Pantograph starting force adjusting structure for dealing with snowfall

Abstract

The utility model discloses a pantograph starting force adjusting structure for dealing with snowfall, and relates to the technical field of pantographs, the pantograph starting force adjusting structure comprises a pantograph body, and the pantograph body comprises a bottom frame, a main shaft and a lower arm rod; the main shaft is fixedly connected with a cam; the chain, the connecting plate and the main spring are sequentially connected, the end, away from the connecting plate, of the chain is hinged to the end, away from the main spring, of the cam, and the end, away from the connecting plate, of the main spring is hinged to the underframe; two ends of the connecting plate are respectively hinged with the chain and the main spring; a mounting plate is arranged at the end, close to the main spring, of the cam and provided with a main spring force arm adjusting mechanism. The initial action force provided by the main spring can be adjusted through a main spring force arm adjusting mechanism on the cam. The main spring moment arm adjusting mechanism presses the connecting plate downwards, the downward pressing force enables the chain and the connecting plate to pull the main spring, the main spring is further stretched, the moment arm of the main spring is changed, the tension of the main spring is changed, and therefore the aim of adjusting the initial action force of the pantograph is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pantographs, and more specifically, to a pantograph starting force adjustment structure for coping with snowfall. Background Technique

[0002] The main function of the pantograph is to obtain power from the catenary and supply power to the entire train electrical system. At the same time, it also converts the kinetic energy of the train into electrical energy through the train's regenerative braking system and feeds it back to the catenary for other trains to use, playing the role of a two-way transfer hub.

[0003] To ensure the smooth flow of traction current, there must be a certain contact pressure between the pantograph and the catenary.

[0004] Common airbag pantographs use air to raise the bow, mainly providing the raising power through compressed air. The contact force of the airbag pantograph is controlled by the air pressure, and both air pressure fluctuations and environmental temperature changes cause the contact pressure to change.

[0005] Some single-arm cylinder spring pantographs use spring tension to raise the bow, with the main spring providing the driving force. The contact force between the pantograph and the catenary is controlled by the stretching amount of the main spring, and neither air pressure fluctuations nor environmental temperature changes have any effect on it. The catenary following performance is better, and the current collection stability is better.

[0006] If there is heavy snowfall weather resulting in snow accumulation on the bow head, the weight will change, which will affect the bow raising action.

[0007] Therefore, a pantograph starting force adjustment structure for coping with snowfall is proposed. Content of the Utility Model

[0008] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pantograph starting force adjustment structure for coping with snowfall.

[0009] The purpose of the utility model is achieved through the following technical solutions:

[0010] An adjusting structure for the starting force of a pantograph for coping with snowfall, comprising a pantograph body, the pantograph body including a chassis, a main shaft rotatably connected to the chassis, and a lower arm rod fixedly connected to the main shaft; a cam in the form of a strip structure is fixedly connected to the main shaft; further comprising a chain, a connecting plate and a main spring connected in sequence, the cam and the main spring are arranged at intervals left and right in the horizontal direction, the chain is located below the cam, one end of the chain far from the connecting plate is hinged to one end of the cam far from the main spring, and one end of the main spring far from the connecting plate is hinged to the chassis; both ends of the connecting plate are respectively hinged to the chain and the main spring; an installation plate is arranged at the end of the cam close to the main spring, the installation plate is located above the connecting plate, and a main spring force arm adjusting mechanism is arranged on the installation plate.

[0011] Further, in the present utility model, the main spring force arm adjusting mechanism is a bolt, the bolt is threadedly connected to the installation plate, and one end of the bolt far from its head can abut against the connecting plate.

[0012] Further, in the present utility model, a nut is threadedly connected to the bolt, and the nut is located between the installation plate and the head of the bolt.

[0013] Further, in the present utility model, the main spring force arm adjusting mechanism includes a first bracket arranged on the installation plate, a sleeve arranged on the first bracket, and an adjusting rod passing through the sleeve. A through hole is formed on the installation plate, and one end of the adjusting rod can pass through the through hole to abut against the connecting plate; a locking mechanism is arranged on the sleeve, and the locking mechanism is used to limit the axial displacement of the adjusting rod in the sleeve.

[0014] Further, in the present utility model, the locking mechanism includes an adjusting nut threadedly connected to the upper end of the sleeve and an expansion sleeve arranged in the sleeve. A through hole adapted to the adjusting rod is formed in the middle of the adjusting nut. After the adjusting rod passes through the through hole, the expansion sleeve, the sleeve and the through hole in sequence, it can abut against the connecting plate; an inner conical surface is arranged at the lower end of the adjusting nut, and an outer conical surface adapted to the inner conical surface is arranged at the upper end of the expansion sleeve, and the outer conical surface can be attached to the inner conical surface.

[0015] Further, in the present utility model, the main spring force arm adjusting mechanism is a hydraulic rod, a second bracket is arranged on the installation plate, and the hydraulic rod is arranged on the second bracket; a through hole is formed on the installation plate, and the execution end of the hydraulic rod can pass through the through hole to abut against the connecting plate.

[0016] The beneficial effects of the present utility model are:

[0017] 1. One end of the main spring is installed on the spring seat of the underframe, and the other end is connected to the cam of the lower arm rod through a connecting plate and a chain. The starting action force provided by the main spring can be adjusted through the main spring force arm adjusting mechanism on the cam. The main spring force arm adjusting mechanism presses down the connecting plate between the chain and the main spring, and the downward pressure causes the chain and the connecting plate to pull the main spring, further stretching the main spring, thereby changing the force arm of the main spring and the change of the main spring tension (the pantograph lifting force changes), so as to achieve the purpose of adjusting the starting action force of the pantograph and eliminating the influence of snowfall on the pantograph.

[0018] 2. After the snowfall ends, the position of the main spring force arm adjusting mechanism can be adjusted so that it does not contact the connecting plate, thereby restoring the starting action force of the pantograph, and thus simply and quickly realizing the adjustment of the starting action force of the pantograph. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention;

[0020] Figure 2 is Figure 1 a partial enlarged view of A in

[0021] Figure 3 It is a schematic structural diagram of the first embodiment of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the second embodiment of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the third embodiment of the present invention.

[0024] In the figure: 101 - underframe; 102 - main shaft; 103 - lower arm rod; 201 - cam; 202 - chain; 203 - connecting plate; 204 - main spring; 301 - mounting plate; 401 - bolt; 402 - nut; 501 - first bracket; 502 - sleeve; 503 - adjusting rod; 504 - adjusting nut; 505 - expansion sleeve; 506 - pressing cap; 601 - hydraulic rod; 602 - second bracket. Detailed Embodiment

[0025] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0026] Example 1

[0027] Please refer toFigures 1-3 , the present utility model provides a technical solution:

[0028] An adjusting structure for the starting force of a pantograph for coping with snowfall, comprising a pantograph body, the pantograph body includes a chassis 101, a main shaft 102 rotatably connected to the chassis 101, and a lower arm rod 103 fixedly connected to the main shaft 102; a cam 201 in the form of a strip structure is fixedly connected to the main shaft 102; it also includes a chain 202, a connecting plate 203 and a main spring 204 connected in sequence. The cam 201 and the main spring 204 are arranged at intervals left and right in the horizontal direction. The chain 202 is located below the cam 201. One end of the chain 202 far from the connecting plate 203 is hinged to one end of the cam 201 far from the main spring 204. One end of the main spring 204 far from the connecting plate 203 is hinged to the chassis 101; both ends of the connecting plate 203 are respectively hinged to the chain 202 and the main spring 204; an installation plate 301 is arranged at the end of the cam 201 close to the main spring 204. The installation plate 301 is located above the connecting plate 203, and a main spring 204 force arm adjusting mechanism is arranged on the installation plate 301.

[0029] Specifically, in this embodiment, the main spring 204 force arm adjusting mechanism is a bolt 401. The bolt 401 is threadedly connected to the installation plate 301, and one end of the bolt 401 far from its head can abut against the connecting plate 203.

[0030] One end of the main spring 204 is installed on the spring seat of the chassis 101, and the other end is connected to the cam 201 of the lower arm rod 103 through the connecting plate 203 and the chain 202. The starting acting force provided by the main spring 204 can be adjusted through the main spring 204 force arm adjusting mechanism on the cam 201. The main spring 204 force arm adjusting mechanism presses down the connecting plate 203 between the chain 202 and the main spring 204. The downward pressure causes the chain 202 and the connecting plate 203 to pull the main spring 204, making the main spring 204 elongate, and thus changing the force arm of the main spring 204, thereby achieving the purpose of adjusting the starting acting force of the pantograph.

[0031] When it is necessary to adjust the force arm of the main spring 204, screw the bolt 401 until its end abuts against the connecting plate 203. Then continue to screw the bolt 401. From Figure 3 the perspective, make it move downward. During this process, under the action of the pulling force, the main spring 204 gradually elongates. When the main spring 204 elongates to a certain length, its force arm adjustment is in place. At this time, stop screwing the bolt 401 and maintain the current state.

[0032] When it is not necessary to adjust the force arm of the main spring 204, screw the bolt 401 in the reverse direction so that it does not contact the connecting plate 203.

[0033] In addition, a nut 402 is threadedly connected to the bolt 401, and the nut 402 is located between the mounting plate 301 and the head of the bolt 401. The purpose of mounting the nut 402 on the bolt 401 is to adjust the elongation value of the main spring 204 as needed by adjusting the position of the nut 402 on the bolt 401 in advance. As Figure 3 shown, during the downward movement of the bolt 401, the nut 402 does not contact the mounting plate 301 when the adjustment is not in place. When the elongation of the main spring 204 is adjusted in place, the nut 402 contacts the mounting plate 301, and at this time, the bolt 401 can no longer move downward.

[0034] Example 2

[0035] Please refer to Figure 4 , the difference between this embodiment and the first embodiment is that: the main spring 204 arm adjustment mechanism in this embodiment includes a first bracket 501 mounted on the mounting plate 301, a sleeve 502 mounted on the first bracket 501, and an adjustment rod 503 passing through the sleeve 502. A through hole is provided on the mounting plate 301, and one end of the adjustment rod 503 can pass through the through hole and abut against the connecting plate 203.

[0036] In order to limit the axial displacement of the adjustment rod 503 in the sleeve 502, a locking mechanism is installed in the sleeve 502.

[0037] Specifically, the locking mechanism includes an adjustment nut 504 threadedly connected to the upper end of the sleeve 502 and an expansion sleeve 505 installed in the sleeve 502. A through hole adapted to the adjustment rod 503 is provided in the middle of the adjustment nut 504. An inner conical surface is provided at the lower end of the adjustment nut 504, and an outer conical surface adapted to the inner conical surface is provided at the upper end of the expansion sleeve 505, and the outer conical surface can be fitted with the inner conical surface; the adjustment rod 503 can pass through the through hole, the expansion sleeve 505, the sleeve 502 and the through hole in sequence and abut against the connecting plate 203.

[0038] In order to increase the friction between the adjustment rod 503 and the expansion sleeve 505, when the adjustment nut 504 is operated to "tighten" the expansion sleeve 505 to hold the adjustment rod 503 so that the adjustment rod 503 cannot move axially in the expansion sleeve 505, anti-slip threads can be machined on the outer wall of the adjustment rod 503 and the inner wall of the expansion sleeve 505 to achieve the purpose of increasing the friction between the adjustment rod 503 and the expansion sleeve 505.

[0039] In addition, a pressing cap 506 can be installed on the adjustment rod 503. On the one hand, it is convenient to press the adjustment rod 503 to move it in the direction of the connecting plate 203 when adjusting the arm of the main spring 204; on the other hand, when the expansion sleeve 505 does not contact the adjustment rod 503, the pressing cap 506 can prevent the adjustment rod 503 from falling off the mounting plate 301.

[0040] Working principle:

[0041] When the lever arm of the main spring 204 does not need to be adjusted, the adjusting rod 503 can be made not to contact the connecting plate 203. At the same time, the expansion sleeve 505 is in a "tightened" state, wrapping the adjusting rod 503 inside to prevent it from falling off.

[0042] From Figure 4 's perspective, when the lever arm of the main spring 204 needs to be adjusted, first turn the adjusting nut 504 to make the adjusting nut 504 move upward until the inner conical surface at its lower end separates from the outer conical surface at the upper end of the expansion sleeve 505. After the two separate, the expansion sleeve 505 "opens" and does not contact the adjusting rod 503. Then press the adjusting rod 503 to make it move towards the connecting plate 203. When it abuts against the connecting plate 203, continue to press the adjusting rod 503. During this process, the length of the main spring 204 gradually becomes longer. When the main spring 204 extends to a certain length, its lever arm adjustment is in place. At this time, stop pressing the adjusting rod 503 downward and maintain the current state. After the elongation of the main spring 204 is adjusted in place, turn the adjusting nut 504 to make it move towards the expansion sleeve 505. When the inner conical surface of the adjusting nut 504 fits with the outer conical surface of the expansion sleeve 505, continue to turn the adjusting nut 504 to make it move downward until it cannot be turned any further. During this process, the expansion sleeve 505 gradually tightens under the action of the inner and outer conical surfaces and wraps the adjusting rod 503 inside, preventing it from moving axially.

[0043] Example 3

[0044] Please refer to Figure 5 , the difference between this embodiment and the first embodiment is that: the lever arm adjustment mechanism of the main spring 204 in this embodiment is a hydraulic rod 601. To facilitate the installation of the hydraulic rod 601, a second bracket 602 is installed on the mounting plate 301, and the hydraulic rod 601 is installed on the second bracket 602. A through hole is provided on the mounting plate 301, and the execution end of the hydraulic rod 601 can pass through the through hole and abut against the connecting plate 203.

[0045] When it is necessary to adjust the force arm of the main spring 204 by adjusting the expansion and contraction amount of the main spring 204, start the hydraulic rod 601 to make its execution end move towards the connecting plate 203 (from Figure 5 's perspective, make the execution end of the hydraulic rod 601 move downward) until its execution end abuts against the connecting plate 203. Then make the execution end of the hydraulic rod 601 continue to move downward. During this process, under the action of the pulling force, the main spring 204 gradually extends. When the main spring 204 extends to a certain length, its lever arm adjustment is in place, and the hydraulic rod 601 stops extending at this time and maintains the current state.

[0046] When the lever arm of the main spring 204 does not need to be adjusted, make the execution end of the hydraulic rod 601 "retract" so that it does not contact the connecting plate 203.

[0047] The above are only the preferred embodiments of the present utility model. It should be understood that the present utility model is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in the relevant field. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A pantograph starting force adjustment structure for coping with snowfall, comprising a pantograph body, the pantograph body comprising a base frame (101), a main shaft (102) rotatably connected to the base frame (101), and a lower arm (103) fixedly connected to the main shaft (102); a cam (201) having a strip-shaped structure is fixedly connected to the main shaft (102); and further comprising a chain (202), a connecting plate (203) and a main spring (204) connected in sequence, the cam (201) and the main spring (204) being arranged to move the cam (201) and the main spring (204) ... ) are arranged at intervals on the left and right in the horizontal direction, the chain (202) is located below the cam (201), one end of the chain (202) away from the connecting plate (203) is hinged to one end of the cam (201) away from the main spring (204), and one end of the main spring (204) away from the connecting plate (203) is hinged to the base frame (101); the two ends of the connecting plate (203) are hinged to the chain (202) and the main spring (204) respectively; it is characterized in that: A mounting plate (301) is provided at the end of the cam (201) close to the main spring (204); the mounting plate (301) is located above the connecting plate (203); and a main spring (204) force arm adjustment mechanism is provided on the mounting plate (301).

2. The pantograph starting force adjustment structure for coping with snowfall according to claim 1, characterized in that: The main spring (204) force arm adjustment mechanism is a bolt (401), the bolt (401) is threadedly connected to the mounting plate (301), and the end of the bolt (401) away from its head can abut against the connecting plate (203).

3. The pantograph starting force adjustment structure for coping with snowfall according to claim 2, characterized in that: The bolt (401) is threadedly connected with a nut (402), and the nut (402) is located between the mounting plate (301) and the head of the bolt (401).

4. The pantograph starting force adjustment structure for coping with snowfall according to claim 1, characterized in that: The main spring (204) force arm adjustment mechanism comprises a first bracket (501) arranged on the mounting plate (301), a sleeve (502) arranged on the first bracket (501), and an adjustment rod (503) passing through the sleeve (502); a through hole is provided on the mounting plate (301), and one end of the adjustment rod (503) can pass through the through hole and abut against the connecting plate (203); a locking mechanism is provided on the sleeve (502), and the locking mechanism is used to limit the axial displacement of the adjustment rod (503) in the sleeve (502).

5. The pantograph starting force adjustment structure for coping with snowfall according to claim 4, characterized in that: The locking mechanism comprises an adjusting nut (504) threadedly connected to the upper end of the sleeve (502) and an expansion sleeve (505) arranged in the sleeve (502); a through hole adapted to the adjusting rod (503) is opened in the middle of the adjusting nut (504); the adjusting rod (503) can abut against the connecting plate (203) after passing through the through hole, the expansion sleeve (505), the sleeve (502) and the through hole in sequence; an inner conical surface is arranged at the lower end of the adjusting nut (504); an outer conical surface adapted to the inner conical surface is arranged at the upper end of the expansion sleeve (505); the outer conical surface can fit with the inner conical surface.

6. The pantograph starting force adjustment structure for coping with snowfall according to claim 1, characterized in that: The main spring (204) force arm adjustment mechanism is a hydraulic rod (601); a second bracket (602) is provided on the mounting plate (301); and the hydraulic rod (601) is arranged on the second bracket (602); a through hole is provided on the mounting plate (301); an actuating end of the hydraulic rod (601) can pass through the through hole and abut against the connecting plate (203).

Images