CN210195533U - Rail transfer device and sliding door rail transfer mechanism - Google Patents

Abstract

The utility model belongs to the technical field of the house, a become rail device and move a rail mechanism, including becoming the rail seat, the both ends of becoming the rail seat symmetry all stretch out and draw back and slide and be provided with second orbital transfer, slide between two second orbital transfer and be provided with first orbital transfer, second orbital transfer parallel arrangement have solved the technical problem that current track transform equipment is complicated.

Description

Rail transfer device and sliding door rail transfer mechanism

Technical Field

The utility model belongs to the technical field of the house, a become rail device and move a rail mechanism is related to.

Background

At present, the multi-rail overlapping sliding door in the market is widely applied, but each door leaf of the multi-rail overlapping sliding door is not on the same rail after being closed, so that the air tightness of the whole door is poor, and the doors on different planes are not attractive, and the visual effect is influenced.

Patent No. CN201720800141.0, with patent names: the utility model discloses a become utility model patent of rail push-and-pull door discloses a can change orbital push-and-pull door, this patent set up with the crossing track of current track one end, realize the push-and-pull door through complicated equipment such as motor, inductor and change original track to slide in a track through the pulley. However, the device used in the patent is complex, needs a plurality of controller inductors, and has high cost, easy damage and short service life.

SUMMERY OF THE UTILITY MODEL

The utility model provides a become rail device and move a rail mechanism has solved the complicated technical problem of above-mentioned track transform equipment.

The technical scheme of the utility model is realized like this:

a rail transfer device and a sliding door rail transfer mechanism comprise:

the two symmetrical ends of the rail changing seat are provided with second rail changing rails in a telescopic sliding mode, a first rail changing rail is arranged between the second rail changing rails in a sliding mode, and the first rail changing rail and the second rail changing rails are arranged in parallel.

As a further technical scheme, a track transfer slide bar is arranged on the track transfer seat, the first track transfer rail and the second track transfer rail are clamped on the track transfer slide bar, and the track transfer slide bar is perpendicular to the first track transfer rail.

As a further technical scheme, grooves are arranged at the bottoms of the first track transfer rail and the second track transfer rail and clamped on the track transfer sliding rods.

As a further technical scheme, a plurality of round balls are arranged in the grooves, and the grooves are in contact with the track-changing sliding rods through the round balls.

As a further technical scheme, the number of the track transfer sliding rods is two, and the track transfer sliding rods are arranged on the track transfer seat in parallel.

As a further technical scheme, an arc-shaped groove is formed in the rail changing seat, arc-shaped protrusions clamped in the arc-shaped groove after sliding are arranged below the first rail changing rail and the second rail changing rail, and the arc-shaped protrusions are connected with the lower surfaces of the first rail changing rail and the second rail changing rail through clamping springs.

As a further technical scheme, a baffle is arranged in parallel on one side, away from the first orbital transfer track, of the second orbital transfer track, a limiting spring is arranged on the baffle, and two ends of the limiting spring are connected with the baffle and the second orbital transfer track respectively.

As a further technical scheme, the limiting spring is arranged between the two track-changing sliding rods.

As a further technical scheme, the number of the limiting springs is two, and the limiting springs are arranged on one side, close to the edge of the track changing seat, of the track changing slide rod in parallel.

The utility model provides a move a door and become rail mechanism, includes the device of becoming the rail, still includes two at least track groups, it sets up two adjacent to become the rail between the group, the track group includes two fixed tracks that are parallel to each other, fixed track with first track of becoming the rail is parallel, first track of becoming become the rail or second become the rail slip back with the fixed track collineation.

As a further technical scheme, a door leaf is slidably disposed on the fixed track and the first or second orbital transfer tracks collinear with the fixed track, two pulleys are disposed at the bottom of the door leaf, the pulleys slide along the fixed track, the first orbital transfer or the second orbital transfer, and the diameters of the pulleys are equal to the lengths of the first and second orbital transfer.

As a further technical solution, the bottom of the door leaf has two pulleys in total.

As a further technical solution, the track group and the track-changing device are provided right above and corresponding to the track group and the track-changing device, and the top of the door leaf is provided with two pulleys in the track group and the track-changing device which slide above.

As a further technical scheme, the track group is correspondingly arranged right above the track group, a direction-changing slide way is arranged between two adjacent fixed tracks above the track group, the direction-changing slide way is arranged right above the track-changing device, two ends of the direction-changing slide way are respectively communicated with the two fixed tracks,

the top of the door leaf is provided with a fixture block, one end of the turning slideway, which faces the door leaf, is provided with a clamping plate, and the fixture block slides in the fixed track or the clamping plate.

Compared with the prior art, the utility model discloses theory of operation and beneficial effect do:

1. the utility model discloses in, the device of becoming rail is used for moving door leaf or the window fan that slides on a track to another parallel track. Become the rail seat and play the effect of supporting and placing other parts, first rail track slip sets up on becoming the rail seat, and first rail track all is provided with the second rail track that becomes along length direction's both sides, and first rail track that becomes and second rail track are all parallel, and its slip direction is perpendicular rather than length direction moreover. The second orbital transfer track can be extended and retracted along a direction perpendicular to the length direction of the second orbital transfer track. During initial state, the second orbital transfer of one end is compressed by the extrusion of first orbital transfer, and the object can slide through first orbital transfer, and when needs orbital transfer, the object slides on first orbital transfer, and first orbital transfer slides to the other end, and the second orbital transfer stretched out this moment, replaces first orbital transfer to realize the slip of object and passes through. When the first orbital transfer slides to the second orbital transfer at the other end, the second orbital transfer is extruded to be collinear with the original orbital transfer of the second orbital transfer, and the second orbital transfer at the other end is replaced for the object to slide through, so that the orbital transfer of the object on the first orbital transfer is realized.

2. The utility model discloses in, the circle of derail slide bar for removing a small part, the central angle that its cross-section girth corresponds is greater than 180 degrees, the derail slide bar provides first derail track, the gliding track of second derail track, derail slide bar and first derail track, the perpendicular setting of second derail track, first derail track, be provided with curved recess on the orbital bottom surface of second derail, because the central angle that derail slide bar cross-section girth corresponds is greater than 180 degrees, the recess card is on the derail slide bar, make first derail track, the second derail track can not roll-off easily, play fixed effect.

3. The utility model discloses in, because first orbital transfer, second orbital transfer length all are much greater than the diameter of orbital transfer slide bar, consequently set up two orbital transfer slide bars and can avoid first orbital transfer, second orbital transfer horizontal hunting to lead to unstablely when sliding.

4. The utility model discloses in, the upper surface at the both ends of becoming the rail seat all is provided with the arc recess, and first orbital, the orbital lower surface of second orbital all is provided with the arc arch that corresponds with the arc recess, and when first orbital or the orbital arc recess department that slides of second orbital, spring release compressive force, arc protruding card go into in the arc recess, first orbital or the orbital second of second orbital transfer just is fixed in this position.

5. The utility model discloses in, the both ends of becoming the rail seat all are provided with the baffle, the baffle is parallel with first orbital transfer, be provided with spacing spring between two orbital transfer slide bars, baffle and the orbital lateral wall of second orbital transfer are connected respectively at its both ends, card back in the arc recess of one end after first orbital transfer slides, spacing spring with the second orbital transfer of this end is compressed, when sliding the other end along the orbital transfer slide bar with pushing away first orbital transfer, the spacing spring of compressed resets, it slides and blocks into in the arc recess along the orbital transfer slide bar to drive second orbital transfer.

6. The utility model discloses in, move a rail transfer mechanism and be used for sliding similar house things such as push-and-pull door, casement or cabinet door from a track and slide and change the way to another track, can realize opening of push-and-pull door through becoming the rail, ventilate, perhaps close, a plurality of door leafs can become the rail to a track on to be located same plane, compare in current push-and-pull door structure more pleasing to the eye.

Move a rail mechanism and include the door leaf, trapped orbit and orbital device of becoming, the orbital device of becoming sets up between two adjacent trapped orbits, the trapped orbit holds the door leaf, the door leaf can slide on the trapped orbit, when the orbital device department of becoming of process, if do not need the rail of becoming, first orbital track of becoming and second orbital track of becoming can play the effect the same with the trapped orbit, supply the door leaf to slide and pass through, if need the rail of becoming, the door leaf slides orbital device department of becoming, and through the orbital slip of first becoming of becoming the rail and the orbital flexible realization door leaf place track transposition of second becoming the rail.

When the rail is not changed, the first rail-changing track and the second rail-changing track are clamped at two arc-shaped grooves at two ends of a rail-changing seat and are respectively collinear with the two fixed tracks, and the door leaf slides on the tracks; when the rail is changed, the door leaf slides to the first rail changing track of the rail changing device and slides to be collinear with the other track, and the door leaf can freely slide on the fixed track and the first rail changing track.

7. The utility model discloses in, the door leaf bottom is provided with the pulley, and the pulley slides on the track, and the pulley can reduce the friction, makes to slide more smoothly, when needing the derail, and the pulley slides on first derail track to slide other end department along the derail slide bar, extrude second derail track, the door leaf slides along the trapped orbit direction again, and the trapped orbit that can break away from this end slides on the trapped orbit of the other end. The diameter of pulley equals with first orbital length of becoming rail, can reduce the area of becoming the rail device, reduces consumptive material reduce cost.

8. The utility model discloses in, the bottom of a door leaf is provided with two pulleys, and on the one hand, the door leaf leans on two pulleys to slide on the fixed track, and is more stable, and on the other hand, when needs derail, a pulley corresponds a derail device, and two pulleys slide respectively on two first tracks and the perpendicular fixed track slides, and two sliding fulcrums can make the slip process more stable smooth and easy.

9. The utility model discloses in, the first embodiment of slide above the door leaf is, also is provided with track group and device of becoming the rail at the top of door leaf, and is the same with the track group and the device of becoming the rail of door leaf bottom, supplies the vertical setting, the fixed and the slip of door leaf.

10. The utility model discloses in, another embodiment of slide above the door leaf is, and the door leaf top is provided with the track group that corresponds rather than bottom track group, is provided with the diversion slide directly over the device of trading the rail, and the diversion track is perpendicular with the trapped orbit, and during the door leaf got into the diversion slide after sliding on the trapped orbit, the door leaf top was provided with the fixture block, and the fixture block slides and sets up in trapped orbit and first orbit, second orbit. The fixture block is cylindrical, and the diversion slide is C shape channel-section steel, is provided with the cardboard rather than the lateral wall vertically on the diversion slide, and the cardboard constitutes the recess with the diversion slide, makes the fixture block slide in the recess, can avoid sliding in-process roll-off track.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic top view of the track-changing device of the present invention;

fig. 2 is a perspective structural schematic view of the middle rail-changing device a of the present invention;

fig. 3 is a perspective structural diagram of a second embodiment of a middle rail-changing device a of the present invention;

FIG. 4 is a schematic structural diagram of the limiting spring in this embodiment in two cases;

fig. 5 is a schematic view of the structure of the middle rail-changing device of the present invention cooperating with the fixed rail;

FIG. 6 is a schematic view of the structure of the middle transformer device of the present invention cooperating with the fixed rail when two middle transformer devices are provided;

FIG. 7 is a schematic view of the structure of the four middle transformer devices of the present invention cooperating with the fixed rail;

fig. 8 is a schematic front view of a first embodiment of a slide rail above a middle door leaf of the present invention;

fig. 9 is a schematic front view of a second embodiment of a slide rail above a middle door leaf according to the present invention;

fig. 10 is a schematic cross-sectional view of a second embodiment of a sliding track above a middle door leaf according to the present invention;

in the figure: the track comprises a track group 1, a fixed track 11, a door leaf 2, a pulley 21, a track-changing device 3, a track-changing seat 31, a first track-changing track 32, a track-changing slide rod 33, a groove 34, a second track-changing track 35, a clamping spring 37, an arc-shaped bulge 38, an arc-shaped groove 39, a baffle 4, a limiting spring 5, a direction-changing slideway 8 and a clamping plate 81.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-10, the present invention provides an orbital transfer device, including:

the two symmetrical ends of the rail changing seat 31 are provided with second rail changing rails 35 in a telescopic sliding mode, a first rail changing rail 32 is arranged between the two second rail changing rails 35 in a sliding mode, and the first rail changing rail 32 and the second rail changing rails 35 are arranged in parallel.

In this embodiment the device 3 is used to move a door leaf 2 or window leaf sliding on one track to another parallel track. The derail seat 31 plays a role in supporting and placing other components, the first derail rail 32 is arranged on the derail seat 31 in a sliding mode, the second derail rails 35 are arranged on the two sides of the first derail rail 32 along the length direction, the first derail rail 32 and the second derail rails 35 are parallel, and the sliding direction of the first derail rail is perpendicular to the length direction of the first derail rail. The second orbital transfer track 35 is capable of telescoping in a direction perpendicular to its own length. In the initial state, the second orbital transfer track 35 at one end is compressed by the first orbital transfer track 32, and the object can slide through the first orbital transfer track 32, and when orbital transfer is required, the object slides onto the first orbital transfer track 32, and the first orbital transfer track 32 slides to the other end, and at the moment, the second orbital transfer track 35 extends out to replace the first orbital transfer track 32 to realize the sliding of the object. When the first orbital transfer track 32 slides to the second orbital transfer track 35 at the other end, the second orbital transfer track 35 is extruded and then is collinear with the original track of the second orbital transfer track 35, and the second orbital transfer track 35 at the other end is replaced for the object to slide through, so that the object on the first orbital transfer track 32 can be switched.

Furthermore, a track transfer slide bar 33 is arranged on the track transfer base 31, the first track transfer rail 32 and the second track transfer rail 35 are clamped on the track transfer slide bar 33, and the track transfer slide bar 33 is perpendicular to the first track transfer rail 32.

In this embodiment, the track-changing slide bar 33 is a circle with a small part removed, a central angle corresponding to a perimeter of a cross section of the track-changing slide bar is greater than 180 degrees, the track-changing slide bar 33 provides a slide track for the first track-changing track 32 and the second track-changing track 35, the track-changing slide bar 33 is perpendicular to the first track-changing track 32 and the second track-changing track 35, and the bottom surfaces of the first track-changing track 32 and the second track-changing track 35 are provided with arc-shaped grooves 34, so that the first track-changing track 32 and the second track-changing track 35 cannot easily slide out due to the fact that the central angle corresponding to the perimeter of the cross section of the track-changing slide bar 33 is greater than 180 degrees and the grooves 34 are clamped on the track-changing slide bar 33, thereby.

Further, the bottoms of the first track transfer rail 32 and the second track transfer rail 35 are provided with grooves 37, and the grooves 37 are clamped on the track transfer slide bars 33.

Further, a plurality of balls 36 are arranged on the inner wall of the groove 34, and the groove 34 is in contact with the track-changing sliding rod 33 through the balls 36.

In this embodiment, the ball is disposed in the groove 34, and the ball contacts the track-changing slide bar 33, so that friction between the first track-changing rail 32, the second track-changing rail 35, and the track-changing slide bar 33 can be reduced, and the sliding is smoother.

Further, the track changing slide bars 33 are arranged on the track changing base 31 in parallel.

In this embodiment, since the lengths of the first track transfer rail 32 and the second track transfer rail 35 are much larger than the diameter of the track transfer slide bar 33, the two track transfer slide bars 33 can prevent the first track transfer rail 32 and the second track transfer rail 35 from swinging left and right during sliding to cause instability.

Further, be provided with arc recess 39 on the orbital transfer seat 31, first orbital transfer 32, the below of second orbital transfer 35 all is provided with the arc arch 38 of card in arc recess 39 after sliding, and the arc arch is connected with the lower surface of first orbital transfer 32, second orbital transfer 35 through screens spring 37.

In this embodiment, the upper surfaces of the two ends of the rail transfer base 31 are provided with arc-shaped grooves 34, the lower surfaces of the first rail transfer rail 32 and the second rail transfer rail 35 are provided with arc-shaped protrusions 38 corresponding to the arc-shaped grooves 34, when the first rail transfer rail 32 or the second rail transfer rail 35 slides to the arc-shaped grooves 34, the clamping spring 37 releases the compression force, the arc-shaped protrusions 38 are clamped into the arc-shaped grooves 34, and the first rail transfer rail 32 or the second rail transfer rail 35 is fixed at the position.

Further, one side of the second orbital transfer track 35, which is far away from the first orbital transfer track 32, is provided with a baffle 4 in parallel, a limiting spring 5 is arranged on the baffle 4, and two ends of the limiting spring 5 are respectively connected with the baffle 4 and the second orbital transfer track 35.

In this embodiment, both ends of the orbital transfer seat 31 all are provided with baffle 4, baffle 4 is parallel with first orbital transfer 32, be provided with spacing spring 5 between two orbital transfer slide bars 33, the lateral wall of baffle 4 and second orbital transfer 35 is connected respectively at its both ends, after first orbital transfer 32 slides the back card in the arc recess 34 of one end, spacing spring 5 of being connected with the second orbital transfer 35 of this end is compressed, when sliding the other end along orbital transfer slide bar 33 with pushing away first orbital transfer 32, compressed spacing spring 5 resets, drive second orbital transfer 35 and slide and block in the arc recess 34 along orbital transfer slide bar 33.

As a further technical solution, the limit spring 5 is disposed between the two track changing sliding rods 33.

As a further technical solution, the number of the limiting springs 5 is two, and the two limiting springs are arranged in parallel on one side of the track-changing slide bar 33 close to the edge of the track-changing seat 31.

In this embodiment, one limiting spring 5 is disposed between the two track-changing sliding rods 33, and one end of the limiting spring is connected to the center of the side wall of the second track-changing rail 35, so that the second track-changing rail 35 can extend and retract. Spacing spring 5 sets up two, and the symmetry sets up on the lateral wall of second becomes rail track 35, can make flexible more stable.

A sliding door track-changing mechanism comprises a track-changing device 3 and at least two track groups 1, the track-changing device 3 is arranged between two adjacent track groups 1,

the track group 1 comprises two fixed tracks 11 which are parallel to each other, the fixed tracks 11 are perpendicular to the track-changing sliding rods 33, the first track-changing track 32 or the second track-changing track 35 slides to be collinear with the fixed tracks 11,

in this embodiment, move a rail mechanism and be used for changing the track to another track with similar house articles such as push-and-pull door, casement or cabinet door from a track slip, can realize opening of push-and-pull door through the change rail, ventilate, perhaps close, a plurality of door leafs 2 can become on the track to lie in same plane, compare in current push-and-pull door structure more pleasing to the eye.

In this embodiment, move a rail transfer mechanism and include door leaf 2, fixed track 11 and orbital transfer device 3, orbital transfer device 3 sets up between two adjacent fixed track 11, fixed track 11 holds door leaf 2, door leaf 2 can slide on fixed track 11, when the orbital transfer device 3 department, if need not become the rail, first orbital transfer 32 and second orbital transfer 35 can play the effect the same with fixed track 11, supply door leaf 2 to slide to pass through, if need become the rail, door leaf 2 slides orbital transfer device 3 department, and realize the track transposition of door leaf 2 place through the slip of first orbital transfer 32 and the flexible of second orbital transfer 35 of becoming the rail.

In this embodiment, when the track is not changed, the first track transfer rail 32 and the second track transfer rail 35 are clamped at the two arc-shaped grooves 34 at the two ends of the track transfer seat 31 and are respectively collinear with the two fixed rails 11, and the door leaf 2 slides on the rails; when the track is changed, the pulley 21 at the bottom of the door leaf 2 slides onto the first track 32 of the track changing device 3, slides along the track changing slide bar 33 and slides to the position which is collinear with the other track, the arc-shaped bulge 38 at the bottom of the track is clamped into the arc-shaped groove 34 at the other end, the door leaf 2 enters the fixed track 11, and the door leaf 2 can freely slide on the fixed track 11 and the first track 32.

Further, the door leaves 2 are arranged on the fixed track 11 and the first track-changing track 32 or the second track-changing track 35 which are collinear with the fixed track 11 in a sliding mode, the number of the door leaves 2 is at least two, pulleys 21 are arranged at the bottom of the door leaves 2, the pulleys 21 slide along the fixed track 11, the first track-changing track 32 or the second track-changing track 35, and the diameters of the pulleys 21 are equal to the length of the first track-changing track 32 and the length of the second track-changing track 35.

In this embodiment, the bottom of the door leaf 2 is provided with the pulley 21, the pulley 21 slides on the rail, the pulley 21 can reduce friction, so that the sliding is smoother, when the rail change is required, the pulley 21 slides on the first rail change track 32, slides to the other end along the rail change slide bar 33, and extrudes the second rail change track 35, and the door leaf 2 slides along the direction of the fixed track 11, so that the fixed track 11 which can be separated from the end slides on the fixed track 11 at the other end. The diameter of the pulley 21 is equal to the length of the first orbital transfer track 32, so that the occupied area of the orbital transfer device 3 can be reduced, the consumables can be reduced, and the cost can be reduced.

Further, the bottom of the door leaf 2 has two pulleys 21.

In this embodiment, the bottom of one door leaf 2 is provided with two pulleys 21, and on the one hand, the door leaf 2 leans on two pulleys 21 to slide on the fixed track 11, and is more stable, and on the other hand, when needing the derailment, a pulley 21 corresponds a derailment device 3, and two pulleys 21 slide respectively on two first tracks and the perpendicular fixed track 11 slides, and two sliding fulcrums can make the slip process more stable smooth and easy.

Further, the track group 1 and the track-changing device 3 are arranged right above and corresponding to the track group 1 and the track-changing device 3, and the top of the door leaf 2 is provided with two pulleys 21 sliding on the upper track group 1 and the track-changing device 3.

In this embodiment, the first embodiment of the sliding way above the door leaf 2 is that the top of the door leaf 2 is also provided with a track group 1 and a track transfer device 3, which are the same as the track group 1 and the track transfer device 3 at the bottom of the door leaf 2, so as to allow the door leaf 2 to be vertically arranged, fixed and slide.

Further, a track group 1 is correspondingly arranged right above the track group 1, a direction-changing slideway 8 is arranged between two adjacent fixed tracks 11 positioned above the track group 1, the direction-changing slideway 8 is arranged right above the track-changing device 3, two ends of the direction-changing slideway 8 are respectively communicated with the two fixed tracks 11,

the top of door leaf 2 is provided with fixture block 22, and the one end that the diversion slide 8 faced the door leaf is provided with cardboard 81, and fixture block 22 slides in fixed track 11 or cardboard 81.

In this embodiment, another embodiment of the slide above the door leaf 2 is that a track group 1 corresponding to the track group 1 at the bottom of the door leaf 2 is arranged above the door leaf 2, a direction-changing slide 8 is arranged right above the track-changing device, the direction-changing slide is perpendicular to the fixed track 11, the door leaf 2 slides on the fixed track 11 and then enters the direction-changing slide 8, and a fixture block is arranged at the top of the door leaf 2 and is arranged in the fixed track 11, the first track-changing track 32 and the second track-changing track 35 in a sliding manner. The fixture block is cylindrical, and diversion slide 8 is the C shape channel-section steel, is provided with on the diversion slide 8 rather than lateral wall vertically cardboard 81, and cardboard 81 constitutes recess 34 with diversion slide 8, makes the fixture block slide in recess 34, can avoid the slip in-process roll-off track.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a become rail device (3), its characterized in that includes becomes rail seat (31), the both ends that become rail seat (31) symmetry are all flexible to slide and are provided with second becomes rail way (35), two it is provided with first become rail way (32) to slide between second becomes rail way (35), first become rail way (32) second becomes rail way (35) parallel arrangement.

2. The device according to claim 1, characterized in that a track transfer slide (33) is arranged on the track transfer base (31), the first track transfer rail (32) and the second track transfer rail (35) are clamped on the track transfer slide (33), and the track transfer slide (33) is perpendicular to the first track transfer rail (32).

3. A device according to claim 2, characterized in that said transfer bars (33) are provided in total two and parallel to said transfer base (31).

4. The rail transfer device according to claim 1, wherein an arc-shaped groove (39) is formed in the rail transfer seat (31), arc-shaped protrusions (38) which slide and are clamped in the arc-shaped groove (39) are arranged below the first rail transfer rail (32) and the second rail transfer rail (35), and the arc-shaped protrusions are connected with the lower surfaces of the first rail transfer rail (32) and the second rail transfer rail (35) through clamping springs (37).

5. The rail transfer device according to claim 1, wherein a baffle (4) is arranged in parallel on one side of the second rail transfer track (35) far away from the first rail transfer track (32), a limiting spring (5) is arranged on the baffle (4), and two ends of the limiting spring (5) are respectively connected with the baffle (4) and the second rail transfer track (35).

6. A sliding door track-changing mechanism comprising a track-changing device (3) according to any one of claims 1-5, characterized in that it further comprises at least two track sets (1), said track-changing device (3) being arranged between two adjacent track sets (1),

the track set (1) comprises two fixed tracks (11) which are parallel to each other, the fixed tracks (11) are parallel to the first track transfer tracks (32), and the first track transfer tracks (32) or the second track transfer tracks (35) are collinear with the fixed tracks (11) after sliding.

7. A sliding door track-changing mechanism according to claim 6, characterized in that a door leaf (2) is slidably disposed on the fixed track (11) and the first track (32) or the second track (35) collinear with the fixed track, at least two door leaves (2) are disposed on the bottom of the door leaf (2), the pulley (21) slides along the fixed track (11), and the diameter of the pulley (21) is equal to the length of the first track (32) and the length of the second track (35).

8. A sliding door track-changing mechanism according to claim 7, characterized in that the bottom of the door leaf (2) has two pulleys (21).

9. Sliding door track-changing mechanism according to claim 8, characterized in that the track group (1) and the track-changing device (3) are arranged right above and corresponding to the track group (1) and the track-changing device (3), and the top of the door leaf (2) is provided with two pulleys (21) sliding above in the track group (1) and the track-changing device (3).

10. The sliding door track-changing mechanism according to claim 8, characterized in that the track group (1) is arranged right above the track group (1) and corresponding thereto, a direction-changing slideway (8) is arranged between two adjacent fixed tracks (11) above the track group, the direction-changing slideway (8) is arranged right above the track-changing device (3), two ends of the direction-changing slideway (8) are respectively communicated with the two fixed tracks (11),

the top of the door leaf (2) is provided with a clamping block (22), one end, facing the door leaf, of the direction-changing slide way (8) is provided with a clamping plate (81), and the clamping block (22) slides in the fixed track (11) or the clamping plate (81).

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