Central traction device and bogie

Abstract

The invention discloses a central traction device and a bogie, and relates to the field of rail train structures, the central traction device comprises a traction seat and a traction pin, the traction pin comprises a transverse pin shaft and a vertical pin shaft which are fixedly connected with each other, the traction seat is connected with the transverse pin shaft, a flexible joint is arranged between the transverse pin shaft and the traction seat, and the vertical pin shaft is connected with the traction seat. The flexible joint comprises an elastic body, the traction base transmits pressure to the transverse pin shaft through the elastic body, and the traction device has the technical effect that the adaptive capacity of frequent deflection and torsion of the traction device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail train mechanism, and more particularly to a central traction device and a bogie. BACKGROUND

[0002] At present, the traction device of the rail vehicle bogie is generally composed of a traction seat, a traction rod and other components, which is used for transmitting traction force and braking force, reducing the longitudinal impact between the vehicle body and the bogie, ensuring the relative movement between the vehicle body and the bogie, and facilitating the vehicle to pass through the curve.

[0003] The traction device of the conventional urban rail or motor train vehicle generally has a traction rod assembly, which requires a large installation space to be reserved in the bogie, and the frame must have a traction rod mounting seat, so the structure is relatively complex. Meanwhile, a center pin sleeve or traction rubber stack may be needed in the traction device to adapt to the deflection and torsion movement between the bogie and the vehicle body when the vehicle passes through the curve, but the rubber part also provides additional deflection and torsion stiffness, which prevents the bogie from deflecting and torsioning relative to the vehicle body to a certain extent. In addition, if the vehicle operating line has many curves and small radii, the rubber part may not meet the application requirements of long-term and frequent large-angle deflection and torsion, and may crack or delaminate, thereby shortening the service life of the traction device rubber part and increasing the operation and maintenance cost.

[0004] In summary, how to improve the adaptability of the traction device to frequent deflection and torsion, and to realize compact layout and multifunctional integration design as much as possible is a problem to be solved by the technical personnel in the field. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a central traction device and a bogie, which effectively improve the adaptability of the traction device to frequent deflection and torsion.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A central traction device, comprising a traction seat and a traction pin, the traction pin comprising a transverse pin shaft and a vertical pin shaft fixedly connected with each other, the traction seat being connected with the transverse pin shaft, and a flexible joint being arranged between the transverse pin shaft and the traction seat, the flexible joint comprising an elastic body, and the traction seat transmitting pressure to the transverse pin shaft through the elastic body.

[0008] Preferably, the flexible joint further comprises an inner joint ring body and an outer joint ring body, the elastic body is annular and coaxially sleeved outside the inner joint ring body, the outer joint ring body is coaxially sleeved outside the elastic body, the inner joint ring body is coaxially sleeved outside the transverse pin shaft, the traction seat is provided with a matching hole, the flexible joint is located in the matching hole, and the hole wall of the matching hole is in contact with the outer side wall of the outer joint ring body.

[0009] Preferably, a mating protrusion is coaxially fixedly connected to the outer wall of the outer ring body of the segment, and a mating ring groove is coaxially formed on the wall of the mating hole, and the mating protrusion is embedded in the mating ring groove.

[0010] Preferably, a traction pressure block is detachably connected to the traction seat, and the mating hole is formed between the traction pressure block and the traction seat.

[0011] Preferably, the cross-section of the elastomer is V-shaped, the outer wall of the inner joint ring is formed with a limiting annular groove, and the inner wall of the outer joint ring is formed with a limiting protrusion, the limiting protrusion being engaged by the elastomer and the limiting annular groove.

[0012] Preferably, a joint end plate is fixedly disposed on the inner ring of the joint, the plate surface of the joint end plate and the end face of the transverse pin are in contact and abut against each other, the flexible joint also includes a joint end cap, the joint end cap is provided with fasteners, the joint end cap is connected to the transverse pin through the fasteners, and the radial dimension of the joint end cap is larger than the diameter of the mating hole.

[0013] A bogie includes a support base and the aforementioned central traction device, wherein a spherical bearing is provided on the support base, and the inner ring of the spherical bearing is coaxially sleeved outside the vertical pin shaft.

[0014] Preferably, the supporting base frame is provided with a dustproof sleeve, which is sleeved outside the vertical pin shaft. The dustproof sleeve is located above the spherical bearing, and the mating position of the spherical bearing and the vertical pin shaft is located inside the dustproof sleeve.

[0015] Preferably, the dustproof sleeve is axially telescopic and deformable, and a support spring is also sleeved on the outside of the vertical pin. The lower end of the support spring is fixed relative to the vertical pin, and the upper end of the support spring transmits thrust to the upper end of the dustproof sleeve. A force-bearing cone is coaxially arranged on the vertical pin. The radial dimension of the force-bearing cone gradually increases from bottom to top, and the upper end of the dustproof sleeve abuts against the side wall of the force-bearing cone.

[0016] Preferably, two transverse stop seats are fixedly connected to the supporting base frame. The two transverse stop seats are located on opposite sides of the traction seat. A stop block is provided on each opposite side of the traction seat. The arrangement direction of the two stop blocks is perpendicular to the length direction of the transverse pin shaft. Each stop block faces a transverse stop seat. There is a gap between the stop block and the transverse stop seat.

[0017] The central traction device and bogie provided in this application have a traction seat that supports the car body and transmits gravity to the bogie through a traction pin. The lateral pin of the traction pin is used to connect with the traction seat, and the vertical pin is used to connect with the bogie. Since the connection structure between the traction seat and the lateral pin is a flexible joint, the elastic body in the flexible joint can undergo elastic deformation. That is, the stability of the connection state between the traction seat and the traction pin is not high. During large-angle deflection or torsion, the relative posture movement space between the traction seat and the traction pin is large, so the traction device has a high adaptability to frequent deflection and torsion. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the overall structure of the bogie in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram illustrating the overall structure of the traction shaft in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram illustrating the structure of the traction seat in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram illustrating the overall structure of the central traction device after the bearing housing and dustproof sleeve are installed, as shown in the embodiments of this application.

[0023] Figure 5 This is a side view of the structure of the supporting base and the traction seat in the embodiments of this application.

[0024] Figures 1-5 In the accompanying drawings, the reference numerals include:

[0025] 1. Car body underframe; 2. Traction seat; 21. Mating hole; 22. Mating ring groove; 23. Traction pressure block; 24. Stop block; 3. Traction pin; 31. Horizontal pin shaft; 32. Vertical pin shaft; 33. Force-bearing cone; 34. Fixing pin sleeve; 35. Elastic retaining ring; 4. Flexible joint; 41. Inner ring of the joint; 42. Outer ring of the joint; 43. Elastomer; 44. Mating convex ring; 45. Joint end plate; 46. Joint end cover; 5. Bearing underframe; 51. Operating hole; 511. Dust cover; 52. Lateral stop seat; 53. Bearing seat; 54. Joint bearing; 6. Dustproof sleeve; 61. Support spring. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance. Terms such as "connection" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. Embodiments of this application disclose a central traction device and a bogie.

[0028] The core of this application is to provide a central traction device.

[0029] Please refer to Figures 1-3 .

[0030] The central traction device provided in this application includes a traction seat 2 and a traction pin 3. The traction pin 3 is T-shaped and includes a horizontal pin 31 and a vertical pin 32 integrally formed with each other. One end of the vertical pin 32 is located in the middle of the horizontal pin 31. The traction seat 2 is a rectangular shell shape and is connected to the horizontal pin 31. The vehicle body frame 1 is supported on the top of the traction seat 2. When the traction seat 2 and the traction pin 3 are connected, the axis of the horizontal pin 31 is horizontal. The traction seat 2 is fastened to the horizontal pin 1, and the length direction of the horizontal pin 1 is consistent with the length direction of the traction seat 2. The vertical pin 32 is located below the horizontal pin 31, thus forming a compact structural layout. The traction device has the characteristics of small space occupation and light weight.

[0031] A flexible joint 4 is provided between the transverse pin 31 and the traction seat 2. There are two flexible joints 4, located at the two ends of the transverse pin 31 respectively. The flexible joint 4 includes an elastic body 43. The traction seat 2 transmits pressure to the transverse pin 31 through the elastic body 43. The elastic body 43 can undergo elastic deformation, that is, the connection state between the traction seat 2 and the traction pin 3 is not very fixed. During large-angle deflection or torsion, the relative posture movement space between the traction seat 2 and the traction pin 3 is large, so the traction device has a high adaptability to frequent deflection and torsion.

[0032] The central traction device and bogie provided by the present application will be introduced in more detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] In a specific embodiment, refer to Figure 1 .

[0034] Specifically, the flexible joint 4 is cylindrical, and it further includes a joint inner ring body 41 and a joint outer ring body 42. The elastic body 43 is annular and coaxially sleeved outside the joint inner ring body 41, and the joint outer ring body 42 is coaxially sleeved outside the elastic body 43. In this embodiment, the elastic body 43 is made of rubber material, and its outer side wall and inner side wall are respectively adhered and fixed to the inner wall of the joint outer ring body 42 and the outer wall of the joint inner ring body 41. The joint inner ring body 41 is coaxially sleeved outside the cross pin shaft 31, and the side wall of the cross pin shaft 31 is in contact with the inner wall of the joint inner ring body 41.

[0035] The traction seat 2 is provided with a circular mating hole 21. The flexible joint 4 is located in the mating hole 21 and they are coaxial. The hole wall of the mating hole 21 contacts the outer side wall of the joint outer ring body 42. The mating of the flexible joint 4 and the mating hole 21 is the connection form between the traction seat 2 and the traction seat 2. After they are connected, the gravity of the traction seat 2 and the vehicle body is transmitted to the flexible joint 4 through the hole wall of the mating hole 21 and continues to be transmitted to the traction pin 3 through the flexible joint 4.

[0036] Based on the above embodiment, refer to Figure 1 .

[0037] Specifically, a mating convex ring 44 is integrally formed coaxially on the outer side wall of the joint outer ring body 42. In this embodiment, the joint outer ring body 42 with the mating convex ring 44 has a "convex" cross-section.

[0038] A mating ring groove 22 is coaxially formed on the hole wall of the mating hole 21. The mating convex ring 44 is embedded in the mating ring groove 22. The groove wall of the mating ring groove 22 forms an axial abutting limit on the mating convex ring 44, so that the joint outer ring body 42 is not easily displaced relative to the traction seat 2 along its own axis, thereby improving the position stability of the joint outer ring body 42 relative to the traction seat 2.

[0039] Based on the above embodiment, refer to Figure 1 , Figure 3 and Figure 4 .

[0040] Specifically, a traction pressing block 23 is detachably connected to the lower side of the traction seat 2. Semi-circular notch grooves are formed on the lower side of the traction seat 2 and the traction pressing block 23. When the traction pressing block 23 is connected and installed on the traction seat 2, the notch groove openings on the traction seat 2 and the traction pressing block 23 are buckled with each other to form the mating hole 21.

[0041] The diameter of the mating hole 21 is the same as the outer diameter of the joint outer ring 42, both of which are smaller than the outer diameter of the mating protrusion 44. Therefore, the mating hole 21 is composed of the traction seat 2 and the traction pressure block 23. Before the mating hole 21 is formed, the flexible joint 4 is placed into the semi-circular notch of the traction seat 2, and then the traction pressure block 23 is installed, thereby realizing the installation operation of the flexible joint 4 and the traction seat 2.

[0042] In this embodiment, the traction block 23 and the traction seat 2 are connected by bolts, with the bolts passing through the traction block 23 from bottom to top and screwed into the traction seat 2.

[0043] Based on the above embodiments, refer to Figure 1 .

[0044] Specifically, the cross-section of the elastomer 43 is V-shaped, with a raised inner edge and a recessed outer edge. A limiting annular groove is formed on the outer wall of the intra-articular annular body 41, and a limiting protrusion is formed on the inner wall of the outer-articular annular body 42. The limiting protrusion is embedded in the recess on the outer edge of the elastomer 43, and the protruding structure on the inner edge of the elastomer 43 is embedded in the limiting annular groove. Through the cooperation of the elastomer 43 and the limiting annular groove, axial mutual obstruction is formed between the outer-articular annular body 42, the elastomer 43, and the intra-articular body, preventing irreversible axial deformation and damage to the flexible joint 4 itself.

[0045] Based on the above embodiments, refer to Figure 1 and Figure 4 .

[0046] Specifically, a joint end plate 45 is integrally formed on the inner ring body 41, and the surface of the joint end plate 45 abuts against the end face of the transverse pin 31. The flexible joint 4 also includes a joint end cap 46, which is provided with fasteners. The joint end cap 46 is connected to the transverse pin 31 through the fasteners. In this embodiment, the fasteners are bolts. The bolts pass through the joint end cap 46 and the joint end plate 45 and are threadedly connected to the transverse pin 31, thereby connecting and fixing the flexible joint 4 and the transverse pin 31. The number of bolts on a single joint end cap 46 is three.

[0047] The radial dimension of the joint end cap 46 is larger than the diameter of the mating hole 21, and the joint end cap 46 has the effect of isolating and protecting the flexible joint 4. In the natural state, the joint end cap 46 is in contact with the joint end plate 45 and the elastomer 43, but the joint end cap 46 is not in contact with the outer ring body 42 of the joint, so it does not affect the normal deformation of the flexible joint 4.

[0048] like Figure 1 and Figure 4As shown, the bogie provided in this application includes a support base 5 and a central traction device as described in any of the above embodiments. A spherical plain bearing 54 is provided on the support base 5. The outer ring axis of the spherical plain bearing 54 is vertical, and the inner ring of the spherical plain bearing 54 is coaxially sleeved outside the vertical pin 32. The traction pin 3 is rotatably connected to the support base 5 through the spherical plain bearing 54. Since the inner ring axis of the spherical plain bearing 54 has multiple degrees of freedom relative to the outer ring, the traction pin 3 also has a high degree of freedom of movement relative to the support base 5. This results in greater mobility for the traction pin 3 and the traction seat 2 relative to the support base 5, thereby further improving the bogie's adaptability to frequent deflection and torsion.

[0049] In the specific implementation process, a fixed pin sleeve 34 is coaxially fixedly connected to the outside of the vertical pin shaft 32 through an interference fit. The upper outer edge of the fixed pin sleeve 34 is formed with a shaft shoulder, and the lower end is fitted with an elastic retaining ring 35. The shaft shoulder and the elastic retaining ring 35 are located on the upper and lower sides of the inner ring of the spherical bearing 54, respectively, thus forming a mutually fixed connection relationship.

[0050] Since the inner and outer rings of the spherical plain bearing 54 are ball joints, when the vehicle is lifted as a whole, the weight of the supporting underframe 5 can be directly supported by the components between the traction pin 3 and the spherical plain bearing 54. The entire bogie can be lifted by lifting the car body underframe 1, thus eliminating the need to install a separate lifting device for the bogie.

[0051] Based on the above embodiments, refer to Figure 1 and Figure 4 .

[0052] Specifically, the support frame 5 is equipped with a dustproof sleeve 6, which is located above the spherical bearing 54. The dustproof sleeve 6 is sleeved outside the vertical pin 32. The mating positions of the inner and outer rings of the spherical bearing 54 and the mating positions of the spherical bearing 54 and the vertical pin 32 are located inside the dustproof sleeve 6. That is, the dustproof sleeve 6 forms a dustproof isolation protection for the mating connection structure of the traction pin 3 and the spherical bearing 54.

[0053] In actual implementation, a bearing seat 53 for cooperating with the spherical bearing 54 is installed on the supporting base frame 5, and the bottom of the dustproof sleeve 6 is fixed to the upper end face of the bearing seat 53 by bolts.

[0054] Based on the above embodiments, refer to Figure 1 and Figure 4 .

[0055] Specifically, the main body of the dustproof sleeve 6 is a corrugated rubber tube, which can expand and contract axially and has a certain radial elastic deformation capability. A support spring 61 is also sleeved outside the vertical pin 32, and the support spring 61 is located inside the dustproof sleeve 6; the lower end of the support spring 61 abuts against the top of the fixing pin sleeve 34, thus always being fixed relative to the vertical pin 32. The top of the dustproof sleeve 6 is provided with a rigid constriction structure, and the upper end of the support spring 61 abuts against this constriction structure, thereby transmitting an upward thrust to the upper end of the dustproof sleeve 6.

[0056] A force-bearing cone 33 is integrally formed on the vertical pin 32. The radial dimension of the force-bearing cone 33 gradually increases from bottom to top. Under the continuous upward pushing action of the support spring 61, the upper end of the dustproof sleeve 6 abuts against the side wall of the force-bearing cone 33, thereby achieving a seal on the upper end of the dustproof sleeve 6.

[0057] Based on the above embodiments, refer to Figure 1 and Figure 4 .

[0058] Specifically, the bearing housing 53 is installed from bottom to top inside the bearing base 5. The bearing housing 53 has a flange structure around it, and multiple bolts are vertically inserted through the flange structure. The bolts are threadedly connected to the bearing base 5.

[0059] An operating hole 51 is provided at the bottom of the support base 5, which provides space for the installation of the bearing housing 53 and the elastic retaining ring 35. A dust cover 511 is detachably installed at the bottom of the support base 5 by bolts. The dust cover 511 is used to seal the operating hole 51 to prevent impurities such as mud and water from entering the installation hole and negatively affecting the structure of the spherical plain bearing 54.

[0060] Based on the above embodiments, refer to Figure 4 and Figure 5 .

[0061] Specifically, a stop block 24 is fixedly installed on each of the opposite sides of the traction seat 2. The arrangement direction of the two stop blocks 24 is perpendicular to the length direction of the transverse pin shaft 31, and each stop block 24 is located at the center of the traction seat 2 on its respective side.

[0062] Two lateral stop seats 52 are fixedly connected to the support base 5, and the two lateral stop seats 52 are located on opposite sides of the traction seat 2. Each stop block 24 faces one of the lateral stop seats 52, and there is a gap between the stop block 24 and the lateral stop seat 52. When the traction device and the support base 5 experience excessive lateral displacement, the lateral stop seat 52 abuts against the stop block 24, thereby limiting the displacement stroke of the traction seat 2.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The above provides a detailed description of a central traction device and bogie provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A central traction device, characterized in that, It includes a traction seat (2) and a traction pin (3). The traction pin (3) includes a horizontal pin (31) and a vertical pin (32) that are fixedly connected to each other. The traction seat (2) and the horizontal pin (31) are connected. A flexible joint (4) is provided between the horizontal pin (31) and the traction seat (2). The flexible joint (4) includes an elastic body (43). The traction seat (2) transmits pressure to the horizontal pin (31) through the elastic body (43).

2. The central traction device according to claim 1, characterized in that, The flexible joint (4) further includes an inner joint ring (41) and an outer joint ring (42). The elastic body (43) is annular and coaxially sleeved outside the inner joint ring (41). The outer joint ring (42) is coaxially sleeved outside the elastic body (43). The inner joint ring (41) is coaxially sleeved outside the transverse pin (31). The traction seat (2) is provided with a mating hole (21). The flexible joint (4) is located inside the mating hole (21). The hole wall of the mating hole (21) is in contact with the outer wall of the outer joint ring (42).

3. The central traction device according to claim 2, characterized in that, The outer wall of the joint outer ring (42) is coaxially fixedly connected with a mating protrusion (44), and a mating ring groove (22) is coaxially opened on the hole wall of the mating hole (21), and the mating protrusion (44) is embedded in the mating ring groove (22).

4. The central traction device according to claim 3, characterized in that, A traction block (23) is detachably connected to the traction seat (2), and the mating hole (21) is formed between the traction block (23) and the traction seat (2).

5. The central traction device according to any one of claims 2-4, characterized in that, The cross-section of the elastomer (43) is V-shaped. The outer wall of the inner joint ring (41) forms a limiting ring groove, and the inner wall of the outer joint ring (42) forms a limiting protrusion. The limiting protrusion is engaged by the elastomer (43) and the limiting ring groove.

6. The central traction device according to any one of claims 2-4, characterized in that, A joint end plate (45) is fixedly provided on the inner ring body (41) of the joint. The plate surface of the joint end plate (45) and the end face of the transverse pin (31) are in contact. The flexible joint (4) also includes a joint end cap (46). The joint end cap (46) is provided with fasteners. The joint end cap (46) is connected to the transverse pin (31) through the fasteners. The radial dimension of the joint end cap (46) is larger than the diameter of the mating hole (21).

7. A bogie, characterized in that, The device includes a support frame (5) and a central traction device as described in any one of claims 1-6. The support frame (5) is provided with a spherical bearing (54), and the inner ring of the spherical bearing (54) is coaxially sleeved outside the vertical pin (32).

8. The bogie according to claim 7, characterized in that, The supporting base frame (5) is provided with a dustproof sleeve (6), which is sleeved outside the vertical pin (32). The dustproof sleeve (6) is located above the spherical bearing (54), and the mating position of the spherical bearing (54) and the vertical pin (32) is located inside the dustproof sleeve (6).

9. The bogie according to claim 8, characterized in that, The dustproof sleeve (6) can be axially extended and deformed. A support spring (61) is also sleeved on the outside of the vertical pin (32). The lower end of the support spring (61) is fixed relative to the vertical pin (32). The upper end of the support spring (61) transmits thrust to the upper end of the dustproof sleeve (6). A force-bearing cone (33) is coaxially arranged on the vertical pin (32). The radial dimension of the force-bearing cone (33) gradually increases from bottom to top. The upper end of the dustproof sleeve (6) and the side wall of the force-bearing cone (33) abut against each other.

10. The bogie according to any one of claims 7-9, characterized in that, Two transverse stop seats (52) are fixedly connected to the support base (5). The two transverse stop seats (52) are located on opposite sides of the traction seat (2). A stop block (24) is provided on opposite sides of the traction seat (2). The arrangement direction of the two stop blocks (24) is perpendicular to the length direction of the transverse pin (31). Each stop block (24) faces a transverse stop seat (52). There is a gap between the stop block (24) and the transverse stop seat (52).

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