A push-and-pull type back-off device with a stop pin shaft

Abstract

This utility model discloses an easy-pull retraction device with a stop pin, relating to the field of rail transit current collector technology. It includes a retraction base with a rotating groove, on which a stop pin is inserted. A push-pull rod is connected to the stop pin. The front end of the push-pull rod has a downward pushing arc and an upward pulling arc, and the tail end of the push-pull rod is engaged with a lever arm. Tension spring pins are provided on both sides of the rotating groove of the retraction base and the push-pull rod, with retraction tension springs connected to the tension spring pins. A stop part is provided on the retraction base. This utility model allows operation of the device at the train door using insulated tools to raise and lower the current collector's shoe. Pushing down the push-pull rod and pressing down the current collector arm releases the shoe, while pulling up resets it. It is time-saving, labor-saving, and easy to operate. The engagement height can be adjusted by rotating the adjusting screw, thereby adjusting the height of the carbon slipper's release position. It is simple, convenient, and highly versatile. Furthermore, one side of the stop pin uses a positioning plate to prevent detachment, and the other side uses a fan-shaped stop to prevent detachment, providing double-sided detachment prevention for safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of current collector technology in rail transit, and in particular to an easy-pull retraction device with a stop pin. Background Technology

[0002] With the rapid development of the rail transit industry, higher requirements have been placed on the safe, reliable, and efficient operation of vehicles. As a key component for obtaining electrical energy from rail transit vehicles, the current collector's performance directly affects the vehicle's traction capacity and operating efficiency. Current collectors are mainly used in lines with third-rail power supply, installed on both sides of the vehicle's bogie frame near the outer center of the vehicle. In use, the carbon sliding shoe is lowered, contacting and conducting with the third rail (i.e., the conductive rail), i.e., "shoe closed." In case of malfunction or when not in use, the carbon sliding shoe is retracted, isolating and disconnecting from the third rail, i.e., "shoe removed." The device controlling the carbon sliding shoe's engagement and disengagement is the retraction device. The retraction device is also a crucial component of the current collection system. It has functions of locking after shoe removal and unlocking / resetting. In case of abnormal current collection, timely separation from the power supply rail is required. The retraction device can lock it in the separated position, and after the abnormality is resolved, it can reset the sliding shoe.

[0003] Traditional current collectors' retraction devices can only be operated from outside the vehicle. Even with modifications to allow operation from inside the vehicle, it is extremely laborious and difficult. Furthermore, traditional retraction devices suffer from the lack of an anti-detachment stop on the pin, making the pin prone to falling off; and the inability to flexibly adjust the height of the carbon skates.

[0004] Therefore, it is necessary to design an easy-pull retraction device with a stop pin to improve the above problems. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides an easy-pull retraction device with a stop pin, which not only enables the lifting and lowering of the receiver's shoe on a vehicle, making it easy and labor-saving, but also allows for flexible adjustment of the height of the shoe removal position, greatly improving the convenience and practicality of operation. The pin also features a fan-shaped stop for preventing slippage.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A push-pull retraction device with a stop pin includes a retraction base connected to a current receiver. A rotating groove is formed on the retraction base, and a stop pin is installed on the rotating groove. A push-pull rod is connected to the stop pin and can rotate. The front end of the push-pull rod is provided with a downward pushing arc and an upward pulling arc, and the tail end of the push-pull rod is engaged with a toggle arm. Tension spring pins are provided on both sides of the rotating groove of the retraction base and the push-pull rod. Retraction tension springs are connected to the tension spring pins. The retraction base is provided with a stop part for adjusting the stop position of the push-pull rod.

[0008] As a preferred embodiment of this invention, the stop part includes an adjusting screw and an adjusting nut.

[0009] As a preferred embodiment of this utility model, the push-pull rod is provided with a bearing, which is mounted on the stop pin.

[0010] As a preferred embodiment of this utility model, one side of the stop pin is provided with a positioning piece that engages with the stop pin, and the positioning piece is locked by a positioning screw, while the other side is provided with a fan-shaped stop.

[0011] As a preferred embodiment of this invention, the actuating arm is disposed on the square shaft of the current receiver.

[0012] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are:

[0013] 1. This utility model provides an easy-pull retraction device with a stop pin. The device can be operated at the train door using an insulated tool to disengage and retract the current collector shoe. Pushing down the push-pull rod and pressing down the current receiving arm will disengage the shoe, while pulling up the push-pull rod will reset the carbon slip shoe. It is time-saving, labor-saving, and easy to operate.

[0014] 2. This utility model provides an easy-pull retraction device with a stop pin. By rotating the adjusting screw, the height of the locking mechanism can be adjusted as needed, thereby realizing the function of adjusting the height of the carbon skate removal position. It can also be locked with an adjusting nut. It is simple, convenient, and highly versatile.

[0015] 3. The present invention provides an easy-pull retraction device with a stop pin. One side of the stop pin is equipped with a positioning plate to prevent detachment, and the other side is equipped with a fan-shaped stop to prevent detachment. It has double-sided anti-detachment, making it safe and reliable. Attached Figure Description

[0016] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0017] Figure 1 This is a front view of the present invention;

[0018] Figure 2 yes Figure 1 Sectional view along the middle AA direction;

[0019] Figure 3 This is an isometric drawing of this utility model;

[0020] Figure 4 This is another isometric view of this utility model;

[0021] Figure 5 This is an exploded view of this utility model;

[0022] Figure 6This is an isometric drawing after the application of this utility model;

[0023] The reference numerals in the attached drawings include: 1. Retractable base; 2. Stop pin; 3. Push-pull rod; 4. Actuating arm; 5. Tension spring pin; 6. Retractable tension spring; 7. Stop part; 8. Bearing; 11. Rotating groove; 21. Positioning piece; 22. Positioning screw; 31. Downward push arc; 32. Upward pull arc; 71. Adjusting screw; 72. Adjusting nut; 91. Flow receiving arm; 92. Carbon slipper; 93. Adjusting bracket; 94. Square shaft. Detailed Implementation

[0024] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0028] Reference Figures 1 to 6 , Figure 1 This is a front view of the present invention. Figure 2 yes Figure 1 Sectional view along the AA direction. Figure 3 This is an axonometric drawing of this utility model. Figure 4 This is another axonometric drawing of this utility model. Figure 5 This is an exploded view of this utility model. Figure 6 This is an isometric drawing of the application of this utility model. This utility model provides an easy-pull retraction device with a stop pin, including a retraction base 1, a stop pin 2, a push-pull rod 3, a lever arm 4, a tension spring pin 5, a retraction tension spring 6, a stop part 7, and a bearing 8. The retraction base 1 is bolted to an adjusting bracket 93 on the receiver. A rotating groove 11 is formed on the retraction base 1, and the stop pin 2 passes through the rotating groove 11. One side of the stop pin 2 is provided with... A positioning piece 21 is engaged with the groove of the stop pin 2. The positioning piece 21 is locked by a positioning screw 22. A fan-shaped stop is provided on the other side of the stop pin 2. A bearing 8 is provided inside the push-pull rod 3. The bearing 8 is pressed into the corresponding hole of the push-pull rod 3. One bearing is pressed into each side. The bearing 8 is set on the stop pin 2. The push-pull rod 3 can rotate around the stop pin 2. The front end of the push-pull rod 3 is provided with a downward pushing arc 31 and an upward pulling arc 32. The tail end of the push-pull rod 3 is engaged with the actuating arm 4. The actuating arm 4 is mounted on the square shaft 94 of the current receiver and rotates with the current receiver arm 91. The rotating groove 11 of the retraction base 1 and both sides of the push-pull rod 3 are provided with tension spring pins 5. Retraction springs 6 are connected to the tension spring pins 5, that is, there are retraction springs 6 on both sides. The head of the retraction spring 6 is provided with a flat surface to facilitate tightening with a wrench. One end of the retraction spring 6 is connected to the tension spring pin 5 on the rotating groove 11, and the other end is connected to the tension spring pin 5 on the push-pull rod 3. When the push-pull rod 3 is moved, the push-pull rod 3 can fix the actuating arm 4 in the upper or lower locking position under the pulling force of the retraction spring 6. The retraction base 1 is provided with a stop part 7 for adjusting the stop position of the push-pull rod 3. The stop part 7 includes an adjusting screw 71 and an adjusting nut 72. The adjusting nut 72 is screwed onto the adjusting screw 71, and then the adjusting screw 71 is screwed into the retraction base 1. The adjusting screw 71 can adjust the locking position, and thus the height of the carbon slipper 92 can be adjusted.

[0029] The following will refer to Figures 1 to 6 The working principle of this utility model will be explained.

[0030] The push-pull rod 3 rotates around the stop pin 2. The bearing 8 is in the middle to isolate the metal-to-metal friction between the push-pull rod 3 and the stop pin 2 and reduce friction. The push-pull rod 3 is provided with a lower push arc 31 and an upper pull arc 32. The push-pull rod 3 rotates in the rotation groove 11 of the return base 1. When the lower push arc 31 is pushed down, the push-pull rod 3 stops after hitting the adjusting screw 71 under the pulling force of the return tension spring 6.

[0031] Pushing the current receiving arm 91 causes the actuating arm 4 to rotate downwards. The end of the actuating arm 4 contacts the end of the push-pull rod 3 and pushes the push-pull rod 3 to rotate downwards until it passes the push-pull rod 3. Under the force of the return spring 6, the push-pull rod 3 automatically returns to its original stop position. The current receiving arm 91 is released, and under the action of the current receiver's elastic mechanism, the current receiving arm 91 drives the actuating arm 4 to rotate and stop at the end of the push-pull rod 3, thus completing the current receiver's shoe lowering operation.

[0032] When the upward pull arc 32 is pulled upward, the end of the push-pull rod 3 drives the actuating arm 4 to rotate until the two separate. The bent part of the push-pull rod 3 contacts the upper edge of the rotating groove 11 of the return base 1 and stops. The current receiving arm 91 automatically resets under the action of the current receiving spring mechanism, and the actuating arm 4 also returns to its original position with the rotating current receiving arm 91, realizing the shoe lifting operation.

[0033] This utility model discloses an easy-pull retraction device with a stop pin. Using an insulated tool at the train door, the device can be operated to detach and retract the carbon slipper. Pushing down the push-pull rod and pressing down the current-receiving arm detaches the slipper, while pulling up the push-pull rod resets it. It is time-saving, labor-saving, and easy to operate. The locking height can be adjusted by rotating the adjusting screw, thus adjusting the detachment position of the carbon slipper. It can also be locked with an adjusting nut, making it simple, convenient, and highly versatile. The stop pin uses a positioning plate on one side to prevent detachment and a fan-shaped stop on the other side, providing double-sided detachment prevention for safety and reliability.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A push-pull type retraction device with a stop pin, characterized in that, The device includes a retractable base connected to the current receiver. A rotating groove is formed on the retractable base, and a stop pin is installed on the rotating groove. A push-pull rod is connected to the stop pin and can rotate. The front end of the push-pull rod is provided with a downward pushing arc and an upward pulling arc. The tail end of the push-pull rod is engaged with a toggle arm. The rotating groove of the retractable base and both sides of the push-pull rod are provided with tension spring pins. Retractable tension springs are connected to the tension spring pins. The retractable base is provided with a stop part for adjusting the stop position of the push-pull rod.

2. The push-pull type retraction device with a stop pin according to claim 1, characterized in that, The stop mechanism includes an adjusting screw and an adjusting nut.

3. The push-pull type retraction device with a stop pin according to claim 1, characterized in that, The push-pull rod contains a bearing, which is mounted on the stop pin.

4. The easy-pull retraction device with a stop pin according to claim 1, characterized in that, A positioning piece is provided on one side of the stop pin, which engages with the stop pin and is locked in place by a positioning screw.

5. The push-pull type retraction device with a stop pin according to claim 1, characterized in that, The actuating arm is mounted on the square shaft of the current receiver.

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