CN109367562B - Combined type energy-absorbing anti-creeper for railway vehicle - Google Patents

Abstract

The invention discloses a combined energy-absorbing anti-climb device for rail vehicles, which includes a piston rod, a cylinder, a flange and a cooling pipe. Cooling liquid is provided in the cylinder, and one end of the cylinder is connected to one side of the flange. The flange is provided with a guide hole that is in sliding contact with the piston rod. The end of the piston rod is provided with a piston that is in sliding contact with the inner wall of the cylinder. A cutting tool is installed on the other side of the flange. The cutting tool extends to the guide groove on the piston rod. Inside, the cooling pipe is unidirectionally led from the cylinder to the installation position of the cutting tool. The present invention uses coolant to cool the tool, which reduces the probability of the tool melting during the cutting process and improves the reliability of the cutting tool. At the same time, because the cutting part pushes the piston to squeeze the coolant in the cylinder, the train may occur. Part of the kinetic energy during the collision is converted into the kinetic energy and pressure energy of the coolant, reducing the probability of tool breakage.

Description

A combined energy-absorbing anti-climb device for rail vehicles

Technical field

The invention relates to the field of rail transit buffering and energy absorption, and in particular to a combined rail vehicle energy absorption and anti-climb device.

Background technique

With the rapid development of the rail transit industry, while improving the active safety of trains, the passive safety performance of rail vehicles is also receiving more and more attention. When a train collides at a high speed, a huge acceleration pulse will be generated, causing the train to arch, climb, roll over and other serious damage phenomena, causing the colliding vehicle to undergo large deformation and greatly reducing the passenger living space. In order to reduce the damage to the car body and the injuries to the passengers in train collision accidents, large energy-absorbing and high-efficiency anti-climb devices are usually installed in the limited space at both ends of the train.

The currently commonly used energy-absorbing anti-climb devices for cutting, planing, and broaching have the following shortcomings: (1) strict requirements on processing technology, and the workpiece has higher requirements on the tool; (2) the temperature of the tool is relatively high when cutting the workpiece High, resulting in severe tool melting and poor tool reliability; (3) The impact force during the initial cutting process is large and the tool is easily broken; (4) There are certain fluctuations in the smooth cutting process, and the anti-climb device has poor anti-eccentric load performance.

Contents of the invention

The purpose of the present invention is to provide a combined energy-absorbing anti-climb device for rail vehicles, thereby solving the above problems.

In order to achieve the above object, the present invention discloses a combined energy-absorbing anti-climb device for rail vehicles, which includes a piston rod, a cylinder, a flange and a cooling pipe. Cooling liquid is provided in the cylinder, and one end of the cylinder Connected to one side of the flange, the flange is provided with a guide hole that is in sliding contact with the piston rod. The end of the piston rod is provided with a piston that is in sliding contact with the inner wall of the cylinder. The flange is A cutting tool for cutting the piston rod is installed on the other side. The cutting tool extends into the guide groove on the piston rod. The cooling pipe is unidirectionally led from the cylinder to the cutting tool. Installation location.

Further, the end of the cooling pipe away from the flange is connected to the cylinder.

A one-way valve is installed on the wall of the cylinder, one end of the cooling pipe is connected to the one-way valve, and the other end is set toward the tip of the cutting tool.

Further, the piston rod is provided with a guide groove, and the cutting tool extends into the guide groove. Along the cutting direction of the cutting tool, the tip of the cutting tool is aligned with the tip of the piston rod. The cutting positions are spaced apart so that the cutting tool starts cutting after the coolant is ejected.

Furthermore, the other end of the piston rod away from the piston is provided with anti-climbing teeth.

Furthermore, the piston rod is a hollow rod structure with a hollow interior.

Further, the other end of the cylinder is fixed on a mounting base, and the mounting base is provided with mounting holes.

Compared with the prior art, the advantages of the present invention are:

The present invention uses coolant to cool the tool, which reduces the probability of the tool melting during the cutting process and improves the reliability of the cutting tool. At the same time, because the cutting part pushes the piston to squeeze the coolant in the cylinder, the train may occur. Part of the kinetic energy during the collision is converted into the kinetic energy and pressure energy of the coolant, which reduces the impact load during the initial cutting process, ensures the smooth progress of the cutting process, and reduces the probability of tool breakage. At the same time, the cut metal parts become piston rods and enter the inside of the cylinder, which improves the offset load resistance of the cutting energy-absorbing device and ensures the crashworthiness of the rail vehicle.

The present invention will be described in further detail below with reference to the accompanying drawings.

Description of the drawings

The drawings forming a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a schematic structural diagram of a combined energy-absorbing anti-climb device for rail vehicles disclosed in an embodiment of the present invention;

Figure 2 is a schematic exploded view of the combined energy-absorbing anti-climb device for rail vehicles disclosed in the embodiment of the present invention;

Figure 3 is a schematic structural diagram of an anti-tooth climbing component disclosed in an embodiment of the present invention;

Figure 4 is a cross-sectional view of the anti-climbing component disclosed in the embodiment of the present invention;

Figure 5 is a first structural schematic diagram of the flange assembly disclosed in the embodiment of the present invention;

Figure 6 is a second structural schematic diagram of the flange assembly disclosed in the embodiment of the present invention;

Figure 7 is a schematic structural diagram of a hydraulic cylinder block disclosed in an embodiment of the present invention.

illustration:

1. Anti-climbing tooth parts; 11. Anti-climbing teeth; 12. Piston rod; 13. Guide groove; 14. Piston; 15. Groove seam;

2. Flange assembly; 21. Flange; 22. Cutting tool; 23. Tool mounting slot; 24. Guide hole;

3. Cooling pipe;

4. Cylinder body parts; 41. Cylinder body; 42. Bolt holes of flange base; 43. Flange base; 44. One-way valve;

5. Install base; 51. Install base plate; 52. Installation holes.

Detailed ways

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

As shown in Figures 1 to 7, the present invention discloses a combined energy-absorbing anti-climb device for rail vehicles, which mainly consists of an anti-climb tooth component 1, a flange component 2, a cooling pipe 3, a cylinder component 4 and a mounting base 5 , among which, the anti-climbing tooth component 1 includes an anti-climbing tooth 11, a piston rod 12 and a piston 14. The mounting bottom plate 51 of the mounting base 5 has four mounting holes 52 for installing bolts evenly distributed around the circumference. The entire anti-climbing device passes through The mounting holes 52 are connected to the vehicle chassis. Among them, the anti-climbing teeth 11 and the piston 14 are arranged at both ends of the piston rod 12. The anti-climbing teeth 11 are arranged on the metal plate. There are four anti-climbing teeth 11 in parallel. In this embodiment, in order to reduce the friction of the entire anti-climbing device, The weight of the piston rod 12 is designed as a hollow rod structure with a hollow interior. The piston rod 12 is also a component to be cut, and a guide groove 13 is provided on the wall of the piston rod 12 . The mounting base 5 and the flange assembly 2 are sealed and installed at both ends of the cylinder component 4. The cylinder component 4 includes a cylinder 41. The cylinder 41 is continuously filled with coolant. One end of the cylinder 41 passes through the mounting base 5 To seal, the other end is fixedly connected with a flange base 43, and the flange base 43 is provided with flange base bolt holes 42, so that the flange assembly 2 and the cylinder component 4 are sealed and installed through bolts. The flange assembly 2 includes a flange 21 and a cutting tool 22. A guide hole 24 is provided in the center of the flange 21. The radius size of the flange 21 is the same as the radius size of the cylinder flange base 43. The guide hole 24 is the same size as the piston 14 . When a train collision occurs, the guide hole 24 can ensure that the piston 14 moves stably in the direction of the installation base 5, making the cutting energy absorption process more stable and improving the stability and offset load resistance of the anti-climb device.

In this embodiment, the flange 21 is provided with four tool mounting grooves 23 along the circumferential edge of the guide hole 24. A cutting tool 22 is fastened with screws in the tool mounting grooves 23, and the cutting tool tip 22 is directed toward the guide. The center of the hole 24 extends. When specifically matched, the piston rod 12 is in sealing and sliding contact with the guide hole 24. The tips of the cutting tools 22 are inserted into the guide groove 13, and the piston 14 is slidably connected in the cylinder 41, in which the guide The groove 13 is located above the piston 14,

At the same time, one-way valves 44 are installed on the end of the cylinder 41 away from the flange 21. Four one-way valves 44 are evenly distributed along the circumferential direction of the cylinder 41, corresponding to the cutting tools 22 one by one. One end of the cooling pipe 3 is connected to the cylinder. The one-way valve 44 on the wall of the body 41 is connected, and the other end extends to the tip position of the cutting tool 22. The one-way valve 44 only allows communication from the inside of the cylinder 41 to the outside. When a train collides, the anti-climbing teeth 11 between the two vehicles bite and contact each other. The piston 14 at the end of the piston rod 12 responds by starting to squeeze the coolant in the cylinder 41. Under the action of pressure, the side of the cylinder 41 will be The one-way valve 44 on the wall opens, allowing the coolant to quickly spray from the cooling pipe 3 to the cutting tool 22. Then, the cutting tool 22 can stably cut the metal on the piston rod 12. After cutting, the piston rod 12 continues to move toward the cylinder 41. The bottom movement of the cutting tool 22 reduces the temperature of the cutting tool 22 during the cutting buffering and energy absorption process, and reduces the probability of the cutting tool 22 melting. The cylinder component 4 not only has the effect of hydraulic buffering and energy absorption, but also can complete the The effective cooling of the cutting tool 22 not only combines the hydraulic buffer energy absorption and cutting energy absorption into one, increasing the energy system efficiency, but also can timely cool the cutting energy absorption position to prevent the occurrence of tool melting, achieving "1 +1>2” significant effect.

The size of the end of the guide groove 13 matches the cutting tool 22. When specifically set, the length of the guide hole 24 of the cutting tool 22 protruding from the tool mounting groove 23 is equal to the depth of the guide groove 13, and the width of the cutting tool 22 is equal to or slightly smaller than the guide hole 24. The width of the groove 13, that is, a transitional or smaller interference fit between the cutting tool 22 and the guide groove 13, can ensure that when the cutting tool 22 cuts the piston rod 12, it can cut stably in the longitudinal direction, thereby improving the stability of the device. The setting of the guide groove 13 can prevent the cutting tool 22 from breaking due to sudden excessive force, ensures the cutting direction of the cutting process and the force balance of the four cutting tools 22, reduces the vibration of the anti-climb device during the cutting process, and improves the device stability.

At the same time, due to the squeezing effect of the piston 14 when the train collides, the coolant in the cylinder 41 is squeezed and flows out from the one-way valve 44, and then is sprayed to the cutting tool 22 through the cooling pipe 3. During the collision, Part of the mechanical energy is converted into the cutting energy and heat energy generated by the cutting tool 22 cutting the piston rod 12, and the other part is converted into the kinetic energy and pressure energy of the coolant. They work together and complement each other. While improving the effect of buffering and energy absorption, the cutting tool is also protected. twenty two.

In this embodiment, since there is a certain vibration when the train is running normally, the one-way valve 44 can ensure that the coolant will not overflow from the cylinder 41 to the cooling pipe 3 when the train is running normally. Only when a train collision occurs, the one-way valve 44 will open when the pressure threshold is reached under the action of hydraulic pressure, causing the coolant to spray from the cooling pipe 3 to the cutting tool 22. At this time, the pressure threshold and the cooling pipe 3 also play a role. It is similar to the effect of damping holes in buffering and absorbing energy.

At the same time, in order to reduce the impact load during the initial cutting process and ensure the smooth progress of the cutting process, along the cutting direction of the cutting tool 22, the tip of the cutting tool 22 is separated from the position to be cut by the piston rod 12 by a certain distance, that is, the piston rod 12 The tip of the cutting tool 22 will not touch the cut metal on the piston rod 12 until it runs a certain distance toward the mounting base 5, so that the cutting tool 22 starts cutting after the coolant is ejected, thus reducing the initial cutting time. impact load during the process, and also better protects the cutting tool 22.

In this embodiment, groove slits 15 are provided on both sides of the guide groove 13 , and the groove slits 15 extend along the cutting direction of the cutting tool 22 , that is, the groove slits 15 face the piston rod 12 along both sides of the guide groove 13 . The circumferential extension of the cutting tool ensures that the tool cuts the specified metal along the specified path, that is, only cuts the metal between the two relative groove slits 15, thereby making the cutting process more controllable.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (7)

1. A combined energy-absorbing anti-climb device for rail vehicles, characterized in that it includes a piston rod (12), a cylinder (41), a flange (21) and a cooling pipe (3). The cylinder (41) Coolant is provided inside, and one end of the cylinder (41) is connected to one side of the flange (21). The flange (21) is provided with a guide hole that is in sliding contact with the piston rod (12). (24), the end of the piston rod (12) is provided with a piston (14) that is in sliding contact with the inner wall of the cylinder (41), and the other side of the flange (21) is equipped with a cutting piston rod. For the cutting tool (22) of (12), the cooling pipe (3) is unidirectionally led from the inside of the cylinder (41) to the installation position of the cutting tool (22). 2. The combined energy-absorbing anti-climb device for rail vehicles according to claim 1, characterized in that the end of the cooling pipe (3) away from the flange (21) is connected to the cylinder (41). Connected. 3. The combined energy-absorbing anti-climb device for rail vehicles according to claim 2, characterized in that a one-way valve (44) is installed on the wall of the cylinder (41), and the cooling pipe (3) One end is connected to the one-way valve (44), and the other end is set toward the tip of the cutting tool (22). 4. The combined energy-absorbing anti-climb device for rail vehicles according to any one of claims 1 to 3, characterized in that the piston rod (12) is provided with a guide groove (13), and the cutting tool (22) Extending into the guide groove (13), along the cutting direction of the cutting tool (22), the tip of the cutting tool (22) is separated from the position to be cut by the piston rod (12). , so that the cutting tool (22) starts cutting after the coolant is ejected. 5. The combined energy-absorbing anti-climb device for rail vehicles according to claim 4, characterized in that the other end of the piston rod (12) away from the piston (14) is provided with anti-climb teeth (11). 6. The combined energy-absorbing anti-climb device for rail vehicles according to claim 5, characterized in that the piston rod (12) is a hollow rod structure with a hollow interior. 7. The combined energy-absorbing anti-climb device for rail vehicles according to claim 6, characterized in that the other end of the cylinder (41) is fixedly connected to a mounting base (5), and the mounting base (5 ) is provided with mounting holes (52).