members 61 at both ends of the arc-shaped cavity. At the same time, the end cover 7 and the moment frame 21 can move synchronously due to the elastic action of the second elastic piece 62 abutting against the two abutting pieces 61. In this embodiment, the abutment 61 may be two spheres.
In another embodiment, as shown in fig. 13, the two abutting pieces 61 may be blocks, the middle of each 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 block, meanwhile, 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 block is extruded by sliding the shifting block 74 in the slide way 72, so that the length of the second elastic piece 62 can be changed and the elastic deformation can be generated. Simultaneously, the end cover 7 and the baffle 212 are connected by the shifting block 74, the shifting block 74 can squeeze the second elastic piece 62 to elastically deform, and simultaneously, the shifting block 74 can synchronously rotate the end cover 7 and the baffle 212. In other embodiments, the abutment member 61 may be designed in other shapes, as long as the abutment with the second elastic member 62 is satisfied, and the effect of synchronously moving the end cap 7 and the torque frame 21 is ensured.
The invention also provides a switch machine comprising a friction coupling as described above.
The working principle of the friction coupling in the invention is as follows:
normally, the two abutting pieces 61 abut against two ends of the arc-shaped cavity, because a part of the two abutting pieces 61 is located in the second arc-shaped groove 2121 of the baffle 212, the moment frame 21 and the end cover 7 can be made to rotate synchronously, meanwhile, because the two abutting pieces 61 abut against two ends of the arc-shaped cavity, the moment frame 21 can be made to rotate in the input gear 1 in a non-angle mode, the moment frame 21 and the input gear 1 synchronously rotate, the balls 33 abut against the plane portion 241, namely the first elastic piece 32 abuts against the plane portion 241, friction force is generated between the second friction piece 23 and the first friction piece 22, the force is transmitted from the input gear 1 to the first friction piece 22, the first friction piece 22 is transmitted into the second friction piece 23 through the friction force, and the second friction piece 23 is transmitted to the output shaft 8.
When the torque fed back by the output shaft 8 is greater than the set torque, one of the two abutting pieces 61 presses the other abutting piece 61, meanwhile, due to stress, the abutting piece 61 presses one end of the arc-shaped cavity, the torque frame 21 can generate angular deflection in the input gear 1, after the angular deflection of the torque frame 21, the connecting plate 24 in the torque frame 21 can generate angular deflection, as the first elastic component 3 is originally abutted against the plane part 241 of the connecting plate 24, after the connecting plate 24 rotates, the first elastic component 3 is abutted against the concave part 242 of the connecting plate 24, so that the first elastic piece 32 deforms and stretches, the elastic force of the first elastic piece 32 is reduced, the abutting force to the second friction piece 23 is reduced, and then the friction force between the second friction piece 23 and the first friction piece 22 is reduced, so that the fed back force is reduced, and the torque fed back to the motor is set no matter whether the torque fed back by the output shaft 8 is smaller than the set torque or greater than the set torque, through the adjustment of the first elastic component 3 and the second elastic component 6, the motor can be closed within a smaller range, the service life of the motor is prolonged, and the safety of the switch is prolonged.
It will be understood that the invention has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments 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 (13)
1. The utility model provides a friction coupling, a serial communication port, including input gear and first elastic component, the rotation is provided with moment subassembly in the input gear, be provided with first friction disc and second friction disc in the moment subassembly, first friction disc is fixed to be set up in moment subassembly, moment subassembly includes moment frame and connecting plate, moment frame one end is provided with the baffle, connecting plate one side and second friction disc butt, another side and first elastic component butt, first friction disc and baffle butt, moment frame rotation sets up in the input gear, first friction disc, second friction disc and connecting plate are all arranged in the moment frame, the second friction disc is arranged in between first friction disc and the connecting plate, the output shaft is connected to the second friction disc, first elastic component makes second friction disc butt at first friction disc, when the feedback moment of output shaft is greater than the settlement moment, moment subassembly and input gear relative rotation, the power of first elastic component butt at the second friction disc reduces, friction force between first friction disc and the second friction disc reduces, so that the moment of feedback reduces.
2. The friction coupling according to claim 1, wherein the torque assembly is provided with a planar portion and a recessed portion, the first elastic assembly abuts against the planar portion, and when the feedback torque is greater than the set value, the torque assembly rotates relative to the input gear, the first elastic assembly abuts against the recessed portion from the planar portion, so that the force of the first elastic assembly abutting against the second friction plate is reduced.
3. The friction coupling according to claim 2, wherein the planar portion and the recessed portion are disposed on a side of the web adjacent the first resilient member.
4. A friction coupling according to claim 3, wherein the flat portions and the recessed portions are alternately arranged in the circumferential direction of the connecting plate.
5. The friction coupling according to claim 1, wherein the input gear is provided with a first groove in a circumferential direction, the torque bracket 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 bracket rotates by an angle in the input gear.
6. The friction coupling according to claim 1, further comprising a second elastic member connected to the torque frame, the second elastic member carrying the torque frame to rotate an angle within the input gear when the feedback torque is greater than the set value such that the first elastic member abuts the recess from the planar portion.
7. The friction coupling according to claim 6, further comprising an end cap, wherein the end cap is connected to the input gear, a first arc-shaped slot is formed in the end cap, a second arc-shaped slot is formed in the torque bracket, the first arc-shaped slot and the second arc-shaped slot are arranged in a one-to-one correspondence, an arc-shaped cavity is defined between the first arc-shaped slot and the second arc-shaped slot, a 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 bracket in the input gear.
8. The friction coupling according to claim 7, wherein the second elastic member comprises two abutment members disposed at both ends of the arc-shaped cavity, respectively, and a second elastic member disposed between the two abutment members for abutting the two abutment members at both ends of the arc-shaped cavity.
9. The friction coupling according to claim 1, further comprising a holder, the holder being coupled to the input gear, the holder having a through hole formed therein, the first elastic member being abutted to the connection plate through the through hole.
10. The friction coupling according to claim 9, wherein the first resilient assembly comprises a guide cylinder disposed within the through-hole and a first resilient member passing through the guide cylinder to abut the web.
11. The friction coupling according to claim 10, wherein the first resilient assembly further comprises balls disposed between the first resilient member and the connection plate, the balls being abutted against the recess by the flat portion when the torque being fed back is greater than the set torque, such that the force of the first resilient member abutting against the second friction plate is reduced.
12. The friction coupling according to claim 10, further comprising an adjustment cap disposed on the fixing frame, the adjustment cap abutting against an end of the first elastic member remote from the connection plate for adjusting an elastic force of the first elastic member.
13. A switch machine comprising a friction coupling as claimed in any one of claims 1 to 12.
Priority Applications (1)
| 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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| 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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| CN115030966A CN115030966A (en) | 2022-09-09 |
| CN115030966B true CN115030966B (en) | 2023-08-01 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3703444B2 (en) * | 2002-06-06 | 2005-10-05 | 川崎重工業株式会社 | Friction clutch for vehicle |
| US8105171B2 (en) * | 2006-08-11 | 2012-01-31 | 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 |
| CN110520644B (en) * | 2017-04-18 | 2021-01-15 | 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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