CN108909761B

CN108909761B - A kind of axle box for gauge-changeable wheelsets

Info

Publication number: CN108909761B
Application number: CN201810732205.7A
Authority: CN
Inventors: 王玉光; 刘晓妍; 黄运华; 于祥; 于大海
Original assignee: Southwest Jiaotong University; CRRC Qingdao Sifang Co Ltd
Current assignee: Southwest Jiaotong University; CRRC Qingdao Sifang Co Ltd
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2019-11-22
Anticipated expiration: 2038-07-05
Also published as: CN108909761A

Abstract

The present invention relates to gauge changing fields, disclose a kind of axle box for gauge-changeable wheelsets, it is axially successively arranged the first annular channel and the second circular passage being connected from outside to inside along it in axle box, the internal diameter in first annular channel is greater than the internal diameter of the second circular passage, first annular channel is used for installation locking block, second circular passage is for installing the latch segment locating ring being interference fitted with it, the locking assembly being slidably matched with it is equipped in latch segment locating ring, locking assembly is fixedly connected with wheel and is slidably mounted on axle, the outer end face of axle box is equipped with dismountable outer end cap, outer end cap is equipped with the first through hole entered for solution lock set, latch segment locating ring is equipped with the second through-hole passed through for latch segment, locking locking assembly is pushed along the second through-hole by unlock components drive latch segment, by pushing solution lock set to leave Latch segment, so that latch segment, which leaves locking assembly, realizes unlock.Axle box of the invention can satisfy the installation requirements of gauge changing mechanism.

Description

A kind of axle box for gauge-changeable wheelsets

Technical field

The present invention relates to train gauge changing technical fields, more particularly to a kind of axle box for gauge-changeable wheelsets.

Background technique

With the rapid development of global economic integration, transnational passenger and freight transportation rapid development in recent years, however by It is different in the gauge of various countries' railway, so that the railway transportation to transnational causes serious obstruction.In order to solve various countries' railway Gauge difference causes the problem of hindering to transnational railway transportation, and the train of gauge changing is proposed to this, that is, works as train driving When on to the railway of its state, by changing itself wheel to the spacing between upper wheel, to adapt to the gauge of its state's railway.

For gauge-changeable wheelsets, need that gauge changing mechanism additionally is arranged, this is to script space with regard to very compact bogie For propose higher design requirement, in order to make full use of the existing space of bogie, the space in axle box is utilized It is optimal selection.However, existing structure of axle box is also unable to satisfy the installation requirement of gauge changing mechanism.

Summary of the invention

(1) technical problems to be solved

The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.

The object of the present invention is to provide a kind of axle boxes for gauge-changeable wheelsets for being easily installed gauge changing mechanism.

(2) technical solution

In order to solve the above technical problem, the present invention provides a kind of axle box for gauge-changeable wheelsets, including axle box, institutes It states in axle box and is axially successively arranged the first annular channel and the second circular passage being connected from outside to inside along it, described first The internal diameter of circular passage is greater than the internal diameter of second circular passage, and the first annular channel is for installing and its elastic connection Latch segment, second circular passage is for installing the latch segment locating ring being interference fitted with it, the latch segment locating ring It is interior equipped with the locking assembly being slidably matched with it, the locking assembly with wheel for being fixedly connected and being slidably mounted in vehicle On axis, the outer end face of the axle box is equipped with dismountable outer end cap, and the outer end cap is equipped with the entered for solution lock set One through-hole, the latch segment locating ring are equipped with the second through-hole passed through for latch segment, are passed through by the solution lock set described First through hole pushes the latch segment to push along second through-hole and locks the locking assembly, by pushing the solution lock set It is displaced outwardly along the first through hole and leaves the latch segment, so that the latch segment, which leaves the locking assembly, realizes unlock.

Wherein, the inner face of the axle box, which is equipped with, penetrates the third in the latch segment locating ring for the locking assembly Through-hole；The wheel is set on the inner sleeve by inner sleeve and the axle slidable connection, the wheel fixation, institute Locking assembly fixing sleeve is stated on the inner sleeve of the lateral wheel, and is located at the axle box at the axle both ends In, the latch segment elastic connection is in the first annular channel, and the outer surface of the locking assembly is along the transformation side of gauge To multiple card slots are equipped with, the latch segment is inserted into the card slot from second through-hole under the thrust of the solution lock set It is middle to realize the locking assembly locking, the latch segment is left along the first through hole by the promotion solution lock set, it is described Latch segment shrinks away from the card slot upwards in the presence of a tensile force and realizes the locking assembly unlock.

Wherein, the inner wall in the first annular channel is equipped with the sliding groove that axially extends, the sliding groove in be open it is small, The big T-type of slot bottom or dovetail groove profile；The latch segment includes the sliding shoe locking block main body and matching with the sliding groove, institute It states latch segment to be mounted in the sliding groove by the sliding shoe, by the between the sliding shoe and the locking block main body The connection of one elastic component.

Wherein, the inner circumferential of the inner sleeve is equipped with internal spline, and the both ends of the axle are respectively equipped with and the internal spline phase Matched external splines, the inner sleeve are connect by the internal spline with external splines with the axle.

Wherein, the locking assembly includes bearing and bearing outside, and the inner ring of the bearing is fitted on the inner sleeve, The bearing outside is fitted in the outer ring of the bearing, clearance fit between the bearing outside and the latch segment locating ring； The peripheral distribution of the bearing outside has card slot described in multiple groups, and card slot described in every group includes multiple axial directions along the bearing outside The spaced card slot, the distance at interval are equal to the half of required gauge changing.

Wherein, inner circumferential of the latch segment along the first annular channel of the axle box is uniformly arranged, card slot described in multiple groups Periphery along the bearing outside is uniformly distributed.

Wherein, the solution lock set includes the pushing block of terminal pad and elastic connection the disk circumferential direction in the terminal pad, institute It states terminal pad to be located at outside the outer end cap of the axle box, the first through hole on the outer end cap and the pushing block are one by one It is corresponding, the pushing block pass through the first through hole and on the inside of each pushing block and the outer end cap to be equipped with second elastic Part, the pushing block are arranged in a one-to-one correspondence with the latch segment.

Wherein, the outer end face of the latch segment locating ring is equipped with the channel for corresponding and being connected to second through-hole, The channel enters for the pushing block, pushes the latch segment being located in the second through-hole.

Wherein, the outer end of the pushing block is set as inclined surface, and the latch segment is equipped with corresponding with the inclined surface Wedge groove, the inclined surface and wedge groove tilt from bottom to top from outside to inside.

Wherein, the periphery of the terminal pad is equipped with solution lock end, and the solution lock end is used to be caught in the unlock rail on ground, The outside for pushing the terminal pad to unlock rail by the through slot in the unlock rail is mobile, so that the pushing block be driven to leave institute Latch segment is stated, is unlocked.

Wherein, the bottom of the axle box is equipped with support plate, is coated with wear-resistant material in the support plate.

(3) beneficial effect

Compared with prior art, the invention has the following advantages that

A kind of axle box for gauge-changeable wheelsets provided by the invention, including axle box, the axle box are interior along its axial direction It is successively arranged the first annular channel and the second circular passage being connected from outside to inside, the first annular channel is for installing lock The internal diameter of tight block, the first annular channel is greater than the internal diameter of second circular passage, so that it is bigger to guarantee that latch segment has Activity space, for install the latch segment locating ring being interference fitted with it, the latch segment is positioned for second circular passage The locking assembly being slidably matched with it is equipped in circle, the locking assembly is fixedly connected with wheel and is slidably mounted in axle On, the outer end face of the axle box is equipped with dismountable outer end cap, and the outer end cap is equipped with first entered for solution lock set Through-hole, the latch segment locating ring are equipped with the second through-hole for passing through for latch segment, by the solution lock set across described the One through-hole pushes the latch segment to push along second through-hole and locks the locking assembly, by pushing the solution lock set edge The first through hole, which is displaced outwardly, leaves the latch segment, so that the latch segment, which leaves the locking assembly, realizes unlock；It is logical Cross and design the structure of axle box, make full use of the space in axle box, can in gauge changing mechanism locking assembly, solution lock set with And latch segment provides matched installation space, provides safeguard for wheel to gauge changing, while saving exterior space for bogie.

Detailed description of the invention

Fig. 1 is a kind of stereoscopic schematic diagram of the axle box removal outer end cap for gauge-changeable wheelsets of the present invention；

Fig. 2 is a kind of stereoscopic schematic diagram of the axle box for gauge-changeable wheelsets of the present invention；

Fig. 3 is the assembly axial sectional view of gauge-changeable wheelsets and axle box of the present invention；

Fig. 4 is the left-half schematic diagram in Fig. 1 of the present invention；

Fig. 5 is the partial enlarged view in Fig. 2 at A；

Fig. 6 is the structural schematic diagram of locking device in the present invention；

Fig. 7 is the top view that rail is unlocked in the present invention；

Fig. 8 is the structural schematic diagram that lock set is solved in the present invention；

Fig. 9 is the schematic perspective view of latch segment in the present invention；

Figure 10 is the structural schematic diagram of the latch segment locating ring in the present invention；

Figure 11 is the structural schematic diagram of middle (center) bearing housing of the present invention；

Figure 12 is the structural schematic diagram of inner sleeve in the present invention；

Figure 13 is the structural schematic diagram of axle in the present invention；

In figure: 1- bearing；2- axle box；3- bearing outside；4- latch segment locating ring；The second through-hole of 5-；6- latch segment；7- Card slot；8- first through hole；9- pushing block；The channel 10-；The inclined surface 11-；12- wedge groove；The second elastic component of 13-；The first elasticity of 14- Part；15- terminal pad；16- unlocks rail；17- through slot；18- wheel；19- axle；20- inner sleeve；21- external splines；22- internal spline； The first chamfering of 23-；The second chamfering of 24-；25- support plate；26- sliding groove；The first annular channel 27-；The second circular passage 28-； 29- third through-hole；30- outer end cap.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below Example is not intended to limit the scope of the invention for illustrating the present invention.

In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair Limitation of the invention.In addition, term " first ", " second ", " third " etc. are used for description purposes only, and should not be understood as instruction or Imply relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, concrete condition can be regarded and understand that above-mentioned term exists Concrete meaning in the present invention.

In addition, in the description of the present invention, unless otherwise indicated, " multiple ", " more ", " multiple groups " be meant that two or It is more than two.

As shown in figures 1 to 6, the embodiment of the invention provides a kind of axle box for gauge-changeable wheelsets, including axle box 2, institutes It states in axle box 2 and is axially successively arranged the first annular channel 27 being connected and the second circular passage 28, institute from outside to inside along it The internal diameter for stating first annular channel 27 is greater than the internal diameter of second circular passage 28, from Fig. 1-6 as can be seen that the first ring The junction of shape channel 27 and the second circular passage 28 forms boss, and the first annular channel 27 is used for installation locking block 6, lock Tight block 6 has activity space identical with boss height, moves up and down convenient for latch segment 6, second circular passage 28 is used for The latch segment locating ring 4 being interference fitted with it is installed, is equipped with the locking group being slidably matched with it in the latch segment locating ring 4 Part, the locking assembly are fixedly connected with wheel 18 and are slidably mounted on axle 19, and the outer end face of the axle box 2 is set There is dismountable outer end cap 30, the outer end cap 30 is equipped with the first through hole 8 entered for solution lock set, the latch segment positioning Circle 4 is equipped with the second through-hole 5 passed through for latch segment 6, passes through the first through hole 8 by the solution lock set and pushes the lock Tight block 6 is pushed along second through-hole 5 locks the locking assembly, by pushing the solution lock set along the first through hole 8 It is displaced outwardly and leaves the latch segment 6, so that the latch segment 6, which leaves the locking assembly, realizes unlock；By designing the axis Box structure makes full use of the space in axle box, can mention for locking assembly, solution lock set and the latch segment in gauge changing mechanism For matched installation space, gauge changing is provided safeguard for wheel, while saving exterior space for bogie.

It is penetrated in the latch segment locating ring as shown in Figure 1, the inner face of the axle box 2 is equipped with for the locking assembly Third through-hole 29, the internal diameter of third through-hole 29 is identical as the internal diameter of latch segment locating ring 4, thus third through-hole 29 and latch segment Locating ring 4 provides integrated smooth installation through-hole for locking assembly；The wheel 18 can by inner sleeve 20 and the axle 19 It is slidably connected, the fixation of wheel 18 is set on the inner sleeve 20, and the two interference is connected as an entirety, it is ensured that works as vehicle When torque transmitting occurring between wheel 18 and inner sleeve 20, it is not susceptible to relative motion between inner sleeve 20 and wheel 18, thus really The overall stability between wheel 18 and inner sleeve 20 is protected；As illustrated by figs. 12-13, the specific connection of inner sleeve 20 and axle 19 Mode, which is used, is equipped with internal spline 22 in the inner circumferential of inner sleeve 20, and the both ends of the axle 19 are respectively equipped with and 22 phase of internal spline Matched external splines 21, the inner sleeve 20 are connect by the internal spline 22 with external splines 21 with the axle 19, thus will Torque is evenly distributed on the inner circumferential of wheel 18 and inner sleeve 20, both convenient for transmitting torque, is also convenient for wheel 18 and slides along axle 19 Realize gauge changing, moreover, because wheel 18 will not directly be in contact with axle 19, because of the abrasion of the wheel 18 without caused by, from And improve the service life of wheel 18；The locking device includes locking assembly, the reconciliation lock set of latch segment 6, the locking Component fixing sleeve is set on the inner sleeve 20 in 18 outside of wheel, and is located in the axle box 2 at 19 both ends of axle, 6 elastic connection of latch segment is in the axle box 2, outer surface the changing direction equipped with more along gauge of the locking assembly A card slot 7, the latch segment 6 are inserted into the card slot 7 under the thrust of the solution lock set from second through-hole 5 real The existing locking assembly locking, before 18 gauge changing of wheel, is always maintained at the locking state, when wheel 18 needs to unlock, By pushing the solution lock set to leave the latch segment 6 along the first through hole 8, the latch segment 6 is in the presence of a tensile force The card slot 7 is shunk away from upwards realizes the locking assembly unlock；At this point, making to the thrust that wheel 18 applies outwardly or inwardly The distance that wheel 18 moves in or out required gauge changing is obtained, lock set is solved immediately and thrust, locking is applied to latch segment 6 again Block 6 meets the demand of train gauge changing again insertable into the locking of wheel 18 is realized in the card slot 7 after gauge changing.

Specifically, the locking assembly includes bearing 1 and bearing outside 3, and the inner ring of the bearing 1 is fitted in the inner sleeve On cylinder 20, as shown in fig. 6, the outer ring that the bearing outside 3 is fitted in the bearing 1 forms a sliding entirety, and sliding Whole both ends prevent the oil leak in bearing 1 using sealing, also avoid external dust sundries etc. from entering the sliding whole In, clearance fit between the bearing outside 3 and the axle box 2, when train normally travel, axle 19 needs opposite axle box Body 2 rotates, so that inner sleeve 20 is also required to rotate relative to axle box 2.By the way that the bearing is arranged on the inner sleeve 20, make When proper inner sleeve 20 rotates, suffered resistance is smaller and will not wear, to extend the use longevity of inner sleeve 20 Life；As shown in figure 11, the periphery of the bearing outside 3 is intervally distributed with card slot 7 described in multiple groups, and card slot 7 described in every group includes more The distance of a spaced card slot 7 in the axial direction along the bearing outside 3, that is, gauge changing direction, interval is equal to required change The half of gauge, in gauge changing, the wheel 18 at 19 both ends of axle is mobile simultaneously, gauge changing needed for two each movements of wheel 18 One half-distance, then total moving distance is just the distance of required gauge changing, such as becomes arrow gauge or broad gage from standard gauge； Or become standard gauge from arrow gauge or broad gage, institute's gauge changing can be selected according to specific needs.

Specifically, as shown in fig. 6, inner circumferential of the latch segment 6 along the first annular channel 27 of the axle box 2 is uniformly arranged Cloth, specifically, as shown in Figure 1, the inner wall in the first annular channel 27 is equipped with the sliding groove 26 axially extended, the sliding The T-type or dovetail groove profile that slot 26 is small in opening, slot bottom is big, thus, after sliding shoe is mounted in sliding groove 26, it will not take off It falls, to ensure the installation accuracy of latch segment 6；As shown in figure 9, the latch segment 6 include locking block main body and with the sliding The sliding shoe that slot 26 matches, the latch segment 6 are mounted in the sliding groove 26 by the sliding shoe, are installed when regulating Behind position, sliding shoe can be fastened in sliding groove 26 by fastener and fix its position, the sliding shoe and the latch segment It is connected between main body by the first elastic component 14 such as locking spring, to guarantee that locking block main body can be in the effect of elastic force Under move up and down, multiple groups card slot 7 is uniformly distributed along the periphery of bearing outside 3, and card slot 7 group number and latch segment 6 arrange number Amount corresponds, i.e. the corresponding latch segment 6 of every group of card slot 7.

Specifically, as shown in figure 8, the solution lock set includes terminal pad 15 and elastic connection in 15 inner disc of terminal pad Multiple pushing blocks 9 of face circumferential direction, the terminal pad 15 are located in parallel outside the outer end cap 30 of the axle box 2, as shown in Fig. 2,8, outside First through hole and the pushing block 9 on end cap 30 correspond, and one end of the pushing block 9 passes through the first through hole 8 and every The second elastic component 13 is equipped between on the inside of the outer end face of a pushing block 9 and the axle box 2, the second elastic component 13 is preferably back Multiple spring, returning spring are set on pushing block 9, and one end of returning spring is resisted against on the axial flange of pushing block 9, the other end against On the inside of the outer end face of axle box 2, the pushing block 9 is arranged in a one-to-one correspondence with the latch segment 6；It is pushing block 9 by returning spring The restoring force moved back and forth is provided, the length of pushing block 9 needs to guarantee to be enough that latch segment 6 is pushed to be caught in card slot 7.

For the ease of pushing, the outer end of the pushing block 9 is set as inclined surface 11, and the latch segment 6 is equipped with to incline with described The corresponding wedge groove 12 in inclined-plane 11, the inclined surface 11 and wedge groove 12 tilt from bottom to top from outside to inside, when pushing block 9 When inclined surface 11 slides into gradually along wedge groove 12, latch segment 6 is gradually pushed until being caught in card slot 7.

As shown in Figure 10,4 fixing sleeve of latch segment locating ring be set to the axle box 2 in, latch segment locating ring 4 it is interior Opposite sliding occurs for the outer wall of wall and bearing outside 3, avoids and is in contact and wears between bearing outside 3 and axle box 2, To improve the service life of axle box 2；Circumferential the second through-hole 5 and the latch segment 6 of the latch segment locating ring 4 Position is corresponding, and logical equipped with what is corresponded and be connected to second through-hole 5 in the outer end face of the latch segment locating ring 4 Road 10；The channel 10 enters for the pushing block 9, and specifically, when pushing block 9 enters the second through-hole from channel 10, pushing block 9 inclines Inclined-plane 11 is moved along the wedge groove 12 of latch segment 6, and latch segment 6 receives downward pressure and is gradually inserted in card slot 7.

Preferably, the notch edges of the card slot 7 are provided with the first chamfering 23.During practical gauge changing, work as vehicle After spacing adjustment between wheel 18, it is difficult to ensure that latch segment 6 is aligned completely with the notch of card slot 7, it will usually which there are some Deviation, so that latch segment 6 is not easy to be embedded into card slot 7.By the way that the first chamfering 23 is arranged in the notch edges of card slot 7, So that when the alignment between the notch of card slot 7 and latch segment 6 is there are when deviation, under the action of the first chamfering 23,6 energy of latch segment It is enough to be embedded into the card slot 7 along first chamfering 23, and then there are deviations for the notch for solving when latch segment 6 and card slot 7 When, latch segment 6 is not easy to be embedded into the problems in described card slot 7.

Preferably, the bottom of the latch segment 6 is equipped with the second chamfering 24, by the way that the second chamfering 24 is arranged, so that latch segment 6 During being embedded into card slot 7, when being aligned in the presence of centainly inclined between the bottom and the notch of the card slot 7 of latch segment 6 When poor, under the action of the second chamfering 24, the surface of second chamfering 24 is slided with respect to the notch edges of card slot 7, In Under the guiding role of second chamfering 24, embedded block insertion can be embedded in card slot 7.

Wherein, the periphery of the terminal pad 15 is equipped with solution lock end, and the solution lock end is used to be caught in the unlock rail set on ground In 16, the outside for pushing the terminal pad 15 to unlock rail 16 by the through slot 17 in the unlock rail 16 is mobile, to drive The pushing block 9 leaves the latch segment 6, latch segment 6 under the effect of elasticity on be moved away from card slot, unlock is realized, when wheel 18 is taken turns After away from adjustment, the solution lock end of the terminal pad 15 is separated with the through slot 17.As shown in fig. 7, by the way that the unlock is arranged Rail 16, and the through slot 17 is set on the unlock rail 16, so that 15 edge of terminal pad (unlocks when train gauge changing End) it is slid into through slot 17 from arrival end, and the relatively described through slot 17 slides.With moving forward for train, terminal pad 15 is in mistake Section sliding is crossed, so that pushing block 9 is slided towards the direction far from latch segment 6, thus realize unlock, the bearing outside 3 and the lock It opposite can be slided between tight block locating ring 4, thus allow for the adjustment of 18 wheelspan of wheel.When the terminal pad 15 is in gauge changing In section when sliding, 18 wheelspans of wheel are adjusted at this time, after the adjustment of 18 wheelspan of wheel, the terminal pad 15 with it is described Through slot 17 separates, and under the action of the second elastic component 13, pushing block 9 is slided towards the direction close to the latch segment 6 automatically, inserts Enter in channel 10, so that latch segment 6 be driven to be embedded into the card slot 7, realizes between bearing outside 3 and latch segment locating ring 4 Fixation.By the mutual cooperation between through slot 17 and terminal pad 15, realize during the gauge changing of train, bearing outside It is automatically separated between 3 and latch segment locating ring 4 and fixes automatically, hereby it is ensured that gauge changing is more convenient.

Specifically, for the ease of the installation of wheel 18, the axle 19 is equipped with 18 mounting base of wheel, 18 mounting base of wheel Diameter be greater than the diameter of the axle 19, the inner sleeve 20 is stepped, and the big end of the inner sleeve 20 is set in described In 18 mounting base of wheel, the small end of the inner sleeve 20 is set on the axle 19 on the outside of 18 mounting base of wheel；And The length of the inner sleeve 20 is less than the sum of 18 mounting base of wheel and 19 length of axle on the outside of it, and the length being less than is equal to institute Need the half of gauge changing.

Preferably, the bottom of the axle box 2 is provided with support plate 25, and when train gauge changing, the support plate 25 is used In the support axle box 2.

During train realizes gauge changing, in order to enable wheel 18 to move, need that wheel 18 is made to be in outstanding Dummy status, the load of wheel 18 is undertaken by axle box 2 at this time.During axle box 2 undertakes 18 load of wheel, axle box 2 need the supporting rail that is arranged with ground to contact, and relative to supporting rail sliding, still be able to ensure train in gauge changing after It is continuous to move forward.By the way that the support plate 25 is arranged, so that the support plate 25 supports the axle box when train gauge changing 2, and slided relative to supporting rail, it avoids axle box 2 and directly contacts and wear with supporting rail, to extend axle box 2 Service life.In addition, the surface of the support plate 25 is coated with wear-resistant material layer.

As can be seen from the above embodiments, the present invention can in gauge changing mechanism locking assembly, solution lock set and Latch segment provides matched installation space, provides safeguard for wheel to gauge changing, while saving exterior space for bogie.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims

1. a kind of axle box for gauge-changeable wheelsets, which is characterized in that including axle box, along its axial direction from outer in the axle box It is inwardly successively arranged the first annular channel and the second circular passage being connected, the internal diameter in the first annular channel is greater than described The internal diameter of second circular passage, the first annular channel is for installing and the latch segment of its elastic connection, second annular Channel is equipped with the lock being slidably matched with it in latch segment locating ring for installing the latch segment locating ring being interference fitted with it Tight component, the locking assembly with wheel for being fixedly connected with and being slidably mounted in axle, the outer end of the axle box Face is equipped with dismountable outer end cap, and the outer end cap is equipped with the first through hole entered for solution lock set, the latch segment positioning Circle is equipped with the second through-hole passed through for the latch segment, passes through the first through hole by the solution lock set and pushes the lock Tight block is pushed along second through-hole locks the locking assembly, by pushing the solution lock set outside along the first through hole The latch segment is moved away, so that the latch segment, which leaves the locking assembly, realizes unlock.

2. the axle box described in claim 1 for gauge-changeable wheelsets, which is characterized in that the inner face of the axle box, which is equipped with, to be supplied The locking assembly penetrates the third through-hole in the latch segment locating ring；The wheel can be slided by inner sleeve with the axle Dynamic connection, the wheel fixation are set on the inner sleeve, and the locking assembly fixing sleeve is set to the institute of the lateral wheel It states on inner sleeve, and is located in the axle box at the axle both ends, the latch segment elastic connection is described first annular In channel, outer surface the changing direction equipped with multiple card slots along gauge of the locking assembly, the latch segment is in the unlock It is inserted into the card slot under the thrust of component from second through-hole and realizes the locking assembly locking, described in pushing Solution lock set leaves the latch segment along the first through hole, and the latch segment shrinks away from described upwards in the presence of a tensile force Card slot realizes the locking assembly unlock.

3. the axle box according to claim 1 for gauge-changeable wheelsets, which is characterized in that the first annular channel it is interior Wall is equipped with the sliding groove axially extended, and the sliding groove is in small, slot bottom the is big T-type or dovetail groove profile of being open；The latch segment Including locking block main body and the sliding shoe to match with the sliding groove, the latch segment is mounted on described by the sliding shoe In sliding groove, connected between the sliding shoe and the locking block main body by the first elastic component.

4. the axle box according to claim 2 for gauge-changeable wheelsets, which is characterized in that the inner circumferential of the inner sleeve is equipped with Internal spline, the both ends of the axle are respectively equipped with the external splines to match with the internal spline, the inner sleeve and the axle It is connect by the internal spline with external splines.

5. the axle box according to claim 2 for gauge-changeable wheelsets, which is characterized in that the locking assembly includes bearing And bearing outside, the inner ring of the bearing are fitted on the inner sleeve, the bearing outside is fitted in the outer ring of the bearing, Clearance fit between the bearing outside and the latch segment locating ring；The peripheral distribution of the bearing outside has card described in multiple groups Slot, card slot described in every group include the card slot that multiple axially spaced-aparts along the bearing outside are arranged, and the distance at interval is equal to The half of required gauge changing.

6. the axle box according to claim 5 for gauge-changeable wheelsets, which is characterized in that the latch segment is along the axle box The inner circumferential in the first annular channel of body is uniformly arranged, and card slot described in multiple groups is uniformly distributed along the periphery of the bearing outside.

7. the axle box according to claim 1 for gauge-changeable wheelsets, which is characterized in that the solution lock set includes connection The pushing block of disk and elastic connection the disk circumferential direction in the terminal pad, the terminal pad are located at the outer end cap of the axle box Outside, the first through hole on the outer end cap and the pushing block correspond, the pushing block pass through the first through hole and The second elastic component is equipped between on the inside of each pushing block and the outer end cap, the pushing block is set with latch segment one-to-one correspondence It sets.

8. the axle box according to claim 7 for gauge-changeable wheelsets, which is characterized in that outside the latch segment locating ring End face is equipped with the channel for corresponding and being connected to second through-hole, and the channel enters for the pushing block, and promotion is located at Latch segment in second through-hole.

9. the axle box according to claim 7 for gauge-changeable wheelsets, which is characterized in that the outer end of the pushing block is set as Inclined surface, the latch segment are equipped with wedge groove corresponding with the inclined surface, and the inclined surface and wedge groove are from extroversion Inside tilt from bottom to top.

10. the axle box according to claim 7 for gauge-changeable wheelsets, which is characterized in that the periphery of the terminal pad is set There is Xie Suoduan, the solution lock end is for being caught in the unlock rail on ground, by described in the through slot promotion in the unlock rail The outside of terminal pad to unlock rail is mobile, so that the pushing block be driven to leave the latch segment, is unlocked.

11. -10 described in any item axle boxes for gauge-changeable wheelsets according to claim 1, which is characterized in that the axle box Bottom be equipped with support plate, wear-resistant material is coated in the support plate.