Cable bridge lifting and positioning device

Abstract

The application provides a lifting and positioning device of a cable bridge, and belongs to the technical field of cable laying and installation equipment, and solves the problems of manual pushing in high altitude and difficult positioning in limited space in the installation of the existing bridge, and comprises a front positioning assembly, a rear positioning assembly, a lifting assembly and a rotating arm; the front positioning assembly and the rear positioning assembly are respectively arranged at the front and rear ends of the lifting assembly and are rotationally connected with the lifting assembly; the two ends of the rotating arm are respectively rotationally connected with the rear positioning assembly and the lifting assembly; the front positioning assembly and the rear positioning assembly both comprise positioning units oppositely distributed left and right, each positioning unit is provided with a lateral conveying belt and a bottom conveying belt, the lifting assembly is driven to synchronously lift, the rotating arm is driven to swing by a pull plate through an electric telescopic rod, the bridge is lifted in a posture of high front and low rear, the front end is moved to be beyond the front lateral cross arm, the bridge is leveled by swinging the rotating arm forward, and the bridge is moved backward and is placed on the cross arm, the application realizes automatic lifting and positioning of the bridge, manual pushing in high altitude is not needed, positioning is accurate, safe and efficient.

Description

Technical Field

[0001] This invention relates to the field of cable laying and installation equipment technology, and specifically to a cable tray lifting and positioning device. Background Technology

[0002] Cable trays, as carriers of cables in buildings, are widely used in various building electrical engineering projects. The traditional method of installing cable trays usually involves pre-installing and fixing the crossarms (supports) to the roof or wall, then raising the cable tray to the preset height, placing it on the crossarms, and fixing it with bolts.

[0003] Extensive research has been conducted on cable tray installation devices in the existing technology. For example, some cable tray installation devices are equipped with a traveling mechanism and a cable guiding and positioning component, which lifts the cable to the target position through the cooperation of a slewing bearing and a swing head component; other cable tray installation devices are equipped with a swing arm and a telescopic arm, which swing and lift the cable by rotating a shaft, realizing a secondary lifting function; in addition, there are cable tray installation lifters, cable tray installation auxiliary devices, etc., which realize the lifting or horizontal transportation function of the cable tray through lifting mechanisms, conveyor belts, etc.

[0004] However, the aforementioned existing technologies still have the following shortcomings in practical applications: Firstly, existing lifting devices only have a single lifting function. With the crossbeam pre-installed on the roof, the cable tray needs to be lifted above the crossbeam and then manually pushed horizontally into place. This requires multiple people working at height, which is not only inefficient but also poses a safety risk of the cable tray slipping and causing injury. Most of these devices are of a split structure, meaning the lifting and positioning functions are achieved through different mechanisms, and the positioning process after lifting still requires significant manual intervention.

[0005] Secondly, when the crossarm spacing is less than the cable tray length, or when installation space is limited, it is difficult to place the cable tray directly onto the crossarm by vertical lifting. Although some literature mentions that it is necessary to "first tilt one end at a certain angle into the hanger," this method relies entirely on manual operation and requires a high degree of coordination among workers. "Improper coordination among workers can easily lead to cable tray slippage, causing injury to construction personnel." Existing technology has not yet proposed a systematic solution that can automatically realize the cable tray's posture transformation to complete the placement of the cable tray in a confined space.

[0006] Third, in existing lifting devices, there is no structural design that directly utilizes the installed crossarm as a positioning reference. In the current technology, the crossarm is only used as a load-bearing component after the cable tray is installed, and is not used for positioning and guiding the lifting device. This results in a lack of precise mechanical positioning relationship between the device and the crossarm, requiring re-measurement and calibration for each installation. The repeatability of positioning accuracy is low, making it difficult to meet the accuracy requirements of mass installation. Summary of the Invention

[0007] In order to solve or at least partially solve the technical problems of existing cable tray installation requiring manual pushing at height and difficulty in positioning in confined spaces, the present invention provides a cable tray lifting and positioning device.

[0008] To achieve the aforementioned objectives, the present invention is implemented through the following technical solution: A cable tray lifting and positioning device includes a front positioning assembly, a rear positioning assembly, a lifting assembly, and a rotating arm. The front positioning assembly and the rear positioning assembly are respectively disposed at the front and rear ends of the lifting assembly. The front positioning assembly is rotatably connected to the lifting assembly. The rotating arm is rotatably connected between the two ends of the rear positioning assembly and the lifting assembly. The front positioning assembly and the rear positioning assembly are arranged to drive the cable tray to move along its own length.

[0009] The cable tray has a first posture in which it is placed inside the front positioning assembly and the rear positioning assembly and is in a front-high and rear-low posture; the cable tray has a second posture in which it is moved forward by the front positioning assembly and the rear positioning assembly; in the second posture, the swing arm swings forward, so that the cable tray has a third posture in which it is arranged horizontally.

[0010] When the cable tray is in the first posture, the front end of the cable tray is located behind the front crossarm. The lifting component lifts the cable tray so that the front end of the cable tray is higher than the front crossarm and the rear end is lower than the rear crossarm. When the cable tray is in the first height, by switching from the first posture to the second posture and then from the second posture to the third posture, it has a second height in which both the front and rear ends are higher than the front crossarm and the rear crossarm.

[0011] Furthermore, both the front positioning assembly and the rear positioning assembly include two sets of positioning units distributed in a left-right opposite manner. Each set of positioning units includes a positioning bracket, a lateral conveyor belt, and a bottom conveyor belt. The lateral conveyor belt and the bottom conveyor belt are rotatably mounted on the side and bottom of the positioning bracket, respectively. The lateral conveyor belt is used to clamp the side of the cable tray, and the bottom conveyor belt is used to support the bottom of the cable tray.

[0012] Furthermore, each of the positioning units also includes a belt roller and a bevel gear pair. One belt roller is provided at each of the front and rear ends of the lateral conveyor belt and the bottom conveyor belt. A bevel gear pair is provided between the belt roller at the front end of the lateral conveyor belt and the belt roller at the front end of the bottom conveyor belt, and between the belt roller at the rear end of the lateral conveyor belt and the belt roller at the rear end of the bottom conveyor belt. The rear positioning assembly also includes a first motor, which is mounted at the bottom of the positioning bracket, and the output shaft of the first motor is engaged with the belt roller at the rear end of one of the lateral conveyor belts.

[0013] Furthermore, the lifting assembly includes a guide frame, a lifting frame, and a lifting drive assembly. The front positioning assembly and the rear positioning assembly are respectively disposed at the front end and rear end inside the guide frame. The lifting frame is slidably sleeved on the guide frame in the height direction. The opposite sides of the two positioning brackets in the front positioning assembly are rotatably connected to the two sides of the lifting frame. The bottom ends of the two rotating arms are rotatably connected to the opposite sides of the two positioning brackets in the rear positioning assembly. The top ends of the two rotating arms are rotatably connected to the two sides of the lifting frame. The lifting drive assembly is disposed between the guide frame and the lifting frame and is used to drive the lifting frame to perform lifting movements.

[0014] Furthermore, the lifting drive assembly includes a second motor, a lead screw, and a lead sleeve. The second motor is fixedly mounted on the top of the guide frame, the lead screw is rotatably mounted on the side of the guide frame, and the lead sleeve is fixedly mounted on the side of the lifting frame. The lead screw and the lead sleeve are threaded together, and the top end of the lead screw is connected to the output shaft of the second motor.

[0015] Furthermore, a movable frame is provided at the bottom of the guide frame, the guide frame including a left guide frame and a right guide frame, and the lifting frame including a left lifting frame and a right lifting frame. The bottoms of the left and right guide frames are slidably mounted on the movable frame along the width direction, and the movable frame is provided with two adjustment components. The two adjustment components are respectively used to adjust the position of the left and right guide frames on the movable frame in the width direction. The left lifting frame is slidably mounted on the left guide frame in the height direction, and the right lifting frame is slidably mounted on the right guide frame in the height direction. A first telescopic rod is provided between the front ends of the left and right lifting frames, and the first telescopic rod is located below the front positioning component. A second telescopic rod is provided between the rear ends of the left and right lifting frames, and the second telescopic rod is located above the rear positioning component.

[0016] Furthermore, the positioning bracket includes a left bracket and a right bracket that slide together in the width direction. The left bracket and the right bracket in the positioning unit of the front positioning assembly are rotatably connected to the front ends of the left lifting frame and the right lifting frame, respectively. The left bracket and the right bracket in the positioning unit of the rear positioning assembly are rotatably connected to the bottom ends of two rotating arms, respectively. The top ends of the two rotating arms are rotatably connected to the rear ends of the left bracket and the right bracket, respectively.

[0017] Furthermore, a third telescopic rod is provided between the rollers of the two bottom conveyor belts in the front positioning assembly and between the rollers of the two bottom conveyor belts in the rear positioning assembly. The two ends of the second telescopic rod are fixedly connected to the rotation center of the top of the two rotating arms, respectively, and can rotate with the rotating arms. Both the second and third telescopic rods include a rod sleeve, a rod body, a slider, and a slide groove. The slide groove is provided on the inner wall of the rod sleeve, and the slider is fixedly provided on the surface of the rod body. The slide groove and the slider slide in cooperation.

[0018] Furthermore, the adjustment assembly includes a screw and a screw sleeve. Screw sleeves are fixedly installed at the bottom of both the left and right guide frames. The screw and the screw sleeve are threaded together, and the screw is rotatably mounted on the top of the movable frame.

[0019] Furthermore, front baffles are fixedly installed at the front ends of both the left and right guide frames, and the two front baffles are used to clamp the front crossarm from both ends; rear baffles are installed at the rear ends of both the left and right guide frames, and the two rear baffles are used to clamp the rear crossarm from both ends; longitudinal baffles are installed on the right side of both the front and rear baffles of the left guide frame, and the two longitudinal baffles are used to abut against the opposite sides of the left ends of the front and rear crossarms respectively.

[0020] All existing lifting and positioning devices use the ground as a reference for positioning. Before installation, the relative position between the device and the crossarm must be calibrated using laser or manual measurement, and this calibration process must be repeated for each installation. This application uses the already installed crossarm as the positioning reference for the device—by clamping the crossarm from both ends with front and rear baffles, and simultaneously with longitudinal baffles against the opposite sides of the crossarm, a six-degree-of-freedom rapid mechanical positioning of the device relative to the crossarm is achieved. This "reference reversal" design allows the device to automatically obtain an accurate spatial position without the need for any measuring instruments. Compared with the "measurement positioning" concept of existing technologies, this application adopts the "structural positioning" principle, fundamentally solving the problems of difficult positioning and low repeatability accuracy in high-altitude installation.

[0021] In existing technologies, cable tray placement generally adopts a two-stage method of "vertical lifting → horizontal pushing," or relies on the crude operation of "inserting one end first," without forming a complete automated installation method. This application is the first to propose a three-stage posture conversion installation method: "first posture (front high, rear low tilt) → second posture (moving forward and inserting above the front crossarm) → third posture (swinging the arm to level the cable tray)." This method utilizes the rotatable configuration of the front and rear positioning components, the coordinated rotation of the swing arm, the rear positioning component, and the lifting component, combined with the driving capability of the front and rear positioning components along the length of the cable tray, to ensure that the rear end of the cable tray remains lower than the rear crossarm during the forward insertion process. This successfully achieves "obstacle-free insertion" of the cable tray even in extreme conditions where the crossarm spacing is less than the cable tray length and space is limited.

[0022] Unlike existing technologies where lifting and positioning functions are separated into different mechanisms (first lifting with a lifting platform, then manual pushing or conveyor belt transport), this application integrates the lifting motion of the lifting assembly, the swing motion of the rotating arm, and the translational motion of the cable tray along its length driven by the front and rear positioning components into a coordinated automated system. The entire installation process—from ground clamping, tilting and lifting, forward insertion, swinging the rotating arm to horizontal, and finally lowering into place—can be completed by operators on the ground via remote control, completely eliminating the safety hazards of manual pushing at heights required in existing technologies. This represents a fundamental improvement to cable tray installation methods.

[0023] Existing devices are mainly based on "passive adaptation" - the cable tray's posture is basically fixed during the lifting process, and its position after installation is adjusted manually. This application achieves active control of the cable tray's spatial posture through the following structural innovations: (1) The front positioning component is rotatably connected to the lifting component, enabling the front end of the cable tray to adapt to changes in its posture; (2) The rotating arm is rotatably connected to the rear positioning component and the lifting component respectively, and together with the electric telescopic rod and the pull plate to form a crank rocker mechanism, making the lifting time and movement trajectory of the rear end of the cable tray precisely controllable; (3) The synchronous linkage drive of the lateral positioning conveyor belt and the bottom positioning conveyor belt enables the cable tray to move forward smoothly in an inclined state; (4) The linkage between the adjustment component and the first telescopic rod, the second telescopic rod, and the third telescopic rod enables the device to adapt to different crossarm spacings and cable tray widths.

[0024] In the aforementioned multi-degree-of-freedom coordinated motion, there is a strict timing relationship between the rotational connection of the front positioning component and the swing motion of the rotating arm—during the forward insertion phase, the front positioning component allows the front end of the cable tray to tilt upwards; in the third phase, when the rotating arm swings forward, the front positioning component adaptively rotates to a horizontal position with the cable tray, while the bottom conveyor belt maintains support for the cable tray within a small angle range. This coordinated control of "rotation—extension—swing—conveyance" enables the cable tray to complete obstacle-crossing positioning with dynamically adjusted spatial posture.

[0025] This application enables operators to perform clamping, attitude adjustment, and most control operations on cable trays from the ground or at low altitudes, eliminating the need for high-risk operations such as manual prying and pushing at heights, thus significantly reducing construction safety hazards. Compared with existing solutions, this application fundamentally changes the safety boundaries of high-altitude operations, representing a radical shift in the safety paradigm for cable tray installation. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the cable tray lifting and positioning device of the present invention lifting the cable tray in the first position to the first height; Figure 2 This is the present invention. Figure 1 A partial schematic diagram; Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle; Figure 4 This is the present invention. Figure 2 A schematic diagram of the lifting and positioning device for cable trays; Figure 5 This is the present invention. Figure 4 Enlarged view at point B in the middle; Figure 6 This is the present invention. Figure 5 A partial exploded view in the image; Figure 7 This is the present invention. Figure 4 Another perspective view; Figure 8 This is the present invention. Figure 7 Enlarged view at point C; Figure 9 This is a cross-sectional view of the second and third telescopic rods of the present invention.

[0028] In the diagram: 1-Lifting assembly; 11-Guide frame; 111-Left guide frame; 112-Right guide frame; 12-Lifting frame; 121-Left lifting frame; 122-Right lifting frame; 123-Electric telescopic rod; 124-Pull plate; 125-Extension rod; 13-Second motor; 14-Lead screw; 15-Screw sleeve; 16-First telescopic rod; 17-Front baffle; 18-Rear baffle; 19-Longitudinal baffle; 2-Rotating arm; 3-Positioning unit; 31-Positioning bracket; 311-Left bracket; 312-Right bracket; 32-Side conveyor belt; 33-Bottom conveyor belt; 34-Belt roller; 35-Bevel gear pair; 4-First motor; 5-Moving frame; 51-Universal wheel; 52-Guide rail; 6-Adjusting assembly; 61-Screw; 62-Screw sleeve; 7-Rod sleeve; 8-Rod body; 9-Slider; 10-Groove. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0031] like Figures 1 to 3 As shown, this embodiment provides a cable tray lifting and positioning device, including a front positioning component, a rear positioning component, a lifting component 1, and a rotating arm 2.

[0032] The front positioning assembly and the rear positioning assembly are respectively located at the front and rear ends of the lifting assembly 1, and the lifting assembly 1 can synchronously raise and lower the front positioning assembly and the rear positioning assembly. The cable tray to be installed is placed between the front positioning assembly and the rear positioning assembly, so that the front positioning assembly stably supports the front end of the cable tray and the rear positioning assembly stably supports the rear end of the cable tray.

[0033] The front positioning assembly is rotatably connected to the lifting assembly 1, allowing the front positioning assembly to rotate along a vertical plane on the lifting assembly 1. A rotating arm 2 is rotatably connected between the two ends of the rear positioning assembly and the lifting assembly 1. Specifically, the bottom end of the rotating arm 2 is rotatably connected to the rear positioning assembly, and the top end of the rotating arm 2 is rotatably connected to the lifting assembly 1. The front and rear positioning assemblies are arranged to drive the cable tray to move along its own length. When the bottom end of the rotating arm 2 swings forward, the rear positioning assembly follows the swing of the rotating arm 2 in a circular motion. Simultaneously, the cable tray allows the rear positioning assembly to adaptively rotate at the front end of the rotating arm 2, and the cable tray allows the front positioning assembly to adaptively rotate on the lifting assembly 1. The cable tray also moves relative to the front and rear positioning assemblies along its own length.

[0034] The cable tray has a first posture in which it is placed inside the front positioning component and the rear positioning component and is in a front-high and rear-low posture; the cable tray has a second posture in which it is moved forward by the front positioning component and the rear positioning component; in the second posture, the swing arm 2 swings forward, so that the cable tray has a third posture in which it is arranged horizontally.

[0035] When the cable tray is in the first posture, the front end of the cable tray is located behind the front crossarm. The lifting component 1 lifts the cable tray so that the front end of the cable tray is higher than the front crossarm and the rear end is lower than the rear crossarm. When the cable tray is in the first posture, it switches from the first posture to the second posture and then from the second posture to the third posture, so that both the front and rear ends are higher than the front crossarm and the rear crossarm.

[0036] When using: First, based on the positions of the front and rear crossarms, the front positioning assembly is positioned behind the front crossarm in the front-back direction—that is, the cable tray laying direction. The initial position of the rear positioning assembly is such that after the swing arm 2 swings forward, the rear positioning assembly can move to the position in front of the rear crossarm, and the height of the front positioning assembly is greater than the height of the rear positioning assembly.

[0037] Place the cable tray onto the front and rear positioning components, ensuring the front end of the cable tray is flush with the front end of the front positioning component. At this point, the rear end of the cable tray extends from the rear positioning component, resulting in a first orientation where the front is higher than the rear.

[0038] Start lifting assembly 1 to simultaneously lift the front positioning assembly and the rear positioning assembly, raising the cable tray upwards. When the height of the front end of the cable tray is greater than that of the front crossarm, stop lifting assembly 1. At this time, the rear end of the cable tray is located below the rear crossarm.

[0039] The front and rear positioning components move the cable tray forward along its length (i.e., the direction of tilt). As the cable tray tilts forward and moves upward, its front end extends forward past the front crossarm until its rear end is flush with the rear end of the rear positioning component. At this point, the cable tray is in its second posture.

[0040] When the start arm 2 rotates forward, the bottom end of the start arm 2 makes a circular motion forward, and the rear positioning component carries the rear end of the cable tray to make a circular motion from the front lower part of the rear crossarm until the cable tray is horizontal, at which point the cable tray is in the third posture.

[0041] The cable tray is moved backward by the front and rear positioning components so that the front and rear ends of the cable tray span the front and rear crossarms.

[0042] Start the lifting assembly 1 to simultaneously lower the front positioning assembly and the rear positioning assembly, so that the cable tray is placed on the front crossarm and the rear crossarm. At this point, the lifting and positioning of the cable tray is completed.

[0043] In summary, this embodiment, through the cooperation of the front positioning component, the rear positioning component, and the rotating arm 2, establishes a systematic installation process of "tilting-forward movement-swinging-reverse movement-lowering," achieving one-time precise positioning in confined spaces while ensuring high precision, high safety, and high efficiency. By transforming the complex operation of traditional "vertical lifting + high-altitude lateral movement" into a smooth installation method of "oblique obstacle avoidance + controlled swinging," it represents a substantial improvement to the cable tray installation method and has the following overall advantages: By employing a three-stage attitude transition—"first attitude (front high, rear low tilt) → second attitude (moving forward and inserting above the front crossarm) → third attitude (swinging arm 2 to horizontal)"—the cable tray can first pass diagonally above the front crossarm and then be raised as a whole to the top of the crossarm. This effectively avoids the spatial obstruction of the crossarm and solves the installation interference problem caused by the crossarm spacing limitation in the existing technology.

[0044] By utilizing the rotation of the front positioning assembly and the lifting assembly 1, and the linkage rotation of the rotating arm 2 with the rear positioning assembly and the lifting assembly 1, combined with the driving capability of the positioning assembly and the lifting assembly 1 in the length direction of the cable tray, the cable tray maintains a controllable and stable movement trajectory throughout the entire lifting and positioning process, preventing the cable tray from shaking, deflecting or accidentally slipping during installation, and improving the final positioning accuracy on the crossarm.

[0045] Operators can perform clamping, posture adjustment, and most control operations (such as starting the lifting, driving the swing arm 2 to swing, and controlling the forward and backward movement of the cable tray) on the ground or at low altitudes, without having to perform high-risk auxiliary operations such as manual prying and pushing at high altitudes, which significantly reduces construction safety hazards.

[0046] This device integrates the complex process that originally required multiple machines and multiple adjustments by multiple people into a single unit, completing the task through orderly mechanized linkage (tilting → moving forward → swinging → moving backward → lowering). The operation steps are clear, reducing the time spent on on-site manual measurement, alignment, and repeated trial assembly, thus improving construction efficiency.

[0047] Since the entire process of moving the cable tray forward, swinging, and lowering is completed through structural limits and controlled drives, it avoids scratches on the cable tray surface, damage to the coating, or deformation of the crossarm that may be caused by manual prying, which helps to ensure the anti-corrosion performance and overall appearance quality of the cable tray after installation.

[0048] like Figure 4 and Figure 5 As shown, both the front positioning assembly and the rear positioning assembly include two sets of positioning units 3 distributed in opposite directions. Each set of positioning units 3 includes a positioning bracket 31, a side conveyor belt 32, and a bottom conveyor belt 33. The side conveyor belt 32 and the bottom conveyor belt 33 are rotatably mounted on the side and bottom of the positioning bracket 31, respectively. The side conveyor belt 32 is used to clamp the side of the cable tray, and the bottom conveyor belt 33 is used to support the bottom of the cable tray.

[0049] When the cable tray is placed on the front or rear positioning assembly, the two bottom conveyor belts 33 on the left side support the left side of the cable tray's bottom, and the two bottom conveyor belts 33 on the right side support the right side of the cable tray's bottom, providing reliable bottom support in the vertical direction. The two lateral conveyor belts 32 on the left side contact the left side of the cable tray, and the two lateral conveyor belts 32 on the right side contact the right side of the cable tray, ensuring precise alignment and stable clamping of the cable tray in the width direction. Through multi-point rolling support on the sides and bottom of the cable tray, not only is smooth, low-friction transport of the cable tray between different workstations achieved, but the alignment and clamping function between the left and right lateral conveyor belts 32 also effectively prevents lateral slippage or overturning of the cable tray in the first, second, and third positions, significantly improving the stability and safety of the installation process.

[0050] like Figure 6 As shown, each positioning unit 3 also includes a belt roller 34 and a bevel gear pair 35. One belt roller 34 is provided at both the front and rear ends of the side conveyor belt 32 and the bottom conveyor belt 33. A bevel gear pair 35 is provided between the belt roller 34 at the front end of the side conveyor belt 32 and the belt roller 34 at the front end of the bottom conveyor belt 33, and between the belt roller 34 at the rear end of the side conveyor belt 32 and the belt roller 34 at the rear end of the bottom conveyor belt 33.

[0051] The two sets of bevel gear pairs 35 in the front positioning assembly ensure that the rotation axes of the bottom conveyor belt 33 and the two side conveyor belts 32 are perpendicular to each other and can be synchronously linked. Similarly, the two sets of bevel gear pairs 35 in the rear positioning assembly ensure that the rotation axes of the bottom conveyor belt 33 and the two side conveyor belts 32 are perpendicular to each other and can be synchronously linked.

[0052] like Figure 6 As shown, the rear positioning assembly also includes a first motor 4, which is mounted at the bottom of the positioning bracket 31, and the output shaft of the first motor 4 is engaged with the belt roller 34 at the rear end of one of the lateral conveyor belts 32.

[0053] Specifically, the first motor 4 is fixedly installed at the bottom of the positioning bracket 31 located on the right side in the rear positioning assembly. The output shaft of the first motor 4 is connected to the belt roller 34 at the rear end of the lateral conveyor belt 32 located on the right side in the rear positioning assembly, so that when the front positioning assembly and the rear positioning assembly drive the bridge to move, the rear positioning assembly is the active driving end, while the front positioning assembly is the driven end.

[0054] With the above structure, when the first motor 4 starts, its output shaft drives the lateral conveyor belt 32, which is directly connected to it, to rotate. Through the bevel gear pair 35, the lateral conveyor belt 32 and the bottom conveyor belt 33 within the same positioning unit 3 can be linked to operate, ensuring the synchronicity and consistency of clamping and conveying actions. This design requires only a single motor to drive two mutually perpendicular conveyor belts, which not only reduces manufacturing costs but also reduces the complexity of electrical control.

[0055] like Figure 2 As shown, the lifting assembly 1 includes a guide frame 11, a lifting frame 12, and a lifting drive assembly. The front positioning assembly and the rear positioning assembly are respectively located at the front end and rear end inside the guide frame 11. The lifting frame 12 is slidably sleeved on the guide frame 11 in the height direction. The opposite sides of the two positioning brackets 31 in the front positioning assembly are rotatably connected to the two sides of the lifting frame 12. The bottom ends of the two rotating arms 2 are rotatably connected to the opposite sides of the two positioning brackets 31 in the rear positioning assembly. The top ends of the two rotating arms 2 are rotatably connected to the two sides of the lifting frame 12. The lifting drive assembly is located between the guide frame 11 and the lifting frame 12 and is used to drive the lifting frame 12 to perform lifting movements.

[0056] With the above structure, when the lifting drive assembly drives the lifting frame 12 to rise and fall, the front positioning assembly and the rear positioning assembly rise and fall synchronously with the lifting frame 12. At the same time, the front positioning assembly can rotate freely around the front pivot of the lifting frame 12, and the rear positioning assembly can make circular motion with the swing of the rotating arm 2, thereby realizing the multi-degree-of-freedom linkage function mentioned above.

[0057] like Figure 2 As shown, the lifting drive assembly includes a second motor 13, a lead screw 14, and a lead sleeve 15. The second motor 13 is fixedly mounted on the top of the guide frame 11, the lead screw 14 is rotatably mounted on the side of the guide frame 11, and the lead sleeve 15 is fixedly mounted on the side of the lifting frame 12. The lead screw 14 and the lead sleeve 15 are threadedly engaged, and the top end of the lead screw 14 is connected to the output shaft of the second motor 13.

[0058] The second motor 13, either a servo motor or a stepper motor, enables precise height control. The second motor 13 is mounted on the top right side of the guide frame 11. The lead screw 14 is vertically mounted on the right side of the guide frame 11 via a bearing housing. The top of the lead screw 14 is connected to the output shaft of the second motor 13 via a coupling (not shown). When the second motor 13 starts, its output shaft drives the lead screw 14 to rotate. The rotational motion of the lead screw 14 is converted into the linear motion of the threaded sleeve 15 through a threaded connection, thereby driving the lifting frame 12 to move up and down along the guide frame 11. The lead screw 14 transmission has the advantages of smooth transmission, high positioning accuracy, and good self-locking performance, ensuring that the lifting frame 12 can reliably stop at any height and effectively preventing accidental falls.

[0059] like Figure 2 and Figure 4 As shown, a movable frame 5 is provided at the bottom of the guide frame 11, and casters 51 are provided at each of the four corners of the bottom of the movable frame 5. The guide frame 11 includes a left guide frame 111 and a right guide frame 112, and the lifting frame 12 includes a left lifting frame 121 and a right lifting frame 122. The bottoms of the left guide frame 111 and the right guide frame 112 are slidably mounted on the movable frame 5 along the width direction, and the movable frame 5 is provided with two adjustment components 6. The two adjustment components 6 are used to adjust the position of the left guide frame 111 and the right guide frame 112 on the movable frame 5 in the width direction. Specifically, a guide rail 52 extending along the width direction is provided at the top of the movable frame 5, and the bottoms of the left guide frame 111 and the right guide frame 112 are slidably fitted onto the outside of the guide rail 52, so that the left guide frame 111 and the right guide frame 112 can move towards each other or away from each other on the movable frame 5 to adjust the width between them.

[0060] like Figure 3 , Figure 6 and Figure 7 As shown, the left lifting frame 121 is slidably mounted on the left guide frame 111 in the height direction, and the right lifting frame 122 is slidably mounted on the right guide frame 112 in the height direction. A first telescopic rod 16 is provided between the front ends of the left lifting frame 121 and the right lifting frame 122. The first telescopic rod 16 is located below the front positioning assembly and is used to connect the front ends of the left lifting frame 121 and the right lifting frame 122 in the width direction. A second telescopic rod is provided between the rear ends of the left lifting frame 121 and the right lifting frame 122. The second telescopic rod is located above the rear positioning assembly and is used to connect the rear ends of the left lifting frame 121 and the right lifting frame 122 in the width direction.

[0061] The telescopic characteristics of the first telescopic rod 16 and the second telescopic rod ensure that the left lifting frame 121 and the right lifting frame 122 maintain a stable connection at both ends during the process of adjusting the width of the left guide frame 111 and the right guide frame 112, thereby enhancing the overall rigidity and torsional resistance of the entire lifting frame structure.

[0062] like Figure 6As shown, the positioning bracket 31 includes a left bracket 311 and a right bracket 312 that slide together in the width direction. The left bracket 311 and the right bracket 312 in the positioning unit 3 of the front positioning assembly are rotatably connected to the front ends of the left lifting frame 121 and the right lifting frame 122, respectively. Specifically, the left bracket 311 is rotatably connected to the front end of the left lifting frame 121 via a pivot, and the right bracket 312 is rotatably connected to the front end of the right lifting frame 122 via a pivot. The rotating arm 2 adopts an L-shaped structure, including a long arm section and a short arm section. The left bracket 311 and the right bracket 312 in the positioning unit 3 of the rear positioning assembly are rotatably connected to the bottom ends of the two rotating arms 2 (the ends of the long arm sections of the L-shaped structure), and the top ends of the two rotating arms 2 (the ends of the short arm sections of the L-shaped structure) are rotatably connected to the rear ends of the left lifting frame 121 and the right lifting frame 122, respectively. The above configuration ensures that the left and right sides of the front and rear positioning components can independently adapt to the positional changes of the left lifting frame 12 and the right lifting frame 122, while retaining their own independent rotational freedom, thus providing a structural basis for the tilting and swaying of the cable tray.

[0063] like Figure 5 and Figure 6 As shown, a third telescopic rod is provided between the rollers 34 of the two bottom conveyor belts 33 in the front positioning assembly and between the rollers 34 of the two bottom conveyor belts 33 in the rear positioning assembly. The third telescopic rod allows the spacing between the two bottom conveyor belts 33 to be adjusted synchronously according to the width of the bridge frame, ensuring that the two bottom conveyor belts 33 are always symmetrically supported on the left and right sides of the bottom of the bridge frame.

[0064] The two ends of the second telescopic rod are fixedly connected to the rotation center of the top of the two rotating arms 2 (the short arm end of the L-shaped structure), and can rotate with the rotating arm 2. The second telescopic rod not only serves to connect the rear ends of the left lifting frame 121 and the right lifting frame 122, but also provides space for the movement of the cable tray and avoids movement interference due to the safe distance between the second telescopic rod and the rear positioning assembly.

[0065] like Figure 9 As shown, both the second and third telescopic rods include a sleeve 7, a rod body 8, a slider 9, and a groove 10. The groove 10 is located on the inner wall of the sleeve 7 and extends along its length. The slider 9 is fixedly mounted on the surface of the rod body 8, and the groove 10 and the slider 9 slide in engagement. Through the engagement of the slider 9 and the groove 10, the rod body 8 can freely extend and retract within the sleeve 7 without relative rotation, thus achieving length adjustment while transmitting torque or maintaining direction. This telescopic rod has a simple structure, reliable operation, and can meet the needs of left and right width adjustment.

[0066] In this embodiment, by setting the third telescopic rod, only one first motor 4 needs to be set in the rear positioning assembly corresponding to the right lateral conveyor belt 32. When the first motor 4 is started, the first motor 4 drives the positioning unit 3 located on the right side of the rear positioning assembly to rotate. At the same time, the third telescopic rod can synchronously drive the positioning unit 3 located on the left side of the rear positioning assembly to rotate synchronously, so that the rear positioning assembly can drive the bridge to move symmetrically in the left and right directions.

[0067] like Figure 2 As shown, the adjusting assembly 6 includes a screw 61 and a screw sleeve 62. Screw sleeves 62 are fixedly installed at the bottom of both the left guide frame 111 and the right guide frame 112. The screw 61 is threadedly engaged with the screw sleeve 62, and the screw 61 is rotatably mounted on the top of the movable frame 5. The operator can adjust the position of the left guide frame 111 and the right guide frame 112 in the width direction of the movable frame 5 by rotating the two screws 61 respectively, thus accommodating cable trays of different widths.

[0068] like Figure 3 As shown, front baffles 17 are fixedly installed at the front ends of both the left guide frame 111 and the right guide frame 112. The two front baffles 17 are used to clamp the front crossarm from both ends. Rear baffles 18 are installed at the rear ends of both the left guide frame 111 and the right guide frame 112. The two rear baffles 18 are used to clamp the rear crossarm from both ends. When the width of the left guide frame 111 and the right guide frame 112 is adjusted by the adjusting component 6, the distance between the two front baffles 17 and the distance between the two rear baffles 18 change synchronously until they abut against the ends of the front crossarm and the right crossarm, respectively, to achieve precise lateral positioning of the device.

[0069] like Figure 3 As shown, longitudinal baffles 19 are provided on the right side of the front baffle 17 and the rear baffle 18 of the left guide frame 111. The two longitudinal baffles 19 are used to abut against the opposite sides of the left end of the front crossarm and the left crossarm, respectively. The longitudinal baffles 19 play a role in longitudinal positioning, ensuring that the device can be accurately aligned with the crossarm in the front-rear direction as well.

[0070] By combining the front baffle 17, the rear baffle 18 and the longitudinal baffle 19, the device can achieve rapid positioning relative to the installed crossarm in six degrees of freedom (lateral, longitudinal and height directions) without the need for complex measuring instruments, which significantly improves the efficiency and positioning accuracy of on-site installation.

[0071] In particular, longitudinal baffles 19 are only installed on the front baffle 17 and rear baffle 18 of the left guide frame 111, so that the surfaces of the front baffle 17 and rear baffle 18 on the right guide frame 112 that contact the front and rear crossarms are flat. After the cable tray lifting and positioning work is completed, simply rotate the corresponding adjustment component 6 of the left guide frame 111 to move the left guide frame 111 to the left, remove the longitudinal baffles 19 from the area of ​​the front and rear crossarms, and then directly push the device forward to the working position of the next cable tray.

[0072] like Figures 6 to 8 As shown, an electric telescopic rod 123 is rotatably mounted at the rear end of the right lifting frame 122. Specifically, the electric telescopic rod 123 uses a push rod motor or electric cylinder, and its outer shell is rotatably connected to the top of the side of the right lifting frame 122 (an extension rod 125 extending upwards is fixed to the rear side of the right lifting frame 122, and the top of the outer shell of the electric telescopic rod 123 is rotatably connected to the top of the extension rod 125). The extended end of the electric telescopic rod 123 faces downwards, and a pull plate 124 is hinged to the extended end of the electric telescopic rod 123. The pull plate 124 is an arc-shaped plate, and its bottom end is hinged to the right-side rotating arm 2 (the hinge position is located at the junction of the long arm section and the short arm section of the L-shaped structural component). The electric telescopic rod 123, the pull plate 124, and the right-side rotating arm 2 together form a crank-rocker mechanism. When the extended end of the electric telescopic rod 123 retracts upwards, it pulls the pull plate 124 upwards, which in turn pulls the rotating arm 2, causing the rotating arm 2 to swing forward (i.e., Figure 1 The rotating arm 2 rotates counterclockwise, causing the positioning assembly to move forward. When it is necessary to swing the rotating arm 2 back to its original position, the extended end of the electric telescopic rod 123 extends downward. At this time, the pull plate 124 moves downward, and the rotating arm 2 swings back to its original position (i.e., ...). Figure 1 The rotating arm 2 in the middle rotates clockwise.

[0073] When using the cable tray lifting and positioning device provided in the above embodiments, the operation can be carried out according to the following procedure: 1. Based on the width of the cable tray, use the adjusting component 6 to roughly adjust the distance between the left guide 111 and the right guide 112 so that the distance between the longitudinal baffle 19 and the right front baffle 17 is slightly greater than the length of the crossbeam (generally about 10 cm). At this time, the distance between the two lateral conveyor belts 32 in the front positioning component and the rear positioning component is greater than the width of the cable tray.

[0074] 2. Move the entire device between the front crossarm and the rear crossarm where the cable tray needs to be installed using the movable frame 5, so that the front side of the longitudinal baffle 19 located on the front side contacts the rear side of the front crossarm. Then place the cable tray on the front positioning assembly and the rear positioning assembly, so that the front end of the cable tray is flush with the front end of the front positioning assembly.

[0075] 3. Operate the adjustment components 6 corresponding to the right guide frame 112 and the left guide frame 111 respectively, so that the two front baffles 17 clamp the front crossarm and the two rear baffles 18 clamp the rear crossarm. At this time, the two lateral conveyor belts 32 in the front positioning component clamp the two sides of the bridge frame, and the two lateral conveyor belts 32 in the rear positioning component clamp the two sides of the bridge frame, and the bridge frame is in the first posture.

[0076] 4. Start the second motor 13 to rotate forward. The second motor 13 drives the lead screw 14 to rotate. The lead screw 14 drives the right lifting frame 122 to move upward through the lead sleeve 15. The right lifting frame 122 causes the left lifting frame 121 to move upward synchronously through the first telescopic rod 16 and the second telescopic rod, thereby raising the entire lifting frame 12. At this time, the lifting frame 12 raises the cable tray through the front positioning assembly and the rear positioning assembly. When the front end of the cable tray is higher than the front crossarm, stop the second motor 13.

[0077] 5. Start the first motor 4. The first motor 4 drives the bottom conveyor belt 33 and the two side conveyor belts 32 in the rear positioning assembly to move forward on the working surface of the bridge frame, causing the bridge frame to move forward. The bridge frame then pushes the bottom conveyor belt 33 and the two side conveyor belts 32 in the front positioning assembly to move synchronously. During this process, the bridge frame moves forward at an upward angle, passing diagonally over the front crossarm. The front end of the bridge frame inserts into and passes through the area enclosed by the front suspension wire and the front crossarm. When the rear end of the bridge frame is flush with the rear positioning assembly, stop the first motor 4, and the bridge frame assumes a second posture.

[0078] 6. Activate the electric telescopic rod 123, causing its extended end to retract upwards. At this time, the pull plate 124 pulls the rotating arm 2 forward, causing the rotating arm 2 to move in a circular motion. The movement trajectory of the rear positioning component is from below the second telescopic rod to its front and upper part, that is, the rear positioning component moves counterclockwise around the second telescopic rod. During this process, the first motor 4 is in a paused state, so that the rear positioning component is relatively fixed to the cable tray along its length. The rear positioning component is rotatably connected to the rotating arm 2, and the front positioning component is rotatably connected to the lifting frame 12, allowing the cable tray to be pushed by the rear positioning component and move forward relative to the front positioning component. The front and rear positioning components can adaptively adjust to the changes in the cable tray's posture. When the extended end of the electric telescopic rod 123 retracts upwards to its maximum distance, the electric telescopic rod 123 pauses. At this time, the rear positioning component moves to the front and upper part of the second telescopic rod, and the rear positioning component is at the same height as the front positioning component, thus making the cable tray horizontal, which is the third posture.

[0079] 7. Start the first motor 4 to reverse, and then pull the cable tray backward with the positioning assembly. When the front and rear ends of the cable tray extend approximately the same distance from the front crossarm and the rear crossarm, respectively, stop the first motor 4.

[0080] 8. Operate the adjustment component 6 corresponding to the left guide frame 111 to move the left guide frame 111 to the left, and remove the longitudinal baffle 19 from the length range of the front crossarm and the rear crossarm.

[0081] 9. Start the second motor 13 to reverse, causing the lifting frame 12 to move down and reset. During this process, the cable tray is placed on the front and rear crossarms to complete its positioning. Then, start the electric telescopic rod 123 to extend and reset, realizing the reset of the rear positioning assembly. At this point, the lifting and positioning operation of one cable tray is completed.

[0082] 10. Move the device to the installation position of the next cable tray and follow the above procedure.

[0083] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A lifting and positioning device for cable trays, characterized in that: It includes a front positioning assembly, a rear positioning assembly, a lifting assembly (1) and a rotating arm (2). The front positioning assembly and the rear positioning assembly are respectively disposed at the front and rear ends of the lifting assembly (1). The front positioning assembly is rotatably connected to the lifting assembly (1). The rotating arm (2) is rotatably connected between the two ends of the rear positioning assembly and the lifting assembly (1). The front positioning assembly and the rear positioning assembly are arranged to drive the cable tray to move along its own length. The cable tray has a first posture in which it is placed inside the front positioning component and the rear positioning component and is in a front-high and rear-low posture; the cable tray has a second posture in which it is moved forward by the front positioning component and the rear positioning component during the first posture; during the second posture, the rotating arm (2) swings forward, so that the cable tray has a third posture in which it is arranged horizontally. When the cable tray is in the first posture, the front end of the cable tray is located behind the front crossarm. The lifting component (1) lifts the cable tray so that the cable tray has a first height where the front end is higher than the front crossarm and the rear end is lower than the rear crossarm. When the cable tray is at the first height, it has a second height where both the front and rear ends are higher than the front and rear crossarms by switching from the first posture to the second posture and from the second posture to the third posture.

2. The cable tray lifting and positioning device according to claim 1, characterized in that: Both the front positioning assembly and the rear positioning assembly include two sets of positioning units (3) arranged in a left-right opposite manner. Each set of positioning units (3) includes a positioning bracket (31), a side conveyor belt (32), and a bottom conveyor belt (33). The side conveyor belt (32) and the bottom conveyor belt (33) are rotatably mounted on the side and bottom of the positioning bracket (31), respectively. The side conveyor belt (32) is used to clamp the side of the cable tray, and the bottom conveyor belt (33) is used to support the bottom of the cable tray.

3. The cable tray lifting and positioning device according to claim 2, characterized in that: Each of the positioning units (3) further includes a belt roller (34) and a bevel gear pair (35). One belt roller (34) is provided at each end of the side conveyor belt (32) and the bottom conveyor belt (33). A bevel gear pair (35) is provided between the belt roller (34) at the front end of the side conveyor belt (32) and the belt roller (34) at the front end of the bottom conveyor belt (33), and between the belt roller (34) at the rear end of the side conveyor belt (32) and the belt roller (34) at the rear end of the bottom conveyor belt (33). The rear positioning assembly also includes a first motor (4), which is mounted at the bottom of the positioning bracket (31), and the output shaft of the first motor (4) is driven by a belt roller (34) at the rear end of one of the lateral conveyor belts (32).

4. The cable tray lifting and positioning device according to claim 2, characterized in that: The lifting assembly (1) includes a guide frame (11), a lifting frame (12), and a lifting drive assembly. The front positioning assembly and the rear positioning assembly are respectively located at the front end and rear end inside the guide frame (11). The lifting frame (12) is slidably sleeved on the guide frame (11) in the height direction. The opposite sides of the two positioning brackets (31) in the front positioning assembly are rotatably connected to the two sides of the lifting frame (12). The bottom ends of the two rotating arms (2) are rotatably connected to the opposite sides of the two positioning brackets (31) in the rear positioning assembly. The top ends of the two rotating arms (2) are rotatably connected to the two sides of the lifting frame (12). The lifting drive assembly is located between the guide frame (11) and the lifting frame (12) and is used to drive the lifting frame (12) to perform lifting movements.

5. The cable tray lifting and positioning device according to claim 4, characterized in that: The lifting drive assembly includes a second motor (13), a lead screw (14), and a threaded sleeve (15). The second motor (13) is fixedly mounted on the top of the guide frame (11). The lead screw (14) is rotatably mounted on the side of the guide frame (11). The threaded sleeve (15) is fixedly mounted on the side of the lifting frame (12). The lead screw (14) and the threaded sleeve (15) are threaded together, and the top end of the lead screw (14) is connected to the output shaft of the second motor (13).

6. The cable tray lifting and positioning device according to claim 4, characterized in that: The bottom of the guide frame (11) is provided with a movable frame (5). The guide frame (11) includes a left guide frame (111) and a right guide frame (112). The lifting frame (12) includes a left lifting frame (121) and a right lifting frame (122). The bottoms of the left guide frame (111) and the right guide frame (112) are slidably mounted on the movable frame (5) in the width direction. The movable frame (5) is provided with two adjustment components (6). The two adjustment components (6) are used to adjust the left guide frame (111) and the right guide frame (112) in the width direction, respectively. At the position on the movable frame (5), the left lifting frame (121) is slidably disposed on the left guide frame (111) in the height direction, and the right lifting frame (122) is slidably disposed on the right guide frame (112) in the height direction. A first telescopic rod (16) is provided between the front ends of the left lifting frame (121) and the right lifting frame (122), and the first telescopic rod (16) is located below the front positioning assembly. A second telescopic rod is provided between the rear ends of the left lifting frame (121) and the right lifting frame (122), and the second telescopic rod is located above the rear positioning assembly.

7. The cable tray lifting and positioning device according to claim 6, characterized in that: The positioning bracket (31) includes a left bracket (311) and a right bracket (312) that slide together in the width direction. The left bracket (311) and the right bracket (312) in the positioning unit (3) of the front positioning assembly are rotatably connected to the front ends of the left lifting frame (121) and the right lifting frame (122), respectively. The left bracket (311) and the right bracket (312) in the positioning unit (3) of the rear positioning assembly are rotatably connected to the bottom ends of two rotating arms (2), respectively. The top ends of the two rotating arms (2) are rotatably connected to the rear ends of the left bracket (311) and the right bracket (312), respectively.

8. The cable tray lifting and positioning device according to claim 6, characterized in that: A third telescopic rod is provided between the rollers (34) of the two bottom conveyor belts (33) in the front positioning assembly and between the rollers (34) of the two bottom conveyor belts (33) in the rear positioning assembly. The two ends of the second telescopic rod are fixedly connected to the top rotation center of the two rotating arms (2) respectively, and can rotate with the rotating arms (2). The second telescopic rod and the third telescopic rod both include a rod sleeve (7), a rod body (8), a slider (9) and a groove (10). The groove (10) is provided on the inner wall of the rod sleeve (7), and the slider (9) is fixedly provided on the surface of the rod body (8). The groove (10) and the slider (9) slide together.

9. The cable tray lifting and positioning device according to claim 6, characterized in that: The adjustment assembly (6) includes a screw (61) and a screw sleeve (62). The bottom of the left guide frame (111) and the right guide frame (112) are both fixedly installed with screw sleeves (62). The screw (61) and the screw sleeve (62) are threaded together, and the screw (61) is rotatably installed on the top of the movable frame (5).

10. The cable tray lifting and positioning device according to claim 6, characterized in that: The front ends of the left guide frame (111) and the right guide frame (112) are both fixedly provided with front baffles (17), and the two front baffles (17) are used to clamp the front crossarm from both ends; the rear ends of the left guide frame (111) and the right guide frame (112) are both provided with rear baffles (18), and the two rear baffles (18) are used to clamp the rear crossarm from both ends; the right side of the front baffles (17) and the rear baffles (18) of the left guide frame (111) are both provided with longitudinal baffles (19), and the two longitudinal baffles (19) are used to abut against the opposite sides of the left end of the front crossarm and the rear crossarm, respectively.

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