Primary suspension device of bogie

Abstract

The present invention relates to a primary suspension device for a bogie of a rail vehicle, in particular a primary suspension that is fixed between an axle box and a frame by a rubber spring. By adapting the outer shape of the rubber spring to the outer surface of the axle box body, the present invention achieves fitting with the outer surface of the axle box body, thereby reducing the occupied space and increasing the shock absorption contact surface at the same time.

Description

Technical Field

[0001] The present invention relates to a primary suspension device for a bogie of a rail vehicle, in particular to a primary suspension fixed between an axle box and a frame by a rubber spring. Background Art

[0002] The existing primary suspension device using a rubber spring is as Figure 1 shown. This primary suspension device includes an axle box body shell A1, a primary suspension seat A3, and a rubber spring A2 installed between the axle box body and the primary suspension mounting seat. The existing suspension device has the following problems: 1) The rubber spring is installed between the axle box body shell and the primary suspension seat, and the positioning of the irregular space among the three is relatively complex, and the processability is poor; 2) Since the rubber spring occupies part of the space of the axle box, especially the space of the axle box bearing, the axle load of the bogie is limited and it is generally used for light rail vehicles; 3) The primary suspension seat is of a U-shaped structure, and a lifting rod A4 is installed at its bottom. The lifting rod cooperates with the axle box body to realize the primary lifting function. Therefore, this lower suspension device has great limitations on the frame structure and can only be applied to a two-axle bogie; 4) The weight of the whole set of devices is relatively large. Summary of the Invention

[0003] The purpose of the present invention is to provide a new type of primary suspension device for a bogie, which has a simple structure, occupies less space, is light in weight, can adapt to a larger axle load, and can be applied to a two-axle or three-axle bogie.

[0004] To achieve the above-mentioned invention purpose, the technical solution proposed by the present invention is: a primary suspension device for a bogie, including an axle box body shell, a rubber spring, and a primary suspension seat, wherein

[0005] the rubber spring is a rubber body, and one surface of the rubber spring adapts to the outer surface of the axle box body shell and is arranged on the outer surface of the axle box body shell; the primary suspension seat is connected to the axle box shell.

[0006] By adapting the outer shape of the rubber spring to the outer surface of the axle box body shell, the present invention achieves fitting with the outer surface of the axle box body, thereby reducing the occupied space and increasing the damping contact surface at the same time.

[0007] A further improvement lies in that the outer surface of the axle box body shell in contact with the rubber spring is arc-shaped, and the rubber spring fits this arc. The arc is a better stress surface. Therefore, if the axle box body shell, especially the position where the rubber spring is installed, is designed to be arc-shaped, the corresponding contact surface of the rubber spring is also arc-shaped to fit with the axle box body shell. Such a design can improve the bearing capacity to adapt to vehicles with a larger axle load.

[0008] According to an embodiment of the present invention, preferably, the length and / or width of the arc-shaped partition or the arc-shaped cover plate is greater than the corresponding length and / or width of the rubber spring, so that the edges of the arc-shaped partition and the arc-shaped cover plate extend beyond the edges of the rubber spring. Such a structural feature ensures that when the rubber spring deforms under force, it will not extend beyond the edges of the arc-shaped partition and / or the arc-shaped cover plate, thereby protecting the rubber spring.

[0009] To improve the buffering effect of the rubber spring, the rubber spring is designed to be multi-layered, and arc-shaped partitions are provided between the layers. The arc-shaped partition can be made of an elastic steel plate, such as a spring plate.

[0010] On the top surface of the rubber spring, or when it is a multi-layer rubber spring, the top surface of the uppermost rubber spring is covered with an arc-shaped cover plate that fits the top surface. The purpose is to achieve positioning cooperation with the primary suspension seat through the arc-shaped cover plate and transmit traction and braking forces.

[0011] A plurality of rubber springs are arranged at intervals along the outer surface of the axle box housing. Preferably, the rubber springs are arranged symmetrically with respect to the axis of the axle box to ensure equal stiffness and damping on both sides and balanced force. The arrangement of multiple rubber springs can effectively reduce the vertical stiffness compared to a single-piece rubber spring, and the dynamic performance of the bogie can be optimized by adjusting the spring stiffness.

[0012] In the present invention, preferably, the rubber spring is connected and fixed by vulcanization to the surface in contact with it.

[0013] Preferably, the outer surface of the axle box housing is circular, and the rubber spring, the arc-shaped partition or / and the arc-shaped cover plate are concentric with the outer surface of the axle box housing.

[0014] According to the present invention, the outer surface of the arc-shaped cover plate is provided with a plurality of first bosses; the primary suspension seat is provided with second bosses or grooves corresponding to the bosses. The cooperation between the first bosses and the second bosses completes the positioning of the suspension device, including lateral positioning and longitudinal positioning.

[0015] The primary suspension seat arranged on the frame includes a lower cover plate of the side beam and support plates symmetrically arranged under the lower cover plate of the side beam, and an arc-shaped surface matching the arc-shaped cover plate is provided on the support plates to make them fit.

[0016] The beneficial effects of the present invention can be reflected from its structure.

[0017] 1) Since the rubber spring is solidified on the axle box housing, an integral axle box suspension device is formed, which reduces weight and occupies less space. Further, since the rubber spring adopts an integral multi-layer fan-shaped structure centered on the axle of the axle box, it does not occupy the space of the axle box bearing, and can effectively improve the bearing capacity and adapt to vehicles with a large axle load;

[0018] 2) Since the primary suspension seat of the frame is the lower cover plate of the side beam and the support plates symmetrically arranged under the lower cover plate of the side beam, it can be adapted to two-axle or three-axle bogies;

[0019] 3) Since the rubber spring can provide stiffness and damping in all directions, the primary suspension device of the present invention does not need to be equipped with an independent shock absorber, and the structure is simpler. Description of the Drawings

[0020] Figure 1 is a schematic diagram of a primary suspension device in the prior art;

[0021] Figure 2 is a schematic structural diagram of an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the axle box housing with the rubber spring cured in the embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the primary suspension seat in the embodiment of the present invention. Detailed Embodiments

[0024] Refer to Figure 2 、 3 In the embodiment of the present invention, a primary suspension device of a rail vehicle is shown, including a rubber spring 102 arranged between the frame and the axle box. Only the axle box housing 101 is shown in the figure. The rubber spring 102 is in the form of a rubber block and is attached to the outer surface of the axle box housing 101. Since the axle box housing 101 is cylindrical, the rubber spring 102 combined with the axle box housing 101 is fan-shaped, and the rubber spring 102 is a multi-layer structure, and arc-shaped partitions 103 are arranged between layers. In this embodiment, it is set to two layers. At the same time, two multi-layer rubber springs 102 are symmetrically arranged on the top of the axle box housing 101. An arc-shaped cover plate 105 is covered on the upper surfaces of the two multi-layer rubber springs 102. The lengths and widths of the arc-shaped cover plate 105 and the arc-shaped partitions 103 are both greater than the lengths and widths of the rubber spring 102. Therefore, the edges of the arc-shaped partitions 103 and the arc-shaped cover plate 105 all extend beyond the edges of the rubber spring. A plurality of first bosses 106, 104 are further provided on the upper surface of the arc-shaped cover plate 105. Among them, the first boss 106 in the middle position of the arc-shaped cover plate 105 plays a longitudinal stop role, while the first bosses 104 at both ends of the upper surface of the arc-shaped cover plate play a transverse stop role.

[0025] Refer to Figure 4, in a series of suspension devices disclosed in the embodiments of the present invention, a series of suspension seats are arranged on a frame (the frame is not shown). The lower cover plate 201 of the side beam of the frame and the support plates 204 symmetrically arranged under the lower cover plate 201 of the side beam, and an arc surface 203 matching the arc cover plate 105 is provided on the support plate 204 so that the two fit together. A space is formed between the tops of the two relatively arranged support plates 204 to accommodate the protrusion 106 on the arc cover plate 105 that plays a longitudinal stop role, and a second protrusion 202 for positioning the first protrusions at both ends of the upper surface of the arc cover plate is arranged at the lower end of the support plate, thereby playing a lateral positioning role. A reinforcing member 205 is also provided between the two support plates 204 arranged at the same end of the lower cover plate 201 of the side beam.

Claims

1. A primary suspension device for a bogie, comprising an axle box housing (101), a rubber spring (102), and a primary suspension seat (2), characterized in that: The rubber spring (102) is a rubber body, one surface of the rubber spring (102) conforms to the outer surface of the axle box housing (101) and is arranged on the outer surface of the axle box housing (101); an arc-shaped cover plate (105) that fits the top surface is provided on the top surface of the rubber spring (102), and a plurality of first bosses (106, 104) are provided on the outer surface of the arc-shaped cover plate. A second boss or groove (206, 202) corresponding to the boss is provided on the primary suspension seat. A plurality of the rubber springs (102) are arranged at intervals along the outer surface of the axle box housing (101). The rubber spring (102) is connected to the outer surface of the axle box housing (101) by vulcanization. The primary suspension seat is connected to the axle box housing (101).

2. The primary suspension device of the bogie according to claim 1, wherein The outer surface of the axle box housing (101) in contact with the rubber spring (102) is arc-shaped, and the rubber spring (102) fits this arc.

3. The primary suspension device of the bogie according to claim 2, characterized in that The rubber spring (102) is multi-layered, and an arc-shaped partition (103) is provided between the multi-layers.

4. The primary suspension device of the bogie according to claim 3, characterized in that The length and / or width of the arc-shaped partition (103) or the arc-shaped cover plate (105) is greater than the corresponding length and / or width of the rubber spring (102), so that the edges of the arc-shaped partition (103) and the arc-shaped cover plate (105) extend beyond the edges of the rubber spring.

5. The primary suspension device of the bogie according to claim 3 or 4, characterized in that The outer surface of the axle box housing (101) is circular, and the rubber spring (102), the arc-shaped partition (103) and / or the arc-shaped cover plate (105) are concentric with the outer surface of the axle box housing.

6. The primary suspension device of the bogie according to claim 1, characterized in that An arc-shaped surface matching the arc-shaped cover plate (105) is provided on the primary suspension seat.

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