Buffer for sky rail
By combining sliding bolts with movable supports, upper slider assembly, and spring assembly, the space and stability issues of the monorail vehicle buffer under light load conditions are solved, achieving a compact and lightweight buffering effect, and improving the running smoothness of the monorail vehicle and the passenger experience.
Patent Information
- Application Number
- CN202423036915.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing buffer designs are mainly designed for heavy-load conditions, are large in size and unsuitable for the light-load requirements of monorail vehicles. There is a lack of buffers specifically optimized for light-load applications, which leads to unstable operation of monorail vehicles under low-load conditions.
The system employs a sliding bolt in conjunction with a movable support, an upper slider assembly, a lower slider, and a pre-compressed spring assembly. Buffering is achieved through sliding displacement and spring assembly compression deformation, reducing space occupancy. Rotation is restricted by threaded connections and elastic cylindrical pins, improving stability.
It effectively reduces the space occupied by the buffer, improves the response speed to impact forces, enhances the running stability and passenger comfort of the monorail vehicle, simplifies the maintenance process, and reduces maintenance costs.
Smart Images
Figure CN223508269U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of monorail vehicle technology, and in particular to a buffer for monorail. Background Technology
[0002] In the field of rail transit, especially in the operation of monorail vehicles, buffers play a crucial role. Buffers are primarily used to mitigate longitudinal impacts and vibrations caused by changes in traction force or collisions during starting, braking, and shunting operations. By dissipating the impact and vibration energy between vehicles, buffers reduce potential damage to the car body structure and loaded cargo, and improve the smoothness of train operation.
[0003] Traditionally, shock absorbers rely on compressing elastic elements to mitigate impact forces, while also utilizing mechanisms such as metal friction and hydraulic damping to absorb impact energy. Based on their working principles, shock absorbers can be categorized into various types, such as spring-type, friction-type, rubber-type, friction-rubber-type, hydraulic, and air-type shock absorbers. Different models of shock absorbers exist in the domestic and international markets. For example, domestically, there are MX-1 rubber shock absorbers, MT-2 type shock absorbers, and MT-3 type shock absorbers; internationally, chain hook systems are equipped with side shock absorbers of different capacities; and the North American AAR system uses MARK-50 and MARK-70 type shock absorbers.
[0004] However, most existing buffer designs are primarily designed for heavy-load conditions, resulting in large sizes and high capacities, making them unsuitable for monorail vehicles operating under low-load conditions. For monorail vehicles, a new type of buffer is needed that is small in size, lightweight, and has a buffer capacity adapted to their operating conditions. The current market lacks products specifically optimized for these light-load applications, which constitutes a bottleneck in monorail vehicle connection technology.
[0005] Therefore, in order to meet the needs of monorail vehicles, it is necessary to develop a new type of shock absorber that not only has a compact structure and lightweight characteristics, but also can effectively handle the impact under both tensile and compressive conditions to ensure the safety and ride comfort of monorail vehicles. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a buffer for an empty track. It uses sliding bolts to form sliding displacement, which reduces the space ratio of the buffer. At the same time, through the cooperation of the sliding bolts with the movable support, the upper slider assembly, the lower slider and the pre-compressed spring assembly, the buffer can be achieved by the compression deformation of the spring assembly when subjected to tensile load or compressive load.
[0007] To achieve the above objectives, this utility model provides a buffer for empty tracks, comprising:
[0008] The cylinder has an end cap at one end and a fixed support at the other end.
[0009] Furthermore, a first sliding through hole is provided in the center of the end cap, and one side of the end cap is the movable end of the buffer, from which the load is applied;
[0010] The movable support passes through the end cap at its center and slides within the first sliding through hole;
[0011] The upper slider assembly is disposed inside the cylinder near one end of the end cap and slides along the inner wall of the cylinder;
[0012] The lower slider is located inside the cylinder at one end near the fixed support, and a second sliding through hole is provided in its center.
[0013] A sliding bolt passes through the lower slider and the upper slider assembly in sequence to connect to the movable support. The bolt head of the sliding bolt is configured to slide in the second sliding through hole.
[0014] A spring assembly is disposed between the upper slider group and the lower slider group. In the initial state, the spring assembly is in a pre-compressed state to push the upper slider group against the inner wall of the end cap and push the lower slider against the inner wall of the fixed support. When the buffer is subjected to load and stretched or compressed, the spring assembly undergoes compression deformation, thereby achieving buffering.
[0015] Further, the upper slider assembly includes:
[0016] The first upper slider is disposed inside the cylinder near the end cap, and the first upper slider slides along the inner wall of the cylinder;
[0017] The second upper slider is nested inside the first upper slider and slides along the inner wall of the first upper slider.
[0018] Further, the spring assembly includes:
[0019] An inner spring, the upper end of which is sleeved on the second upper slider and the lower end of which abuts against the lower slider;
[0020] An outer spring, the upper end of which abuts against the first upper slider and the lower end of which abuts against the lower slider.
[0021] Furthermore, it also includes:
[0022] The first bushing is disposed between the first upper slider and the cylinder;
[0023] The second bushing is disposed between the second upper slider and the first upper slider;
[0024] Two sets of third bushings, one set is disposed between the sliding bolt and the second upper slider, and the other set is disposed between the sliding bolt and the lower slider.
[0025] Furthermore, the first bushing, the second bushing, and the third bushing are all made of nylon.
[0026] Furthermore, the movable support and the sliding bolt are threaded together, and an elastic cylindrical pin is fitted between them to restrict the relative rotation between them.
[0027] Furthermore, the end cap and the fixed support are respectively connected to the cylinder body by bolts.
[0028] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:
[0029] (1) This utility model uses the cooperation of sliding bolts with movable support, upper slider group, lower slider and pre-compressed spring assembly to achieve buffering by compression deformation of spring assembly when subjected to tensile load or compressive load. The sliding bolt forms sliding displacement, which greatly reduces the space ratio of the buffer and is suitable for use in space-limited air rail vehicles.
[0030] (2) This utility model uses a threaded connection between a movable support and a sliding bolt, and is equipped with an elastic cylindrical pin to limit the relative rotation between the two, which increases the stability of the system and reduces the wear and failure risk caused by the relative movement between the components.
[0031] (3) The present invention uses inner and outer double springs to make it react quickly under different load conditions, which improves the response speed of the buffer to changes in impact force, thereby better protecting the vehicle and passengers.
[0032] (4) The fixed support of this utility model is connected to the cylinder by bolts, which facilitates disassembly and assembly, simplifies the maintenance process, and reduces maintenance costs.
[0033] In summary, the buffer for empty rail proposed in this utility model represents a significant technological advancement, filling the current market gap of lacking space-optimized buffers specifically designed for light-load applications. It can effectively reduce longitudinal impacts and vibrations caused by changes in traction force or collisions during train operation, such as starting, braking, and shunting, thereby improving the stability of train operation and enhancing the passenger experience. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the structure of the buffer for empty tracks provided in this embodiment of the utility model;
[0035] Figure 2This is a cross-sectional schematic diagram of the buffer for empty tracks provided in an embodiment of this utility model;
[0036] Labeling explanation: 1. Movable support; 2. End cap; 3. Cylinder body; 4. First bushing; 5. Second bushing; 6. First upper slider; 7. Second upper slider; 8. Third bushing; 9. Inner spring; 10. Outer spring; 11. Sliding bolt; 12. Lower slider; 13. Fixed support. Detailed Implementation
[0037] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "horizontal," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a buffer for empty tracks, including:
[0041] The cylinder 3 has an end cap 2 at one end and a fixed support 13 at the other end.
[0042] Furthermore, a first sliding through hole is provided in the center of the end cap 2, and the movable end of the buffer is located on one side of the end cap 2, from which the load is applied;
[0043] The movable support 1 has a central through-end cap 2 and slides in the first sliding through-hole;
[0044] The upper slider assembly is located inside the cylinder 3 near one end of the end cap 2 and slides along the inner wall of the cylinder 3;
[0045] The lower slider 12 is located inside the cylinder 3 at one end near the fixed support 13, and a second sliding through hole is provided in its center.
[0046] The sliding bolt 11 passes through the lower slider 12 and the upper slider group in sequence to connect to the movable support 1. The bolt head of the sliding bolt 11 is configured to slide in the second sliding through hole.
[0047] The spring assembly is disposed between the upper slider group and the lower slider 12. In the initial state, the spring assembly is in a pre-compressed state to push the upper slider group against the inner wall of the end cover 2 and push the lower slider 12 against the inner wall of the fixed support 13. When the buffer is stretched or compressed under load, the spring assembly is compressed and deformed, thereby achieving buffering.
[0048] Specifically, the upper slider group includes:
[0049] The first upper slider 6 is located inside the cylinder 3 near the end cap 2, and the first upper slider 6 slides along the inner wall of the cylinder 3;
[0050] The second upper slider 7 is nested inside the first upper slider 6 and slides along the inner wall of the first upper slider 6.
[0051] Specifically, the spring assembly includes:
[0052] The inner spring 9 has its upper end sleeved on the second upper slider 7 and its lower end abutting against the lower slider 12.
[0053] The outer spring 10 has its upper end abutting against the first upper slider 6 and its lower end abutting against the lower slider 12.
[0054] Furthermore, the buffer for the empty track also includes:
[0055] The first bushing 4 is disposed between the first upper slider 6 and the cylinder 3;
[0056] The second bushing 5 is disposed between the second upper slider 7 and the first upper slider 6;
[0057] Two sets of third bushings 8 are provided, one set between the sliding bolt 11 and the second upper slider 7, and the other set between the sliding bolt 11 and the lower slider 12. The arrangement of the first bushing 4, the second bushing 5 and the third bushing 8 can effectively reduce the frictional resistance of relative motion, increase the reliability of the buffer, and avoid jamming during use.
[0058] Preferably, the first bushing 4, the second bushing 5, and the third bushing 8 are all made of nylon.
[0059] Optionally, the movable support 1 and the sliding bolt 11 are threaded together, and a flexible cylindrical pin is fitted between them to limit the relative rotation between them.
[0060] Furthermore, the end cap 2 and the fixed support 13 are respectively connected to the cylinder 3 by bolts.
[0061] When the buffer is subjected to a compressive load, if the load is exactly along the axial direction, the movable support 1 drives the second upper slider 7 to move, and at the same time compresses the inner spring 9, thereby achieving the effect of compression buffering. When the bolt head of the sliding bolt 11 presses against the fixed support 13, the compression stroke limit is reached. In actual operation, the compressive load in some working conditions is not completely along the axial direction. In this case, the movable support 1 drives the second upper slider 7 and the first upper slider 6 to move, and at the same time compresses the inner spring 9 and the outer spring 10, thereby achieving the effect of compression buffering. When the bolt head of the sliding bolt 11 presses against the fixed support 13, the compression stroke limit is reached.
[0062] When the buffer is subjected to tensile load, the movable support 1 drives the sliding bolt 11, and the sliding bolt 11 drives the lower slider 12 to move upward. The lower slider 12 compresses the inner spring 9 and the outer spring 10 at the same time, thereby achieving the effect of tensile buffering. When the lower slider 12 contacts the second upper slider 7, the tensile stroke limit is reached.
[0063] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A buffer for empty tracks, characterized in that, include: The cylinder (3) has an end cap (2) at one end and a fixed support (13) at the other end. Furthermore, a first sliding through hole is provided in the center of the end cap (2), and one side of the end cap (2) is the movable end of the buffer, from which the load is applied; The movable support (1) passes through the end cap (2) and slides in the first sliding through hole; The upper slider assembly is located inside the cylinder (3) at one end near the end cap (2) and slides along the inner wall of the cylinder (3); The sliding block (12) is located inside the cylinder (3) at one end near the fixed support (13), and a second sliding through hole is provided at its center; A sliding bolt (11) passes through the lower slider (12) and the upper slider assembly in sequence to connect to the movable support (1). The bolt head of the sliding bolt (11) is configured to slide in the second sliding through hole. A spring assembly is disposed between the upper slider group and the lower slider (12). In the initial state, the spring assembly is in a pre-compressed state to push the upper slider group against the inner wall of the end cap (2) and push the lower slider (12) against the inner wall of the fixed support (13). When the buffer is stretched or compressed under load, the spring assembly is compressed and deformed, thereby achieving buffering.
2. The buffer for empty tracks according to claim 1, characterized in that, The upper slider assembly includes: The first upper slider (6) is disposed inside the cylinder (3) at one end near the end cap (2), and the first upper slider (6) slides along the inner wall of the cylinder (3); The second upper slider (7) is nested inside the first upper slider (6) and slides along the inner wall of the first upper slider (6).
3. The buffer for empty tracks according to claim 2, characterized in that, The spring assembly includes: The inner spring (9) has its upper end sleeved on the second upper slider (7) and its lower end abutting against the lower slider (12); The outer spring (10) has its upper end abutting against the first upper slider (6) and its lower end abutting against the lower slider (12).
4. The buffer for empty tracks according to claim 3, characterized in that, Also includes: The first bushing (4) is disposed between the first upper slider (6) and the cylinder (3); The second bushing (5) is disposed between the second upper slider (7) and the first upper slider (6); Two sets of third bushings (8), one set is disposed between the sliding bolt (11) and the second upper slider (7), and the other set is disposed between the sliding bolt (11) and the lower slider (12).
5. The buffer for empty tracks according to claim 4, characterized in that, The first bushing (4), the second bushing (5) and the third bushing (8) are all made of nylon.
6. The buffer for empty tracks according to claim 3, characterized in that, The movable support (1) is threadedly connected to the sliding bolt (11), and an elastic cylindrical pin is fitted between them to restrict the relative rotation between them.
7. The buffer for empty tracks according to claim 3, characterized in that, The end cap (2) and the fixed support (13) are respectively connected to the cylinder (3) by bolts.