Micro-motion pantograph head

Abstract

The present invention discloses a micro-motion pantograph bow head, and relates to the technical field of electric vehicle pantographs. The present invention comprises a bow head bracket, a carbon slide assembly and a ram horn, wherein the bow head bracket comprises a skylight pipe and a balance seat installed at both ends of the skylight pipe, the ram horn is installed on the balance seat, and both ends of the carbon slide assembly are respectively installed on the balance seats at both ends of the skylight pipe through airbag springs, and a guide device is arranged between the carbon slide assembly and the balance seat, and the guide device limits the reciprocating motion of the carbon slide assembly along the axis direction of the airbag spring, and the guide device limits the expansion and contraction amplitude of the airbag spring. The present invention drives the carbon slide assembly to rise and fall slowly in a small range under the cooperation of the airbag spring and the guide device, absorbs the impact force of the contact network, reduces the recoil force of the carbon slide on the contact network, slows down the wear rate, and improves the tracking property and current receiving stability of the carbon slide.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle pantographs, in particular to a micro-motion pantograph head. Background Art

[0002] Urban rail vehicles, mainly subways, light rails or trams, rely on the pantograph on the roof to contact the contact network to supply power to the vehicle. The pantograph head is an important component of the pantograph. The pantograph head is the part of the pantograph that contacts the contact network. Its working conditions are harsh, and its performance directly determines the current collection quality and reliability of the pantograph.

[0003] The Chinese invention patent with the announcement number CN202399928U discloses a pantograph bow head, including a bow head seat, a bow head slide plate, a fixing rod and an elastic connector; the bow head seat is connected to the fixing rod through the elastic connector, and is fixed to the upper end of the upper frame of the pantograph through the fixing rod; the bow head slide plate is arranged on the top of the bow head seat. The above pantograph bow head simplifies the structure, so that the pantograph and the contact network can maintain a uniform contact pressure, but the bow head slide plate will generate a large inertial force when impacted by the contact network, and it is easy to rebound and impact the contact network. The bow head slide plate cannot quickly fit with the contact network, the current collection stability is poor, and it is easy to cause problems such as eccentric wear of the slide plate. Summary of the invention

[0004] The object of the present invention is to provide a micro-motion pantograph bow head in response to the problems of poor followability and current collection stability of the existing pantograph bow head. The carbon slide assembly is installed on the bow head bracket through an air bag spring, and a guide device for limiting the expansion and contraction direction and amplitude of the air bag spring is provided between the carbon slide assembly and the bow head bracket. The air bag spring has the characteristic of buffering expansion and contraction. Under the limiting action of the guide device, the air bag spring drives the carbon slide assembly to rise and fall slightly, absorbs the impact force of the contact network, and reduces the recoil force of the carbon slide on the contact network, slows down the wear rate, and improves the followability and current collection stability of the carbon slide.

[0005] The technical solution adopted by the present invention is as follows:

[0006] According to the micro-motion pantograph bow head disclosed in the present invention, it includes a bow head bracket, a carbon slide assembly and a ram horn, the bow head bracket includes a ceiling pipe and a balance seat installed at both ends of the ceiling pipe, the two ends of the carbon slide assembly are respectively installed on the balance seats at both ends of the ceiling pipe through air bag springs, a guide device is arranged between the carbon slide assembly and the balance seat, the guide device limits the carbon slide assembly to reciprocate along the axis direction of the air bag spring, and the guide device limits the expansion and contraction range of the air bag spring.

[0007] Due to the above settings, the cooperation of the airbag spring and the guide device can effectively control the carbon slide assembly to slowly and slightly descend when under pressure, absorb the impact force of the contact network, and slowly and slightly rise when the carbon slide assembly is off the network, reducing the impact force when the carbon slide assembly touches the network again, significantly improving the tracking and current-collecting stability of the carbon slide. In addition, the guide device limits the carbon slide assembly to move along the axis of the airbag spring, and the posture of the carbon slide assembly relative to the horizontal plane remains unchanged during the lifting process, avoiding changes in the windward area and wind resistance, which can further improve the current-collecting stability.

[0008] Furthermore, the balance seat symmetrically extends to both sides of the skylight pipe, and at least one carbon slide assembly is installed on each side of the skylight pipe; the carbon slide assembly is arranged in a direction parallel to the axis of the skylight pipe. Due to the above arrangement, the arrangement of the balance seat and the skylight pipe forms a roughly I-shaped bow head bracket, and the carbon slide assembly is symmetrically installed on both sides of the skylight pipe, optimizing the structure, making the airbag springs and other components at both ends of the carbon slide assembly balanced, and improving the overall structural stability.

[0009] Furthermore, the balance seats at both ends of the skylight pipe form a support surface for supporting the carbon slide assembly, and the support surface is parallel to the axis of the skylight pipe, and the support surface is perpendicular to the axis of the airbag spring. Due to the above arrangement, the carbon slide mounting platform always remains parallel to the horizontal plane when it is raised or lowered, and can quickly follow the contact network after buffering and lifting, achieving a lower offline rate.

[0010] Furthermore, spring brackets are symmetrically arranged on both sides of the carbon slide assembly, and the spring brackets are detachably connected to the corresponding airbag springs on the balance seat. The spring brackets are symmetrically fixed on both sides of the carbon slide assembly in the width direction. A carbon slide assembly is installed on the bow head bracket through at least four symmetrically arranged airbag springs. The independent airbag springs share the impact and vibration absorption of the contact network, reduce the working stress of the bow head bracket, and increase the service life.

[0011] Furthermore, the guide device includes a guide platform fixed on the balance seat and a sliding member connected to the carbon slide assembly, the guide platform is provided with a guide groove for engaging the sliding member, the guide groove guides the sliding member to reciprocate along the axis direction of the airbag spring; the end of the sliding member away from the carbon slide assembly is provided with a limit pin, the limit pin cooperates with the guide platform to limit the expansion and contraction range of the airbag spring. Due to the above arrangement, the independent guide device guides and limits, so that the carbon slide assembly has more stable micro-movement, and the service life of the airbag spring is extended.

[0012] Furthermore, elastic buffer pads are respectively arranged at the upper and lower ends of the guide platform, and the elastic buffer pad at the upper end of the guide platform abuts and cooperates with the carbon slide assembly at the end of the extension stroke of the airbag spring, and the elastic buffer pad at the lower end of the guide platform abuts and cooperates with the limit pin at the end of the contraction stroke of the airbag spring. Due to the above arrangement, the elastic buffer pad performs secondary buffering on the basis of the airbag spring, and the airbag spring superimposed on the elastic buffer pad can achieve an effect of close and distant contact between the carbon slide assembly and the contact network, so that the bow head can maintain flexibility for a long time even in a non-maintenance state, effectively reducing the wear of the carbon slide and the contact network.

[0013] Furthermore, the carbon slide assembly includes a carbon slide mounting platform and a carbon slide group, and the carbon slide group is detachably mounted on the carbon slide mounting platform.

[0014] Furthermore, the airbag spring includes a rigid spring and an airbag wrapped around the rigid spring, and the airbag is provided with a flow limiting hole for buffering expansion and contraction.

[0015] In summary, due to the adoption of the above-mentioned technical scheme, the beneficial effects of the present invention are: compared with the prior art, the present invention adopts a micro-adjustment scheme of an airbag spring combined with a guide device, which limits the carbon slide plate assembly to make a small buffering rise and fall in the plumb direction after being impacted by the contact network, has a good absorption effect on the impact force of the network line, can quickly restore to the following state, and fixes the lifting posture of the carbon slide plate assembly to reduce the influence of wind resistance changes, improve the current collection stability, and ensure that it has a low offline rate in terms of lift and tracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the micro-motion pantograph head of Embodiment 1 of the present invention;

[0017] Figure 2 is a schematic diagram of the assembly of the carbon slide plate assembly and the bow head bracket according to the first embodiment of the present invention;

[0018] Figure 3 1 is a front view of a micro-motion pantograph head according to embodiment 1 of the present invention;

[0019] Figure 4 The present invention Figure 3 A is an enlarged schematic diagram;

[0020] Figure 5 It is a right side view of the micro-motion pantograph head of Embodiment 1 of the present invention;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the balance seat in Example 1 of the present invention;

[0022] Figure 7 is a schematic diagram of the three-dimensional structure of a pantograph according to Embodiment 2 of the present invention;

[0023] Markings in the figure: 10-base; 30-bow head; 40-bow lowering device; 50-bow raising device; 60-bow head locking device; 210-upper arm; 220-lower arm; 230-balance rod; 240-coupling rod; 310-carbon slide plate group; 320-carbon slide plate mounting platform; 330-balance assembly; 340-ceiling pipe; 350-ram horn; 360-balance mounting plate; 370-lower arm mounting plate; 331-balance seat; 332-airbag spring; 333-guide platform; 334-elastic buffer pad; 335-guide groove; 336-sliding part; 337-limit pin; 338-spring bracket. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Example 1

[0027] Reference Figures 1 to 6 The micro-motion pantograph bow head disclosed in this embodiment is described, which includes a carbon slide assembly, a bow head bracket and a horn 350, wherein the horns 350 are symmetrically mounted on both ends of the bow head bracket in the length direction. The carbon slide assembly is mounted on the bow head bracket through an airbag spring 332, and a guide device is arranged between the carbon slide assembly and the bow head bracket. The guide device cooperates with the carbon slide assembly to limit the telescopic direction and telescopic range of the airbag spring 332, that is, the guide device limits the lifting direction and lifting height of the carbon slide assembly. Specifically, the micro-motion pantograph bow head is arranged as a modular structure, the horn 350 is fixed on the bow head bracket, and the spring structure of the bow head bracket is a carbon slide assembly. The smaller the mass of the spring structure, the higher the current receiving stability. In addition, the airbag spring 332 cooperates with the buffering lifting effect of the guide device, which can further improve the current receiving stability of the bow head.

[0028] Optionally, the bow head support includes a detachable ceiling pipe 340 and a balance seat 331, and two balance seats 331 are symmetrically installed at both ends of the ceiling pipe 340 in the axial direction. In the top view, the two horns 350 are respectively installed on the balance seats 331 at both ends of the ceiling pipe 340 along the extension direction of the axis of the ceiling pipe 340. Figure 2 and Figure 6As shown, the balance seat 331 includes a base connected to the ceiling pipe 340 and wings symmetrically arranged on both sides of the base, the two wings extend symmetrically to the two sides of the ceiling pipe 340 in a direction parallel to the radial direction of the ceiling pipe 340, and the wings of the balance seat 331 on the same side of the ceiling pipe 340 form a support surface for supporting the carbon slide assembly, and at least one carbon slide assembly is installed on both sides of the ceiling pipe 340. Among them, the support surface is parallel to the axis of the ceiling pipe 340, and the axis of the airbag spring 332 is perpendicular to the support surface. When the ceiling pipe 340 remains horizontal, the upper surface of the carbon slide assembly contacting the contact network is parallel to the horizontal plane, and the support surface drives the carbon slide to rise and fall in the direction of the plumb bob, and the carbon slide assembly maintains its posture during the micro-adjustment process; the carbon slide assembly is arranged in a direction parallel to the axis of the ceiling pipe 340 to avoid eccentric wear.

[0029] The guide device is installed between the carbon slide assembly and the balance seat 331. When the airbag spring 332 drives the carbon slide assembly to rise and fall, the guide device plays a role in limiting the lifting direction and the lifting amplitude. Optionally, the guide device includes a guide platform 333 and a sliding member 336, wherein the guide platform 333 and the balance seat 331 are preferably configured as an integrally formed structure, the guide platform 333 is provided with a guide groove 335, the sliding member 336 is inserted into the guide groove 335, the upper end of the sliding member 336 is fixedly connected to the carbon slide assembly, and the sliding member 336 slides along the guide groove 335 to limit the reciprocating motion of the carbon slide assembly along the axis direction of the airbag spring 332. Figure 4 As shown, when the carbon slide assembly is kept horizontal, the sliding member 336 cooperates with the guide platform 333 to guide the carbon slide assembly to rise and fall along the plumb bob direction. Optionally, a limit pin 337 is provided at the end of the sliding member 336 away from the carbon slide assembly, that is, a limit pin 337 is provided at the lower end of the sliding member 336. When the carbon slide assembly is pressed down, the airbag spring 332 enters a contraction stroke, and the upper end of the guide platform 333 abuts against the bottom of the carbon slide assembly. When the carbon slide assembly is off the grid, the airbag spring 332 enters a stretching stroke, and the lower end of the guide platform 333 abuts against the limit pin 337, so that the cooperation between the limit pin 337 and the guide platform 333 limits the extension and contraction range of the airbag spring 332.

[0030] In order to further improve the tracking performance and power supply stability, elastic buffer pads 334 are optionally installed at the upper and lower ends of the guide platform 333, respectively, and the elastic buffer pads 334 are used for deceleration and buffering at the end of the contraction stroke and the end of the extension stroke of the airbag spring 332. Specifically, at the end of the contraction stroke of the airbag spring 332, the carbon slide assembly is pressed down and is about to leave the grid, and the elastic buffer pad 334 at the lower end of the guide platform 333 and the limit pin 337 are abutted and matched at the end of the compression stroke of the airbag spring 332; at the end of the extension stroke of the airbag spring 332, the carbon slide assembly rises offline, and the elastic buffer pad 334 at the upper end of the guide platform 333 and the carbon slide assembly are abutted and matched at the end of the extension stroke of the airbag spring 332.

[0031] To facilitate the removal and replacement of the carbon slide, the carbon slide assembly optionally includes a carbon slide mounting platform 320 and a carbon slide group 310, wherein the carbon slide group 310 is detachably mounted on the carbon slide mounting platform 320. The spring brackets 338 are symmetrically arranged on both sides of the carbon slide mounting platform 320 in the width direction for connecting the airbag spring 332.

[0032] Optionally, the airbag spring 332 specifically includes a rigid spring and an airbag, the airbag is wrapped around the rigid spring, and the flow-limiting hole on the airbag limits the exhaust speed and intake speed of the air in the airbag, which has the characteristics of buffering and expansion. When the bow head is impacted, the rigid spring is compressed, and the exhaust volume of the air in the airbag is limited, so that when the rigid spring does not reach the balance point, the airbag will work to absorb most of the impact force; when the bow head is separated from the network line, the rigid spring is stretched, and the intake volume of the airbag is limited, so that when the rigid spring does not reach the balance point, the airbag will work to reduce the impact force of the bow head on the network line as much as possible.

[0033] Example 2

[0034] Reference Figure 7 The pantograph disclosed in this embodiment includes a base 10, a lifting arm, a bow head 30, a bow raising device 50 for providing power for raising the bow, and a bow lowering device 40 for providing power for lowering the bow, wherein the structure of the bow head 30 is the same as that of Example 1, the upper arm portion 210 of the lifting arm is connected to the bow head 30 ceiling pipe 340, the lower arm portion 220 of the lifting arm is connected to the base 10 through a central rotating shaft, and the bow raising device 50 and the bow lowering device 40 are installed between the base 10 and the central rotating shaft.

[0035] Specifically, the lifting arm includes an upper arm 210, a balance bar 230, a lower arm 220 and a coupling rod 240, wherein the lower arm, the upper arm 210, the coupling rod 240 and the base 10 form a lower plane four-bar linkage, and the upper arm, the ceiling pipe 340, the balance bar 230 and the lower arm 220 form an upper plane four-bar linkage, and the two linkages are linked to realize the lifting function of the lifting arm. The lower arm 220 includes a central rotating shaft, a lower arm and a roller assembly, the lower end of the lower arm is installed on the central rotating shaft, the upper end of the lower arm is connected to the lower end of the upper arm 210, and the two ends of the coupling rod 240 are respectively rotatably connected to the base 10 and the lower end of the upper arm 210, and the lower arm, the upper arm 210, the coupling rod 240 and the base 10 form a lower plane four-bar linkage. The upper arm 210 is T-shaped, including an upper arm, a connecting plate installed at the lower end of the upper arm, and a crossbar installed at the upper end of the upper arm. The upper arm and the crossbar are arranged in a T shape, wherein the crossbar is rotatably connected to the upper arm mounting plate 370 of the skylight pipe 340; the lower end of the balance bar 230 is rotatably connected to the upper end of the lower arm 220, and the upper end of the balance bar 230 is rotatably connected to the balance mounting plate 360 ​​of the skylight pipe 340. The upper arm, the bow head 30, the balance bar 230 and the lower arm 220 form an upper plane four-bar linkage. The balance bar 230 has an adjustable screw with an adjustable length, and the balance bar 230 ensures the horizontal state of the bow head 30 by adjusting the extension length of the adjusting screw.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-motion pantograph head, comprising a pantograph head bracket, a carbon slide assembly and a horn (350), characterized in that: The bow head bracket comprises a ceiling pipe (340) and a balance seat (331) installed at both ends of the ceiling pipe (340), the ram horn (350) is installed on the balance seat (331), and the two ends of the carbon slide assembly are respectively installed on the balance seats (331) at both ends of the ceiling pipe (340) through airbag springs (332), and a guide device is arranged between the carbon slide assembly and the balance seat (331), and the guide device limits the carbon slide assembly to reciprocate along the axis direction of the airbag spring (332), and the guide device limits the expansion and contraction range of the airbag spring (332); wherein the guide device comprises a guide platform (333) and a sliding member (336), the guide platform (333) is provided with a guide groove (335), the sliding member (336) is inserted into the guide groove (335), and the upper end of the sliding member (336) is fixed The carbon slide assembly is connected, and the sliding member (336) slides along the guide groove (335) to limit the reciprocating movement of the carbon slide assembly along the axial direction of the airbag spring (332); when the carbon slide assembly is kept horizontal, the sliding member (336) cooperates with the guide platform (333) to guide the carbon slide assembly to rise and fall in the vertical direction; a limit pin (337) is provided at the end of the sliding member (336) away from the carbon slide assembly, and when the carbon slide assembly is pressed down, the airbag spring (332) enters a contraction stroke, and the upper end of the guide platform (333) abuts against the bottom of the carbon slide assembly; when the carbon slide assembly is off the grid, the airbag spring (332) enters a stretching stroke, and the lower end of the guide platform (333) abuts against the limit pin (337), so that the cooperation between the limit pin (337) and the guide platform (333) limits the extension and contraction range of the airbag spring (332).

2. The micro-motion pantograph head according to claim 1, characterized in that: The balance seat (331) extends symmetrically to both sides of the skylight pipe (340), and at least one carbon slide assembly is installed on each side of the skylight pipe (340); the carbon slide assembly is arranged in a direction parallel to the axis of the skylight pipe (340).

3. The micro-motion pantograph head according to claim 1, characterized in that: The balance seats (331) at both ends of the ceiling pipe (340) form a support surface for supporting the carbon slide assembly, wherein the support surface is parallel to the axis of the ceiling pipe (340) and perpendicular to the axis of the airbag spring (332).

4. The micro-motion pantograph head according to claim 1, characterized in that: Elastic buffer pads (334) are respectively arranged at the upper and lower ends of the guide platform (333); the elastic buffer pad (334) at the upper end of the guide platform (333) abuts against the carbon slide plate assembly at the end of the extension stroke of the airbag spring (332); and the elastic buffer pad (334) at the lower end of the guide platform (333) abuts against the limit pin (337) at the end of the contraction stroke of the airbag spring (332).

5. The micro-motion pantograph head according to any one of claims 1 to 3, characterized in that: The carbon slide assembly comprises a carbon slide mounting platform (320) and a carbon slide group (310), and the carbon slide group (310) is detachably mounted on the carbon slide mounting platform (320).

6. The micro-motion pantograph head according to any one of claims 1 to 3, characterized in that: The airbag spring (332) comprises a rigid spring and an airbag wrapped around the rigid spring, and the airbag is provided with a flow limiting hole for buffering expansion and contraction.

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