Bogie of straddle-type monorail vehicle
Patent Information
- Application Number
- CN202522431053.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-17
AI Technical Summary
[0003]针对背景技术的问题，本实用新型提供一种跨座式单轨车辆的转向架，以解决现有技术中转向架结构复杂、走行轮胎磨耗严重、车辆维护成本高和影响列车乘坐舒适度的问题
首先，通过心盘结构连接车体与转向架，且整个转向架的竖向中心线和心盘回转中心线重合且与走行轮回转中心线相交，这种结构形式消除了转向架中心与走行轮回转中心的距离差，也就消除了动力传递过程中的附加力矩，同时，由于去掉了杆系结构，车体与转向架连接距离更短更直接，结构刚性大大提高，因此，当车辆加速或制动时，其点头或仰头现象得到抑制，车辆行驶过程更平稳，驾乘舒适度明显提高。而且，采用心盘结构，内心盘能相对外心盘之间转动，当车辆过弯，特别是曲率半径较小的弯道时，转向架能灵活地围绕心盘轴心线转动，其回转半径小，回转范围大，减少了走行轮横向滑移，降低了走行轮的磨损率，同时导向轮7（见附图3）特别是位于弯道内侧的导向轮压力降低，减少了导向轮的磨损，大大提高了走行轮和导向轮的使用寿命（现有技术中，走行轮和导向轮都是非常易磨损、更换频率高的零部件）。
Smart Images
Figure CN224868410U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit vehicle manufacturing technology, and in particular to a bogie for a straddle-type monorail vehicle. Background Technology
[0002] In existing technology, the bogies of straddle-type monorail vehicles typically employ a connecting rod system structure. The train body is connected to the bogie via this connecting rod system, and traction and braking forces are transmitted between the train and the running wheels through this system. The following problems have been found in the use of this type of bogie: During the starting, acceleration and deceleration of a train, the bogies are prone to pitching and tilting, which can affect the comfort of the passengers. The running wheels wear out quickly and have a short lifespan, resulting in high vehicle maintenance costs. The structural framework is asymmetrical, resulting in uneven stress distribution. The bogie is large in size and weight, has high manufacturing costs, complex connecting rod structure, many parts, poor parts interchangeability, high maintenance costs, and poor rigidity due to its connecting rod structure. Utility Model Content
[0003] In view of the problems in the prior art, this utility model provides a bogie for a straddle-type monorail vehicle to solve the problems of complex bogie structure, severe tire wear, high vehicle maintenance costs, and impact on train ride comfort in the prior art.
[0004] To achieve the purpose of this utility model, a bogie for a straddle-type monorail vehicle is provided. Its innovation lies in: comprising a center plate, a bolster, a secondary suspension, a frame, running wheels, and a drive unit; the bolster is horizontally arranged; the drive unit is fixedly mounted on the frame; the center plate includes an inner center plate and an outer center plate, one of which is connected to the bottom of the vehicle body, and the other is fixedly connected to the bolster; the rotation axes of the inner and outer center plates coincide, and the rotation axis is vertically arranged; the inner center plate and... The outer core plate is movably connected, and the inner core plate can rotate along the rotation axis through the movable connection. The core plate can bear radial and axial loads. The frame is located below the bolster, and the bolster and the frame are connected by a secondary suspension. The secondary suspension includes four damping units, which are rectangularly distributed in four directions (front, rear, left, and right) with the rotation axis as the center. The running wheels are located inside the frame and are mounted on the output shaft of the drive device. The rotation axis of the running wheels intersects with the rotation axis of the core plate. Each damping unit includes a guide post, a guide hole, and an elastic element; the upper end of the guide post is fixedly connected to the bolster, and the guide hole is set on the frame, or the lower end of the guide post is fixedly connected to the frame, and the guide hole is set on the bolster; the guide post is fitted inside the guide hole, and the axial directions of both the guide post and the guide hole are vertical, and the outer diameter of the guide post matches the diameter of the guide hole; the elastic element is fitted on the guide post, the upper end of the elastic element contacts the lower side of the bolster, and the lower end of the elastic element contacts the upper side of the frame.
[0005] Furthermore, the bogies are arranged symmetrically about the center axis of rotation of the center plate.
[0006] Furthermore, the running wheel includes two wheels, which are symmetrically arranged about the center line of the rotation axis of the disc. There are two driving devices, and each wheel is driven by a driving device.
[0007] Furthermore, the center disc is a slewing bearing, the inner center disc is the inner ring of the slewing bearing, and the outer center disc is the outer ring of the slewing bearing.
[0008] Furthermore, the elastic element is a helical steel spring, an air spring, or a rubber spring. The principle of this utility model is as follows: Through observation and research, the inventors discovered that the reason why bogies tend to nod during train acceleration and tilt upwards during deceleration in existing technologies is mainly due to a distance A between the bogie center 1-1 and the running wheel rotation center 1-2, as shown in the attached figure. Figure 1 As shown, the distance A creates an additional torque between the two centers. In addition, the rigidity of the rod structure itself is poor. When the train accelerates (including positive and negative acceleration), it will experience nose-nodding or nose-up movement, which will cause the train to bounce up and down and affect the comfort of the train ride.
[0009] Furthermore, due to the distance difference between the bogie center and the rotation center of the running wheels, the running wheels will experience lateral slippage when the train curves, causing lateral sliding wear. Moreover, when the radius of curvature of the curve the train traverses is small, the wear on the two guide wheels located on the inner side of the curve will increase significantly (see appendix 1-3). Figure 1 The pressure increases the friction of the guide wheel, thus accelerating its wear.
[0010] On the other hand, as attached Figure 2As shown in the prior art, the drive unit 2-2 of the running wheel 2-1 is often located on one side of the bogie 2-3. In order to provide stable support rigidity, the bogie on the drive side is usually larger in size and weight than the non-drive side. Moreover, the non-drive side has reserved disassembly and assembly space 2-4 to facilitate the installation and replacement of the running wheel. Therefore, the bogie structure is an asymmetrical structure. This structure causes uneven lateral load on the running wheel, resulting in obvious lateral wear of the running wheel.
[0011] This utility model creatively adopts a secondary suspension structure with a center plate and guide column for shock absorption, which not only makes the bogie structure more compact and saves installation space, but also has the following effects: First, the car body and bogie are connected by a center plate structure, with the vertical centerline of the entire bogie coinciding with the center plate's rotation centerline and intersecting with the rotation centerline of the running wheels. This structure eliminates the distance difference between the bogie center and the running wheel rotation centerlines, thus eliminating additional torque during power transmission. Simultaneously, by eliminating the linkage structure, the connection distance between the car body and bogie is shorter and more direct, significantly improving structural rigidity. Therefore, when the vehicle accelerates or brakes, nose-diving or pitching phenomena are suppressed, resulting in a smoother ride and significantly improved ride comfort. Furthermore, the center plate structure allows the inner center plate to rotate relative to the outer center plate. When the vehicle corners, especially in curves with small radii of curvature, the bogie can flexibly rotate around the center plate axis, with a small radius of rotation and a large range of motion, reducing lateral slippage of the running wheels and lowering their wear rate. Meanwhile, the guide wheel 7 (see appendix)... Figure 3 In particular, the reduced pressure on the guide wheel located on the inside of the curve reduces wear on the guide wheel and greatly improves the service life of the running wheel and guide wheel (in the prior art, the running wheel and guide wheel are very easy to wear and have a high replacement frequency).
[0012] On the other hand, in existing technologies, train traction is achieved through a linkage structure, while damping is achieved through a secondary suspension. This structure is complex, requires a large layout space, and is heavy, resulting in high manufacturing and maintenance costs, hindering vehicle lightweighting, and leading to high energy consumption and operating costs. In this invention, the damping unit of the secondary suspension uses a structure with guide columns and guide holes, and an elastic element fitted around the guide column. This structure not only provides damping through the elastic element but also directly transmits the power from the drive unit to the train through the guide column. The damping and traction functions are combined into one through the secondary suspension, resulting in a more compact structure that occupies less space in the train installation area. It also significantly simplifies the structure, reduces the number of parts, and directly lowers manufacturing and maintenance costs. The simplified structure also contributes to vehicle lightweighting and reduced operating energy consumption. Furthermore, because the power transmission distance is shorter and there are fewer intermediate links, the power transmission efficiency is greatly improved, further achieving energy saving and efficiency enhancement.
[0013] As an optimized design, the bogie structure of this invention is symmetrically arranged around the rotation center of the center plate, resulting in a more even lateral load on the running wheels. This minimizes lateral wear on the running wheels, further extending their service life and reducing train operating costs. Simultaneously, the symmetrical structural design improves the manufacturability and versatility of components. The simplified structure also reduces the number of spare parts, further lowering manufacturing and operating costs.
[0014] As an optimization solution, the running wheel of this utility model adopts a combination of two wheels, with each wheel equipped with a drive device for driving. When the vehicle turns, the two drive devices can adjust their speeds separately, so that the two wheels run at different speeds. The speed of the wheel on the inside of the turn decreases, while the speed of the wheel on the outside increases. This can also greatly reduce the wear caused by longitudinal sliding of the running wheel, especially the inner wheel, thereby greatly reducing the uneven wear phenomenon of the running wheel and improving the service life of the running wheel. Therefore, the present invention has the following beneficial effects: the wear and uneven wear rate of the running wheels, guide wheels, etc., using the bogie of the present invention is greatly reduced, thereby improving their service life and reducing the cost of use; it significantly improves the pitching and tilting phenomena of the vehicle during driving, thereby improving the driving comfort; the bogie has a simple and compact structure, is lightweight, has good processability, and greatly reduces the manufacturing cost. Attached Figure Description
[0015] The accompanying drawings of this utility model are described below. Appendix Figure 1 This is a schematic diagram of the existing bogie 1 structure; Appendix Figure 2 This is a schematic diagram of the existing bogie 2 structure; Appendix Figure 3 This is a schematic diagram of the structure of this utility model; Appendix Figure 4 This is a schematic diagram of a shock-absorbing unit structure; Appendix Figure 5 This is a schematic diagram of the second shock-absorbing unit structure.
[0016] In the attached diagram: 1. Center plate; 2. Bolt; 3. Shock absorber; 4. Frame; 5. Running wheel; 6. Drive unit; 7. Guide wheel; 11. Inner center plate; 12. Outer center plate; 31. Guide column; 32. Elastic element; 1-1. Bogie center; 1-2. Running wheel rotation center; 1-3. Guide wheel; 2-1. Running wheel; 2-2. Drive unit; 2-3. Bogie; 2-4. Assembly / disassembly space. Detailed Implementation
[0017] The present invention will be further described below with reference to the embodiments.
[0018] As attached Figure 3The bogie of the straddle-type monorail vehicle shown includes a center plate 1, a bolster 2, a secondary suspension, a frame 4, running wheels 5, and a drive unit 6. The bolster 2 is horizontally positioned. The drive unit 6 is fixedly mounted on the frame. The center plate 1 includes an inner center plate 11 and an outer center plate 12. One of the inner center plate 11 and the outer center plate 12 is connected to the bottom of the vehicle body, and the other is fixedly connected to the bolster 2. For example, if the inner center plate 11 is connected to the bottom of the vehicle, then the outer center plate 12 is fixedly connected to the bolster 2; if the inner center plate 11 is fixedly connected to the bolster 2, then the outer center plate 12 is connected to the bottom of the vehicle. The rotation axis of the inner center plate 11 and the outer center plate 12 are aligned. The rotating axis is vertically oriented, with the inner core disk 11 and outer core disk 12 movably connected. The inner core disk 11 can rotate along the rotating axis via the movable connection, and the core disk 1 can bear radial and axial loads. The frame 4 is located below the rocker 2, and the rocker 2 and the frame 4 are connected by a secondary suspension system. The secondary suspension system includes four damping units 3, which are arranged in a rectangle with the rotating axis as the center in four directions: front, back, left, and right. The traveling wheel 5 is located inside the frame 4 and is mounted on the output shaft of the drive device 6. The rotating axis of the traveling wheel 5 intersects with the rotating axis of the core disk 1. Each damping unit 3 includes a guide post 31, a guide hole, and an elastic element 32; depending on the arrangement of the guide post 31 and the guide hole, the damping unit 3 can adopt two structural arrangements, one as shown in the attached figure. Figure 4 As shown, the upper end of the guide post 31 is fixedly connected to the bolster 2, and the guide hole is set on the frame 4, as shown in the attached figure. Figure 5 As shown, the lower end of the guide post 31 is fixedly connected to the frame 4, and the guide hole is set on the rocker 2; the guide post 31 is fitted into the guide hole, and the axial direction of both the guide post 31 and the guide hole is vertical, and the outer diameter of the guide post 31 matches the diameter of the guide hole; the elastic element 32 is fitted onto the guide post 31, the upper end of the elastic element 32 contacts the lower side of the rocker 2, and the lower end of the elastic element 32 contacts the upper side of the frame 4.
[0019] To ensure even force distribution on the running wheels and other wheel systems and reduce wear, the bogie is symmetrically arranged with the rotation axis of the center plate as the center.
[0020] In order to achieve differential driving and reduce uneven wear of the running wheels, the running wheels 5 include two wheels, which are symmetrically arranged on the left and right with the rotation axis of the center plate 1 as the center. The two wheels are driven by a drive device 6 respectively.
[0021] To improve the versatility of components and reduce the complexity of the manufacturing process, the core plate 1 can be directly adopted as a slewing bearing, with the inner core plate 11 being the inner ring of the slewing bearing and the outer core plate 12 being the outer ring of the slewing bearing. Alternatively, the core plate can be manufactured using conventional techniques.
[0022] The elastic element 32 is a helical steel spring, air spring, or rubber spring, etc. The elastic element has high adaptability and can reduce the procurement cost of spare parts.
Claims
1. A bogie for a straddle-type monorail vehicle, characterized in that: The system includes a center plate, a bolster, a secondary suspension, a frame, running wheels, and a drive unit. The bolster is horizontally positioned. The drive unit is fixedly mounted on the frame. The center plate comprises an inner center plate and an outer center plate, one of which is connected to the bottom of the vehicle body, and the other is fixedly connected to the bolster. The rotation axes of the inner and outer center plates coincide and are vertically aligned. The inner and outer center plates are movably connected, allowing the inner center plate to rotate along the rotation axis. The center plate can bear radial and axial loads. The frame is positioned below the bolster, and the bolster is connected to the frame via a secondary suspension. The secondary suspension includes four damping units arranged in a rectangle around the rotation axis in four directions: front, rear, left, and right. The running wheels are located within the frame and mounted on the output shaft of the drive unit. The rotation axis of the running wheels intersects with the rotation axis of the center plate. Each damping unit includes a guide post, a guide hole, and an elastic element; the upper end of the guide post is fixedly connected to the bolster, and the guide hole is set on the frame, or the lower end of the guide post is fixedly connected to the frame, and the guide hole is set on the bolster; the guide post is fitted inside the guide hole, and the axial directions of both the guide post and the guide hole are vertical, and the outer diameter of the guide post matches the diameter of the guide hole; the elastic element is fitted on the guide post, the upper end of the elastic element contacts the lower side of the bolster, and the lower end of the elastic element contacts the upper side of the frame.
2. The bogie of the straddle-type monorail vehicle as described in claim 1, characterized in that: The bogies are symmetrically arranged with the rotation axis of the center plate as the center.
3. The bogie of a straddle-type monorail vehicle as described in claim 1 or 2, characterized in that: The traveling wheel includes two wheels, which are symmetrically arranged about the center line of the rotation axis of the central disc. There are two driving devices, and each wheel is driven by a driving device.
4. The bogie of a straddle-type monorail vehicle as described in claim 1 or 2, characterized in that: The center disc is a slewing bearing, the inner center disc is the inner ring of the slewing bearing, and the outer center disc is the outer ring of the slewing bearing.
5. The bogie of the straddle-type monorail vehicle as described in claim 3, characterized in that: The center disc is a slewing bearing, the inner center disc is the inner ring of the slewing bearing, and the outer center disc is the outer ring of the slewing bearing.
6. The bogie of a straddle-type monorail vehicle as described in claim 1 or 2, characterized in that: The elastic element is a helical steel spring, an air spring, or a rubber spring.