CN112793596A - Rack structure based on screw rack transmission - Google Patents
Rack structure based on screw rack transmission Download PDFInfo
- Publication number
- CN112793596A CN112793596A CN202110375474.4A CN202110375474A CN112793596A CN 112793596 A CN112793596 A CN 112793596A CN 202110375474 A CN202110375474 A CN 202110375474A CN 112793596 A CN112793596 A CN 112793596A
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- rack
- threaded
- wheel
- thread
- rail
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/02—Rack railways
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/02—Tracks for rack railways
- E01B25/04—Rack rails; Supports or connections for rack rails
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a rack structure based on threaded rack transmission, and relates to the technical field of rail transit. The engine is characterized by mainly comprising a rack, a threaded wheel, an engine and a shock absorber. The tooth rail is positioned between two parallel steel rails of the railway track and is arranged along the longitudinal direction; the threaded wheel is arranged at the bottom of the longitudinal axis of the locomotive, and the threaded wheel is meshed with the rack rail in a multi-tooth manner; the engine is connected to the two longitudinal ends of the threaded wheel; the shock absorber is mounted between the threaded wheel and the locomotive. The invention solves the problems of impact load, short service life and high noise of the gear and the rack in the prior rack railway operation, and provides a safe, quiet, durable and stable transmission rack railway structure.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to the technical field of a rack rail railway, and particularly relates to a rack rail structure based on threaded rack transmission.
Background
The rack-and-pinion railway is a rail transit form which is driven by a gear and a rack and can meet the requirement of an ultra-large slope. Specifically, on the basis of the traditional railway, a gear is arranged on a train running mechanism, a corresponding rack is arranged on a track, and traction force and braking force are provided by means of the meshing action between the gear and the rack, so that the problem of insufficient friction force between wheels of a locomotive and the track when the locomotive runs on a large slope is solved, and the locomotive is driven to run on the track with the large slope.
The rack system which is put into use at present mainly comprises the following components: the rack rail of the Riggenbach system consists of a plurality of steel plates, and the middle of the Riggenbach system is connected by a cylinder at a fixed interval; abt system, its rack consists of two vertical steel plates, the upper part is milled and cut with machine and matched with multiple gears, to ensure at least one gear is engaged with the rack in the running process of the locomotive; the Strub system is similar to Abt, but has a wider rack; the teeth of the rack of the Locher system are arranged on two sides of the central steel rail, and the locomotive is meshed with the rack on the left side and the right side by two gears simultaneously and has a horizontal tooth structure.
It can be seen that the current rack system all adopts the meshing form of the gear and the rack, and the difference lies in the meshing position and the meshing number of the gear and the rack. But through the discovery after actually putting into service, traditional gear and rack meshing form need bear because of the impact load that the noodless spare sudden change produced of work, so the impact wear damage of gear and rack often appears, and life is short, need often maintain gear and rack and change in order to guarantee operation safety, and this has increased the rack railway operation and maintenance cost. Meanwhile, the collision between the gear and the rack rail in the running process of the locomotive can generate larger noise, and the riding comfort of passengers is influenced. Therefore, a safe, quiet, durable, smooth-running rack system is urgently sought.
Based on the problems, the invention provides a rack rail structure based on threaded rack transmission, and creatively provides a novel rack rail system, wherein the protruding difference of the novel rack rail structure is that threaded wheels can be arranged along the length direction of a locomotive, and the novel rack rail system provides friction force along the line direction required by the operation of the locomotive on a large slope by utilizing multi-tooth continuous meshing spiral transmission between the threaded wheels and the rack rail. This novel rack system agrees with the demand of rack railway to the structure transmission steadily, small in noise, longe-lived, when improving driving comfort level, reduces operation and maintenance cost by a wide margin.
Disclosure of Invention
The invention aims to provide a rack rail structure based on thread rack transmission, solves the problems of easy generation of impact load between a gear and a rack, short service life and high noise during the operation of the conventional rack rail railway, and provides a safe, quiet, durable and stable-transmission rack rail railway structure.
In order to achieve the above purpose, the present invention provides a rack structure based on a threaded rack drive, mainly comprising the rack, the threaded wheel, the engine and the shock absorber, and specifically comprising the following structures.
The tooth rail is arranged between the two parallel steel rails and is longitudinally arranged along the line; the material of the rack rail is the same as that of the steel rail, and the rack rail is also made of high-manganese steel material with high wear resistance.
Furthermore, the tooth spaces of the toothed rails are inclined grooves, namely, an included angle is formed between the tooth spaces of the toothed rails and the central axis of the toothed rails, and the direction of the tooth spaces of the toothed rails is the same as the spiral line direction of the threaded wheel.
Furthermore, the cross section of the rack is an arc-shaped groove with a low middle part and high two ends, and the curvature of the arc-shaped groove is the same as that of the surface of the threaded wheel.
Furthermore, the rack and the threaded wheel are meshed in a multi-tooth mode and are meshed continuously, namely, the meshing surface of the threaded wheel is continuously attached to the rack.
The threaded wheel is arranged at the bottom of the locomotive, and the axis of the threaded wheel is arranged along the running direction of the locomotive; the threaded wheel and the locomotive steel wheel belong to two power systems respectively, and different power equipment is used for providing traction force required by climbing for the locomotive.
Furthermore, the thread shape of the thread wheel is trapezoidal, and the number of threads is double; the single thread is used for connection, and the multiple threads are used for transmission, so that the thread wheel belongs to transmission threads; the thread tops of the thread wheels are narrow, and the thread bottoms of the thread wheels are wide; the spiral line direction of the thread wheel is right-handed.
Furthermore, a ball groove is formed in the thread crest of the thread wheel, a spherical ball is contained in the ball groove, and sliding friction between the thread wheel and the bottom of the rack groove can be converted into rolling friction.
The engine is two engines of the same type, the engine sets up in the longitudinal both ends of screw thread wheel, for the screw thread wheel rotation provides power, the engine with the screw thread wheel provides a new driving system for the locomotive climbing, when having overcome the tradition and only relying on the frictional force between wheel and rail to climb, the problem that the frictional force is not enough between wheel and the rail when traveling on great slope.
The shock absorber is mounted between the threaded wheel and the locomotive.
The embodiment of the invention brings the following beneficial effects.
The invention provides a rack structure based on thread rack transmission, wherein a plurality of teeth are continuously meshed between a thread wheel and a rack, so that higher friction force and bearing capacity can be provided; and for traditional gear tooth rail system, screw thread tooth rail system relies on screw drive, has advantages such as transmission is steady, and the noise is little.
The invention solves the problem that impact load is easily generated between the gear and the rack when the existing gear rack system works, so that the gear and the rack are damaged by impact abrasion, and each part of the rack structure based on the thread rack transmission has longer service life.
The thread tops of the thread wheels are provided with the ball grooves and the balls, so that sliding friction between the thread wheels and the bottoms of the rack grooves can be converted into rolling friction, resistance of the rack structure based on thread rack transmission is reduced, and power required by locomotive running is effectively reduced.
The threaded wheel can be longitudinally installed along the locomotive, is not limited by the position of the steel wheel transmission mechanism of the locomotive, and has the characteristic of flexible installation.
The cross section of the rack rail is designed into an arc-shaped groove with a low middle part and high two ends, so that the transverse resistance between the threaded wheel and the rack rail can be increased, and the transverse wind load resistance of the locomotive in operation on a high and steep road section is improved.
The matching between the threaded wheel and the rack has self-locking performance, namely the threaded wheel can freely advance or retreat on the rack through self rotation, once the threaded wheel stops rotating, no movement can be generated between the threaded wheel and the rack, and therefore the emergency braking of the locomotive can be realized through quickly reducing the rotating speed of the threaded wheel.
By providing the two motors at both ends of the screw wheel, more power can be provided.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description. Or may be learned by practice of the invention.
Drawings
The invention is described in further detail below with reference to the figures and the detailed description.
FIG. 1 is a schematic diagram of a rack structure mainly comprising a device based on a threaded rack transmission;
FIG. 2 is a schematic illustration of a rack in a rack configuration based on a threaded rack drive;
FIG. 3 is a schematic view of a threaded wheel in a rack and pinion configuration based on a threaded rack drive;
FIG. 4 is a schematic view of the engagement operation of the threaded wheel and the rack.
In the figure: 1-a thread wheel, 2-a rack rail, 3-an engine, 4-a shock absorber, 5-a spherical ball, 6-a rack rail cross section, 7-a rack rail groove, 8-a thread crest of the thread wheel and 9-a thread bottom of the thread wheel.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described with reference to the accompanying drawings, it is to be noted that technical solutions and technical features provided in the present invention in various portions including the following description may be combined with each other without conflict.
Moreover, the embodiments of the invention described in the following description are generally only some embodiments of the invention, rather than all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
As shown in fig. 1, the rack structure based on the screw rack transmission mainly comprises the screw wheel, the rack, the engine and the shock absorber, and specifically comprises: 1-a thread wheel, 2-a rack rail, 3-an engine, 4-a shock absorber, 5-a spherical ball, 6-a rack rail cross section, 7-a rack rail groove, 8-a thread crest of the thread wheel and 9-a thread bottom of the thread wheel.
As shown in fig. 1, the engines 3 are two engines of the same type, and the two engines 3 are respectively arranged at two longitudinal ends of the threaded wheel 1 and simultaneously provide power for the rotation of the threaded wheel 1; the shock absorber 4 is installed between the threaded wheel 1 and the locomotive for absorbing shock.
As shown in fig. 2, the material of the rack 2 is consistent with that of the steel rail, and is also made of high manganese steel; the rack rail groove 7 is a chute, namely, an included angle is formed between the rack rail groove 7 and the central axis of the rack rail 2; the inclination direction of the rack rail groove 7 is the same as the spiral line direction of the threaded wheel 1; the tooth track cross section 6 is an arc-shaped groove with a low middle part and high two ends, and the curvature of the arc-shaped groove is the same as that of the surface of the threaded wheel 1.
As shown in fig. 3, the threaded wheel 1 is a double thread, a single thread is used for connection and a multiple thread is used for transmission, so that the threaded wheel 1 belongs to transmission threads; the spiral line direction of the threaded wheel 1 is right-handed; the thread form of the thread wheel 1 is trapezoidal, the thread crest 8 of the thread wheel is narrow, and the thread root 9 of the thread wheel is wide, so that the thread wheel 1 is convenient to mesh with the tooth rail 2, and the meshing area is increased, so that the friction force is increased; the thread crest 8 of the thread wheel is provided with a ball groove which contains the spherical ball 5, so that the sliding friction between the thread wheel 1 and the groove bottom of the rack 2 can be converted into rolling friction, and the power required by the operation of the locomotive is reduced.
The specific implementation is as follows.
The installation mode of each part of the rack rail structure based on the transmission of the threaded rack is as follows: the tooth rail 2 is formed by forging, milling and cutting a high manganese steel material, the shape of the tooth rail is as shown in figure 2, and when the tooth rail 2 is laid, the tooth rail is laid between two parallel steel rails of a railway track and is laid along the length direction of a line. The threaded wheel 1 and the engine 3 form a new tooth track power system, the engine 3 is installed at two longitudinal ends of the threaded wheel 1, and the two engines 3 synchronously do work with the same power to provide power for the threaded wheel 1. The shock absorber 4 is installed between the threaded wheel 1 and the locomotive for absorbing shock.
When the rack rail structure based on the threaded rack transmission works, the engine 3 provides power, the threaded wheel 1 rotates under the action of the power, and the threaded wheel 1 rotates in the rack rail groove 7 to generate traction force along the advancing direction of the locomotive so as to draw the locomotive to advance. The form of the engagement between the threaded wheel 1 and the rack 2 is shown in fig. 4 and comprises two parts; the threaded wheel 1 is in contact with the bottom surface of the rack rail groove 7 in a manner that the spherical ball 5 is in rolling contact with the bottom surface of the rack rail groove 7, and at the moment, in the rotation process of the threaded wheel 1, the spherical ball 5 rolls to generate rolling friction with the bottom surface of the rack rail groove 7, so that the running resistance is reduced, and the power required by the running of the locomotive is reduced; in the second part, the threaded wheel 1 is in contact with the side wall of the rack rail groove 7 in a continuous meshing mode, and the contact mode is sliding friction, so that the meshing area is large, and the main way of providing the adhesion force required by the climbing of the locomotive is provided.
When the locomotive climbs a slope in a high and steep area and is subjected to larger transverse wind load, the arc-shaped groove shape with the low middle part and the high two ends of the tooth rail cross section 6 can provide transverse resistance, and the transverse wind load resistance of the locomotive is improved.
When the rack rail structure based on the thread rack transmission is braked, the rotating speed of the thread wheel 1 is rapidly reduced, and partial braking force required by the locomotive is provided; because the threaded rack structure has self-locking property, namely the threaded wheel 1 can freely advance or retreat on the rack 2 through self rotation, once the threaded wheel 1 stops rotating, relative movement between the threaded wheel 1 and the rack 2 cannot be generated, and the emergency braking of the locomotive can be realized by quickly reducing the rotating speed of the threaded wheel 1.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The rack structure based on the thread rack transmission is characterized by mainly comprising a rack, a thread wheel, an engine and a shock absorber; the tooth rail is positioned between two parallel steel rails of the railway track and is arranged along the longitudinal direction; the threaded wheel is arranged at the bottom of the longitudinal axis of the locomotive, and the threaded wheel is meshed with the rack rail in a multi-tooth manner; the engine is connected to the two longitudinal ends of the threaded wheel; the shock absorber is mounted between the threaded wheel and the locomotive.
2. The rack structure based on the threaded rack drive according to claim 1, wherein the rack cross section is an arc-shaped groove with a low middle part and high two ends, and the curvature of the arc-shaped groove is the same as that of the surface of the threaded wheel.
3. A rack structure based on a threaded rack drive according to claim 1, characterized in that the direction of the tooth grooves of the rack is the same as the helical direction of the threaded wheel, and the cross-sectional shape of the tooth grooves is trapezoidal.
4. The rack rail structure based on the threaded rack drive according to claim 1, wherein the threaded wheel is installed along the length direction of the locomotive, and a multi-tooth continuous meshing spiral drive is adopted between the threaded wheel and the rack rail to generate traction force along the advancing direction of the locomotive.
5. The rack structure based on the threaded rack drive according to claim 1, wherein the thread wheel is a double thread with a trapezoidal thread profile, the thread of the thread wheel is narrow in crest and wide in root, and the spiral line direction of the thread wheel is right-handed.
6. A rack and pinion arrangement based on a threaded rack drive according to claim 1, characterised in that the thread crests of the thread wheels are provided with ball grooves containing spherical balls.
7. A rack and pinion arrangement based on a threaded rack drive according to claim 1, characterised in that two motors are provided at both longitudinal ends of the threaded wheel, said motors operating synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375474.4A CN112793596A (en) | 2021-04-08 | 2021-04-08 | Rack structure based on screw rack transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375474.4A CN112793596A (en) | 2021-04-08 | 2021-04-08 | Rack structure based on screw rack transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112793596A true CN112793596A (en) | 2021-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110375474.4A Pending CN112793596A (en) | 2021-04-08 | 2021-04-08 | Rack structure based on screw rack transmission |
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| Country | Link |
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| CN (1) | CN112793596A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716350A (en) * | 1980-07-04 | 1982-01-27 | Chugoku Electric Power Co Ltd:The | Flaw detection of high temperature vessel by ultrasonic wave |
| JPH01271312A (en) * | 1988-04-20 | 1989-10-30 | Matsushita Electric Ind Co Ltd | Conveyor |
| CN1749078A (en) * | 2005-06-22 | 2006-03-22 | 林有 | Screw-pushing type climbing train |
| CN103209919A (en) * | 2010-08-06 | 2013-07-17 | 科尔伊埃莱瓦托株式会社 | Worm gear-type driving unit, and elevator and elevator system using worm gear-type driving unit |
| CN110588673A (en) * | 2019-10-11 | 2019-12-20 | 浙江正泰新能源开发有限公司 | Transport means is used in grassland construction |
| CN209958160U (en) * | 2019-03-29 | 2020-01-17 | 西南交通大学 | Rack rail structure of rack rail railway |
| WO2020030294A1 (en) * | 2018-08-08 | 2020-02-13 | Global Systems Solutions GmbH | Transport system for transporting and/or positioning objects along a transport route, and transport body for such a transport system |
-
2021
- 2021-04-08 CN CN202110375474.4A patent/CN112793596A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716350A (en) * | 1980-07-04 | 1982-01-27 | Chugoku Electric Power Co Ltd:The | Flaw detection of high temperature vessel by ultrasonic wave |
| JPH01271312A (en) * | 1988-04-20 | 1989-10-30 | Matsushita Electric Ind Co Ltd | Conveyor |
| CN1749078A (en) * | 2005-06-22 | 2006-03-22 | 林有 | Screw-pushing type climbing train |
| CN103209919A (en) * | 2010-08-06 | 2013-07-17 | 科尔伊埃莱瓦托株式会社 | Worm gear-type driving unit, and elevator and elevator system using worm gear-type driving unit |
| WO2020030294A1 (en) * | 2018-08-08 | 2020-02-13 | Global Systems Solutions GmbH | Transport system for transporting and/or positioning objects along a transport route, and transport body for such a transport system |
| CN209958160U (en) * | 2019-03-29 | 2020-01-17 | 西南交通大学 | Rack rail structure of rack rail railway |
| CN110588673A (en) * | 2019-10-11 | 2019-12-20 | 浙江正泰新能源开发有限公司 | Transport means is used in grassland construction |
Non-Patent Citations (1)
| Title |
|---|
| 赵志刚等: "《机械精度设计》", 31 July 2014, 中国铁道出版社 * |
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Application publication date: 20210514 |