Drawbar, coupler and method for manufacturing a drawbar

Abstract

The present invention provides a drawbar, comprising: a metal component, the metal component including: two metal parts, on the outer surfaces of the two metal parts, a plurality of protrusion groups are arranged, and the plurality of protrusion groups are arranged around the outer surfaces of the metal parts; a fiber component, the fiber component including: continuous fiber filaments, the continuous fiber filaments are wound around the plurality of protrusion groups to form the fiber component, the fiber component wraps at least part of the metal parts, the protrusion groups penetrate through at least part of the fiber component, and the fiber component connects the two metal parts. The drawbar provided by the present invention can reduce costs, effectively reduce the weight of the drawbar itself, is beneficial to the lightweighting of rail trains and energy conservation and consumption reduction, and also improves the corrosion resistance. The present invention also provides a coupler and a manufacturing method of the drawbar.

Description

Technical Field

[0001] The present invention belongs to the field of couplers for rail trains, and particularly relates to a drawbar, a coupler and a method for manufacturing a drawbar. Background Art

[0002] As a key component of a rail train, a coupler is used to connect a locomotive and a vehicle or between vehicles, and transmit the traction force and impact force between trains. The coupler includes a drawbar, and the drawbar is used to transmit the longitudinal force when the rail train is running. For the existing drawbar, in order to ensure sufficient strength, it is usually made of metal materials.

[0003] However, when mass-produced, the drawbar made of metal materials has a high cost and a large weight, which is not conducive to the lightweight of rail trains and energy conservation and consumption reduction. Summary of the Invention

[0004] Aiming at the technical problems of high cost and large weight of the existing drawbar during mass production, the present invention provides a drawbar that can reduce costs, effectively reduce the weight of the drawbar itself, is conducive to the lightweight of rail trains and energy conservation and consumption reduction, and also improves the corrosion resistance. The present invention also provides a coupler and a method for manufacturing a drawbar.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A drawbar, comprising:

[0007] A metal component, the metal component includes:

[0008] Two metal pieces, on the outer surfaces of the two metal pieces, a plurality of protrusion groups are provided, and the plurality of protrusion groups are arranged around the outer surfaces of the metal pieces;

[0009] A fiber component, the fiber component includes:

[0010] Continuous fiber filaments, the continuous fiber filaments are wound around multiple groups of the protrusions to form the fiber component, the fiber component wraps at least part of the metal piece, the protrusions pass through at least part of the fiber component, and the fiber component connects the two metal pieces.

[0011] Further, the protrusion group includes a plurality of protrusions, the cross-section of the protrusion is a rhombus structure, and the protrusion has four contact surfaces; during the winding process, the continuous fiber filaments have two winding directions, and each two adjacent contact surfaces are respectively parallel to the two winding directions, and the continuous fiber filaments are in contact with at least one of the contact surfaces.

[0012] Further, the protrusion is a pyramid structure with a flat or arc-shaped top.

[0013] Furthermore, a plurality of the protrusions within one protrusion group are arranged at intervals along a winding direction of the continuous fiber filament; the protrusions and adjacent protrusions within another adjacent protrusion group are arranged at intervals along another winding direction of the continuous fiber filament.

[0014] Furthermore, the protrusions are integrally formed with the metal part.

[0015] Furthermore, the protrusions are welded or bonded or riveted to the metal part.

[0016] Furthermore, the metal assembly further includes:

[0017] A connecting piece, which is connected to the metal part.

[0018] Furthermore, the connecting piece and the metal part are connected to each other by threads.

[0019] Furthermore, the connecting piece is of a flange structure.

[0020] The present invention also provides a coupler, including the drawbar described in any one of the above.

[0021] The present invention also provides a method for manufacturing a drawbar, including the following steps:

[0022] (1) Fix two metal parts and a mold.

[0023] (2) Connect one end of the continuous fiber filament to a protrusion of a metal part, and the continuous fiber filament is spirally wound on the mold along the direction of a contact surface of the protrusion.

[0024] (3) The continuous fiber filament is wound to a protrusion of another metal part, the winding direction is changed, and the continuous fiber filament is spirally wound on the mold along the direction of another contact surface of the protrusion.

[0025] (4) Repeat step (3) until the thickness of the continuous fiber filament is greater than the height of the protrusion, and then the fiber assembly is wound and formed.

[0026] (5) The continuous fiber filament is circumferentially wound at the gap between the metal part and the fiber assembly to form a drawbar.

[0027] Furthermore, in step (2), the continuous fiber filament is impregnated with resin before winding; or, the continuous fiber filament is pre-impregnated with resin.

[0028] It further includes the following step: (6) Curing the drawbar at high temperature.

[0029] (7) Demoulding the drawbar after high-temperature curing.

[0030] Furthermore, it further includes the following steps:

[0031] (6) Impregnate the formed drawbar with resin;

[0032] (7) Cure the drawbar at high temperature;

[0033] (8) Demold the drawbar after high-temperature curing.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1. The drawbar provided by the present invention includes a metal component and a fiber component. The metal component includes two metal parts, and a plurality of protruding part groups are arranged on the metal parts. The plurality of protruding part groups are arranged around the outer surface of the metal part. The fiber component includes continuous fiber filaments, and the continuous fiber filaments are wound between the plurality of protruding part groups to form a fiber component. The fiber component wraps at least part of the metal part, at least part of the protruding part group passes through the fiber component, and the fiber component connects the two metal parts. For the drawbar provided by the present invention, the fiber component is formed by winding continuous fiber filaments around the protruding part groups of the metal part. Using fiber materials to replace metal materials at least partially can reduce costs, effectively reduce the weight of the drawbar itself, is beneficial to the lightweight of rail trains and energy conservation and consumption reduction, and at the same time improves the corrosion resistance of the product.

[0036] 2. For the drawbar provided by the present invention, the protruding part group has a plurality of protruding parts, the cross-section of the protruding part is a rhombus structure, the protruding part has four contact surfaces, and during the winding process of the continuous fiber filaments, the four contact surfaces are respectively parallel to the winding direction of the continuous fiber filaments, and the continuous fiber filaments are in contact with at least one contact surface. For the drawbar provided by the present invention, the cross-section of the protruding part is a rhombus structure, and the contact surface of the protruding part is parallel to the winding direction of the continuous fiber filaments. During the winding process, the contact area between the contact surface and the continuous fiber filaments can be increased, the gap between the protruding part and the continuous fiber filaments can be reduced, so that the connection between the continuous fiber filaments and the protruding part is tighter, and problems such as stress concentration and defects after the drawbar is formed can be reduced, thereby improving the connection strength between the fiber component and the metal component, and further enhancing the reliability of the drawbar. Description of the Drawings

[0037] Figure 1 is a schematic structural diagram of the drawbar provided in this embodiment;

[0038] Figure 2 is Figure 1 the schematic cross-sectional structure of the drawbar provided Figure 1 ;

[0039] Figure 3 is Figure 1 the schematic cross-sectional structure of the drawbar provided Figure 2 ;

[0040] Figure 4 is Figure 1 a schematic structural diagram of the metal component in

[0041] Figure 5 is Figure 3 a partially enlarged schematic structural diagram of the metal component provided in

[0042] Figure 6 is Figure 1 a schematic diagram of the connection structure between the metal component and the fiber component in Figure 1 ;

[0043] Figure 7 is Figure 1 a schematic diagram of the connection structure between the metal component and the fiber component in Figure 2 ;

[0044] Figure 8 is Figure 1 a schematic diagram of the connection structure between the metal component and the fiber component in Figure 3 ;

[0045] Specific descriptions of the reference numerals in the drawings are as follows:

[0046] 1. Metal component; 11. Metal part; 111. Protrusion; 112. Contact surface; 12. Connecting piece;

[0047] 2. Fiber component; 21. Continuous fiber filaments. Specific embodiments

[0048] Next, the technical solutions in the specific embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. Obviously, the described embodiments are only partial specific embodiments of the overall technical solution of the present invention, rather than all embodiments. Based on the overall concept of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0050] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] Aiming at the technical problems of the existing drawbars with high cost and large weight, the present invention provides a drawbar, which can reduce the cost, effectively reduce the weight of the drawbar itself, is beneficial to the lightweight of rail trains and energy conservation and consumption reduction, and also improves the corrosion resistance. The present invention also provides a coupler and a manufacturing method of the drawbar. The technical solutions of the present invention will be specifically described below in conjunction with specific embodiments.

[0052] This embodiment provides a drawbar, including:

[0053] A metal component 1, and the metal component 1 includes:

[0054] Two metal parts 11, and a plurality of protruding part groups are arranged on the outer surfaces of the two metal parts 11, and the plurality of protruding part groups are arranged around the outer surface of the metal part 11;

[0055] A fiber component 2, and the fiber component 2 includes:

[0056] Continuous fiber filaments 21, and the continuous fiber filaments 21 are wound around the plurality of protruding part groups to form the fiber component 2. The fiber component 2 wraps at least part of the metal part 11, the protruding part 111 passes through at least part of the fiber component 2, and the fiber component 2 connects the two metal parts 11.

[0057] The drawbar provided in this embodiment includes a metal component 1 and a fiber component 2. The metal component 1 includes two metal parts 11, and a plurality of protruding part groups are arranged on the metal parts 11, and the plurality of protruding part groups are arranged around the outer surface of the metal part 11. The fiber component 2 includes continuous fiber filaments 21, and the continuous fiber filaments 21 are wound between the plurality of protruding part groups to form the fiber component 2. The fiber component 2 wraps at least part of the metal part 11, the protruding part 111 at least partially passes through the fiber component 2, and the fiber component 2 connects the two metal parts 11. For the drawbar provided in this embodiment, the fiber component 2 is formed by winding continuous fiber filaments 21 around a plurality of protruding part groups of the metal part 11. The fiber component 2 and the metal component 1 are connected to form a drawbar. Using fiber materials to at least partially replace metal materials can reduce the cost, effectively reduce the weight of the drawbar itself, is beneficial to the lightweight of rail trains and energy conservation and consumption reduction, and also improves the corrosion resistance.

[0058] Specifically, referring to Appendix Figure 1 to Appendix Figure 8, the drawbar provided in this embodiment includes a metal component 1 and a fiber component 2. The metal component 1 is connected to the fiber component 2. The drawbar provided in this embodiment uses fiber material to replace metal material, which can ensure strength while reducing its own weight and improving corrosion resistance.

[0059] More specifically, the fiber component 2 includes continuous fiber filaments 21. The fiber component 2 is formed by winding the continuous fiber filaments 21, and the fiber component 2 is connected to the metal component 1. In particular, the continuous fiber filaments 21 can be wound in a spiral direction to form the fiber component 2. The spiral angle of the spiral direction is ±0° to 90°. Preferably, the continuous fiber filaments 21 are wound in a 45° spiral direction to form the fiber component 2. The continuous fiber filaments 21 can be carbon fiber material, or glass fiber or aramid fiber. Preferably, the continuous fiber filaments 21 are impregnated with resin.

[0060] Refer to the attached Figure 1 to the attached Figure 4 , the metal component 1 includes two metal parts 11, and the fiber component 2 connects the two metal parts 11. Preferably, the metal part 11 can be a rotary body structure, and more preferably an internally hollow rotary body structure to reduce weight. In order to connect with the fiber component 2, a plurality of protrusion groups are provided on the outer surface of the metal part 11, and the plurality of protrusion groups are arranged around the outer surface of the metal part 11. Especially when the metal part 11 is a rotary body structure, the plurality of protrusion groups are evenly circumferentially arranged around the outer surface of the metal part 11. Refer to the attached Figure 6 , the continuous fiber filaments 21 are wound around the plurality of protrusion groups to form the fiber component 2. The fiber component 2 wraps at least part of the metal part 11. The protrusion groups pass through at least part of the fiber component 2, and the fiber component 2 connects the two metal parts 11 to realize the connection between the fiber component 2 and the metal part 11.

[0061] In the drawbar provided in this embodiment, the protrusion group has a plurality of protrusions 111. To further improve the connection strength between the continuous fiber filaments 21 and the metal part 11, the cross-section of the protrusion 111 is a rhombus structure. Specifically, refer to the attached Figure 5 to the attached Figure 8, the protrusion 111 has four contact surfaces 112. During the winding process, the continuous fiber filaments 21 have two winding directions, namely the forward winding direction and the reverse winding direction. Each two adjacent contact surfaces 112 are respectively parallel to the two winding directions. The winding fiber filaments 21 are in contact with at least one contact surface 112. Specifically, during the winding process, when the continuous fiber filaments 21 wind from one metal part 11 to another metal part 11, the continuous fiber filaments 21 are in contact with one of the contact surfaces 112; during the reverse winding, the continuous fiber filaments 21 are in contact with the adjacent contact surface 112. During the winding and forming process of the fiber assembly 2, the continuous fiber filaments 21 will come into contact with all four contact surfaces 112. In the drawbar provided in this embodiment, since the cross-section of the protrusion 111 is a rhombus structure, the contact surface 112 of the protrusion 111 is parallel to the winding direction of the continuous fiber filaments 21, which can increase the contact area between the contact surface 112 and the continuous fiber filaments 21 during the winding process, eliminate the gap between the protrusion 111 and the continuous fiber filaments 21, make the connection between the continuous fiber filaments 21 and the protrusion 111 tighter, reduce problems such as stress concentration and defects after the drawbar is formed, thereby improving the connection strength between the fiber assembly 2 and the metal assembly 1, and further enhancing the reliability of the drawbar. As a further preference, for the convenience of winding the continuous fiber filaments and improving the wrapping property of the continuous fiber filaments, the protrusion 111 is a pyramid structure with a flat or arc-shaped top surface.

[0062] To further improve the connection strength between the continuous fiber filaments 21 and the metal part 11, multiple protrusions 111 in a protrusion group are arranged at intervals along the helical direction in which the continuous fiber filaments 21 are wound. And the protrusion 111 and the adjacent protrusions in another adjacent protrusion group are arranged at intervals along the other winding direction of the continuous fiber filaments. The drawbar provided in this embodiment can enable the continuous fiber filaments 21 to be in contact with multiple protrusions 111 in both winding directions, thereby improving the connection strength between the continuous fiber filaments 21 and the metal part 11. In other embodiments, the multiple protrusions 111 can be arranged at equal distances, or can be arranged with variable distances according to requirements such as connection strength and winding pattern.

[0063] The protrusion 111 can be detachably connected to the metal part 11. For example, the protrusion 111 is welded or bonded or riveted to the metal part 11. Optionally, the protrusion 111 and the metal part 11 can also be integrally formed.

[0064] To enable the drawbar provided in this embodiment to be connected to other structural members, the metal assembly 1 further includes a connecting member 12. Refer to the attached Figure 2 , the connecting member 12 is connected to the metal part 11, and the connecting member 12 can be integrally formed with the metal part 11. Refer to the attached Figure 3, the connecting member 12 can also be separately connected to the metal member 11. For example, it can be connected by threading. The connecting member 12 can be a flange structure, a hook structure, or other structures that can play a connecting role.

[0065] This embodiment also provides a coupler, which includes the drawbar provided in this embodiment.

[0066] This embodiment also provides a method for manufacturing a drawbar, which includes the following steps:

[0067] (1) Fix two metal members 11 and the mold.

[0068] (2) Connect one end of the continuous fiber filament 21 to the protruding portion 111 of a metal member 11, and the continuous fiber filament 21 is spirally wound on the mold along the direction of a contact surface 112 of the protruding portion 111.

[0069] (3) When the continuous fiber filament 21 is wound to the protruding portion 111 of the other metal member 11, change the winding direction, and the continuous fiber filament 21 is spirally wound on the mold along the direction of the other contact surface 112 of the protruding portion 111.

[0070] (4) Repeat step (3) until the thickness of the continuous fiber filament 21 is greater than the height of the protruding portion 111, then the fiber assembly 2 is wound and formed.

[0071] (5) The continuous fiber filament 21 is wound circumferentially at the gap between the metal member 11 and the fiber assembly 2 to form a drawbar.

[0072] Specifically, for the method for manufacturing a drawbar provided in this embodiment, first, two metal members 11 and the mold are fixed. Specifically, the two metal members 11 are respectively connected to the mold, and the two metal members 11 and the mold are connected to the rotating mechanism of the winding machine through a tooling.

[0073] Then, connect the continuous fiber filament 21 to the protruding portion 111 of a metal member 11, especially the protruding portion 111 on the metal member 11 that is closest to the connecting member 12. The winding machine drives the two metal members 11 and the mold to rotate, and the wire guiding head moves. The continuous fiber filament 21 is sequentially in contact with a group of protruding portions 111 along the direction of a contact surface 112 of the protruding portion 111 and is spirally wound on the mold.

[0074] When the continuous fiber filament 21 is wound to the protruding portion 111 of the other metal member 11, the wire guiding head of the winding machine drives the continuous fiber filament 21 to bypass the protruding portion 111 and then changes the winding direction, and the continuous fiber filament 21 is spirally wound on the mold along the direction of the other contact surface 112 of the protruding portion 111.

[0075] Repeat the above process until the thickness of the continuous fiber filament 21 wound is greater than the height of the protrusion 111, so that the formed fiber assembly 2 wraps the metal part 11, and then the fiber assembly 2 is formed by winding.

[0076] The winding machine controls the continuous fiber filament 21 to wind circumferentially at the gap between the metal part 11 and the fiber assembly 2 to further strengthen the connection strength between the fiber assembly 2 and the metal part 11, thereby forming a traction rod.

[0077] To improve the overall strength of the traction rod formed by winding the continuous fiber filament, in the method for manufacturing a traction rod provided in this embodiment, in the above step (2), the continuous fiber filament is impregnated with resin before winding. Alternatively, the continuous fiber filament used in step 2 is pre-impregnated with resin. The method for manufacturing a traction rod provided in this embodiment further includes the following steps:

[0078] (6) Cure the traction rod at high temperature;

[0079] (7) Demold the traction rod after high-temperature curing.

[0080] In the method for manufacturing a traction rod provided in this embodiment, the continuous fiber filament is impregnated with resin before winding, or the continuous fiber filament is pre-impregnated with resin, and then wound to form a traction rod. The formed traction rod is cured at high temperature, so that the resin envelopes the continuous fiber filament, thereby improving the connection strength between the continuous fiber filaments and between them and the metal part 11, and further improving the overall strength of the traction rod. After high-temperature curing, the traction rod is demolded to obtain the traction rod provided in this embodiment.

[0081] In another embodiment, the method for manufacturing a traction rod further includes the following steps:

[0082] (6) Impregnate the formed traction rod with resin;

[0083] (7) Cure the traction rod at high temperature;

[0084] (8) Demold the traction rod after high-temperature curing.

[0085] Specifically, for the traction rod provided in another embodiment, after the continuous fiber filament is wound to form a traction rod, the formed traction rod as a whole is impregnated with resin, and the traction rod is placed in a high-temperature curing furnace or a high-temperature curing mold for high-temperature curing. The traction rod after high-temperature curing is demolded to obtain the traction rod provided in this embodiment.

Claims

1. A method for manufacturing a drawbar, characterized in that, The drawbar includes: A metal component, the metal component includes: Two metal parts, on the outer surfaces of the two metal parts, a plurality of protrusion groups are provided, and the plurality of protrusion groups are arranged around the outer surfaces of the metal parts; A fiber component, the fiber component includes: Continuous fiber filaments, the continuous fiber filaments are wound around the plurality of protrusion groups in a spiral direction to form the fiber component, the fiber component wraps at least part of the metal part, the protrusion groups pass through at least part of the fiber component, and the fiber component connects the two metal parts; The protrusion group includes a plurality of protrusions, the cross-section of the protrusion is a rhombus structure, and the protrusion has four contact surfaces; during the winding process, the continuous fiber filaments have two winding directions, namely the forward winding direction and the reverse winding direction, and every two adjacent contact surfaces are respectively parallel to the two winding directions, and the continuous fiber filaments are in contact with at least one of the contact surfaces; The plurality of protrusions in the protrusion group are arranged at intervals along one winding direction of the continuous fiber filaments; the protrusions and the adjacent protrusions in another adjacent protrusion group are arranged at intervals along the other winding direction of the continuous fiber filaments; The manufacturing method includes the following steps: (1) Fix two metal parts and a mold; (2) Connect one end of the continuous fiber filament to a protrusion of one metal part, and the continuous fiber filament is spirally wound on the mold along the direction of one contact surface of the protrusion; (3) The continuous fiber filament is wound to a protrusion of another metal part, the winding direction is changed, and the continuous fiber filament is spirally wound on the mold along the direction of the other contact surface of the protrusion; (4) Repeat step (3) until the thickness of the continuous fiber filament is greater than the height of the protrusion, and then the fiber component is wound and formed; (5) The continuous fiber filament is circumferentially wound at the gap between the metal part and the fiber component to form a drawbar.

2. The manufacturing method of the drawbar according to claim 1, characterized in that The protrusion is a pyramid structure with a flat or arc-shaped top.

3. The method for manufacturing a drawbar according to claim 1 or 2, characterized in that, The protrusion is integrally formed with the metal part.

4. The manufacturing method of the drawbar according to claim 1 or 2, characterized in that, The protrusion is welded or bonded or riveted to the metal part.

5. The manufacturing method of the drawbar according to claim 1 or 2, characterized in that, The metal component further includes: A connecting piece, the connecting piece is connected to the metal part.

6. The manufacturing method of the drawbar according to claim 5, characterized in that, The connecting piece and the metal part are connected to each other by threads.

7. The manufacturing method of the drawbar according to claim 5, characterized in that, The connecting piece is a flange structure.

8. The manufacturing method of the drawbar according to claim 1, characterized in that In step (2), the continuous fiber filament is impregnated with resin before winding; or, the continuous fiber filament is pre-impregnated with resin; It further includes the following steps: (6) Subject the drawbar to high-temperature curing; (7) Demold the drawbar after high-temperature curing.

9. The manufacturing method of the drawbar according to claim 1, characterized in that, It further includes the following steps: (6) Impregnate the formed drawbar with resin; (7) Subject the drawbar to high-temperature curing; (8) Demold the drawbar after high-temperature curing.

10. A coupler, characterized in that, A drawbar manufactured by the drawbar manufacturing method according to any one of claims 1 to 7.

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