WO2020007075A1

WO2020007075A1 - Variable-gauge wheelset and variable-gauge bogie

Info

Publication number: WO2020007075A1
Application number: PCT/CN2019/079546
Authority: WO
Inventors: 魏家麒; 乔青峰; 蒯荣生; 杨欣; 李忠文; 王旭; 于祥; 臧晓蕾; 张宝安; 黄运华; 刘晓妍
Original assignee: 中车青岛四方机车车辆股份有限公司
Priority date: 2018-07-05
Filing date: 2019-03-25
Publication date: 2020-01-09

Abstract

Disclosed are a variable-gauge wheelset and a variable-gauge bogie; the variable-gauge wheelset comprises wheels (2), an axle (1), and a locking mechanism; the wheels are located at both ends of the axle, and are connected to the axle by means of splines; the outer side of the wheel hub extends outward to form an elongated connecting sleeve; the locking mechanism is press-mounted on a connecting sleeve, and is located in an axle housing (3) at both ends of the axle; the locking mechanism is provided with a locking rod (16) which passes through the bottom of the axle housing; the locking rod can lock or unlock the locking mechanism under the effect of an external force, thereby locking or unlocking the wheel. The present application implements a variable gauge safely and reliably.

Description

Variable gauge wheelset and variable gauge bogie

cross reference

This application refers to the Chinese patent application No. 2018107318282 with the patent name “A Variable Gauge Wheelset and Variable Gauge Bogie” filed on July 05, 2018, and the patent name filed on July 05, 2018 is Chinese Patent Application No. 2018107303925 for "A Locking Mechanism for Variable Gauge Wheelset and Variable Gauge Wheelset", and the patent name filed on July 05, 2018 is "A Shaft for Variable Gauge Wheelset "Box structure and variable gauge wheel pair" Chinese Patent Application No. 2018107321853, the above patent applications are all incorporated into this application by reference.

Technical field

The present application relates to the technical field of variable gauge of rail vehicles, and in particular to a variable gauge wheelset and a variable gauge bogie.

Background technique

With the rapid development of global economic integration, cross-border passenger and cargo transportation has grown rapidly in recent years. However, due to the different gauges of railways in various countries, it has caused serious obstacles to cross-border rail transportation. In order to solve the problem of the different gauges of the railways in various countries, which hinders the cross-border railway transportation, a variable gauge train is proposed, that is, by changing the wheels on its own wheelset when the train runs on the railways of other countries The distance between them to adapt to the gauge of other countries' railways.

In the process of changing the gauge of a train, the distance between the wheels set at both ends of the axle will be adjusted. At this time, the wheels need to be moved in the axis direction of the axle. After the distance between the wheels is adjusted, the wheels need to The axis of the axle remains fixed. The existing variable gauge wheelset has a complicated structure, and its reliability is not high when changing gauges, which cannot meet the current needs for changing gauges of trains.

Summary of the invention

(1) Technical problems to be solved

This application is intended to solve at least one of the technical problems existing in the prior art or related technologies.

The purpose of this application is to provide a variable gauge wheelset and a variable gauge truck with a simple structure and reliable gauge change.

(Two) technical solutions

In order to solve the above technical problems, an embodiment of the present application provides a variable gauge wheelset including a wheel, an axle, and a locking mechanism, the wheels are provided at both ends of the axle, and are connected to the axle through a spline; An extended connecting sleeve is formed on the outside of the hub of the wheel, and the locking mechanisms are respectively press-fitted on the connecting sleeve and are located in the axle boxes at both ends of the axle; the locking mechanism is provided with a through hole. Through the locking lever at the bottom of the axle box, the locking lever can lock or unlock the locking mechanism under the action of external force, thereby locking or unlocking the wheel.

Wherein, the locking mechanism is further provided with a bearing assembly and a bearing housing, the inner ring of the bearing assembly is press-fitted on the outer periphery of the connection sleeve, and the outer ring of the bearing assembly is press-fitted on the inner periphery of the bearing housing. , The outer periphery of the bearing housing and the shaft case are clearance fit.

Wherein, an annular positioning boss is provided on the inner periphery of the bearing housing, and the annular positioning boss separates the inner peripheral surface of the bearing housing into a press-fitting working surface and a locking working surface, and the outer ring of the bearing assembly Press-fitting on the press-fitting working surface;

A set of gauge changing grooves are provided on the radially opposite sides of the locking working surface, each set of gauge changing grooves includes a plurality of gauge changing grooves spaced along the axial direction, and the locking working surface A through gap is opened from below the two sets of gauge changing grooves, the locking lever includes two symmetrical locking pins and an unlocking lever hinged to the two locking pins, and two locking The pins are respectively configured to be inserted into a single of the gauge change grooves of a corresponding group to achieve wheel locking, and the unlocking lever extends from the notch to the bearing jacket and the shaft case, and can be under the action of an external force. The lock pin is separated from the gauge changing groove where the lock pin is located to realize wheel unlocking.

Wherein, the locking pins each include a horizontal segment and a concave arc segment, one end of the horizontal segment is connected to the lower end of the arc segment, and the upper end of the arc segment is provided with a gauge change. A locking surface with a matching groove, the other end of the horizontal section is provided with a first hinge hole; the upper end of the unlocking lever is provided with a second hinge hole, and the hinge shaft passes through the first hinge hole and the second hinge Hole to realize the hinged connection between the two locking pins and the unlocking lever; the axes of the first hinge hole and the second hinge hole are both parallel to the axis of the bearing housing.

The lower end of the unlocking lever is provided with a T-type unlocking head.

Wherein, the lower end of the connection between the horizontal section and the circular arc section is provided with an arc matching surface, the upper surface of the bottom plate of the shaft box body is respectively provided with two positioning pins, and the positioning pins are sleeved with supporting springs. A spring support seat is sleeved on the support spring, and an arc matching groove matching the arc mating surface is provided on the top of the spring support seat, and the lock pin is rotatably supported by the arc mating surface. In the arc-fitting groove.

Wherein, the shaft box is further provided with a locking pin limiter on the outside of the two positioning pins, and the arc segment of the locking pin is configured to support and limit the locking pin to the locking pin. In the limit seat.

Wherein, the bottom plate of the shaft box is provided with a through hole through which the unlocking lever passes, and the shape and size of the through hole match the sectional shape and size of the unlocking lever.

Wherein, the locking working surface is a three-quarter arc surface, and the notch is a quarter arc surface;

The bearing assembly includes a bearing, a bearing retaining ring and a sealing ring. The bearing retaining ring is provided at both ends of the bearing, and the sealing ring is provided between the bearing retaining ring and the two ends of the bearing. And one end of the bearing assembly abuts against the annular positioning boss.

Wherein, each set of gauge conversion slots includes two gauge conversion slots, and the distance between the two gauge conversion slots is equal to half the required gauge change; the groove bottom of the gauge conversion slots is An arc surface corresponding to the arc surface of the bearing housing; the locking surface is an arc surface matching the arc surface.

An embodiment of the present application further provides a variable gauge truck, which includes the variable gauge wheelset described above.

An embodiment of the present application further provides a locking mechanism for a variable gauge wheelset, which includes a bearing jacket and a locking rod. An inner periphery of the bearing jacket is provided with an annular positioning boss, and the annular positioning boss carries the bearing. The inner peripheral surface of the jacket is divided into a locking working surface and a press-fitting working surface;

A set of gauge changing grooves are provided on the radially opposite sides of the locking working surface, each set of gauge changing grooves includes a plurality of gauge changing grooves spaced along the axial direction, and the locking working surface A through gap is opened from below the two sets of gauge changing grooves, the locking lever includes two symmetrical locking pins and an unlocking lever hinged to the two locking pins, and two locking The pins are respectively configured to be inserted into a corresponding one of the gauge change grooves of the corresponding group to achieve locking, and the unlocking lever extends out of the bearing housing from the gap, and can cause the locking pin to leave under an external force. The gauge change slot is located to unlock it.

Wherein, the locking mechanism further includes a bearing assembly and an inner sleeve, and the outer ring of the bearing assembly is press-fitted on the press-fitting working surface of the bearing housing; the inner ring of the bearing assembly is press-fitted on the press-fitting working surface. The outer periphery of the inner sleeve is configured to be fixedly connected to the outside of the hub of the wheel.

Wherein, the locking mechanism is installed on the axle outside the wheel through the inner sleeve, and is located in the axle boxes at both ends of the axle; the bearing outer sleeve is fitted with the axle box in a clearance fit.

The lower end of the unlocking lever is provided with a T-type unlocking head.

An embodiment of the present application further provides a shaft box structure for a variable gauge wheel pair, which includes a shaft box body, and a channel is provided in the shaft box body along its axial direction, and the channel is configured to install a bearing that slides with the bearing. A casing and a locking lever configured to lock or unlock the bearing casing; a bottom of the shaft box body is provided with a matching hole communicating with the channel; an inner periphery of the bearing casing is provided with an annular positioning boss; The annular positioning boss separates the inner peripheral surface of the bearing housing into a locking working surface and a press-fitting working surface;

A set of gauge changing grooves are provided on the radially opposite sides of the locking working surface, each set of gauge changing grooves includes a plurality of gauge changing grooves spaced along the axial direction, and the locking working surface A through gap is opened from below the two sets of gauge changing grooves, and the locking lever includes two locking pins and an unlocking lever hinged to the two locking pins, and the unlocking lever is from the gap The bearing housing extends out and passes through the fitting hole, and the two locking pins are respectively configured to be inserted into a single set of gauge change grooves of a corresponding group, so as to realize the bearing housing relative to the axle box body. Locking, one end of the unlocking lever extending out of the axle box body can cause the locking pin to leave the gauge change groove where it is located under the action of external force, so as to unlock the bearing housing relative to the axle box body.

Wherein, the spring support seat is provided with a sinker hole, a top surface of the sinker hole forms a limiting surface, the sinker hole is configured to be sleeved on the support spring, and an upper end of the support spring and The limiting surface abuts; the lower end of the support spring abuts on the shaft box body on the outer periphery of the positioning pin.

Wherein, the natural length of the support spring is greater than the height of the positioning pin.

Wherein, the upper end of the locking pin limiting seat is provided with a limiting slot, and the opening width of the limiting slot matches the width of the arc segment.

Wherein, the shape and size of the fitting hole are adapted to the cross-sectional shape and size of the unlocking lever.

A support plate is provided at the bottom of the shaft box, and the support plate is coated with a wear-resistant material.

(Three) beneficial effects

Compared with the prior art, this application has the following advantages:

A variable gauge wheelset provided in the present application includes a wheel, an axle, and a locking mechanism. The wheel is provided at both ends of the axle and is splined to the axle to distribute torque uniformly on the wheel. The inner circumference of the wheel is convenient for transmitting torque and sliding the wheel along the axle to achieve variable gauge; the outside of the hub of the wheel extends outward to form an elongated connection sleeve, and the locking mechanisms are press-fitted on the connection sleeve, respectively. It is convenient to install the locking mechanism and is located in the axle box at both ends of the axle; the locking mechanism is provided on the outside of the wheel, and the axle on the inner part of the wheel is consistent with the traditional axle; on the one hand, the motor installed on the inner axle of the wheel, The gear box and other components have sufficient design space, on the other hand, it can be consistent with the interface of the existing car, which facilitates the mass transformation of the existing car. The locking mechanism is provided with a locking rod that passes through the bottom of the shaft box. The locking lever can lock or unlock the locking mechanism under the action of an external force, thereby locking or unlocking a wheel fixedly connected to the locking mechanism; it is convenient for the wheel to change the gauge to adapt to With gauge conversion needs. The variable gauge wheelset of the present application is reliable in locking and convenient in unlocking, and meets the needs of the variable gauge of a train.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a variable gauge wheel pair of the present application;

Figure 2 is a side view of Figure 1;

FIG. 3 is a schematic diagram showing a cooperation relationship between a locking mechanism in a variable gauge wheel pair and a shaft box;

FIG. 4 is one of the structural schematic diagrams of the bearing jacket in the present application; FIG.

FIG. 5 is a second schematic structural diagram of a bearing jacket in the present application; FIG.

FIG. 6 is a third structural schematic diagram of a bearing jacket in the present application; FIG.

FIG. 7 is one of the structural schematic diagrams of the locking pin in the present application; FIG.

FIG. 8 is a second schematic structural diagram of a locking pin in the present application; FIG.

FIG. 9 is one of the structural diagrams of the unlocking lever in the present application; FIG.

FIG. 10 is a second schematic structural diagram of an unlocking lever in the present application; FIG.

In the picture: 1. Axle; 2. Wheels; 3. Axle box; 4. Press-fitting working surface; 5. Locking working surface; 6. Ring positioning boss; 7. Gauge changing groove; 8. Notch; 9 Locking pin; 91: Horizontal section; 92: Arc section; 10; Locking surface; 11. First hinge hole; 12. Arc matching surface; 13. Limit retaining ring; 14. Bearing; 15. Bearing Coat; 16, unlocking lever; 17, T-type unlocking head; 18, second hinge hole; 19, bottom plate; 20, positioning pin; 21, locking pin limit seat; 22: support spring; 23, channel.

detailed description

The specific implementation of the present application will be described in further detail below with reference to the drawings and embodiments. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application.

In the description of this application, it should be noted that the terms “center”, “portrait”, “horizontal”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “ The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this application and simplifying The description, rather than indicating or implying, the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of this application, it should be noted that the terms "installation", "connected", and "connected" should be understood in a broad sense, unless explicitly stated and limited otherwise. For example, they may be fixed connections or removable. Connection, or integral connection; it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In addition, in the description of the present application, unless otherwise stated, the meanings of "a plurality", "a plurality of roots", and "a plurality of groups" are two or more.

As shown in FIGS. 1-3, an embodiment of the present application provides a variable gauge wheelset including a wheel 2, an axle 1, and a locking mechanism. The wheels 2 are provided at both ends of the axle 1, and are connected with The axle 1 is connected by a spline. Specifically, an inner spline is provided on the inner periphery of the wheel hub of the wheel 2. The two ends of the axle 1 are respectively provided with outer splines that match the inner spline. The wheel 2 It is connected with the axle 1 through the inner spline and the outer spline, so that the torque is evenly distributed on the inner periphery of the wheel 2, which is not only convenient for transmitting the torque, but also for the wheel 2 to slide along the axle 1 to achieve variable gauge; the wheel The outer side of the hub of 2 is extended to form an elongated connecting sleeve. The connecting sleeve is integrated with the wheel 2 to ensure the structural reliability. The locking mechanisms are press-fitted on the connecting sleeve and located at the two ends of the axle 1. In the shaft case 3, a locking mechanism is fitted with the clearance of the shaft case 3; the locking mechanism is provided with a locking rod that passes through the bottom of the shaft case 3, and the locking rod can be moved up and down by an external force Lock or unlock the locking mechanism, thereby locking the wheels 2 connected to the locking mechanism Unlocking; thereby facilitating changing track gauge, the wheel 2, the track gauge change to accommodate different needs. Moreover, it is reliable to lock and easy to unlock, which meets the needs of trains with varying gauges.

Further, the locking mechanism is further provided with a bearing assembly and a bearing housing 15, an inner ring of the bearing assembly is press-fitted on an outer periphery of a connection sleeve of the wheel 2, and an outer ring of the bearing assembly is press-fitted on the outer ring. The inner periphery of the bearing casing 15 is connected to the bearing casing 15 and the wheel 2 through a bearing assembly, which is reliable and convenient for the rotation of the wheel 2. The outer periphery of the bearing casing 15 and the shaft case 3 are clearance-fitted to achieve the bearing casing 15 It can slide relative to the shaft box 3, and the axial size of the shaft box 3 is enlarged and a cavity is provided, and the cavity distance is half of the required variable gauge.

As shown in FIGS. 4-6, specifically, an annular positioning boss 6 is provided on the inner periphery of the bearing housing 15, and the annular positioning boss 6 separates the inner peripheral surface of the bearing housing 15 into a press-fitting working surface. 4 and the locking working surface 5, the outer ring of the bearing assembly is press-fitted in the press-fitting working surface 4, that is, the bearing housing 15 and the bearing assembly are in interference fit, and the connection is a reliable integrated structure;

A set of gauge changing grooves 7 are provided on the radially opposite sides of the locking working surface 5, respectively. Each set of gauge changing grooves 7 includes a plurality of gauge changing grooves 7 arranged at intervals in the axial direction. In the example, each group of the gauge conversion grooves 7 includes two gauge conversion grooves 7, and the distance between the two gauge conversion grooves 7 is equal to half of the required gauge change, and the locking works The surface 5 is provided with a notch 8 penetrating from below the two gauge change grooves 7. In this embodiment, the locking working surface 5 is a three-quarter arc surface, and the notch 8 is a quarter. A circular arc surface; the locking lever includes two symmetrical locking pins 9 and an unlocking lever 16 articulated to the two locking pins 9, and the two locking pins 9 are respectively configured to be inserted into corresponding groups In the single gauge change groove 7, the lock lever and the bearing housing 15 are fixed relative to the axle box 3, the wheel 2 is locked, and the unlock lever 16 extends from the bearing through the gap 8. The outer sleeve 15 and the shaft box 3 can cause the locking pin 9 to leave the gauge changing groove 7 under the action of an external force, such as a downward pulling force. The bearing housing 15 is separated from the locking lever. The integrated structure formed by the bearing housing 15, the bearing assembly and the wheel 2 has a sliding tendency with respect to the axle box 3 to realize the unlocking of the wheel 2. At this time, the wheel 2 is pushed in or out to move When changing the gauge distance, when the other gauge changing groove 7 is reached, the external force is cancelled, the unlocking lever 16 moves upward, and the locking pin 9 is inserted into the opposite gauge changing groove 7 by the inward thrust to achieve the locking, thereby completing Wheel 2 changes gauge, with simple structure and convenient operation.

As shown in FIG. 7-8, specifically, the locking pins 9 each include a horizontal section 91 and a concave arc section 92. One end of the horizontal section 91 is connected to the lower end of the arc section 92. The upper end of the circular arc segment 92 is provided with a locking surface 10 matching the gauge change groove 7, and the groove bottom of the gauge change groove 7 has an arc surface consistent with the arc surface of the bearing housing 15. The locking surface 10 is an arc surface matching the arc surface; the other end of the horizontal section 91 is provided with a first hinge hole 11; as shown in FIG. 9-10, an upper end of the unlocking lever 16 is provided with a first The two hinge holes 18 pass through the two first hinge holes 11 and the second hinge holes 18 through a hinge shaft to realize the two hinge pins 9 and the unlock lever 16 being hingedly connected; and The axes of the hinge hole 11 and the second hinge hole 18 are parallel to the axis of the bearing housing 15 to ensure that when the unlocking lever 16 is pulled down or pushed up, the two locking pins 9 move in a direction perpendicular to the axis of the bearing housing 15. A T-shaped unlocking head 17 is provided at the lower end of the unlocking lever 16 and is configured to cooperate with the ground changing device to achieve unlocking.

Further, as shown in Figs. 7-8, the lower end of the connection between the horizontal section 91 and the circular arc section 92 is provided with a circular arc mating surface 12, and the upper surface of the bottom plate 19 of the shaft box 3 is provided with two positionings respectively. A pin 20 is configured to realize the lateral positioning of the locking pin 9, and a positioning spring 20 is sleeved on the positioning pin 20. The supporting spring 22 is in a pre-compressed state to realize the safe locking of the locking pin 9. The supporting spring 22 The upper part is provided with a spring support seat, and a top of the spring support seat is provided with an arc fitting groove matching the arc fitting surface 12, and the locking pin 9 is rotatably rotatably through the arc fitting surface 12. It is supported in the arc matching groove to form a fulcrum to realize the rotation of the locking pin 9 relative to the spring support seat.

In the embodiment of the present application, as shown in FIG. 2-3, the shaft case 3 is further provided with a locking pin limiter 21 on the outside of the two positioning pins 20, and the locking pin 9 The arc segment 92 is configured to be supported and limited in the locking pin limit seat 21.

As shown in Figure 2-3, in addition, the bottom plate 19 of the shaft box 3 is provided with a through hole through which the unlocking lever 16 passes, and the shape and size of the through hole and the cross-sectional shape of the unlocking lever 16 The size and size are matched to ensure that the unlocking lever 16 can move up and down along the through hole without shaking.

Under the action of the two locking pins 9 and the unlocking lever 16 and the supporting spring 22 that are hinged, the locking pin 9 on the left rotates clockwise with the arc mating surface 12 that cooperates with the left spring support seat as the rotation center. The locking pin 9 on the right side rotates counterclockwise with the arc mating surface 12 matched with the spring support on the right side, so that the variable curvature arc locking pin 9 smoothly moves from the gauge change groove of the bearing housing 15 7 is released and unlocked, the lateral freedom of wheel 2 is released, and the wheel 2 is forced to move to the new gauge in the corresponding sliding centering rail. At this time, the bearing assembly press-fitted on the wheel 2 and the press-fitted bearing The bearing housing 15 on the outer ring moves laterally with the wheel 2 to accommodate the new gauge.

When the lateral movement of the wheel 2 reaches the new gauge, the unlocking lever 16 moves upward under the restoring force of the support spring 22, and the locking pin 9 on the left side is the arc mating surface 12 that cooperates with the left spring support seat as The rotation center rotates counterclockwise, and the locking pin 9 on the right rotates clockwise with the arc mating surface 12 that is matched with the spring support on the right side, so that the variable curvature arc locking pin 9 changes again with the gauge. The groove 7 is tightly fitted.

The vehicle continued to move forward, and the new wide-gauge steel rail was raised to make the load re-applied to wheel 2 to complete the entire process of gauge change. Wheel 2 started to move forward with the new gauge.

The reverse process of transitioning from a larger gauge track to a smaller gauge track is achieved in the same way.

The bearing assembly includes a bearing 14, a bearing retaining ring, and a sealing ring. The bearing retaining ring is respectively provided at both ends of the bearing 14, and the bearing retaining ring and the bearing are provided with the retaining ring respectively. A seal ring, and one end of the bearing assembly abuts against the annular positioning boss 6. In one embodiment, the sealing method of the seal ring is a curved path seal, which is also called a labyrinth seal. It is realized by setting a small gap like a labyrinth-a tortuous air path; the inner seal of the shaft box 3: the inner bearing of the bearing The ring is fixed on the mating surface of the wheel 2 of the wheel. The outer ring of the bearing is fixed on the bearing housing 15. A curved path seal is provided between the inner and outer ring of the bearing. Pure labyrinth seals are not provided with rubber seals. If the seal requirements are not met, a corresponding rubber seal may be provided in the gap.

As shown in FIG. 1, the bearing housing 15 is located on the outer end of the press-fitting working surface 4 and is provided with a limit stop 13 to ensure the limit between the bearing housing 15 and the shaft housing 3 and prevent the bearing housing 15 and the shaft housing. The body 3 is in direct hard contact, which protects the bearing housing 15 and the shaft case 3, and can also have a dustproof effect.

An embodiment of the present application further provides a variable gauge truck, which includes the variable gauge wheelset described above, so as to realize the variable gauge of the truck.

It can be seen from the above embodiments that the present application can reliably achieve locking and unlocking, thereby ensuring the convenient operation of the variable gauge wheelset, and the convenient and reliable implementation of the variable gauge of the train.

The embodiment of the present application also provides a locking mechanism for a variable gauge wheelset, as shown in FIG. 3-10. The locking mechanism includes a bearing housing 15 and a locking rod. The inner periphery of the bearing housing 15 is provided with An annular positioning boss 6 that divides the inner peripheral surface of the bearing housing 15 into a locking working surface 5 and a press-fitting working surface 4;

A set of gauge changing grooves 7 are provided on the radially opposite sides of the locking working surface 5, respectively. Each set of gauge changing grooves 7 includes a plurality of gauge changing grooves 7 arranged at intervals in the axial direction. In the example, each group of the gauge conversion grooves 7 includes two gauge conversion grooves 7, and the distance between the two gauge conversion grooves 7 is equal to half of the required gauge change, and the locking works The surface 5 is provided with a notch 8 penetrating from below the two gauge change grooves 7. In this embodiment, the locking working surface 5 is a three-quarter arc surface, and the notch 8 is a quarter. A circular arc surface; the locking lever includes two symmetrical locking pins 9 and an unlocking lever 16 articulated to the two locking pins 9, and the two locking pins 9 are respectively configured to be inserted into corresponding groups In the single gauge change groove 7, locking is realized, and the unlocking lever 16 extends from the gap 8 to the bearing housing 15, and can cause the locking pin 9 to leave the track where it is located under the action of external force. Distance changing slot 7 to achieve unlocking; the locking mechanism has a simple structure and can easily and reliably implement wheel 2 gauge change, which solves the problem of trains in different tracks On the issue of continuous operation of the track.

Further, the locking mechanism may further include a bearing assembly and an inner sleeve, the outer ring of the bearing assembly is press-fitted on the press-fitting working surface 4 of the bearing housing 15; the inner ring of the bearing assembly is press-fitted on On the outer periphery of the inner sleeve, the inner sleeve is configured to be fixedly connected to the outside of the hub of the wheel 2. In one embodiment, the inner sleeve is integrally formed with the hub of the wheel 2 to form an elongated hub. Specifically, The locking mechanism is installed on the axle 1 on the outside of the wheel 2 through an inner sleeve. An inner spline is provided on the inner periphery of the inner sleeve. Both ends of the axle 1 are respectively provided with outer splines that match the inner spline. Key, the wheel 2 and the axle 1 are connected to the outer spline through the inner spline, so that the torque is evenly distributed on the inner periphery of the wheel 2, which is not only convenient for transmitting torque, but also for the wheel 2 to slide along the axle 1 to achieve change gauge. In addition, the locking mechanism is provided on the outside of the wheel 2 so that the axle 1 on the inner part of the wheel 2 is consistent with the conventional axle 1. On the one hand, there is enough space for the motor, gear box and other components installed on the inner axle 1 of the wheel 2. The design space, on the other hand, can be consistent with the interface of the existing car, which is convenient for the mass transformation of existing cars; when the gauge change is needed, push the wheel 2 inward or outward to move the variable gauge distance to achieve the wheel 2 Gauge transformation.

In the embodiment of the present application, as shown in FIG. 1, the locking mechanism is located in the shaft case 3 at both ends of the axle 1, and the bearing housing 15 is clearance-fitted with the shaft case 3 to realize the bearing housing 15 relative to the shaft. The sliding of the box body 3, and the axial size of the shaft box body 3 is enlarged and a cavity is provided, and the cavity distance is half of the difference between different gauge changes; when locking, the locking pin 9 is inserted into the corresponding gauge changing groove In 7, the wheels 2, the bearing assembly, and the bearing housing 15 are kept relatively fixed with the axle box 3 as a whole to achieve locking; when the gauge is required to be changed, the unlocking lever 16 moves downward under the action of the external force to pull down, so that the lock The tightening pin 9 leaves the gauge changing groove 7 under the outward pulling force. At this time, an outward or inward thrust is applied to the wheel 2 so that the wheel 2, the bearing assembly, and the bearing housing 15 as a whole move inward or outward until When the other gauge change groove 7 is reached, the external force is cancelled, the unlocking lever 16 moves upward, and the locking pin 9 is inserted into the opposite gauge change groove 7 by the inward thrust to achieve locking, thereby completing the wheel gauge change gauge. Simple structure and easy operation.

Specifically, each of the locking pins 9 includes a horizontal section 91 and a concave arc section 92. One end of the horizontal section 91 is connected to a lower end of the arc section 92, and an upper end of the arc section 92 is provided. A locking surface 10 is matched with the gauge changing groove 7. The groove bottom of the gauge changing groove 7 has an arc surface consistent with the arc surface of the bearing housing 15. The locking surface 10 is The arc surface matches the arc surface; the other end of the horizontal section 91 is provided with a first hinge hole 11; the upper end of the unlocking lever 16 is provided with a second hinge hole 18, and passes through two of the first through a hinge shaft The hinge hole 11 and the second hinge hole 18 realize the two hinge pins 9 and the unlock lever 16 to be hingedly connected; and the axes of the first hinge hole 11 and the second hinge hole 18 are connected to the bearing. The axis of the casing 15 is parallel to ensure that when the unlocking lever 16 is pulled down or pushed up, the two locking pins 9 move in a direction perpendicular to the axis of the bearing casing 15. A T-shaped unlocking head 17 is provided at the lower end of the unlocking lever 16 to realize unlocking by cooperating with the ground changing device.

Further, the lower end of the connection between the horizontal section 91 and the circular arc section 92 is provided with a circular arc mating surface 12, and the upper surface of the bottom plate 19 of the shaft box 3 is respectively provided with two positioning pins 20, which are configured to realize a lock Tightening pin 9 is positioned laterally, a supporting spring is sleeved on the positioning pin 20, the supporting spring is in a pre-compressed state to achieve safe locking of the locking pin 9, and a spring support seat is sleeved on the supporting spring, the spring The top of the support base is provided with an arc-fitting groove matching the arc-fitting surface 12, and the locking pin 9 is rotatably supported in the arc-fitting groove through the arc-fitting surface 12 to form The fulcrum is used to realize the rotation of the locking pin 9 relative to the spring support seat.

In the embodiment of the present application, the shaft case 3 is further provided with a locking pin limiter 21 on the outside of the two positioning pins 20, and the arc segment 92 of the locking pin 9 is configured as Supported and limited in the locking pin limit seat 21.

In addition, the bottom plate 19 of the shaft box 3 is provided with a through hole through which the unlocking lever 16 passes. The shape and size of the through hole are matched with the sectional shape and size of the unlocking lever 16 to ensure the unlocking lever. 16 can move up and down along the through hole without shaking.

Under the action of the two hinge pins 9 and the unlocking lever 16 and the supporting spring, the locking pin 9 on the left rotates clockwise with the arc mating surface 12 that cooperates with the left spring support seat, The locking pin 9 on the right side rotates counterclockwise with the arc mating surface 12 matched with the right spring support seat, so that the variable curvature arc locking pin 9 smoothly moves from the track change groove 7 of the bearing housing 15 The center of the wheel 2 is released, and the lateral freedom of the wheel 2 is released. The wheel 2 is forced to move to a new gauge in the corresponding sliding centering rail. At this time, the bearing assembly press-fitted on the wheel 2 and press-fitted outside the bearing The bearing housing 15 on the ring moves laterally with the wheel 2 to accommodate the new gauge.

When the lateral movement of the wheel 2 reaches the new gauge, the unlocking lever 16 moves upward under the effect of the restoring force of the support spring, and the locking pin 9 on the left side rotates with the arc mating surface 12 that cooperates with the left spring support seat. The center rotates counterclockwise, and the locking pin 9 on the right rotates clockwise with the arc mating surface 12 which is matched with the right spring support seat, so that the variable curvature arc locking pin 9 and the gauge change groove are rotated again. 7 Tight fit.

The bearing housing 15 is located at the outer end of the press-fitting working surface 4 and is provided with a limiting retaining ring 13 so as to ensure the limit between the bearing housing 15 and the shaft housing 3 and prevent the bearing housing 15 from directly and rigidly contacting the shaft housing 3, The bearing housing 15 and the shaft case 3 are protected, and the dust-proof effect can also be achieved.

As shown in FIG. 1, the present application further provides a variable gauge wheelset, which includes the locking mechanism for the variable gauge wheelset described above, which can conveniently and reliably implement the variable gauge.

It can be seen from the above embodiments that the locking mechanism of the present application can reliably achieve locking and unlocking, thereby ensuring that the variable gauge wheel pair using the locking mechanism is convenient to operate and can conveniently and reliably implement the variable gauge of the train.

The embodiment of the present application also provides a shaft box structure for a variable gauge wheelset, as shown in FIG. 3, which includes a shaft box 3, and the shaft box 3 is provided with a channel 23 along its axial direction, as shown in FIG. As shown in FIG. 3-6, the channel 23 is configured to install a bearing housing 15 slidingly fitted with the bearing housing 15 and a locking rod configured to lock or unlock the bearing housing 15. The bearing housing 15 is movable in the channel 23. The distance is equal to half of the required variable gauge. The bottom of the shaft box 3 is provided with a matching hole that communicates with the channel 22. The inner periphery of the bearing housing 15 is provided with an annular positioning boss 6. The annular positioning protrusion The stage 6 divides the inner peripheral surface of the bearing jacket 15 into a locking working surface 5 and a press-fitting working surface 4;

A set of gauge changing grooves 7 are provided on the radially opposite sides of the locking working surface 5, respectively. Each set of gauge changing grooves 7 includes a plurality of gauge changing grooves 7 arranged at intervals in the axial direction. In the example, each group of the gauge conversion grooves 7 includes two gauge conversion grooves 7, and the distance between the two gauge conversion grooves 7 is equal to half of the required gauge change, and the locking works The surface 5 is provided with a notch 8 penetrating from below the two gauge change grooves 7. In this embodiment, the locking working surface 5 is a three-quarter arc surface, and the notch 8 is a quarter. Arc surface; as shown in FIGS. 3 and 7-10, the locking lever includes two symmetrically arranged locking pins 9 and an unlocking lever 16 hinged to both of the locking pins 9. 16 extends out of the bearing housing 15 from the notch 8 and passes through the fitting hole, and the two locking pins 9 are respectively configured to be inserted into a single set of the gauge change grooves 7 of the corresponding group to realize the The bearing housing 15 is locked relative to the shaft case 3, and one end of the unlocking lever 16 extending out of the shaft case 3 can make the locking pin 9 leave under the action of external force. Gauge changing groove 7 realizes that the bearing housing 15 is unlocked relative to the axle box 3; unlocking and locking are realized in the axle box 3, making full use of the space in the axle box 3, which can change the gauge The bearing jacket 15 and the locking lever in the mechanism provide matching installation space, provide protection for the wheelset variable gauge, and save external space for the bogie, making the overall structure compact.

Wherein, the locking pins 9 each include a horizontal section 91 and a concave arc section 92, one end of the horizontal section 91 is connected to the lower end of the arc section 92, and the upper end of the arc section 92 is provided with The locking surface 10 is matched with the gauge changing groove 7, and the groove bottom of the gauge changing groove 7 is an arc surface consistent with the arc surface of the bearing housing 15; the locking surface 10 is A curved surface matching the curved surface, the other end of the horizontal section 91 is provided with a first hinge hole 11; the upper end of the unlocking lever 16 is provided with a second hinge hole 18, and the hinge shaft passes through the first hinge hole 11 And the second hinge hole 18 to achieve the two hinge pins 9 and the unlock lever 16 to be articulatedly connected; the axes of the first hinge hole 11 and the second hinge hole 18 are parallel to the axis of the bearing housing 15 . In order to ensure that when the unlocking lever 16 is pulled down or pushed up, the two locking pins 9 move in a direction perpendicular to the axis of the bearing housing 15. A T-shaped unlocking head 17 is provided at the lower end of the unlocking lever 16 to realize unlocking by cooperating with the ground changing device.

The lower end of the connection between the horizontal section 91 and the circular arc section 92 is provided with a circular arc mating surface 12, and the upper surface of the bottom plate 19 of the shaft box 3 is provided with two positioning pins 20 respectively, which are configured to achieve locking The pin 9 is positioned laterally, and a support spring is sleeved on the positioning pin 20. A spring support seat is sleeved on the support spring, and a circle matching the arc mating surface 12 is provided on the top of the spring support seat. In the arc-fitting groove, the locking pin 9 is rotatably supported in the arc-fitting groove through the arc-fitting surface 12 to form a rotation fulcrum to realize the rotation of the locking pin 9 relative to the spring support seat.

Specifically, the spring support seat is provided with a sinker hole, a top surface of the sinker hole forms a limiting surface, the sinker hole is configured to be sleeved on the support spring, and an upper end of the support spring Abutment with the limiting surface; the lower end of the support spring abuts on the shaft box 3 on the outer periphery of the positioning pin 20, thereby facilitating the installation and positioning of the support spring, further, the natural nature of the support spring The length is greater than the height of the positioning pin 20 to ensure that the spring support seat has a distance that moves up and down, and the moved distance needs to be such that the locking pin 9 can be inserted into or leave the corresponding gauge change slot 7.

In addition, in order to prevent the lock pin 9 from swinging during the rotation, the shaft case 3 is further provided with lock pin limiters 21 on the outer sides of the two positioning pins 20, respectively. The arc segment 92 of 9 is configured to be supported and limited in the lock pin limit seat 21 to achieve a better limit of the lock pin 9 so that it can be accurately inserted into the corresponding gauge change slot 7 In addition, in order to achieve a better match between the two, a limiting slot is provided at the upper end of the locking pin limiter 21, and the opening width of the limiting slot matches the width of the arc segment 92.

The shape and size of the matching hole are adapted to the cross-sectional shape and size of the unlocking lever 16 to ensure that the unlocking lever 16 can move up and down along the matching hole without shaking.

Before changing the gauge, the load of the wheel 2 is borne by the axle box 3. In the process of the axle box 3 bearing the load of the wheel 2, the axle box 3 needs to contact the support rail provided on the ground and slide relative to the support rail to ensure that the train can continue to move forward when the gauge changes. By setting the support plate, when the train changes the gauge, the support plate supports the axle box 3 and slides relative to the support rail, thereby avoiding the axle box 3 from directly contacting and supporting the track and abrasion, and supporting The board is coated with a wear-resistant material, thereby extending the service life of the axle box 3.

As shown in FIG. 1, the present application also provides a variable gauge wheelset, which includes wheels 2 and axles 1 and the above-mentioned structure of the axle box 3, and the press-fitting working surface 4 of the bearing jacket 15 A bearing assembly and an inner sleeve are installed; the inner ring of the bearing assembly is press-fitted on the outer periphery of the inner sleeve; the inner sleeve is fixedly connected to the outside of the hub of the wheel 2; The axle box body is fitted with clearance. In one embodiment, the inner sleeve is integrally formed with the hub of the wheel 2 to form an elongated hub. Specifically, an inner spline is provided on the inner periphery of the inner sleeve, and two ends of the axle 1 are provided respectively. There is an external spline matching the internal spline, and the wheel 2 and the axle 1 are connected to the external spline through the internal spline, so that the torque is evenly distributed on the inner periphery of the wheel 2, which is convenient for transmission The torque is also convenient for the wheel 2 to slide along the axle 1 to achieve variable gauge. When locking, the locking pin 9 is inserted into the corresponding gauge change groove 7, so that the wheel 2, the bearing assembly and the bearing housing 15 as a whole remain relatively fixed with the axle housing 3 to achieve locking; when a gauge change is required, The unlocking lever 16 moves downwards under the action of the external force and the pull-down force, so that the locking pin 9 is subjected to an outward pulling force and leaves the gauge change groove 7. At this time, an outward or inward pushing force is applied to the wheel 2 so that the wheel 2 The bearing assembly and the bearing housing 15 move inward or outward as a whole until reaching the other gauge changing groove 7, the external force is cancelled, the unlocking lever 16 moves upward, and the locking pin 9 is inserted into the relative gauge change by the inward thrust. The groove 7 is locked to complete the change of gauge of the wheel 2 with a simple structure and convenient operation.

Specifically, the bearing assembly includes a bearing 14, a bearing retaining ring, and a seal ring. The bearing retaining ring is respectively provided at both ends of the bearing 14, and the bearing retaining ring and the two ends of the bearing 14 are respectively provided. The seal ring is provided, and one end of the bearing assembly abuts against the annular positioning boss 6. In one embodiment, the sealing method of the sealing ring is a curved path seal, which is also called a labyrinth seal. It is achieved by setting a small gap like a labyrinth-a tortuous air path; the inside of the shaft box 3 is sealed: inside the bearing 14 The retaining ring is fixed on the mating surface of the wheel 2 of the wheel. The outer retaining ring of the bearing 14 is fixed on the bearing housing 15. A curved path seal is provided between the inner and outer retaining rings of the bearing 14. The outer seal of the axle box: the inner retaining ring of the bearing 14 and the bearing outer sleeve 15 Winding road seal. Pure labyrinth seals are not provided with rubber seals. If the seal requirements are not met, a corresponding rubber seal may be provided in the gap.

Under the action of the two hinge pins 9 and the unlocking lever 16 and the supporting spring, the locking pin 9 on the left rotates clockwise with the arc mating surface 12 that cooperates with the left spring support seat, The locking pin 9 on the right side rotates counterclockwise with the arc mating surface 12 matched with the right spring support seat, so that the variable curvature arc locking pin 9 smoothly moves from the track change groove 7 of the bearing housing 15 The center of the wheel 2 is released, and the lateral freedom of the wheel 2 is released. The wheel 2 is forced to move to a new gauge in the corresponding sliding centering rail. At this time, the bearing assembly press-fitted on the wheel 2 and the bearing 14 are press-fitted. The bearing housing 15 on the outer ring moves laterally with the wheel 2 to accommodate the new gauge.

As can be seen from the above embodiments, the axle box structure design of the present application can be adapted to the installation and work of the variable gauge mechanism, and unlocking and locking are realized in the axle box body, making full use of the space in the axle box body, which is a wheel pair change The gauge provides protection, while saving external space for the bogie, making the overall structure compact.

The above are only the preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement, or improvement made within the spirit and principle of this application shall be included in this application. Within the scope of protection.

Claims

A variable gauge wheelset is characterized by comprising a wheel, an axle, and a locking mechanism. The wheel is provided at both ends of the axle and is splined to the axle. The outer side of the wheel hub of the wheel faces An extended connecting sleeve is formed to extend outward, and the locking mechanisms are respectively press-fitted on the connecting sleeves and are located in axle boxes at both ends of the axle; the locking mechanism is provided through the bottom of the axle box The locking lever can lock or unlock the locking mechanism under the action of external force, thereby locking or unlocking the wheel.
The variable gauge wheelset according to claim 1, wherein the locking mechanism is further provided with a bearing assembly and a bearing housing, and an inner ring of the bearing assembly is press-fitted on an outer periphery of the connection sleeve, and The outer ring of the bearing assembly is press-fitted on the inner periphery of the bearing casing, and the outer periphery of the bearing casing is clearance-fitted with the shaft case.
The variable gauge wheelset according to claim 2, wherein an annular positioning boss is provided on an inner periphery of the bearing housing, and the annular positioning boss separates an inner peripheral surface of the bearing housing into a press fit Working surface and locking working surface, the outer ring of the bearing assembly is press-fitted on the press-fitting working surface;

A set of gauge changing grooves are provided on the radially opposite sides of the locking working surface, each set of gauge changing grooves includes a plurality of gauge changing grooves spaced along the axial direction, and the locking working surface A through gap is opened from below the two sets of gauge changing grooves, the locking lever includes two symmetrical locking pins and an unlocking lever hinged to the two locking pins, and two locking The pins are respectively configured to be inserted into a single of the gauge change grooves of a corresponding group to achieve wheel locking, and the unlocking lever extends from the notch to the bearing jacket and the shaft case, and can be under the action of an external force. The lock pin is separated from the gauge changing groove where the lock pin is located to realize wheel unlocking.
The variable gauge wheelset according to claim 3, wherein the locking pins each include a horizontal section and a concave circular arc section, and one end of the horizontal section is connected to a lower end of the circular arc section, The upper end of the arc segment is provided with a locking surface matching the gauge change slot, the other end of the horizontal segment is provided with a first hinge hole; the upper end of the unlocking lever is provided with a second hinge hole, Through the hinge shaft passing through the first hinge hole and the second hinge hole, two lock pins are hingedly connected to the unlock lever; the axes of the first hinge hole and the second hinge hole are both connected to the axis. The axis of the bearing housing is parallel.
The variable gauge wheelset according to claim 3, wherein a T-type unlocking head is provided at the lower end of the unlocking lever.
The variable gauge wheelset according to claim 4, wherein the lower end of the connection between the horizontal section and the circular arc section is provided with a circular arc mating surface, and the upper surface of the bottom plate of the shaft box body is provided with two A positioning pin on which a support spring is sleeved, and a spring support seat is sleeved on the support spring, and an arc matching groove matching the arc mating surface is provided on the top of the spring support seat; The locking pin is rotatably supported in the arc-fitting groove through the arc-fitting surface.
The variable gauge wheelset according to claim 6, wherein a lock pin limiter is further provided on the outside of the two positioning pins in the shaft box body, and the circle of the lock pin is round. The arc segment is configured to be supported and limited in the locking pin limit seat.
The variable gauge wheelset according to claim 3, wherein the bottom plate of the axle box body is provided with a through hole through which the unlocking lever passes, and the shape and size of the through hole and the unlocking lever The shape and size of the cross section match.
The variable gauge wheelset according to claim 3, wherein the locking working surface is a three-quarter arc surface, and the notch is a quarter arc surface;

The bearing assembly includes a bearing, a bearing retaining ring and a sealing ring. The bearing retaining ring is provided at both ends of the bearing, and the sealing ring is provided between the bearing retaining ring and the two ends of the bearing. And one end of the bearing assembly abuts against the annular positioning boss.
The variable gauge wheelset according to claim 4, characterized in that each set of gauge change slots includes two gauge change slots, and a distance between the two gauge change slots is equal to a desired change The half of the gauge; the groove bottom of the gauge changing groove has an arc surface consistent with the arc surface of the bearing housing; and the locking surface has an arc surface matching the arc surface.
A variable gauge bogie, comprising a variable gauge wheelset according to any one of claims 1-10.
A locking mechanism for a variable gauge wheel pair is characterized in that the locking mechanism includes a bearing jacket and a locking rod, and an inner positioning boss is provided on the inner periphery of the bearing jacket. The inner peripheral surface of the bearing housing is divided into a locking working surface and a press-fitting working surface;

A set of gauge changing grooves are provided on the radially opposite sides of the locking working surface, each set of gauge changing grooves includes a plurality of gauge changing grooves spaced along the axial direction, and the locking working surface A through gap is opened from below the two sets of gauge changing grooves, the locking lever includes two symmetrical locking pins and an unlocking lever hinged to the two locking pins, and two locking The pins are respectively configured to be inserted into a corresponding one of the gauge change grooves of the corresponding group to achieve locking, and the unlocking lever extends out of the bearing housing from the gap, and can cause the locking pin to leave under an external force. The gauge change slot is located to unlock it.
The locking mechanism for a variable gauge wheelset according to claim 12, further comprising a bearing assembly and an inner sleeve, and an outer ring of the bearing assembly is press-fitted to the press-fitting work of the bearing housing. The inner ring of the bearing assembly is press-fitted on the outer periphery of the inner sleeve, and the inner sleeve is configured to be fixedly connected to the outside of the hub of the wheel.
The locking mechanism for a variable gauge wheelset according to claim 13, wherein the locking mechanism is mounted on the axle outside the wheel through the inner sleeve, and is located in the axle box at both ends of the axle; The bearing housing is clearance-fitted with the shaft case.
The locking mechanism for a variable gauge wheelset according to claim 14, wherein the locking pins each include a horizontal section and a concave circular arc section, and one end of the horizontal section and the circular arc section The upper end of the arc segment is provided with a locking surface matching the gauge change groove, and the other end of the horizontal segment is provided with a first hinge hole; the upper end of the unlocking lever is provided with a first Two hinged holes, through which the first hinged hole and the second hinged hole pass through the hinged shaft, to realize the hinged connection between the two locking pins and the unlocking lever; the axes of the first and second hinged holes They are all parallel to the axis of the bearing housing.
The locking mechanism for a variable gauge wheel pair according to claim 14, wherein a lower end of the unlocking lever is provided with a T-shaped unlocking head.
The locking mechanism for a variable gauge wheelset according to claim 14, characterized in that the lower end of the connection between the horizontal section and the circular arc section is provided with a circular arc mating surface, and the upper surface of the bottom plate of the shaft box body is respectively Two positioning pins are provided, a supporting spring is sleeved on the positioning pin, a spring supporting seat is sleeved on the supporting spring, and an arc matching the arc matching surface is provided on the top of the spring supporting seat. In the fitting groove, the locking pin is rotatably supported in the arc fitting groove through the arc fitting surface.
The locking mechanism for a variable gauge wheel pair according to claim 17, wherein a lock pin limiter is further provided on the outside of the two positioning pins in the shaft box, and the lock The arc segment of the tightening pin is configured to be supported and limited in the locking pin limit seat.
The locking mechanism for a variable gauge wheelset according to claim 17, wherein the bottom plate of the axle box body is provided with a through hole through which the unlocking lever passes, and the shape, size and The cross-sectional shape and size of the unlocking lever match.
The locking mechanism for a variable gauge wheelset according to claim 15, wherein each set of gauge changing grooves includes two gauge changing grooves, and a distance between the two gauge changing grooves It is equal to half of the required variable gauge; the groove bottom of the gauge change groove has an arc surface consistent with the arc surface of the bearing housing; and the locking surface has an arc surface matching the arc surface.
The locking mechanism for a variable gauge wheelset according to claim 13, wherein the locking working surface is a three-quarter arc surface, and the notch is a quarter arc surface;

The bearing assembly includes a bearing, a bearing retaining ring and a sealing ring. The bearing retaining ring is provided at both ends of the bearing, and the sealing ring is provided between the bearing retaining ring and the two ends of the bearing. And one end of the bearing assembly abuts against the annular positioning boss.
A shaft box structure for a variable gauge wheel pair is characterized in that it includes a shaft box body which is provided with a channel along its axial direction, and the channel is configured to install a bearing jacket slidingly matched with the shaft box body and A locking lever configured to lock or unlock the bearing housing, a bottom of the shaft housing is provided with a matching hole that communicates with the channel, an inner periphery of the bearing housing is provided with an annular positioning boss, and the annular The positioning boss separates the inner peripheral surface of the bearing housing into a locking working surface and a press-fitting working surface;

A set of gauge changing grooves are provided on the radially opposite sides of the locking working surface, each set of gauge changing grooves includes a plurality of gauge changing grooves spaced along the axial direction, and the locking working surface A through gap is opened from below the two sets of gauge changing grooves, and the locking lever includes two locking pins and an unlocking lever hinged to the two locking pins, and the unlocking lever is from the gap The bearing housing extends out and passes through the fitting hole, and the two locking pins are respectively configured to be inserted into a single set of gauge change grooves of a corresponding group, so as to realize the bearing housing relative to the axle box body. Locking, one end of the unlocking lever extending out of the axle box body can cause the locking pin to leave the gauge change groove where it is located under the action of external force, so as to unlock the bearing housing relative to the axle box body.
The axle box structure for a variable gauge wheelset according to claim 22, wherein the locking pins each include a horizontal section and a concave circular arc section, and one end of the horizontal section is in contact with the circular arc. The lower end of the segment is connected, the upper end of the arc segment is provided with a locking surface matching the gauge change groove, and the other end of the horizontal segment is provided with a first hinge hole; the upper end of the unlocking lever is provided with The second hinge hole passes through the first hinge hole and the second hinge hole through a hinge shaft to realize the hinge connection between the two locking pins and the unlock lever; the first hinge hole and the second hinge hole The axes are all parallel to the axis of the bearing housing.
The axle box structure for a variable gauge wheelset according to claim 23, wherein a lower surface of the connection between the horizontal section and the arc section is provided with an arc matching surface, and an upper surface of a bottom plate of the axle box Two positioning pins are respectively provided, a support spring is sleeved on the positioning pin, a spring support seat is sleeved on the support spring, and a circle matching the arc mating surface is provided on the top of the spring support seat. An arc-fitting groove, and the locking pin is rotatably supported in the arc-fitting groove through the arc-fitting surface.
The axle box structure for a variable gauge wheelset according to claim 24, wherein the spring support seat is provided with a sinking hole, and a top surface of the sinking hole forms a limiting surface, and the sinking The hole is configured to be sleeved on the support spring, and an upper end of the support spring is in contact with the limiting surface; a lower end of the support spring is in contact with the shaft box on the outer periphery of the positioning pin.
The axle box structure for a variable gauge wheelset according to claim 24, wherein the axle box is further provided with locking pin limiters on the outer sides of the two positioning pins, and The arc segment of the lock pin is configured to be supported and limited in the lock pin limit seat.
The axle box structure for a variable gauge wheelset according to claim 26, wherein the natural length of the support spring is greater than the height of the positioning pin.
The axle box structure for a variable gauge wheelset according to claim 27, wherein a limiting groove is provided on the upper end of the locking pin limiter, and an opening width of the limiting groove is equal to the arc The widths of the segments match.
The axle box structure for a variable gauge wheelset according to claim 23, wherein a shape and a size of the fitting hole are adapted to a sectional shape and a size of the unlocking lever.
The axle box structure for a variable gauge wheelset according to claim 22, wherein a support plate is provided at the bottom of the axle box, and the support plate is coated with a wear-resistant material.
The axle box structure for a variable gauge wheelset according to claim 23, wherein each group of the gauge conversion grooves includes two gauge conversion grooves, and a distance between the two gauge conversion grooves is The distance is equal to half of the required variable gauge; the groove bottom of the gauge changing groove is an arc surface consistent with the arc surface of the bearing housing; and the locking surface is an arc surface matching the arc surface.