Structure for adjusting height of subway carriage

Abstract

The utility model discloses a structure for adjusting the height of a subway carriage. The structure comprises a height valve connected with a train body and a connecting bracket connected with a subway bogie, the height valve comprises a valve body, the valve body communicates with an air spring, and a valve element assembly is slidably connected into the valve body. A driving shaft is rotationally connected to the valve body, one end of the driving shaft penetrates through the valve body and is movably connected with the valve element assembly, and the other end of the driving shaft is connected with a horizontal valve rod. The horizontal valve rod stirs the driving shaft and drives the valve element assembly to move up and down, inflation and exhaust of the air spring are controlled, a torsional spring is arranged between the horizontal valve rod and the valve body, and the end, away from the driving shaft, of the horizontal valve rod abuts against the connecting support. Opening and closing of the air inflation channel or the air exhaust channel of the air spring are completed through opening and closing of the height valve, so that air inflation and air exhaust of the air spring are achieved, transverse force generated by a vehicle body and a bogie support can be converted into displacement between the horizontal valve rod and the connecting piece, and damage caused by the fact that the force is transmitted into the height valve is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, concretely is a structure of adjusting subway carriage height. BACKGROUND

[0002] Subway vehicle height adjustment system is through the automatic filling and exhausting of car air spring to realize the adjustment of car height, avoids the car plane high and low condition caused by the size of passenger carrying capacity, thereby influences the safety of passenger getting on and off the vehicle.

[0003] Domestic subway vehicle generally passes through height adjustment valve (abbreviation height valve) to control the filling and exhausting of air spring, when subway carriage is at the set height (is aligned with the platform plane), the horizontal valve rod of height valve is in neutral position, the valve core assembly of height valve keeps closed, air spring does not inflate and exhaust at this time.

[0004] At present, in practical application, height valve is fixed on the car body of subway, and the horizontal valve rod of height valve is connected to the bogie of subway through connecting rod, when the passenger carrying capacity of subway vehicle changes, the height of car changes, height valve will move up and down along with the height of car, at this time, connecting rod and horizontal valve rod convert the height change between car body and bogie into the opening and closing of height valve, control the opening and closing of height valve to control the inflation or exhaust of air spring, realize the rise or fall of car height, thereby maintain the constant height difference between car plane and platform plane.

[0005] But in the running of subway, especially when running in the curve, the non-vertical relative motion between bogie and car body will produce complex external force, such as lateral force, lateral force will be transmitted to the valve core assembly inside height valve through connecting rod and horizontal valve rod, thereby causing the wear and even jam of valve core assembly inside height valve, thereby causing the functional failure of height valve, unable to carry out filling and exhausting control, finally leading to air spring always being in the inflation position or exhaust position, the position of car cannot be changed, and the safety hidden trouble of passenger getting on and off the vehicle is produced, even if the vehicle pantograph is stressed unevenly after the car is lifted, pantograph failure and a series of safety hidden troubles caused thereby are also produced. INVENTION CONTENTS

[0006] The utility model discloses a structure of adjusting subway carriage height, which can avoid transmitting lateral force to the inside of height valve when subway turns, and avoid safety hidden trouble caused by height valve damage.

[0007] In order to achieve the above object, the utility model discloses a structure for adjusting the height of a subway car body, comprising a height valve connected to the car body of the subway, a connecting bracket connected to the bogie of the subway, a valve body, an air spring connected to the valve body, a valve core assembly slidingly connected to the inside of the valve body, a drive shaft rotatably connected to the valve body, one end of the drive shaft penetrating the valve body and movably connected to the valve core assembly, and a horizontal valve rod connected to the other end of the drive shaft.

[0008] In the above technical solution, the structure is provided on both sides of the subway vehicle during use. During straight driving of the subway vehicle, there is no non-vertical relative movement between the car body and the bogie, the height of the car body is kept constant, the horizontal valve rod is in the middle position, and the air spring is neither inflated nor deflated. When the passenger load of the subway increases, the car body will descend, the height valve will also descend with the car body, and the distance between the car body and the bogie will decrease. At this time, the horizontal valve rod will be actuated by the torsional spring to rotate the valve body and the horizontal valve rod relative to each other, the end away from the drive shaft will be lifted, the horizontal valve rod will rotate the drive shaft and drive the valve core assembly to move upward, the inflation passage of the height valve will be opened, the external air source can inflate the air spring through the height valve, the air spring will lift the car body to keep the relative height of the car body plane unchanged, thereby avoiding safety hazards caused by changes in the relative height of the car body plane and the platform plane when passengers get on and off the vehicle. When the passenger load of the vehicle decreases, the height valve will also rise with the car body, the distance between the car body and the bogie will increase, and the end of the horizontal valve rod abutting against the connecting bracket will remain in the original position. At this time, the horizontal valve rod and the height valve body also rotate relative to each other, and the valve core assembly will move downward under the action of the horizontal valve rod. At this time, the exhaust passage of the height valve is opened, and the gas in the air spring is discharged. When the vehicle is running on a curve, the car body and the bogie will produce non-vertical relative movement, thereby generating horizontal lateral force between the car body and the bogie. When the lateral force is transmitted to the connecting bracket and the horizontal valve rod, the end of the horizontal valve rod abutting against the connecting bracket will move left and right relative to the connecting bracket, and the lateral force will not be transmitted to the inside of the height valve, thereby avoiding damage to the valve core assembly inside the height valve and causing safety hazards.

[0009] Preferably, the horizontal valve rod is "L"-shaped, the long section of the horizontal valve rod is connected to the drive shaft, and the short section of the horizontal valve rod abuts against the connecting bracket.

[0010] Preferably, the end surface of the short section of the horizontal valve rod is a curved surface, and the curved surface abuts against the connecting bracket.

[0011] Preferably, a torsional spring fixing hole one is arranged on the horizontal valve rod, a torsional spring fixing hole two is arranged on the valve body, and the two ends of the torsional spring are respectively inserted into the fixing hole one and the torsional spring fixing hole two.

[0012] Preferably, the connecting support comprises, in sequence, an abutting plate, a connecting plate and a fixing plate, and the abutting plate and the fixing plate are both perpendicular to the connecting plate; the horizontal valve rod abuts against the bottom surface of the abutting plate, and the fixing plate is connected with the bogie of the subway.

[0013] Preferably, the connecting support further comprises a reinforcing plate, and the reinforcing plate is connected with the abutting plate, the connecting plate and the fixing plate and is perpendicular to the abutting plate, the connecting plate and the fixing plate.

[0014] Preferably, the fixing plate is connected with the bogie of the subway through a screw.

[0015] Preferably, the driving shaft comprises a driving section close to the valve core assembly and a connecting section connected with the horizontal valve rod, the end surface of the driving section is eccentrically provided with a pin shaft, and the pin shaft is movably connected with the valve core assembly; the circumferential surface of the connecting section is provided with a connecting plane, and the connecting plane is connected with the horizontal valve rod.

[0016] Preferably, the inside of the valve body comprises a reset cavity and a sliding cavity which are connected in communication, the reset cavity is communicated with an air inlet, the sliding cavity is communicated with an air outlet and a connecting hole; the valve core assembly is provided with two sealing pads, a reset spring is arranged between the two sealing pads, and the two sealing pads are respectively abutted against the stepped surface between the air inlet and the reset cavity and the stepped surface between the reset cavity and the sliding cavity; the valve core assembly further comprises a valve rod, the valve rod is slidably arranged in the sliding cavity, and the driving shaft is movably connected with the valve rod.

[0017] Preferably, a rubber pad is arranged on the sealing pad.

[0018] The utility model has the following beneficial effects:

[0019] When the subway runs on a curve, the lateral force generated is converted into left-right displacement between the horizontal valve rod and the connecting support, so that the lateral force is not transmitted to the inside of the height valve, the height valve is not damaged, and a safety hazard is not caused. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of an initial state of the utility model;

[0021] Figure 2 It is a structure schematic view of the utility model in an air spring inflation state;

[0022] Figure 3The utility model discloses air spring exhaust state schematic drawing;

[0023] Figure 4 The utility model discloses height valve structure schematic drawing;

[0024] Figure 5 The utility model discloses height valve internal structure schematic drawing;

[0025] Figure 6 The utility model discloses valve body structure schematic drawing;

[0026] Figure 7 The utility model discloses drive shaft structure schematic drawing;

[0027] Figure 8 The utility model discloses horizontal valve rod structure schematic drawing;

[0028] Figure 9 The utility model discloses connecting support structure schematic drawing.

[0029] In the drawing: 1, height valve;11, valve body;111, torsional spring fixed hole two;12, valve core subassembly;121, reset cavity;122, sliding cavity;123, air inlet;124, air outlet;125, connecting hole;126, sealing pad;1261, rubber pad;127, valve rod;1271, sealing ring;128, gas passage;13, drive shaft;131, pin shaft;132, connecting plane;15, horizontal valve rod;151, torsional spring fixed hole one;17, torsional spring;2, connecting support;21, abutment plate;22, connecting plate;23, fixed plate;24, reinforcing plate. DETAILED DESCRIPTION

[0030] In the description of the utility model, it is necessary to explain that the orientation or positional relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or positional relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, and in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0031] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model

[0032] Embodiment 1

[0033] As Figures 1-3 shown, a structure for adjusting the height of a subway car body, comprising a height valve 1, the height valve 1 is connected with the car body of the subway;Further comprising a connecting bracket 2, the connecting bracket 2 is connected with the bogie of the subway;The height valve 1 comprises a valve body 11, the valve body 11 is communicated with an air spring, the valve body 11 is slidably connected with a valve core assembly 12;The valve body 11 is rotatably connected with a drive shaft 13, one end of the drive shaft 13 passes through the valve body 11 and is movably connected with the valve core assembly 12, the other end is connected with a horizontal valve rod 15;The horizontal valve rod 15 drives the drive shaft 13 and drives the valve core assembly 12 to control the inflation and deflation of the air spring, a torsion spring 17 is arranged between the horizontal valve rod 15 and the valve body 11, one end of the horizontal valve rod 15 away from the drive shaft 13 abuts with the connecting bracket 2.

[0034] The working principle of this embodiment is as follows: During use, this structure is installed on both sides of the subway car. When the subway car is traveling in a straight line, there is no non-vertical relative movement between the car body and the bogie, and the height of the car body and carriage remains constant. The horizontal valve stem 15 is in the middle position, and the air spring is neither inflated nor deflated. When the passenger load of the subway car increases, the car body on one side will descend due to inertia, and the height valve 1 will also descend with the car body. The distance between the car body and the bogie will decrease. At this time, under the spring force of the torsion spring 17, the valve body 11 of the height valve 1 and the horizontal valve stem 15 will rotate relative to each other, and the end away from the drive shaft 13 will lift up. The horizontal valve stem 15 drives the drive shaft 13 to rotate and drives the valve core assembly towards the assembly. When the vehicle moves upward, the air passage of the height valve 1 opens, allowing external air to inflate the air spring through the height valve 1. The air spring then lifts the car body, maintaining a constant relative height between the car body and the platform, thus preventing safety hazards caused by changes in the relative height between the car body and the platform when passengers get on and off. When the passenger load decreases, the height valve 1 also rises with the car body, increasing the distance between the car body and the bogie. The connecting bracket 2 pulls the end of the horizontal valve rod 15 that abuts against the connecting bracket 2, keeping it in place. At this time, the horizontal valve rod 15 and the height valve 1 body also rotate relative to each other. The valve core assembly moves downward under the action of the horizontal valve rod 15, opening the exhaust passage of the height valve 1 and releasing the gas from the air spring. When the vehicle is turning in a curve, the car body and bogie will have a non-vertical relative motion, which will generate a horizontal lateral force between the car body and the bogie. When this lateral force is transmitted to the connecting bracket 2 and the horizontal valve stem 15, the end of the horizontal valve stem 15 that abuts against the connecting bracket 2 will be displaced to the left and right. The resulting lateral force will not be transmitted to the interior of the height valve 1, thus avoiding the safety hazard caused by damage to the valve core assembly inside the height valve 1.

[0035] The beneficial effects of this embodiment are: when the subway is traveling on a curve, the lateral force generated is converted into left and right displacement between the horizontal valve stem 15 and the connecting bracket 2, thereby avoiding the transmission of the lateral force to the interior of the height valve 1, which would cause damage to the height valve 1 and thus create a safety hazard.

[0036] Example 2

[0037] like Figure 8 As shown, another embodiment of a structure for adjusting the height of a subway car body is shown. The main difference between this embodiment and the first embodiment is that the horizontal valve rod 15 is "L" shaped, the long section of the horizontal valve rod 15 is connected to the drive shaft 13, and the end face of the short section of the horizontal valve rod 15 is curved, with the curved surface abutting against the connecting bracket 2.

[0038] The working principle of this embodiment is as follows: When the distance between the car body and the bogie changes, the horizontal valve stem 15 will rotate relative to the valve body 11. During the rotation of the horizontal valve stem 15, the end face of the short section of the horizontal valve stem 15 will always be in contact with the connecting bracket 2. Therefore, when the distance between the car body and the bogie changes, the cross-sectional position of the short section of the horizontal valve stem 15 will also change, thereby driving the drive shaft 13 to rotate and control the valve core assembly 12 to move up and down to control the opening and closing of the height valve 1.

[0039] The beneficial effects of this embodiment are as follows: If the horizontal valve stem 15 is straight, when the distance between the connecting bracket 2 and the vehicle body increases, the horizontal valve stem 15 will rotate downward due to the limitation of the connecting bracket 2. When the rotation angle is large, the circumferential side of the horizontal valve stem 15 will abut against the connecting bracket 2, and the end face of the horizontal valve stem 15 will move away from the connecting rod bracket, which will cause the actual change to not be accurately fed back to the height valve 1. Therefore, the combination of an "L"-shaped rod and a curved end face can accurately feed back the change in distance between the vehicle body and the bogie to the height valve 1, thereby accurately controlling the opening and closing of the height valve 1.

[0040] Example 3

[0041] like Figure 4 , 5 As shown in Figure 7, another embodiment of a structure for adjusting the height of a subway car body is provided. The main difference between this embodiment and the first embodiment is that the horizontal valve stem 15 is provided with a torsion spring fixing hole 151, and the valve body 11 is provided with a torsion spring fixing hole 111. The two ends of the torsion spring 17 are respectively inserted into the torsion spring fixing hole 151 and the torsion spring fixing hole 111.

[0042] The working principle of this embodiment is as follows: When the distance between the car body and the bogie decreases, the horizontal valve rod 15 can rotate upward under the action of the torsion spring 17. During this process, the torsion spring 17 is engaged in the torsion spring fixing hole 151 and the torsion spring fixing hole 111, which can prevent the spring from being unable to bear force and thus prevent the horizontal valve rod 15 from being unable to lift. After the horizontal valve rod 15 rotates upward, the horizontal valve rod 15 can be reset under the action of the torsion spring 17.

[0043] The beneficial effect of this embodiment is that by inserting the torsion spring 17 into the fixing hole of the torsion spring 17, it can be ensured that the torsion spring 17 can better apply elastic force to the horizontal valve stem 15, so that the horizontal valve stem 15 can be more easily reset.

[0044] Example 4

[0045] like Figure 9As shown, another embodiment of a structure for adjusting the height of a subway car body differs from Embodiment 1 mainly in that the connecting bracket 2 includes an abutment plate 21, a connecting plate 22, and a fixing plate 23 connected in sequence, and both the abutment plate 21 and the fixing plate 23 are perpendicular to the connecting plate 22; the horizontal valve stem 15 abuts against the bottom surface of the abutment plate 21, and the fixing plate 23 is connected to the subway bogie by screws.

[0046] The connecting bracket 2 also includes a reinforcing plate 24, which is connected to the abutment plate 21, the connecting plate 22 and the fixing plate 23, and is perpendicular to the abutment plate 21, the connecting plate 22 and the fixing plate 23.

[0047] The working principle of this embodiment is as follows: the horizontal valve stem 15 abuts against the abutment plate 21 under the action of the torsion spring 17. When the car body and the bogie support generate lateral force, the horizontal valve stem 15 and the abutment plate 21 are displaced in the left and right directions under the action of the lateral force. After the displacement occurs, the lateral force cannot be transmitted to the interior of the height valve 1.

[0048] The beneficial effects of this embodiment are: the direct connection between the horizontal valve stem 15 and the abutment plate 21 may not prevent the lateral force from being transmitted to the interior of the height valve 1, which may cause damage to the interior of the height valve 1 due to the force, thus creating a safety hazard; and the reinforcement plate 23 improves the overall strength of the connecting bracket 2.

[0049] Example 5

[0050] like Figures 4-5 As shown, another embodiment of a structure for adjusting the height of a subway car body differs from Embodiment 1 mainly in that the valve body 11 includes a resetting chamber 121 and a sliding chamber 122 that are connected. The resetting chamber 121 is connected to an air inlet 123, and the sliding chamber 122 is connected to an air outlet 124 and a connecting hole 125. The valve core assembly 12 is provided with two sealing gaskets 126, and a resetting spring is provided between the two sealing gaskets 126. The two sealing gaskets 126 are respectively connected to the air inlet 124 and the connecting hole 125. The stepped surfaces between the air inlet 123 and the reset chamber 121, and between the reset chamber 121 and the sliding chamber 122, abut against each other, and the sealing gasket 126 is provided with rubber gaskets 1261 on the side near the air inlet 123 and the sliding chamber 122; the valve core assembly 12 also includes a valve stem 127, on which an air passage 128 is provided, the valve stem 127 is slidably disposed in the sliding chamber 122, a sealing ring is provided between the valve stem 127 and the sliding chamber 122, and the drive shaft 13 is movably connected to the valve stem 127.

[0051] The working principle of the embodiment is as follows: when the driving shaft 13 drives the valve rod 127 to move upward, the valve rod 127 pushes the sealing gasket 126 close to the sliding cavity 122 to move upward, at this time, the reset cavity 121 and the inlet channel of the sealing cavity are communicated, and the external air pressure pushes the sealing gasket 126 close to the air inlet to open again by overcoming the elastic force of the reset spring, so that the air inlet 123, the reset cavity 121 and the air inlet channel of the connecting hole 125 are opened, and the air spring can be inflated; when the driving shaft 13 drives the valve rod 127 to move downward, the valve core assembly 12 moves downward, at this time, the valve rod 127 is away from the sealing gasket 126, the connecting hole 125, the air duct 128 and the exhaust outlet are communicated, and the air spring can complete the exhaust through the above-mentioned channel.

[0052] The embodiment has the beneficial effect that the opening and closing of the height control valve 1 can be precisely controlled through the up-down movement of the valve core assembly.

[0053] Obviously, the above embodiment of the utility model is only an example for clearly illustrating the utility model, and is not a limitation on the implementation mode of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. It is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A structure for adjusting the height of a subway car, comprising a height valve (1) connected to the subway car body; characterized in that, It also includes a connecting bracket (2), which is connected to the bogie of the subway; the height valve (1) includes a valve body (11), which is connected to an air spring, and a valve core assembly (12) is slidably connected inside the valve body (11); a drive shaft (13) is rotatably connected to the valve body (11), one end of the drive shaft (13) passes through the valve body (11) and is movably connected to the valve core assembly (12), and the other end is connected to a horizontal valve rod (15); the horizontal valve rod (15) moves the drive shaft (13) and drives the valve core assembly (12) to move up and down to control the inflation and deflation of the air spring, and a torsion spring (17) is provided between the horizontal valve rod (15) and the valve body (11), and the end of the horizontal valve rod (15) away from the drive shaft (13) abuts against the connecting bracket (2).

2. The structure for adjusting the height of a subway car according to claim 1, characterized in that, The horizontal valve stem (15) is "L" shaped. The long section of the horizontal valve stem (15) is connected to the drive shaft (13), and the short section of the horizontal valve stem (15) is connected to the connecting bracket (2).

3. The structure for adjusting the height of a subway car according to claim 2, characterized in that, The end face of the short section of the horizontal valve stem (15) is curved, and the curved surface abuts against the connecting bracket (2).

4. The structure for adjusting the height of a subway car according to claim 1, characterized in that, The horizontal valve stem (15) is provided with a torsion spring fixing hole one (151), and the valve body (11) is provided with a torsion spring fixing hole two (111). The two ends of the torsion spring (17) are respectively inserted into the torsion spring fixing hole one (151) and the torsion spring fixing hole two (111).

5. The structure for adjusting the height of a subway car according to claim 1, characterized in that, The connecting bracket (2) includes an abutment plate (21), a connecting plate (22) and a fixing plate (23) connected in sequence, and the abutment plate (21) and the fixing plate (23) are both perpendicular to the connecting plate (22); the horizontal valve stem (15) abuts against the bottom surface of the abutment plate (21), and the fixing plate (23) is connected to the bogie of the subway.

6. The structure for adjusting the height of a subway car according to claim 5, characterized in that, The connecting bracket (2) further includes a reinforcing plate (24), which is connected to the abutment plate (21), the connecting plate (22) and the fixing plate (23), and the reinforcing plate (24) is perpendicular to the abutment plate (21), the connecting plate (22) and the fixing plate (23).

7. The structure for adjusting the height of a subway car according to claim 6, characterized in that, The fixing plate (23) is connected to the subway bogie by screws.

8. The structure for adjusting the height of a subway car according to claim 1, characterized in that, The drive shaft (13) includes a drive section near the valve core assembly (12) and a connecting section connecting the horizontal valve stem (15). The end face of the drive section is eccentrically provided with a pin (131), which is movably connected to the valve core assembly (12). The circumferential surface of the connecting section is provided with a connecting plane (132), which is connected to the horizontal valve stem (15).

9. The structure for adjusting the height of a subway car according to claim 1, characterized in that, The valve body (11) includes a resetting chamber (121) and a sliding chamber (122) that are connected to each other. The resetting chamber (121) is connected to an air inlet (123), and the sliding chamber (122) is connected to an air outlet (124) and a connecting hole (125). The valve core assembly (12) is provided with two sealing gaskets (126), and a resetting spring is provided between the two sealing gaskets (126). The two sealing gaskets (126) respectively abut against the stepped surface between the air inlet (123) and the resetting chamber (121), and the stepped surface between the resetting chamber (121) and the sliding chamber (122). The valve core assembly (12) also includes a valve stem (127), on which an air passage (128) is provided. The valve stem (127) is slidably disposed in the sliding chamber (122), and the drive shaft (13) is movably connected to the valve stem (127).

10. A structure for adjusting the height of a subway car according to claim 9, characterized in that, A rubber gasket (1261) is provided on the sealing gasket (126).

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