A multi-link transmission mechanism for a collector rack and a control method thereof

Abstract

The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. Compared with the three-link, four-link and other transmission mechanisms in the prior art, the multi-link structure is adopted to amplify the transmission torque, thereby effectively shortening the time for lowering the collector pole; multiple rotation pairs are transitioned, thereby reducing the cylinder stroke; at the same time, the collector pole is movably connected to the connecting rod mechanism, and the rotation is more flexible. During the driving of the vehicle, the collector pole is not restricted by the cylinder resistance, and can swing up and down flexibly with the wire net, maintaining a stable contact force, and is not easy to fall off the wire; the overall height of the connecting rod structure is lowered to solve the problem of roof height limit; an emergency return device is provided to avoid the danger caused by accidental off-line; in addition, the axial length of the screw rod assembly is adjustable, which can provide a stable contact force for sections with different wire net heights; the collector pole can be separated from the transmission connecting rod mechanism and rotated to a position close to the ground, so that personnel do not have to climb onto the roof, which is convenient for maintenance and care.

Description

Technical Field

[0001] The present invention relates to the technical field of collector racks, and in particular to a multi-link transmission mechanism for a collector rack and a control method thereof. Background Art

[0002] Currently, the common lifting mechanism of the collector rack consists of a collector rod, a cylinder connecting frame, a cylinder, and a spring. The cylinder and spring control the vertical swing of the collector rod. When the cylinder is pressurized and extended, it drives the collector rod to complete the downward movement. When the cylinder is not pressurized, the tension of the spring drives the collector rod to complete the upward movement. However, the existing collector rack lifting mechanism still has the following defects in actual use:

[0003] 1) The collector pole is lowered once the cylinder stroke is complete, and the entire process is carried out at a consistent speed without any intermediate stops. This means that if the collector pole becomes disconnected, it cannot be lowered to a safe area in a short time, which can easily lead to safety accidents.

[0004] 2) The collector rod is directly connected to the cylinder. Due to the resistance of the cylinder itself, when the vehicle travels on a bumpy road, the collector rod cannot swing up and down flexibly and is prone to derailment.

[0005] 3) The collector rod is directly connected to the cylinder, and the range of rotation of the collector rod is limited. Maintenance and servicing personnel have to climb onto the roof to operate, which is inconvenient to operate.

[0006] 4) To meet the effective downforce and vertical yaw angle of the collector pole, the cylinder requires a long stroke and sufficient space for arrangement, which restricts the space on the roof. Summary of the Invention

[0007] In order to solve the defects and shortcomings in the above-mentioned prior art, the present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof.

[0008] The technical solution provided by the present invention is as follows: a multi-link transmission mechanism for a collector rack, comprising a base plate (1), a support base (2) capable of rotating relative to the base plate (1) being connected to the base plate (1), a large arm (8) capable of rotating synchronously with the support base (2) being connected to the support base (2), and a plurality of groups of elastic members (9) being connected between the large arm (8) and the support base (2); the support base (2) being connected to the bottom end of a cylinder bracket (3), and the top end of the cylinder bracket (3) being connected to the left end of a cylinder assembly (4);

[0009] The invention is characterized in that: the right end of the cylinder assembly (4) is hinged to the top of the swing arm (5), the bottom of the swing arm (5) is hinged to the support seat (2), the middle of the swing arm (5) is hinged to the top of the screw assembly (6), the bottom of the screw assembly (6) is hinged to the middle of the pressure arm (7), the bottom of the pressure arm (7) is hinged to the support seat (2), and the top of the pressure arm (7) is movably connected to the upper arm (8).

[0010] Furthermore, a support plate (8-1) is provided in the middle of the upper arm (8), a pressure seat (7-1) is provided at the top end of the pressure arm (7), and the pressure seat (7-1) is in movable contact with the support plate (8-1).

[0011] Furthermore, a fixing seat (8-2) is provided on the top of the upper arm (8), and a plurality of groups of elastic members (9) are connected between the fixing seat (8-2) and the connecting seat (2-1) on the supporting seat (2).

[0012] Furthermore, the cylinder assembly (4) comprises a slow cylinder (4-1) and a fast cylinder (4-2) connected in opposite directions, the slow cylinder (4-1) is connected to the cylinder bracket (3), and the fast cylinder (4-2) is connected to the swing arm (5).

[0013] Furthermore, the screw rod assembly (6) is connected to each other by thread pairs with opposite rotation directions at the upper and lower ends to achieve adjustment of the axial length.

[0014] Furthermore, the plurality of groups of elastic members (9) are tension springs, and the tension springs apply a counterclockwise rotation torque to the upper arm (8).

[0015] Furthermore, the top of the large arm (8) is fixedly connected to the bottom end of the collector rod (10), and the top end of the collector rod (10) is in contact with the contact network (12) via a carbon brush (11).

[0016] Furthermore, the swing arm (5) is configured to be L-shaped with an obtuse angle, and the middle inflection point of the swing arm (5) is configured to face the screw assembly (6) and is hinged to the top of the screw assembly (6).

[0017] Furthermore, the pressure arm (7) is configured to be L-shaped with an obtuse angle, and the middle inflection point of the pressure arm (7) is configured to face the screw assembly (6) and is hinged to the bottom of the screw assembly (6).

[0018] A control method for a multi-link transmission mechanism of a collector rack is also proposed, comprising the following steps:

[0019] 1) During driving, when there is no contact with the net, the boom (8) is locked on the roof and maintained in a horizontal state parallel to the roof, and the cylinder assembly (4) is extended to its maximum length;

[0020] 2) During vehicle driving,

[0021] When the height of the contact network (12) from the ground increases, the contact network (12) is located above the carbon brush (11), and the carbon brush (11) on the upper arm (8) is disconnected from the network; at this time, the piston rod of the slow cylinder (4-1) is controlled to retract inward to reduce the axial extension length of the cylinder assembly (4) to lift the upper arm (8) upward, thereby driving the carbon brush (11) on the top thereof to be synchronously lifted and in contact with the contact network (12);

[0022] When the height of the contact network (12) from the ground decreases, the contact network (12) is located below the carbon brush (11), and the carbon brush (11) on the upper arm (8) is disconnected from the network. At this time, the piston rod on the slow cylinder (4-1) is controlled to extend outward to increase the axial extension length of the cylinder assembly (4) to press down the upper arm (8), thereby driving the top carbon brush (11) thereof to be synchronously pressed down and contacted with the contact network (12).

[0023] 3) During vehicle driving,

[0024] When the vehicle needs to be actively disconnected from the grid, the fast cylinder (4-2) is first started, and the piston rod on the fast cylinder (4-2) is quickly extended outward to quickly increase the axial extension length of the cylinder assembly (4). When the piston rod of the fast cylinder (4-2) is extended to the limit position, the piston rod of the slow cylinder (4-1) is started again to continue to extend outward, thereby driving the swing arm (5) to rotate clockwise, and then driving the pressure arm (7) to rotate clockwise through the screw assembly (6). The pressure arm (7) then drives the upper arm (8) to rotate clockwise, thereby lowering the height of the top of the upper arm (8), and then driving the carbon brush (11) on the top of the upper arm (8) to lower its height and finally disconnect from the contact network (12). At this time, it is ensured that the driving force of the cylinder assembly (4) is greater than the restoring force of the elastic member (9), thereby completing the lowering operation;

[0025] When the vehicle needs to actively contact the contact network, the cylinder assembly (4) is not started, and the arm (8) rotates counterclockwise to a free height position under the restoring force of the elastic member (9) until the carbon brush (11) on the top of the arm (8) contacts the contact network (12), so that the current on the contact network (12) can be conducted to the vehicle through the arm (8), providing power for the vehicle to travel, thereby completing the lifting operation.

[0026] The beneficial effects achieved by the present invention compared to the prior art are:

[0027] 1) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. Compared with the three-link, four-link and other transmission mechanisms in the prior art, the multi-link structure can amplify the transmitted torque and effectively shorten the time for lowering the collector rack.

[0028] 2) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. Compared with a simple link mechanism, the multi-link mechanism gradually shortens the rotation radius of the follower through multiple transitions of the rotating pair, thereby achieving the effect of amplifying the follower stroke. For the same rotation range of the collector rod, the multi-link mechanism requires less cylinder stroke.

[0029] 3) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. The collector pole and the connecting rod mechanism are movably connected and rotate more flexibly. When there is no driving force, the collector pole and the connecting rod mechanism can be separated to achieve free rotation. When driving on a road section with obvious ups and downs, the collector pole and the cylinder are fixedly connected by a threaded pair or a pin. The cylinder needs to complete the extension and retraction action, and the overall reaction takes a certain amount of time, which makes it easy to detach from the contact network. However, when the collector pole and the cylinder are detachable, when driving from high terrain to low terrain, the collector pole is quickly separated from the connecting rod mechanism and is not restricted by the resistance of the cylinder. When driving from low terrain to high terrain, the collector pole is combined with the connecting rod mechanism again and is also not restricted by the resistance of the cylinder. Therefore, during the entire process of passing through the ups and downs of the road section, the collector pole is not restricted by the resistance of the cylinder and can flexibly swing up and down with the contact network, maintaining a stable contact force and not easily falling off the line.

[0030] 4) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. The multi-link mechanism adopts multiple rotational pair transitions around the center of the support seat to reduce the spatial dependence on a single dimension. The fulcrum of the cylinder bracket is arranged backward, which can lower the overall height of the connecting rod structure and solve the problem of roof height limit.

[0031] 5) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. By adopting a connection form in which a fast cylinder and a slow cylinder are connected in reverse, when the emergency return condition is triggered, the fast cylinder reacts quickly and can quickly push the collector pole down to a quick-descent safety height. The base synchronously rotates horizontally to be consistent with the direction of the vehicle body, so that the unhooked collector pole can quickly reach a safe area in both horizontal and vertical directions. Therefore, by setting an emergency return device, the danger caused by accidental disconnection can be avoided.

[0032] 6) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. The axial length of the screw rod assembly is adjustable, and can provide stable contact force for sections with different contact network heights.

[0033] 7) The present invention provides a multi-link transmission mechanism for a collector rack and a control method thereof. The collector rod can be separated from the transmission link mechanism and rotated to a position close to the ground. People do not have to climb onto the roof, which facilitates maintenance and care. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1It is a structural side view of the multi-link transmission mechanism of the present invention.

[0035] Figure 2 It is a top view of the structure of the multi-link transmission mechanism of the present invention.

[0036] Figure 3 This is a force analysis diagram of the multi-link transmission mechanism of the present invention. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] [Example 1]

[0041] like Figure 1-2 The figure shows a multi-link transmission mechanism for a collector rack provided by embodiment 1 of the invention, comprising a base plate 1, a support base 2 that can rotate relative to the base plate 1 is connected to the base plate 1, a large arm 8 that can rotate synchronously with the support base 2 is connected to the support base 2, and a plurality of groups of elastic members 9 are connected between the large arm 8 and the support base 2. In this embodiment, as shown in FIG. Figure 2As shown, a fixing seat 8-2 is provided at the top of boom 8. Several sets of elastic members 9 are connected between fixing seat 8-2 and connecting seat 2-1 on support base 2. The arrangement of fixing seat 8-2 and connecting seat 2-1 effectively ensures the reliability and stability of the axial extension and contraction of the several sets of elastic members 9 during use, when they are stretched by cylinder power and provide a restoring force after power is removed. In this embodiment, the several sets of elastic members 9 are tension springs that apply a counterclockwise torque to boom 8.

[0042] The technical solution claimed in this embodiment has the following advantages over the prior art:

[0043] The support base 2 is connected to the bottom end of the cylinder bracket 3, and the top end of the cylinder bracket 3 is hinged to the left end of the cylinder assembly 4; the right end of the cylinder assembly 4 is hinged to the top of the swing arm 5. In this embodiment. Figure 1 As shown, the cylinder assembly 4 includes a slow cylinder 4-1 and a fast cylinder 4-2 connected in opposite directions. The slow cylinder 4-1 is connected to the cylinder bracket 3, and the fast cylinder 4-2 is connected to the swing arm 5. The use of the fast cylinder 4-2 can effectively achieve the rapid realization of the lowering and raising of the pole, and the use of the slow cylinder 4-1 can effectively achieve the precise and stable position of the lowering and raising of the pole. In addition, by adopting the connection form of the fast cylinder and the slow cylinder connected in opposite directions, when the emergency return condition is triggered, the fast cylinder reacts quickly and can quickly push the collector pole down to the quick-descent safety height. The base rotates horizontally synchronously to be consistent with the direction of the vehicle body, so that the unhooked collector pole can quickly reach the safe area in both the horizontal and vertical directions. Therefore, by setting up an emergency return device, the danger caused by accidental disconnection is avoided.

[0044] The top of the swing arm 5 is hinged to the right end of the cylinder assembly 4, the bottom of the swing arm 5 is hinged to the support base 2, and the middle of the swing arm 5 is hinged to the top of the screw assembly 6. Figure 1 As shown, the swing arm 5 is set to be L-shaped with an obtuse angle, and the middle inflection point of the swing arm 5 is set toward the screw assembly 6, so as to facilitate hinge connection with the top of the screw assembly 6 to drive the screw assembly 6 to move synchronously when it rotates itself.

[0045] The top of the screw assembly 6 is hinged to the middle of the swing arm 5, and the bottom of the screw assembly 6 is hinged to the middle of the pressure arm 7. As a further preferred embodiment of this embodiment, the screw assembly 6 uses a threaded pair with opposite rotation directions at the upper and lower ends to connect to each other to achieve axial length adjustment. By adjusting the axial length of the screw assembly 6, a stable contact force can be provided for sections with different contact network heights.

[0046] The bottom of the pressing arm 7 is hinged to the support base 2, and the top of the pressing arm 7 is movably connected to the arm 8. In this embodiment, Figure 1As shown, the pressure arm 7 is set to be L-shaped with an obtuse angle, and the middle inflection point of the pressure arm 7 is set toward the screw assembly 6, so as to facilitate the hinge connection with the bottom of the screw assembly 6 to facilitate its corresponding rotational movement driven by the movement of the screw assembly 6. A support plate 8-1 is provided in the middle of the upper arm 8, and a pressure seat 7-1 is provided at the top of the pressure arm 7. The pressure seat 7-1 is in active contact with the support plate 8-1. Those skilled in the art will know that the active contact here can be an active contact method including contact methods such as overlap, and the specific active contact method selected should not be used as a further limitation on the scope of protection requested by this application. The active connection method between the pressure arm 7 and the upper arm 8 here makes the rotation more flexible. When there is no driving force, the collector rod and the connecting rod mechanism can be separated from each other to achieve free rotation. When driving on a road section with obvious high and low undulations, the collector rod and the cylinder are fixedly connected using a fixed connection method such as a threaded pair or a pin. The cylinder needs to complete the extension and retraction action, and the overall reaction takes a certain amount of time, which can easily cause the collector rack to detach from the contact network. The detachable design employed in this embodiment allows the collector rod to quickly detach from the connecting rod mechanism when traveling from high to low terrain, unrestricted by cylinder resistance. When traveling from low to high terrain, the collector rod reconnects with the connecting rod mechanism, again unrestricted by cylinder resistance. Therefore, throughout the entire process of navigating uneven roads, the collector rod is unrestricted by cylinder resistance and can flexibly swing up and down with the contact wire, maintaining stable contact force and preventing derailment.

[0047] like Figure 1 As shown, the top of the boom 8 is fixedly connected to the bottom end of the collector rod 10, and the top of the collector rod 10 is in contact with the contact network 12 through the carbon brush 11. By raising and lowering the boom 8, the corresponding top carbon brush 11 of the collector rod 10 can be in contact with or out of contact with the contact network 12.

[0048] like Figure 3 As shown, in the technical solution provided in this embodiment, A, B, C, D, E, and F are the positions of the hinge points in the connecting rod mechanism, and perpendicular lines to the connecting line of points CD are drawn through points A and B, and intersect at the positions of the hinge points A′ and B′, respectively.

[0049] Assume that the torque applied by the cylinder assembly 4 to the swing arm 5 is M1, the torque applied to the upper arm 8 after being transmitted through the multi-link connecting rod is M2, the pressure on the screw assembly 6 is F, and the system is in a balanced state.

[0050] At this time, the force condition at the swing arm 5 is: M1 = F × AA′;

[0051] At this time, the force condition at the pressure arm 7 is: M2 = F × BB';

[0052] From the above two formulas, we can get M2=(AA′ / BB′)×M1,

[0053] Since AA' / BB'>1, we know that M2>M1.

[0054] Therefore, the multi-link mechanism in the technical solution provided by this embodiment can effectively achieve the amplification effect of the transmitted torque.

[0055] [Example 2]

[0056] Embodiment 2 of the present invention further provides a method for controlling a multi-link transmission mechanism for a collector rack, comprising the following steps:

[0057] 1) During driving, without touching the net, the boom 8 is locked on the roof and remains parallel to the roof, and the cylinder assembly 4 is extended to its maximum length;

[0058] 2) During vehicle driving,

[0059] When the height of the contact network 12 from the ground increases, the contact network 12 is located above the carbon brush 11, and the carbon brush 11 on the arm 8 is disconnected from the network; at this time, the piston rod of the slow cylinder 4-1 is controlled to retract inward to reduce the axial extension length of the cylinder assembly 4, so as to lift the arm 8 upward, thereby driving the carbon brush 11 on its top to rise synchronously and contact the contact network 12;

[0060] When the height of the contact network 12 from the ground decreases, the contact network 12 is located below the carbon brush 11, and the carbon brush 11 on the arm 8 becomes off the network. At this time, the piston rod on the slow cylinder 4-1 is controlled to extend outward to increase the axial extension length of the cylinder assembly 4 to press down the arm 8, thereby driving the top carbon brush 11 to be pressed down synchronously and contact the contact network 12.

[0061] 3) During vehicle driving,

[0062] When the vehicle needs to actively disconnect from the grid, the fast cylinder 4-2 is first started, and the piston rod on the fast cylinder 4-2 is quickly extended outward to quickly increase the axial extension length of the cylinder assembly 4. When the piston rod of the fast cylinder 4-2 is extended to the limit position, the piston rod of the slow cylinder 4-1 is started again to continue to extend outward, thereby driving the swing arm 5 to rotate clockwise, and then driving the pressure arm 7 to rotate clockwise through the screw assembly 6. The pressure arm 7 then drives the boom 8 to rotate clockwise, thereby lowering the height of the top of the boom 8, and then drives the carbon brush 11 on the top of the boom 8 to lower its height and finally break away from the contact network 12. At this time, it is ensured that the driving force of the cylinder assembly 4 is greater than the restoring force of the elastic member 9, thereby completing the arm lowering operation;

[0063] When the vehicle needs to actively contact the contact network, the cylinder assembly 4 is not started. The arm 8 rotates counterclockwise to the free height position under the restoring force of the elastic part 9 until the carbon brush 11 on the top of the arm 8 contacts the contact network 12, so that the current on the contact network 12 can be conducted to the vehicle through the arm 8, providing power for the vehicle to travel, thereby completing the lifting operation.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed thereby. Any reference signs in the claims should not be construed as further limiting the scope of the invention.

Claims

1. A multi-link transmission mechanism for a collector rack, comprising a base plate (1), a support base (2) capable of rotating relative to the base plate (1) being connected to the base plate (1), a large arm (8) capable of rotating synchronously with the support base (2) being connected to the support base (2), and a plurality of groups of elastic members (9) being connected between the large arm (8) and the support base (2); the support base (2) being connected to the bottom end of a cylinder bracket (3), and the top end of the cylinder bracket (3) being connected to the left end of a cylinder assembly (4); Its characteristics are: The right end of the cylinder assembly (4) is hinged to the top of the swing arm (5), the bottom of the swing arm (5) is hinged to the support seat (2), the middle of the swing arm (5) is hinged to the top of the screw assembly (6), the bottom of the screw assembly (6) is hinged to the middle of the pressure arm (7), the bottom of the pressure arm (7) is hinged to the support seat (2), and the top of the pressure arm (7) is movably connected to the large arm (8).

2. The multi-link transmission mechanism for a collector rack according to claim 1, characterized in that: A support plate (8-1) is provided in the middle of the upper arm (8), a pressure seat (7-1) is provided at the top end of the pressure arm (7), and the pressure seat (7-1) is in movable contact with the support plate (8-1).

3. The multi-link transmission mechanism for a collector rack according to claim 1, characterized in that: A fixing seat (8-2) is provided on the top of the large arm (8), and a plurality of groups of elastic members (9) are connected between the fixing seat (8-2) and the connecting seat (2-1) on the supporting seat (2).

4. The multi-link transmission mechanism for a collector rack according to claim 1, characterized in that: The cylinder assembly (4) comprises a slow cylinder (4-1) and a fast cylinder (4-2) connected in opposite directions, the slow cylinder (4-1) is connected to the cylinder bracket (3), and the fast cylinder (4-2) is connected to the swing arm (5).

5. The multi-link transmission mechanism for a collector rack according to claim 1, characterized in that: The screw rod assembly (6) is connected to each other by thread pairs with opposite rotation directions at the upper and lower ends to achieve adjustment of the axial length.

6. The multi-link transmission mechanism for a collector rack according to claim 1, characterized in that: The plurality of groups of elastic members (9) are tension springs, and the tension springs apply a counterclockwise rotating torque to the upper arm (8).

7. The multi-link transmission mechanism for a collector rack according to claim 1, characterized in that: The top of the large arm (8) is fixedly connected to the bottom end of the collector rod (10), and the top end of the collector rod (10) is in contact with the contact network (12) via a carbon brush (11).

8. A multi-link transmission mechanism for a collector rack according to any one of claims 1 to 7, characterized in that: The swing arm (5) is configured to be L-shaped with an obtuse angle, and the middle inflection point of the swing arm (5) is configured to face the screw assembly (6) and is hinged to the top of the screw assembly (6).

9. A multi-link transmission mechanism for a collector rack according to any one of claims 1 to 7, characterized in that: The pressure arm (7) is configured to be L-shaped with an obtuse angle, and the middle inflection point of the pressure arm (7) is configured to face the screw assembly (6) and is hinged to the bottom of the screw assembly (6).

10. The control method for a multi-link transmission mechanism of a collector rack according to claim 4, characterized in that: The following steps are involved: 1) During driving, when there is no contact with the net, the boom (8) is locked on the roof and maintained in a horizontal state parallel to the roof, and the cylinder assembly (4) is extended to its maximum length; 2) During vehicle driving, When the height of the contact network (12) from the ground increases, the contact network (12) is located above the carbon brush (11), and the carbon brush (11) on the upper arm (8) is disconnected from the network; at this time, the piston rod of the slow cylinder (4-1) is controlled to retract inward to reduce the axial extension length of the cylinder assembly (4) to lift the upper arm (8) upward, thereby driving the carbon brush (11) on the top thereof to be synchronously lifted and in contact with the contact network (12); When the height of the contact network (12) from the ground decreases, the contact network (12) is located below the carbon brush (11), and the carbon brush (11) on the upper arm (8) is disconnected from the network. At this time, the piston rod on the slow cylinder (4-1) is controlled to extend outward to increase the axial extension length of the cylinder assembly (4) to press down the upper arm (8), thereby driving the top carbon brush (11) thereof to be synchronously pressed down and contacted with the contact network (12); 3) During vehicle driving, When the vehicle needs to be actively disconnected from the grid, the fast cylinder (4-2) is first started, and the piston rod on the fast cylinder (4-2) is quickly extended outward to quickly increase the axial extension length of the cylinder assembly (4). When the piston rod of the fast cylinder (4-2) is extended to the limit position, the piston rod of the slow cylinder (4-1) is started again to continue to extend outward, thereby driving the swing arm (5) to rotate clockwise, and then driving the pressure arm (7) to rotate clockwise through the screw assembly (6). The pressure arm (7) then drives the upper arm (8) to rotate clockwise, thereby lowering the height of the top of the upper arm (8), and then driving the carbon brush (11) on the top of the upper arm (8) to lower its height and finally disconnect from the contact network (12). At this time, it is ensured that the driving force of the cylinder assembly (4) is greater than the restoring force of the elastic member (9), thereby completing the lowering operation; When the vehicle needs to actively contact the contact network, the cylinder assembly (4) is not started, and the arm (8) rotates counterclockwise to a free height position under the restoring force of the elastic member (9) until the carbon brush (11) on the top of the arm (8) contacts the contact network (12), so that the current on the contact network (12) can be conducted to the vehicle through the arm (8), providing power for the vehicle to travel, thereby completing the lifting operation.

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