High-speed train bogie axle box with self-lubricating function

Abstract

The utility model discloses a kind of high-speed train bogie axle box with self-lubricating function, including the split type axle box structure being connected with bogie, the axle box structure is divided into upper box and lower box, bearing hole is provided in the center of upper box and lower box, positioning guide mechanism is provided between upper box and lower box, the positioning guide mechanism includes the first locating block being arranged at the top of lower box and the second locating block being arranged at the bottom of upper box, sealing structure is arranged on the contact surface of upper box and lower box, self-lubricating composite gasket and support rail abutment are integrated in the bottom of lower box, oblique spring seat is provided on the lower box, and multiple-stage air spring assembly and hydraulic damper are provided between spring seat and bogie.The utility model split type structure reduces train wheel set replacement time, self-lubricating gasket reduces the friction coefficient between support rail, improves service life, and obliquely arranged air spring dynamically adjusts axle box vertical and lateral stiffness, solves the problem of large friction loss and high maintenance cost of existing axle box.

Description

Technical Field

[0001] This utility model relates to the field of rail transit vehicle technology, and in particular to a high-speed train bogie axle box with self-lubricating function. Background Technology

[0002] On railway locomotives and rolling stock, an axle box is a component mounted on the journal and used to connect the wheelset and the bogie (the running gear of a rail vehicle) frame or the body of a two-axle car. Its function is to transfer the weight and load of the car body to the wheelset, lubricate the journal, reduce friction, and reduce running resistance.

[0003] Existing high-speed train axle boxes suffer from high lubrication dependence and maintenance costs due to sliding friction between the axle box and the supporting rail during track changes or high-speed operation. For example, CN113511230B discloses a high-speed train bogie axle box with an overload self-adjusting structure. When replacing wheelsets, the integral axle box requires disassembly of the entire device, which is time-consuming and labor-intensive. Furthermore, the steering wheel structure at the bottom of the axle box requires a relatively complex roller structure to reduce friction, which increases the processing difficulty. Utility Model Content

[0004] To address the aforementioned technical problems, a high-speed train bogie axle box with self-lubricating function is provided. It features self-lubrication and a modular split structure, aiming to solve the problems of high frictional loss and high maintenance cost of existing axle boxes.

[0005] To achieve the above objectives, this utility model discloses a high-speed train bogie axle box with self-lubricating function, including a split axle box structure connected to the bogie. The axle box structure is divided into an upper box and a lower box, with bearing holes provided at the center of the upper and lower boxes. A positioning and guiding mechanism is provided between the upper and lower boxes. The positioning and guiding mechanism includes a first positioning block provided at the top of the lower box and a second positioning block provided at the bottom of the upper box. A sealing structure is provided on the contact surface between the upper and lower boxes. A self-lubricating composite liner is integrated at the bottom of the lower box and abuts against the support rail. An inclined spring seat is provided on the lower box. A multi-stage air spring assembly and a hydraulic damper are provided between the spring seat and the bogie.

[0006] Furthermore, the upper and lower housings are fixedly connected by high-precision positioning pins and bolts, and the axle box structure is provided with a front end cover and a rear end cover at both ends.

[0007] Furthermore, the rear end cover is located on the side near the train wheelset, and a first positioning block with a triangular structure is provided on the top of the lower housing near the rear end cover, and a second positioning block that matches and is installed on the bottom of the upper housing.

[0008] Furthermore, a third positioning block is provided at the bottom of the second positioning block, and a positioning groove is provided at the top of the lower housing located on the side of the first positioning block. The positioning groove is located below the second positioning block and is matched and installed with the third positioning block. The length of the positioning groove is greater than the length of the third positioning block, and the slope of the inclined side of the trapezoidal structure of the third positioning block and the positioning groove is the same.

[0009] Furthermore, the third positioning block includes a trapezoidal slider and a fixing block disposed on the side of the trapezoidal slider close to the first positioning block, and the positioning groove is provided with a trapezoidal groove and a fixing groove corresponding to the fixing block.

[0010] Furthermore, the sealing structure includes a silicone layer disposed on the contact surface between the upper and lower housings and a sealing ring disposed between the two sets of silicone layers.

[0011] Furthermore, the self-lubricating composite liner is made of graphene-reinforced polytetrafluoroethylene material.

[0012] Furthermore, a temperature sensor and a vibration acceleration sensor are embedded in the outer ring sidewall of the bearing hole of the lower housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a high-speed train bogie axle box with self-lubricating function. The split structure reduces the replacement time of train wheelsets, the self-lubricating pad reduces the friction coefficient between the axle box and the support rail, and improves the service life. The inclined air spring dynamically adjusts the vertical and lateral stiffness of the axle box, solving the problems of high friction loss and high maintenance cost of existing axle boxes. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a schematic diagram of the upper box structure of this utility model.

[0018] Figure 4 This is a schematic diagram showing the installation of the present invention with the bogie and support rail.

[0019] In the diagram: 1 is the upper housing; 11 is the second positioning block; 12 is the third positioning block; 121 is the trapezoidal slider; 122 is the fixing block; 2 is the lower housing; 21 is the first positioning block; 22 is the positioning groove; 221 is the trapezoidal slide groove; 222 is the fixing groove; 23 is the spring seat; 3 is the bearing hole; 4 is the multi-stage air spring assembly; 5 is the front cover; 6 is the rear cover; 7 is the sealing structure; 8 is the self-lubricating composite gasket. Detailed Implementation

[0020] 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.

[0021] One embodiment of this utility model is as follows: Figure 1 , Figure 2 and Figure 4 As shown, the axle box structure is divided into an upper box 1 and a lower box 2. Bearing holes 3 are provided at the center of the upper box 1 and the lower box 2. A positioning and guiding mechanism is provided between the upper box 1 and the lower box 2. The positioning and guiding mechanism includes a first positioning block 21 provided at the top of the lower box 2 and a second positioning block 11 provided at the bottom of the upper box 1. A sealing structure 7 is provided on the contact surface of the upper box 1 and the lower box 2. A self-lubricating composite gasket 8 is integrated at the bottom of the lower box 2 and abuts against the support rail. An inclined spring seat 23 is provided on the lower box 2. A multi-stage air spring assembly 4 and a hydraulic damper are provided between the spring seat 23 and the bogie. The inclined air spring dynamically adjusts the vertical and lateral stiffness of the axle box, improving the stability of high-speed cornering. The split structure facilitates quick disassembly of the wheelset, reducing the time for train wheelset replacement and maintenance. The self-lubricating gasket reduces the friction coefficient between the wheelset and the support rail, improving service life and solving the problems of high friction loss and high maintenance cost of existing axle boxes.

[0022] The upper housing 1 and the lower housing 2 are fixedly connected by high-precision positioning pins and bolts. The two ends of the axle box structure are respectively provided with a front cover 5 and a rear cover 6. After the upper housing and the lower housing are installed, the front and rear covers limit the movement of both.

[0023] The rear end cover 6 is located on the side near the train wheelset. The top of the lower housing 2 near the rear end cover 6 is provided with a first positioning block 21 in a triangular structure. The bottom of the upper housing 1 is provided with a second positioning block 11 that matches and is installed with the first positioning block 21. The bottom of the second positioning block 11 is provided with a third positioning block 12. The top of the lower housing 2 is provided with a positioning groove 22 located on the side of the first positioning block 21. The positioning groove 22 is located below the second positioning block 11 and matches and is installed with the third positioning block 12. The length of the positioning groove 22 is greater than the length of the third positioning block 12, and the slope of the hypotenuse of the trapezoidal structure of the third positioning block 12 and the positioning groove 22 are the same. The third positioning block 12 includes a trapezoidal slider 121 and a fixing block 122 located on the side of the trapezoidal slider 121 near the first positioning block 21. The positioning groove 22 is provided with a trapezoidal sliding groove 221 corresponding to the third positioning block 12 and a fixing groove 222 corresponding to the fixing block 122. The fixing block and the fixing groove are interference fit.

[0024] The sealing structure 7 includes a silicone layer disposed on the contact surface between the upper housing 1 and the lower housing 2, and a sealing ring disposed between the two sets of silicone layers to prevent foreign objects from entering. At the same time, the silicone layer can also play a temporary sealing role when the sealing ring fails.

[0025] The self-lubricating composite gasket 8 is fixed to the bottom of the lower housing via a slot. The self-lubricating composite gasket 8 is made of graphene-reinforced polytetrafluoroethylene (PTFE). PTFE has good self-lubricating properties and can maintain stable performance in both high and low temperature environments. Ceramic self-lubricating gaskets can also be used to improve wear resistance. Compared with the steering wheel structure in the prior art, this design reduces the coefficient of friction while simplifying the self-lubricating gasket structure.

[0026] Temperature sensors and vibration acceleration sensors are embedded in the outer ring side wall of the bearing hole 3 of the lower housing 2. The temperature sensor can be an NTC thermistor. It monitors the operating status of the axle box in real time and uploads the data to the train control system in real time through the CAN bus communication module to realize abnormal alarm. The alarm is triggered when the temperature exceeds the ambient temperature by 55℃ or the vibration amplitude is greater than 5g (g is the acceleration due to gravity).

[0027] The working principle of this embodiment is as follows: First, install the lower housing below the wheelset axle. Align the third positioning block of the upper housing with the positioning groove. Use a rubber mallet or wooden mallet to tap the upper housing along the wheelset axis toward the inside of the wheelset. The shorter trapezoidal slider slides along the trapezoidal groove until the fixing block and the fixing groove are completely engaged. At this time, the second positioning block and the first positioning block are also engaged and positioned. Install the positioning pin, install the front cover and the rear cover, and finally install the air spring assembly and the bogie. When disassembly is required, remove the front cover and the rear cover, tap the upper housing along the wheelset axis toward the outside, and then remove the upper housing upwards.

[0028] Several points need to be clarified: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and the relative positional relationships may change when the absolute position of the described objects changes. Second, in this document, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0029] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A high-speed train bogie axle box with self-lubricating function, comprising a split axle box structure connected to the bogie, characterized in that, The axle box structure is divided into an upper box (1) and a lower box (2). The upper box (1) and the lower box (2) are provided with bearing holes (3) at their centers. A positioning guide mechanism is provided between the upper box (1) and the lower box (2). The positioning guide mechanism includes a first positioning block (21) on the top of the lower box (2) and a second positioning block (11) on the bottom of the upper box (1). A sealing structure (7) is provided on the contact surface between the upper box (1) and the lower box (2). A self-lubricating composite liner (8) is integrated at the bottom of the lower box (2) and abuts against the support rail. An inclined spring seat (23) is provided on the lower box (2). A multi-stage air spring assembly (4) and a hydraulic damper are provided between the spring seat (23) and the bogie.

2. A high-speed train bogie axle box with self-lubricating function according to claim 1, characterized in that, The upper box (1) and the lower box (2) are fixedly connected by high-precision positioning pins and bolts, and the two ends of the axle box structure are respectively provided with a front end cover (5) and a rear end cover (6).

3. A high-speed train bogie axle box with self-lubricating function according to claim 2, characterized in that, The rear end cover (6) is located on the side close to the train wheelset. The top of the lower box (2) on the side close to the rear end cover (6) is provided with a first positioning block (21) in a triangular structure, and the bottom of the upper box (1) is provided with a second positioning block (11) that matches and is installed with the first positioning block (21).

4. A high-speed train bogie axle box with self-lubricating function according to claim 3, characterized in that, The bottom of the second positioning block (11) is provided with a third positioning block (12), and the top of the lower box (2) is provided with a positioning groove (22) located on the side of the first positioning block (21). The positioning groove (22) is located below the second positioning block (11) and is matched and installed with the third positioning block (12). The length of the positioning groove (22) is greater than the length of the third positioning block (12), and the slope of the inclined side of the trapezoidal structure of the third positioning block (12) and the positioning groove (22) is the same.

5. A high-speed train bogie axle box with self-lubricating function according to claim 4, characterized in that, The third positioning block (12) includes a trapezoidal slider (121) and a fixing block (122) disposed on the side of the trapezoidal slider (121) close to the first positioning block (21). The positioning groove (22) is provided with a trapezoidal slide groove (221) and a fixing groove (222) corresponding to the fixing block (122).

6. A high-speed train bogie axle box with self-lubricating function according to claim 1, characterized in that, The sealing structure (7) includes a silicone layer disposed on the contact surface between the upper housing (1) and the lower housing (2) and a sealing ring disposed between the two sets of silicone layers.

7. A high-speed train bogie axle box with self-lubricating function according to claim 1, characterized in that, The self-lubricating composite liner (8) is made of graphene-reinforced polytetrafluoroethylene material.

8. A high-speed train bogie axle box with self-lubricating function according to claim 1, characterized in that, Temperature sensors and vibration acceleration sensors are embedded in the outer ring sidewall of the bearing hole (3) of the lower housing (2).

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