Central traction device, bogie and railway vehicle

Abstract

The present application relates to the field of rail vehicle technology, and provides a central traction device, a bogie and a rail vehicle, the central traction device comprising a traction beam, a pin sleeve, a center pin and a connecting rod. The traction beam is configured with a mounting channel in the height direction, and the outer surface of the traction beam is configured with a connecting part. The pin sleeve is mounted in the mounting channel, and the pin sleeve is configured with a pin hole and two free gaps in the height direction. In the width direction of the rail vehicle, the two free gaps are respectively located on the two sides of the pin sleeve. The center pin is mounted in the pin hole. One end of the connecting rod is connected to the connecting part, and the other end of the connecting rod is adapted to be connected to the frame. The redundancy of the structural parts of the central traction device can be avoided, and the lightweight is realized while the horizontal, vertical and longitudinal functions remain unchanged.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and more particularly to a central traction device, a bogie, and a rail vehicle. Background Technology

[0002] In rail vehicles, traditional central traction devices mostly adopt single-rod or double-rod central traction devices. Their structure is usually designed with lateral stop seats to install lateral stops. This results in a large number of structural components and a heavy weight in the central traction device, which is not conducive to the lightweight design of the central traction device, bogie, and rail vehicle. Summary of the Invention

[0003] This invention provides a central traction device to solve the technical problem that the central traction device in the prior art requires a separate design of the lateral stop, resulting in more structural components and greater weight, thereby achieving a lightweight design of the central traction device.

[0004] The present invention also provides a bogie.

[0005] The present invention also provides a rail vehicle.

[0006] This invention provides a central traction device, comprising:

[0007] The traction beam has an installation channel along its height direction, and the outer surface of the traction beam has a connecting part.

[0008] A pin sleeve is installed in the mounting channel. The pin sleeve has a pin hole and two free gaps along the height direction. Along the width direction of the rail vehicle, the two free gaps are located on both sides of the pin hole.

[0009] A center pin is installed in the pin hole;

[0010] The connecting rod has one end connected to the connecting part and the other end adapted to be connected to the frame.

[0011] According to a central traction device provided by the present invention, the four connecting parts are arranged at circumferential intervals along the outer surface of the traction beam, and each pair of adjacent connecting parts are arranged at an angle.

[0012] According to a central traction device provided by the present invention, the cross-section of the free gap is arc-shaped, and the two free gaps are located on the same circumference, wherein each of the free gaps corresponds to two gap ends, and the positions of the four connecting parts correspond to the four gap ends respectively.

[0013] According to a central traction device provided by the present invention, the mounting channel is configured to taper in the direction from top to bottom, the central pin is adapted to the mounting channel, and the central pin is adapted to be inserted into the mounting channel from above the traction beam.

[0014] According to a central traction device provided by the present invention, a pressure cover is provided below the traction beam, and the pressure cover, the pin sleeve and the center pin are adapted to be fixed to each other by fasteners.

[0015] According to a central traction device provided by the present invention, one end of the connecting rod is adapted to be installed on the connecting part via a rubber node, and the other end of the connecting rod is adapted to be connected to a frame mounting seat via a rubber node, the frame mounting seat being adapted to be connected to a frame.

[0016] According to a central traction device provided by the present invention, the connecting rod extends in a direction away from the traction beam and is configured with a downwardly inclined bent section.

[0017] According to a central traction device provided by the present invention, the two ends of the connecting rod are respectively provided with a first connecting ring and a second connecting ring. The first connecting ring is horizontally arranged and is adapted to be connected to the connecting part by a rubber node and a fastener. The second connecting ring is vertically arranged and is adapted to be connected to the frame mounting base by a rubber node and a fastener.

[0018] The present invention also provides a bogie, including a frame and a central traction device as described above, wherein the central traction device is mounted on the frame.

[0019] The present invention also provides a rail vehicle, including a car body, wherein the car body is provided with a bogie as described above.

[0020] The central traction device provided in this embodiment of the invention connects the pin sleeve through the installation channel of the traction beam and installs the center pin in the pin hole of the pin sleeve, realizing the mutual assembly between the traction beam, the pin sleeve and the center pin. The connecting part on the outer surface of the traction beam is connected to the frame through the connecting rod, so as to transmit the longitudinal load to the frame through the connecting rod. At the same time, the traction beam can also swing with the frame through the connecting rod to release the vertical load. The free clearance inside the pin sleeve can make the pin sleeve softer in the lateral direction and harder in the longitudinal direction. While ensuring the transmission of longitudinal load, it reduces the constraint on lateral movement within a certain displacement and avoids adding large lateral stiffness. At the same time, when the lateral displacement exceeds the limit, the two inner sidewalls of the free clearance contact each other to realize the lateral stop function. This avoids the redundancy of the central traction device structural components and achieves lightweighting while retaining the lateral, vertical and longitudinal functions unchanged.

[0021] The bogie provided in this embodiment of the invention, by installing the aforementioned central traction device on the frame, connecting the pin sleeve through the installation channel of the traction beam, and installing the center pin in the pin hole of the pin sleeve, realizes the mutual assembly between the traction beam, the pin sleeve, and the center pin. The connecting part on the outer surface of the traction beam is connected to the frame through the connecting rod, so as to transmit the longitudinal load to the frame through the connecting rod. At the same time, the traction beam can also swing with the frame through the connecting rod to release the vertical load. The free clearance inside the pin sleeve allows the pin sleeve to be softer in the lateral direction and harder in the longitudinal direction. While ensuring the transmission of longitudinal load, it reduces the constraint on lateral movement within a certain displacement, avoiding the addition of large lateral stiffness. At the same time, when the lateral displacement exceeds the limit, the two inner sidewalls of the free clearance contact each other to realize the lateral stop function. Thus, the redundancy of the central traction device structural components can be avoided, and lightweighting can be achieved while retaining the lateral, vertical, and longitudinal functions unchanged.

[0022] The rail vehicle provided in this embodiment of the invention, by installing the aforementioned bogie on the car body, connecting the pin sleeve through the installation channel of the traction beam, and installing the center pin in the pin hole of the pin sleeve, realizes the mutual assembly between the traction beam, the pin sleeve, and the center pin. The connecting part on the outer surface of the traction beam is connected to the frame through the connecting rod, so as to transmit the longitudinal load to the frame through the connecting rod. At the same time, the traction beam can also swing with the frame through the connecting rod to release the vertical load. The free clearance inside the pin sleeve allows the pin sleeve to be softer in the lateral direction and harder in the longitudinal direction. While ensuring the transmission of longitudinal load, it reduces the constraint on lateral movement within a certain displacement, avoiding the addition of large lateral stiffness. At the same time, when the lateral displacement exceeds the limit, the two inner sidewalls of the free clearance contact each other to realize the lateral stop function. This avoids the redundancy of the central traction device structural components and achieves lightweighting while retaining the lateral, vertical, and longitudinal functions unchanged. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is one of the cross-sectional views of the central traction device provided by the present invention;

[0025] Figure 2 This is a second cross-sectional view of the central traction device provided by the present invention;

[0026] Figure 3 This is the third sectional view of the central traction device provided by the present invention;

[0027] Figure 4This is a three-dimensional structural diagram of the central traction device provided by the present invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the pin sleeve provided by the present invention.

[0029] Figure label:

[0030] 100. Traction beam; 110. Installation channel; 120. Connecting part; 200. Pin sleeve; 210. Pin hole; 220. Free clearance; 300. Center pin; 400. Connecting rod; 410. First connecting ring; 420. Second connecting ring; 500. Pressure cap; 600. Frame mounting base. Detailed Implementation

[0031] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0034] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] The following is combined Figures 1-5 This invention describes an embodiment of a central traction device, including a traction beam 100, a pin sleeve 200, a center pin 300, and a connecting rod 400. The traction beam 100 has an installation channel 110 along its height direction, and a connecting portion 120 is formed on its outer surface. The pin sleeve 200 is installed in the installation channel 110, and has a pin hole 210 and two free gaps 220 along its height direction. Along the width direction of the rail vehicle, the two free gaps 220 are located on opposite sides of the pin sleeve 200. The center pin 300 is installed in the pin hole 210. One end of the connecting rod 400 is connected to the connecting portion 120, and the other end of the connecting rod 400 is adapted to be connected to a frame.

[0037] In this embodiment, the pin sleeve 200 is connected through the mounting channel 110 of the traction beam 100, and the center pin 300 is installed in the pin hole 210 of the pin sleeve 200, realizing the mutual assembly between the traction beam 100, the pin sleeve 200 and the center pin 300. The connecting part 120 on the outer surface of the traction beam 100 is connected to the frame through the connecting rod 400, so as to transmit the longitudinal load to the frame through the connecting rod 400. At the same time, the traction beam 100 can also swing with the frame through the connecting rod 400 to release the vertical load. The free gap 220 inside the pin sleeve 200 can make the pin sleeve 200 softer in the lateral direction and harder in the longitudinal direction. While ensuring the transmission of longitudinal load, it reduces the constraint on lateral movement within a certain displacement amount and avoids adding large lateral stiffness. At the same time, when the lateral displacement exceeds the limit, the two inner sidewalls of the free gap 220 contact each other to realize the lateral stop function. This avoids the redundancy of the central traction device structural components and achieves lightweighting while retaining the lateral, vertical and longitudinal functions unchanged.

[0038] like Figure 4 As shown, the traction beam 100 is generally cylindrical, and an installation channel 110 is constructed along the height direction at the center of the traction beam 100, so as to install the pin sleeve 200 and the center pin 300 inside the traction beam 100.

[0039] The pin sleeve 200 can be made of metal material and rubber vulcanizing material. The pin sleeve 200 includes an inner ring and an outer ring, with rubber vulcanizing material filling the space between the inner ring and the outer ring. A free gap 220 is formed in the rubber vulcanizing material, and a pin hole 210 is formed in the middle of the inner ring, thereby forming a pin sleeve 200 structure with a pin hole 210 and a free gap 220.

[0040] The pin sleeve 200, supported by metal and rubber vulcanized materials, has low torsional stiffness, which can release the rotational freedom between the center pin 300 and the frame.

[0041] Along the width direction of the rail vehicle, two free clearances 220 are located on both sides of the pin hole 210. This arrangement allows the pin sleeve 200 to be relatively soft laterally and relatively stiff longitudinally. While ensuring the transmission of longitudinal loads, it reduces the constraint on lateral movement within a certain displacement range, avoiding the addition of excessive lateral stiffness. Simultaneously, when the lateral displacement exceeds the limit, the two inner sidewalls of the free clearance 220 contact each other, achieving a lateral stop function. Therefore, during train turning, the pin sleeve 200 can absorb lateral torque, performing the function of a traditional lateral stop.

[0042] According to the central traction device provided by the present invention, four connecting parts 120 are provided, and the four connecting parts 120 are distributed circumferentially along the outer surface of the traction beam 100, with each pair of adjacent connecting parts 120 arranged at an angle.

[0043] Four connecting parts 120 can be provided to connect four connecting rods 400 to the outer surface of the traction beam 100. Since each pair of adjacent connecting parts 120 is set at an angle, the four connecting rods 400 are distributed at a certain angle, which can transmit the longitudinal force to the four directions of the frame through the four connecting rods 400, so as to achieve uniform and distributed transmission of longitudinal load.

[0044] The four connecting parts 120 can be integrally cast onto the outer surface of the traction beam 100.

[0045] like Figure 1 and Figure 5 As shown, the cross-section of the free gap 220 is arc-shaped, and the two free gaps 220 are located on the same circumference. Each free gap 220 corresponds to two gap ends, and the positions of the four connecting parts 120 correspond to the four gap ends.

[0046] The arc-shaped free gaps 220 can adapt to the shape of the traction beam 100. The two free gaps 220 are not only located on the same circumference but also arranged symmetrically, with the axis of symmetry of the two free gaps 220 being one of the diameter segments of the traction beam 100. The arc-shaped free gaps 220 can form two gap ends, corresponding the positions of the four connecting parts 120 to the four gap ends respectively, further ensuring that the longitudinal load is transmitted evenly and distributedly. At the same time, it allows the lateral load to be limited by the pin sleeve 200.

[0047] In this embodiment, the mounting channel 110 is tapered from top to bottom, and the center pin 300 is adapted to the mounting channel 110. The center pin 300 is suitable for being inserted into the mounting channel 110 from above the traction beam 100. The tapered mounting channel 110 facilitates the installation of the center pin 300. Corresponding to the tapered mounting channel 110 from top to bottom, the center pin 300 is also set as a frustum-shaped structure that tapers from top to bottom.

[0048] like Figure 2 and Figure 3 As shown, a pressure cap 500 is provided below the traction beam 100. The pressure cap 500, pin sleeve 200, and center pin 300 are adapted to be fixed together by fasteners. The pressure cap 500 can protect the traction beam 100, pin sleeve 200, and center pin 300 from below. A connecting hole is constructed on the pressure cap 500, and a threaded hole is constructed at the bottom of the center pin 300. Bolt-type fasteners are sequentially inserted into the connecting hole of the pressure cap 500, the mounting channel 110 of the pin sleeve 200, and the threaded hole of the center pin 300 to achieve the connection between the pressure cap 500, pin sleeve 200, and center pin 300.

[0049] The middle part of the pressure cap 500 protrudes towards the pin sleeve 200 so that the middle part of the pressure cap 500 can abut against the center pin 300. With the fastener locking and fixing, a stable connection is formed between the pressure cap 500, the pin sleeve 200 and the center pin 300.

[0050] According to the central traction device provided by the present invention, one end of the connecting rod 400 is adapted to be installed on the connecting part 120 through a rubber node, and the other end of the connecting rod 400 is adapted to be connected to the frame mounting seat 600 through a rubber node, and the frame mounting seat 600 is adapted to be connected to the frame.

[0051] Rubber joints connect the two ends of the connecting rod 400 to the connecting part 120 and the frame mounting base 600, respectively. The rubber joints and the connecting rod 400 allow for longitudinal swinging between the connecting rod 400 and the center pin 300, thereby releasing vertical motion. In other words, the vertical load can be released by swinging.

[0052] like Figure 4 As shown, the connecting rod 400 extends away from the traction beam 100 and has a downwardly sloping bend. The bend design allows the connection end of the connecting rod 400 to the frame to be lower, which facilitates the structural design of the frame.

[0053] Please continue to refer to Figure 4 The connecting rod 400 has a first connecting ring 410 and a second connecting ring 420 at both ends. The first connecting ring 410 is horizontally positioned and is adapted to connect the rubber node and fastener to the connecting part 120. The second connecting ring 420 is vertically positioned and is adapted to connect the rubber node and fastener to the frame mounting base 600. After the rubber node is installed, the center hole of the horizontally positioned first connecting ring 410 will be vertically arranged to facilitate connection with the connecting part 120 via fasteners. After the rubber node is installed, the center hole of the vertically positioned second connecting ring 420 will be horizontally arranged to facilitate connection with the frame mounting base 600 via fasteners.

[0054] On the other hand, the present invention also provides a bogie, including a frame and a central traction device as described in the foregoing embodiments, wherein the central traction device is mounted on the frame.

[0055] In this embodiment, by installing the aforementioned central traction device on the frame, the pin sleeve 200 is connected via the mounting channel 110 of the traction beam 100, and the center pin 300 is installed in the pin hole 210 of the pin sleeve 200, thus achieving mutual assembly between the traction beam 100, the pin sleeve 200, and the center pin 300. The connecting portion 120 on the outer surface of the traction beam 100 is connected to the frame via the connecting rod 400, so as to transmit the longitudinal load to the frame via the connecting rod 400. At the same time, the traction beam 100 can also form a connection with the frame via the connecting rod 400. The pin sleeve 200 swings to release the vertical load. The free clearance 220 inside the pin sleeve 200 makes the pin sleeve 200 softer in the lateral direction and harder in the longitudinal direction. While ensuring the transmission of longitudinal load, it reduces the constraint on lateral movement within a certain displacement and avoids adding large lateral stiffness. At the same time, when the lateral displacement exceeds the limit, the two inner sidewalls of the free clearance 220 contact each other to achieve the lateral stop function. This avoids the redundancy of the central traction device structure and achieves lightweighting while retaining the lateral, vertical and longitudinal functions.

[0056] In another aspect, the present invention also provides a rail vehicle, including a car body, the car body being provided with bogies as described in the foregoing embodiments.

[0057] In this embodiment, by installing the aforementioned bogie on the vehicle body, the pin sleeve 200 is connected via the mounting channel 110 of the traction beam 100, and the center pin 300 is installed in the pin hole 210 of the pin sleeve 200, thus achieving mutual assembly between the traction beam 100, the pin sleeve 200, and the center pin 300. The connecting portion 120 on the outer surface of the traction beam 100 is connected to the frame via the connecting rod 400, so as to transmit the longitudinal load to the frame via the connecting rod 400. At the same time, the traction beam 100 can also form a swing with the frame via the connecting rod 400. The free clearance 220 inside the pin sleeve 200 allows the pin sleeve 200 to be softer in the lateral direction and harder in the longitudinal direction. While ensuring the transmission of longitudinal load, it reduces the constraint on lateral movement within a certain displacement, avoiding the addition of large lateral stiffness. At the same time, when the lateral displacement exceeds the limit, the two inner sidewalls of the free clearance 220 contact each other to achieve the lateral stop function. This avoids the redundancy of the central traction device structure and achieves lightweighting while retaining the lateral, vertical and longitudinal functions.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A central traction device, characterized in that, include: The traction beam (100) has an installation channel (110) along its height direction, and the outer surface of the traction beam (100) has a connecting part (120); A pin sleeve (200) is installed in the mounting channel (110). The pin sleeve (200) has a pin hole (210) and two free gaps (220) constructed along the height direction. Along the width direction of the rail vehicle, the two free gaps (220) are located on both sides of the pin hole (210). A center pin (300) is installed in the pin hole (210); The connecting rod (400) has one end connected to the connecting part (120) and the other end adapted to be connected to the frame; The connecting part (120) is provided as four, and the four connecting parts (120) are distributed circumferentially along the outer surface of the traction beam (100), and each pair of adjacent connecting parts (120) are arranged at an angle; The cross-section of the free gap (220) is arc-shaped, and the two free gaps (220) are located on the same circumference. Each free gap (220) corresponds to two gap ends, and the positions of the four connecting parts (120) correspond to the four gap ends.

2. The central traction device according to claim 1, characterized in that, Along the top-to-bottom direction, the mounting channel (110) is configured to taper, the center pin (300) is adapted to the mounting channel (110), and the center pin (300) is adapted to be inserted into the mounting channel (110) from above the traction beam (100).

3. The central traction device according to claim 2, characterized in that, A pressure cap (500) is provided below the traction beam (100), and the pressure cap (500), the pin sleeve (200) and the center pin (300) are adapted to be fixed to each other by fasteners.

4. The central traction device according to claim 1, characterized in that, One end of the connecting rod (400) is adapted to be installed on the connecting part (120) via a rubber node, and the other end of the connecting rod (400) is adapted to be connected to a frame mounting base (600) via a rubber node. The frame mounting base (600) is adapted to be connected to the frame.

5. The central traction device according to claim 4, characterized in that, The connecting rod (400) extends away from the traction beam (100) and is constructed with a downwardly inclined bent section.

6. The central traction device according to claim 4, characterized in that, The connecting rod (400) has a first connecting ring (410) and a second connecting ring (420) at its two ends respectively. The first connecting ring (410) is horizontally arranged and is adapted to be connected to the connecting part (120) by rubber nodes and fasteners. The second connecting ring (420) is vertically arranged and is adapted to be connected to the frame mounting base (600) by rubber nodes and fasteners.

7. A bogie, characterized in that, It includes a frame and a central traction device as described in any one of claims 1-6, wherein the central traction device is mounted on the frame.

8. A rail vehicle, characterized in that, Includes a vehicle body, wherein the vehicle body is provided with a bogie as described in claim 7.

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