CN111409614A - Rail transit braking device - Google Patents
Rail transit braking device Download PDFInfo
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- CN111409614A CN111409614A CN202010289268.7A CN202010289268A CN111409614A CN 111409614 A CN111409614 A CN 111409614A CN 202010289268 A CN202010289268 A CN 202010289268A CN 111409614 A CN111409614 A CN 111409614A
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- Prior art keywords
- brake
- parking
- screw rod
- worm
- motor
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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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a rail transit braking device, which comprises a braking mechanism and a parking mechanism, wherein the braking mechanism comprises a braking mechanism body and a braking mechanism body; the brake mechanism includes: the brake device comprises a brake motor, a worm driven by the brake motor, a worm wheel orthogonally meshed with the worm, a brake screw rod driven by the worm wheel, and a brake nut which is spirally arranged on the brake screw rod and can linearly move along the axial direction of the brake screw rod and is used for outputting brake force to a brake shoe assembly; the parking mechanism includes: the parking brake device comprises a parking motor, a parking screw rod driven by the parking motor, and a brake block which is spirally arranged on the parking screw rod and can linearly move along the axial direction of the parking screw rod, wherein the brake block is used for clamping a worm in the radial direction, so that the worm is static, the braking torque is kept, and the parking brake of a train is realized. The parking mechanism part of the braking device is powered by an independent motor, and power is transmitted to a parking screw rod in a turning way through a bevel gear pair to drive a braking block to execute the brake holding parking operation.
Description
Technical Field
The invention relates to the technical field of braking and speed regulation of railway station lines to traffic, in particular to railway station line traffic braking, which is embodied as a rail traffic braking device.
Background
With the rapid development of society and economy, the requirement on the speed of the train is higher and higher nowadays, and meanwhile, the safety performance of the whole train is hidden in the process that the train runs at an over-high speed. For the brake: the braking torque cannot be controlled; the main reason is that the whole braking process is too rigid and difficult to control under the condition of emergency braking of a high-speed and high-inertia train. The prediction of the braking effect does not correspond to the actual braking effect, which may seriously shorten the life of the machine to be braked and the braking device, and even may cause damage to the strength, rigidity, etc. of the mechanism. On the other hand, the transmission chain of the braking device is too long, so that the inertia moment of the whole mechanism is large, certain additional inertia load is generated, and finally the uncertainty of the braking time and the expected formulation effect cannot be realized.
Therefore, in order to achieve an efficient braking effect, certain braking condition requirements must be met. Such as: the uniform variable speed braking, the controllable braking time, the controllable braking torque and the like are realized. This requires that the braking device has a certain applicability, can be adapted to different working conditions, and also puts higher demands on the controllability of the braking and the service life of the braking mechanism to ensure that a predetermined braking effect is achieved.
The electromechanical brake has the advantages of small structure and accurate output torque, is mostly applied to automobile vehicles, and is gradually used on rail vehicles in recent years. Through the search, the chinese patent application CN 110696797 a discloses a pressure generating device for a brake system of a vehicle, which drives a worm-worm gear to drive a lead screw to operate through a motor, and further pushes a piston to apply a braking force, thereby implementing a common braking function in electromechanical braking. If the scheme is directly applied to the railway vehicle brake device with the spring brake cylinder, the service brake of the railway vehicle can be realized, and the parking brake function is realized by the original spring brake cylinder. Although the direct application improves the braking precision, the whole braking device has a huge structure because the spring brake cylinder is reserved, and if the spring brake cylinder is cancelled and the brake pad is directly driven through the screw rod, the parking braking function cannot be realized.
Disclosure of Invention
The invention mainly aims to make up for the defects of the prior braking technology, so that a braking device with controllable braking torque is provided, and parking braking is realized.
In order to solve the problems, the invention provides a rail transit braking device, which comprises a braking mechanism and a parking mechanism;
the brake mechanism includes: the brake device comprises a brake motor, a worm driven by the brake motor, a worm wheel orthogonally meshed with the worm, a brake screw rod driven by the worm wheel, and a brake nut which is spirally arranged on the brake screw rod and can linearly move along the axial direction of the brake screw rod and is used for outputting brake force to a brake shoe assembly;
the parking mechanism includes: the parking brake device comprises a parking motor, a parking screw rod driven by the parking motor, and a brake block which is spirally arranged on the parking screw rod and can linearly move along the axial direction of the parking screw rod, wherein the brake block is used for clamping a worm in the radial direction, so that the worm is static, the braking torque is kept, and the parking brake of a train is realized.
In the braking mechanism, a torque motor transmits torque-controllable power to the braking mechanism through the turning of a transmission device. The evolution mechanism of a four-bar mechanism, namely a sine mechanism, is adopted, power driving is realized by a screw-nut pair in a linear mechanism, an actuator-brake shoe on a driving connecting rod realizes the change of the pose, and the actuator-brake shoe tightly holds a member to be braked, so that the high-speed braking of the train is realized.
In the parking mechanism, bidirectional screw rods with opposite rotation directions are adopted to drive respective brake blocks and clamp a transmission shaft, so that two states of train brake keeping and parking are realized.
As a preferred technical scheme of the invention, the manufacturing and installation precision of the transmission mechanism parts is proper, and the overall part layout is reasonable, so that the basic strength and the service life of the transmission mechanism parts are ensured. The torque motor realizes direction change through a pair of bevel gear pairs and transmits power to the power spindle. The power main shaft transmits power to the braking mechanism through the worm gear pair.
As the preferable technical scheme of the invention, the installation and processing precision of the four-bar mechanism of the brake mechanism part and the four-bar mechanism must be controlled within a reasonable range so as to ensure the reasonable pose of the connecting rod. Meanwhile, the two linear pairs are required to be tightly matched, and a high-precision machine tool is adopted for machining when necessary. The nut pair provides power input by the rotation of the screw rod, and the sliding block pair kinematic pair is realized through the dovetail groove, so that the power is transmitted to the connecting rod. The brake shoe is fixed on the connecting rod, and the connecting rod drives the brake shoe to realize the pose adjustment and execute two processes of high-speed braking and speed reduction.
As a preferable technical scheme of the invention, the parking mechanism part requires proper braking force to ensure the braking effect. Meanwhile, the horizontal precision of the axis of the brake block is ensured, so that the hole of the brake block is tightly matched with the shaft, more point and surface contacts are ensured, the effect of tight matching is achieved, the braking effect is guaranteed, the excessive abrasion of the matching surface is reduced, and the service life is prolonged. The independent motor adjusts power transmission through a pair of bevel gears, realizes horizontal transmission of torque, drives the lead screw, realizes linear motion of the brake block, and accordingly executes parking braking.
Compared with the prior art, the invention has the following beneficial effects:
the controllability of the braking process of the machine is realized by designing the torque motor. The parking mechanism part is arranged inside the parking device, so that reliable parking can be guaranteed and maintained, and the combination of high-speed braking and parking is realized. And the brake mechanism part realizes the position and attitude adjustment of the brake actuator and the brake shoe by utilizing a connecting rod curve of the four-bar mechanism. The self-locking of the mechanism can be realized by adopting the driving of the screw rod, and the stability of the braking force is ensured. The braking process of the braking device is mainly as follows: the deceleration or braking of the rail transit is realized through the braking mechanism until the train stops, and the holding of the braking torque is realized by the parking mechanism part so as to maintain the stop state of the train.
Drawings
The technical solution of the present invention is further explained with reference to the accompanying drawings and the detailed description.
Fig. 1 is an external view of a brake device according to the present invention.
Fig. 2 is an exploded view of the braking mechanism.
Fig. 3 is an exploded view of the parking mechanism.
In the figure: 1-a machine shell; 2-end cap; 3-a brake shoe assembly; 4-braking the motor; 5-motor shaft; 6-a first bevel gear; 7-a second bevel gear; 8-a worm; 9-a worm gear; 10-a first rolling bearing; 11-a first rolling bearing seat; 12-brake screw rod; 13-a brake nut; 14-a second rolling bearing; 15-a thrust bearing; 16-a second bearing block; 17-a support ring; 18-parking motor base; 19-a slide block; 20-a transition joint; 21-a first bolt; 22-a first hex nut; 23-a second bolt; 24-a second hex nut; 25-a third bolt; 26-a third hex nut; 27-a parking motor; 28-a third bevel gear; 29-a fourth bevel gear; 30-a first brake pad; 31-a second brake pad; 32-a brake rail; 33-parking screw rod; 34-a third rolling bearing; 35-a third bearing seat; 36-a fourth bolt; 37-fourth hex nut; 43-brake motor base.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described below with reference to the accompanying drawings and implementation methods. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The braking device of the embodiment is shown in fig. 1, 2 and 3. The parking brake mechanism comprises a brake mechanism and a parking mechanism.
The brake mechanism part comprises a shell 1, an end cover 2, a brake shoe component 3, a brake motor 4, a brake motor base 43, a motor shaft 5, a first bevel gear 6, a second bevel gear 7, a worm 8, a worm wheel 9, a brake screw rod 12, a nut 13, a slide block 19, a conversion joint 20 and the like. The brake motor 4 is fixed to the housing 1 by the brake motor base 43, the first bolt 21, and the first hexagon nut 22. The motor shaft 5 of the brake motor 4 realizes output reversing through the first bevel gear 6 and the second bevel gear 7, and the second bevel gear 7 is fixed with the worm 8, so that the brake motor 4 drives the worm 8 to rotate. The worm 8 is supported in the housing 1 by a first rolling bearing 10 and a first rolling bearing seat 11. The first rolling bearing housing 11 is fixed in the housing 1 by a second bolt 23 and a second hexagon nut 24. The worm 8 is meshed with the worm wheel 9 to form a right-angled gear pair. The worm wheel 9 is fixed with the brake screw rod 12 through a key so as to transmit braking torque. In this example, the brake screw 12 is provided with a support ring 17 located in front of the worm wheel 9. For simplicity, the support ring 17 can be omitted and the worm wheel 9 can be fastened directly to the brake screw 12 or can be formed in one piece. The rear end of the brake screw 12 is supported to the housing 1 through a second rolling bearing 14, a thrust bearing 15, and a second bearing block 16. As shown, the second bearing housing 16 is fixed to the casing 1 by a third bolt 25 and a third hexagon nut 26.
The suspender of the brake shoe component 3 is hung on the shell 1, the conversion joint 20 and the brake shoe component 3 are matched through a bolt shaft hole to form a revolute pair, the slide block 19 and the conversion joint 20 realize a linear motion pair through a dovetail groove, the slide block 19 is connected with the brake nut 13 through threads, and the brake nut 13 is arranged on the brake screw rod 12 in a rotating mode to form a linear motion pair. The conversion joint 20, the sliding block 19, the brake nut 13, the brake screw rod 12 and the machine shell 1 form a four-bar mechanism. The brake shoe component 3 is fixed on a connecting rod of the four-bar mechanism, and two ends of the brake shoe component are respectively connected with the shell and the conversion joint through shaft holes and matched with bolts to form a revolute pair so as to transmit power and realize the braking of the rail transit.
The parking mechanism part comprises a parking motor 27, a parking motor base 18, a third bevel gear 28, a fourth bevel gear 29, a first brake block 30, a second brake block 31, a brake guide rail 32, a parking screw 33 and the like. The output head of the parking motor 27 realizes output reversing through a third bevel gear 28 and a fourth bevel gear 29, and the fourth bevel gear 29 is fixed with the parking screw 33, so that the parking motor 27 drives the parking screw 33 to rotate. The parking screw 33 is a bidirectional screw, the first brake pad 30 and the second brake pad 31 are respectively arranged at two spiral parts of the parking screw 33, and the first brake pad 30 and the second brake pad 31 are arranged at the brake guide rail 32 in a sliding way. Therefore, the first brake block 30 and the second brake block 31 are matched through a screw pair to realize a linear motion pair, and the brake guide rail 32 and the brake blocks prevent the brake blocks from overturning through a dovetail groove. The parking screw 33 is supported by a third rolling bearing 34 and a third bearing housing 35, and the third bearing housing 35 is fixed to the cabinet 1 by a fourth bolt 36 and a fourth hexagonal nut 37. The parking motor 27 drives the parking screw rod 33 to rotate, so that the first brake block 30 and the second brake block 31 move towards each other to clamp the worm 8 and prevent the worm from rotating, the braking torque is maintained, and the parking brake of the train is realized.
Alternatively, the parking screw 33 is a one-way screw, one side of the worm 8 is provided with a first brake block 30 in threaded connection with the parking screw 33, the other side of the worm 8 is provided with a stationary second brake block 31, the parking screw 33 is driven to rotate so that the first brake block 30 slides along the axial direction of the parking screw 33, and the worm 8 is clamped by the first brake block 30 and the second brake block 31, so that the braking torque is maintained.
The braking device has certain limitation on the working space of the connecting rod, so that the proper distance between the braking device and a part to be braked can be ensured in order to ensure the braking effect.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention is described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A rail transit brake device is characterized by comprising a brake mechanism and a parking mechanism;
the brake mechanism includes: the brake device comprises a brake motor (4), a worm (8) driven by the brake motor (4), a worm wheel (9) orthogonally meshed with the worm (8), a brake screw rod (12) driven by the worm wheel (9), and a brake nut (13) which is spirally arranged on the brake screw rod (12) and can linearly move along the axial direction of the brake screw rod (12) and is used for outputting brake force to a brake shoe assembly (3);
the parking mechanism includes: the parking brake device comprises a parking motor (27), a parking screw rod (33) driven by the parking motor (27), and brake blocks (30, 31) which are spirally arranged on the parking screw rod (33) and can linearly move along the axial direction of the parking screw rod (33), wherein the brake blocks (30, 31) are suitable for clamping the worm (8) in the radial direction, enabling the worm (8) to be static, keeping the braking torque and realizing the parking brake of the train.
2. A rail transit brake rigging according to claim 1, wherein: a motor shaft (5) of the brake motor (4) drives the worm (8) through a first gear reversing mechanism (6, 7).
3. A rail transit brake rigging according to claim 1, wherein: the parking motor (27) drives the parking screw rod (33) through a second gear reversing mechanism (28, 29).
4. A rail transit brake rigging according to claim 1, wherein: the conversion joint (20) and the brake shoe assembly (3) are matched through a bolt shaft hole to form a revolute pair, a sliding block (19) is arranged at the front end of the brake nut (13), and the sliding block (19) is connected with the conversion joint (20) in a sliding mode through a vertical dovetail groove.
5. A rail transit brake rigging according to claim 1, wherein: the parking screw rod (33) is a bidirectional screw rod, and the first brake block (30) and the second brake block (31) are respectively arranged on two spiral parts of the parking screw rod (33).
6. A rail transit brake rigging according to claim 1, wherein: the parking screw rod (33) is a one-way screw rod, a first brake block (30) in threaded connection with the parking screw rod (33) is arranged on one side of the worm (8), a static second brake block (31) is arranged on the other side of the worm (8), the parking screw rod (33) is driven to rotate to enable the first brake block (30) to axially slide along the parking screw rod (33), and the worm (8) is clamped by the first brake block (30) and the second brake block (31) to achieve the holding of the braking torque.
7. A rail transit brake rigging according to claim 1, wherein: still include casing (1), brake motor (4) and parking motor (27) are fixed in casing (1), worm (8), brake screw (12) and parking lead screw (33) rotate through the bearing respectively and set up in casing (1), and brake shoe subassembly (3) jib hoist and mount are in casing (1).
8. A rail transit brake rigging according to claim 7, wherein: the worm (8) is rotatably arranged on the machine shell (1) through a first rolling bearing (10) and a first rolling bearing seat (11); the rear end of the brake screw rod (12) is supported on the machine shell (1) through a second rolling bearing (14), a thrust bearing (15) and a second bearing seat (16); the parking screw rod (33) is rotatably arranged on the machine shell (1) through a third rolling bearing (34) and a third bearing seat (35).
9. A rail transit brake rigging according to claim 1, wherein: the turbine (9) and the brake screw rod (12) are fixed into a whole, or the turbine (9) and the brake screw rod (12) are connected through a key so as to transmit braking torque.
10. A rail transit brake rigging according to claim 9, wherein: and a supporting circular ring (17) positioned in front of the turbine (9) is arranged on the brake screw rod (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010289268.7A CN111409614A (en) | 2020-04-14 | 2020-04-14 | Rail transit braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010289268.7A CN111409614A (en) | 2020-04-14 | 2020-04-14 | Rail transit braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111409614A true CN111409614A (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010289268.7A Pending CN111409614A (en) | 2020-04-14 | 2020-04-14 | Rail transit braking device |
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|---|---|
| CN (1) | CN111409614A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158683A (en) * | 2011-12-13 | 2013-06-19 | 现代摩比斯株式会社 | Electric parking brake apparatus |
| CN104442895A (en) * | 2014-11-26 | 2015-03-25 | 南京浦镇海泰制动设备有限公司 | Tread brake |
| CN104890657A (en) * | 2014-03-05 | 2015-09-09 | 上海通用汽车有限公司 | Electric power-assisting braking mechanism and control method thereof |
| CN106164529A (en) * | 2013-12-30 | 2016-11-23 | 底盘制动系统国际有限公司 | There is the actuator of the sub-assembly of gear drive and equipped with the drum brake of this actuator and brake unit |
| KR20170064429A (en) * | 2015-12-01 | 2017-06-09 | 엘지이노텍 주식회사 | Parking brake actuator |
| CN207393932U (en) * | 2017-09-30 | 2018-05-22 | 科力远混合动力技术有限公司 | Electronic brake mechanism |
| CN208248203U (en) * | 2017-09-06 | 2018-12-18 | 上海六辔机电科技有限公司 | A kind of rail vehicle motor driven friction stopping device |
| CN109424670A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| US20190383391A1 (en) * | 2018-06-13 | 2019-12-19 | Continental Powertrain USA, LLC | Electric park lock actuator limited rotary disconnect |
| CN110696787A (en) * | 2019-10-28 | 2020-01-17 | 北京三快在线科技有限公司 | Chassis and vehicle |
| CN110696797A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Pressure generating apparatus for brake system of vehicle |
| CN110966319A (en) * | 2019-12-30 | 2020-04-07 | 燕山大学 | Completely linear electronic mechanical brake device |
-
2020
- 2020-04-14 CN CN202010289268.7A patent/CN111409614A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158683A (en) * | 2011-12-13 | 2013-06-19 | 现代摩比斯株式会社 | Electric parking brake apparatus |
| CN106164529A (en) * | 2013-12-30 | 2016-11-23 | 底盘制动系统国际有限公司 | There is the actuator of the sub-assembly of gear drive and equipped with the drum brake of this actuator and brake unit |
| CN104890657A (en) * | 2014-03-05 | 2015-09-09 | 上海通用汽车有限公司 | Electric power-assisting braking mechanism and control method thereof |
| CN104442895A (en) * | 2014-11-26 | 2015-03-25 | 南京浦镇海泰制动设备有限公司 | Tread brake |
| KR20170064429A (en) * | 2015-12-01 | 2017-06-09 | 엘지이노텍 주식회사 | Parking brake actuator |
| CN109424670A (en) * | 2017-08-29 | 2019-03-05 | 比亚迪股份有限公司 | Disk brake and vehicle |
| CN208248203U (en) * | 2017-09-06 | 2018-12-18 | 上海六辔机电科技有限公司 | A kind of rail vehicle motor driven friction stopping device |
| CN207393932U (en) * | 2017-09-30 | 2018-05-22 | 科力远混合动力技术有限公司 | Electronic brake mechanism |
| US20190383391A1 (en) * | 2018-06-13 | 2019-12-19 | Continental Powertrain USA, LLC | Electric park lock actuator limited rotary disconnect |
| CN110696797A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Pressure generating apparatus for brake system of vehicle |
| CN110696787A (en) * | 2019-10-28 | 2020-01-17 | 北京三快在线科技有限公司 | Chassis and vehicle |
| CN110966319A (en) * | 2019-12-30 | 2020-04-07 | 燕山大学 | Completely linear electronic mechanical brake device |
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Application publication date: 20200714 |