CN214196841U - Buffer cylinder for low-floor tramcar anti-bending system - Google Patents
Buffer cylinder for low-floor tramcar anti-bending system Download PDFInfo
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- CN214196841U CN214196841U CN202023001779.9U CN202023001779U CN214196841U CN 214196841 U CN214196841 U CN 214196841U CN 202023001779 U CN202023001779 U CN 202023001779U CN 214196841 U CN214196841 U CN 214196841U
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Abstract
The utility model provides a buffer cylinder for a low-floor tramcar anti-bending system, a bidirectional piston rod and piston rod guide supporting seats positioned at two ends of the piston rod are arranged in a cylinder body, spring outer guide sleeves are arranged at two ends of the cylinder body, a spring pressure seat and a spring supporting seat which are coaxial are sequentially arranged in the spring outer guide sleeve along the direction far away from the piston rod guide supporting seat, the hydraulic buffer comprises a spring pressing seat, a spring supporting seat, a bidirectional piston rod, a piston rod guiding supporting seat, a spring supporting seat, a butterfly spring, an oil port, a bidirectional sealing check ring, a multi-stage seal and a buffer cylinder, wherein the butterfly spring is arranged between the spring pressing seat and the spring supporting seat, the sliding end of the bidirectional piston rod penetrates through the piston rod guiding supporting seat and then is connected with the spring pressing seat, the cylinder body is provided with the oil port which is correspondingly communicated with an internal oil cavity, the oil port and the internal oil cavity are connected with an incoming oil circuit and an outgoing oil circuit between a front bogie and a rear bogie respectively, the bidirectional piston rod is provided with the bidirectional sealing check ring, the multi-stage seal is adopted between the piston rod guiding supporting seat and the cylinder body as well as between the piston rod and the bidirectional piston rod, and the buffer cylinder is also provided with an internal transition oil accumulation groove and an external oil storage groove. The technology reduces the pressure peak value of the system during working, reduces the vibration impact caused by the vehicle body, and improves the driving comfort.
Description
Technical Field
The utility model relates to a rail vehicle technical field especially relates to a cushion cylinder structure that is used for low-floor tram to prevent system of bending.
Background
The distance between the floor and the rail surface of the low-floor tramcar is only 35 cm, a platform facility is not needed, the maximum transportation capacity is 6-8 times that of the bus, the vehicle adopts the storage battery and the super capacitor to be mixed with power in parallel, the full-line non-touch-screen scheme is provided, the climbing capacity is strong, and the minimum turning radius is only 19 meters. Compared with the common touch-screen type tramcar, the low-floor tramcar has the obvious advantages of low development investment, short development time, no limitation of a power grid, wide applicable region, convenience for passengers to get on and off, operation cost and energy conservation and the like, and is the most 'green' vehicle at present.
The rail vehicle generates a reset moment by means of a running mechanism which rotates by means of a torsion spring on a curve under a normal running mode, the front vehicle body and the rear vehicle body which are connected by a connecting rod are linked under the action of the reset moment, the connecting rod can rotate and increase the transverse force borne by a wheel rim, and once the rotation and the transverse force exceed the vehicle limit, the front vehicle body and the rear vehicle body can be bent relatively, so that a bogie for bearing the vehicle bodies is damaged, and the driving safety is influenced.
Therefore, the anti-bending system is developed, and aims to realize the smooth transition of the action between the front vehicle body and the rear vehicle body by transmitting the quick displacement from the previous bogie to the next bogie in a delayed manner, so that the buffer cylinder is the most important part in the whole anti-bending system, the transfer quantity of the hydraulic oil is required, the tassel of the hydraulic oil cannot be too fast, and the tightness and the safety of an oil way are ensured. This puts high demands on the construction of the damping cylinder.
Currently, no cushion cylinder product specially designed for the anti-bending system is available in the industry.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rigidity adjustability is good, the leakproofness is reliable, long service life's hydraulic oil cushion cylinder to solve the problem of background art.
In order to achieve the purpose, the utility model provides a buffer cylinder for low-floor tram anti-bending system, including cylinder body, two-way piston rod, piston rod direction supporting seat, disc spring, the outer uide bushing of spring, spring pressure seat and spring supporting seat.
The cylinder body is of a cylindrical structure, two ends of the cylinder body in the length direction are opened, the bidirectional piston rod is arranged in the cylinder body and can slide along the length direction of the bidirectional piston rod, the piston rod guiding supporting seats are arranged at two ends of the bidirectional piston rod in the sliding direction and are fixedly connected with the inner wall of the cylinder body, the spring outer guide sleeve is arranged at the two ends of the opening of the cylinder body and is matched with the piston rod guide supporting seat after being fixedly connected with the opening of the cylinder body to form a cavity for containing the belleville spring, the spring pressing seat and the spring supporting seat, the spring pressing seat and the spring supporting seat are sequentially arranged along the direction far away from the piston rod guide supporting seat and are coaxially arranged, the spring pressing seat can be arranged in a sliding way, the butterfly spring and the bidirectional piston rod are arranged in the same direction in a sliding way, two ends of the butterfly spring are respectively connected with the opposite ends of the spring supporting seat and the spring pressing seat, the other end of the spring pressing seat is connected with the part of the bidirectional piston rod penetrating out of the piston rod guide supporting seat.
The inner space of the cylinder body is divided into two oil cavities by a bidirectional piston rod, the bidirectional piston rod moves in a reciprocating mode under the action of butterfly springs and spring pressing seats at two ends to adjust the volume of the two oil cavities, communicated oil ports are arranged on the cylinder body corresponding to each oil cavity, one oil port is connected with an incoming oil path between a front bogie and a rear bogie, and the other oil port is connected with an outgoing oil path between the front bogie and the rear bogie.
Preferably, a lattice ring is arranged at the position where the piston on the bidirectional piston rod is contacted with the inner wall of the cylinder body, and the lattice ring adopts polytetrafluoroethylene with an O-shaped rubber ring as a force application element to realize bidirectional sealing between the two oil cavities.
Preferably, the piston rod guide supporting seat is fixedly installed inside the cylinder body through a steel wire retaining ring for a shaft, a flat gasket and a steel wire retaining ring for a hole, and two O-shaped sealing rings are arranged between the piston rod guide supporting seat and the inner wall of the cylinder body to realize static sealing.
Preferably, a high-pressure sealing element and a low-pressure sealing element are arranged between the piston rod guide supporting seat and the bidirectional piston rod to realize high-pressure and low-pressure two-stage dynamic sealing, and a groove for installing the high-pressure sealing element and a circular groove and a thread for installing the low-pressure sealing element are machined on the surface of the piston rod guide supporting seat.
Preferably, the high-pressure sealing element is a T46T material steckel seal with an O-ring as the biasing element, and the low-pressure sealing element is a lip rubber seal with a skeleton and a spring as the elastic compensation.
Preferably, an annular transitional oil accumulation groove is arranged between the groove and the circular groove of the piston rod guide supporting seat.
Preferably, be equipped with annular oil storage tank on the cylinder body outer wall, be equipped with the oil storage lid on the oil storage tank, link firmly the realization to the oil storage tank sealed through oil storage lid and cylinder body outer wall, the oil storage tank is through leading oilhole and transition long-pending oil tank intercommunication.
Preferably, an exhaust port is arranged at the top of the cylinder body corresponding to each oil cavity, an exhaust screw is arranged at the exhaust port, a pressure breather valve is arranged at the top of the oil storage tank, an oil drainage port is arranged at the bottom of the oil storage tank, and an oil drainage screw is arranged at the oil drainage port.
Preferably, guide grooves are processed at the two sliding ends of the bidirectional piston rod, and a guide piece matched with the guide grooves is processed on the piston rod guide support seat; coaxial vent holes are formed in the bidirectional piston rod and the spring pressing seat, so that air at two ends of the buffer cylinder can circulate to keep air pressure balance.
Preferably, the spring outer guide sleeve is connected with the cylinder body through threads.
The utility model provides a technical scheme has following beneficial effect at least:
adopt the utility model provides a cushion cylinder, can come from the large-traffic of preceding bogie control hydro-cylinder through shunting partly, the hydraulic oil of high pressure gets into an oil pocket (high-pressure chamber) of cushion cylinder, the pressure peak value of high-pressure oil circuit has been slowed down, and when the control hydro-cylinder of bogie after the high-pressure chamber oil circuit slowly gets into through the choke valve, pressure slowly reduces, the cushion cylinder is slowly discharged the fluid in high-pressure chamber to balanced position through compression spring's restoring force, make this oil circuit volume resume to balanced position, thereby realized on the quick displacement time delay of last bogie transmits next bogie, the system operating pressure peak value has been reduced, the vibration impact of low-floor tram has been reduced, make the travelling comfort of driving obtain improving.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts, wherein:
fig. 1 is a schematic structural view of a cushion cylinder for a low-low floor tramcar anti-bending system in embodiment 1 of the present invention;
FIG. 2 is an enlarged view of the structure of the cylinder portion of FIG. 1;
wherein: the device comprises a cylinder body 1, a bidirectional piston rod 2, a piston rod guide supporting seat 3, a butterfly spring 4, a spring outer guide sleeve 5, a spring pressing seat 6, a spring supporting seat 7, a check ring 8, a high-pressure sealing element 9, a low-pressure sealing element 10, a transition oil accumulation groove 11, an oil storage groove 12, an oil storage cover 13, an exhaust screw 14, a pressure breather valve 15, an oil drainage screw 16, a first oil port 17 and a second oil port 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 and 2, the buffer cylinder for the low-floor tramcar anti-bending system comprises a cylinder body 1, a bidirectional piston rod 2, a piston rod guide supporting seat 3, a belleville spring 4, a spring outer guide sleeve 5, a spring pressing seat 6 and a spring supporting seat 7.
The cylinder body 1 is of a cylindrical structure and is provided with two end openings in the length direction, the bidirectional piston rod 2 is arranged in the cylinder body 1 and can slide along the length direction of the bidirectional piston rod, the piston rod guide supporting seats 3 are arranged at two ends of the sliding direction of the bidirectional piston rod 2 and are fixedly connected with the inner wall of the cylinder body 1, the spring outer guide sleeves 5 are arranged at two ends of the opening of the cylinder body 1 and are matched with the piston rod guide supporting seats 3 after being fixedly connected with the two ends of the opening of the cylinder body 1 to form a cavity for accommodating the disc spring 4, the spring pressing seat 6 and the spring supporting seats 7 are sequentially arranged along the direction far away from the piston rod guide supporting seats 3 and are coaxially arranged, the spring pressing seat 6 can be arranged in a sliding manner, the disc spring 4 and the sliding direction of the bidirectional piston rod 2 are arranged in the same direction, two ends of the disc spring pressing And (6) connecting.
The inner space of the cylinder body 1 is divided into two oil chambers by a bidirectional piston rod 2, the bidirectional piston rod 2 reciprocates under the action of belleville springs 4 and spring pressure seats 6 at two ends to adjust the volume of the two oil chambers, and communicated oil ports, namely a first oil port 17 and a second oil port 18, are arranged on the cylinder body 1 corresponding to each oil chamber, wherein the first oil port 17 is connected with an incoming oil path between a front bogie and a rear bogie, and the second oil port 18 is connected with an outgoing oil path between the front bogie and the rear bogie.
The bidirectional piston rod is characterized in that a lattice ring 8 is arranged at the position, in contact with the inner wall of the cylinder body 1, of the piston on the bidirectional piston rod 1, the lattice ring 8 is made of polytetrafluoroethylene with an O-shaped rubber ring as a force application element to realize bidirectional sealing between two oil cavities, and the fact that no internal leakage exists between the two oil cavities in the operation process of the piston rod is guaranteed.
Piston rod direction supporting seat 3 is through axle steel wire retaining ring, flat pad and hole steel wire retaining ring fixed mounting inside cylinder body 1, the equipment and the maintenance of the cushion cylinder of being convenient for. Two O-shaped sealing rings are arranged between the piston rod guide supporting seat 3 and the inner wall of the cylinder body 1 to realize static sealing, and no external leakage between the piston rod guide supporting seat and the cylinder body is ensured.
The piston rod guide support structure is characterized in that a high-pressure sealing element 9 and a low-pressure sealing element 10 are arranged between the piston rod guide support seat 3 and the bidirectional piston rod 2 to realize high-pressure and low-pressure two-stage dynamic sealing, a groove for mounting the high-pressure sealing element 9 and a circular groove and a thread for mounting the low-pressure sealing element 10 are machined on the surface of the piston rod guide support seat 3, and the low-pressure sealing element 10 is tightly pressed and mounted in the circular groove through a screw cap.
In the embodiment, the high-pressure sealing element adopts a steckel seal made of T46T material and provided with an O-shaped ring as a force application element, and the low-pressure sealing element 10 adopts a lip rubber sealing ring with a skeleton and a spring as elastic compensation, so that the sealing reliability is ensured doubly.
An annular transitional oil accumulation groove 11 is arranged between the groove and the circular groove of the piston rod guide supporting seat 3. Be equipped with annular oil storage tank 12 on the outer wall of cylinder body 1, be equipped with oil storage lid 13 on the oil storage tank 12, link firmly through oil storage lid 13 and cylinder body outer wall and realize the sealed to the oil storage tank, oil storage tank 12 leads the oilhole and the oil groove 11 intercommunication that passes through that the setting is inside piston rod direction supporting seat 3 and in the 1 lateral wall of cylinder body.
A small amount of high-pressure oil firstly flows into the transition oil accumulation groove 11 after the high-pressure seal leakage, and then is continuously conducted to the oil storage groove 12 for storage, and the leakage of the low-pressure seal part caused by the sealing failure of the low-pressure seal part is further avoided by the structural design so as to form high pressure in the accumulation between the high-pressure seal part and the low-pressure seal part, thereby ensuring the zero external leakage of the buffer cylinder.
The top of the cylinder body 1 is provided with an exhaust port corresponding to each oil cavity, an exhaust screw 14 is arranged at the exhaust port, the top of the oil storage tank 12 is provided with a pressure breather valve 15 for adjusting the pressure in the oil storage tank 12, the bottom of the oil storage tank 12 is provided with an oil drainage port, and an oil drainage screw 16 is arranged at the oil drainage port.
Guide grooves are processed at the two sliding ends of the bidirectional piston rod 2, and guide pieces matched with the guide grooves are processed on the piston rod guide supporting seat 3, so that the assembly coaxiality of the bidirectional piston rod and the cylinder body is improved, and the running stability of the buffer cylinder is ensured.
Coaxial vent holes are formed in the bidirectional piston rod 2 and the spring pressing seat 6, so that air at two ends of the buffer cylinder can circulate, and air pressure balance in the spring outer guide sleeves at two sides is realized.
In this embodiment, the surface of the bidirectional piston rod 2 is provided with a cermet ultrafine powder spraying layer to improve the wear-resisting life of the piston rod.
The spring outer guide sleeve 5 is connected with the cylinder body 1 through threads, the response pressure and the rigidity of the buffer cylinder can be adjusted by screwing the adjusting threads into the depth adjusting buffer cylinder, and the spring outer guide sleeve can be fixed through a set screw on the spring outer guide sleeve after the adjustment is finished.
The working principle of the buffer cylinder is as follows:
when the low-floor tramcar turns or vibrates transversely, the anti-bending system control oil cylinder of the front bogie quickly compresses large-flow hydraulic oil generated by displacement, the hydraulic oil flows to the anti-bending system control oil cylinder of the rear bogie after passing through the one-way valve, instantaneous high pressure is generated under the resistance action of the throttle valve, the hydraulic oil is divided into two paths, part of the hydraulic oil enters the rear bogie control oil cylinder through the damping valve to push the control oil cylinder to stretch, the rest of the hydraulic oil enters the first oil port of the buffer cylinder to enable the piston rod of the buffer cylinder to move rightwards, the volume of the oil path on the left side is increased, the pressure peak value is reduced, meanwhile, the spring on the right side of the buffer cylinder is compressed, and the buffer cylinder piston rod stops. The hydraulic oil at the position begins to drop along with the slow oil passing of the throttle valve, the oil liquid begins to flow out from the first oil port of the buffer cylinder and then enters the rear bogie control oil cylinder through the throttle valve, the control oil cylinder continues to stretch, and finally the piston rod of the buffer cylinder recovers centering, so that the oil liquid which is quickly displaced and generated by the control oil cylinder of the anti-bending system of the front bogie completely flows into the control oil cylinder of the backward moving bogie after being buffered by the buffer cylinder in a delayed manner, the vibration impact of the low-floor tramcar is buffered, and the driving comfort of the tramcar is improved.
The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any improvement or equivalent replacement made by utilizing the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields within the spirit and principle of the present invention, and shall be included in the scope of the present invention.
Claims (10)
1. A buffer cylinder for a low-floor tramcar anti-bending system is characterized by comprising a cylinder body (1), a bidirectional piston rod (2), a piston rod guide supporting seat (3), a belleville spring (4), a spring outer guide sleeve (5), a spring pressing seat (6) and a spring supporting seat (7);
the cylinder body (1) is of a cylindrical structure and is provided with two end openings in the length direction, the bidirectional piston rod (2) is arranged in the cylinder body (1) and can slide along the length direction of the bidirectional piston rod, the piston rod guide supporting seats (3) are arranged at two ends of the sliding direction of the bidirectional piston rod (2) and are fixedly connected with the inner wall of the cylinder body (1), the spring outer guide sleeve (5) is arranged at two ends of the opening of the cylinder body (1) and is matched with the piston rod guide supporting seats (3) to form a cavity for accommodating the belleville spring (4), the spring pressing seats (6) and the spring supporting seats (7), the belleville spring pressing seats (6) and the spring supporting seats (7) are sequentially arranged along the direction away from the piston rod guide supporting seats (3) and are coaxially arranged with the three, the spring pressing seats (6) can be arranged in a sliding mode, the belleville spring (4) and the bidirectional piston rod (2) are arranged in the same direction with 6) The other end of the spring pressing seat (6) is connected with the part of the bidirectional piston rod (2) penetrating out of the piston rod guide supporting seat (3);
the inner space of the cylinder body (1) is divided into two oil cavities by a bidirectional piston rod (2), the bidirectional piston rod (2) reciprocates under the action of belleville springs (4) and spring pressure seats (6) at two ends to adjust the volume of the two oil cavities, oil ports communicated with each oil cavity are arranged on the cylinder body (1) correspondingly, one oil port is connected with an incoming oil way between a front bogie and a rear bogie, and the other oil port is connected with an outgoing oil way between the front bogie and the rear bogie.
2. The cushion cylinder for the anti-bending system of the low-floor tram according to claim 1, characterized in that a gurley ring (8) is arranged at the position where the piston on the bidirectional piston rod (2) contacts with the inner wall of the cylinder body (1), and the gurley ring (8) adopts polytetrafluoroethylene with an O-shaped rubber ring as a force application element to realize bidirectional sealing between two oil cavities.
3. The cushion cylinder for the anti-bending system of the low-floor tram according to claim 2, characterized in that the piston rod guide support seat (3) is fixedly installed inside the cylinder body (1) through a steel wire retainer ring for a shaft, a flat gasket and a steel wire retainer ring for a hole, and two O-shaped seal rings are arranged between the piston rod guide support seat (3) and the inner wall of the cylinder body (1) to realize static seal.
4. The cushion cylinder for the anti-bending system of the low-floor tram according to claim 3, characterized in that a high-pressure sealing member (9) and a low-pressure sealing member (10) are arranged between the piston rod guide support seat (3) and the bidirectional piston rod (2) to realize high-pressure and low-pressure two-stage dynamic sealing, and a groove for installing the high-pressure sealing member (9) and a circular groove and a thread for installing the low-pressure sealing member (10) are processed on the surface of the piston rod guide support seat (3).
5. The cushion cylinder for the anti-buckling system of low-floor tram according to claim 4, characterized in that the high-pressure seal (9) is a T46T material steckel seal with O-ring as the forcing element, and the low-pressure seal (10) is a lip rubber seal with a skeleton with spring as the elastic compensation.
6. The cushion cylinder for the anti-buckling system of the low-floor tram according to claim 4, characterized in that an annular oil-accumulating transitional groove (11) is provided between the groove and the circular groove of the piston rod guide support seat (3).
7. The buffer cylinder for the low-floor tram anti-bending system according to claim 6, characterized in that an annular oil storage tank (12) is further arranged on the outer wall of the cylinder body (1), an oil storage cover (13) is arranged on the oil storage tank (12), the oil storage tank is sealed by fixedly connecting the oil storage cover (13) with the outer wall of the cylinder body, and the oil storage tank (12) is communicated with the transitional oil accumulation tank (11) through an oil guide hole.
8. The cushion cylinder for the low-floor tram anti-bending system according to claim 7, characterized in that an exhaust port is arranged at the top of the cylinder body (1) corresponding to each oil cavity, an exhaust screw (14) is arranged at the exhaust port, a pressure breather valve (15) is arranged at the top of the oil storage tank (12), an oil drainage port is arranged at the bottom of the oil storage tank (12), and an oil drainage screw (16) is arranged at the oil drainage port.
9. The cushion cylinder for the anti-bending system of the low-floor tram according to claim 8, characterized in that the two sliding ends of the two-way piston rod (2) are provided with guide grooves, and the piston rod guide support seat (3) is provided with a guide piece matched with the guide grooves; coaxial vent holes are formed in the bidirectional piston rod (2) and the spring pressing seat (6), so that air at two ends of the buffer cylinder can circulate to keep air pressure balance.
10. The cushion cylinder for the anti-buckling system of the low-floor tram according to claim 9, characterized in that the spring outer guide sleeve (5) is connected with the cylinder body (1) through a screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023001779.9U CN214196841U (en) | 2020-12-14 | 2020-12-14 | Buffer cylinder for low-floor tramcar anti-bending system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023001779.9U CN214196841U (en) | 2020-12-14 | 2020-12-14 | Buffer cylinder for low-floor tramcar anti-bending system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214196841U true CN214196841U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023001779.9U Active CN214196841U (en) | 2020-12-14 | 2020-12-14 | Buffer cylinder for low-floor tramcar anti-bending system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214196841U (en) |
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2020
- 2020-12-14 CN CN202023001779.9U patent/CN214196841U/en active Active
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