Primary suspension and locomotive

Abstract

The utility model discloses a one series suspension device and locomotive relates to rail transit vehicle technical field, and one series suspension device is located between wheelset and bogie frame, and wheelset and bogie frame are connected through axle box, and one series suspension device includes two first hydraulic cylinder, two first elastic parts and second hydraulic cylinder. Two first hydraulic cylinder are located between axle box and bogie frame, and are symmetrically distributed in the both sides of bogie frame. Two first elastic parts are located between axle box and bogie frame. Second hydraulic cylinder is located between two first hydraulic cylinder, and is communicated with two first hydraulic cylinder through hydraulic pipeline. Among them, first hydraulic cylinder only provides the vertical stiffness of wheelset relative to bogie frame, and first elastic part simultaneously provides the vertical stiffness and the lateral roll stiffness of wheelset relative to bogie frame. The one series suspension device, and the vertical stiffness is commonly provided by first hydraulic cylinder and first elastic part, and the lateral roll stiffness of wheelset relative to bogie frame is only provided by first elastic part.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle technology, and in particular to a primary suspension device and locomotive. Background Technology

[0002] The primary suspension is the suspension system between the bogie frame and the axle boxes of locomotives or rail vehicles. It is the core level of the vehicle's suspension system and is also known as the main suspension. Traditionally, the primary suspension uses springs between the axle boxes and the bogie frame to provide primary vertical stiffness and the wheelset's anti-roll stiffness relative to the bogie frame.

[0003] The primary vertical stiffness is mainly determined by the vehicle's load-bearing capacity; the greater the load-bearing capacity, the greater the primary vertical stiffness needs to be. The rolling stiffness of the wheelset relative to the frame is mainly determined by the track twist; the more severe the track twist, the smaller the rolling stiffness of the wheelset relative to the frame should be, to prevent excessive wheel load reduction due to track twist, which could cause the vehicle to derail.

[0004] In existing primary suspension systems, once the primary vertical and lateral spans are determined, the roll stiffness of the wheelset relative to the frame is also determined. This makes it impossible to separately set the primary vertical stiffness and the anti-roll stiffness between the wheelset relative to the frame according to actual needs. Consequently, it cannot resolve the contradiction between the need for greater vertical stiffness in heavily loaded vehicles and the need for less anti-roll stiffness between the wheelset relative to the frame due to track torsion. Therefore, the existing technology still has shortcomings and deficiencies. How to provide a primary suspension system and locomotive that resolves the above contradiction is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a primary suspension device and locomotive, which solves the technical problem that existing primary suspension devices cannot resolve the contradiction between the need for greater vertical stiffness in heavy-load vehicles and the need for less anti-roll stiffness of the wheelset relative frame due to track torsion.

[0006] To achieve the above objectives, this utility model provides a primary suspension device, which is located between the wheelset and the bogie frame, the wheelset and the bogie frame being connected via axle boxes. The primary suspension device includes:

[0007] Two first hydraulic cylinders are located between the axle box and the bogie frame, symmetrically distributed on both sides of the bogie frame;

[0008] Two first elastic elements are located between the axle box and the bogie frame, and are symmetrically distributed on both sides of the bogie frame;

[0009] The second hydraulic cylinder is located between the two first hydraulic cylinders and is connected to the two first hydraulic cylinders through a hydraulic pipeline.

[0010] The first hydraulic cylinder provides only the vertical stiffness of the wheelset relative to the bogie frame, while the first elastic element provides both the vertical stiffness and anti-roll stiffness of the wheelset relative to the bogie frame.

[0011] Preferably, the second hydraulic cylinder includes a piston and a second elastic element disposed within the cylinder body, the piston being movably disposed, and the second elastic element being connected to the piston.

[0012] Preferably, the axle box is hinged to the bogie frame via a hinge member.

[0013] Preferably, when the bogie frame moves vertically relative to the wheelset, the two first elastic elements simultaneously undergo tensile or compressive deformation, providing a portion of the primary vertical stiffness; the two first hydraulic cylinders drive the piston movement in the second hydraulic cylinder and the deformation of the second elastic element through the hydraulic pipeline, providing another portion of the primary vertical stiffness.

[0014] Preferably, when the wheelset undergoes roll motion relative to the bogie frame, one of the first elastic elements undergoes tensile deformation and the other of the second elastic elements undergoes compressive deformation to provide anti-roll stiffness.

[0015] Preferably, the hydraulic lines are equipped with a throttle valve to provide damping to attenuate vibrations between the wheelset and the bogie frame.

[0016] Preferably, the first elastic element is a spring.

[0017] Preferably, the second elastic element is a spring.

[0018] Preferably, the two ends of the first hydraulic cylinder are hinged to the axle box and the bogie frame, respectively.

[0019] This utility model also provides a locomotive, including a primary suspension device provided by any of the above technical solutions.

[0020] Compared to the aforementioned background technology, the suspension device provided by this utility model is flexible and convenient to use. The vertical stiffness is provided by the first hydraulic cylinder and the first elastic element, and the anti-roll stiffness of the wheelset relative to the bogie frame is provided by the first elastic element. The stiffness distribution is achieved through the first hydraulic cylinder and the first elastic element, which can meet the needs of heavy-load vehicles that require greater vertical stiffness, as well as the needs of track twisting that require less anti-roll stiffness of the wheelset relative to the bogie frame.

[0021] The locomotive is capable of producing the same technical effect as a primary suspension system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a primary suspension device provided in an embodiment of the present utility model;

[0024] Figure 2 A schematic diagram illustrating the primary vertical stiffness analysis of the primary suspension device provided in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram illustrating the analysis of the rolling stiffness of the wheelset relative to the bogie frame of the primary suspension device provided in this embodiment of the present invention.

[0026] Figures 1 to 3 Chinese figure reference numerals: 1. First hydraulic cylinder; 2. First elastic element; 3. Hinge; 4. Hydraulic line; 5. Second hydraulic cylinder; 51. Piston; 52. Second elastic element; 6. Axle box; 7. Bogie frame; 8. Wheelset; 9. Throttle valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] This utility model provides a primary suspension device in which the vertical stiffness is provided by the first hydraulic cylinder 1 and the first elastic element 2, and the anti-roll stiffness of the wheelset 8 relative to the bogie frame 7 is provided by the first elastic element 2. By distributing the stiffness of the first hydraulic cylinder 1 and the first elastic element 2, the contradiction between the large vertical stiffness required for heavy-load vehicles and the small anti-roll stiffness of the wheelset 8 relative to the bogie frame 7 required for track twisting can be resolved.

[0030] Please refer to this as well. Figures 1 to 3The primary suspension device provided by this utility model is located between the wheelset 8 and the bogie frame 7. The wheelset 8 and the bogie frame 7 are connected by the axle box 6. The primary suspension device includes two first hydraulic cylinders 1, two first elastic elements 2, and a second hydraulic cylinder 5.

[0031] Two first hydraulic cylinders 1 are located between the axle box 6 and the bogie frame 7. The two ends of the first hydraulic cylinder 1 are connected to the axle box 6 and the bogie frame 7 respectively, and the two first hydraulic cylinders 1 are symmetrically distributed on both sides of the bogie frame 7. Specifically, the two ends of the first hydraulic cylinder 1 are hinged to the axle box 6 and the bogie frame 7 respectively.

[0032] Two first elastic elements 2 are disposed between the axle box 6 and the bogie frame 7. The two ends of the first elastic elements 2 are connected to the axle box 6 and the bogie frame 7 respectively, and the two first elastic elements 2 are symmetrically distributed on both sides of the bogie frame 7. Specifically, the first elastic element 2 is a spring.

[0033] The second hydraulic cylinder 5 is located between the two first hydraulic cylinders 1, and the second hydraulic cylinder 5 is connected to the two first hydraulic cylinders 1 through the hydraulic pipeline 4.

[0034] The first hydraulic cylinder 1 provides only the vertical stiffness of the wheelset 8 relative to the bogie frame 7, while the first elastic element 2 provides both the vertical stiffness and anti-roll stiffness of the wheelset 8 relative to the bogie frame 7.

[0035] The vertical stiffness is provided by the first hydraulic cylinder 1 and the first elastic element 2. The anti-roll stiffness of the wheelset 8 relative to the bogie frame 7 is provided only by the first elastic element 2. The distribution of stiffness is achieved by the first hydraulic cylinder 1 and the first elastic element 2, which can resolve the contradiction between the large vertical stiffness required for heavy-load vehicles and the small anti-roll stiffness of the wheelset 8 relative to the bogie frame 7 required for track twisting.

[0036] This configuration allows for the separate setting of vertical stiffness and roll stiffness between wheelset 8 and bogie frame 7, making it flexible and convenient to use.

[0037] Please refer to this as well. Figures 1 to 3 The second hydraulic cylinder 5 includes a piston 51 and a second elastic element 52 disposed within the cylinder body. The piston 51 is movably disposed, and the second elastic element 52 is connected to the piston 51. Specifically, the second elastic element 52 is a spring.

[0038] Please refer to this as well. Figures 1 to 3 The axle box 6 is hinged to the bogie frame 7 via the hinge 3.

[0039] When the bogie frame 7 moves vertically relative to the wheelset 8, the two first elastic elements 2 simultaneously undergo tensile or compressive deformation, providing a portion of the primary vertical stiffness; the two first hydraulic cylinders 1 drive the piston 51 in the second hydraulic cylinder 5 to move and the second elastic element 52 to deform through the hydraulic pipeline 4, providing another portion of the primary vertical stiffness.

[0040] Specifically, the two first elastic elements 2 undergo tensile or compressive deformation simultaneously, thereby generating a reaction force between the bogie frame 7 and the axle box 6 and providing a portion of the primary vertical stiffness; the two first hydraulic cylinders 1 also undergo tensile or compressive deformation simultaneously, and drive the piston 51 in the second hydraulic cylinder 5 to move and the second elastic element 52 to deform through the hydraulic pipeline 4. The reaction force generated by the deformation of the second elastic element 52 is transmitted to the first hydraulic cylinder 1 through the hydraulic pipeline 4, thereby generating a reaction force between the bogie frame 7 and the axle box 6 and providing a portion of the primary vertical stiffness.

[0041] When the wheelset 8 rolls relative to the bogie frame 7, one of the first elastic elements 2 undergoes tensile deformation, and the other second elastic element 52 undergoes compressive deformation to provide anti-roll stiffness.

[0042] Specifically, one of the first elastic elements 2 undergoes tensile deformation, and the other second elastic element 52 undergoes compressive deformation, thereby generating a reaction force and providing anti-roll stiffness between the bogie frame 7 and the axle box 6; one of the first hydraulic cylinders 1 undergoes tensile deformation, and the other first hydraulic cylinder 1 undergoes compressive deformation, but the total volume of hydraulic oil in the two first hydraulic cylinders 1 remains unchanged, so it will not drive the piston 51 in the second hydraulic cylinder 5 to move or the second elastic element 52 to deform, and it will not generate a reaction force or anti-roll stiffness between the bogie frame 7 and the axle box 6.

[0043] The first elastic element 2 provides a series of vertical stiffnesses as follows: The first hydraulic cylinder 1 provides a series of vertical stiffnesses of Then the total vertical stiffness of the system is ;

[0044] Wherein, L1 is the longitudinal distance between the first hydraulic cylinder 1 and the hinge 3, L2 is the longitudinal distance between the first elastic element 2 and the hinge 3, L3 is the longitudinal distance between the axle and the hinge 3, S1 is the effective area of ​​the first hydraulic cylinder 1, S2 is the effective area of ​​the second hydraulic cylinder 5, K1 is the stiffness of the first elastic element 2, and K2 is the stiffness of the second elastic element 52.

[0045] The roll stiffness of wheelset 8 relative to bogie frame 7 is ;

[0046] Wherein, L1 is the longitudinal distance between the first hydraulic cylinder 1 and the hinge 3, L2 is the longitudinal distance between the first elastic element 2 and the hinge 3, L3 is the longitudinal distance between the axle and the hinge 3, A1 is the lateral distance between the two first hydraulic cylinders 1, and A2 is the lateral distance between the two first elastic elements 2.

[0047] Please refer to this as well. Figures 1 to 3 The hydraulic line 4 is equipped with a throttle valve 9, which provides damping to attenuate vibrations between the wheelset 8 and the bogie frame 7. Since vibration reduction is achieved by using the throttle valve 9 on the hydraulic line 4, no other vibration damping devices are required.

[0048] The suspension device provided by this utility model provides vertical stiffness jointly by the first hydraulic cylinder 1 and the first elastic element 2, while the anti-roll stiffness of the wheelset 8 relative to the bogie frame 7 is provided solely by the first elastic element 2. By distributing stiffness through the first hydraulic cylinder 1 and the first elastic element 2, the contradiction between the need for greater vertical stiffness in heavy-load vehicles and the need for less anti-roll stiffness of the wheelset 8 relative to the bogie frame 7 due to track twisting can be resolved.

[0049] In addition to the primary suspension devices disclosed in the above embodiments, this utility model also provides a locomotive including the above-mentioned primary suspension devices.

[0050] The locomotive includes a primary suspension system, thus enabling it to produce the same technical effects as a primary suspension system.

[0051] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0052] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A primary suspension device, characterized in that, The primary suspension system is located between the wheelset (8) and the bogie frame (7), and the wheelset (8) and the bogie frame (7) are connected by an axle box (6). The primary suspension system includes: Two first hydraulic cylinders (1) are located between the axle box (6) and the bogie frame (7), and are symmetrically distributed on both sides of the bogie frame (7); Two first elastic elements (2) are disposed between the axle box (6) and the bogie frame (7), and are symmetrically distributed on both sides of the bogie frame (7); The second hydraulic cylinder (5) is located between the two first hydraulic cylinders (1) and is connected to the two first hydraulic cylinders (1) through a hydraulic pipeline (4); The first hydraulic cylinder (1) provides only the vertical stiffness of the wheelset (8) relative to the bogie frame (7), while the first elastic element (2) provides both the vertical stiffness and anti-roll stiffness of the wheelset (8) relative to the bogie frame (7).

2. The primary suspension device according to claim 1, characterized in that, The second hydraulic cylinder (5) includes a piston (51) and a second elastic member (52) disposed in the cylinder body. The piston (51) is movably disposed, and the second elastic member (52) is connected to the piston (51).

3. The primary suspension device according to claim 2, characterized in that, The axle box (6) is hinged to the bogie frame (7) via a hinge (3).

4. The primary suspension device according to claim 3, characterized in that, When the bogie frame (7) moves vertically relative to the wheelset (8), the two first elastic elements (2) simultaneously undergo tensile or compressive deformation, providing a portion of the primary vertical stiffness; the two first hydraulic cylinders (1) drive the piston (51) in the second hydraulic cylinder (5) to move and the second elastic element (52) to deform through the hydraulic pipeline (4), providing another portion of the primary vertical stiffness.

5. The primary suspension device according to claim 4, characterized in that, When the wheelset (8) rolls relative to the bogie frame (7), one of the first elastic elements (2) undergoes tensile deformation and the other of the second elastic elements (52) undergoes compressive deformation to provide anti-roll stiffness.

6. The primary suspension device according to claim 5, characterized in that, The hydraulic line (4) is equipped with a throttle valve (9) to provide damping to attenuate the vibration between the wheelset (8) and the bogie frame (7).

7. The primary suspension device according to claim 1, characterized in that, The first elastic element (2) is a spring.

8. The primary suspension device according to claim 2, characterized in that, The second elastic element (52) is a spring.

9. The primary suspension device according to claim 1, characterized in that, The two ends of the first hydraulic cylinder (1) are hinged to the axle box (6) and the bogie frame (7), respectively.

10. A locomotive, characterized in that, Includes the suspension system described in any one of claims 1 to 9.

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