CN111361538B - Outer clamp body, maglev train brake and brake control method - Google Patents
Outer clamp body, maglev train brake and brake control method Download PDFInfo
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- CN111361538B CN111361538B CN202010279463.1A CN202010279463A CN111361538B CN 111361538 B CN111361538 B CN 111361538B CN 202010279463 A CN202010279463 A CN 202010279463A CN 111361538 B CN111361538 B CN 111361538B
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- transmission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/741—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on an ultimate actuator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides an external clamp body, comprising: the outer clamp body is provided with a through hole; a motor assembly having an output shaft; a first transmission assembly, the first transmission assembly comprising: the transmission nut penetrates through the through hole, the transmission nut is in relative rotation connection with the through hole, and the transmission nut is connected with the output shaft; the transmission screw penetrates through the transmission nut, the transmission screw is in transmission connection with the transmission nut, and the transmission screw is in relative movement connection with the outer clamp body. The outer clamp body provided by the invention is applied to the brake for the maglev train, the motor is used as the driving force, an external medium is not needed, the response speed of the brake for the maglev train is improved, and the running safety of the maglev train is ensured. The invention also provides a magnetic-levitation train brake and a brake control method.
Description
Technical Field
The invention belongs to the field of brakes for maglev trains, and particularly relates to an outer clamp body, a maglev train brake and a brake control method.
Background
The braking system of the maglev train mainly adopts a hydraulic brake at present. The working process of the hydraulic brake is as follows: the brake control unit calculates a required braking force according to the received braking force demand, and sends a hydraulic control signal to the hydraulic control unit, and the hydraulic control unit supplies oil to the hydraulic brake according to the hydraulic control signal, so that the braking force is applied.
However, the hydraulic brake applied to the existing maglev train needs to output the braking force by using an external medium, namely oil hydraulic pressure, so that the response time of the brake is increased, and the potential safety hazard of the maglev train during braking is further increased.
Disclosure of Invention
The invention provides an external clamp body, aiming at the technical problem of long response time of a hydraulic brake applied to a magnetic-levitation train at present, the external clamp body is applied to the brake for the magnetic-levitation train, a motor is used as a driving force, an external medium is not needed, the response speed of the brake for the magnetic-levitation train is improved, and the running safety of the magnetic-levitation train is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
an outer caliper body applied to a brake of a magnetic suspension train comprises:
the outer clamp body is provided with a through hole;
a motor assembly having an output shaft;
a first transmission assembly, the first transmission assembly comprising:
the transmission nut penetrates through the through hole, the transmission nut is in relative rotation connection with the through hole, and the transmission nut is connected with the output shaft;
the transmission screw penetrates through the transmission nut, the transmission screw is in transmission connection with the transmission nut, and the transmission screw is in relative movement connection with the outer clamp body.
Further, still include the second transmission subassembly, the second transmission subassembly includes:
the transmission shaft is in relative rotating connection with the outer plier body and is connected with the output shaft;
the first driving wheel is coaxially connected with the transmission shaft;
the second driving wheel is coaxially connected with the driving nut;
and the transmission belt is in transmission connection with the first transmission wheel and the second transmission wheel respectively.
Further, still include the adjustment assembly, the adjustment assembly includes:
the mounting piece is connected with the outer clamp body;
the connecting piece is connected with the mounting piece through an adjusting bolt and an adjusting nut;
the adjusting shaft is connected with the connecting piece;
the adjusting wheel is sleeved on the outer side of the adjusting shaft, the adjusting wheel is connected with the adjusting shaft in a coaxial rotating mode, and the adjusting wheel is abutted to the outer side face of the transmission belt.
Further, still include the reset assembly, the reset assembly includes:
the moving piece is connected with the outer caliper body in a relatively moving mode, penetrates through the outer caliper body, and a limiting part is arranged at one end, far away from the rail or the brake disc, of the moving piece;
the elastic piece is sleeved on the outer side of the moving piece, and two ends of the elastic piece are respectively abutted to the outer caliper body and the limiting part.
Further, still include:
the shell assembly is connected with the outer clamp body and provided with a guide part, and the guide part is connected with the transmission screw rod in a relatively moving manner.
The invention also provides a magnetic suspension train brake, which comprises any one of the outer clamp bodies, and is characterized by further comprising:
the inner clamp body is arranged opposite to the outer clamp body;
the inner clamp body and the outer clamp body are respectively connected with the supporting device in a relatively moving way;
the first brake clamp is connected with the inner clamp body;
and the second brake clamp is arranged corresponding to the outer clamp body.
Further, the first brake caliper includes:
the clamp body is connected with the inner clamp body;
the friction assembly is connected with the clamp body and is arranged opposite to the rail or the brake disc;
a load sensor connected between the caliper body and the friction assembly.
Further, the first brake caliper further comprises:
a rubber spring connected between the load sensor and the friction assembly.
The invention also provides a brake control method, which uses the magnetic-levitation train brake, and comprises the following steps:
(1) the controller receives the braking request and calculates the required target braking force;
(2) the controller controls the motor assembly to rotate, the output shaft drives the transmission nut to rotate, the transmission screw rod is further driven to move, and the transmission screw rod pushes the second brake clamp to press the rail or the brake disc;
(3) acquiring the load of a second brake clamp, and feeding the load back to the controller;
(4) the controller compares the load with the target braking force, and adjusts the rotating speed and the rotating direction of the motor assembly in real time according to the comparison result.
Further, step (1) is preceded by step (0):
(0) the controller controls the motor assembly to rotate, the output shaft drives the transmission nut to rotate, the transmission lead screw is further driven to move, and the transmission lead screw pushes the second brake clamp to press the track or the brake disc tightly, so that the braking force reaches a set threshold value F0; the controller controls the motor assembly to rotate reversely for a certain number of turns, so that the distance between the transmission screw rod and the track or the brake disc reaches a specified value.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the outer clamp body provided by the invention, the first transmission assembly is connected with the outer clamp body, the outer clamp body is provided with the through hole, the first transmission assembly comprises the transmission nut and the transmission lead screw, the transmission nut is in relative rotation connection with the through hole, the transmission lead screw penetrates through the transmission nut, the transmission lead screw is in mutual transmission connection with the transmission nut, and the transmission lead screw is in relative movement connection with the outer clamp body. According to the outer caliper body provided by the invention, when the motor assembly is electrified to act, the output shaft rotates, so that the transmission nut is driven to rotate relative to the outer caliper body, the outer caliper body limits the rotation of the transmission lead screw, and the transmission lead screw moves relative to the outer caliper body, namely, the transmission lead screw axially moves under the control of the motor assembly and performs braking operation when moving towards the direction of a track or a brake disc; and when the brake disc moves away from the rail or the brake disc, the relieving operation is performed. The outer clamp body provided by the invention is applied to a magnetic-levitation train brake, the motor assembly is used as a driving force, an external medium is not needed, the response speed of the brake for the magnetic-levitation train is improved, and the running safety of the magnetic-levitation train is ensured.
2. According to the brake for the maglev train, the load sensor is positioned between the clamp body of the first brake clamp and the friction assembly, and the load sensor is directly connected into the compaction structure of the brake in series, so that the load sensor can monitor the output force of the brake of the maglev train in real time, and the accurate control of the output braking force is further realized.
3. According to the braking control method provided by the invention, a controller receives a braking request, calculates a required target braking force, controls a motor component to rotate according to the required target braking force, and an output shaft of the motor component drives a transmission nut to rotate so as to drive a transmission screw to move, so that a first braking clamp and a second braking clamp a track or a brake disc to brake; and further acquiring the load of the second brake clamp, comparing the load with a target brake force by the controller, and adjusting the rotating speed and the rotating direction of the motor assembly in real time according to the comparison result. The brake control method provided by the invention can feed back the brake force to the controller in real time, and carry out quick response according to the comparison result of the real-time brake force and the target brake force, so that the brake force is more accurate.
4. The brake control method further comprises a pre-pressing step. Specifically, before the braking force is applied, the controller controls the motor assembly to rotate, the output shaft drives the transmission nut to rotate, the transmission screw rod is further driven to move, and the transmission screw rod pushes the second brake clamp to press the track or the brake disc, so that the braking force reaches a set threshold value F0; the controller controls the motor assembly to rotate reversely for a certain number of turns, so that the distance between the transmission screw rod and the track or the brake disc reaches a specified value. The calibration of the brake clearance is realized, so that the response time of the brake of the maglev train provided by the invention is constant.
Drawings
Fig. 1 is a schematic front view of an outer clamp body according to the present embodiment;
FIG. 2 is a right side view of the outer caliper body shown in FIG. 1;
FIG. 3 is a schematic sectional view taken along line A-A in FIG. 1;
FIG. 4 is a schematic sectional view taken along line B-B in FIG. 1;
FIG. 5 is a schematic structural view of the housing assembly;
FIG. 6 is a schematic structural view of a motor assembly;
FIG. 7 is a schematic structural view of the adjustment assembly of FIG. 1;
FIG. 8 is a schematic structural view of the reset assembly of FIG. 1;
fig. 9 is a schematic structural diagram of a brake of a magnetic levitation train provided in this embodiment;
FIG. 10 is a schematic illustration of the first brake caliper of FIG. 9;
fig. 11 is a schematic diagram of a braking process of the magnetic levitation train brake provided in the present embodiment;
fig. 12 is a flowchart of a braking control method provided in this embodiment.
The reference numerals are explained in detail:
1. an outer caliper body; 11. an outer caliper body; 111. a through hole; 12. a motor assembly; 121. a motor; 1211. an output shaft; 122. a speed reduction mechanism; 123. a coupling; 124. a dust-proof member; 13. a first transmission assembly; 131. a drive nut; 132. a drive screw; 1321. a guide fitting portion; 133. a fixing member; 14. a second transmission assembly; 141. a drive shaft; 142. a first drive pulley; 143. a second transmission wheel; 144. a transmission belt; 15. an adjustment assembly; 151. a mounting member; 152. an adjustment shaft; 153. an adjustment wheel; 154. a connecting member; 155. adjusting the bolt; 156. adjusting the nut; 16. a reset assembly; 161. an elastic member; 162. a moving member; 1621. a limiting part; 17. a housing assembly; 171. a guide member;
2. an inner caliper body;
3. a first brake caliper; 31. a clamp body; 32. a friction assembly; 33. a load sensor; 34. a rubber spring;
4. a second brake caliper;
5. a support device;
6. a rail or a brake disc.
Detailed Description
The technical solutions in the embodiments of the present invention will be fully described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only some specific embodiments, not all embodiments, of the general technical solution of the present invention. All other embodiments, which can be derived by a person skilled in the art from the general idea of the invention, fall within the scope of protection of the invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides an external clamp body, aiming at the technical problem of long response time of a hydraulic brake applied to a magnetic-levitation train at present, the external clamp body is applied to the brake for the magnetic-levitation train, a motor is used as a driving force, an external medium is not needed, the response speed of the brake for the magnetic-levitation train is improved, and the running safety of the magnetic-levitation train is ensured. The technical schemes of the outer clamp body, the maglev train brake and the brake control method provided by the invention are specifically explained below by combining specific embodiments.
The embodiment provides an outer caliper body 1, is applied to maglev train stopper, includes:
the external forceps body 11, the external forceps body 11 is provided with a through hole 111;
a motor assembly 12, the motor assembly 12 having an output shaft 1211;
the transmission nut 131 penetrates through the through hole 111, the transmission nut 131 is connected with the through hole 111 in a relatively rotating mode, and the transmission nut 131 is connected with the output shaft 1211;
the transmission screw 132 penetrates through the transmission nut 131, the transmission screw 132 is in transmission connection with the transmission nut 131, and the transmission screw 132 is in relative movement connection with the outer clamp body 11.
According to the external clamp 1 provided by the embodiment, the first transmission component 13 is connected with the external clamp body 11, the through hole 111 is formed in the external clamp body 11, the first transmission component 13 comprises the transmission nut 131 and the transmission screw 132, the transmission nut 131 is connected with the through hole 111 in a relatively rotating mode, the transmission screw 132 penetrates through the transmission nut 131, the transmission screw 132 is connected with the transmission nut 131 in a mutually transmission mode, and the transmission screw 132 is connected with the external clamp body 11 in a relatively moving mode. In the external clamp 1 provided in this embodiment, when the motor assembly 12 is powered on, the output shaft 1211 rotates, so as to drive the transmission nut 131 to rotate relative to the external clamp body 11, the external clamp body 11 limits the rotation of the transmission screw 132, and the transmission screw 132 moves relative to the external clamp body 11, that is, the transmission screw 132 axially moves under the control of the motor assembly 12, and performs a braking operation when moving in the direction of the track or the brake disc 6; when moving away from the rail or brake disc 6, a release operation is performed. The outer caliper body 1 provided by the embodiment is applied to a magnetic-levitation train brake, the motor assembly 12 is used as driving force, no external medium is needed, the response speed of the brake for the magnetic-levitation train is improved, and the running safety of the magnetic-levitation train is ensured.
Specifically, the outer caliper 1 provided in the present embodiment includes an outer caliper body 11, a motor assembly 12, a first transmission assembly 13, a second transmission assembly 14, an adjustment assembly 15, a reset assembly 16, and a housing assembly 17. The motor component 12 is connected with a second transmission component 14, the second transmission component 14 is connected with a first transmission component 13, the adjusting component 15 acts on the second transmission component 14, and the resetting component 16 is connected with the outer clamp body 11.
More specifically, the outer caliper body 11 provides support and fixation, and the outer caliper body 11 is provided with a through hole 111 for connection with the first transmission assembly 13.
The motor assembly 12 provides braking and relieving driving force for the outer caliper body 1 provided by the embodiment. The motor assembly 12 includes a motor 121, a reduction mechanism 122, a coupling 123, and a dust-proof 124. The motor 121 is a driving member, and the motor 121 has an output shaft 1211. Since the motor 121 has a high rotation speed and needs to reduce the rotation speed and increase the torque when outputting externally, the motor assembly 12 of the present embodiment further includes a speed reducing mechanism 122, and the output shaft 1211 is connected to the speed reducing mechanism 122. The reduction mechanism 122 is connected to the first transmission assembly 13 through a coupling 123. In order to protect the motor assembly 12, the motor assembly 12 provided in this embodiment further includes a dust-proof member 124, and the dust-proof member 124 is sleeved on the outer side of the coupling 123 to play a role of dust prevention.
The first transmission assembly 13 is used for transmitting the driving force of the motor assembly 12. The first transmission assembly 13 includes a transmission nut 131, a transmission lead screw 132, and a fixing member 133. The transmission nut 131 penetrates through the through hole 111, the transmission nut 131 is connected with the through hole 111 in a relative rotation mode through a bearing, and the fixing piece 133 is connected to the through hole 111 and plays a role in axially fixing the transmission nut 131. The driving nut 131 is connected to the output shaft 1211, and specifically, the driving bolt 131 is connected to the output shaft 1211 of the motor assembly 12 through the second driving assembly 14. The transmission screw 132 penetrates through the transmission nut 131, the transmission screw 132 is in transmission connection with the transmission nut 131 through threads, and the transmission screw 132 is in relative movement connection with the outer clamp body 11. Specifically, the driving screw 132 is provided with a guide engagement portion 1321, and the guide engagement portion 1321 may have a square hole structure. The outer caliper body 1 provided by this embodiment is provided with the housing assembly 17, the housing assembly 17 is sleeved on the outer caliper body 11, the guide member 171 is provided in the housing assembly 17, and the guide member 171 is mutually matched with the guide matching portion 1321, so that the transmission screw 132 can move relative to the housing assembly 17, and thus move relative to the outer caliper body 11. Preferably, in order to improve the sealing performance of the outer caliper body 1 provided in the present embodiment, the housing assembly 17 may be a sealing cover structure.
In order to further improve the response speed of the outer caliper body 1 provided by the embodiment during braking or relieving operation and improve the structural compactness, a second transmission assembly 14 is further provided. Specifically, the second transmission assembly 14 includes a transmission shaft 141, a first transmission wheel 142, a second transmission wheel 143, and a transmission belt 144. The transmission shaft 141 is rotatably connected to the outer caliper body 11 via a bearing, and the transmission shaft 141 is connected to the output shaft 1211 via the coupling 123. The first driving wheel 142 is coaxially connected with the driving shaft 141, the second driving wheel 143 is coaxially connected with the driving nut 131, and the driving belt 144 is respectively and mutually in driving connection with the first driving wheel 142 and the second driving wheel 143. When the motor 121 is powered on, the output shaft 1211 drives the transmission shaft 141 to rotate through the coupling 123, so as to drive the first transmission wheel 142 to rotate, and the first transmission wheel 142 drives the second transmission wheel 143 to rotate through the transmission belt 144, further driving the transmission nut 131 to rotate. Since the drive screw 132 is restricted by the guide member 171, the drive screw 132 moves relative to the outer caliper body 11. Braking is performed when the drive screw 132 moves in the direction of the rail or the brake disk 6; when the motor 121 rotates in the reverse direction, the lead screw 132 moves away from the track or the brake disk 6, and the relief is performed. In the external clamp 1 provided by this embodiment, the motor 121 drives the first transmission assembly 13 to operate through the second transmission assembly 14, so as to increase the feeding speed, reduce the response time, and realize the rapid output of the braking force. Meanwhile, the transmission direction is changed through the second transmission assembly 14, so that the occupied space is reduced, and the structural compactness is improved.
In order to improve the accuracy of the transmission of the second transmission assembly 14, the outer caliper body 1 provided by the present embodiment further includes an adjusting assembly 15, and the adjusting assembly 15 includes a mounting member 151, a connecting member 154, an adjusting shaft 152, an adjusting wheel 153, an adjusting bolt 155 and an adjusting nut 156. The mounting part 151 is connected with the outer caliper body 11, the connecting piece 154 is connected with the mounting part 151 through an adjusting bolt 155 and an adjusting nut 156, the adjusting shaft 152 is connected with the connecting piece 154, the adjusting wheel 153 is sleeved outside the adjusting shaft 152, the adjusting wheel 153 is connected with the adjusting shaft 152 in a coaxial rotating mode, and the adjusting wheel 153 is abutted to the outer side face of the transmission belt 144. In actual use, the transmission belt 144 becomes loose, and further use affects transmission efficiency, and the braking force cannot be stably output. At this time, the distance between the adjusting wheel 153 and the mounting part 151 is adjusted by adjusting the screwing length of the adjusting bolt 155 and the adjusting nut 156, so that the tightness of the transmission belt 144 is adjusted, the transmission belt 144 has a certain pretightening force, and the transmission efficiency is ensured.
The outer caliper body 1 provided in this embodiment is further provided with a reset assembly 16. Reset assembly 16 provides an automatic retraction function for second brake caliper 4. Specifically, reset assembly 16 includes a moving member 162 and a resilient member 161. The moving member 162 is connected to the outer caliper body 11 in a relatively movable manner, the moving member 162 penetrates through the outer caliper body 11, a limiting portion 1621 is disposed at one end of the moving member 162 away from the rail or the brake disc 6, and one end of the moving member 162 facing the rail or the brake disc 6 is connected to the second brake caliper 4. The elastic element 161 is sleeved outside the moving element 162, and two ends of the elastic element 161 are respectively abutted against the outer caliper body 11 and the limiting part 1621. During braking, the transmission screw 132 moves towards the track or the brake disc 6, and the elastic piece 161 is compressed under the action of the limiting part 1621; after braking is completed, the transmission screw 132 is driven by the motor 121 to move in a direction away from the track or the brake disc 6, the transmission screw 132 is separated from the second braking clamp 4, the elastic member 161 applies restoring force to the limiting portion 1621, and the moving member 162 moves in a direction away from the track or the brake disc 6, so as to drive the second braking clamp 4 to move in a direction away from the track or the brake disc 6, thereby realizing an automatic retraction function of the second braking clamp 4.
The embodiment further provides a magnetic suspension train brake, which comprises the outer caliper body 1 provided by the embodiment, and further comprises an inner caliper body 2, a first brake clamp 3, a second brake clamp 4 and a supporting device 5. The inner caliper body 2 and the outer caliper body 1 are arranged oppositely, specifically, the inner caliper body 2 and the outer caliper body 1 are respectively arranged at two sides of the track or the brake disc 6 and are symmetrically arranged with each other, and the distances between the inner caliper body 2 and the outer caliper body 1 as well as the track or the brake disc 6 are both L1. The first brake clamp 3 is connected with the inner clamp body 2, and the second brake clamp 4 is arranged corresponding to the outer clamp body 1. The inner forceps body 2 and the outer forceps body 1 are respectively connected with the supporting device 5 in a relatively moving way.
During braking, the motor 121 drives the transmission nut 131 to rotate through the second transmission assembly 14, so that the transmission lead screw 132 moves L1 in the direction of the track or the brake disc 6, the transmission lead screw 132 pushes the second brake caliper 4 to press against the track or the brake disc 6, because the outer caliper 1 and the support device 5 move in the direction away from the track or the brake disc 6 under the action of the reaction force, the inner caliper 2 rapidly approaches the track or the brake disc 6, and the inner caliper 2 presses against the track or the brake disc 6, the transmission lead screw 132 moves forward by a distance of 2L1, and a braking force is generated. When the braking force is relieved, the motor 121 rotates reversely to drive the transmission screw 132 to move in the opposite direction, the braking force is not generated any more, the outer caliper body 1 and the inner caliper body 2 reset again under the action of the supporting device 5, and the clearance L1 is kept between the outer caliper body 1 and the inner caliper body 2 and the track or the brake disc 6.
To achieve real-time accurate control of the braking force, the first brake caliper 3 provided in this embodiment includes a caliper body 31, a friction member 32, and a load sensor 33. The caliper body 31 is connected to the inner caliper body 2, the friction member 32 is connected to the caliper body 31, the friction member 32 is disposed opposite to the rail or the brake disk 6, and the load sensor 33 is connected between the caliper body 31 and the friction member 32. The load sensor 33 is directly connected in series to the structure of the magnetic-levitation train brake provided by the embodiment, so that the load sensor 33 can monitor the output force of the magnetic-levitation train brake in real time, and further realize the accurate control of the output braking force. To further reduce the impact load of the first brake caliper 3, a rubber spring 34 is also provided. A rubber spring 34 is connected between the load cell 33 and the friction pack 32. The rubber spring 34 can enable the load sensor 33 to maintain normal operation under the action of impact force in the braking process, and the load measurement accuracy is improved.
In order to facilitate understanding of the technical solution of the present invention, the operation of the magnetic suspension train brake provided in this embodiment will be further described.
When braking, the motor 121 is powered on to rotate, the output shaft 1211 drives the transmission shaft 141 to rotate through the speed reducing mechanism 122 and the coupler 123, the transmission shaft 141 drives the first transmission wheel 142 to rotate, the first transmission wheel 142 drives the transmission belt 144 to move, and the transmission belt 144 drives the second transmission wheel 143 to rotate, so as to drive the transmission nut 131 to rotate; since the rotation of the lead screw 132 is limited, the lead screw 132 moves L1 in the direction of the rail or brake disk 6, thereby pushing the second brake caliper 4 to press against the rail or brake disk 6; since the outer caliper 1 and the support device 5 are moved away from the rail or the brake disk 6 by the reaction force, the inner caliper 2 is rapidly moved close to the rail or the brake disk 6, and the inner caliper 2 presses the rail or the brake disk 6, the drive screw 132 moves forward by a distance of 2L1, and the braking force is generated. At the same time, the moving member 162 moves toward the track or the brake disk 6, and the elastic member 161 is compressed by the stopper 1621.
When the speed is reduced, the motor 121 rotates reversely, the output shaft 1211 drives the transmission shaft 141 to rotate reversely through the speed reducing mechanism 122 and the coupling 123, the transmission shaft 141 drives the first transmission wheel 142 to rotate reversely, the first transmission wheel 142 drives the transmission belt 144 to move reversely, the transmission belt 144 drives the second transmission wheel 143 to rotate reversely, and the transmission nut 131 is further driven to rotate reversely; since the rotation of the drive screw 132 is limited, the drive screw 132 moves away from the rail or the brake disk 6, the braking force is released, and the inner caliper 2 and the outer caliper 1 are reset by the supporting device 5 and both maintain the distance of L1 with the rail or the brake disk 6. Meanwhile, the elastic element 161 applies a restoring force to the limiting portion 1621 to push the moving element 162 to move away from the rail or the brake disc 6, so as to drive the second brake caliper 4 to retract.
The invention also provides a brake control method, which uses the magnetic suspension train brake provided by the embodiment, and comprises the following steps:
(1) the controller receives the braking request and calculates the required target braking force;
(2) the controller controls the motor assembly 12 to rotate, the output shaft 1211 drives the transmission nut 131 to rotate, the transmission screw 132 is further driven to move, and the transmission screw 132 pushes the second brake clamp 4 to press the track or the brake disc 6;
(3) acquiring the load of the second brake clamp 4, and feeding the load back to the controller;
(4) the controller compares the load with a target braking force and adjusts the rotation speed and the rotation direction of the motor assembly 12 in real time according to the comparison result.
The brake control method provided by the embodiment can feed back the brake force to the controller in real time, and carry out quick response according to the comparison result of the real-time brake force and the target brake force, so that the brake force is more accurate.
Further, in order to calibrate the gap of the second brake caliper 4, the brake control method provided by the present embodiment further includes a pre-pressing step before step (1), that is, step (0): the controller controls the motor assembly 12 to rotate, the output shaft 1211 drives the transmission nut 131 to rotate, and further drives the transmission lead screw 132 to move, and the transmission lead screw 132 pushes the second brake caliper 4 to press the track or the brake disc 6, so that the braking force reaches the set threshold F0; the controller controls the motor assembly 12 to rotate in reverse for a certain number of turns so that the distance of the lead screw 132 from the track or brake disc 6 reaches a prescribed value. The calibration of the brake clearance is realized, so that the response time of the brake of the maglev train provided by the invention is constant.
Claims (6)
1. A maglev train brake, comprising:
an outer caliper body;
the inner clamp body is arranged opposite to the outer clamp body;
the inner clamp body and the outer clamp body are respectively connected with the supporting device in a relatively moving way;
the first brake clamp is connected with the inner clamp body;
the second brake clamp is arranged corresponding to the outer clamp body;
the outer jaw body includes:
the outer clamp body is provided with a through hole;
the motor assembly is provided with an output shaft and is connected between the outer clamp body and the inner clamp body;
a first transmission assembly, the first transmission assembly comprising:
the transmission nut penetrates through the through hole, the transmission nut is in relative rotation connection with the through hole, and the transmission nut is connected with the output shaft;
the transmission screw rod penetrates through the transmission nut, the transmission screw rod is in transmission connection with the transmission nut, and the transmission screw rod is in relative movement connection with the outer clamp body;
still include the second transmission subassembly, the second transmission subassembly includes:
the transmission shaft is in relative rotating connection with the outer plier body and is connected with the output shaft;
the first driving wheel is coaxially connected with the transmission shaft;
the second driving wheel is coaxially connected with the driving nut;
the transmission belt is in transmission connection with the first transmission wheel and the second transmission wheel respectively;
the first brake caliper includes:
the clamp body is connected with the inner clamp body;
the friction assembly is connected with the clamp body and is arranged opposite to the rail or the brake disc;
a load sensor connected between the caliper body and the friction assembly;
a rubber spring connected between the load sensor and the friction assembly.
2. A magnetic levitation train brake as recited in claim 1, wherein said outer caliper body further comprises an adjustment assembly, said adjustment assembly comprising:
the mounting piece is connected with the outer clamp body;
the connecting piece is connected with the mounting piece through an adjusting bolt and an adjusting nut;
the adjusting shaft is connected with the connecting piece;
the adjusting wheel is sleeved outside the adjusting shaft and is coaxially and rotatably connected with the adjusting shaft,
the adjusting wheel is mutually abutted with the outer side face of the transmission belt.
3. A magnetic levitation train brake as recited in claim 1, wherein said outer caliper body further comprises a reset assembly, said reset assembly comprising:
the moving piece is connected with the outer caliper body in a relatively moving mode, penetrates through the outer caliper body, and a limiting part is arranged at one end, far away from the rail or the brake disc, of the moving piece;
the elastic piece is sleeved on the outer side of the moving piece, and two ends of the elastic piece are respectively abutted to the outer caliper body and the limiting part.
4. A magnetic levitation train brake as recited in claim 1, wherein said outer caliper body further comprises:
the shell assembly is connected with the outer clamp body and provided with a guide part, and the guide part is connected with the transmission screw rod in a relatively moving manner.
5. A brake control method using the magnetic suspension train brake of any one of claims 1 to 4,
the method comprises the following steps:
(1) the controller receives the braking request and calculates the required target braking force;
(2) the controller controls the motor assembly to rotate, the output shaft drives the transmission nut to rotate, the transmission screw rod is further driven to move, and the transmission screw rod pushes the second brake clamp to press the rail or the brake disc;
(3) acquiring the load of a second brake clamp, and feeding the load back to the controller;
(4) the controller compares the load with the target braking force, and adjusts the rotating speed and the rotating direction of the motor assembly in real time according to the comparison result.
6. The brake control method according to claim 5, characterized by further comprising, before the step (1), a step (0):
(0) the controller controls the motor assembly to rotate, the output shaft drives the transmission nut to rotate, the transmission lead screw is further driven to move, and the transmission lead screw pushes the second brake clamp to press the track or the brake disc tightly, so that the braking force reaches a set threshold value F0; the controller controls the motor assembly to rotate reversely for a certain number of turns, so that the distance between the transmission screw rod and the track or the brake disc reaches a specified value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010279463.1A CN111361538B (en) | 2020-04-10 | 2020-04-10 | Outer clamp body, maglev train brake and brake control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010279463.1A CN111361538B (en) | 2020-04-10 | 2020-04-10 | Outer clamp body, maglev train brake and brake control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111361538A CN111361538A (en) | 2020-07-03 |
| CN111361538B true CN111361538B (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010279463.1A Active CN111361538B (en) | 2020-04-10 | 2020-04-10 | Outer clamp body, maglev train brake and brake control method |
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| Country | Link |
|---|---|
| CN (1) | CN111361538B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301331A (en) * | 1998-05-18 | 2001-06-27 | Skf工程研究中心公司 | Screw actuator and brake calliper comprising such actuator |
| CN205131257U (en) * | 2015-07-24 | 2016-04-06 | 天津市广山津达机械有限责任公司 | Well low -speed maglev train's arresting gear |
| CN107830083A (en) * | 2017-10-24 | 2018-03-23 | 隆中控股集团股份有限公司 | A kind of dynamo-electric brake |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE524118C2 (en) * | 2001-05-30 | 2004-06-29 | Haldex Brake Prod Ab | Device in a vehicle brake arrangement |
| DE102006018952A1 (en) * | 2006-04-24 | 2007-10-25 | Robert Bosch Gmbh | Disc brake for vehicle, comprises brake disk and brake pad which is designed against brake disk to provide braking action and force sensor is arranged at side of brake pads |
| JP2018114766A (en) * | 2017-01-16 | 2018-07-26 | トヨタ自動車株式会社 | Electric brake device |
-
2020
- 2020-04-10 CN CN202010279463.1A patent/CN111361538B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301331A (en) * | 1998-05-18 | 2001-06-27 | Skf工程研究中心公司 | Screw actuator and brake calliper comprising such actuator |
| CN205131257U (en) * | 2015-07-24 | 2016-04-06 | 天津市广山津达机械有限责任公司 | Well low -speed maglev train's arresting gear |
| CN107830083A (en) * | 2017-10-24 | 2018-03-23 | 隆中控股集团股份有限公司 | A kind of dynamo-electric brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111361538A (en) | 2020-07-03 |
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