A kind of auxiliary tool for subway train pantograph maintenance

Abstract

The utility model discloses a kind of auxiliary tools for metro train pantograph overhauling, including support rod and clamping mechanism, the support rod one end face is equipped with first clamping groove, first clamping groove can be inserted for the manual operation device of solenoid valve, and the other end detachably installed with clamping mechanism;Clamping mechanism includes claw and tight piece, claw is rotatably fixedly connected with support rod, claw is equipped with second clamping groove, the both ends of second clamping groove length direction are through setting, the second clamping groove notch is towards the side away from support rod, second clamping groove can be inserted for the object fixed periphery, tight piece one end passes through the side wall of second clamping groove and the object in second clamping groove abuts and is fixed, under no electricity state, metro pantograph can be conveniently lifted.

Description

Technical Field

[0001] This utility model belongs to the field of equipment auxiliary maintenance technology, specifically relating to an auxiliary tool for the maintenance of pantographs on subway trains. Background Technology

[0002] Currently, the main function of the pantograph in subway vehicles is to supply power from the overhead contact line to the entire train's electrical system and to transmit regenerative braking energy. The pantograph is a key component for electric locomotives and subway trains to obtain electrical energy, and it can operate normally on both rigid and flexible overhead contact lines. This device exhibits good dynamic performance across the vehicle's operating speed range, ensuring good contact and stability with the overhead contact line under various track and speed conditions.

[0003] During maintenance, some maintenance items require raising and lowering the pantograph by independently controlling the air circuit when there is no electrical control. For electric trains without separate air circuit valves, such as the A2 type metro trains of Guangzhou Metro Line 1 and Line 8, it is necessary to operate the manual device of the solenoid valve to control the raising and lowering of the pantograph when the metro is without power. However, due to space constraints, it is not convenient to raise and lower the metro pantograph when there is no power.

[0004] Therefore, a new technology is needed to solve the problem of the inconvenience of raising and lowering the pantograph of the subway during the cleaning process when there is no power, which is a problem in the existing technology. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides an auxiliary tool for the maintenance of pantographs on subway trains, which allows for convenient raising and lowering of the pantograph in the absence of power.

[0006] The present invention adopts the following technical solution: An auxiliary tool for maintaining a pantograph on a subway train includes a support rod and a clamping mechanism. One end face of the support rod is provided with a first slot, which allows a manual operating device of a solenoid valve to be inserted. The other end is detachably fitted with the clamping mechanism. The clamping mechanism includes a claw and a clamping member. The claw is rotatably and fixedly connected to the support rod. The claw is provided with a second slot, which is through at both ends in the length direction. The opening of the second slot faces away from the support rod. The second slot can be used to insert objects that are fixed in the periphery. One end of the clamping member passes through one side wall of the second slot and abuts against and fixes the object in the second slot.

[0007] As a further improvement to the technical solution of this utility model, the first slot is provided through both ends in the length direction, the support rod is cylindrical, and the length direction of the first slot is perpendicular to the axis of the support rod.

[0008] As a further improvement to the technical solution of this utility model, the bottom of the first card slot is arc-shaped.

[0009] As a further improvement to the technical solution of this utility model, it also includes a clamping head, which is detachably mounted on the end face of the support rod away from the clamping mechanism, and the first clamping groove is located on the clamping head.

[0010] As a further improvement to the technical solution of this utility model, the claw includes a first plate, a second plate, and a third plate connected in a C-shape in sequence. The first plate and the third plate are parallel to each other and both are perpendicular to the second plate. The second plate is parallel to the axis of the support rod, and the first plate and the third plate are perpendicular to the axis of the support rod. The second plate is rotatably fixedly connected to the support rod. The second slot is formed on one side of the first plate, the second plate, and the third plate that are close to each other; One end of the clamping member passes through the third plate and is threadedly connected to the third plate. The third plate is provided with a threaded hole that is compatible with the clamping member.

[0011] As a further improvement to the technical solution of this utility model, the third plate is located on the side away from the card head.

[0012] As a further improvement to the technical solution of this utility model, a limiting block is installed at the end of the clamping member located in the second slot, and the size of the limiting block is larger than the size of the threaded hole.

[0013] As a further improvement to the technical solution of this utility model, it also includes a fastener, one end of which passes through the second plate and the support rod and fixes the second plate and the support rod together. The support rod is provided with a through hole through which the fastener can pass, and the axis of the through hole is perpendicular to the axis of the support rod.

[0014] As a further improvement to the technical solution of this utility model, the limiting block includes a threaded connecting rod and a limiting part that are fixedly connected to each other. The limiting part is frustum-shaped, and the cross-sectional dimension of the limiting part at one end near the threaded connecting rod is smaller than the cross-sectional dimension of the other end.

[0015] As a further improvement to the technical solution of this utility model, a groove is provided on the end face of the limiting part away from the threaded connecting rod.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: In the absence of power, i.e., when the subway train is not energized, manual operation of the pantograph raising and lowering is required. This solution utilizes the auxiliary tool for subway train pantograph maintenance to operate the manual operating device of the solenoid valve, thus opening and closing the air path for pantograph raising and lowering, facilitating the raising and lowering of the subway pantograph. During use, hold one end of the support rod and adjust its position so that the circular manual operating device extends into the first slot. Adjust the circular manual operating device to the appropriate position using the support rod to open and close the air path for pantograph raising and lowering. After adjustment, one end of the support rod can be fixed to a surrounding fixing mechanism or other fixed part using a clamp and a locking device. The clamp can be rotated relative to the aforementioned part to adapt its position. Simultaneously, the clamp is fixed to the aforementioned part using the locking device, and the clamp is secured to the support rod with bolts to prevent the support rod from detaching from the manual operating device of the solenoid valve. During pantograph maintenance, this method reduces the physical burden on operators, allows the solenoid valve to remain manually operated and open for extended periods, and saves manpower, optimizing the allocation of maintenance human resources. Attached Figure Description The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model; Figure 3 This is a top view of the overall structure of this utility model.

[0017] Figure label: 1-Support rod; 11-Holding part; 2-Card head; 21-First card slot; 3-Clamping mechanism; 31-Claw; 311-First plate; 312-Second plate; 313-Third plate; 314-Second slot; 32-Securing component; 33-Limiting block; 331-Threaded connecting rod; 332-Limiting part; 4-Fasteners. Detailed Implementation

[0018] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0019] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0020] Reference Figures 1 to 3 An auxiliary tool for maintaining a pantograph on a subway train includes a support rod 1 and a clamping mechanism 3. The support rod 1, which may be made of nylon, serves to fix the manual operating device of a solenoid valve and trigger its actuation stroke. One end of the support rod 1 has a first slot 21 for inserting the manual operating device of the solenoid valve, and the other end has a handle. The clamping mechanism 3 is detachably mounted on the support rod 1 near the handle 11. The clamping mechanism 3 includes a claw 31 and a clamping member 32, both of which may be made of stainless steel. The claw 31 is rotatably fixed to the support rod 1. The claw 31 has a second slot 314, which extends through both ends along its length. The opening of the second slot 314 faces away from the support rod 1, allowing a fixed object to be inserted. One end of the clamping member 32 passes through one side wall of the second slot 314 and abuts against and fixes the object inside the slot 314. There is a gap between the clamping mechanism 3 and the end face of the support rod 1, that is, the clamping mechanism 3 is not installed at the end face of the support rod 1, so that the support rod 1 has enough slack at this end, so that the support rod 1 can be grasped by hand for operation.

[0021] When the subway train is de-energized, manual operation of the pantograph is required. This can be achieved by using a manual operating device on the solenoid valve to control the air supply for pantograph raising and lowering. The operator needs to lift a circular manual operating device (approximately 10mm in diameter) located above the solenoid valve to control the air supply when the solenoid valve is de-energized. Lifting the device opens the air supply, raising the pantograph; releasing the device releases the air from the solenoid valve, lowering the pantograph. However, the manual operating device is not ideal for prolonged operation. It lacks a self-holding mechanism, and during pantograph maintenance, some procedures require the solenoid valve to remain open for extended periods to maintain the air supply and keep the pantograph raised. This can lead to operator fatigue and difficulty maintaining the device in this position for long periods, impacting maintenance efficiency and stability. Furthermore, because manual operation is required, the circular manual operating device is inconvenient to access directly by hand when space is limited. The auxiliary tool for pantograph maintenance of subway trains using this solution can lock a circular manual operating device in the first slot 21 at one end of the support rod 1. By operating the support rod 1, the air circuit used for pantograph raising and lowering can be switched on and off to achieve the raising and lowering of the pantograph.

[0022] In use, hold the handle 11 and adjust the position of the support rod 1 so that the circular manual operating device extends into the first slot 21. Adjust the circular manual operating device to a suitable position using the support rod 1 to allow the air circuit for pantograph raising and lowering to be switched on and off, thereby raising and lowering the pantograph. After adjustment, one end of the support rod 1 can be fixed to a surrounding fixing mechanism or other fixed part using the claw 31 and the clamping member 32. The claw 31 can be rotated relative to the aforementioned part to adapt its position. Then, the claw 31 is fixed to the aforementioned part using the clamping member 32, and the claw 31 is fixed to the support rod 1 with bolts to prevent the support rod 1 from falling off and separating from the manual operating device of the solenoid valve.

[0023] The manual operating device of the solenoid valve has an approximately T-shaped upper part, including a horizontal circular plate and a vertical connecting rod that are fixedly connected to each other in a T-shape. The horizontal cross-sectional dimension of the uppermost horizontal circular plate is larger than the cross-section of the first slot 21 along the length of the support rod 1, allowing the vertical connecting rod to be embedded in the first slot 21. In use, the first slot 21 is used to lock the numerical connecting rod of the manual operating device of the solenoid valve. The support rod 1 is connected to a surrounding fixing mechanism or other fixed part via the clamping mechanism 3, and the nut on the fastener 4 is not tightened at this time. Since the clamping mechanism 3 is located between the two ends of the support rod, pressing down on the end of the support rod away from the first slot 21 lifts the manual operating device of the solenoid valve upwards. Then, tightening the nut on the fastener 4 secures the clamping mechanism 3 to the support rod 1, preventing relative rotation between the clamping mechanism 3 and the support rod 1, thus keeping the manual operating device of the solenoid valve in an upward-lifted state. This solution reduces the physical burden on operators while allowing the solenoid valve to remain manually operated for extended periods, saving manpower and optimizing maintenance resource allocation. The solution uses a snap-fit ​​mechanism to secure the circular manual operating device of the solenoid valve, thus opening the air path. The tool's overall structure is simple, convenient for maintenance personnel, and improves work efficiency and reliability. It effectively solves the problems of inconvenience and effort associated with manually operating solenoid valves, as well as unstable airflow into and out of the solenoid valve leading to incomplete pantograph lifting, affecting maintenance personnel and resulting in inaccurate measurement data.

[0024] Specifically, the first slot 21 is provided through both ends in the length direction, the support rod 1 is cylindrical, and the bottom of the first slot 21 is arc-shaped.

[0025] Specifically, the auxiliary tool for pantograph maintenance of subway trains in this solution also includes a clamp 2. The clamp 2 is detachably mounted on the end face of the support rod 1 away from the clamping mechanism 3, and the first slot 21 is located on the clamp 2. The cylindrical support rod 1 of this solution has a clamp 2 with a concave ring shape at its end. The clamp 2 is provided with a first slot 21 that can match the manual operating device of the solenoid valve. The manual operating device is engaged by the first slot 21, causing a change in the stroke of the manual device, which drives the internal valve body to move and conduct the compressed air used to control the pantograph raising. After confirming that the air passage is open, the support rod 1 is fixed to the surrounding fixing mechanism by the claw 31 and the clamping member 32, so that the tool as a whole is kept in a fixed position and the operation is not affected by the tool shaking or falling off.

[0026] Specifically, the claw 31 includes a first plate 311, a second plate 312, and a third plate 313 connected in a C-shape in sequence. The first plate 311 and the third plate 313 are parallel to each other and perpendicular to the second plate 312. The second plate 312 is parallel to the axis of the support rod 1, and the first plate 311, the third plate 313, and the axis of the support rod 1 are perpendicular to each other. The second plate 312 is rotatably fixed to the support rod 1. A second slot 314 is formed on the side of the first plate 311, the second plate 312, and the third plate 313 that are close to each other. One end of the clamping member 32 passes through the third plate 313 and is threadedly connected to the third plate 313. The third plate 313 is provided with a threaded hole adapted to the clamping member 32.

[0027] Specifically, the third plate 313 is located on the side away from the card head 2.

[0028] Specifically, a limiting block 33 is installed on the end of the clamping member 32 located in the second slot 314, and the size of the limiting block 33 is larger than the size of the threaded hole.

[0029] Specifically, the auxiliary tool for pantograph maintenance of subway trains in this solution also includes a fastener 4. One end of the fastener 4 passes through the second plate 312 and the support rod 1, fixing the second plate 312 and the support rod 1 together. The support rod 1 has a through hole through which the fastener 4 can pass, and the axis of the through hole is perpendicular to the axis of the support rod 1. The fastener 4 can be a bolt and nut assembly.

[0030] Specifically, the limiting block 33 includes a threaded connecting rod 331 and a limiting part 332 that are fixedly connected to each other. The limiting part 332 is frustum-shaped. The cross-sectional dimension of the limiting part 332 near the threaded connecting rod 331 is smaller than the cross-sectional dimension of the other end. The threaded connecting rod 331 is threadedly connected to the end of the tightening member 32. The end of the tightening member 32 is provided with a threaded hole that matches the threaded connecting rod 331. The tightening member 32 can be a bolt or a locking bolt.

[0031] Specifically, the end face of the limiting part 332 away from the threaded connecting rod 331 is provided with a groove. The connection node between the end face of the limiting part 332 at this end and the inner wall of the groove, as well as the connection node between the end face of the limiting part 332 and the outer side of the limiting part 332, are all smoothly transitioned.

[0032] The auxiliary tool for pantograph maintenance of metro trains using this solution was applied in a trial run on 15 A2 type trains at the Baiyun Lake Depot of Guangzhou Metro. Each train saved one person 30 minutes of operation time at this workstation, resulting in a monthly saving of 7.5 hours of labor time for the 15 trains, and an annual saving of 90 hours. On-site maintenance personnel found the tool easy to operate and highly efficient, significantly improving maintenance efficiency. The original operation required operators to continuously lift the solenoid valve manually, leading to hand muscle fatigue and making sustained operation difficult. The new tool greatly reduces the operational difficulty for on-site personnel.

[0033] Other aspects of the auxiliary tool for pantograph maintenance of subway trains described in this utility model are found in the prior art and will not be repeated here.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An auxiliary tool for maintaining the pantograph of a subway train, characterized in that: The device includes a support rod and a clamping mechanism. One end of the support rod has a first slot for inserting a manual operating device of the solenoid valve. The other end is detachably fitted with the clamping mechanism. The clamping mechanism includes a claw and a clamping member. The claw is rotatably fixed to the support rod. The claw has a second slot, which extends through both ends along its length. The opening of the second slot faces away from the support rod. The second slot allows for the insertion of a fixed object. One end of the clamping member passes through one side wall of the second slot and abuts against and fixes the object inside the second slot.

2. The auxiliary tool for pantograph maintenance of subway trains according to claim 1, characterized in that: The first slot is provided through both ends in the length direction, and the support rod is cylindrical. The length direction of the first slot is perpendicular to the axis of the support rod.

3. The auxiliary tool for pantograph maintenance of subway trains according to claim 2, characterized in that: The bottom of the first card slot is curved.

4. The auxiliary tool for pantograph maintenance of subway trains according to claim 3, characterized in that: It also includes a clip head, which is detachably mounted on the end face of the support rod away from the clamping mechanism, and the first clip slot is located on the clip head.

5. The auxiliary tool for pantograph maintenance of subway trains according to claim 4, characterized in that: The claw includes a first plate, a second plate, and a third plate connected in a C-shape in sequence. The first plate and the third plate are parallel to each other and both are perpendicular to the second plate. The second plate is parallel to the axis of the support rod, and the first plate and the third plate are perpendicular to the axis of the support rod. The second plate is rotatably fixed to the support rod. The second slot is formed on one side of the first plate, the second plate, and the third plate that are close to each other; One end of the clamping member passes through the third plate and is threadedly connected to the third plate. The third plate is provided with a threaded hole that is compatible with the clamping member.

6. The auxiliary tool for pantograph maintenance of subway trains according to claim 5, characterized in that: The third plate is located on the side away from the card head.

7. The auxiliary tool for pantograph maintenance of subway trains according to claim 5, characterized in that: A limiting block is installed at the end of the clamping member located in the second slot, and the size of the limiting block is larger than the size of the threaded hole.

8. The auxiliary tool for pantograph maintenance of subway trains according to claim 5, characterized in that: It also includes a fastener, one end of which passes through the second plate and the support rod and fixes the second plate and the support rod together. The support rod has a through hole through which the fastener can pass, and the axis of the through hole is perpendicular to the axis of the support rod.

9. The auxiliary tool for pantograph maintenance of subway trains according to claim 7, characterized in that: The limiting block includes a threaded connecting rod and a limiting part that are fixedly connected to each other. The limiting part is frustum-shaped, and the cross-sectional dimension of the limiting part at one end near the threaded connecting rod is smaller than the cross-sectional dimension of the other end.

10. The auxiliary tool for pantograph maintenance of subway trains according to claim 9, characterized in that: The end face of the limiting part away from the threaded connecting rod is provided with a groove.

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