Low-floor tram bogie swing bolster structure

Abstract

The present application relates to rail transit technical field, the present application discloses a kind of low-floor tram bogie's bolster structure, comprising: bolster body, bolster body is arranged in inverted U shape, mandrel insertion hole is located in the middle position of bolster body, the bottom end of bolster body is symmetrically installed with the composite buffer unit connected with bogie, composite buffer unit includes main buffer assembly and auxiliary buffer adjusting assembly, auxiliary buffer adjusting assembly includes: elastic shock absorbing rod, the top end of elastic shock absorbing rod is hinged to the bottom end of bolster body, the bottom end of elastic shock absorbing rod is installed with transverse seat, lateral rotation rod is hinged between the bottom end of bolster body and sliding sleeve, sliding sleeve and reset spring sleeve are arranged on elastic shock absorbing rod.The present application provides a kind of low-floor tram bogie's bolster structure, when car body turns, the active component force of auxiliary buffer adjusting assembly located in outside, thereby the greater lateral force and vertical load of outside track are borne.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to a bogie swing bolster structure of a low-floor tramcar. BACKGROUND

[0002] Chinese patent document CN209700669U discloses a swing bolster and a swing bolster bogie. The swing bolster includes a swing bolster body and two secondary vertical stop seats located at both ends of the swing bolster, and a vertical plane of the swing bolster; a center pin mounting seat is arranged in the middle of the swing bolster body; a transverse shock absorber mounting seat is arranged at the bottom of the swing bolster body; and an annular mounting seat is arranged at the top of the secondary vertical stop seat. The technology has the following shortcomings:

[0003] Because the swing bolster is a key component of the bogie, it is located between the car body and the bogie and bears the force transmitted by the wheel set on the bogie through the track. When the car body turns, the swing bolster on both sides (relative to the longitudinal center line of the vehicle) corresponds to the outer track and the inner track respectively. Because the outer track has a larger radius, it bears a larger lateral force and load. Correspondingly, the wheel set on the side of the outer track bears a larger lateral force and vertical load, which is transmitted to the corresponding side of the swing bolster through the buffer. Therefore, the buffer on the outer side needs to be dynamically adjusted to provide stronger support force to enhance the buffering capacity. Because the existing swing bolster usually adopts symmetrical layout of shock absorbers and suspensions, this design is relatively passive for uneven force buffering when turning. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application discloses a swing bolster structure of a low-floor tramcar bogie, which comprises a swing bolster body, the swing bolster body is arranged in an inverted U shape, a core shaft insertion hole is located at the middle position of the swing bolster body, a composite buffer unit connected with the bogie is symmetrically arranged at the bottom end of the swing bolster body, the composite buffer unit comprises a main buffer assembly and an auxiliary buffer adjustment assembly, the auxiliary buffer adjustment assembly comprises an elastic shock absorbing rod, the top end of the elastic shock absorbing rod is hinged to the bottom end of the swing bolster body, a horizontal movement seat is arranged at the bottom end of the elastic shock absorbing rod, a lateral rotation rod is hinged between the bottom end of the swing bolster body and a sliding sleeve, and the sliding sleeve and a return spring sleeve are arranged on the elastic shock absorbing rod.

[0005] Preferably, lateral hole positions, inner hole positions and a horizontal movement channel communicated between the lateral hole positions and the inner hole positions are arranged on the bogie, the bottom end of the horizontal movement seat is slidably connected to the horizontal movement channel through a horizontal movement frame, so as to switch the position between the lateral hole positions and the inner hole positions, a lifting assembly is arranged at the top end of the horizontal movement seat, a rotating seat is hinged to the bottom end of the elastic shock absorbing rod, the rotating seat is arranged on the lifting assembly, and the return spring is arranged between the sliding sleeve and the rotating seat.

[0006] Preferably, the horizontal moving channel is provided with a horizontal moving screw, a horizontal moving block sleeved on the horizontal moving screw, the horizontal moving block is installed on the horizontal moving frame, a horizontal moving motor is installed on the inner wall of the horizontal moving channel and is arranged close to the outer hole, and the horizontal moving screw is installed on the output end of the horizontal moving motor.

[0007] Preferably, the lifting assembly comprises:

[0008] A lifting base, the lifting base is located at the top end of the horizontal moving seat, and the rotating seat is installed at the top end of the lifting base;

[0009] Four groups of lifting screw sleeves are fixedly installed on the lifting base in a circular array;

[0010] Four groups of lifting screws are rotationally installed at the top end of the horizontal moving seat in a circular array, the lifting screw sleeves are sleeved on the lifting screws, and the lifting base is lifted on the horizontal moving seat after the four groups of lifting screws are rotated.

[0011] Preferably, the lifting assembly further comprises:

[0012] A main rotating sleeve, the main rotating sleeve is sleeved on the horizontal moving screw, and the main rotating sleeve is rotationally installed at the end of the horizontal moving frame away from the horizontal moving block;

[0013] Two groups of horizontal moving grooves are symmetrically formed on the surface of the horizontal moving screw along the axial direction of the horizontal moving screw, the horizontal moving grooves are slidably connected with horizontal moving blocks, and the horizontal moving blocks are fixedly installed on the inner wall of the main rotating sleeve;

[0014] A main bevel gear and a secondary bevel gear, the main bevel gear is installed on the main rotating sleeve, the secondary bevel gear is installed on the bottom end of the horizontal moving seat through a secondary rotating shaft, and the main bevel gear and the secondary bevel gear are in transmission connection;

[0015] A center gear and a secondary gear, the center gear is installed on the secondary rotating shaft, the secondary gear is installed on the lifting screw, and the center gear and the secondary gear are in transmission connection.

[0016] Preferably, the main buffer assembly is a rubber shock absorber.

[0017] Preferably, the width of the top end of the bolster body is greater than 800 mm at the middle position, and the distance from the ground is less than 0 mm.

[0018] Preferably, the lateral rotating rod is located at the end of the elastic shock absorbing rod away from the main buffer assembly.

[0019] Compared with the prior art, the present application has at least the following beneficial effects:

[0020] 1. The invention provides a bogie swing bolster structure of a low-floor tramcar, when the car body turns, the auxiliary buffer adjustment assembly on the outer side actively generates a force component, thereby bearing greater lateral force and vertical load of the outer side track, while the auxiliary buffer adjustment assembly on the inner side does not work, thereby maintaining flexibility, balancing uneven load when turning, and reducing the roll and vibration of the swing bolster body. When the car body turns, the auxiliary buffer adjustment assembly corresponding to the outer side track works, the cross slide at the bottom end of the elastic shock rod slides, and the elastic shock rod changes from a vertical state to an inclined state, thereby generating a horizontal force component to partially offset the lateral force of the outer side track, and when the elastic shock rod changes from a vertical state to an inclined state, the sliding sleeve connected with the lateral rotating rod extrudes the return spring, and the return spring shrinks after being stressed, thereby increasing the stiffness.

[0021] 2. The invention provides a bogie swing bolster structure of a low-floor tramcar, the cross slide motor works, thereby driving the cross slide screw installed on the output end of the cross slide motor to rotate, and the cross slide screw drives the cross slide block sleeved thereon and the cross slide frame connected with the cross slide block to slide in the cross slide channel, thereby realizing the position switching of the bottom end of the elastic shock rod connected with the cross slide frame between the outer side hole and the inner side hole. When the cross slide frame is in the inner side hole, the elastic shock rod is in a vertical state, and when the cross slide frame is in the outer side hole, the elastic shock rod is in an inclined state. When the elastic shock rod is in an inclined state, the sliding sleeve connected with the lateral rotating rod slides towards the direction of the rotating seat, thereby extruding the return spring between the sliding sleeve and the rotating seat, and the return spring shrinks. The greater the shrinkage of the return spring, the greater the stiffness. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order 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 needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0023] Figure 1 Structure diagram of the invention Figure 1 (car body straight running);

[0024] Figure 2 Structure diagram of the invention Figure 1 auxiliary buffer adjustment assembly structure diagram;

[0025] Figure 3 Structure diagram of the cross slide frame in the invention

[0026] Figure 4 Structure diagram of the invention Figure 2 (car body right turning);

[0027] Figure 5 For Figure 4 Auxiliary buffer adjustment assembly structure schematic view

[0028] Figure 6 Structure schematic view of the present application Figure 3 When the vehicle body turns left

[0029] Figure 7 Rocker body profile view of the present application

[0030] Figure 8 Rocker body installation schematic view on the bogie of the present application

[0031] In the figure: 10. Rocker body; 11. Mandrel insertion hole; 12. Bogie; 13. Compound buffer unit; 14. Main buffer assembly; 15. Auxiliary buffer adjustment assembly; 16. Elastic shock-absorbing rod; 17. Lateral displacement seat; 18. Lateral rotation rod; 19. Sliding sleeve; 20. Return spring; 21. Lateral displacement channel; 22. Lateral displacement frame; 23. Rotation seat; 24. Lateral displacement motor; 25. Lateral displacement screw; 26. Lateral displacement screw block; 27. Lifting base; 28. Lifting screw sleeve; 29. Lifting screw; 30. Main rotation sleeve; 32. Main helical gear; 33. Auxiliary helical gear; 34. Center gear; 35. Auxiliary gear. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0033] Please refer to Figures 1 to 8 The rocker structure of the low-floor tram bogie provided by the embodiment comprises a rocker body 10, the rocker body 10 is arranged in an inverted U shape, a mandrel insertion hole 11 is located at the middle position of the rocker body 10, the bottom end of the rocker body 10 is symmetrically provided with a compound buffer unit 13 connected with a bogie 12, the compound buffer unit 13 comprises a main buffer assembly 14 and an auxiliary buffer adjustment assembly 15, the auxiliary buffer adjustment assembly 15 comprises an elastic shock-absorbing rod 16, the top end of the elastic shock-absorbing rod 16 is hinged to the bottom end of the rocker body 10, the bottom end of the elastic shock-absorbing rod 16 is provided with a lateral displacement seat 17, a lateral rotation rod 18 is hinged between the bottom end of the rocker body 10 and a sliding sleeve 19, and the sliding sleeve 19 and a return spring 20 are sleeved on the elastic shock-absorbing rod 16.

[0034] The working principle and beneficial effects of the above technical solution are as follows:

[0035] The application discloses a bogie swing bolster structure of a low-floor tramcar, and when a vehicle body turns, an auxiliary buffer adjusting assembly 15 corresponding to an outer rail works, a horizontal moving seat 17 at the bottom end of an elastic damping rod 16 slides, the elastic damping rod 16 is turned from a vertical state to an inclined state, thereby generating a horizontal component force to partially offset the lateral force of the outer rail, and when the elastic damping rod 16 is turned from the vertical state to the inclined state, a sliding sleeve 19 connected with a lateral rotating rod 18 extrudes a return spring 20, and after the return spring 20 is contracted under force, the stiffness is improved. The bogie swing bolster structure of the low-floor tramcar is provided, and the differential buffer adjustment of the inner and outer rails during turning is realized. When the vehicle body turns, the auxiliary buffer adjusting assembly 15 at the outer side actively generates a component force, thereby bearing the greater lateral force and vertical load of the outer rail, and the auxiliary buffer adjusting assembly at the inner side does not work, thereby maintaining flexibility, balancing the uneven load during turning, and reducing the roll and vibration of the swing bolster body 10. The stability and passenger comfort during turning of the vehicle are improved.

[0036] In the embodiment, the bogie 12 is provided with an outer hole position, an inner hole position and a horizontal moving channel 21 communicated between the outer hole position and the inner hole position, the horizontal moving seat 17 at the bottom end is slidably connected to the horizontal moving channel 21 through a horizontal moving frame 22, thereby switching the position between the outer hole position and the inner hole position, the top end of the horizontal moving seat 17 is provided with a lifting assembly, the bottom end of the elastic damping rod 16 is hingedly connected with a rotating seat 23, the rotating seat 23 is installed on the lifting assembly, and the return spring 20 is arranged between the sliding sleeve 19 and the rotating seat 23.

[0037] The working principle and beneficial effects of the above technical scheme are as follows:

[0038] The horizontal moving frame 22 slides in the horizontal moving channel 21, thereby switching the position of the horizontal moving seat 17 connected with the horizontal moving frame 22 and the bottom end of the elastic damping rod 16 connected with the horizontal moving seat 17 between the outer hole position and the inner hole position. When the horizontal moving frame 22 is in the inner hole position, the elastic damping rod 16 is in the vertical state, and when the horizontal moving frame 22 is in the outer hole position, the elastic damping rod 16 is in the inclined state. When the elastic damping rod 16 is in the inclined state, the sliding sleeve 19 connected with the lateral rotating rod 18 slides towards the rotating seat 23, thereby extruding the return spring 20 between the sliding sleeve 19 and the rotating seat 23, and the return spring 20 is contracted. The greater the contraction amount of the return spring 20, the greater the stiffness.

[0039] In the embodiment, a horizontal moving screw 25 is installed in the horizontal moving channel 21, a horizontal moving screw block 26 is sleeved on the horizontal moving screw 25, the horizontal moving screw block 26 is installed on the horizontal moving frame 22, a horizontal moving motor 24 is installed on the inner wall of the horizontal moving channel 21 and is arranged close to the outer hole position, and the horizontal moving screw 25 is installed on the output end of the horizontal moving motor 24.

[0040] The working principle of the above technical scheme is as follows:

[0041] The horizontal moving motor 24 works, and then drives the horizontal moving screw 25 installed on the output end of the horizontal moving motor 24 to rotate. The horizontal moving screw 25 drives the horizontal moving block 26 sleeved thereon and the horizontal moving frame 22 connected with the horizontal moving block 26 to slide in the horizontal moving channel 21, so as to realize the position switching of the bottom end of the horizontal moving seat 17 connected with the horizontal moving frame 22 and the elastic damping rod 16 connected with the horizontal moving seat 17 between the outer hole position and the inner hole position.

[0042] In the embodiment, the lifting assembly comprises:

[0043] The lifting base 27 is located at the top end of the horizontal moving seat 17, and the rotating seat 23 is installed at the top end of the lifting base 27.

[0044] The lifting screw sleeve 28 is fixedly installed on the lifting base 27 in a circular array.

[0045] The lifting screw rod 29 is rotatably installed at the top end of the horizontal moving seat 17 in a circular array, the lifting screw sleeve 28 is sleeved on the lifting screw rod 29, and the four groups of lifting screw rods 29 are rotated, so that the lifting base 27 is lifted on the horizontal moving seat 17.

[0046] The lifting assembly further comprises:

[0047] The main rotating sleeve 30 is sleeved on the horizontal moving screw 25, and the main rotating sleeve 30 is rotatably installed at the end of the horizontal moving frame 22 away from the horizontal moving block 26.

[0048] The horizontal moving groove is symmetrically formed on the surface of the horizontal moving screw 25 along the axial direction of the horizontal moving screw 25, and the horizontal moving block is slidably connected in the horizontal moving groove.

[0049] The main bevel gear 32 is installed on the main rotating sleeve 30, the secondary bevel gear 33 is installed on the bottom end of the horizontal moving seat 17 through the secondary rotating shaft, and the main bevel gear 32 and the secondary bevel gear 33 are in transmission connection.

[0050] The center gear 34 is installed on the secondary rotating shaft, the secondary gear 35 is installed on the lifting screw rod 29, and the center gear 34 and the secondary gear 35 are in transmission connection.

[0051] The working principle and beneficial effects of the above technical scheme are:

[0052] When the horizontal moving screw 25 rotates, the bottom end of the elastic damping rod 16 is switched from the inner hole position to the outer hole position, the main rotating sleeve 30 sleeved on the horizontal moving screw 25 rotates synchronously under the cooperation of the horizontal moving block and the horizontal moving groove, when the main rotating sleeve 30 rotates on the horizontal moving frame 22, the main bevel gear 32 and the secondary bevel gear 33 are engaged to drive the secondary rotating shaft connected with the secondary bevel gear 33 to rotate, the central gear 34 installed on the secondary rotating shaft drives the four secondary gears 35 distributed on the side end of the central gear 34 to rotate synchronously, thereby driving the lifting screw 29 connected with the secondary gear 35 to rotate on the horizontal moving seat 17, after the lifting screw sleeve 28 sleeved on the lifting screw 29 drives the lifting base 27 to lift, the rotating seat 23 installed on the lifting base 27 is lifted synchronously, so that when the elastic damping rod 16 is switched from the vertical state to the inclined state, the overall height of the bolster body 10 on the same side of the elastic damping rod 16 in the inclined state is unchanged, thereby optimizing the buffering performance without reducing the overall height.

[0053] In the embodiment, the main buffering assembly 14 is a rubber shock absorber.

[0054] In the embodiment, the width of the top end of the bolster body 10 is greater than 800mm at the middle position, and the distance from the ground is less than 0mm.

[0055] In the embodiment, the lateral rotating rod 18 is located at the end of the elastic damping rod 16 away from the main buffering assembly 14.

[0056] Obviously, the above embodiment is only an example for clearly illustrating, but not a limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A bogie structure of a low-floor tramcar, characterized in that, The utility model relates to a composite buffer unit for a bogie, and more particularly to a composite buffer unit for a bogie with a lifting mechanism. The utility model discloses a composite buffer unit for a bogie, which comprises a bolster body (10) arranged in an inverted U shape, a mandrel insertion hole (11) located at the middle of the bolster body (10), a composite buffer unit (13) connected with a bogie (12) symmetrically installed at the bottom end of the bolster body (10), the composite buffer unit (13) comprising a main buffer assembly (14) and an auxiliary buffer adjusting assembly (15), the auxiliary buffer adjusting assembly (15) comprising an elastic shock absorbing rod (16), the top end of the elastic shock absorbing rod (16) being hinged to the bottom end of the bolster body (10), a lateral moving seat (17) being installed at the bottom end of the elastic shock absorbing rod (16), a lateral rotating rod (18) being hinged between the bottom end of the bolster body (10) and a sliding sleeve (19), the sliding sleeve (19) and a reset spring (20) being sleeved on the elastic shock absorbing rod (16). The bogie (12) is provided with an outer hole position, an inner hole position and a lateral moving channel (21) communicated between the outer hole position and the inner hole position, the bottom end of the lateral moving seat (17) being slidably connected to the lateral moving channel (21) through a lateral moving frame (22) to switch positions between the outer hole position and the inner hole position, the top end of the lateral moving seat (17) being provided with a lifting assembly, the bottom end of the elastic shock absorbing rod (16) being hinged to a rotating seat (23), the rotating seat (23) being installed on the lifting assembly, the reset spring (20) being abutted between the sliding sleeve (19) and the rotating seat (23).

2. The bogie structure of a low-floor tramcar according to claim 1, characterized in that The lateral moving channel (21) is provided with a lateral moving screw rod (25), a lateral moving screw block (26) being sleeved on the lateral moving screw rod (25), the lateral moving screw block (26) being installed on the lateral moving frame (22), a lateral moving motor (24) being installed on the inner wall of the lateral moving channel (21) and being arranged close to the outer hole position, the lateral moving screw rod (25) being installed on the output end of the lateral moving motor (24).

3. The swing bolster structure of a low-floor tramcar bogie according to claim 1, characterized in that, The lifting assembly comprises a lifting base (27) located at the top end of the lateral moving seat (17), the rotating seat (23) being installed at the top end of the lifting base (27), four groups of lifting screw sleeves (28) being fixedly installed on the lifting base (27) in a circular array, four groups of lifting screw rods (29) being rotatably installed at the top end of the lateral moving seat (17) in a circular array, the lifting screw sleeves (28) being sleeved on the lifting screw rods (29), the lifting base (27) being lifted on the lateral moving seat (17) after the four groups of lifting screw rods (29) are rotated.

4. The bogie structure of a low-floor tramcar according to claim 3, characterized in that The lifting assembly further comprises a main rotating sleeve (30) sleeved on the lateral moving screw rod (25), the main rotating sleeve (30) being rotatably installed on the lateral moving frame (22) away from the lateral moving screw block (26), two groups of lateral moving grooves being symmetrically formed on the surface of the lateral moving screw rod (25) in the axial direction of the lateral moving screw rod (25), a lateral moving block being slidably connected in the lateral moving grooves, the lateral moving block being fixedly installed on the inner wall of the main rotating sleeve (30), a main helical gear (32) being installed on the main rotating sleeve (30), a secondary helical gear (33) being installed on the bottom end of the lateral moving seat (17) through a secondary rotating shaft, the main helical gear (32) and the secondary helical gear (33) being in transmission connection, a center gear (34) being installed on the secondary rotating shaft, a secondary gear (35) being installed on the lifting screw rod (29), the center gear (34) and the secondary gear (35) being in transmission connection.

5. The bogie structure of a low-floor tramcar according to claim 1, characterized in that, The main buffer assembly (14) is a rubber shock absorber.

6. The swing bolster structure of a low-floor tramcar bogie according to claim 1, characterized in that, The width of the top end middle position of the bolster body (10) is greater than 800 mm, and the distance from the ground height is less than 0 mm.

7. The bogie structure of a low-floor tramcar according to claim 1, characterized in that, The lateral rotating rod (18) is located at the end of the elastic shock absorbing rod (16) away from the main buffer assembly (14).

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