A new type of multi-stage pantograph specially designed for working height of rigid catenary

Abstract

The application discloses a novel multi-stage pantograph specially designed for working height of rigid catenary, which comprises a chassis, an air bag pantograph lifting device, a frame structure and a pantograph head structure, the frame structure comprises a lower arm rod, an upper arm rod, a lower pull rod and an elbow joint shaft installed at the lower part of the bottom end of the upper arm rod, the lower arm rod and the lower pull rod are hingedly connected with the elbow joint shaft and the bottom end of the upper arm rod respectively, the upper end of the lower arm rod and the lower pull rod are connected with the air bag pantograph lifting device and the chassis respectively, the inside of the upper arm rod is provided with a pneumatic transmission device and an upper pull rod, and the top end of the upper pull rod is hingedly connected with a connecting device; the two ends of the connecting device are connected with the upper pull rod and the pantograph head structure respectively, the pneumatic transmission device drives the pull rod to rotate the connecting device around the hinge point, so that the pantograph head structure is lifted. The pantograph lifting mode is safe and reliable, can effectively improve the low working height of the pantograph when the pantograph operates in the rigid catenary section and is in an abnormal working state, can prolong the service life of the pantograph and improve the safety.

Description

Technical Field

[0001] This invention relates to a novel multi-stage pantograph specifically designed for the working height of rigid contact wires, belonging to the field of pantograph technology for electric vehicles. Background Technology

[0002] A pantograph is a current-collecting device used by electric locomotives to draw current from the contact wire of an overhead contact line. Stable contact between the pantograph and the contact line is a crucial prerequisite for the safe and stable operation of electrified railways. The working height of the pantograph affects its dynamics and strength performance, thus impacting current collection and service life.

[0003] While rigid contact wire systems are widely used in subway lines, flexible contact wire systems are often partially incorporated due to various limitations. Rigid contact wire systems can account for over 80% of the overall line. Currently, urban rail vehicle pantographs are designed based on main lines and flexible contact wires. In China, the pantograph height of Type A subway vehicles is between 3810mm and 3890mm when lowered. When the vehicle operates in a flexible contact wire section, the pantograph is at its normal operating height of 5300mm, with a lifting height of approximately 1500mm. However, when the pantograph operates in a rigid contact wire section, its operating height is typically 4040mm, with a lifting height of only about 300mm. Since rigid contact wires account for over 80% of the entire line, the normal pantograph lifting height is between 1400mm and 2000mm. Prolonged operation under conditions of low pantograph lifting height with a rigid contact wire will affect the service life of the pantograph components, leading to irreversible damage and, in severe cases, even destruction of the entire pantograph-contact wire system.

[0004] Although the pantograph based on the improved design of the main line and flexible network can meet the requirements of pantographs in urban rail vehicles in rigid contact network sections, the low working height of the rigid contact network will cause the pantograph to be at an abnormal working height, which will affect the current collection quality between the pantograph and the contact network and the service life of the pantograph. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the present invention aims to provide a novel multi-stage pantograph specifically designed for the working height of rigid contact wires.

[0006] The technical solution provided by this invention to solve the above-mentioned technical problems is: a novel multi-stage pantograph specifically designed for the working height of rigid contact wires, comprising a base frame, an airbag lifting device mounted on the base frame, a frame structure, and a pantograph head structure. The frame structure includes a lower arm, an upper arm, a pull rod, and an elbow joint shaft mounted on the lower part of the lower end of the upper arm. The upper ends of the lower arm and the pull rod are respectively hinged to the elbow joint shaft and the lower end of the upper arm, respectively, and their lower ends are respectively connected to the airbag lifting device and the base frame. The upper arm has a pneumatic transmission device and an upper pull rod inside, and a connecting device is hinged to the top end. The two ends of the connecting device are respectively connected to the upper pull rod and the pantograph head structure. The pneumatic transmission device drives the upper pull rod to rotate the connecting device around the hinge point, thereby realizing the raising and lowering of the pantograph head structure.

[0007] A further technical solution is that the connecting device includes a connecting frame and a hinge rod, the bottom end of the hinge rod is fixed on the connecting frame, the pull rod is hinged to the top end of the hinge rod, and the top end of the upper arm is hinged to the middle part of the hinge rod.

[0008] A further technical solution is that the bow head structure includes a balance arm, a bow head frame, a sliding plate, and a bow head suspension spring box. The two ends of the balance arm are respectively connected to two bow head frames, and the two ends of the sliding plate are respectively connected to the two bow head frames through the bow head suspension spring box. The connecting frame is connected to the balance arm.

[0009] A further technical solution is that the connecting device is connected to the middle of the balance arm.

[0010] A further technical solution is that there are two skateboards, distributed at both ends of the bow head frame.

[0011] A further technical solution is that the balance arm is connected to the middle of the bow head frame.

[0012] A further technical solution is that the frame structure is provided with a balancing structure, one end of which is connected to the bow head structure.

[0013] A further technical solution is that the balancing structure includes a balancing frame and a balancing bar. The balancing frame is fixed on the elbow joint axis, and one end of the balancing bar is hinged to the bow head frame, while the other end passes through the balancing frame and extends outside the balancing frame.

[0014] This invention offers the following advantages: It solves the problems of poor pantograph performance and high failure rate when the pantograph operates at the working height of a rigid contact network for extended periods, while also meeting the working height requirements of a flexible contact network. When the pantograph operates in a rigid contact network section, it is in the lowered position. The pantograph head is raised by rotating the connecting device around the hinge point via a pneumatic transmission device inside the upper arm, while the frame remains stationary. When the pantograph operates in a flexible contact network section, the pantograph head is raised by rotating the pantograph frame structure around the hinge point of the base frame via a torsion spring. Because the pantograph is in the lowered position in the rigid contact network section, there is no need to drive the frame structure, and in the flexible contact network section, the pantograph is at its normal operating height. Therefore, this invention effectively improves the pantograph's operating condition, ensuring it operates at its normal working height, thereby improving its dynamic performance and extending its service life.

[0015] The entire pantograph device has a simple structure and a safe and reliable pantograph raising method. It can effectively improve the situation where the pantograph is at a low working height and in an abnormal working state when operating in a rigid contact wire section, thereby increasing the service life of the pantograph and improving safety.

[0016] During operation, the balance bar ensures that the pantograph head remains level during ascent and contact with the overhead contact line, improving the pantograph's dynamic performance. The hydraulic tie rod device is installed inside the upper arm of the frame structure. The pneumatic transmission device drives the tie rod to raise the pantograph head, allowing the pantograph to make contact with the rigid overhead contact line when lowering. This effectively improves the problems of poor current collection quality and short service life caused by the low working height of the pantograph when operating in sections with rigid overhead contact lines. Attached Figure Description

[0017] Figure 1 A schematic diagram of a new pantograph structure designed to meet the working height requirements of different overhead contact line sections;

[0018] Figure 2 for Figure 1 Schematic diagram of the cylinder tie rod structure in the upper and middle boom;

[0019] Figure 3 for Figure 2 A schematic diagram showing the connection between the connecting device and other mechanisms;

[0020] Figure 4 This is a diagram showing the working status of the pantograph when it is operating in a rigid contact wire section.

[0021] Figure 5 This is a diagram showing the working status of the pantograph when it is operating in a section of the flexible overhead contact line.

[0022] Figure descriptions: 1. Base frame; 2. Airbag lifting device; 3. Frame structure; 4. Bow head structure; 5. Balancing structure; 6. Cylinder rod device; 7. Lower arm; 8. Upper arm; 9. Lower rod; 10. Connecting device; 11. Slide plate; 12. Bow head frame; 13. Balance arm; 14. Bow head suspension spring box; 15. Elbow joint shaft; 16. Balancing frame; 17. Balance bar; 18. Pneumatic transmission device; 19. Upper rod. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-3 As shown, the present invention discloses a novel multi-stage pantograph specifically designed for the working height of rigid contact networks, comprising a base frame 1, an airbag lifting device 2 mounted on the base frame 1, a frame structure 3, and a pantograph head structure 4. The frame structure 3 includes a lower arm 7, an upper arm 8, a pull rod 9, and an elbow joint shaft 15 mounted on the lower part of the bottom end of the upper arm 8. The upper ends of the lower arm 7 and the pull rod 9 are respectively hinged to the elbow joint shaft 15 and the bottom end of the upper arm 8, and the lower ends are respectively connected to the airbag lifting device 2 and the base frame 1. The driving airbag lifting device 2 can drive the lower arm 7 to rotate, and the upper arm 8 is provided with a cylinder pull rod device 6 inside.

[0025] The cylinder rod device 6 includes a pneumatic transmission device 18 and an upper pull rod 19. One end of the upper pull rod 19 extends outside the upper arm rod 8, and the other end is connected to the pneumatic transmission device 18. The pneumatic transmission device 18 drives the upper pull rod 19 to perform telescopic movements. A connecting device 10 is hinged to the top of the upper arm rod 8. The two ends of the connecting device 10 are respectively connected to the upper pull rod 19 and the bow head structure 4. The pneumatic transmission device 18 drives the upper pull rod 19 to make the connecting device 10 rotate around the hinge point, thereby realizing the raising and lowering of the bow head structure 4.

[0026] The working process in the embodiment is as follows:

[0027] like Figure 4 As shown, when the pantograph is working in a rigid contact wire section, the pantograph is in the lowered position.

[0028] The pneumatic transmission device 18 is activated, which drives the upper pull rod 19 to drive the connecting device 10 to rotate around the hinge point, thereby raising the bow head structure 4 to the working height of the rigid contact wire section.

[0029] like Figure 5As shown, when the pantograph is working in the flexible contact wire section, the pneumatic transmission device 18 returns to the initial state, so that the pantograph head structure 4 returns to the initial state.

[0030] Then, the airbag lifting device 2 is activated to drive the lower arm 7 to rotate, causing the frame structure 3 to rise, thereby raising the bow head structure 4.

[0031] Furthermore, such as Figure 2 and Figure 3 As shown, in this embodiment, the connecting device 10 includes a connecting frame and a hinge rod. The bottom end of the hinge rod is fixed on the connecting frame, the upper pull rod 19 is hinged to the top end of the hinge rod, and the top end of the upper arm rod 8 is hinged to the middle part of the hinge rod. The connecting frame and the hinge rod have a certain angle between them. When the upper pull rod 19 pushes the hinge rod to rotate, it can drive the connecting frame to move up or down, thereby realizing the raising or lowering of the bow head structure 4.

[0032] Furthermore, such as Figure 1 As shown, in this embodiment, one specific implementation of the bow head structure 4 is as follows: the bow head structure 4 includes a balance arm 13, two bow head frames 12, two slide plates 11, and four bow head suspension spring boxes 14. The two ends of the balance arm 13 are respectively connected to the two bow head frames 12, and the two ends of the slide plates 11 are respectively connected to the two bow head frames 12 through the bow head suspension spring boxes 14. The connecting frame is connected to the middle part of the balance arm 13, wherein the connecting frame drives the balance arm 13 to rise and fall, thereby realizing the rise and fall of the bow head structure 4.

[0033] Furthermore, such as Figure 1 As shown in this embodiment, in order to ensure that the slide plate 11 remains horizontal during the ascent of the bow head structure 4 and during contact with the contact wire, the preferred embodiment is that the frame structure 3 is provided with a balancing structure 5. One end of the balancing structure 5 is connected to the bow head structure 4. The balancing structure 5 includes a balancing frame 16 and a balancing rod 17. The balancing frame 16 is fixed on the elbow joint shaft 15. One end of the balancing rod 17 is hinged to the bow head frame 12, and the other end passes through the balancing frame 16 and extends outside the balancing frame 16. A blocking member can be provided on the end of the balancing rod 17 that passes through the balancing frame 16 to prevent the balancing rod 17 from falling off.

[0034] The above description is not intended to limit the present invention in any way. Although the present invention has been disclosed through the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the scope of the present invention.

Claims

1. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires, comprising a base frame (1), an airbag lifting device (2) mounted on the base frame (1), a frame structure (3), and a pantograph head structure (4), wherein the frame structure (3) comprises a lower arm (7), an upper arm (8), a pull rod (9), and an elbow joint shaft (15) mounted on the lower part of the bottom end of the upper arm (8), wherein the upper ends of the lower arm (7) and the pull rod (9) are respectively hinged to the elbow joint shaft (15) and the bottom end of the upper arm (8), and the lower ends are respectively connected to the airbag lifting device (2) and the base frame (1), characterized in that, The upper arm (8) is equipped with a pneumatic transmission device (18) and a pull rod (19) inside, and a connecting device (10) is hinged at the top. The two ends of the connecting device (10) are connected to the upper pull rod (19) and the bow head structure (4) respectively. The pneumatic transmission device (18) drives the upper pull rod (19) to make the connecting device (10) rotate around the hinge point, thereby realizing the lifting and lowering of the bow head structure (4).

2. The novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 1, characterized in that, The connecting device (10) includes a connecting frame and a hinge rod. The bottom end of the hinge rod is fixed on the connecting frame. The upper pull rod (19) is hinged to the top end of the hinge rod. The top end of the upper arm rod (8) is hinged to the middle part of the hinge rod.

3. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 2, characterized in that, The bow head structure (4) includes a balance arm (13), a bow head frame (12), a slide plate (11), and a bow head suspension spring box (14). The two ends of the balance arm (13) are respectively connected to the two bow head frames (12), and the two ends of the slide plate (11) are respectively connected to the two bow head frames (12) through the bow head suspension spring box (14). The connecting frame is connected to the balance arm (13).

4. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 3, characterized in that, The connecting device (10) is connected to the middle of the balance arm (13).

5. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 3, characterized in that, There are two skateboards (11), which are distributed at both ends of the bow head frame (12).

6. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 3, characterized in that, The balance arm (13) is connected to the middle of the bow head frame (12).

7. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 3, characterized in that, The frame structure (3) is provided with a balancing structure (5), one end of which is connected to the bow head structure (4).

8. A novel multi-stage pantograph specifically designed for the working height of rigid contact wires according to claim 7, characterized in that, The balancing structure (5) includes a balancing frame (16) and a balancing bar (17). The balancing frame (16) is fixed on the elbow joint axis (15). One end of the balancing bar (17) is hinged to the bow head frame (12), and the other end passes through the balancing frame (16) and extends outside the balancing frame (16).

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