阅读说明：本技术 轨道车辆转向架用单螺栓连接中央牵引装置及其安装方法 (Single-bolt connection central traction device for railway vehicle bogie and installation method thereof ) 是由 黄先富 门永林 肖天宇 沙嵩 赵陆凯 杨明伟 于 2021-10-25 设计创作，主要内容包括：本发明属于轨道车辆转向架产品结构设计技术领域,具体涉及轨道车辆转向架用单螺栓连接中央牵引装置及其安装方法,包括中心销、牵引体、中心牵引节点、紧固板、防过充止挡、大螺栓,中心销的锥形牵引轴外壁呈锥形；锥形牵引轴底部的设置止转凸台；牵引体中部安装中心牵引节点,中心牵引节点的内钢套内壁为锥面,锥面与锥形牵引轴外壁形成锥面配合；紧固板设置于牵引体下方,紧固板顶面设置定位凹槽,定位凹槽与止转凸台配合,且定位凹槽与止转凸台垂向不贴合；防过充止挡与紧固板贴合并设置于紧固板下方；大螺栓对中心销和中心牵引节点进行紧固。本发明满足轨道车辆系统所需传递纵向力,适应车辆与转向架各向相对运动以及轨道车辆安全运行要求。(The invention belongs to the technical field of structural design of railway vehicle bogie products, and particularly relates to a single-bolt connection central traction device for a railway vehicle bogie and an installation method thereof, wherein the single-bolt connection central traction device comprises a central pin, a traction body, a central traction node, a fastening plate, an anti-overcharging stop and a large bolt, wherein the outer wall of a conical traction shaft of the central pin is conical; a rotation stopping boss is arranged at the bottom of the conical traction shaft; a central traction node is arranged in the middle of the traction body, the inner wall of an inner steel sleeve of the central traction node is a conical surface, and the conical surface is matched with the outer wall of the conical traction shaft in a conical manner; the fastening plate is arranged below the traction body, the top surface of the fastening plate is provided with a positioning groove, the positioning groove is matched with the rotation stopping boss, and the positioning groove is not vertically attached to the rotation stopping boss; the anti-overcharging backstop is attached to the fastening plate and arranged below the fastening plate; the large bolt fastens the central pin and the central traction node. The invention meets the requirement of a rail vehicle system on transmitting longitudinal force, and adapts to the requirements of the vehicle and the bogie on all-directional relative motion and the safe operation of the rail vehicle.)

1. A single bolted central draft gear for a railway vehicle truck comprising:

the center pin (1), the center pin (1) includes the mount table, conical draft shaft (19) and the rotation stopping boss (13); the mounting table is connected with the rail vehicle body through a plurality of bolts; the conical traction shaft (19) is arranged below the mounting table; the rotation stopping boss (13) is arranged at one end head of the conical traction shaft (19) far away from the mounting table;

the middle part of the traction body (7) is provided with an inner hole, and the traction body (7) is sleeved on the conical traction shaft (19) through the inner hole;

the central traction node (8) is arranged in the middle of the traction body (7), the central traction node (8) comprises an outer steel sleeve and an inner steel sleeve, the outer steel sleeve and an inner hole of the traction body (7) are in transition fit, the outer steel sleeve is arranged outside the inner steel sleeve, the inner wall of the inner steel sleeve is a conical surface, and the conical surface and the outer wall of the conical traction shaft (19) form conical surface fit;

the fastening plate (2) is arranged below the traction body (7), a positioning groove (20) is formed in the top surface of the fastening plate (2), the positioning groove (20) is matched with the rotation stopping boss (13) on the conical traction shaft (19), and the positioning groove (20) is not vertically attached to the rotation stopping boss (13) on the conical traction shaft (19);

the anti-overcharging stopper (3) is attached to the fastening plate (2) and arranged below the fastening plate (2);

a large bolt (6), the large bolt (6) fastening the fastening plate (2), the center pin (1) and the central traction node (8).

2. The single-bolt central draft gear for a railway car truck according to claim 1, wherein: the center pin (1) further comprises an oil filling opening (17) and an oil groove (18), wherein:

the oil filling port (17) is formed in the conical traction shaft (19);

the oil groove (18) is arranged below the oil filling port (17) and is formed in the conical traction shaft (19);

the oil filling port (17) is communicated with the oil groove (18).

3. The single bolt central draft gear for a railway car truck according to claim 2, wherein: the traction body (7) is provided with a traction pull rod mounting seat for mounting a traction pull rod (10) or a rubber pile mounting seat for mounting a rubber pile (11).

4. The single-bolt central draft gear for a railway car truck according to claim 3, wherein: the anti-overcharging stop catch (3) further comprises a limiting hole (21), and the limiting hole (21) is formed in the middle of the anti-overcharging stop catch (3).

5. The single-bolt central draft gear for a railway car truck according to claim 4, wherein: holes for the large bolts (6) to pass through are formed in the fastening plate (2) and the conical traction shaft (19) at positions coaxial with the limiting holes (21).

6. The single-bolt central draft gear for a railway car truck according to claim 5, wherein: the anti-loosening device is characterized by further comprising a second anti-loosening sheet (5) arranged between the large bolt (6) and the fastening plate (2), wherein the second anti-loosening sheet (5) is composed of a central circular ring and four lug plates, and the four lug plates are distributed on the outer circumferential edge of the central circular ring at intervals;

the ear plate has two states, a first state, in which the ear plate is deployed coplanar with the central ring; in the second state, the cocking of the ear plate is vertical to the surface of the central ring.

7. The single-bolt central draft gear for a railway car truck according to claim 6, wherein: the anti-loosening device is characterized by further comprising an anti-loosening groove (25), wherein the anti-loosening groove (25) is formed in the bottom of the fastening plate (2), and the second anti-loosening piece (5) is installed in the anti-loosening groove (25);

the lug plate in the first state is in contact with the rotation stopping groove (25);

the lug plate in the second state is attached to the side face of the head of the large bolt (6).

8. The single-bolt central draft gear for a railway car truck according to claim 7, wherein: at least one of the ear plates is in a first state; at least one of the ear plates is in a second state.

9. The single-bolt connection central traction device for the railway vehicle bogie as claimed in claim 8, wherein a withdrawal threaded hole (22) is formed in the bottom of the inner steel sleeve of the central traction node (8), and the diameter of the withdrawal threaded hole (22) is larger than the outer contour of the rotation stopping boss (13).

10. A method for installing a single-bolt connection central traction device for a railway vehicle bogie is characterized by comprising the following steps of: the mounting method is used for mounting the central traction device for the railway vehicle bogie with the single bolt connection according to claim 9, and comprises the following specific mounting steps:

s1, connecting the center pin (1) with the rail vehicle body through a fastener;

s2, matching the central traction node (8) with the traction body (7) in a press-fitting mode;

s3, mounting the traction pull rod (10) or the rubber pile (11) on the traction body (7) through a fastener;

s4, connecting the assembled traction body (7), the central traction node (8), the traction pull rod (10) or the rubber pile (11) with a bogie through fasteners;

s5, when the rail vehicle falls into a finished product, the outer wall of the conical traction shaft (19) of the center pin (1) corresponds to the conical surface of the inner hole of the center traction node (8) and then slowly falls down until the conical surface is attached;

s6, the rotation stopping boss (13) which slowly falls down is matched with the positioning groove (20) on the fastening plate (2);

s7, mounting the large bolt (6) from a hole formed in the fastening plate (2) at a position coaxial with the limiting hole (21) to the direction of the central pin (1), and connecting the central pin (1), the central traction node (8) and the fastening plate (2) through the large bolt (6); the second anti-loosening sheet (5) is arranged between the head of the big bolt (6) and the fastening plate (2) for loosening prevention and falling prevention;

s8, the anti-overcharging stopper (3) is connected with the fastening plate (2) through a bolt, and the lower surface of the fastening plate (2) is attached to the upper surface of the anti-overcharging stopper (3).

Technical Field

The invention belongs to the technical field of structural design of railway vehicle bogie products, and particularly relates to a single-bolt connection central traction device for a railway vehicle bogie and an installation method thereof.

Background

The central traction device is one of important devices of the bogie, mainly transmits longitudinal force including traction force, braking force and the like during the running of the railway vehicle, adapts to various movements of the bogie and a vehicle body, relieves impact and vibration in the movement process, and achieves the functions of preventing over-charging of an air spring and hoisting the whole vehicle.

The traditional central traction device adopting a non-single-pull-rod traction mode has the following defects of a plurality of square surfaces in the actual design process:

1) the connecting part of the center pin and the bogie frame adopts interference connection, has poor manufacturability, inconvenient installation and disassembly and is not beneficial to reuse

2) The fastening piece for the central traction device has poor connection reliability, and particularly the bolt with the specification of M30 or above has serious loosening phenomenon

3) When the center pin adopts the conical surface matching, the connection design is difficult due to space limitation.

Disclosure of Invention

The invention provides a single-bolt connection central traction device for a railway vehicle bogie and an installation method thereof, which are used for improving manufacturability, facilitating installation and disassembly, being reusable after disassembly and solving the problem of loosening of a large bolt.

The technical scheme adopted by the invention for solving the technical problems is as follows: a single bolted central draft gear for a railway vehicle truck comprising:

the center pin comprises an installation table, a conical traction shaft and a rotation stopping boss; the mounting table is connected with the rail vehicle body through a plurality of bolts; the conical traction shaft is arranged below the mounting table; the rotation stopping boss is arranged at one end head of the conical traction shaft far away from the mounting table;

the middle part of the traction body is provided with an inner hole, and the traction body is sleeved on the conical traction shaft through the inner hole;

the central traction node is arranged in the middle of the traction body and comprises an outer steel sleeve and an inner steel sleeve, the outer steel sleeve is in transition fit with an inner hole of the traction body, the outer steel sleeve is arranged outside the inner steel sleeve, the inner wall of the inner steel sleeve is a conical surface, and the conical surface is in conical surface fit with the outer wall of the conical traction shaft;

the fastening plate is arranged below the traction body, a positioning groove is formed in the top surface of the fastening plate, the positioning groove is matched with the rotation stopping boss on the conical traction shaft, and the positioning groove is not vertically attached to the rotation stopping boss on the conical traction shaft;

the anti-overcharging stop is attached to the fastening plate and arranged below the fastening plate;

and the large bolt is used for fastening the central pin and the central traction node.

As a further preferred aspect of the present invention, the center pin further includes an oil filling port and an oil groove, wherein:

the oil filling port is formed in the conical traction shaft;

the oil groove is arranged below the oil filling port and is formed in the conical traction shaft;

the oil filling port is communicated with the oil groove.

As a further preferred aspect of the present invention, the traction body is provided with a traction pull rod mounting seat for mounting the traction pull rod or a rubber pile mounting seat for mounting the rubber pile.

As a further preferred aspect of the present invention, the overcharge prevention stopper further includes a limiting hole, and the limiting hole is provided in a middle portion of the overcharge prevention stopper.

In a further preferred embodiment of the present invention, holes through which the large bolts pass are provided in the fastening plate and the tapered draft shaft at positions coaxial with the restriction holes.

As a further preferable mode of the present invention, the fastening plate further comprises a second anti-loosening plate disposed between the large bolt and the fastening plate, the second anti-loosening plate is composed of a central ring and four lug plates, and the four lug plates are spaced apart from each other and distributed on the outer circumferential edge of the central ring;

the ear plate has two states, a first state, in which the ear plate is deployed coplanar with the central ring; in the second state, the cocking of the ear plate is vertical to the surface of the central ring.

As a further preferable mode of the present invention, the fastening plate further comprises a rotation stopping groove, the rotation stopping groove is formed at the bottom of the fastening plate, and the second anti-loosening piece is installed in the rotation stopping groove;

the lug plate in the first state is in contact with the rotation stopping groove;

and the lug plate in the second state is attached to the side surface of the head of the large bolt.

As a further preference of the invention, at least one of the ear plates is in the first state; at least one of the ear plates is in a second state.

As a further preferable mode of the invention, a withdrawal threaded hole is formed in the bottom of the inner steel sleeve of the central traction node, and the aperture of the withdrawal threaded hole is larger than the outer contour of the rotation stopping boss.

The mounting method of the single-bolt connection central traction device for the railway vehicle bogie is also provided, and the specific mounting steps are as follows:

s1, connecting the center pin with the rail vehicle body through a fastener;

s2, matching the central traction node with the traction body in a press-fitting mode;

s3, mounting the traction pull rod or the rubber pile on the traction body through a fastener;

s4, connecting the assembled traction body, the central traction node, the traction pull rod or the rubber pile with a bogie through fasteners;

s5, when the rail vehicle falls into the finished product, the outer wall of the conical traction shaft of the center pin corresponds to the conical surface of the inner hole of the center traction node and then slowly falls down until the conical surface is attached;

s6, matching the slowly falling rotation stopping boss with the positioning groove on the fastening plate;

s7, mounting the big bolt from a hole formed in the fastening plate at a position coaxial with the limiting hole to the direction of the central pin, and connecting the central pin, the central traction node and the fastening plate through the big bolt; the second anti-loosening piece is arranged between the head of the big bolt and the fastening plate for loosening prevention and falling prevention;

s8, the anti-overcharging stop is connected with the fastening plate through a bolt, and the lower surface of the fastening plate is attached to the upper surface of the anti-overcharging stop.

Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the center pin and the center traction node can realize automatic centering of a vehicle and a bogie when the vehicle falls off through a conical surface matching structure, a special tool is not required during installation, only a large bolt is required to be applied with torque, and meanwhile, the parts can be prevented from being damaged during frequent disassembly, repeated use can be realized, and the long service life of the invention is ensured;

2. the process threaded hole at the bottom of the central traction node can realize the disassembly of the central pin and the conical surface of the central traction node through a simple tool, and if the tool cannot be disassembled, the oil can be injected and disassembled through the oil injection port of the central pin; the process threaded hole on the center pin can realize the separation of the center pin and the sleeper beam when being occluded by a fastener;

3. the fastening plate, the central pin and the central traction node are reliably connected by mounting the large bolt, and the large bolt can be never loosened by the second anti-loosening piece and the limiting hole on the anti-overcharging stop;

4. the invention has simple structure and good manufacturability, and can realize the functions of lifting the whole vehicle and preventing the air spring from being overcharged.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of the present invention for installing a drag link;

FIG. 2 is an exploded view of the center pin of the present invention;

FIG. 3 is a schematic illustration of an exploded split of a tractor body and a central traction node according to the present invention;

FIG. 4 is a schematic view of the overall construction of the rubber heap of the present invention;

FIG. 5 is a schematic view of the overall structure of the center pin of the present invention;

FIG. 6 is a schematic view of the location of the oil fill port and oil sump arrangement of the present invention;

FIG. 7 is an internal structure diagram of the overall structure diagram of the present invention;

FIG. 8 is a schematic view of a second anti-loosening element of the present invention;

fig. 9 is a schematic view showing a state where the second locking plate of the present invention is mounted.

In the figure: 1-a center pin; 2-fastening plates; 3-preventing overcharge stop; 4-a first anti-loosening sheet; 5-a second anti-loosening sheet; 6-big bolt; 7-a traction body; 8-a central traction node; 9-elastic retainer ring; 10-a traction pull rod; 11-rubber pile; 12-positioning a boss; 13-rotation stopping bosses; 14-processing a threaded hole; 15-transverse damper seat; 16-lateral stop seat; 17-an oil filling port; 18-an oil groove; 19-a tapered pulling shaft; 20-positioning the groove; 21-a limiting pore; 22-removing the threaded hole; 23-a stop surface; 24-a groove; 25-a rotation stopping groove; 26-long chamfer angle; 27-frame stop face.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

Example 1

This example provides a preferred embodiment, as shown in fig. 1 to 9, a single bolt-on central draft gear for a railway car truck, comprising a center pin 1, a draft body 7, a central draft node 8, a fastening plate 2, an anti-overfill stop 3 and a large bolt 6, which is described in detail below:

the center pin 1 comprises a mounting table, a conical traction shaft 19 and a rotation stopping boss 13, wherein:

as shown in fig. 5, the mounting table is connected with the rail vehicle body by a plurality of bolts; preferably, four threaded holes are formed in two sides of the mounting platform in the width direction respectively, and the mounting platform is connected with a sleeper beam or a swing bolster of a railway vehicle body through eight bolts; a first anti-loosening sheet 4 is arranged between the heads of the eight bolts and the mounting table, and the first anti-loosening sheet 4 is used for loosening prevention; furthermore, a central mounting hole is formed in the middle of the mounting table, a positioning boss 12 is arranged on the periphery of the central mounting hole, and the positioning boss 12 is matched with a groove formed in the sleeper beam or the swing bolster, so that the eight bolts are prevented from being subjected to large shearing force. Preferably, when the mounting platform is matched with the sleeper beam or the swing bolster, an anti-biting agent or an anti-chemical corrosion agent is coated on the matching surface according to the material. Furthermore, a process threaded hole 14 for dismounting is formed in the mounting table.

As shown in fig. 5, the tapered traction shaft 19 is provided below the mount table; a transverse damper seat 15 and a transverse stop seat 16 are arranged on the conical traction shaft 19, the transverse damper is mounted on the transverse damper seat 15 by bolts, and the transverse stop is mounted on the transverse stop seat 16 by fasteners.

As shown in fig. 6, the rotation stopping boss 13 is disposed at an end of the tapered pulling shaft 19 away from the mounting table.

As shown in fig. 6, the center pin 1 further comprises an oil filling port 17 and an oil groove 18, wherein the oil filling port 17 is formed on the outer wall of the conical traction shaft 19; the oil groove 18 is formed along the circumferential surface of the outer wall of the conical traction shaft 19 in a circle and is positioned below the oil filling port 17; the oil filler port 17 communicates with the oil sump 18, and the connection between the oil filler port 17 and the oil sump 18 is indicated by a dotted line in fig. 6 for convenience of description.

As shown in fig. 3 and 4, an inner hole is formed in the middle of the traction body 7, and the traction body 7 is sleeved on the tapered traction shaft 19 through the inner hole. The traction body 7 is provided with two traction pull rod mounting seats for mounting the traction pull rod 10 or a rubber pile mounting seat for mounting the rubber pile 11; a tow tie rod 10 or rubber pile 11 is connected to the bogie frame. The traction body 7 is used for transmitting longitudinal force and adapting to vertical and transverse displacement, the strength of the traction body 7 is reliable, and the safety of vehicle operation can be guaranteed.

As shown in fig. 3, the central traction node 8 is disposed in the middle of the traction body 7, and preferably, the central traction node 8 is made of rubber for adapting to the rotation motion between the bogie and the vehicle body. Furthermore, a groove 24 is formed in the top surface of the central traction node 8, a circlip 9 is installed in the groove 24, and the circlip 9 prevents the central traction node 8 from being pulled out vertically.

As shown in fig. 7, the central traction node 8 includes an outer steel sleeve and an inner steel sleeve, the outer steel sleeve is in transition fit (i.e. in small clearance fit or small interference fit) with the inner bore of the traction body 7, and preferably, the clearance or interference range is less than 0.1 mm. The outer steel sleeve is arranged outside the inner steel sleeve, the inner wall of the inner steel sleeve is processed into a conical surface, and the conical surface is matched with the outer wall of the conical traction shaft 19 to realize automatic centering during installation.

Further, the conical traction shaft 19 is connected with the central traction node 8 through a fastener and 1 large bolt 6 with the model number of M30 or bolts with the specification of more than 6. I.e. the large bolt 6 connects the central pin 1 and the central traction node 8. When in connection, a second anti-loosening piece 5 is arranged between the big bolt 6 and the fastening plate 2 for loosening prevention.

The fastening plate 2 is arranged below the traction body 7, a positioning groove 20 is formed in the top surface of the fastening plate 2, the positioning groove 20 is matched with the rotation stopping boss 13 on the conical traction shaft 19 to prevent the fastening plate 2 and the center pin 1 from rotating relatively, and the mounting surface of the fastening plate 2 is attached to the central traction node 8. The installation requirements between the positioning groove 20 and the rotation stopping boss 13 are as follows: the positioning groove 20 is not vertically attached to the rotation stopping boss 13 on the tapered traction shaft 19.

The fastening plate 2 is provided with a mounting hole for mounting the overcharge-proof stop 3, and the overcharge-proof stop 3 is attached to the fastening plate 2 and is arranged below the fastening plate 2. Preferably, the overcharge stopper 3 is connected to the fastening plate 2 by a fastener.

Further, as shown in fig. 8, the second anti-loosening element 5 is formed by a central ring and four ear plates, and the four ear plates are spaced apart from each other and distributed on the outer circumferential edge of the central ring; the ear plate has two states, a first state, in which the ear plate is deployed coplanar with the central ring; in the second state, the cocking of the ear plate is vertical to the surface of the central ring. Wherein at least one of the four ear plates is in a first state and at least one of the four ear plates is in a second state; preferably, two of said opposed ear plates are in a first state and the other two of said opposed ear plates are in a second state.

Preferably, the second locking plate 5 the lug plate is far away from the one end of central ring sets up long chamfer 26, long chamfer 26 perk when being convenient for install the lug plate with the square face laminating of big bolt 6 head.

Further, the anti-overcharging stopper 3 further comprises a limiting hole 21, the limiting hole 21 is formed in the middle of the anti-overcharging stopper 3, and the limiting hole 21 is used for checking the anti-loose mark of the large bolt 6. Preferably, the diameter of the limiting hole 21 is 2-3 mm larger than the head of the large bolt.

Preferably, holes for passing the large bolts 6 are opened in the fastening plate 2 and the tapered pulling shaft 19 at positions coaxial with the limiting holes 21.

Furthermore, the bottom of the fastening plate 2 is provided with the rotation stopping groove 25, the second anti-loosening piece 5 is installed in the rotation stopping groove 25, and a central ring of the second anti-loosening piece 5 is in contact with the rotation stopping groove 25; preferably, the two ear plates in the first state are in contact with the rotation stopping groove 25, and the two ear plates in the second state are attached to two square surfaces of the six square surfaces of the head of the large bolt 6. Preferably, the depth of the rotation stopping groove 25 is 0.5-1 mm greater than the thickness of the second anti-loosening sheet 5, so as to prevent the second anti-loosening sheet 5 from rotating.

Furthermore, a dismounting threaded hole 22 is formed in the bottom of the inner steel sleeve of the central traction node 8, the aperture of the dismounting threaded hole 22 is larger than the outer contour of the rotation stopping boss 13, and the dismounting threaded hole 22 is used for dismounting the central pin 1 and the central traction node 8; specifically, after the large bolt 6 is removed, the center pin 1 and the center traction node 8 are not completely removed, and then a tool is installed in the dismounting threaded hole 22, and then the tool is screwed to apply torque, so that the center pin 1 is separated from the center traction node 8, and the center pin 1 and the center traction node 8 are completely removed.

The embodiment also comprises an installation method of the single-bolt connection central traction device for the railway vehicle bogie, which comprises the following specific installation steps:

s1, the positioning boss 12 on the center pin 1 is matched with a groove on a sleeper beam or a swing bolster of a railway vehicle body;

s2, connecting the center pin 1 with a railway vehicle body sleeper beam or a swing bolster through a fastener, and preferably, installing the first anti-loosening sheet 4 between the fastener and the installation platform of the center pin 1 to prevent loosening and falling;

s3, mounting the transverse vibration absorber on the transverse vibration absorber seat 15 through a bolt, and mounting the transverse stop on the transverse stop seat 16 through a fastener;

s4, matching the central traction node 8 with the traction body 7 in a press-fitting mode;

s5, after press fitting is completed, installing the elastic check ring 9 in the groove 24 of the central traction node 8;

s6, connecting the traction pull rod 10 or the rubber pile 11 with the traction body 7 through a fastener;

s7, connecting the installed traction body 7, the central traction node 8, the elastic retainer ring 9, the traction pull rod 10 or the rubber pile 11 with a bogie frame through fasteners, specifically, connecting the traction pull rod 10 or the rubber pile 11 with the bogie frame through fasteners;

s8, smearing anti-seizure agent on the taper surfaces of the central pin 1 and the central traction node 8;

s9, when the rail vehicle is finished, the outer wall of the conical traction shaft 19 of the center pin 1 corresponds to the conical surface of the inner hole of the center traction node 8 and then slowly falls down until conical surface fitting is formed;

s10, matching the slowly falling rotation stopping boss 13 with the positioning groove 20 on the fastening plate 2;

s11, attaching the large bolt 6 to the fastening plate 2 from a hole provided at a position coaxial with the limiting hole 21 in the direction of the center pin 1, and connecting the center pin 1, the center traction node 8, and the fastening plate 2 by the large bolt 6; the second anti-loosening piece 5 is arranged between the head of the big bolt 6 and the fastening plate 2 for loosening prevention and falling prevention;

when the second anti-loosening piece 5 is installed, the second anti-loosening piece 5 needs to be placed into the rotation stopping groove 25 on the fastening plate 2, and long chamfers 26 of two ear plates on the second anti-loosening piece 5 are tilted by using a tool to be attached to two square surfaces of six square surfaces of the head of the large bolt 6; after the installation is finished, the outer wall of the conical traction shaft 19 of the center pin 1 is attached to the conical surface of the steel sleeve in the center traction node 8, the fastening plate 2 is attached to the bottom plane of the center traction node 8, and the fastening plate 2 is vertical to the center pin 1 and is not allowed to be attached.

S12, the anti-overcharge stopper 3 is connected to the fastening plate 2 by a bolt, and the lower surface of the fastening plate 2 is attached to the upper surface of the anti-overcharge stopper 3, so as to prevent the second anti-loosening element 5 from escaping from the rotation stopping groove 25;

the limiting hole 21 on the overcharge-preventing stop 3 can limit the expansion size of the second anti-loosening piece 5, so that even if the second anti-loosening piece 5 fails to expand, the lug plate of the second anti-loosening piece 5 cannot expand too much due to the limitation of the limiting hole 21, and the second anti-loosening piece 5 can still achieve the purposes of preventing loosening and preventing falling, so that the large bolt 6 still cannot rotate, and the connection reliability of the large bolt 6 can be effectively realized;

when the air spring occurs, the anti-overcharging stop 3 can be in contact with a framework stop surface 27 on the bogie frame, so that the anti-overcharging function of the air spring and the lifting function of the whole vehicle are realized.

During disassembly and maintenance, turning the process threaded holes 14 in the center pin 1 by using bolts or tools to separate the center pin 1 from a sleeper beam or a swing bolster of a railway vehicle body; after the fastening plate 2 is detached and the overcharge-preventing stopper 3 is turned into the dismounting threaded hole 22 on the central traction node 8 by using a tool, the central pin 1 is separated from the central traction node 8, and if the tool cannot be separated, oil can be injected and dismounted by using a hydraulic pump through the oil injection port 17 and the oil groove 18 on the central pin 1.

Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the center pin 1 and the center traction node 8 are matched through the conical surfaces, so that automatic centering of a vehicle and a bogie can be realized when the vehicle falls off, a special tool is not required during installation, only a torque is applied to the large bolt 6, meanwhile, damage to parts during frequent disassembly can be avoided, repeated use can be realized, and the long service life of the invention is ensured;

2. in the invention, the dismounting threaded hole 22 at the bottom of the central traction node 8 can realize the conical surface dismounting of the central pin 1 and the central traction node 8 through a simple tool, and when the tool cannot be dismounted, the dismounting can be carried out by injecting oil to the oil injection port 17; the process threaded hole 14 on the mounting platform of the center pin 1 can realize the separation of the center pin 1 when being engaged with a sleeper beam or a swing bolster of a railway vehicle body through a fastener;

3. the fastening plate 2, the central pin 1 and the central traction node 8 are reliably connected by mounting the large bolt 6, and the large bolt 6 can be never loosened by the second anti-loosening piece 5 and the limiting hole 21 on the anti-overcharging stop 3;

4. the invention has simple structure and good manufacturability, and can realize the functions of lifting the whole vehicle and preventing the air spring from being overcharged.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The meaning of "and/or" as used herein is intended to include both the individual components or both.

The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.