Traction device and equipment for a dolly

Abstract

The application relates to the rail transit technical field and discloses a traction device and equipment of a pay-off trolley, which comprises a moving mechanism and a limiting mechanism. The moving mechanism is used for connecting a winch and is movably connected with a busbar and can move along the length direction of the busbar. The limiting mechanism acts on the busbar and the moving mechanism and is used for limiting the moving mechanism when the moving mechanism moves to a predetermined position on the busbar and preventing the moving mechanism from moving to the limiting direction close to the pay-off trolley. The traction device of the pay-off trolley can save a large number of dismounting and carrying operations of the winch and can improve the pay-off efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, and in particular to a traction device and equipment for a pay-off trolley. BACKGROUND

[0002] At present, the power transmission mode used by the subway, light rail and other urban traffic networks in most areas of China is the traditional third rail power supply mode. Recently, a new power transmission mode has appeared in some areas in China: rigid catenary power supply. The fifth paragraph of the local replacement trial process for the contact wire of the rigid catenary in the standard GDY / QW-WXⅡ08-042-011 stipulates that the local replacement or installation of the contact wire of the rigid catenary uses a pay-off trolley and other tools. In order to facilitate the orderly arrangement of the contact wire, the contact wire is usually accommodated in a busbar, as shown in FIG. 1, which is surrounded by a top plate and two side plates. The outer sides of the two side plates form two wing plates, the lower parts of the two side plates are bent inward to form a bayonet, the upper parts of the wing plates are flat, and the lower parts of the wing plates form wheel grooves. The contact wire is accommodated in the space surrounded by the top plate and the two side plates. In order to be able to disassemble and assemble the contact wire from the busbar, the running wheels of the pay-off trolley are lapped on the wing plates, and the front and rear pairs of tensioning wheels are respectively embedded in the wheel grooves in the lower parts of the two wing plates. When it is necessary to disassemble and assemble the contact wire, the distance between the two tensioning wheels of each pair of tensioning wheels is increased to increase the opening of the bayonet, and the contact wire in the busbar will be pulled out of the bayonet or the contact wire will be pulled into the busbar from the outside of the busbar through the bayonet, thereby realizing the disassembly and assembly of the contact wire. Figure 1

[0003] In order to realize the continuous disassembly and assembly of the contact wire by the pay-off trolley, the pay-off trolley needs to be pulled to move on the busbar. At present, the construction site usually installs a winch at a certain distance in the direction of movement of the pay-off trolley, and pulls the pay-off trolley to move. When the pay-off trolley moves to the vicinity of the winch, the winch is disassembled and carried to a position away from the pay-off trolley by a certain distance, and the winch is reinstalled on the busbar, and the pay-off trolley is continuously pulled. It can be seen that the current traction scheme for the pay-off trolley involves a large number of repeated disassembly, installation and carrying operations of the winch, and the pay-off efficiency is low. SUMMARY

[0004] The purpose of the present application is to make up for the shortcomings of the prior art, and to provide a traction device and equipment for a pay-off trolley, which eliminates the disassembly and carrying operations of the winch and can improve the pay-off efficiency.

[0005] In order to solve the above technical problems, the present application adopts the following technical scheme:

[0006] ​In a first aspect, the application provides a traction device for a wire laying trolley, which comprises a moving mechanism and a limiting mechanism. The moving mechanism is used to connect a winch and movably connect with a busbar and move along the length direction of the busbar. The limiting mechanism acts on the busbar and the moving mechanism, and is used to limit the moving mechanism when the moving mechanism moves to a predetermined position on the busbar, and prevent the moving mechanism from moving to a limiting direction close to the wire laying trolley.

[0007] Further, the limiting mechanism is a one-way limiting mechanism, which is used to prevent the moving mechanism from moving to the limiting direction relative to the busbar, and allow the moving mechanism to move to a direction opposite to the limiting direction relative to the busbar.

[0008] Further, the traction device for the wire laying trolley further comprises a one-way limiting releasing assembly, which is connected to a fixed part of the moving mechanism, and is used to act on the one-way limiting mechanism to allow the moving mechanism to move to the limiting direction relative to the busbar.

[0009] Further, the one-way limiting mechanism comprises a limiting assembly, which comprises a limiting support, a limiting swing arm and a pressing member. The limiting support is used to be embedded into a wheel groove on the lower side of a wing plate of the busbar when the moving mechanism is movably connected to the busbar. The first end of the limiting swing arm is rotatably connected to the fixed part of the moving mechanism, and the second end of the limiting swing arm is rotatably connected to the limiting support. The second end of the limiting swing arm is used to be deflected away from the vertical direction to the limiting direction by the limiting support under the extrusion of the busbar to the limiting support. When the limiting swing arm is perpendicular to the wing plate of the busbar, the direction of the length extension of the limiting swing arm is the vertical direction. The pressing member is connected to the fixed part of the moving mechanism, and is used to act on the limiting swing arm and apply an opposite force to the limiting swing arm to the limiting direction, so that the limiting support presses against the busbar.

[0010] Further, the pressing member comprises an elastic pressing member, which is deformed under the action of the limiting swing arm when the limiting swing arm is deflected to the limiting direction.

[0011] Further, the traction device for the wire laying trolley further comprises an elastic pressing releasing assembly, which is connected to the fixed part of the moving mechanism, and is used to resist the elastic pressing member to push the limiting support and / or the limiting swing arm to the limiting direction, so that the one-way limiting mechanism allows the moving mechanism to move to the limiting direction relative to the busbar.

[0012] Further, the limiting support comprises a rigid pressing member, which comprises:

[0013] a rotating shaft, rotatably connected to a fixed part of the moving mechanism;

[0014] a driving member, acting on the rotating shaft, for driving the rotating shaft to rotate;

[0015] an eccentric arc-shaped disc, fixedly connected to the rotating shaft and located at a side of the limiting swing arm close to the limiting direction, the eccentric arc-shaped disc having an arc-shaped side, the axis of the arc-shaped side being parallel to the axis of the rotating shaft, the eccentric arc-shaped disc being used to rotate under the driving of the rotating shaft and to make the arc-shaped side contact the limiting swing arm until abutting against the limiting swing arm in the process of rotation.

[0016] Further, the driving member is a handheld rotating arm installed on the rotating shaft.

[0017] Further, the driving member is a motor installed on the rotating arm.

[0018] Further, the upper surface of the limiting support member for abutting against the busbar is provided with sawteeth, the sawteeth being inclined to the limiting direction.

[0019] Further, the sawteeth cover part or all of the upper surface of the limiting swing arm.

[0020] Further, the limiting assembly comprises one limiting support member, at least two limiting swing arms and at least two abutting members, the at least two limiting swing arms being arranged along the limiting direction, and each of the at least two abutting members acting on at least one of the limiting swing arms.

[0021] Further, the one-way limiting mechanism comprises two groups of the limiting assembly, the limiting support members of the two groups of the limiting assembly being respectively used to be embedded in the wheel grooves under the two wing plates of the busbar.

[0022] Further, the maximum distance from the axis of the limiting swing arm rotatably connected to the moving mechanism to the upper surface of the limiting support member for abutting against the busbar is L1max, the distance from the axis of the limiting swing arm rotatably connected to the moving mechanism to the contact surface of the moving mechanism for contacting the busbar is L2, and the thickness of the wing plate of the busbar at the wheel groove is L3, L1max+L3>L2.

[0023] Further, the moving mechanism comprises a rack and two groups of guide wheels, the guide wheels being rotatably connected to the rack, and the two groups of the guide wheels being respectively used to be hung on the wing plates on the two sides below the busbar and to roll along the wing plates.

[0024] Further, the guide wheels are movably connected to the rack, and the guide wheels can move relative to the rack along the direction of the axis of the guide wheels.

[0025] Further, the moving assembly further comprises a guide shaft, which is connected with the guide wheel and is threadedly connected with the rack.

[0026] Further, the minimum axial distance between the two groups of guide wheels is greater than or equal to the maximum distance perpendicular to the side plate on the busbar.

[0027] Further, the moving assembly further comprises a guide driving member, which is connected with the guide wheel and is used to drive the guide wheel to rotate.

[0028] Further, the rack comprises two installation plates arranged side by side and a connecting member connecting the two installation plates, and the two groups of guide wheels are respectively installed on the two installation plates.

[0029] In the second aspect, the application further provides a traction device of a pay-off trolley, which comprises a winch and the traction device of the pay-off trolley according to any one of the first aspect, and the winch is fixedly connected to the moving mechanism of the traction device of the pay-off trolley.

[0030] The traction device of the pay-off trolley provided by the application can drive the winch to move on the busbar, and cooperate with the limiting mechanism to limit the winch at a certain position on the busbar, so as to pull the pay-off trolley at the position, and after traction is completed, the winch is continuously moved by the moving mechanism. Therefore, the operation of carrying and disassembling the winch from the busbar is omitted, the workload of the operator is effectively reduced, and the pay-off efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to make the advantages of the application more easily understood, the application briefly described above will be described in more detail by referring to the specific embodiments shown in the drawings. It should be understood that these drawings only depict typical embodiments of the application and therefore should not be considered as limiting the scope of protection, and the application is described and explained in additional characteristics and details by means of the drawings.

[0032] Figure 1 A structural schematic diagram of a busbar provided by the application;

[0033] Figure 2 A structural schematic diagram of a traction device of a pay-off trolley provided by the application installed on a busbar;

[0034] Figure 3 A structural schematic diagram of a traction device of a pay-off trolley provided by the application;

[0035] Figure 4 A sectional structural schematic diagram of a traction device of a pay-off trolley provided by the application;

[0036] Figure 5 Another cross-sectional structure schematic diagram of a traction device of a pay-off trolley provided in the present application is shown in the figure;

[0037] Figure 6 An L1 and L3 size schematic diagram of a traction device of a pay-off trolley provided in the present application is shown in the figure;

[0038] Figure 7 An L2 size schematic diagram of a traction device of a pay-off trolley provided in the present application is shown in the figure;

[0039] Figure 8 An L 1max size schematic diagram of a traction device of a pay-off trolley provided in the present application is shown in the figure.

[0040] The reference signs are as follows:

[0041] 100, moving mechanism; 110, rack; 111, mounting plate; 112, connecting piece; 120, guide wheel; 130, guide shaft;

[0042] 200, limiting mechanism; 300, limiting assembly; 310, limiting support; 311, sawtooth; 320, limiting swing arm; 330, abutting piece; 331, elastic abutting piece; 332, rigid abutting piece; 333, rotating shaft; 334, driving piece; 335, eccentric arc-shaped disc; 336, arc-shaped side surface;

[0043] 400, one-way limiting release assembly; 410, elastic abutting release assembly; 411, through hole; 412, pulling structure;

[0044] 500, busbar; 510, wing plate; 520, wheel groove; 530, side plate;

[0045] 600, winch. DETAILED DESCRIPTION

[0046] In the following description, numerous specific details are given to provide a thorough understanding of the application. However, it will be apparent to one of ordinary skill in the art that the application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail to avoid obscuring aspects of the application.

[0047] To thoroughly understand the embodiments of the present application, detailed structures will be presented in the following description. It is obvious that the implementation of the embodiments of the present application is not limited to the special details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can have other embodiments.

[0048] In the description of this application, the term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "a" or "this" can also include plural forms. The terms "inner side," "outer side," "longitudinal," "lateral," "upper," "lower," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and do not require this application to be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] The embodiments of this application will be described in further detail below with reference to the accompanying drawings:

[0050] Firstly, please refer to Figures 1-8 This application provides a traction device for a wire-feeding trolley, which includes a moving mechanism 100 and a limiting mechanism 200. The moving mechanism 100 is used to connect to a winch 600, is movably connected to a busbar 500, and can move along the length of the busbar 500. The limiting mechanism 200 acts on the busbar 500 and the moving mechanism 100 to limit the moving mechanism 100 when it moves to a predetermined position on the busbar 500, preventing the moving mechanism 100 from moving towards the limiting direction of the wire-feeding trolley.

[0051] This should be understood and can be used as a reference. Figure 4 Understanding the limiting direction: The X direction indicated in the figure is the limiting direction. The direction that approaches the wire feeding trolley is defined as the limiting direction to show that the limiting mechanism 200 can prevent the moving mechanism 100 from moving toward the wire feeding trolley. This ensures that when the winch 600 pulls the wire feeding trolley, it can be locked on the busbar 500 by the limiting mechanism 200 and will not approach the wire feeding trolley, thus ensuring effective and stable pulling of the wire feeding trolley for wire feeding operations.

[0052] In the implementation process, the mobile mechanism 100 is configured to drive the winch 600 to move along the busbar 500, thereby avoiding the operation of carrying the winch 600 by the operator, reducing the labor intensity of the operator, and effectively improving the efficiency of the wire laying. After the mobile mechanism 100 drives the winch 600 to move to a certain distance from the wire laying trolley, the limiting mechanism 200 can be used to prevent the mobile mechanism 100 from moving in the limiting direction close to the wire laying trolley, so that the winch 600 can perform subsequent traction operation. When the winch 600 needs to be repositioned after the wire laying trolley is pulled to the vicinity, the limiting mechanism 200 can be released or disassembled, or the mobile mechanism 100 can be directly pushed to move in the direction opposite to the limiting direction, thereby pulling the winch 600 away from the wire laying trolley and performing the next wire laying operation.

[0053] As can be seen, the traction device of the wire laying trolley provided by the present application can drive the winch 600 to move along the busbar 500, and cooperate with the limiting mechanism 200 to limit the winch 600 at a certain position on the busbar 500, and perform traction on the wire laying trolley at the position. After the traction is completed, the winch 600 is continuously moved by the mobile mechanism 100. Therefore, the operation of carrying the winch 600 and disassembling the winch 600 from the busbar 500 is omitted, the workload of the operator is effectively reduced, and the wire laying efficiency is improved.

[0054] Alternatively, the limiting mechanism 200 can be a detachable component such as a bolt or a positioning pin, which penetrates through the mounting hole on the mobile mechanism 100 and abuts against the busbar 500, thereby locking the mobile mechanism 100 and the winch 600 on the busbar 500.

[0055] In a possible implementation, the limiting mechanism 200 is a one-way limiting mechanism 200, which is used to prevent the mobile mechanism 100 from moving in the limiting direction relative to the busbar 500 and allow the mobile mechanism 100 to move in the direction opposite to the limiting direction relative to the busbar 500.

[0056] In the implementation process, after the mobile mechanism 100 is limited by the one-way limiting mechanism 200, the mobile mechanism 100 cannot move in the limiting direction, and the traction operation of the winch 600 on the wire laying trolley can be realized. However, the mobile mechanism 100 is allowed to move away from the wire laying trolley, that is, after the winch 600 completes the traction of the wire laying trolley by a certain distance, the mobile mechanism 100 can be directly pushed to move away from the wire laying trolley, thereby pulling the mobile mechanism 100 away from the wire laying trolley and performing the next traction without the operation of releasing or disassembling the limiting mechanism 200. As can be seen, by limiting the mobile mechanism 100 by the one-way limiting mechanism 200, the operation of the limiting mechanism 200 during the wire laying process can be directly omitted, and the winch 600 can realize the traction on the wire laying trolley by a plurality of distances by only pushing the mobile mechanism 100, thereby greatly simplifying the wire laying operation and improving the wire laying efficiency.

[0057] In a possible implementation, the traction device of the cable laying trolley further comprises a one-way limiting release assembly 400 connected to the fixed part of the moving mechanism 100, configured to act on the one-way limiting mechanism 200 to allow the moving mechanism 100 to move relative to the busbar 500 in the limiting direction.

[0058] In the above implementation, in the actual cable laying operation, sometimes the winch 600 is too far away from the cable laying trolley, and needs to be moved in the direction close to the cable laying trolley, i.e. the limiting direction. Therefore, the traction device of the cable laying trolley provided in the present application further comprises a one-way limiting release assembly 400, which can release the limitation of the one-way limiting mechanism 200 on the movement of the moving mechanism 100 in the limiting direction, and allow the moving mechanism 100 to move towards the cable laying trolley, thereby expanding the application scenarios of the traction device of the cable laying trolley, and avoiding the need to disassemble, transport and install the moving mechanism 100 and the winch 600 from the busbar 500 in the above-mentioned situation.

[0059] In a possible implementation, the one-way limiting mechanism 200 comprises a limiting assembly 300, which comprises a limiting support 310, a limiting swing arm 320 and an abutting piece 330. The limiting support 310 is configured to be embedded in the wheel groove 520 on the lower side of the wing plate 510 of the busbar 500 when the moving mechanism 100 is movably connected to the busbar 500. The first end of the limiting swing arm 320 is rotatably connected to the fixed part of the moving mechanism 100, and the second end is rotatably connected to the limiting support 310. The second end of the limiting swing arm 320 is configured to be deflected away from the vertical direction and towards the limiting direction by the limiting support 310 under the extrusion of the busbar 500 on the limiting support 310. When the limiting swing arm 320 is perpendicular to the wing plate 510 of the busbar 500, the direction of the length extension of the limiting swing arm 320 is the vertical direction. The abutting piece 330 is connected to the fixed part of the moving mechanism 100, configured to act on the limiting swing arm 320 and apply a force opposite to the limiting direction to the limiting swing arm 320, so as to make the limiting support 310 abut against the busbar 500.

[0060] It should be understood that the fixed part of the moving mechanism 100 refers to the structure part that is used to be connected with the winch 600 and remains stationary relative to the winch 600 when the moving mechanism 100 moves along the busbar 500. For example, the moving mechanism 100 comprises a rack 110 and two sets of guide wheels 120 rotatably connected to the rack 110, and the two sets of guide wheels 120 are configured to be hung on the wing plates 510 below the two sides of the busbar 500 respectively and roll along the wing plates 510. At this time, the fixed part of the moving mechanism 100 refers to the rack 110 of the moving mechanism 100.

[0061] It should be understood that, Figure 4 The Y direction indicated in the above embodiment is the vertical direction. As shown in the above embodiment, Figure 8 The Y direction indicated in the above embodiment is the vertical direction. As shown in the above embodiment, Figure 6 As shown in the above embodiment, when the limiting swing arm 320 is perpendicular to the wing plate 510 of the busbar 500, i.e., the limiting swing arm 320 is in the vertical direction, the distance L1 between the axis of the rotation connection between the limiting swing arm 320 and the fixed part of the moving mechanism 100 and the upper surface of the limiting support 310 (or the bottom of the wheel groove 520 of the busbar 500, or the upper surface of the wing plate 510 of the busbar 500) is the largest (i.e., L1max as shown in the above embodiment). When the limiting swing arm 320 deviates from the vertical direction to the limiting direction, the larger the angle of deviation, the smaller the L1. Figure 8 As shown in the above embodiment, when the limiting swing arm 320 is perpendicular to the wing plate 510 of the busbar 500, i.e., the limiting swing arm 320 is in the vertical direction, the distance L1 between the axis of the rotation connection between the limiting swing arm 320 and the fixed part of the moving mechanism 100 and the upper surface of the limiting support 310 (or the bottom of the wheel groove 520 of the busbar 500, or the upper surface of the wing plate 510 of the busbar 500) is the largest (i.e., L1max as shown in the above embodiment). When the limiting swing arm 320 deviates from the vertical direction to the limiting direction, the larger the angle of deviation, the smaller the L1.

[0062] In the above embodiment, during the installation of the traction device of the pay-off trolley to the busbar 500, first, the limiting support 310 is aligned with the wheel groove 520 on the lower side of the wing plate 510 of the busbar 500, and the traction device is pushed upward to embed the limiting support 310 into the wheel groove 520, so that the limiting support 310 contacts the bottom or the wall of the wheel groove 520. At this time, the limiting support 310 is perpendicular to the busbar 500 or deviates from the vertical direction to the limiting direction. The traction device is further pushed upward so that the moving part of the moving mechanism 100 can exceed the contact surface of the busbar, and the moving part of the moving mechanism 100 is movably connected to the busbar 500. At this time, the busbar 500 generates a downward extrusion force on the limiting support 310, thereby pushing the limiting swing arm 320 away from the vertical direction and deviating to the limiting direction (i.e., the initial state of the limiting swing arm 320 when not extruded by the busbar 500 may be in the vertical direction, or may deviate from the vertical direction to the limiting direction by a certain angle, and may deviate to a larger angle after extrusion). After the hand is released, the installation is completed.

[0063] After the installation is completed, L1 is smaller than L1 in the initial state, so that the abutting member 330 applies a force to the limiting swing arm 320 in the direction opposite to the limiting direction, and the limiting support 310 is abutted in the wheel groove 520 of the busbar 500.

[0064] When an external force in the limiting direction is applied to the traction device, the busbar 500 generates a friction force in the direction opposite to the limiting direction on the upper surface of the limiting support 310. The friction force drives the limiting support 310 and the limiting swing arm 320 to move or swing in the direction opposite to the limiting direction, or has a movement trend, so that under the action of the external force, the limiting support 310 gradually abuts and locks the busbar 500, so that the moving mechanism 100 cannot move in the limiting direction, i.e., the moving mechanism 100 is prevented from moving in the limiting direction.

[0065] When an external force opposite to the limiting direction is applied to the traction device, the busbar 500 will generate a friction force on the upper surface of the limiting support 310 in the same direction as the limiting direction, which has a tendency to drive the limiting support 310 to move in the limiting direction and drive the limiting support arm to continue to deflect in the limiting direction, and when the friction force between the busbar 500 and the limiting support 310 is less than the external force, the limiting support 310 slides relative to the busbar 500 in a direction opposite to the limiting direction, that is, the moving mechanism 100 moves relative to the busbar 500 in a direction opposite to the limiting direction.

[0066] In summary, the one-way limiting mechanism 200 provided by the present application can realize one-way limiting of the moving mechanism 100, prevent the moving mechanism 100 from moving in the limiting direction, so that the winch 600 can realize traction of the pay-off trolley, and allow the moving mechanism 100 to move in a direction opposite to the limiting direction at any time, so as to adjust the distance between the winch 600 and the pay-off trolley.

[0067] In a possible implementation, the abutting member 330 includes an elastic abutting member 331, which is deformed under the action of the limiting swing arm 320 when the limiting swing arm 320 is deflected in the limiting direction.

[0068] Optionally, the elastic abutting member 331 can be an elastic structure such as a spring or a torsion spring.

[0069] Specifically, when the elastic abutting member 331 is a spring, the spring can be arranged on one side of the limiting swing arm 320 close to or away from the limiting direction.

[0070] In a specific embodiment in which the spring is arranged on the side of the limiting swing arm 320 away from the limiting direction, the two ends of the spring are connected to the limiting swing arm 320 and the fixed part of the moving mechanism 100, respectively. When the traction device is installed, the busbar 500 presses the limiting swing arm 320 to deflect the limiting swing arm 320 in the limiting direction. When the limiting swing arm 320 is in the initial state, the spring is in the natural length or the stretched length, and preferably in the natural length.

[0071] In a possible implementation, as shown in Figure 4 The traction device of the pay-off trolley further includes an elastic abutting releasing assembly 410 connected to the fixed part of the moving mechanism 100, which is used to resist the elastic abutting member 331 to push the limiting support 310 and / or the limiting swing arm 320 in the limiting direction, and pull the upper surface of the limiting support 310 away from the busbar 500 to form a gap, so that the one-way limiting mechanism 200 allows the moving mechanism 100 to move relative to the busbar 500 in the limiting direction.

[0072] In the implementation process, based on the elastic deformation characteristics of the elastic abutting member 331, the application sets an elastic abutting release assembly 410, and the elastic abutting release assembly 410 is used to

[0073] Specifically, a through hole 411 is formed at one end of the limiting support member 310 close to the limiting direction, and a pulling structure 412, such as a rigid member or a flexible structure (for example, a steel wire or a rubber-coated steel wire), which is convenient to connect or manually pull, is passed through the through hole 411. The limiting support member 310 can be manually pulled by an operator to move in the limiting direction.

[0074] In one possible implementation, as shown in Figure 4 As shown in Figure 5 The limiting support member 310 includes a rigid abutting member 332, which includes a rotating shaft 333, a driving member 334, and an eccentric arc-shaped disc 335. The rotating shaft 333 is rotationally connected to the fixed part of the moving mechanism 100. The driving member 334 acts on the rotating shaft 333 to drive the rotating shaft 333 to rotate. The eccentric arc-shaped disc 335 is fixedly connected to the rotating shaft 333 and located at one side of the limiting swing arm 320 close to the limiting direction. The eccentric arc-shaped disc 335 has an arc-shaped side surface 336, and the axis of the arc-shaped side surface 336 is parallel to the axis of the rotating shaft 333. The eccentric arc-shaped disc 335 is used to rotate under the driving of the rotating shaft 333, and in the process of rotation, the arc-shaped side surface 336 is in contact with the limiting swing arm 320 until it abuts against the limiting swing arm 320.

[0075] It should be understood that the axis of the arc-shaped side surface 336 is parallel to the axis of the rotating shaft 333, which means that the two axes are parallel but not collinear, that is, the arc-shaped side surface 336 is eccentric to the rotating shaft 333.

[0076] In the implementation process, the driving member 334 drives the rotating shaft 333 to rotate, the rotating shaft 333 drives the eccentric arc-shaped disc 335 to rotate, the arc-shaped side surface 336 of the eccentric arc-shaped disc 335 is released from the limiting swing arm 320, and the eccentric arc-shaped disc 335 is continuously rotated to gradually abut against the limiting swing arm 320, so that the limiting support member 310 abuts against the busbar 500, and there is a pressure action between the two. When it is necessary to move the traction device, the rotating shaft 333 is rotated by the driving member 334, the eccentric arc-shaped disc 335 is driven away from the limiting swing arm 320, and the limiting swing arm 320 is released. At this time, the moving mechanism 100 can move in the limiting direction and the direction opposite to the limiting direction. That is, the rigid abutting member 332 itself can realize one-way limiting release.

[0077] Preferably, the one-way limiting mechanism 200 includes the elastic abutting member 331 and the rigid abutting member 332. At this time, the rigid abutting member 332 can be used as a structure to assist in increasing the limiting direction abutting force, and assist the elastic abutting member 331 to realize one-way limiting.

[0078] Optionally, the arc-shaped side surface 336 can be a segment of an arc, or a complete circumference, an elliptical circumference, etc.

[0079] In a possible implementation, the driving member 334 is a handheld rotating arm installed on the rotating shaft 333.

[0080] In a possible implementation, the driving member 334 is a motor installed on the rotating arm.

[0081] In a possible implementation, the upper surface of the limiting support member 310 abutting against the busbar 500 is provided with sawteeth 311 inclined to the limiting direction.

[0082] In the above implementation, the sawteeth 311 provided on the upper surface of the limiting support member 310 can increase the friction between the limiting support member 310 and the busbar 500, thereby increasing the locking effect of the one-way limiting.

[0083] In a possible implementation, the sawteeth 311 cover part or all of the upper surface of the limiting swing arm 320.

[0084] In a possible implementation, the limiting assembly 300 includes one limiting support member 310, at least two limiting swing arms 320 and at least two abutting members 330, the at least two limiting swing arms 320 are arranged along the limiting direction, and each abutting member 330 acts on at least one limiting swing arm 320.

[0085] In the above implementation, the limiting support member 310 is long strip-shaped, and two or more limiting swing arms 320 and abutting members 330 are arranged on one limiting support member 310, so that the stability of the one-way limiting can be improved while the structure is simplified to a certain extent.

[0086] Optionally, the number of the limiting swing arms 320 and the abutting members 330 can be the same or different. The abutting members 330 can be arranged on the limiting swing arms 320 or not.

[0087] In a possible implementation, the one-way limiting mechanism 200 includes two groups of limiting assemblies 300, and the limiting support members 310 of the two groups of limiting assemblies 300 are respectively arranged in the wheel grooves 520 embedded in the lower sides of the two wings 510 of the busbar 500.

[0088] In the above implementation, the busbar 500 has a symmetrical structure, and therefore, the two groups of limiting mechanisms 200 can improve the stability of the one-way limiting and the stability of the movement of the traction device.

[0089] In a possible implementation, as shown in FIG. 1, the one-way limiting mechanism 200 includes two groups of limiting assemblies 300, and the limiting support members 310 of the two groups of limiting assemblies 300 are respectively arranged in the wheel grooves 520 embedded in the lower sides of the two wings 510 of the busbar 500. Figure 6 、 Figure 7 andFigure 8 As shown, the maximum distance between the axis of rotation of the limiting swing arm 320 and the moving mechanism 100 and the upper surface of the limiting support 310 for abutting against the busbar 500 is L 1max , the distance between the axis of rotation of the limiting swing arm 320 and the moving mechanism 100 and the contact surface of the moving mechanism 100 for contacting the busbar 500 is L2, the thickness of the wing plate 510 of the busbar 500 at the wheel groove 520 is L3, and L 1max +L3>L2.

[0090] It should be understood that the above L3 refers to the thickness of the wing plate 510 of the busbar 500 at the wheel groove 520 in the case that the upper surface of the limiting support 310 can contact the groove bottom of the wheel groove 520; if the groove bottom of the wheel groove 520 is relatively narrow, the upper surface of the limiting support 310 cannot contact the groove bottom of the wheel groove 520, then L3 refers to the distance between the upper surface of the limiting support 310 and the upper surface of the wing plate 510 when the limiting support 310 is embedded in the wheel groove 520 the deepest.

[0091] In the above implementation process, under the condition that L 1max +L3>L2, when the moving mechanism 100 is connected to the busbar 500, the busbar 500 can have a force on the limiting support 310, which can press the limiting swing arm 320 away from the vertical direction to the limiting direction, thereby achieving one-way limiting.

[0092] In a possible implementation, the moving mechanism 100 includes a rack 110 and two sets of guide wheels 120, the guide wheels 120 are rotatably connected to the rack 110, and the two sets of guide wheels 120 are used to be hung on the wing plates 510 below the two sides of the busbar 500 and roll along the wing plates 510.

[0093] In the above implementation process, the guide wheels 120 are arranged to roll on the wing plates 510 of the busbar 500, which is simple in structure, convenient to move, and has small friction.

[0094] In a possible implementation, the guide wheels 120 are movably connected to the rack 110, and the guide wheels 120 can move along the axis of the guide wheels 120 relative to the rack 110.

[0095] In the above implementation process, when the limiting support 310 is embedded into the wheel groove 520 but not extruded against the busbar 500 during the installation of the traction device, the lowest point of the guide wheel 120 is below the upper surface of the wing plate 510, and when the limiting support 310 is lifted upward and the busbar 500 is extruded, the guide wheel 120 is entirely lifted above the upper surface of the wing plate 510, at this time, the two groups of guide wheels 120 are moved towards the side plate 530 of the busbar 500, and then the moving mechanism 100 is released, the guide wheel 120 naturally falls onto the upper surface of the wing plate 510 and is extruded against the wing plate 510 from both sides of the wing plate 510, thereby applying pressure to the wing plate 510.

[0096] In a possible implementation, the moving assembly further comprises a guide shaft 130, which is connected with the guide wheel 120 and is threadedly connected with the rack 110.

[0097] In the above implementation process, the guide shaft 130 is threadedly connected with the rack 110, and rotation of the guide shaft 130 can realize axial movement of the guide wheel 120, which is simple in structure and convenient to operate.

[0098] In a possible implementation, the axial minimum distance of the two groups of guide wheels 120 is greater than or equal to the maximum distance of the busbar 500 in the direction perpendicular to the side plate 530.

[0099] In the above implementation process, at the connection position of the two sections of the busbar 500, there are protruding set nuts and the like, in order to ensure that the moving mechanism 100 can move smoothly and unobstructed on the busbar 500, the axial minimum distance of the two groups of guide wheels 120 is greater than or equal to the maximum distance of the busbar 500 in the direction perpendicular to the side plate 530.

[0100] In a possible implementation, the moving assembly further comprises a guide driving member 334, which is connected with the guide wheel 120 and is used to drive the guide wheel 120 to rotate.

[0101] In the above implementation process, the guide driving member 334 is used to drive the guide wheel 120 to rotate, thereby driving the traction device to move along the busbar 500, without the need for manual driving, which can reduce the working intensity of the operator.

[0102] Specifically, the guide driving member 334 can be an electric motor or a hydraulic motor and the like.

[0103] In a possible implementation, as shown in Figure 3 the rack 110 comprises two installation plates 111 arranged side by side and a connecting member 112 connecting the two installation plates 111, and the two groups of guide wheels 120 are respectively installed on the two installation plates 111.

[0104] Optionally, two sets of limiting components 300 are also respectively installed on the two mounting plates 111.

[0105] In a second aspect, the application also provides a traction device of a pay-off trolley, which comprises the pay-off trolley traction device in any one of the embodiments of the first aspect and a winch 600 fixedly connected to the moving mechanism 100 of the pay-off trolley traction device.

[0106] The basic principles and main features of the application and the advantages of the application are shown and described above, and it is obvious for those skilled in the art that the application is not limited to the details of the above exemplary embodiments, and the application can be implemented in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0107] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A pulling device for a reel cart, characterized in that The utility model relates to a cable laying device, including: A moving mechanism is used for connecting a winch, being movably connected with a busbar and being movable along the length direction of the busbar; A limiting mechanism is used for limiting the moving mechanism when the moving mechanism moves to a predetermined position on the busbar, preventing the moving mechanism from moving to a limiting direction close to the cable laying trolley; the limiting mechanism is a one-way limiting mechanism, which is used for preventing the moving mechanism from moving to the limiting direction relative to the busbar and allowing the moving mechanism to move to a direction opposite to the limiting direction relative to the busbar; the one-way limiting mechanism comprises a limiting component, which comprises a limiting support, being embedded in a wheel groove on the lower side of a wing plate of the busbar when the moving mechanism is movably connected with the busbar; A limiting swing arm, a first end of the limiting swing arm being rotatably connected with a fixed part of the moving mechanism, a second end of the limiting swing arm being rotatably connected with the limiting support, the second end of the limiting swing arm being used for being driven by the limiting support to deflect away from the vertical direction to the limiting direction under the extrusion of the busbar on the limiting support; when the limiting swing arm is perpendicular to the wing plate of the busbar, the direction of the length extension of the limiting swing arm is the vertical direction; A pressing member is connected with the fixed part of the moving mechanism, being used for acting on the limiting swing arm and applying an opposite force to the limiting swing arm to make the limiting support press against the busbar; A one-way limiting releasing component is connected with the fixed part of the moving mechanism, being used for acting on the one-way limiting mechanism to allow the moving mechanism to move to the limiting direction relative to the busbar.

2. The tractor of claim 1, wherein, The pressing member comprises an elastic pressing member, which is deformed under the action of the limiting swing arm when the limiting swing arm deflects to the limiting direction.

3. The tractor of claim 2, wherein, An elastic pressing releasing component is connected with the fixed part of the moving mechanism, being used for resisting the elastic pressing member to push the limiting support and / or the limiting swing arm to the limiting direction to allow the moving mechanism to move to the limiting direction relative to the busbar.

4. The tractor of claim 1, wherein, The limiting support comprises a rigid pressing member, which comprises: A rotating shaft is rotatably connected with the fixed part of the moving mechanism; A driving member acts on the rotating shaft, being used for driving the rotating shaft to rotate; An eccentric arc-shaped disc is fixedly connected with the rotating shaft and located on the side of the limiting swing arm close to the limiting direction, the eccentric arc-shaped disc having an arc-shaped side, the axis of the arc-shaped side being parallel to the axis of the rotating shaft; the eccentric arc-shaped disc is used for rotating under the driving of the rotating shaft and contacting the limiting swing arm with the arc-shaped side until pressing against the limiting swing arm in the process of rotation.

5. The tractor of claim 4, wherein, The driving member is a handheld rotating arm installed on the rotating shaft, and / or The driving member is a motor installed on the rotating arm.

6. The tractor of claim 1, wherein, The upper surface of the limiting support abutting against the busbar is provided with sawteeth, which are inclined to the limiting direction.

7. A tractor for a cable drum as claimed in claim 6, characterised in that, The sawteeth cover part or all of the upper surface of the limiting swing arm.

8. The tractor of claim 1, wherein, The limiting assembly comprises one limiting support, at least two limiting swing arms arranged along the limiting direction, and at least two abutting members, each of which acts on at least one limiting swing arm.

9. The tractor of claim 1, wherein, The one-way limiting mechanism comprises two sets of limiting assemblies, and the limiting supports of the two sets of limiting assemblies are respectively applied to the wheel grooves on the lower sides of the two wing plates embedded in the busbar.

10. The tractor of claim 1, wherein, The maximum distance from the axis of rotation of the limiting swing arm connected with the moving mechanism to the upper surface of the limiting support for abutting against the bus bar is L 1max The distance from the axis of rotation of the limiting swing arm connected with the moving mechanism to the contact surface of the moving mechanism for contacting the bus bar is L2, the thickness of the wing plate of the bus bar at the wheel groove is L3, and L 1max +L3>L2.

11. A drag device for a reel truck as claimed in any one of claims 1 to 10, wherein, The moving mechanism comprises a rack and two sets of guide wheels, which are rotatably connected to the rack and are respectively hung on the wing plates on both sides of the busbar below and roll along the wing plates.

12. The tractor of claim 11, wherein, The guide wheels are movably connected to the rack, and can move along the axis of the guide wheels relative to the rack.

13. The tractor of claim 12, wherein, The moving mechanism further comprises a guide shaft, which is connected to the guide wheels and is threadedly connected to the rack.

14. The tractor of claim 11, wherein, The minimum axial distance between the two sets of guide wheels is greater than or equal to the maximum distance perpendicular to the side plate direction on the busbar.

15. The tractor of claim 11, wherein, The moving mechanism further comprises a guide driving member, which is connected to the guide wheels and is used to drive the guide wheels to rotate.

16. The tractor of claim 11, wherein, The rack comprises two installation plates arranged side by side and a connecting member connecting the two installation plates, and the two sets of guide wheels are respectively installed on the two installation plates.

17. A pulling apparatus for a spooling trolley, characterised in that, The traction device comprises a winch and the line car as claimed in any one of claims 1-16, and the winch is fixedly connected to the moving mechanism of the traction device of the line car. The upper surface of the limiting support abutting against the busbar is provided with sawteeth, which are inclined to the limiting direction. The sawteeth cover part or all of the upper surface of the limiting swing arm. The limiting assembly comprises one limiting support, at least two limiting swing arms arranged along the limiting direction, and at least two abutting members, each of which acts on at least one limiting swing arm. The one-way limiting mechanism comprises two sets of limiting assemblies, and the limiting supports of the two sets of limiting assemblies are respectively applied to the wheel grooves on the lower sides of the two wing plates embedded in the busbar. The moving mechanism comprises a rack and two sets of guide wheels, which are rotatably connected to the rack and are respectively hung on the wing plates on both sides of the busbar below and roll along the wing plates. The guide wheels are movably connected to the rack, and can move along the axis of the guide wheels relative to the rack. The moving mechanism further comprises a guide shaft, which is connected to the guide wheels and is threadedly connected to the rack. The minimum axial distance between the two sets of guide wheels is greater than or equal to the maximum distance perpendicular to the side plate direction on the busbar. The moving mechanism further comprises a guide driving member, which is connected to the guide wheels and is used to drive the guide wheels to rotate. The rack comprises two installation plates arranged side by side and a connecting member connecting the two installation plates, and the two sets of guide wheels are respectively installed on the two installation plates. Including a winch and the line car as claimed in any one of claims 1-16, and the winch is fixedly connected to the moving mechanism of the traction device of the line car.

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