A pushing device for overhead contact line operation ladders on electrified railways

Abstract

This utility model discloses a pushing device for an electrified railway catenary work ladder car, comprising: a frame, with wheels I rotatably connected to both sides of the frame, and further comprising: a locking assembly and a braking assembly; wherein, the wheels I on both sides of the frame cooperate with the wheels of the ladder car after it is folded down to push the ladder car on the rail; an arc-shaped connecting rod is provided on the connecting rod of the frame near one of the wheels I; the connecting rod of the frame and the arc-shaped connecting rod cooperate to make the frame have an "h" structure in space; a wheel II is provided on the end face of the arc-shaped connecting rod to cooperate with one of the wheels I, and the wheel I at the end away from the wheel II is configured as a brake wheel of the braking assembly. This utility model can fix the ladder car after it is folded down through the locking assembly, so that the overall height of the ladder car is lower during the pushing process, making the pushing process safer; at the same time, the three-wheeled frame with the H-shaped structure ensures the stability of the mounting plane of the locking assembly, and the structure is also lighter.

Description

Technical Field

[0001] This utility model belongs to the field of overhead contact line construction, maintenance and emergency repair technology, and specifically relates to an electrified railway ladder car pushing device. Background Technology

[0002] The ladder truck plays a crucial role in overhead contact line construction. It is one of the essential pieces of equipment for railway electrification construction and maintenance, and an indispensable specialized tool in the process. During the daily construction and maintenance of the overhead contact line, it provides workers with a necessary working platform equipped with safety railings. Almost all overhead contact line construction work requires this tool. This tool is generally a truss structure, made of materials including aluminum alloy, steel, insulating rods, and wood. It is large, tall, and heavy, occupying an area of ​​approximately 1.5 x 3 meters, with a height between 5 and 6 meters, and weighing around 100 kg. Due to its structural characteristics, with four wheels at the bottom, the ladder truck reaches a height of 5 to 6 meters when pushed on the track, posing a risk of tipping over during the process.

[0003] Due to their frequent use and long distances to work sites, there are safety risks during the transfer and pushing process. Existing devices typically secure the ladder cart when it is stationary to prevent it from tipping over, but it is usually not secured during transport. This leads to the risk of the tall ladder cart tipping over during pushing. For example, the anti-tipping ladder cart disclosed in patent application number 202120593068.0 only secures the ladder cart when it is stationary and cannot solve the risk of tipping over during pushing. Utility Model Content

[0004] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0005] In order to achieve these objectives and other advantages of the present invention, an electrified railway catenary work ladder car pushing device is provided, comprising: a frame, wherein wheels I that cooperate with the rail are rotatably connected to both sides of the frame, and further comprising: a locking assembly disposed on the frame and fixing the work platform of the ladder car after it is laid down, and a brake assembly disposed on one side of the locking assembly;

[0006] The wheels I on both sides of the frame cooperate with the wheels of the folded ladder car to push the ladder car on the rails. An arc-shaped connecting rod is provided near one of the wheels I on the frame. The connecting rod and the arc-shaped connecting rod cooperate to make the frame have an "h" structure in space. A wheel II is provided on the end face of the arc-shaped connecting rod to cooperate with one of the wheels I on the frame. The wheel I at the end away from the wheel II is configured as a brake wheel of the brake assembly.

[0007] Preferably, the locking assembly includes: a pair of L-shaped limiting members disposed on the surface of the connecting rod of the frame and cooperating with the vertical beam of the work platform of the ladder truck; and a vertical clamp disposed on one side of each L-shaped limiting member and abutting against the surface of the vertical beam of the work platform of the ladder truck.

[0008] Preferably, the brake assembly includes: a brake lever;

[0009] Connector I and connector II are respectively set on different horizontal planes of the connecting rod of the frame. The brake lever is rotatably connected to connector I. A transmission component that spatially cooperates with the brake lever is rotatably set on connector II.

[0010] A mounting component located on one side of connector II and at the same horizontal plane as connector II; a brake shaft passing through the mounting component and cooperating with the brake wheel; and a return spring located inside the mounting component and sleeved on the outside of the brake shaft.

[0011] An adjusting screw is installed between the brake shaft and the transmission component;

[0012] The adjusting screw is rotatably connected to the brake shaft and the transmission component at both ends, respectively. The lower surface of the other end of the transmission component abuts against the outer surface of the lower end of the brake lever. The outer surface of the brake shaft is provided with a stop bar that cooperates with a return spring. One end of the return spring abuts against the inner side wall of the mounting component, and the other end abuts against the stop bar.

[0013] Preferably, the contact surface between the brake wheel and the brake shaft is provided with a plurality of brake holes along the circumferential direction for the brake shaft to extend into.

[0014] Preferably, a limiting rod is provided on the front end face of the connector I to limit the rotation angle of the brake lever.

[0015] Preferably, the brake lever is configured as a two-section structure and is connected by a hinge so that it is parallel to the connecting rod of the frame when the upper end of the brake lever is retracted.

[0016] The lower end of the brake lever is hinged to the connecting rod I at hinge point I, and the lower end of the brake lever is hinged to the upper end of the brake lever at hinge point II. Hinge point II is located above hinge point I, and the hinge directions of hinge point I and hinge point II are perpendicular to each other in space. The system also includes a tension spring mounted on the brake lever, with its two ends located on both sides of the hinge point of the brake lever.

[0017] Preferably, the rear end of the brake lever is provided with a bent push handle.

[0018] The present invention has at least the following beneficial effects: The present invention can fix the ladder cart after it is laid down by the locking component, so that the overall height of the ladder cart is lower during the pushing process and the pushing process is safer. At the same time, the three-wheeled frame with the H-shaped structure not only ensures the stability of the mounting plane of the locking component, but also makes the structure lighter.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating the coordination between the pushing device and the ladder car for pushing along the track;

[0021] Figure 2 A schematic diagram of the overall structure of the device;

[0022] Figure 3 This is a structural diagram of the locking component;

[0023] Figure 4 This is a schematic diagram of the frontal spatial structure of the brake assembly;

[0024] Figure 5 This is a schematic diagram of the rear spatial structure of the brake assembly.

[0025] Reference numerals: 1. Ladder car, 2. Rail, 3. Frame, 31. Connecting rod, 32. Arc-shaped connecting rod, 4. Wheel I, 41. Brake wheel, 5. Wheel II, 6. Locking assembly, 61. L-shaped limiter, 62. Vertical clamp, 7. Brake assembly, 71. Brake lever, 72. Connector I, 73. Connector II, 74. Transmission component, 75. Mounting component, 76. Brake shaft, 77. Return spring, 78. Adjusting screw, 79. Stop bar, 8. Brake hole, 9. Tension spring, 10. Bent push handle, 11. Limiter rod. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description. It should be understood that terms such as "having," "comprising," and "including" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof. It should be noted that in the description of the present invention, the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element 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 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. In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "on top" can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] like Figure 1 The above describes a catenary work ladder pushing device for electrified railways, which includes: a frame 3, with wheels I4 rotatably connected to both sides of the frame 3 to cooperate with the rails 2; a locking assembly 6 mounted on the frame 3 to fix the work platform of the ladder 1 after it is laid down; and a brake assembly 7 mounted on one side of the locking assembly 6.

[0028] The wheels I4 on both sides of the frame 3 cooperate with the wheels of the ladder car 1 after it is laid down to push the ladder car 1 on the rail 2. The connecting rod 31 of the frame 3 is provided with an arc-shaped connecting rod 32 near one of the wheels I4. The connecting rod 31 and the arc-shaped connecting rod 32 cooperate to make the frame 3 have an "h" structure in space. The end face of the arc-shaped connecting rod 32 is provided with a wheel II5 that cooperates with one of the wheels I4. The wheel I4 at the end away from the wheel II5 is configured to be the brake wheel 41 of the brake assembly 7.

[0029] Working principle:

[0030] During the preparation phase, four workers are assigned to lower the ladder cart 1. Since the weight of the ladder cart 1 is mainly concentrated at the bottom, the workers need to fix one side of the wheels and lift the other side. The ladder cart 1 rotates around the fixed side wheel, and the four workers gradually lower one end of the work platform until it is placed on the pushing device. After the ladder cart 1 is manually lowered, the work platform is fixed to the frame 3 using locking assembly 6. The front frame of the work platform fits against the rear surface of the frame 3, and the locking assembly 6 firmly secures the work platform to the frame 3. During the pushing phase, the wheels I4 on both sides of the frame 3 and the wheels of the lowered ladder cart 1 are stably placed on the rails 2. The operator then pushes the frame 3 or the ladder cart... The workbench of 1 has wheels I4 rolling along rail 2, which drives the ladder cart 1 to move on rail 2. Wheel II5, which is set on rail 2 and cooperates with wheels I4 via arc-shaped connecting rod 32, makes the frame 3 have an H-shaped structure in space. The three-point support structure also ensures that the mounting plane of the locking component 6 on the frame 3 is more stable. At the same time, when the ladder cart 1 moves to the predetermined position, the movement of the ladder cart 1 is stopped by controlling the cooperation of the brake component 7 and the brake wheel 41. This utility model can fix the ladder cart 1 after it is folded down by locking component 6, so that the overall height of the ladder cart 1 is lower during the pushing process and the pushing process is safer. At the same time, the three-wheeled frame 3 with H-shaped structure not only ensures the stability of the mounting plane of the locking component 6, but also makes the structure lighter.

[0031] In the above technical solution, the locking component 6 includes: L-shaped limiting members 61 paired on the surface of the connecting rods 31 of the frame 3 and cooperating with the vertical beam of the worktable of the ladder truck 1; and vertical clamps 62 disposed on one side of each L-shaped limiting member 61 and abutting against the surface of the vertical beam of the worktable of the ladder truck 1. Using this technical solution, the paired L-shaped limiting members 61 precisely cooperate with the vertical beam of the worktable, limiting the horizontal displacement of the vertical beam. The vertical clamps 62 exert a vertical clamping force on the surface of the vertical beam of the worktable of the ladder truck 1. When the workbench is in contact with the upper surface of the L-shaped limiting part 61 of the connecting rod 31 of the frame 3, the pair of clamps tighten synchronously from both sides. By manually pressing the handle of the vertical clamp 62, the vertical clamp 62 can fix the vertical beam of the ladder 1. To release, simply pull the handle to unlock. The clamping end of the vertical clamp 62 is made of elastic materials such as rubber pads, which can ensure the clamping force while avoiding scratches on the surface of the workbench.

[0032] In the above technical solution, the brake assembly 7 includes: a brake lever 71;

[0033] Connector I 72 and connector II 73 are respectively set on different horizontal planes of the connecting rod 31 of the frame 3. The brake lever 71 is rotatably connected to connector I 72. A transmission component 74 that spatially cooperates with the brake lever 71 is rotatably set on connector II 73.

[0034] A mounting part 75 is provided on one side of the connector II 73 and is located on the same horizontal plane as the connector II 73; a brake shaft 76 is passed through the mounting part 75 and cooperates with the brake wheel 41; and a return spring 77 is provided inside the mounting part 75 and sleeved on the outside of the brake shaft 76.

[0035] An adjusting screw 78 is provided between the brake shaft 76 and the transmission component 74;

[0036] The adjusting screw 78 is rotatably connected to the brake shaft 76 and the transmission component 74 at both ends, respectively. The lower surface of the other end of the transmission component 74 abuts against the outer surface of the lower end of the brake lever 71. The outer surface of the brake shaft 76 is provided with a stop bar 79 that cooperates with a return spring 77. One end of the return spring 77 abuts against the inner side wall of the mounting component 75, and the other end abuts against the stop bar 79. Using this technical solution, when braking is required, the operator releases the brake lever 71, which rotates to connect with the connecting piece I 72. The brake lever 71 rotates around the connection point, and its lower outer surface separates from the lower surface of the other end of the transmission piece 74. The transmission piece 74, through the adjusting screw 78, no longer applies tension to the brake shaft 76. The return spring 77 recovers from its compressed state. Through the action of the inner wall of the mounting piece 75 and the stop bar 79, the return spring 77 causes the brake shaft 76 to move axially along the mounting piece 75 and contact the brake wheel 41 on one side (the wheel I 4 on one side is configured as the brake wheel 41, and the contact surface between the brake wheel 41 and the brake shaft 76 has multiple brake holes 8 along the circumferential direction for the brake shaft 76 to penetrate). The brake shaft 76 then penetrates into the brake holes 8 of the wheel I 4, thus braking the wheel I 4. The pushing device moves the ladder trolley 1 at a speed of 5 kilometers per hour. The low-speed movement of the brake shaft 76 penetrating into the brake holes 8 will not affect the structural strength. When the ladder cart 1 needs to be pushed, the operator rotates the brake lever 71 backward. The brake lever 71 is rotatably connected to the connecting part I 72. The brake lever 71 will rotate around the connection point, and its lower outer surface will press against the lower surface of the other end of the transmission part 74, forcing the transmission part 74 to rotate around the connection point with the connecting part II 73. When the transmission part 74 rotates, its other end pulls the brake shaft 76 through the adjusting screw 78, causing the brake shaft 76 to be pulled out of the brake hole 8, releasing the braking state of the pushing device.

[0037] When not being pushed, the brake shaft 76 automatically resets under the action of the return spring 77 and inserts into the brake hole 8 to achieve braking, ensuring safety during the pushing process.

[0038] In the above technical solution, a limiting rod 11 is provided on the front end face of the connecting member I 72 to limit the rotation angle of the brake lever 71. With this technical solution, the limiting rod 11 directly limits the maximum rotation angle of the brake lever 71 through mechanical obstruction. When the operator pushes the brake lever 71, the brake lever 71 rotates around the rotation axis of the connecting member I 72 until the side of the brake lever 71 contacts the limiting rod 11, at which point the brake lever 71 can no longer rotate. This avoids excessive rotation of the brake lever 71 due to excessive force applied by the operator, thus preventing damage to the transmission component 74.

[0039] In the above technical solution, the brake lever 71 is configured as a two-section structure and is connected by a hinge so that when the upper end of the brake lever 71 is stored, it is parallel to the connecting rod 31 of the frame 3.

[0040] The lower end of the brake lever 71 is hinged to the connecting rod 31Ⅰ at hinge point Ⅰ, and the lower end of the brake lever 71 is hinged to the upper end of the brake lever 71 at hinge point Ⅱ. Hinge point Ⅱ is located above hinge point Ⅰ, and the hinge directions of hinge point Ⅰ and hinge point Ⅱ are perpendicular to each other in space. The system also includes a tension spring 9 disposed on the brake lever 71, with the two ends of the tension spring 9 located on both sides of the hinge point of the brake lever 71. With this technical solution, when not in use, the two-section articulated brake lever 71 can be folded and parallel to the connecting rod 31 of the frame 3, reducing spatial interference with other equipment. The hinge point II is located above the hinge point I, preventing the hinge point II from interfering with the hinge point I when folding. At the same time, the tension spring 9 ensures that the articulated brake lever 71 will not wobble in space when it is in the retracted state. When the brake lever 71 needs to be unfolded, the rebound force of the tension spring 9 will help the two sections of the brake lever 71 automatically return to the working angle, eliminating the need for manual precise alignment and improving operational efficiency.

[0041] In the above technical solution, a bent push handle 10 is provided at the rear end of the brake lever 71. With this technical solution, the installation angle of the push handle is perpendicular to the frame 3. The operator stands at the rear end of the frame 3, with his palm in contact with the gripping surface of the push handle, and the direction of the force exerted by his arm is perpendicular to the length direction of the frame 3, which makes it convenient for the operator to apply pushing force to the brake lever 71.

[0042] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A catenary pushing device for electrified railway overhead contact line operations, comprising: A frame, wherein wheels I that cooperate with rails are rotatably connected to both sides of the frame, characterized in that it further includes: a locking assembly disposed on the frame and for fixing the work platform of the folded-down ladder car, and a brake assembly disposed on one side of the locking assembly; The wheels I on both sides of the frame cooperate with the wheels of the folded ladder car to push the ladder car on the rails. An arc-shaped connecting rod is provided near one of the wheels I on the frame. The connecting rod and the arc-shaped connecting rod cooperate to make the frame have an "h" structure in space. A wheel II is provided on the end face of the arc-shaped connecting rod to cooperate with one of the wheels I on the frame. The wheel I at the end away from the wheel II is configured as a brake wheel of the brake assembly.

2. The electrified railway catenary operation ladder cart pushing device according to claim 1, characterized in that, The locking assembly includes: a pair of L-shaped limiting members disposed on the surface of the connecting rod of the frame and cooperating with the vertical beam of the work platform of the ladder truck; and a vertical clamp disposed on one side of each L-shaped limiting member and abutting against the surface of the vertical beam of the work platform of the ladder truck.

3. The catenary pushing device for electrified railway overhead contact line operations according to claim 1, characterized in that, The braking assembly includes: a brake lever; Connector I and connector II are respectively set on different horizontal planes of the connecting rod of the frame. The brake lever is rotatably connected to connector I. A transmission component that spatially cooperates with the brake lever is rotatably set on connector II. A mounting component located on one side of connector II and at the same horizontal plane as connector II; a brake shaft passing through the mounting component and cooperating with the brake wheel; and a return spring located inside the mounting component and sleeved on the outside of the brake shaft. An adjusting screw is installed between the brake shaft and the transmission component; The adjusting screw is rotatably connected to the brake shaft and the transmission component at both ends, respectively. The lower surface of the other end of the transmission component abuts against the outer surface of the lower end of the brake lever. The outer surface of the brake shaft is provided with a stop bar that cooperates with a return spring. One end of the return spring abuts against the inner side wall of the mounting component, and the other end abuts against the stop bar.

4. The electrified railway catenary operation ladder cart pushing device according to claim 3, characterized in that, The contact surface between the brake wheel and the brake shaft is provided with multiple brake holes along the circumferential direction for the brake shaft to extend into.

5. The electrified railway catenary operation ladder cart pushing device according to claim 3, characterized in that, A limiting rod is provided on the front end face of the connector I to limit the rotation angle of the brake lever.

6. The electrified railway catenary operation ladder cart pushing device according to claim 3, characterized in that, The brake lever is configured as a two-section structure and is connected by a hinge so that it is parallel to the connecting rod of the frame when the upper end of the brake lever is retracted. Wherein, the lower end of the brake lever is hinged to the connecting rod I at hinge point I, and the lower end of the brake lever is hinged to the upper end of the brake lever at hinge point II. Hinge point II is located above hinge point I, and the hinge directions of hinge point I and hinge point II are perpendicular to each other in space.

7. The electrified railway catenary operation ladder cart pushing device according to claim 6, characterized in that, Also includes: A tension spring is mounted on the brake lever, with its two ends located on either side of the brake lever hinge.

8. The electrified railway catenary operation ladder cart pushing device according to claim 3, characterized in that, The brake lever has a bent push handle at its rear end.

Images