A straddle-type monorail vehicle and a single-axle bogie thereof

Abstract

The present invention discloses a straddle-type monorail vehicle and a single-axle bogie thereof, wherein the single-axle bogie comprises a frame, a left radial oil cylinder and a right radial oil cylinder symmetrically arranged between the frame and the vehicle body, and a left-turn supporting wheel set and a right-turn supporting wheel set respectively arranged on the frame; all left buffer oil cylinders of the left-turn supporting wheel set are connected to the left radial oil cylinder, and all right buffer oil cylinders of the right-turn supporting wheel set are connected to the right radial oil cylinder. The present invention uses the left buffer oil cylinder and the right buffer oil cylinder to control one of the left radial oil cylinder and the right radial oil cylinder to automatically extend and the other to automatically retract in a manner with minimum energy consumption, so as to stably support the vehicle body for turning, reduce the side slip angle and side slip force generated when the frame turns, and simultaneously adjust the preload force of the left-turn supporting wheel set and the right-turn supporting wheel set, so that the preload force remains stable within a certain range, thereby effectively improving the lateral stability of the vehicle body when turning.

Description

Technical Field

[0001] The invention relates to the field of straddle-type monorail vehicles, and in particular to a straddle-type monorail vehicle and a single-axle bogie thereof. Background Art

[0002] Straddle-type monorail vehicles usually travel on elevated dedicated rail beams. They have the advantages of strong adaptability, strong climbing ability, and less ground resource occupation, and have broad application prospects. The bogies of straddle-type monorail vehicles are mainly of two types: double-axle and single-axle. Among them, although the double-axle bogie has a strong carrying capacity, it has defects such as the inability to automatically center the wheels on a straight line and the large wheel angle on a curve, which causes a surge in tire wear. The single-axle bogie includes a pair of running wheels, four guide wheels and two stabilizing wheels. There is no angle of attack when passing through a curve, and the tire wear is very small, which can make up for the above-mentioned defects.

[0003] For a straddle-type monorail vehicle, its body is directly located on the secondary suspension. When the body passes through a curve, it needs to rely on the longitudinal deformation of the secondary suspension to adapt to the rotation angle between the body and the bogie. The secondary suspension will produce a rotation constraint on the single-axle bogie, so that the running wheels cannot be in a radial position when passing through a curve. In this way, the running wheels will produce a sideslip angle and sideslip force, and the radial force on the guide wheels will also increase, resulting in poor lateral stability of the body when passing through a curve. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a straddle-type monorail vehicle and a single-axle bogie thereof, wherein all left buffer cylinders are connected to the left radial cylinders, and all right buffer cylinders are connected to the right radial cylinders, so as to control the active extension and retraction of the left radial cylinders and the right radial cylinders in a manner of minimum energy consumption to support the steering of the vehicle body, and simultaneously adjust the preload of the left-turn supporting wheel group and the right-turn supporting wheel group to improve the lateral stability of the vehicle body when turning.

[0005] The single-axle bogie of the straddle-type monorail vehicle provided by the present invention comprises:

[0006] Framework;

[0007] A left radial oil cylinder and a right radial oil cylinder symmetrically arranged between the frame and the vehicle body;

[0008] A left-turn supporting wheel set and a right-turn supporting wheel set respectively arranged on the frame;

[0009] All left buffer cylinders of the left-turn supporting wheel group are connected to the left radial cylinder, and all right buffer cylinders of the right-turn supporting wheel group are connected to the right radial cylinder;

[0010] When the vehicle body turns left, the preload force of the left-turn supporting wheel set increases, the piston rods of all left buffer cylinders retract, the oil in the rodless chambers of all left buffer cylinders flows to the rodless chambers of the left radial cylinders, and the piston rods of the left radial cylinders extend; the preload force of the right-turn supporting wheel set decreases, the oil in the rodless chamber of the right radial cylinder flows into the rodless chambers of all right buffer cylinders, the piston rods of the right radial cylinders retract, and the piston rods of all right buffer cylinders extend;

[0011] When the vehicle body turns right, the preload force of the right turn support wheel group increases, the piston rods of all right buffer cylinders retract, the oil in the rodless chamber of all right buffer cylinders flows to the rodless chamber of the right radial cylinder, and the piston rod of the right radial cylinder extends; the preload force of the left turn support wheel group decreases, the oil in the rodless chamber of the left radial cylinder flows into the rodless chamber of all left buffer cylinders, the piston rod of the left radial cylinder retracts, and the piston rods of all left buffer cylinders extend.

[0012] Preferably, it also includes:

[0013] A left switching valve provided between any left buffer cylinder and the left radial cylinder;

[0014] A pressure detection device for detecting the current pressure of the rodless chamber of the left buffer cylinder;

[0015] A control device connected to the pressure detection device and the left switching valve respectively;

[0016] When the current pressure of any left buffer cylinder exceeds the maximum pressure, the control device controls the left switching valve to switch to the first position according to the signal fed back by the pressure detection device, and the rodless chamber of any left buffer cylinder is connected with the rodless chamber of the left radial cylinder, and the rod chamber of any left buffer cylinder is connected with the rod chamber of the left radial cylinder;

[0017] When the current pressure of any left buffer cylinder reaches the initial set pressure, the control device controls the left switching valve to switch to the second position according to the signal feedback from the pressure detection device, and the rodless chamber and the rod chamber of the radial cylinder are connected to the rodless chamber of any left buffer cylinder.

[0018] Preferably, it also includes:

[0019] Accumulator;

[0020] An oil replenishing valve provided between any left buffer cylinder and the accumulator;

[0021] The oil replenishing valve is connected to the control device. When the control device obtains the pressure fluctuation value according to the signal feedback from the pressure detection device, when the pressure fluctuation value exceeds the preset fluctuation value, the control device controls the left switching valve to switch to the third position, and the rod chamber of the left radial cylinder is connected to the rodless chamber of any left buffer cylinder; and at the same time, the oil replenishing valve is controlled to open, and the accumulator replenishes oil for any left buffer cylinder.

[0022] Preferably, any left buffer cylinder and any right buffer cylinder are provided with a locking valve;

[0023] When the current pressure of the rodless chamber of any left buffer cylinder is lower than the safety threshold, the control device controls the locking valve to remain closed;

[0024] When the current pressure of the rodless chamber of any left buffer oil cylinder exceeds the safety threshold, the control device controls the locking valve to open, and the oil flows from the rodless chamber of any left buffer oil cylinder into the accumulator;

[0025] When the current pressure of the rodless chamber of any left buffer oil cylinder is lower than the initial setting pressure, the control device controls the locking valve to open, and the oil flows from the accumulator into the rodless chamber of any left buffer oil cylinder;

[0026] and,

[0027] When the current pressure of the rodless chamber of any right buffer cylinder is lower than the safety threshold, the control device controls the locking valve to remain closed;

[0028] When the current pressure of the rodless chamber of any right buffer oil cylinder exceeds the safety threshold, the control device controls the locking valve to open, and the oil flows from the rodless chamber of any right buffer oil cylinder into the accumulator;

[0029] When the current pressure of the rodless chamber of any right buffer cylinder is lower than the initial pressure, the control device controls the locking valve to open, and the oil flows from the accumulator into the rodless chamber of any right buffer cylinder.

[0030] Preferably, a mounting groove is provided at the center of the rear end of the frame, and the frame further comprises a traction mechanism and a rotating shaft crossing the mounting groove, wherein the traction mechanism comprises an upper traction rod and a lower traction rod respectively hinged to both ends of the rotating shaft.

[0031] Preferably, it also includes:

[0032] An upper bearing seat and a lower bearing seat respectively arranged at both ends of the rotating shaft;

[0033] An upper vibration damping seat and a lower vibration damping seat respectively fixed on two opposite sides of the mounting groove;

[0034] Wherein, a preset gap is maintained between the damping buffer block of the upper vibration damping seat and the upper bearing seat, and between the damping buffer block of the lower vibration damping seat and the lower bearing seat.

[0035] Preferably, it also includes:

[0036] An upper connecting seat and a lower connecting seat respectively fixed to two ends of the rotating shaft;

[0037] An upper torsional vibration damper sleeved on the rotating shaft and located between the upper connecting seat and the frame;

[0038] A lower torsional vibration damper sleeved on the rotating shaft and located between the lower connecting seat and the frame;

[0039] The upper connecting seat and the upper traction rod as well as the lower connecting seat and the lower traction rod are hingedly connected via a rubber ball hinge.

[0040] Preferably, the left-turn supporting wheel group includes a front left guide wheel, a rear right guide wheel and a left stabilizing wheel, all of which have wheel axles passing through their centers, and a wheel bracket is fixedly provided on the frame, both ends of the wheel axle are hinged to the wheel bracket, the piston rod of the left buffer cylinder is hinged to the end of the wheel axle, and its cylinder barrel is fixedly connected to the wheel bracket.

[0041] Preferably, a mounting interface is fixedly provided on the outer wall of the cylinder, a wheel elastic member is sleeved on the cylinder, and two ends of the wheel elastic member are respectively abutted against the wheel bracket and the mounting interface.

[0042] The straddle-type monorail vehicle provided by the present invention comprises the single-axle bogie described in any one of the above items.

[0043] Compared with the background technology, the single-axle bogie of the straddle-type monorail vehicle provided by the present invention comprises a frame, a left radial oil cylinder, a right radial oil cylinder, a left-turn supporting wheel set and a right-turn supporting wheel set, wherein the left radial oil cylinder and the right radial oil cylinder are symmetrically arranged between the frame and the vehicle body. All left buffer oil cylinders of the left-turn supporting wheel set are connected to the left radial oil cylinder, and all right buffer oil cylinders of the right-turn supporting wheel set are connected to the right radial oil cylinder.

[0044] When the vehicle body turns left, the interaction force between the left turn support wheel group and the track beam increases, the preload force of the left turn support wheel group increases, the piston rods of all left buffer cylinders retract, the oil in the rodless chamber of all left buffer cylinders flows to the rodless chamber of the left radial cylinder, the piston rod of the left radial cylinder extends, and the preload force of the left turn support wheel group decreases accordingly; at the same time, the interaction force between the right turn support wheel group and the track beam decreases, the preload force of the right turn support wheel group decreases, the oil in the rodless chamber of the right radial cylinder flows into the rodless chamber of all right buffer cylinders, the piston rod of the right radial cylinder retracts, the piston rods of all right buffer cylinders extend, and the preload force of the right turn support wheel group increases accordingly.

[0045] When the vehicle body turns right, the interaction force between the right turn support wheel group and the track beam increases, the preload force of the right turn support wheel group increases, the piston rods of all right buffer cylinders retract, the oil in the rodless chamber of all right buffer cylinders flows to the rodless chamber of the right radial cylinder, and the piston rod of the right radial cylinder extends; at the same time, the interaction force between the left turn support wheel group and the track beam decreases, the preload force of the left turn support wheel group decreases, the oil in the rodless chamber of the left radial cylinder flows into the rodless chamber of all left buffer cylinders, the piston rod of the left radial cylinder retracts, the piston rods of all left buffer cylinders extend, and the preload force of the left turn support wheel group increases accordingly.

[0046] To sum up, when the vehicle body turns, the present invention uses the left buffer cylinder and the right buffer cylinder to control one of the left radial cylinder and the right radial cylinder to automatically extend and the other to automatically retract in a manner with minimal energy consumption, so as to stably support the steering of the vehicle body, reduce the sideslip angle and sideslip force generated when the frame turns, and simultaneously adjust the preload force of the left turn support wheel group and the right turn support wheel group to maintain the preload force stable within a certain range, thereby effectively improving the lateral stability of the vehicle body when turning.

[0047] The straddle-type monorail vehicle provided by the present invention, including the above-mentioned single-axle bogie, has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0049] Figure 1 A state diagram of a single-axle bogie of a straddle-type monorail vehicle when turning left provided by a specific embodiment of the present invention;

[0050] Figure 2 A structural diagram of a single-axle bogie of a straddle-type monorail vehicle provided in a specific embodiment of the present invention;

[0051] Figure 3 for Figure 2 Side view of

[0052] Figure 4 for Figure 1 The connection diagram of the left buffer cylinder and the left radial cylinder;

[0053] Figure 5 for Figure 1 A side view of the middle traction mechanism;

[0054] Figure 6 for Figure 5 The main view of

[0055] Figure 7 for Figure 6 Assembly drawing of the intermediate shaft, upper torsional vibration damper and lower torsional vibration damper;

[0056] Figure 8 for Figure 1 The front view of the middle front left guide wheel;

[0057] Fig. 9 for Figure 8 Top view of the .

[0058] The reference numerals are as follows:

[0059] Frame 10, mounting groove 101, running wheel 11, left radial cylinder 12, left radial cylinder 13, front left guide wheel 141, rear right guide wheel 142, left stabilizing wheel 143, wheel bracket 144, wheel elastic member 145, front right guide wheel 151, rear left guide wheel 152, right stabilizing wheel 153, left buffer cylinder 16, left switching valve 17, locking valve 18, traction mechanism 19, upper traction rod 191, lower traction rod 192, rotating shaft 20, upper bearing seat 21, lower bearing seat 22, upper damping seat 23, lower damping seat 24, upper connecting seat 25, lower connecting seat 26, upper torsional vibration damper 27, lower torsional vibration damper 28, longitudinal spring 281, transverse spring 282, rubber ball joint 29, secondary suspension 30, vertical vibration damper 301, transverse vibration damper 302, hourglass spring 303 and spare oil tank 31. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0062] Please refer to Figures 1 to 4 , Figure 1 A state diagram of a single-axle bogie of a straddle-type monorail vehicle when turning left provided by a specific embodiment of the present invention; Figure 2 A structural diagram of a single-axle bogie of a straddle-type monorail vehicle provided in a specific embodiment of the present invention; Figure 3 for Figure 2 Side view of Figure 4 for Figure 1 Connection diagram between the center left buffer cylinder and the left radial cylinder.

[0063] The embodiment of the present invention discloses a single-axle bogie of a straddle-type monorail vehicle, which is suitable for the monorail vehicle body to travel at high speed along a track beam with a small curvature radius, and includes a frame 10, a left radial cylinder 12, a left radial cylinder 13, a left-turn supporting wheel group and a right-turn supporting wheel group.

[0064] A running wheel 11 is installed at the center of the frame 10, and the running wheel 11 rolls along the running surface of the track beam. The structure of the frame 10 can be specifically referred to the prior art.

[0065] The left radial cylinder 12 and the left radial cylinder 13 are both installed at the rear end of the frame 10, symmetrically arranged between the frame 10 and the car body, and are used to assist the car body in steering, so that the running wheels 11 of the single-axle bogie are more radial when turning, reducing wear and improving the curve passing performance of the car body.

[0066] It should be noted that the intersection point formed by the line connecting the left radial cylinder 12 and the left radial cylinder 13 and the frame 10 is located at the vertical center line of the frame 10, so as to avoid the single-axle bogie from pitching instability caused by the extension and contraction of the left radial cylinder 12 and the left radial cylinder 13. The left radial cylinder 12 and the left radial cylinder 13 use joint bearings to connect the frame 10 and the car body, which are only used for radial adjustment of the single-axle bogie and do not bear traction.

[0067] The left-turn support wheel group and the right-turn support wheel group are respectively arranged on the frame 10. When the vehicle body turns left, the force between the left-turn support wheel group and the side of the track beam increases. When the vehicle body turns right, the force between the right-turn support wheel group and the side of the track beam increases. The left-turn support wheel group includes a front left guide wheel 141, a rear right guide wheel 142 and a left stabilizing wheel 143. The right-turn support wheel group includes a front right guide wheel 151, a rear left guide wheel 152 and a right stabilizing wheel 153, which are used for support. The running wheel 11, the four guide wheels and the two stabilizing wheels are all rubber tires, and the four guide wheels and the two stabilizing wheels are pre-pressed to be close to the side of the track beam. The structures of the guide wheels and the stabilizing wheels are consistent, and only the installation position on the frame 10 is not passed. The guide wheels are installed on the bottom side of the frame 10, mainly for guiding. The stabilizing wheels are installed on the two support beams of the frame 10 to prevent the vehicle body from tilting.

[0068] Among them, each of the front left guide wheel 141, the rear right guide wheel 142 and the left stabilizing wheel 143 is provided with a left buffer cylinder 16, and all the left buffer cylinders 16 of the left-turn supporting wheel group are connected to the left radial cylinder 12, so that the hydraulic energy of the left radial cylinder 12 comes from each left buffer cylinder 16. Each of the front right guide wheel 151, the rear left guide wheel 152 and the right stabilizing wheel 153 is provided with a right buffer cylinder, and all the right buffer cylinders of the right-turn supporting wheel group are connected to the left radial cylinder 13, so that the hydraulic energy of the left radial cylinder 13 comes from each right buffer cylinder. In this way, the present invention can actively adjust the telescopic length of the left radial cylinder 12 and the left radial cylinder 13 in a way of minimum energy consumption, ensure the radial position of the single-axle bogie when turning, avoid the eccentric wear of the running wheel 11, or the detoxification wear of the guide wheel and the stabilizing wheel, and can actively adjust the preload of the left-turn supporting wheel group and the right-turn supporting wheel group, so that the preload is maintained within a certain range and maintained stable, thereby improving the lateral stability of the vehicle body.

[0069] When the vehicle body turns left, the interaction force between the left turn support wheel group and the track beam increases, the preload force of the left turn support wheel group increases, the piston rods of all left buffer cylinders 16 retract, the oil in the rodless chamber of all left buffer cylinders 16 flows to the rodless chamber of the left radial cylinder 12, the piston rod of the left radial cylinder 12 extends, and the preload force of the left turn support wheel group decreases until it returns to the initial preset value; at the same time, the interaction force between the right turn support wheel group and the track beam decreases, the preload force of the right turn support wheel group decreases, the oil in the rodless chamber of the left radial cylinder 13 flows into the rodless chamber of all right buffer cylinders, the piston rod of the left radial cylinder 13 retracts, the piston rods of all right buffer cylinders extend, and the preload force of the right turn support wheel group increases accordingly.

[0070] When the vehicle body turns right, the interaction force between the right turn supporting wheel group and the track beam increases, the preload force of the right turn supporting wheel group increases, the piston rods of all right buffer cylinders retract, the oil in the rodless chamber of all right buffer cylinders flows to the rodless chamber of the left radial cylinder 13, and the piston rod of the left radial cylinder 13 extends; at the same time, the interaction force between the left turn supporting wheel group and the track beam decreases, the preload force of the left turn supporting wheel group decreases, the oil in the rodless chamber of the left radial cylinder 12 flows into the rodless chamber of all left buffer cylinders 16, the piston rod of the left radial cylinder 12 retracts, the piston rods of all left buffer cylinders 16 extend, and the preload force of the left turn supporting wheel group increases accordingly.

[0071] To sum up, when the vehicle body turns, the present invention uses the left buffer cylinder 16 and the right buffer cylinder, without the need for a hydraulic pump to supply pressure, and controls one of the left radial cylinder 12 and the left radial cylinder 13 to automatically extend and the other to automatically retract in a manner with minimal energy consumption, so as to stably support the vehicle body turning, reduce the sideslip angle and sideslip force generated when the frame 10 turns, and simultaneously adjust the preload force of the left turn support wheel group and the right turn support wheel group, so that the preload force remains stable within a certain range, thereby effectively improving the lateral stability of the vehicle body when turning.

[0072] The above-mentioned single-axle bogie further includes a left switching valve 17, a pressure detection device and a control device. A left switching valve 17 is provided between any left buffer oil cylinder 16 and the left radial oil cylinder 12, and is used to switch the oil flow direction between any left buffer oil cylinder 16 and the left radial oil cylinder 12. The left switching valve 17 is specifically a three-position four-way electromagnetic reversing valve. The pressure detection device is used to detect the current pressure of the rodless chamber of the left buffer oil cylinder 16, and can specifically be a pressure sensor. The control device is connected to the pressure detection device and the left switching valve 17 respectively.

[0073] When the vehicle body turns left, the preload force of the left-turn supporting wheel set increases, and the pressure of the rodless chamber of any left buffer cylinder 16 increases. When the current pressure of the rodless chamber of any left buffer cylinder 16 exceeds the maximum pressure, the control device controls the left switching valve 17 to switch to the first position according to the signal fed back by the pressure detection device, and the rodless chamber of any left buffer cylinder 16 is connected to the rodless chamber of the left radial cylinder 12, and the rod chamber of any left buffer cylinder 16 is connected to the rod chamber of the left radial cylinder 12. The oil in the rodless chamber of any left buffer cylinder 16 flows to the rodless chamber of the left radial cylinder 12, and the oil in the rod chamber of the left radial cylinder 12 flows to the rod chamber of any left buffer cylinder 16. The piston rod of the left radial cylinder 12 extends, and the piston rod of any left buffer cylinder 16 retracts, and the preload force of the left-turn supporting wheel set decreases. It should be noted that the maximum pressure in the text refers to the maximum pressure of the rodless chamber of any left buffer cylinder 16, which can be 5Mpa specifically.

[0074] Since the oil in the rodless chamber of any left buffer cylinder 16 flows to the rodless chamber of the left radial cylinder 12, the pressure of the rodless chamber of any left buffer cylinder 16 decreases. When the current pressure of the rodless chamber of any left buffer cylinder 16 reaches the initial pressure, the control device controls the left switching valve 17 to switch to the second position, that is, the middle position, according to the signal fed back by the pressure detection device. The rodless chamber and the rod chamber of the radial cylinder are connected to the rodless chamber of any left buffer cylinder 16 to avoid the increase of the compression of the wheel elastic member 145 due to the excessively low pressure of the rodless chamber of any left buffer cylinder 16, thereby avoiding the excessive roll angle between the frame 10 and the vehicle body, which is beneficial to improving the comfort and safety of passengers when standing in the vehicle body. The initial pressure in the text refers to the initial pressure of the rodless chamber of any left buffer cylinder 16, which can be 3Mpa specifically.

[0075] Similarly, there is a right switching valve between any right buffer cylinder and the left radial cylinder 13, and the rodless chamber of the right buffer cylinder is also provided with a pressure detection device. When the vehicle body turns left, the preload force of the right turn support wheel set is reduced, and the pressure of the rodless chamber of any right buffer cylinder is reduced. When the current pressure of the rodless chamber of any left buffer cylinder 16 exceeds the maximum pressure, the control device controls the right switching valve to switch to the first position according to the signal feedback from the pressure detection device, and the rodless chamber of any right buffer cylinder is connected to the rodless chamber of the left radial cylinder 13, and the rod chamber of any right buffer cylinder is connected to the rod chamber of the left radial cylinder 13. The oil in the rodless chamber of the left radial cylinder 13 flows to the rodless chamber of any right buffer cylinder, and the oil in the rod chamber of any right buffer cylinder flows to the rod chamber of the left radial cylinder 13. The piston rod of the left radial cylinder 13 retracts, and the piston rod of any right buffer cylinder extends, and the preload force of the right turn support wheel set increases.

[0076] When the vehicle body turns right, the control principles of the left switching valve 17 and the right switching valve are similar to the above content and will not be described in detail here.

[0077] The above-mentioned single-axle bogie also includes an accumulator and an oil replenishing valve. All left buffer cylinders 16 and all right buffer cylinders are connected to the accumulator. The oil replenishing valve is arranged between any left buffer cylinder 16 and the accumulator, and can be a solenoid ball valve specifically, which is used to control the oil circuit between the two. The oil replenishing valve is connected to the control device.

[0078] When the vehicle body is in a crosswind or other working condition, the center of gravity of the vehicle body will swing back and forth, the single-axle bogie will roll continuously, and the pressure of the rodless chamber of all left buffer cylinders 16 will fluctuate. When the pressure fluctuation value of the rodless chamber of any left buffer cylinder 16 exceeds the preset fluctuation value, the control device obtains the pressure fluctuation value according to the signal fed back by the pressure detection device, controls the left switching valve 17 to switch to the third position, and the rod chamber of the left radial cylinder 12 is connected to the rodless chamber of any left buffer cylinder 16; at the same time, the control device controls the oil replenishment valve to open, and the accumulator replenishes oil for any left buffer cylinder 16, and replenishes oil for the left radial cylinder 12 at the same time, increasing the preload force of the left turn support wheel set. In addition, a throttle valve is also provided between any left buffer cylinder 16 and the accumulator to adjust the flow rate of the oil, and then adjust the action speed of all left buffer cylinders 16. Of course, an oil replenishment valve connected to the control device can also be provided between any right buffer cylinder and the accumulator, and automatic oil replenishment can also be achieved. Please refer to the above content for details. The preset fluctuation value in this article may specifically be 1Mpa.

[0079] Special attention should be paid to the following points: when the vehicle body turns left, the rodless chamber pressure of all left buffer oil cylinders 16 can be increased to 5Mpa first, and when the pressure fluctuation value of the rodless chamber of all left buffer oil cylinders 16 is restored to within 0.5Mpa, the rodless chamber pressure of all left buffer oil cylinders 16 of the guide wheels of the left-turn supporting wheel group can be reduced to 3Mpa, and after a delay of 10S, the rodless chamber pressure of all left buffer oil cylinders 16 of the stabilizing wheels of the left-turn supporting wheel group can be reduced to 3Mpa, so as to ensure that the vehicle body can still maintain good stability and safety under unexpected working conditions such as strong wind or failure of the secondary suspension 30 damping. Of course, when the vehicle body turns right, the control principle of all right buffer oil cylinders is similar, which will not be repeated here.

[0080] Any left buffer cylinder 16 and any right buffer cylinder are provided with a locking valve 18. The left radial cylinder 12 and the left radial cylinder 13 are also provided with a locking valve 18, and have the same effect.

[0081] When the vehicle body is traveling in a straight line, the current pressure of the rodless chamber of any left buffer oil cylinder 16 is lower than the safety threshold, and the current pressure of the rodless chamber of any right buffer oil cylinder is also lower than the safety threshold. The control device controls the locking valves 18 of all left buffer oil cylinders 16 to remain closed, and at the same time controls the locking valves 18 of all right buffer oil cylinders to remain closed, without oil flow, and the preload force of the left turn support wheel group and the preload force of the right turn support wheel group do not produce large fluctuations, avoiding the single-axle bogie from shaking and becoming unstable. The safety threshold in the text can be 8Mpa.

[0082] When a large foreign object appears on the side of the track beam, the left-turn supporting wheel set and the right-turn supporting wheel set contact the foreign object, which will cause the pressure of the rodless chamber of the left buffer oil cylinder 16 or the rodless chamber of the right buffer oil cylinder to increase. When the current pressure of the rodless chamber of any left buffer oil cylinder 16 exceeds the safety threshold, the control device controls the locking valve 18 to open, and the oil flows from the rodless chamber of any left buffer oil cylinder 16 into the accumulator, thereby reducing the preload force of the left-turn supporting wheel set. When the current pressure of the rodless chamber of any right buffer oil cylinder exceeds the safety threshold, the control device controls the locking valve 18 to open, and the oil flows from the rodless chamber of any right buffer oil cylinder into the accumulator, thereby reducing the preload force of the right-turn supporting wheel set. After the left-turn supporting wheel set or the right-turn supporting wheel set passes the foreign object, the pressure of the rodless chamber of the left buffer oil cylinder 16 or the rodless chamber of the right buffer oil cylinder drops sharply. When the pressure is lower than the initial pressure, the accumulator reverses to replenish the oil for the rodless chamber of the left buffer oil cylinder 16 or the rodless chamber of the right buffer oil cylinder to increase the preload force.

[0083] When a pit appears on the side of the track beam, the pressure of the rodless chamber of the left buffer cylinder 16 or the rodless chamber of the right buffer cylinder will decrease when the left-turn supporting wheel set and the right-turn supporting wheel set pass through the pit. When the current pressure of the rodless chamber of any left buffer cylinder 16 is lower than the initial pressure, the control device controls the locking valve 18 to open, and the oil flows from the accumulator into the rodless chamber of any left buffer cylinder 16, replenishing the oil to the target buffer cylinder, thereby increasing the preload force of the left-turn supporting wheel set. When the current pressure of the rodless chamber of any right buffer cylinder is lower than the initial pressure, the control device controls the locking valve 18 to open, and the oil flows from the accumulator into the rodless chamber of any right buffer cylinder, thereby increasing the preload force of the right-turn supporting wheel set.

[0084] In addition, when the hydraulic pipeline is damaged, the pressure of the rodless chamber of the left buffer cylinder 16 or the rodless chamber of the right buffer cylinder will also decrease. When it is lower than 1Mpa or below, the hydraulic energy cannot be transmitted to the left radial cylinder 12 or the left radial cylinder 13. At this time, the accumulator releases oil to replenish the target buffer cylinder to ensure that the single-axle bogie can turn normally. When the pressure of the accumulator is lower than the lower limit, the emergency power unit and the spare oil tank 31 are replenished with oil to maintain the pressure of the accumulator between the upper limit and the lower limit.

[0085] The vehicle body has different speeds when turning, and the load state of the vehicle is also inconsistent. Therefore, the increase or decrease of the preload force of each guide wheel and each stabilizing wheel is inconsistent, which leads to inconsistent working force of the left radial cylinder 12 and the left radial cylinder 13. An electromagnetic pressure regulating valve is provided between any left buffer cylinder 16 and the accumulator, and between any right buffer cylinder and the accumulator. When the increment of the preload force of each guide wheel and each stabilizing wheel is not enough for the left radial cylinder 12 or the left radial cylinder 13 to push the single-axis axial frame to complete the steering action, the accumulator can replenish oil to the target buffer cylinder through the electromagnetic pressure regulating valve. The pressure of the electromagnetic pressure regulating valve gradually rises from the minimum to the maximum. When the pressure detection device detects that the rodless chamber pressure of the target buffer cylinder increases, the pressure setting value of the electromagnetic pressure regulating valve gradually decreases.

[0086] When the vehicle body is urgently started or braked, the longitudinal displacement of the vehicle body relative to the single-axle bogie will cause the pressure of the left radial cylinder 12 or the left radial cylinder 13 to increase, and the oil will overflow into the accumulator to store energy.

[0087] The frame 10 is connected to the vehicle body through the secondary suspension 30, which includes a vertical shock absorber 301, a lateral shock absorber 302, and an hourglass spring 303. The installation methods and working principles of the three can refer to the prior art. Among them, the vertical shock absorber 301 and the lateral shock absorber 302 can be replaced by magnetorheological dampers, and the hourglass spring 303 can be replaced by an air spring.

[0088] Please refer to Figure 6 and Figure 7 , Figure 6 for Figure 5 The main view of Figure 7 for Figure 6 Assembly diagram of the intermediate shaft, upper torsional vibration damper and lower torsional vibration damper.

[0089] The above-mentioned single-axle bogie also includes a traction mechanism 19, which is arranged at the rear end of the frame 10. The left radial cylinder 12 and the left radial cylinder 13 can act as shock absorbers, and together with the traction mechanism 19, ensure the longitudinal stability of the vehicle body. The single-axle bogie is connected to the vehicle body through the secondary suspension 30, the left radial cylinder 12, the left radial cylinder 13 and the traction mechanism 19.

[0090] A mounting groove 101 is provided at the rear end center of the frame 10, and the above-mentioned single-axle bogie also includes a rotating shaft 20 that crosses the mounting groove 101. The traction mechanism 19 adopts a double traction rod, including an upper traction rod 191 and a lower traction rod 192 that are respectively hinged to the two ends of the rotating shaft 20. The upper traction rod 191 and the lower traction rod 192 are parallel and distributed up and down.

[0091] The above-mentioned single-axle bogie also includes an upper bearing seat 21, a lower bearing seat 22, an upper damping seat 23 and a lower damping seat 24, wherein the upper bearing seat 21 and the lower bearing seat 22 are respectively arranged at both ends of the rotating shaft 20, and both the upper bearing seat 21 and the lower bearing seat 22 are provided with joint bearings, and the rotating shaft 20 passes through the inner hole of the joint bearing. The upper damping seat 23 and the lower damping seat 24 are respectively fixed on two opposite sides of the mounting groove 101. The upper damping seat 23 includes a connecting support and a damping buffer block, and the connecting support is fixed to the inner side wall of the mounting groove 101 by bolts. The damping buffer block of the upper damping seat 23 is opposite to the upper bearing seat 21, and is used to absorb the buffering vibration of the upper bearing seat 21. Similarly, the damping buffer block of the lower damping seat 24 is opposite to the lower bearing seat 22, and is used to absorb the buffering vibration of the lower bearing seat 22. It should be noted that a preset gap is maintained between the damping buffer block of the upper shock absorber seat 23 and the upper bearing seat 21, and between the damping buffer block of the lower shock absorber seat 24 and the lower bearing seat 22, so as to avoid the deterioration of vertical stability and complex force on the traction mechanism 19 due to the mismatch of dynamic parameters between the secondary suspension 30 and the traction mechanism 19.

[0092] The above-mentioned single-axle bogie also includes an upper connecting seat 25, a lower connecting seat 26, an upper torsion damper 27 and a lower torsion damper 28. The upper connecting seat 25 and the lower connecting seat 26 are respectively fixed to the two ends of the rotating shaft 20, and both can be traction rubber piles. One end of the upper traction rod 191 is connected to the car body through a key bearing, and the other end is hingedly connected to the upper connecting seat 25 through a rubber ball joint 29. Similarly, one end of the lower traction rod 192 is also connected to the car body through a key bearing, and the other end is hingedly connected to the lower connecting seat 26 through a rubber ball joint 29.

[0093] The upper torsional vibration damper 27 is sleeved on the rotating shaft 20 and is located between the upper connecting seat 25 and the frame 10. The lower torsional vibration damper 28 is also sleeved on the rotating shaft 20 and is located between the lower connecting seat 26 and the frame 10. The structures and working principles of the upper torsional vibration damper 27 and the lower torsional vibration damper 28 can be specifically referred to the prior art. The upper torsional vibration damper and the rotating shaft 20 and the upper connecting seat 25 and the rotating shaft 20 are both connected by keys, and the upper torsional vibration damper and the upper connecting seat 25 share a connecting key. Similarly, the lower torsional vibration damper and the rotating shaft 20 and the lower connecting seat 26 and the rotating shaft 20 are also connected by keys, and the lower torsional vibration damper and the lower connecting seat 26 also share a connecting key.

[0094] The torsion damper and damping seat added to the traction mechanism 19 can suppress and buffer the shaking and nodding movements of the vehicle body. For example, when the single-axle bogie appears in a nodding posture, the longitudinal springs 281 of the upper torsion damper 27 and the lower torsion damper 28 produce longitudinal displacement, and the upper connecting seat 25 and the lower connecting seat 26 both produce a torsion angle, so as to absorb the load generated by the nodding. When the vehicle body appears in a swaying and shaking posture, the transverse springs 282 and the longitudinal springs 281 of the upper torsion damper 27 and the lower torsion damper 28 both produce displacement, and the upper connecting seat 25 and the lower connecting seat 26 also produce a torsion angle, so as to absorb the load generated by the swaying and shaking.

[0095] Please refer to Figure 7 and Figure 8 , Figure 8 for Figure 1 The front view of the middle front left guide wheel; Fig. 9 for Figure 8 Top view of the .

[0096] The left-turn support wheel group includes a front left guide wheel 141, a rear right guide wheel 142 and a left stabilizing wheel 143, the centers of which are all provided with a wheel axle, a wheel bracket 144 is fixedly provided on the frame 10, and both ends of the wheel axle are hinged to the wheel bracket 144, and the piston rod of the left buffer cylinder 16 is hinged to the end of the wheel axle, and its cylinder is fixedly connected to the wheel bracket 144. The setting of the left buffer cylinder 16 ensures that each guide wheel and each stabilizing wheel does not need to be replaced with the help of complicated tooling and equipment. It is only necessary to connect a pressure supply tool such as a manual pump to the reversing valve interface of the target replacement wheel. After the left buffer cylinder 16 is pressurized, the left buffer cylinder 16 retracts, so that the tread does not contact the track beam, and it is convenient to replace the damaged guide wheel or stabilizing wheel. In addition, when the left buffer cylinder 16 cannot be extended and retracted due to a malfunction of the left radial cylinder 12 or the left radial cylinder 13, the left buffer cylinder 16 acts as an oil pressure shock absorber, which plays a role in buffering and vibration reduction. When the vehicle body turns, the hydraulic rod of the left buffer cylinder 16 is back-pressed, and after the pressure in the rodless chamber rises to a specified pressure, the pressure relief circuit of the locking valve 18 completes the pressure relief, keeping the left buffer cylinder 16 and its hydraulic accessories from being damaged due to the fault condition. Of course, the installation method of each wheel in the left-turn supporting wheel group can refer to the left-turn supporting wheel group, and the installation method of the right buffer cylinder is the same as that of the left buffer cylinder 16. The two have the same functions, and the aforementioned content can be referred to.

[0097] The outer wall of the cylinder is fixed with a mounting interface, and a wheel elastic member 145 is sleeved on the cylinder. The two ends of the wheel elastic member 145 are respectively against the wheel bracket 144 and the mounting interface, further improving the vibration reduction performance of each guide wheel and each stabilizing wheel.

[0098] The straddle-type monorail vehicle provided by the present invention, including the above-mentioned single-axle bogie, has the same beneficial effects.

[0099] The straddle-type monorail vehicle and the single-axle bogie provided by the present invention are introduced in detail above. The principle and implementation mode of the present invention are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A single-axle bogie for a straddle-type monorail vehicle, It is characterized in that include: Framework (10); A left radial oil cylinder (12) and a right radial oil cylinder (13) symmetrically arranged between the frame (10) and the vehicle body; A left-turn supporting wheel group and a right-turn supporting wheel group respectively arranged on the frame (10); All left buffer cylinders (16) of the left-turn supporting wheel group are connected to the left radial cylinder (12), and all right buffer cylinders of the right-turn supporting wheel group are connected to the right radial cylinder (13); When the vehicle body turns left, the preload force of the left-turn supporting wheel set increases, the piston rods of all the left buffer cylinders (16) retract, the oil in the rodless chambers of all the left buffer cylinders (16) flow to the rodless chambers of the left radial cylinders (12), and the piston rods of the left radial cylinders (12) extend; the preload force of the right-turn supporting wheel set decreases, the oil in the rodless chambers of the right radial cylinders (13) flow into the rodless chambers of all the right buffer cylinders, the piston rods of the right radial cylinders (13) retract, and the piston rods of all the right buffer cylinders extend; When the vehicle body turns right, the preload force of the right-turn supporting wheel group increases, the piston rods of all the right buffer cylinders retract, and the oil in the rodless chambers of all the right buffer cylinders flows to the rodless chambers of the right radial cylinders (13), and the piston rods of the right radial cylinders (13) extend; the preload force of the left-turn supporting wheel group decreases, the oil in the rodless chamber of the left radial cylinder (12) flows into the rodless chambers of all the left buffer cylinders (16), the piston rods of the left radial cylinders (12) retract, and the piston rods of all the left buffer cylinders (16) extend; A left switching valve (17) provided between any one of the left buffer cylinders (16) and the left radial cylinder (12); A pressure detection device for detecting the current pressure of the rodless chamber of the left buffer oil cylinder (16); a control device connected to the pressure detection device and the left switching valve (17) respectively; When the current pressure of any of the left buffer cylinders (16) exceeds the maximum pressure, the control device controls the left switching valve (17) to switch to the first position according to the signal fed back by the pressure detection device, and the rodless chamber of any of the left buffer cylinders (16) is connected to the rodless chamber of the left radial cylinder (12), and the rod chamber of any of the left buffer cylinders (16) is connected to the rod chamber of the left radial cylinder (12); When the current pressure of any of the left buffer oil cylinders (16) reaches the initial set pressure, the control device controls the left switching valve (17) to switch to the second position according to the signal fed back by the pressure detection device, and the rodless chamber and the rod chamber of the radial oil cylinder are both connected to the rodless chamber of any of the left buffer oil cylinders (16); Accumulator; An oil replenishing valve provided between any one of the left buffer oil cylinders (16) and the accumulator; The oil replenishing valve is connected to the control device. When the control device obtains the pressure fluctuation value according to the signal fed back by the pressure detection device, when the pressure fluctuation value exceeds the preset fluctuation value, the control device controls the left switching valve (17) to switch to the third position, and the rod chamber of the left radial oil cylinder (12) is connected to the rodless chamber of any left buffer oil cylinder (16); and at the same time, the oil replenishing valve is controlled to open, and the accumulator replenishes oil for any left buffer oil cylinder (16); Any of the left buffer oil cylinders (16) and any of the right buffer oil cylinders are provided with a locking valve (18); When the current pressure of the rodless chamber of any left buffer cylinder (16) is lower than a safety threshold, the control device controls the locking valve (18) to remain closed; When the current pressure of the rodless chamber of any of the left buffer oil cylinders (16) exceeds the safety threshold, the control device controls the locking valve (18) to open, and oil flows from the rodless chamber of any of the left buffer oil cylinders (16) into the accumulator; When the current pressure of the rodless chamber of any of the left buffer oil cylinders (16) is lower than the initial pressure, the control device controls the locking valve (18) to open, and the oil flows from the accumulator into the rodless chamber of any of the left buffer oil cylinders (16); and, When the current pressure of the rodless chamber of any of the right buffer cylinders is lower than the safety threshold, the control device controls the locking valve (18) to remain closed; When the current pressure of the rodless chamber of any of the right buffer oil cylinders exceeds the safety threshold, the control device controls the locking valve (18) to open, and the oil flows from the rodless chamber of any of the right buffer oil cylinders into the accumulator; When the current pressure of the rodless chamber of any of the right buffer cylinders is lower than the initial pressure, the control device controls the locking valve (18) to open, and the oil flows from the accumulator into the rodless chamber of any of the right buffer cylinders.

2. The single-axle bogie of the straddle-type monorail vehicle according to claim 1, It is characterized in that The frame (10) is provided with a mounting groove (101) at the center of the rear end thereof, and further comprises a traction mechanism (19) and a rotating shaft (20) crossing the mounting groove (101); the traction mechanism (19) comprises an upper traction rod (191) and a lower traction rod (192) respectively hinged to two ends of the rotating shaft (20).

3. The single-axle bogie of the straddle-type monorail vehicle according to claim 2, It is characterized in that Also includes: An upper bearing seat (21) and a lower bearing seat (22) respectively arranged at two ends of the rotating shaft (20); An upper vibration damping seat (23) and a lower vibration damping seat (24) respectively fixed on two opposite sides of the mounting groove (101); Wherein, a preset gap is maintained between the damping buffer block of the upper vibration damping seat (23) and the upper bearing seat (21), and between the damping buffer block of the lower vibration damping seat (24) and the lower bearing seat (22).

4. The single-axle bogie of the straddle-type monorail vehicle according to claim 2, It is characterized in that Also includes: An upper connecting seat (25) and a lower connecting seat (26) respectively fixed to two ends of the rotating shaft (20); an upper torsional vibration damper (27) sleeved on the rotating shaft (20) and located between the upper connecting seat (25) and the frame (10); a lower torsional vibration damper (28) sleeved on the rotating shaft (20) and located between the lower connecting seat (26) and the frame (10); The upper connecting seat (25) and the upper traction rod (191) as well as the lower connecting seat (26) and the lower traction rod (192) are both hingedly connected via a rubber ball joint (29).

5. The single-axle bogie of the straddle-type monorail vehicle according to claim 1, It is characterized in that The left-turn supporting wheel group comprises a front left guide wheel (141), a rear right guide wheel (142) and a left stabilizing wheel (143), the centers of the three wheels are all provided with a wheel axle, the frame (10) is fixedly provided with a wheel bracket (144), both ends of the wheel axle are hinged to the wheel bracket (144), the piston rod of the left buffer oil cylinder (16) is hinged to the end of the wheel axle, and its cylinder is fixedly connected to the wheel bracket (144).

6. The single-axle bogie of the straddle-type monorail vehicle according to claim 5, It is characterized in that The outer wall of the cylinder is fixedly provided with a mounting interface, and a wheel elastic member (145) is sleeved on the cylinder, and two ends of the wheel elastic member (145) respectively abut against the wheel bracket (144) and the mounting interface.

7. A straddle-type monorail vehicle, It is characterized in that A single-axle bogie comprising the single-axle bogie described in any one of claims 1 to 6.

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