CN111137318A

CN111137318A - Locking device of variable-gauge bogie

Info

Publication number: CN111137318A
Application number: CN202010008262.8A
Authority: CN
Inventors: 朱向阳; 陈喜红; 李冠军; 祝贺
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2019-11-12
Filing date: 2020-01-06
Publication date: 2020-05-12
Anticipated expiration: 2040-01-06
Also published as: CN111137318B

Abstract

The invention discloses a locking device of a track-distance-variable bogie, which comprises a supporting cylinder, a plurality of locking units, a plurality of positioning blocks and a rolling ring, wherein the supporting cylinder is sleeved outside an axle; the locking unit and the positioning block are mutually separated, and the rolling ring is connected with the locking unit; the locking unit is in a locking state when the bogie normally operates, and is in an unlocking state when the bogie changes the track gauge. Only 1 set of locking device of the invention is needed to be arranged in the middle of the wheel pair, and the left wheel and the right wheel can be unlocked/locked simultaneously.

Description

Locking device of variable-gauge bogie

Technical Field

The invention relates to a locking device of a variable-track-pitch bogie, belonging to the field of variable-track-pitch railway vehicles.

Background

At present, the rail gauges of different countries and regions in the world are different, and even in some countries and regions, a plurality of rail gauges coexist. When the same train needs to operate in a cross-track mode on railway lines with different track gauges, at present, three processing modes exist: the first is transfer, i.e. transferring containers/passengers from one gauge train to another; the second is to change the bogie, namely, the bogie with one track gauge is changed into the bogie with the other track gauge; the third is the use of a variable gauge bogie, i.e. the change of bogie wheelset to accommodate different gauges. The former two modes have low efficiency, long operation period and high cost; the third method is vice versa. Therefore, several countries in the world (e.g., Spain, Japan) have conducted decades of research into variable-track bogies and have achieved a series of results.

The core requirement of the variable-gauge bogie is that the wheels can be axially and accurately moved to a preset position and can be reliably locked after the movement is completed. In accordance with the practical requirements, the current technology is limited to change between two track gauges, namely, a certain track gauge-changing bogie can only be suitable for two track gauges.

The company Talgo, spain, pioneers the rail transfer technology and applies it to articulated pendulum trains. The technology uses a four-connecting-rod hanging structure of independently rotating wheels, wheel disc braking and braking clamps, and is not suitable for high speed. The locking devices are positioned on two sides of the wheels (4 sets of locking devices are arranged on each wheel pair), the outer ring of the axle box bearing is locked by the T-shaped rod, and the axle box bearing and the wheels are axially fixed relatively. When the T-shaped rod passes through the ground device, the ground unlocking rail pulls the T-shaped rod away, so that the axle box bearing is unlocked, the axle box bearing moves to a new position along with the wheel under the action of the ground guide rail, then the ground unlocking rail pushes the T-shaped rod to a locking position, the axle box bearing is locked again, and rail changing is completed. The left wheel and the right wheel simultaneously change rails; in the process of axial movement of the wheels, the axle boxes bear the load, and the wheels are free.

The spanish CAF corporation also subsequently developed a BrAVA variable gauge bogie using an integral wheel set configuration with the axle not rotating and the axle disk braking. The locking device is located the wheel outside (each wheel is to being equipped with 2 sets of locking device), establishes the slip axle sleeve between axletree and the axle box, and the wheel passes through the bearing and supports on the slip axle sleeve, and slip axle sleeve and axle box pass through bolt, taper pin locking, rely on the shaft dead weight unblock. When the wheel pair passes through the ground device, the ground supporting rail drives the locking device to unlock the axle box bearing, then the axle box bearing moves to a new position along with the wheel under the action of the ground guide rail, then the wheel pair is separated from the supporting rail, the axle box bearing is automatically locked again, and rail changing is completed. The left wheel and the right wheel simultaneously change rails; in the process of axial movement of the wheels, the axle boxes bear the load, and the wheels are free.

A-type and B-type variable-gauge bogies have been developed in Japan. The A-type track gauge-variable bogie adopts a hub motor and an independent rotating wheel structure, and is not suitable for high speed. The locking device is positioned at the outer side of the wheel, a sliding shaft sleeve is arranged between the axle and the axle box, the wheel is supported on the sliding shaft sleeve through a bearing, and the sliding shaft sleeve and the axle box are locked through a taper pin (similar to a BrAVA track-pitch bogie). The B-type variable gauge bogie adopts a traditional wheel pair structure, torque is transmitted through a roller spline, and a servo mechanism is arranged on a clamp for wheel disc braking. The locking device is positioned on the outer side of the wheel (2 sets of locking devices are arranged on each wheel pair), and is unlocked and locked by matching the connecting rod mechanism with the ground device. The principle of track change is basically the same as that of the BrAVA track-variable bogie.

A SUW2000 track-distance-variable wheel set is developed by Poland, an integral wheel set structure is adopted, and a shaft disc is used for braking, so that the purpose of non-unloading track change can be realized, but power cannot be provided. The spring pressing disc type locking device is positioned on the inner side of the wheel (each wheel pair is provided with 2 sets of locking devices). When the vehicle passes through the ground device, the ground unlocking rail on one side drives the corresponding locking device to unlock the wheel, then the wheel is moved to a new position under the action of the ground guide rail, then the wheel is separated from the unlocking rail, the wheel is automatically locked again, and the wheel on the side is changed in rail. The other side wheel is then finished with the transfer in the same way. The left wheel and the right wheel are successively changed into rails; and in the axial movement process of the wheel, the wheel still bears the load.

The German DB AG/Rafil V track-variable wheel pair has the structural principle basically consistent with SUW2000, and only the internal structure of the locking device is different.

In recent years, domestic research and manufacturing institutions have also begun to relate to rail transfer technology, but have not dropped over the above-mentioned foreign technologies, such as certain domestic gauge trucks. The track-distance-variable bogie comprises an axle assembly, a sliding key assembly and an axle box assembly, wherein wheels and axle box bearings are fixedly mounted on an integrated mounting seat, and the integrated mounting seat can axially slide relative to the axle. The structure and the working principle are similar to those of a Japanese B-type variable-gauge bogie. The axle box bodies at the two ends of the wheel pair are internally provided with sliding key assemblies, and the ground device triggers the sliding key assemblies to unlock/lock the integrated mounting seat, so that the wheels are controlled to move and lock.

The track changing action of the track gauge changing bogie needs to be completed on a specially-made ground track gauge changing device. As shown in fig. 27, the ground track gauge changing device is installed at the intersection of two different track gauges, and both ends of the ground track gauge changing device are respectively butted with the service line in a non-contact way (gap way). The ground track gauge changing device generally comprises a supporting rail, an unlocking rail, a guide rail and an abutting rail. The bogie enters/exits the ground track gauge conversion device through the butt joint track; the support rail is arranged at the axle box and used for supporting the weight of the bogie through the axle box so as to unload the wheels; the unlocking rail triggers the locking device to unlock/lock the locking device; the guide rail is used for enabling the wheel to move to the appointed position axially, and the track gauge is changed.

Chinese patent application "a locking element for variable gauge bogie (cn201821277229. x)" describes a locking element for variable gauge bogie, mainly characterized in that: the retaining member includes the bogie body, shaft and wheel, still include the axle sleeve, the axle sleeve passes through spline connection sliding connection at the epaxial of wheel, the shaft is fixed on the bogie body, the wheel passes through the bearing dead axle and rotates to be connected on the axle sleeve, the axle sleeve is located the inboard one end of track and passes through reset spring connection bogie body, the axle sleeve is located the coaxial backplate that is fixed with of one end in the track outside, be provided with locking mechanism on the backplate, locking mechanism includes two structures the same and connects the hoop arm on the backplate, the ball of scarf joint on the axle sleeve and lift the pole.

The Chinese patent application 'a locking mechanism and a variable-gauge wheel pair (CN 201810732191.9) for the variable-gauge wheel pair' describes a locking mechanism and a variable-gauge wheel pair for the variable-gauge wheel pair, which comprise a bearing outer sleeve and a locking rod, wherein the inner periphery of the bearing outer sleeve is provided with a locking working surface; the locking working surface is provided with a plurality of inner annular grooves at intervals along the axial direction and sliding grooves axially penetrating through the inner annular grooves, the locking rod comprises a locking head and an unlocking head, and the locking head is clamped into the inner annular grooves to realize locking; the unlocking head extends out of the sliding groove and can enable the locking head to leave the inner annular groove under the action of external force, so that unlocking is achieved.

Chinese patent application "locking mechanism (CN 201310137008.8) for becoming gauge bogie" describes a locking mechanism for becoming gauge bogie, and this locking mechanism includes the axletree, installs the wheel on the axletree, install the locating part on the axletree, the locating part is connected with the axletree relative rotation, install the locking device who restricts the wheel along axletree axial displacement on the locating part, be connected with the formula of triggering unlocking device on the locking device, the formula of triggering unlocking device utilizes the gauge-changing ground device to trigger the unblock.

Chinese patent application "a track-variable wheel set and its locking mechanism (CN 201611142943.3)" describes a track-variable wheel set and its locking mechanism, which is disposed between the wheel hub and the axle for locking the wheel at different positions of the axle; the axle is provided with a guide structure for guiding the wheels to move axially; the locking mechanism includes: the fixed sleeve is sleeved on the axle, the fixed sleeve is sleeved on the relieving sleeve, the reset element is arranged between the fixed sleeve and the relieving sleeve, the fixed sleeve is provided with a radial through hole, the radial through hole is provided with a limiting ball, the inner wall surface of the relieving sleeve is provided with an upper groove, and the outer wall surface of the wheel hub is provided with at least two lower grooves with different axial positions. When the wheel moves axially, the upper groove on the release sleeve is matched with the lower grooves at different positions to enable the limiting ball balls to lock the wheel at different positions.

The chinese patent application "a variable gauge wheel set (CN 201810333761.7)" describes a variable gauge wheel set comprising a wheel, an axle and a locking mechanism; the wheels are arranged at two ends of the axle and connected with the axle through splines; the locking mechanisms are respectively arranged on the outer sides of the wheels and are positioned in the axle box bodies at two ends of the axle, and the locking mechanisms are connected with the wheels and used for locking and unlocking the wheels. Locking mechanism includes outer sleeve, fitting pin, inner skleeve and antifriction bearing, and inner skleeve, antifriction bearing, outer sleeve closely cup joint from inside to outside in proper order, inner skleeve and axletree clearance fit, and outer sleeve axial boss sets up the recess, and axle box inner wall sets up the concave cambered surface, the fitting pin is used for inserting recess and concave cambered surface realize locking.

The Chinese patent application 'a locking mechanism for a variable-gauge wheel pair and a variable-gauge wheel pair (CN 201810730392.5)' describes a locking mechanism for a variable-gauge wheel pair and a variable-gauge wheel pair. The main characteristics are that: locking mechanism includes bearing housing, check lock lever, bearing assembly, inner skleeve, and the inner skleeve is installed on the axletree in the wheel outside and is arranged in the axle box body, and inner skleeve, bearing assembly, bearing housing closely cup joint from inside to outside in proper order, and the interior week of bearing housing is equipped with the location boss, the bearing housing outside is equipped with the gauge transform groove, the check lock lever inserts the transform groove that corresponds and realizes locking.

Disclosure of Invention

In the prior art, 2 or 4 sets of locking devices are required to be arranged on the wheel pair, and the left wheel and the right wheel are respectively locked/unlocked by 1 or 2 sets of locking devices, so that the structure is complicated.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a locking device of roll over bogie, its structural feature is: the locking device is used for locking the driving wheel assembly and the driven wheel assembly to an axle or unlocking the driving wheel assembly and the driven wheel assembly from the axle; the locking device comprises a supporting cylinder sleeved outside the axle, a plurality of locking units and a plurality of positioning blocks which are circumferentially arranged in the supporting cylinder, and a rolling ring arranged outside the supporting cylinder; the locking unit and the positioning block are mutually separated, and the rolling ring is connected with the locking unit; the locking unit is in a locking state when the bogie normally operates, and is in an unlocking state when the bogie changes the track gauge.

Therefore, after unlocking, when the driving wheel assembly and the driven wheel assembly move in place axially, the unlocking rail gradually narrows along with the continuous advance of the bogie, the two rolling rings are closed towards the middle under the action of restoring force of the spring, the rolling rings drive the control blocks of the locking units connected together to move axially towards the middle, meanwhile, the pin shaft moves radially inwards while moving axially towards the middle, the locking blocks of the locking units connected together are driven to move radially inwards, and therefore the locking device enters a locking position to be locked, and the driving wheel assembly and the driven wheel assembly are in a locking state.

According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:

preferably, the driving wheel assembly of the invention comprises a driving wheel and a driving shaft sleeve; the driven wheel assembly comprises a driven shaft sleeve and a driven wheel; the driving shaft sleeve and the driven shaft sleeve are in cross fit, and a locking device is arranged at the fit position of the driving shaft sleeve and the driven shaft sleeve; the active wheel and the axle are matched to have two states: the driving wheel can axially slide relative to the axle during unlocking, and driving torque can be transmitted between the driving wheel and the axle during locking; the driven wheel and the axle are matched to have two states: the driven wheel can axially slide relative to the axle when unlocked, and the driving torque can be transmitted between the driven wheel and the axle when locked.

For the invention, the locking unit comprises a control block, a locking block arranged on the control block, a support rod and a spring arranged in the control block, and a pin shaft arranged on the locking block; the axial movement of the control block can be converted into the radial movement of the locking block so as to realize the locking and unlocking of the locking device.

Preferably, the support rod is fixedly arranged in a front cover support rod hole or a rear cover support rod hole on the support cylinder and is used for supporting the spring; the spring is arranged on the supporting rod and is positioned in the spring mounting hole of the control block and used for providing restoring force and locking force for the locking device; preferably, the spring is a cylindrical helical compression steel spring.

In order to better realize the locking state of the locking block, the control block is provided with a rolling ring mounting part, a spring mounting hole, two control block inclined planes, two Z-shaped grooves, two control block positioning tables and two control block side positioning surfaces; the rolling ring mounting part is used for being connected with a rolling ring; the spring mounting hole is used for accommodating a spring; the inclined plane of the control block is matched with the inclined plane of the locking block to keep or release the locking state of the locking block.

Preferably, the Z-shaped groove is used for limiting the moving path of the pin shaft; the lower part of the control block positioning table is in contact with the inner hole of the cylinder body of the supporting cylinder body and is used for radially positioning the control block; the upper part of the control block positioning table is in contact with the bottom edge positioning surface of the positioning block and is used for limiting the control block to only slide axially; the side positioning surface of the control block is in contact with the inner side positioning surface of the locking block and is used for limiting the rotation of the locking block; the pin shaft is fixedly arranged in the pin hole of the locking block, extends into the Z-shaped groove of the control block and is used for controlling the relative movement of the locking block and the control block; preferably, the lower part of the control block positioning table is an arc surface, and the upper part of the control block positioning table is a plane.

Preferably, the locking blocks are provided with two pin holes, two locking block outer side positioning surfaces, two locking block locking notches, two locking block end surfaces, two locking block inner side positioning surfaces and two locking block inclined surfaces; the pin holes are used for fixedly mounting pin shafts; one of the two locking block locking notches is used for fixing the locking block on the gear hub locking boss, and the other locking notch is used for locking the axle locking boss, the driving shaft sleeve locking boss and the driven shaft sleeve locking boss into a whole; the locking block outer side positioning surface, the locking block inner side positioning surface and the locking block end surface limit the installation position and the movement direction of the locking block together; the locking block inclined plane is matched with the control block inclined plane and used for keeping or releasing the locking block in a locking state.

Preferably, the positioning block is provided with two positioning block side positioning surfaces, a positioning block circular arc surface, four positioning block groove positioning surfaces and two bottom edge positioning surfaces; the arc surface of the positioning block is fixedly arranged on the inner hole of the cylinder body of the supporting cylinder.

Preferably, the supporting cylinder comprises a supporting cylinder body, a supporting cylinder front cover arranged at the front end of the supporting cylinder body, and a supporting cylinder rear cover arranged at the rear end of the supporting cylinder body; the supporting cylinder front cover, the supporting cylinder body and the supporting cylinder rear cover are connected to form a hollow cavity for installing the locking unit and the positioning block; the front cover of the supporting cylinder is provided with a front cover mounting hole which is used for matching with a gear hub supporting surface of the gear hub to support the locking device on the gear hub; the supporting cylinder body is provided with a cylinder body inner hole and six cylinder body notches; the inner hole of the cylinder body is used for fixing the positioning block and radially positioning the control block; the barrel notch is used for providing installation and axial movement space for the rolling ring installation part of the control block.

Preferably, the rolling ring is provided with a rolling ring extrusion surface and three rolling ring installation grooves; and the rolling ring mounting groove is used for mounting a rolling ring mounting part on the control block.

The axle assembly of the track-variable bogie comprises an axle, a driving wheel assembly and a driven wheel assembly, wherein the driving wheel assembly and the driven wheel assembly are arranged on the axle; the driving wheel assembly comprises a driving wheel and a driving shaft sleeve; the driven wheel assembly comprises a driven shaft sleeve and a driven wheel;

preferably, the driving shaft sleeve and the driven shaft sleeve are in cross fit, and a locking device is arranged at the matching position of the driving shaft sleeve and the driven shaft sleeve; the active wheel and the axle are matched to have two states: the driving wheel can axially slide relative to the axle during unlocking, and driving torque can be transmitted between the driving wheel and the axle during locking; the driven wheel and the axle are matched to have two states: the driven wheel can axially slide relative to the axle when unlocked, and the driving torque can be transmitted between the driven wheel and the axle when locked.

Thus, when a change of gauge is required, the wheel axle is unlocked and the wheel is axially movable relative to the axle. After the track gauge is changed, the wheel shaft is locked by the locking device, and the wheel cannot axially move relative to the axle.

The wheel shaft of the present invention is assembled into a combined structure which can be fixed and can slide. When the track gauge is changed, the wheel shaft is unlocked, and the wheels can axially move relative to the axle; after the track gauge is changed, the wheel shaft is locked, and the wheel cannot axially move relative to the axle.

In order to better transmit torque (during locking) and move axially (during unlocking), both ends of the axle are provided with an axle extension and an axle spline, and the middle part of the axle is provided with an axle locking boss; the shaft extension is used for installing a shaft box bearing to support the shaft box; the axle spline is respectively matched with the driving wheel and the driven wheel; the axle locking boss is used for fixing the driving wheel assembly and the driven wheel assembly through the locking device.

Preferably, a driving wheel spline is arranged in the hole of the driving wheel, and a circle of driving wheel bump is arranged on the end surface of the inner side of the driving wheel; the driving wheel spline is matched with an axle spline on an axle; the driving wheel lug is matched with a driving shaft sleeve lug arranged at the end part of the driving shaft sleeve; and a driven wheel spline is arranged in the hole of the driven wheel and is matched with an axle spline on an axle.

In one preferred embodiment, a driving shaft sleeve bump matched with a driving wheel is arranged at the first end part of the driving shaft sleeve, a driving shaft sleeve locking boss is arranged on the outer surface of the second end part, and a driving shaft sleeve notch is formed in the second end part; the driving shaft sleeve and the driven shaft sleeve are in cross fit through a driving shaft sleeve notch; the driving shaft sleeve locking boss is used for fixing the driving wheel assembly on an axle; and a driving shaft sleeve spline is arranged on the outer diameter of the middle part of the driving shaft sleeve and is used for being matched with a gear hub spline inside a gear hub arranged on the driving shaft sleeve.

In order to facilitate the cross matching of the driving shaft sleeve and the driven shaft sleeve, a plurality of notches of the driving shaft sleeve are arranged along the length direction of the driving shaft sleeve; the driving shaft sleeve convex block is arranged along the circumferential direction of the driving shaft sleeve and is integrally V-shaped.

In one preferred embodiment, the first end part of the driven shaft sleeve is matched with a driven wheel, the outer surface of the second end part is provided with a driven shaft sleeve locking boss, and the second end part is provided with a driven shaft sleeve notch; the driven shaft sleeve and the driving shaft sleeve are in cross fit through a driven shaft sleeve notch; the driven shaft sleeve locking boss is used for fixing the driven wheel assembly on the axle.

In order to facilitate the cross matching of the driving shaft sleeve and the driven shaft sleeve, a plurality of driven shaft sleeve notches are formed and are arranged along the length direction of the driven shaft sleeve; the driven shaft sleeve locking boss is arranged along the circumferential direction of the driven shaft sleeve and is integrally V-shaped.

Compared with the prior art, the invention has the beneficial effects that: the locking device is arranged in the middle of the track-distance-variable wheel pair, only one wheel pair is needed for each wheel pair, the left wheel and the right wheel can be unlocked/locked simultaneously, and the track-distance-variable wheel pair locking device is convenient to operate and reliable in performance.

Drawings

FIG. 1 is a schematic view of a variable gauge wheel pair of the present invention;

FIG. 2 is a schematic view of an axle housing of the present invention;

FIG. 3 is a schematic view of the axle assembly of the present invention;

FIG. 4 is a schematic illustration of the active wheel assembly of the present invention;

FIG. 5 is a schematic view of the active wheel of the present invention;

FIG. 6 is a schematic view of the active bushing of the present invention;

FIG. 7 is a schematic view of the axle of the present invention;

FIG. 8 is a schematic representation of the driven wheel assembly of the present invention;

FIG. 9 is a schematic view of the driven shaft sleeve of the present invention;

FIG. 10 is a schematic view of the driven wheel of the present invention;

FIG. 11 is a schematic view of a gear hub of the present invention;

FIG. 12 is a schematic view of the locking device of the present invention;

FIG. 13 is a schematic view of the locking unit of the present invention;

FIG. 14 is a schematic diagram of a control block of the present invention;

FIG. 15 is a schematic view of the locking block of the present invention; wherein a) is a front view and b) is another side view;

FIG. 16 is a schematic view of a locating block of the present invention;

FIG. 17 is a schematic view of the positioning block to locking unit definition of the present invention;

FIG. 18 is a schematic view of a support cylinder of the present invention;

FIG. 19 is a schematic view of the rolling ring of the present invention;

FIG. 20 is an unlocking schematic of the locking device of the present invention;

FIG. 21 is a locking schematic of the locking device of the present invention;

FIG. 22 is a locking schematic of the axle of the present invention;

FIG. 23 is a schematic view of the ground gage change assembly of the present invention;

FIG. 24 is a schematic view of a carrier/stopper strip of the present invention;

FIG. 25 is a functional block diagram of the ground gage change device of the present invention;

FIG. 26 is a cross-sectional view of the track-changing wheelset of the present invention entering the ground track-changing unit;

fig. 27 is a schematic view of a conventional ground gauge changing apparatus.

In the figure

A-axle boxes; b, assembling the wheel shaft; a C-gear hub; d-a locking device; g-ground track gauge changing device; a1-axle box transverse limiting surface; a2-axle box vertical bearing surface; b1-active wheel composition; b2-axle; b3-driven wheel; b11 — active wheels; b12-driving shaft sleeve; b111 — active wheel lugs; b112 — drive wheel splines; b121-driving shaft sleeve convex block; 122-driving sleeve spline; b123-driving shaft sleeve gap; b124-the driving shaft is sleeved with a locking boss; b21-axial extension; b22-axle spline; b23-axle locking boss; b31-driven shaft sleeve; b32-driven wheel; b311-driven shaft sleeve locking boss; b312-driven shaft sleeve gap; b321-driven wheel splines; c1-gear hub spline; c2-gearbox bearing mounting face; c3-gear ring mounting face; c4-gear hub bearing surface; c5-gear hub locking boss; d1-locking unit; d2-locating piece; d3-support cylinder; d4-rolling ring; d11-support bar; d12-spring; d13-control block; d14-pin shaft; d15-locking block; d131-rolling ring mounting part; d132-spring mounting holes; d133-control block ramp; D134-Z-shaped grooves; d135-control block positioning table; d136-control block side positioning surface; d151-pin hole; d152, a positioning surface at the outer side of the locking block; d153-locking block locking notch; d154-end face of the locking block; d155-the inner side positioning surface of the locking block; d156-locking block inclined plane; d21-locating surface on locating block side; d22-arc surface of positioning block; d23-positioning block groove positioning surface; d24-bottom edge positioning surface; d31-supporting cylinder front cover; d32-supporting the cartridge body; d33-supporting cylinder rear cover; d311-front cover mounting holes; d312-front cover support rod hole; d321-an inner hole of the cylinder body; d322-barrel notch; d331-a rear cover support rod hole; d41-rolling ring extrusion surface; d42-rolling ring mounting groove; g1 — first line butt rail; g2-carrier strip; g3-stop bar; g4-transfer wheel rail; g5 — unlocking rail; g6 — second line docking rail; g21-rolling guide block; g41-horizontal segment of shifting wheel track; g42-transfer wheel rail inclined section; g51-unlocking the rail widening section; g52-unlocking the rail constant width section; a/c-unlocking/locking section; b-moving the wheel section.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

A locking device of a track-variable bogie is arranged in the middle of a track-variable wheel pair and mainly comprises a plurality of locking units D1, a plurality of positioning blocks D2, a supporting cylinder D3 and a rolling ring D4. When the bogie passes through a ground track gauge changing device arranged at the line junction of the two track gauges, the locking device automatically realizes unlocking/locking under the guidance of an unlocking rail of the bogie, so that wheels can/cannot move relative to an axle.

As shown in fig. 1, the track-variable wheel pair of the present invention comprises two axle boxes a, a set of axle assemblies B, a gear hub C, and a set of locking devices D located in the middle of the axle. The axle box A is installed at the both ends of shaft equipment B, and gear hub C installs the middle part at shaft equipment B, and locking device D then installs one end at gear hub C.

Compared with the conventional bogie, the variable-gauge bogie has the main characteristic that the variable-gauge wheel set is arranged, wheels of the variable-gauge wheel set can axially move to two different positions to adapt to two different gauges, and components of the bogie except the wheel set, such as a framework, a suspension system, a traction device and the like, do not need to be changed or only need to be locally adapted.

As shown in FIG. 2, the bottom of the axle box A is provided with an axle box transverse limiting surface A1 and an axle box vertical bearing surface A2. In the rail transfer stage, the axle box transverse limiting surface A1 is in contact with the rolling surface of a limiting strip G3 in the ground rail gauge conversion device G to limit the transverse position of the wheel pair so that the wheel pair is in an ideal rail transfer position; the axle box vertical bearing surface A2 contacts the rolling surface of the bearing strip G2 in the ground track gauge changing device G to bear the weight of the vehicle. At this point, the wheel is out of contact with the rail G1 or G6 in the ground gage changer G and the wheel is unloaded in preparation for its lateral movement or unlocking or locking.

As shown in fig. 3, the axle assembly B is composed of a driving wheel assembly B1, an axle B2, and a driven wheel assembly B3. When the bogie normally operates, the wheel axle assembly is locked by the locking device; when the bogie passes through the ground track gauge changing device, the locking device is unlocked, and the wheels can axially move relative to the axle.

As shown in fig. 4, the active wheel assembly B1 is composed of an active wheel B11 and an active axle sleeve B12.

As shown in fig. 5, the driving wheel B11 has a hole with a driving wheel spline B112 and a ring of driving wheel protrusion B111 on the inner side surface. The drive wheel spline B112 mates with an axle spline B22 on the axle B2. When the locking device D is unlocked, the spline fit can enable the driving wheel B11 to axially slide; when the locking device D is locked, the spline fit in turn enables drive torque to be transmitted between the driving wheel B11 and the axle B2. The driving wheel lug B111 is matched with a driving shaft sleeve lug B121 arranged at the end part of the driving shaft sleeve B12, so that the driving torque can be transmitted between the driving wheel B11 and the driving shaft sleeve B12.

As shown in fig. 6, a circle of driving shaft sleeve boss B121 is arranged at the end of the driving shaft sleeve B12, a driving shaft sleeve spline B122 is arranged on the middle outer diameter, 4 driving shaft sleeve notches B123 are evenly arranged on the other end in the circumferential direction, and two V-shaped driving shaft sleeve locking bosses B124 are arranged on the outer surface. The driving axle sleeve lug B121 is matched with a driving wheel lug B111 arranged on the inner side end face of the driving wheel B11, and can transmit driving torque. The main hub spline B122 mates with a gear hub spline C1 inside the gear hub C to transmit drive torque. The driving bushing notch B123 facilitates the crossing of the driving bushing B12 and the driven bushing B31. The driving shaft sleeve locking boss B124 is used for fixing the driving wheel assembly B1 on the axle B2.

As shown in fig. 7, the two ends of the axle B2 are respectively provided with an axle extension B21 and an axle spline B22, and the middle part is provided with 4V-shaped axle locking bosses B23 which are uniformly arranged in the circumferential direction. The axle extension B21 is used to mount axle box bearings to support the axle box. The axle spline B22 is for mating with the driving wheel spline B112 and the driven wheel spline B321. When the locking device D is unlocked, the spline fit can enable the driving wheel B11 and the driven wheel B32 to axially slide; the splined engagement, in turn, allows drive torque to be transmitted between the driving and driven wheels B11 and B32 and the axle B2 when the locking device D is locked. The axle locking boss B23 is used for fixing the driving wheel assembly B1 and the driven wheel assembly B3 through a locking device D.

As shown in fig. 8, the driven wheel assembly B3 is composed of a driven sleeve B31 and a driven wheel B32.

As shown in fig. 9, one end of the driven shaft sleeve B31 is uniformly provided with 4 driven shaft sleeve notches B312 along the circumferential direction, and the outer surface is provided with two V-shaped driven shaft sleeve locking bosses B311. The driven hub notch B312 facilitates the intersection of the driven hub B31 with the driving hub B12. The driven shaft sleeve locking boss B311 is used for fixing the driven wheel assembly B3 on the axle B2.

As shown in fig. 10, a driven wheel spline B321 is provided in the hole of the driven wheel B32. The driven wheel spline B321 mates with an axle spline B22 on the axle B2. When the locking device D is unlocked, the spline fit can enable the driven wheel B32 to axially slide; the splined engagement, in turn, allows drive torque to be transmitted between the driven wheel B32 and the axle B2 when the locking device D is locked.

As shown in fig. 11, the inner hole of the gear hub C is provided with a gear hub spline C1, the middle part is provided with a gear ring mounting surface C3, the outer surfaces of two sides of the gear ring mounting surface C3 are respectively provided with a gear box bearing mounting surface C2, and the outer surface of one end is provided with a gear hub supporting surface C4 and a gear hub locking boss C5. The gear hub spline C1 mates with the drive sleeve spline B122 to allow the drive wheel assembly B1 to slide axially relative to the gear hub C, even though the gear hub C can transmit drive torque to the axle assembly B. The ring gear mounting face C3 is used to mount the outer sleeve ring gear to form a complete gear. The gear box bearing mounting surface C2 is used for mounting a rolling bearing to support the gear box body. The gear hub bearing surface C4 mates with the front cover mounting hole D311 for supporting the locking device D. The gear hub locking boss C5 is used to secure the locking block D15.

As shown in fig. 12, the locking device D is composed of 6 locking units D1, 6 positioning blocks D2, a supporting cylinder D3, and two rolling rings D4. The locking unit D1 and the positioning block D2 are evenly distributed in the supporting cylinder D3 in a circumferential shape. The locking unit D1 and the positioning block D2 are spaced apart from each other. The positioning block D2 is fixed in the supporting cylinder D3. The two rolling rings D4 are connected with the locking unit and arranged outside the supporting cylinder D3. The locking device D is used for locking the driving wheel assembly B1 and the driven wheel assembly B3 to the axle B2 or unlocking the driving wheel assembly B1 and the driven wheel assembly B3 from the axle B2.

As shown in fig. 13, the locking unit D1 comprises a supporting rod D11, a spring D12, a control block D13, two pins D14, and a locking block D15. The locking unit D1 is used for converting the axial movement of the control block D13 into the radial movement of the locking block D15, thereby realizing the locking and unlocking of the locking device D. When the bogie normally operates, the locking unit D1 is in a locking state; when the track gauge is changed, the locking unit D1 is in the unlocked state.

The supporting rod D11 is fixedly arranged in the front cover supporting rod hole D312 or the rear cover supporting rod hole D331 on the supporting cylinder D3 and is used for supporting the spring D12.

The spring D12 is a cylindrical spiral compression steel spring, is mounted on the support rod D11 and is located in the spring mounting hole D132 of the control block D13 for providing a restoring force and a locking force for the locking device D.

As shown in fig. 14, the control piece D13 is provided with a roller ring mounting portion D131, a spring mounting hole D132, two control piece inclined surfaces D133, two Z-shaped grooves D134, two control piece positioning tables D135, and two control piece side positioning surfaces D136. The roller ring mounting portion D131 is used to connect to the roller ring D4. The spring mounting hole D132 is used to accommodate a spring D12. The control block inclined surface D133 is engaged with the locking block inclined surface D156 for holding or releasing the locking block D15 in the locked state. The Z-shaped slot D134 limits the path of travel of the pin D14. The lower part of the control block positioning table D135 is an arc surface and is contacted with a cylinder inner hole D321 of a supporting cylinder D32 to radially position a control block D13; the upper part is a plane and is contacted with the bottom edge positioning surface D24 of the positioning block D2, and the control block D13 is limited to slide axially only. The control block side positioning surface D136 contacts the block inside positioning surface D155 of the block D15 for restricting the rotation of the block D15.

The pin D14 is fixedly mounted in the pin hole D151 of the locking block D15 and extends into the Z-shaped slot D134 of the control block D13 to control the relative movement of the locking block D15 and the control block D13.

As shown in a) and b) of fig. 15, the locking block D15 is provided with two pin holes D151, two locking block outer positioning surfaces D152, two locking block locking notches D153, two locking block end surfaces D154, two locking block inner positioning surfaces D155, and two locking block inclined surfaces D156. The pin hole D151 is used for fixedly mounting the pin shaft D14. One locking block locking notch D153 is used for fixing the locking block D15 on the gear hub locking boss C5, and the other locking block locking notch D153 is used for locking the axle locking boss B23, the driving shaft sleeve locking boss B124 and the driven shaft sleeve locking boss B311 into a whole. The locking block outer side positioning surface D152 is in contact with the positioning block side positioning surface D21 of the positioning block D2, the locking block inner side positioning surface D155 is in contact with the control block side positioning surface D136 of the control block D13, the locking block end surface D154 is in contact with the positioning block groove positioning surface D23 of the positioning block D2, and the locking block outer side positioning surface D155, the control block side positioning surface D13, the locking block groove positioning surface D23 and the locking block groove positioning surface D15 are limited in installation position. The locking block ramp D156 cooperates with the control block ramp D133 to hold or release the locking block D15.

As shown in fig. 16, the positioning block D2 is provided with two positioning block side positioning surfaces D21, one positioning block arc surface D22, four positioning block groove positioning surfaces D23, and two bottom side positioning surfaces D24. The positioning block arc surface D22 is fixedly arranged on the cylinder body inner hole D321 of the supporting cylinder D3.

As shown in fig. 17, the limiting principle of the positioning block to the locking unit is: the notch formed by the positioning surface D21 on the positioning block side and the positioning surface D23 on the positioning block groove is used for placing the locking block D15 and limiting the locking block to move only in the radial direction; the bottom positioning surface D24 contacts the upper flat surface of the control block positioning table D135, limiting the axial sliding movement of the control block D13.

As shown in fig. 18, the support cylinder D3 is composed of a support cylinder front cover D31, a support cylinder body D32, and a support cylinder rear cover D33. The three parts are connected to form a hollow cavity for installing the locking unit D1 and the positioning block D2.

The front cover D31 of the supporting cylinder is provided with a front cover mounting hole D311 and three front cover support rod holes D312. The front cover mounting hole D311 is fitted with the gear hub bearing surface C4 for supporting the locking device D on the gear hub C. The front cover support rod hole D312 is used for fixedly mounting the support rod D11.

The supporting cylinder body D32 is provided with a cylinder body inner hole D321 and six cylinder body notches D322. The cylinder inner hole D321 is used for fixing the positioning block D2 and radially positioning the control block D13. Barrel notch D322 is used to provide mounting and axial movement space for the roller ring mounting portion D131 of control block D13.

Three rear cover support rod holes D331 are provided in the support cylinder rear cover D33. The rear cover support rod hole D331 is used to fixedly mount the support rod D11.

As shown in fig. 19, the roller ring D4 is provided with a roller ring pressing surface D41 and three roller ring mounting grooves D42. The rolling ring extrusion surface D41 is subjected to wear-resistant strengthening treatment to adapt to lateral extrusion and friction of the unlocking rail G5, the distance between the rolling ring extrusion surfaces D41 of the two rolling rings D4 automatically adapts to the width of the unlocking rail G5, and therefore the control block D13 is driven to move axially, and locking or unlocking of the locking device D is achieved. The roller mounting groove D42 is used for mounting the roller mounting portion D131 on the control block D13.

As shown in fig. 20, the unlocking process of the locking device D is as follows: the bogie drives into the ground track gauge changing device G, the unlocking rail G5 enters between two rolling rings D4 of the locking device D, the unlocking rail G5 which gradually widens extrudes the two rolling rings D4 towards two sides along with the advancing of the bogie, the rolling rings D4 drive the control blocks D13 which are connected together to move axially outwards, the spring D12 is compressed, meanwhile, the pin shaft D14 moves along the Z-shaped groove D134, due to the limitation of the Z-shaped groove D134, the pin shaft D14 moves radially outwards while moving axially outwards, the locking blocks D15 which are connected together are driven to move radially outwards, so that the locking block locking notches D153 are separated from the locking position, the locking device D is unlocked, and the driving wheel component B1 and the driven wheel component B3 are in an axially movable state.

As shown in fig. 21, the locking process of the locking device D is as follows: when the driving wheel component B1 and the driven wheel component B3 move in place axially, the unlocking rail G5 narrows gradually along with the continuous advance of the bogie, under the action of the restoring force of the spring D12, the two rolling rings D4 are folded towards the middle, the rolling rings D4 drive the control blocks D13 connected together to move axially towards the middle, and simultaneously the pin shaft D14 moves along the Z-shaped groove D134, due to the limitation of the Z-shaped groove D134, the pin shaft D14 moves radially inwards while moving axially towards the middle, the locking blocks D15 connected together are driven to move radially inwards, so that the locking block locking notches D153 enter the locking position, the locking device D locks, and the driving wheel component B1 and the driven wheel component B3 are in the locking state.

As shown in fig. 22, the locking manner of the axle assembly is as follows: when the driving wheel component B1 and the driven wheel component B3 move in place, the axle locking boss B23, the driving shaft sleeve locking boss B124 and the driven shaft sleeve locking boss B311 are overlapped into a complete circle in the circumferential direction (the V-shaped side surfaces of the bosses are overlapped), and are simultaneously covered by the locking notch D153, so that the locking notches cannot move mutually, namely, in a locking state, the driving wheel component B1 and the driven wheel component B3 are axially locked on the axle B2. When the locking block locking notch D153 is removed in the radial direction, the axle locking boss B23, the driving shaft sleeve locking boss B124, and the driven shaft sleeve locking boss B311 are axially unrestrained and can move axially relative to each other, i.e., in an unlocked state.

The track changing action of the track gauge changing bogie is finished by the guidance of the ground track gauge changing device G. The ground track gauge changing device G is arranged between two different track gauge lines. When the variable gauge bogie passes through the ground gauge conversion device G, a specific structure in the ground gauge conversion device G can automatically and sequentially trigger the unlocking, wheel moving and locking actions of the variable gauge wheel set, so that the bogie completes gauge conversion.

As shown in fig. 23, the ground track gauge changing device G is composed of a pair of first line butt rails G1, two rows of carrier bars G2, two rows of stopper bars G3, two sets of wheel moving rails G4, an unlocking rail G5, and a pair of second line butt rails G6. The first line butt joint rail G1 is externally connected with a first line, the second line butt joint rail G6 is externally connected with a second line, and the track gauge of the first line is different from that of the second line. A row of carrying strips G2 are respectively arranged at both sides and used for bearing the weight of the vehicle; and a row of limiting strips G3 are arranged on each side of the wheel pair respectively and used for limiting the transverse position of the wheel pair. And a group of wheel moving rails G4 are respectively arranged on two sides and connected with the first line butt joint rail G1 and the second line butt joint rail G6 for guiding the wheels to move transversely. An unlocking rail G5 is arranged in the middle and used for guiding the locking device D to unlock and lock.

As shown in fig. 23, the transfer rail G4 is composed of two rails spaced apart slightly larger than the width of the wheel rim, and is divided into two horizontal sections G41 at the two ends and a middle inclined section G42 at the middle. The transfer rail horizontal segment G41 is used to keep the lateral position of the wheel constant during unlocking or locking. The transfer rail inclined section G42 is used to guide the lateral movement of the wheel.

As shown in fig. 23, the unlocking rail G5 is a rail having two sharp ends and a thick middle, and is divided into an unlocking rail widening section G51 at the two ends and an unlocking rail constant-width section G52 at the middle. The unlocking rail width-changing section G51 is used for guiding the locking device D to unlock or lock, and the unlocking rail constant width section G52 is used for ensuring that the locking device D keeps an unlocking state in the wheel moving process.

As shown in fig. 24, the carrier bar G2 and the stopper bar G3 are each composed of rolling guide blocks G21 aligned in a row. The rolling guide rail block G21 is a universal independent structural component, has high bearing capacity and good rolling performance, and is convenient for maintaining the stability of the rail changing process of the variable-gauge bogie.

As shown in fig. 25, the ground track gauge changing device G can be divided into three sections a, b, and c according to function, wherein the sections a and c are mutually locking/unlocking sections, and the section b is a wheel moving section. The horizontal segment G41 of the transfer wheel rail and the unlocking rail width-changing segment G51 are positioned at the segments a and c, and the inclined segment G42 of the transfer wheel rail and the constant width segment G52 of the unlocking rail are positioned at the segment b.

As shown in fig. 26, when a change from the first track to the second track is required, the track gauge change process is as follows:

and I, unlocking. The wheelset is driven into the unlocking section a of the ground track gauge changing device G via the first track butt rail G1. The axle box transverse limiting surface A1 at the bottom of the axle box A is in contact with the rolling surface of the limiting strip G3, so that the transverse position of the wheel pair is limited; meanwhile, the axle box vertical bearing surface A2 at the bottom of the axle box A is in contact with the rolling surface of the bearing strip G2, so that the weight of the vehicle is borne; the wheel falls into the groove of the transfer rail G4, the side of the wheel rim is restrained by the transfer rail G4, and the wheel is out of contact with the first line butt rail G1. At this point the axle box is loaded, the wheels are unloaded and the gauge change begins. The unlocking rail widening section G51 gradually widens, and the rolling ring D4 is moved outwards to drive the locking device D to unlock.

II, moving the wheel. The wheel set enters a wheel shifting section b of the ground track gauge changing device G. The inclined segment G42 of the transfer wheel rail clamps the wheel to move transversely, thus completing the change of the track gauge. In the process, the limiting strip G3 limits the transverse position of the wheel pair, the bearing strip G2 bears the weight of the vehicle, and the constant-width section G52 of the unlocking rail enables the locking device D to keep the unlocking state.

And III, locking. The wheel pair enters the locking section c of the ground track gauge changing device G. The unlocking rail widening section G51 becomes narrower gradually, the rolling ring D4 is loosened and limited gradually, and the locking device D completes locking under the restoring force of the spring D12. Then the axle box transverse limiting surface A1 is separated from the contact with the limiting strip G3, the axle box vertical bearing surface A2 is separated from the contact with the bearing strip G2, and the wheel is separated from the wheel moving rail G4 and is contacted with the second line butt joint rail G6. At this time, the axle box is unloaded, the wheels are loaded, and the track gauge change is finished.

When the wheel set needs to be switched from the second line to the first line, the wheel set drives into the ground track gauge switching device G through the second line butt joint rail G6 and drives out of the first line butt joint rail G1, c is an unlocking section, a is a locking section, and the track gauge switching processes are completely the same. Therefore, the ground track gauge changing device G and the track gauge changing bogie can be reversibly changed in two directions.

The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.

Claims

1. The utility model provides a locking device of roll over bogie which characterized in that: the locking device is used for locking the driving wheel assembly (B1) and the driven wheel assembly (B3) onto the axle (B2) or unlocking the driving wheel assembly (B1) and the driven wheel assembly (B3) from the axle (B2); the locking device comprises a supporting cylinder (D3) sleeved outside an axle (B2), a plurality of locking units (D1) and a plurality of positioning blocks (D2) circumferentially arranged in the supporting cylinder (D3), and a rolling ring (D4) arranged outside the supporting cylinder (D3);

the locking unit (D1) and the positioning block (D2) are separated from each other, and the rolling ring (D4) is connected with the locking unit (D1);

the locking unit (D1) is in a locked state when the bogie normally operates and in an unlocked state when the bogie changes track gauge.

2. The locking device of a bogie according to claim 1, wherein said active wheel assembly (B1) comprises an active wheel (B11) and an active bushing (B12);

the driven wheel assembly (B3) comprises a driven shaft sleeve (B31) and a driven wheel (B32);

the driving shaft sleeve (B12) is in cross fit with the driven shaft sleeve (B31), and a locking device (D) is arranged at the matching position of the driving shaft sleeve (B12) and the driven shaft sleeve (B31);

the active wheel (B11) and the axle (B2) are matched to have two states: when the lock is unlocked, the driving wheel (B11) can axially slide relative to the axle (B2), and when the lock is locked, the driving wheel (B11) and the axle (B2) can transmit driving torque;

the driven wheel (B32) has two states in cooperation with an axle (B2): when unlocked, the driven wheel (B32) can slide axially relative to the axle (B2), and when locked, the driven wheel (B32) and the axle (B2) can transmit driving torque.

3. Locking device for a bogie according to claim 1, characterised in that said locking unit (D1) comprises a control block (D13), a locking block (D15) mounted on the control block (D13), a support rod (D11) and a spring (D12) mounted in the control block (D13), and a pin (D14) mounted on the locking block (D15); the axial movement of the control block (D13) can be converted into the radial movement of the locking block (D15) to realize the locking and unlocking of the locking device (D).

4. Locking device of a pitch bogie according to claim 3, characterized in that the support bar (D11) is fixedly mounted in a front cover support bar hole (D312) or a rear cover support bar hole (D331) on the bearing cylinder (D3) for bearing the spring (D12); the spring (D12) is installed on the support rod (D11), and the spring (D12) is arranged in a spring installation hole (D132) of the control block (D13) and is used for providing restoring force and locking force for the locking device (D);

preferably, the spring (D12) is a cylindrical helical compression steel spring.

5. The locking device of a track-changing bogie according to claim 3, characterized in that the control block (D13) is provided with a rolling ring mounting part (D131), a spring mounting hole (D132), two control block inclined planes (D133), two Z-shaped grooves (D134), two control block positioning tables (D135) and two control block side positioning planes (D136); the rolling ring mounting part (D131) is used for being connected with a rolling ring (D4); the spring mounting hole (D132) is used for accommodating a spring (D12); the control block inclined surface (D133) and the locking block inclined surface (D156) are matched to enable the locking block (D15) to maintain or release a locking state.

6. Locking device for a pitch bogie according to claim 5, characterized in that said Z-shaped slot (D134) is used to limit the movement path of the pin (D14);

the lower part of the control block positioning table (D135) is in contact with a cylinder inner hole (D321) of a supporting cylinder body (D32) and is used for radially positioning the control block (D13); the upper part of the control block positioning table (D135) is contacted with the bottom edge positioning surface (D24) of the positioning block (D2) and is used for limiting the control block (D13) to only slide axially;

the control block side positioning surface (D136) is contacted with the locking block inner side positioning surface (D155) of the locking block (D15) and is used for limiting the rotation of the locking block (D15);

the pin shaft (D14) is fixedly arranged in a pin hole (D151) of the locking block (D15) and extends into a Z-shaped groove (D134) of the control block (D13) to control the relative movement of the locking block (D15) and the control block (D13);

preferably, the lower part of the control block positioning table (D135) is an arc surface, and the upper part is a plane.

7. The locking device of the variable-track-pitch bogie according to claim 3, wherein the locking block (D15) is provided with two pin holes (D151), two locking block outer side positioning surfaces (D152), two locking block locking notches (D153), two locking block end surfaces (D154), two locking block inner side positioning surfaces (D155) and two locking block inclined surfaces (D156);

the pin hole (D151) is used for fixedly mounting a pin shaft (D14); one of the two locking block locking notches (D153) is used for fixing the locking block (D15) on the gear hub locking boss (C5), and the other locking block locking notch (D153) is used for locking the axle locking boss (B23), the driving shaft sleeve locking boss (B124) and the driven shaft sleeve locking boss (B311) into a whole; the locking block outer side positioning surface (D152) is in contact with a positioning block side positioning surface (D21) of a positioning block (D2), the locking block inner side positioning surface (D155) is in contact with a control block side positioning surface (D136) of a control block (D13), the locking block end surface (D154) is in contact with a positioning block groove positioning surface (D23) of the positioning block (D2), and the locking block outer side positioning surface (D152), the locking block inner side positioning surface (D155) and the locking block end surface (D154) limit the installation position and the movement direction of the locking block (D15) together;

the locking block inclined surface (D156) is matched with the control block inclined surface (D133) and is used for keeping or releasing the locking state of the locking block (D15).

8. The locking device of a variable-track-pitch bogie according to any one of claims 1 to 7, wherein the positioning block (D2) is provided with two positioning block side positioning surfaces (D21), one positioning block circular arc surface (D22), four positioning block groove positioning surfaces (D23) and two bottom side positioning surfaces (D24);

the arc surface (D22) of the positioning block is fixedly arranged on the cylinder inner hole (D321) of the supporting cylinder (D3).

9. The locking device of a variable-track-pitch bogie according to any one of claims 1 to 7, wherein the supporting cylinder (D3) comprises a supporting cylinder body (D32), a supporting cylinder front cover (D31) mounted at the front end of the supporting cylinder body (D32), and a supporting cylinder rear cover (D33) mounted at the rear end of the supporting cylinder body (D32); the front cover (D31) of the supporting cylinder, the cylinder body (D32) of the supporting cylinder and the rear cover (D33) of the supporting cylinder are connected to form a hollow cavity for installing a locking unit (D1) and a positioning block (D2);

the front cover (D31) of the supporting cylinder is provided with a front cover mounting hole (D311), and the front cover mounting hole (D311) is used for matching with a gear hub supporting surface (C4) of the gear hub to support the locking device (D) on the gear hub (C);

the supporting cylinder body (D32) is provided with a cylinder body inner hole (D321) and six cylinder body notches (D322); the cylinder inner hole (D321) is used for fixing the positioning block (D2) and radially positioning the control block (D13); the barrel notch (D322) is used for providing installation and axial movement space for the rolling ring installation part (D131) of the control block (D13).

10. The locking device of a track-variable bogie according to any one of claims 1-7, wherein the roller ring (D4) is provided with one roller ring pressing surface (D41) and three roller ring mounting grooves (D42); the rolling ring mounting groove (D42) is used for mounting a rolling ring mounting part (D131) on the control block (D13).