Variable wheelbase mechanism and bogie

Abstract

The present invention relates to the technical field of suspended rail transit, and in particular to a variable wheelbase mechanism and a bogie, which are intended to solve the problem of insufficient contact between the running wheels and the running boards when the train runs on tracks of different widths. The variable wheelbase mechanism provided by the present invention includes a running wheel, a sliding shaft, a power shaft and a lever assembly; the running wheel is mounted on one end of the sliding shaft, and the end of the sliding shaft away from the running wheel is sleeved on the power shaft; the sliding shaft can move along the axial direction of the power shaft and drive the running wheel to move along the axial direction of the power shaft; the power shaft rotates around its own axis to drive the sliding shaft to rotate, and then drive the running wheel to rotate. The variable wheelbase mechanism provided by the present invention drives the sliding shaft to move along the axial direction of the power shaft through the lever assembly to drive the running wheel to move along the axial direction of the power shaft, thereby adjusting the position of the running wheel perpendicular to the forward direction to adapt to changes in track width and avoid insufficient contact between the running wheel and the track.

Description

Technical Field

[0001] The invention relates to the technical field of suspended rail transportation, and in particular to a variable wheelbase mechanism and a bogie. Background Art

[0002] In combination with the current needs of suspended monorails and the different carrying capacities in rail transit design plans, the bogies and track beams will also be adjusted differently. In actual operation, vehicles with different carrying capacities need to change tracks repeatedly in operating lines of different specifications. Since the wheelbase of the bogie is constant, the spacing of the running wheels is constant, and the running wheel spacing can only be designed according to the narrowest track. The running board of the track is used to carry the running wheels. When running on a wider track, it is easy for the running board to partially contact the running wheels, that is, the running wheels cantilever out of the edge of the running board, and the connecting parts of the bogie and the car body collide with the running board due to lateral displacement, causing damage. Summary of the invention

[0003] The object of the present invention is to provide a variable wheelbase mechanism and a bogie to solve the problem of insufficient contact between running wheels and running boards when a train runs on tracks of different widths.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0005] A wheelbase changing mechanism comprises a walking wheel, a sliding shaft, a power shaft and a lever assembly; the walking wheel is mounted on one end of the sliding shaft, and the end of the sliding shaft away from the walking wheel is sleeved on the power shaft; the sliding shaft can move along the axial direction of the power shaft and drive the walking wheel to move along the axial direction of the power shaft; the power shaft rotates around its own axis to drive the sliding shaft to rotate, and then drives the walking wheel to rotate; the lever assembly is clamped on the sliding shaft, and is used to drive the sliding shaft to move along the axial direction of the power shaft.

[0006] Furthermore, the wheelbase changing mechanism also includes a shifting rod assembly; the shifting rod assembly includes a shifting block, which is clamped on the sliding shaft; the shifting block can move in a direction parallel to the axis of the power shaft.

[0007] Furthermore, a circular annular boss is arranged on the sliding shaft, a clamping groove is opened on the shifting block, and the circular annular boss is clamped in the clamping groove.

[0008] Furthermore, the shifting rod assembly also includes a first guide rail, which is parallel to the axis of the power shaft; the shifting block is slidably connected to the first guide rail and can move along the length direction of the first guide rail.

[0009] Furthermore, the shifting rod assembly also includes a swing rod and a push block; one end of the swing rod is hinged to the shifting block, and the other end is hinged to the push block; the push block can move in a direction perpendicular to the first guide rail.

[0010] Furthermore, the lever assembly also includes a second guide rail, which is perpendicular to the first guide rail; the push block is slidably connected to the second guide rail and can move along the length direction of the second guide rail.

[0011] Furthermore, the lever assembly also includes a telescopic push rod, the protruding end of which is connected to the push block and is used to drive the push block to move along the second guide rail.

[0012] Furthermore, the lever assembly also includes a limit block, which is installed on the first guide rail and is used to limit the distance that the lever block moves along the length direction of the first guide rail.

[0013] Another aspect of the present invention provides a variable wheelbase bogie, comprising the variable wheelbase mechanism described above.

[0014] Furthermore, the variable wheelbase bogie also includes a guide frame, which is installed on the variable wheelbase mechanism; the variable wheelbase mechanism also includes a base, and the sliding shaft and the power shaft are rotatably connected to the base; a support plate is provided on the base, and the lower surface of the guide frame abuts against the upper surface of the support plate; the guide frame includes a guide wheel; the guide wheel abuts against the side wall of the track and is configured to be displaced perpendicular to the forward direction of the guide frame.

[0015] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:

[0016] The wheelbase changing mechanism provided by the present invention comprises a walking wheel, a sliding shaft, a power shaft and a lever assembly; the walking wheel is installed at one end of the sliding shaft, and the end of the sliding shaft away from the walking wheel is sleeved on the power shaft; the sliding shaft can move along the axial direction of the power shaft and drive the walking wheel to move along the axial direction of the power shaft; the power shaft rotates around its own axis to drive the sliding shaft to rotate, and then drives the walking wheel to rotate; the lever assembly is clamped on the sliding shaft, and is used to drive the sliding shaft to move along the axial direction of the power shaft.

[0017] The variable wheelbase mechanism provided by the present invention drives the sliding shaft to rotate through the rotation of the power shaft, and then drives the running wheel to rotate to drive the train forward. The sliding shaft is driven to move along the axis direction of the power shaft through the lever assembly to drive the running wheel to move along the axis direction of the power shaft, thereby adjusting the position of the running wheel perpendicular to the forward direction to adapt to the change in the track width and avoid insufficient contact between the running wheel and the track. At the same time, by changing the position of the running wheel, the running wheel can be close to the edge of the track to prevent the bogie from moving too far to one side, resulting in the problem of damage caused by collision between the connecting parts of the bogie and the car body and the running board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the variable wheelbase mechanism provided by an embodiment of the present invention;

[0020] Figure 2 Top view of the variable wheelbase mechanism provided by an embodiment of the present invention;

[0021] Figure 3 Structural schematic diagram of the lever assembly;

[0022] Figure 4 Structural schematic diagram of the bogie provided by an embodiment of the present invention;

[0023] Figure 5 Structural schematic diagram of the guide frame;

[0024] Figure 6 Schematic diagram of the track.

[0025] Icons: 100 - running wheel; 200 - sliding shaft; 300 - power shaft; 400 - lever assembly; 500 - base; 600 - mounting seat; 210 - circular ring boss; 410 - dial block; 420 - first guide rail; 430 - swing rod; 440 - push block; 450 - second guide rail; 460 - telescopic push rod; 470 - limit block; 510 - support plate; 20 - guide frame; 21 - guide wheel; 22 - swing arm; 23 - telescopic swing rod; 24 - frame body; 24a - connecting column; 24b - limit baffle; 31 - top plate; 32 - side wall; 33 - running plate. Specific Embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0028] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] When the train enters a wide track from a narrow track, it is easy for the running board 33 to partially contact the running wheel 100, that is, the running wheel 100 protrudes out of the edge of the running board 33, and the connecting parts of the bogie and the car body collide with the running board 33 due to lateral displacement, causing damage.

[0030] In view of this, the present invention provides a variable wheelbase mechanism, including a walking wheel 100, a sliding shaft 200, a power shaft 300 and a lever assembly 400; the walking wheel 100 is installed at one end of the sliding shaft 200, and the end of the sliding shaft 200 away from the walking wheel 100 is sleeved on the power shaft 300; the sliding shaft 200 can move along the axial direction of the power shaft 300 and drive the walking wheel 100 to move along the axial direction of the power shaft 300; the power shaft 300 rotates around its own axis to drive the sliding shaft 200 to rotate, and then drive the walking wheel 100 to rotate; the lever assembly 400 is clamped on the sliding shaft 200, and is used to drive the sliding shaft 200 to move along the axial direction of the power shaft 300.

[0031] The variable wheelbase mechanism provided by the present invention drives the sliding shaft 200 to rotate to drive the sliding shaft 200 to rotate, and then drives the running wheel 100 to rotate to drive the train forward. The sliding shaft 200 moves along the axial direction of the power shaft 300 to drive the running wheel 100 to move along the axial direction of the power shaft 300, thereby adjusting the position of the running wheel 100 perpendicular to the forward direction to adapt to the change in the track width and avoid insufficient contact between the running wheel 100 and the track. At the same time, by changing the position of the running wheel 100, the running wheel 100 can be close to the edge of the track to prevent the bogie from moving too far to one side, resulting in the connection between the bogie and the car body colliding with the running board 33 and causing damage.

[0032] The following combination Figures 1 - 6 The structure and shape of the variable wheelbase mechanism provided in this embodiment are described in detail:

[0033] The track cross section in this embodiment is a C-shape with an opening downward. Figure 6 As shown, the track includes a horizontally arranged top plate 31 , two side walls 32 vertically connected to the bottom of the top plate 31 , and two walking plates 33 respectively connected to the bottom of the side walls 32 horizontally.

[0034] In an optional solution of this embodiment, the wheelbase changing mechanism includes a walking wheel 100, a sliding shaft 200, a power shaft 300, a lever assembly 400, a base 500 and a mounting seat 600. Figure 1 , Figure 2As shown in the figure, the walking wheel 100 is installed at one end of the sliding shaft 200. The end of the sliding shaft 200 facing away from the walking wheel 100 is sleeved on the power shaft 300, and the power shaft 300 is horizontally arranged; the mounting seat 600 is connected to the base 500, and the power shaft 300 is inserted into the mounting seat 600 and rotatably connected to the mounting seat 600; the lever assembly 400 is connected to the sliding shaft 200 and is used to push the sliding shaft 200 to move along the axis of the power shaft 300.

[0035] Specifically, in this embodiment, a total of four walking wheels 100 and corresponding sliding shafts 200 are provided. Two sliding shafts 200 are taken as a group and are respectively sleeved on a power shaft 300. The mounting seat 600 can be set as a pedestal bearing for fixing the power shaft 300 and keeping the power shaft 300 rotatable around its own axis. Further, the variable wheelbase mechanism further includes a bushing. The bushing is sleeved on the sliding shaft 200 and inserted into the base 500 to ensure smooth rotation of the sliding shaft. Obviously, the bushing can be set as a bearing.

[0036] The sliding shaft 200 and the power shaft 300 can be connected by a key, or the end of the power shaft 300 connected to the sliding shaft 200 can be set as a spline, and the sliding shaft 200 is provided with a corresponding spline groove for power transmission.

[0037] In this embodiment, two mounting seats 600 are used to fix a sliding shaft 200. A gear or a sprocket is arranged in the middle of the sliding shaft for connecting with a driving motor to transmit power, so as to drive the walking wheel 100 to rotate. Further, the gear or the sprocket is arranged between the two mounting seats 600 to ensure stable force.

[0038] In an alternative solution of this embodiment, the lever assembly 400 includes a dial block 410, a first guide rail 420, a swing rod 430, a push block 440, a second guide rail 450 and a telescopic push rod 460. As Figure 2 、 Figure 3 shown, a clamping groove is arranged on the dial block 410, and a circular ring boss 210 is arranged on the sliding shaft 200. The circular ring boss 210 is clamped in the clamping groove, so as to drive the sliding shaft 200 to move through the movement of the dial block 410; the length direction of the first guide rail 420 is parallel to the axis of the power shaft 300, and the dial block 410 is clamped on the first guide rail 420 and can move along the length direction of the first guide rail 420. One end of the swing rod 430 is hinged to the dial block 410, and the other end is hinged to the push block 440. The push block 440 is installed on the second guide rail 450 and can move along the length direction of the second guide rail 450. The second guide rail 450 is perpendicular to the first guide rail 420, and the extending end of the telescopic push rod 460 is connected to the push block 440 and is used to drive the push block 440 to move along the second guide rail 450.

[0039] Specifically, as Figure 3As shown, two shift blocks 410 and two swing rods 430 are symmetrically arranged in the shift block 410 assembly. The two swing rods 430 are arranged at an angle with the axis of the telescopic push rod 460. When the telescopic push rod 460 is extended and retracted, the two telescopic push rods 460 are driven to swing in opposite directions, so as to drive the two sliding shafts 200 to move synchronously in opposite directions, thereby changing the spacing between the left and right running wheels 100 along the forward direction. Specifically, when the telescopic push rod 460 is extended, the angle between the two swing rods 430 increases, and the two shift blocks 410 move away from each other; when the telescopic push rod 460 is retracted, the angle between the two swing rods 430 decreases, and the two shift blocks 410 move toward each other. The cross section of the first guide rail 420 is an I-shaped, and the shift block 410 is provided with a corresponding T-shaped slot, which is engaged with the upper part of the I-shaped slot to achieve the connection between the shift block 410 and the first guide rail 420. The second guide rail 450 and the telescopic push rod 460 are both installed on the base 500. A protrusion is provided on the lower side of the push block 440, and a corresponding groove is provided on the upper side of the second guide rail 450 to achieve the limitation and support of the push block 440 and ensure the stable operation of the push block 440.

[0040] During operation, the telescopic push rod 460 drives the push block 440 to move along the second guide rail 450 to change the distance between the push block 440 and the first guide rail 420 , so that the push block 440 drives the swing rod 430 to swing, thereby driving the shifting block 410 to move accordingly.

[0041] In an optional solution of this embodiment, the lever assembly 400 further includes a limit block 470, which is mounted on the first guide rail 420 and is used to limit the distance that the lever block 410 moves along the length direction of the first guide rail 420. Figure 3 As shown, three limit blocks 470 are provided on the first guide rail 420, respectively located in the middle and at both ends of the first guide rail 420. That is, limit blocks 470 are provided at both ends along the moving direction of the shift block 410. The limit blocks 470 are provided to prevent the telescopic push rod 460 from exceeding the formation and causing damage, and to prevent the shift block 410 from being unable to limit the sliding shaft 200 due to damage or disconnection of the swing rod 430, etc., causing the walking wheel 100 to fall out or collide with the base 500, providing the last guarantee for safe operation.

[0042] In this embodiment, the limiting block 470 is provided with two countersunk holes along the length direction of the first guide rail 420 for being screwed to the first guide rail 420 to ensure reliable limiting.

[0043] In an optional solution of this embodiment, the telescopic push rod 460 can be driven by hydraulic pressure, pneumatic pressure, or a screw rod.

[0044] In an alternative solution of this embodiment, a cam can be used to abut against the circular ring boss 210. Cams are provided on both sides of each smooth boss. When it is necessary to move the position of the traveling wheel 100, the two cams rotate simultaneously. One cam rotates from a high point to a low point, and the other cam synchronously rotates from a low point to a high point, so as to smoothly push the sliding shaft 200 to move.

[0045] The working process of the variable wheelbase mechanism provided in this embodiment is as follows:

[0046] When the track widens, it is necessary to increase the distance between the left and right traveling wheels 100 in the forward direction to ensure that the traveling wheels 100 are in full contact with the traveling plate 33, and to prevent the traveling wheels 100 from extending out of the traveling plate 33 or being suspended, which may cause an increase in the pressure on the traveling wheels 100, affecting the service life of the traveling wheels 100 and resulting in unstable operation; at the same time, the distance between the traveling wheels 100 and the side wall 32 is maintained to avoid large lateral displacement during forward movement, which may cause the connection between the bogie and the car body to collide with the traveling plate 33 and cause damage. At this time, the telescopic push rod 460 extends, pushing the push block 440 closer to the first guide rail 420. Driven by the swing rod 430, the dial block 410 moves along the first guide rail 420. The two dial blocks 410 move away from each other along the first guide rail 420 to increase the distance between the left and right traveling wheels 100, ensuring full contact between the traveling wheels 100 and the traveling plate 33.

[0047] When the track narrows, the telescopic push rod 460 contracts, and the two dial blocks 410 approach each other to drive the left and right traveling wheels 100 to move, reducing the distance between the left and right traveling wheels 100 and preventing the traveling wheels 100 from interfering with the side wall 32 and causing inability to move forward.

[0048] According to the variable wheelbase mechanism provided in this embodiment, a variable wheelbase bogie is provided, as Figure 4 shown, which includes a variable wheelbase mechanism and a guide frame 20. The guide frame 20 and the variable wheelbase mechanism are detachably connected to facilitate the replacement of guide frames 20 of different specifications.

[0049] As Figure 5 shown, the guide frame 20 includes guide wheels 21, swing arms 22, telescopic swing rods 23 and a frame body 24. One end of the swing arm 22 is equipped with a guide wheel 21, and the other end is hinged to the frame body 24; one end of the telescopic swing rod 23 is hinged to the swing arm 22, and the other end is hinged to the frame body 24. The telescopic swing rod 23 expands and contracts to push the swing arm 22 to swing, thereby driving the guide wheel 21 to swing, so that the guide wheel 21 presses against the side wall 32 to prevent the guide frame 20 from shaking. Guide wheels 21 and corresponding swing arms 22 and telescopic swing rods 23 are provided at the four corners of the guide frame 20 to ensure the stable operation of the frame body 24 along the track.

[0050] To prevent the swing arm 22 from swinging excessively, limit baffles 24b are provided on both sides of the swing arm 22. By setting the limit baffles 24b to ensure the swing amplitude of the swing arm 22, when the telescopic swing rod 23 is lacking in support, the swing arm 22 can still sufficiently support the guide wheel 21 under the restriction of the limit baffles 24b, preventing the side wall of the track from colliding with the frame 24. At the same time, it can avoid the excessive extension of the telescopic swing rod 23 resulting in an increased pressure on the side wall of the track.

[0051] Obviously, the position of the guide wheel 21 can be set according to the actual situation and is not limited to a specific position.

[0052] Furthermore, a support plate 510 is provided on the base 500. As Figure 1 shown, the bottom surface of the frame 24 abuts against the upper surface of the support plate 510 and is clamped to the base 500.

[0053] In an alternative solution of this embodiment, the guide wheel 21 can be connected to the frame 24 through a telescopic rod, and the telescopic direction of the telescopic rod is perpendicular to the advancing direction of the guide frame 20.

[0054] In this embodiment, a connecting column 24a is provided on the lower side of the frame 24. The connecting column 24a is used to connect with the train carriage, and the base 500 is provided with corresponding through holes for the connecting column 24a to pass through.

[0055] During the operation of the variable wheelbase bogie, the distance between the running wheels 100 is adjusted through the variable wheelbase mechanism to ensure full contact between the running wheels 100 and the running plate 33, guaranteeing stable operation and avoiding situations such as excessive pressure on the running wheels 100 caused by the running wheels 100 overhanging from the running plate 33 and running bumps. At the same time, the guide wheel 21 on the guide frame 20 abuts against the side wall 32 to adapt to tracks of different widths, preventing left - right swinging during operation and avoiding damage caused by the collision between the connecting column 24a and the running plate 33. That is, through the variable wheelbase mechanism and the guide frame 20, the bogie operates stably, avoiding shaking and deviation, ensuring full contact between the running wheels 100 and the running plate 33, with good force distribution. With the cooperation of the variable wheelbase mechanism and the guide frame 20, the bogie maintains stability when running on tracks with variable widths, avoiding collisions and bumps, and ensuring smooth and safe operation.

[0056] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable wheelbase mechanism, characterized in that, It comprises a walking wheel (100), a sliding shaft (200), a power shaft (300) and a lever assembly (400); The running wheel (100) is mounted on one end of the sliding shaft (200), and the end of the sliding shaft (200) away from the running wheel (100) is sleeved on the power shaft (300); The sliding shaft (200) can move along the axial direction of the power shaft (300) and drive the walking wheel (100) to move along the axial direction of the power shaft (300); The power shaft (300) rotates around its own axis to drive the sliding shaft (200) to rotate, thereby driving the running wheel (100) to rotate; The lever assembly (400) is clamped to the sliding shaft (200) and is used to drive the sliding shaft (200) to move along the axial direction of the power shaft (300); The shifting rod assembly (400) comprises a shifting block (410), and the shifting block (410) is clamped on the sliding shaft (200); The shift block (410) can move in a direction parallel to the axis of the power shaft (300); a circular boss (210) is provided on the sliding shaft (200), and a slot is provided on the shift block (410); The annular boss (210) is clamped in the clamping groove; The lever assembly (400) further comprises a first guide rail (420), wherein the first guide rail (420) is parallel to the axis of the power shaft (300); The shifting block (410) is slidably connected to the first guide rail (420) and can move along the length direction of the first guide rail (420).

2. The variable wheelbase mechanism according to claim 1, wherein The lever assembly (400) further comprises a swing rod (430) and a push block (440); One end of the swing rod (430) is hinged to the shifting block (410), and the other end is hinged to the pushing block (440); The pushing block (440) can move in a direction perpendicular to the first guide rail (420).

3. The variable wheelbase mechanism according to claim 2, wherein, The lever assembly (400) further comprises a second guide rail (450), wherein the second guide rail (450) is perpendicular to the first guide rail (420); The push block (440) is slidably connected to the second guide rail (450) and can move along the length direction of the second guide rail (450).

4. The variable track width mechanism according to claim 3, characterized in that, The lever assembly (400) further comprises a telescopic push rod (460), the protruding end of which is connected to the push block (440) and is used to drive the push block (440) to move along the second guide rail (450).

5. The variable wheelbase mechanism according to claim 4, characterized in that, The shifting rod assembly (400) further comprises a limit block (470), wherein the limit block (470) is mounted on the first guide rail (420) and is used to limit the distance that the shifting block (410) moves along the length direction of the first guide rail (420).

6. A variable wheelbase bogie, characterized in that, It comprises a wheelbase changing mechanism as described in any one of claims 1 to 5.

7. The variable wheelbase bogie according to claim 6, characterized in that, It also includes a guide frame (20), wherein the guide frame (20) is mounted on the wheelbase changing mechanism; The wheelbase changing mechanism further comprises a base (500), and the sliding shaft (200) and the power shaft (300) are rotatably connected to the base (500); A support plate (510) is provided on the base (500), and the lower surface of the guide frame (20) abuts against the upper surface of the support plate (510); The guide frame (20) includes guide wheels (21); The guide wheels (21) abut against the side wall of the track and are configured to be displaceable perpendicular to the advancing direction of the guide frame (20).

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