Arch bar tension lift high arm

Abstract

The application discloses a bow piece tension lifting high arm, which comprises a vehicle body, a left bow piece and a terminal; the bottom end of the left bow piece is rotationally connected to the vehicle body, and the top end is fixedly connected to the terminal; the left bow piece comprises multiple bow pieces rotationally connected in sequence, a driving mechanism corresponding to each bow piece and a tensioning mechanism; the driving mechanism is used for driving the corresponding bow piece to rise and fold; the tensioning mechanism is used for cross locking at least one bow piece in a rising state, so that the bow piece is tensioned to form an arc stable structure; and the bow piece is made of carbon fiber. The bow piece tension lifting high arm realizes the lightweight, stability, low energy consumption and easy maintenance targets, adopts the carbon fiber material and has excellent elasticity and tensile property, so that the self weight is reduced and the structural strength and reliability are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aerial work, and particularly relates to a bow piece tension lifting arm. BACKGROUND

[0002] Most of the lifting arms commonly seen in the market at present adopt a hydraulic telescopic driving system, which can realize efficient lifting function, but has the following main shortcomings: complex structure, the hydraulic system usually needs multiple pipelines, pump stations and control devices, resulting in relatively complicated overall structure, which is not conducive to miniaturization and lightweight design; high energy consumption, the hydraulic driving system has large energy consumption, especially when a specific position needs to be maintained for a long time, more energy is consumed; high maintenance cost, the hydraulic system is prone to failure due to problems such as pipeline aging or leakage, and the cost of repair and replacement of spare parts is high; high manufacturing cost, since the hydraulic system involves multiple precision components, its manufacturing cost is generally high; single-arm swinging problem, the existing single-arm structure design is prone to left and right swinging due to uneven stress, which affects the stability of operation and the reliability of the structure; large weight, the hydraulic driving system and metal arm structure are usually adopted, which results in large overall weight of the equipment, and the heavy lifting arm needs a special transport vehicle or loading and unloading equipment, increasing the transportation and deployment cost of the equipment when used across regions.

[0003] Therefore, there is an urgent need for a lightweight, stable and easy-to-maintain lifting arm structure to solve the above problems. SUMMARY

[0004] The application provides a bow piece tension lifting arm, which realizes the goals of lightweight, stability, low energy consumption and easy maintenance, adopts carbon fiber material with excellent elasticity and tensile strength, and not only reduces the self-weight, but also improves the structural strength and reliability.

[0005] In order to achieve the above purpose, the application adopts the following specific technical solutions:

[0006] A bow piece tension lifting arm, which comprises a vehicle body, a left bow piece and a terminal end.

[0007] The vehicle body is used for bearing and moving.

[0008] The bottom end of the left bow piece is rotationally connected to the vehicle body, and the top end is fixedly connected to the terminal end; the left bow piece comprises multiple bow pieces rotationally connected in sequence, a driving mechanism corresponding to each bow piece, and a tensioning mechanism; the driving mechanism is used for driving the corresponding bow piece to rise and fold; the tensioning mechanism is used for cross-locked at least one bow piece in the rising state, so that the bow piece forms an arc-shaped stable structure; the bow piece is made of carbon fiber.

[0009] Further, a right arch piece symmetrical to the left arch piece is further included; a bottom end of the right arch piece is rotatably connected to the vehicle body, and a top end of the right arch piece is fixedly connected to the end; the left arch piece and the right arch piece form a double arch piece structure to improve stability.

[0010] Further, a force sensor corresponding to the tensioning mechanism is further included.

[0011] The force sensor is used to detect the resistance of the corresponding tensioning mechanism, so as to adjust the tensioning force.

[0012] Further, the left arch piece includes a first arch piece, a second arch piece, a third arch piece, a first driving mechanism, a second driving mechanism, a third driving mechanism, a first tensioning mechanism, and a second tensioning mechanism.

[0013] The first driving mechanism is fixedly installed on the vehicle body and is used to drive the first arch piece.

[0014] The second driving mechanism is fixedly installed on the top end of the first arch piece and is used to drive the second arch piece.

[0015] The third driving mechanism is fixedly installed on the top end of the second arch piece and is used to drive the third arch piece.

[0016] The first tensioning mechanism is connected between the bottom end of the first arch piece and the top end of the second arch piece, and is used to lock the first arch piece and the second arch piece in the raised state.

[0017] The second tensioning mechanism is connected between the bottom end of the second arch piece and the top end of the third arch piece, and is used to lock the second arch piece and the third arch piece in the raised state.

[0018] Further, the left arch piece further includes a transmission mechanism transmissionally connected between the corresponding arch piece and the driving mechanism.

[0019] Further, the transmission mechanism is a rope transmission mechanism, a belt transmission mechanism, a chain transmission mechanism, or a gear transmission mechanism.

[0020] Further, the driving mechanism is a servo motor or a stepper motor.

[0021] Further, the cross-sectional shape of the arch piece is arc-shaped, rectangular, or elliptical.

[0022] Further, the rope in the tensioning mechanism is a high-strength fiber rope, a metal wire rope, a coated steel belt, or a steel wire belt.

[0023] Further, the arch piece is replaced by a high-strength composite material or a lightweight metal material instead of carbon fiber.

[0024] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0025] The arch piece tension lifting high arm of the present application adopts an arch piece made of carbon fiber material, has significant advantages in weight, stability and multifunctionality compared with traditional high lifting arms, has excellent wind and earthquake resistance, a wide range of activities and high cost performance, and therefore has broad market prospects and application potential in disaster relief, firefighting, lighting and shooting fields.

[0026] The structure is simplified, the traditional hydraulic system is abandoned, a rope driving mode is adopted instead of the existing telescopic structure, weight reduction and wind resistance improvement can be achieved, the number of parts is effectively reduced, the structure is simpler, maintenance cost is reduced, energy consumption is reduced, and maintenance is relatively simple.

[0027] Lightweight design, rope driving greatly reduces the weight of the mechanical arm, improves the overall portability and work efficiency, and improves the moving performance.

[0028] High reliability, the double-arch piece structure design significantly enhances the lateral stability of the high lifting arm, can control the left and right shaking problem, and ensures the accuracy and safety of the high lifting operation.

[0029] Convenient maintenance, the rope driving structure has low maintenance cost, only needs to check the rope wear condition regularly, and does not need complex hydraulic pipe maintenance.

[0030] Multifunctionality, widely used in firefighting, lighting, shooting and other fields.

[0031] Intelligent force control locking design, the force sensor dynamically adjusts the rope locking force to ensure the stability of the high lifting arm under wind resistance and multidirectional impact, and realizes the breakthrough of wind and earthquake resistance performance.

[0032] The high lifting arm design has large angle activity ability, the front and rear swinging range can reach 160°, and has a larger working space compared with traditional high lifting arms. The expansion of the activity range makes it more flexible to adapt to firefighting and rescue, disaster relief, high lighting, high shooting and other purposes, and improves the practical value of the product. Therefore, the key shortcomings in the prior art are overcome, and the product has wide market application prospect and technical advantages. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of the arch piece tension lifting high arm in the elevated state of the present application;

[0034] Figure 2 is Figure 1 is a rear view of the arch piece tension lifting high arm;

[0035] Figures 3a-3cStructure schematic diagram of the arch piece tension lifting high arm in the folded state of the present application.

[0036] Wherein, 1-left first arch piece, 2-left second arch piece, 3-left third arch piece, 4-car body, 5-end, 6-right third arch piece, 7-right second arch piece, 8-right first arch piece, 9-right second tensioning mechanism, 10-left second tensioning mechanism, 11-right first tensioning mechanism, 12-left first tensioning mechanism, 13-right second rope, 14-right third rope, 15-right first rope, 16-left first rope, 17-left third rope, 18-left second rope. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0038] As Figure 1 and Figure 2 As shown in the structure, the embodiment of the present application provides an arch piece tension lifting high arm, which comprises a car body 4, an end 5, a left arch piece and / or a right arch piece. In the arch piece tension lifting high arm, only the left arch piece or the right arch piece can be used, or both the left arch piece and the right arch piece can be used. In this embodiment, the left arch piece and the right arch piece with symmetrical structure are used simultaneously as an example for description. The car body 4 is used for bearing and moving, supporting the left arch piece, the right arch piece and the end 5, and supporting and carrying the left arch piece, the right arch piece and the end 5 to the required position through movement, supporting flexible deployment of the lifting high arm in different scenes.

[0039] As Figure 2As shown, the left and right arches are symmetrical structures, the bottom ends of the left and right arches are rotationally connected to the vehicle body 4, and the top ends are fixedly connected to the end 5, forming a double-arch structure to improve stability and avoid the problem of left and right shaking of a single arch. The end 5 can be used for fire water spraying, high-rise lighting, high-rise shooting, etc. The end 5 can be designed as a rotatable or telescopic mechanism to further improve the flexibility and operating range of the high-rise arm. The left and right arches each include a plurality of sections of arches rotationally connected in sequence, a driving mechanism corresponding to each section of arch, and a tensioning mechanism. The driving mechanism is used to drive the corresponding arch to rise and retract. The tensioning mechanism is used to cross-lock a plurality of arches in a raised state to form a stable arch structure. The arches are made of carbon fiber, high-strength composite material, or lightweight metal material. High-strength composite materials include glass fiber composite materials, Kevlar, etc. Lightweight metal materials include aluminum alloys and magnesium alloys. The arches made of carbon fiber material have excellent elasticity and tensile properties, not only reducing the weight of the equipment, but also improving the structural strength and reliability of the high-rise arm. The arches can also be made of mixed materials by introducing a honeycomb structure or foam core inside the arch to optimize the distribution of weight and strength while enhancing impact resistance.

[0040] The above-mentioned arch tensioning high-rise arm further includes a force sensor corresponding to the tensioning mechanism. The force sensor is used to detect the resistance of the corresponding tensioning mechanism to adjust the tensioning force.

[0041] In this embodiment, the left and right arches are provided with three arches as an example. The number of arches is not limited to three, and can be adjusted to single, multiple, unequal numbers of sections according to requirements. The number of sections of different arches can be inconsistent, and can be designed according to the high-rise distance and the size of the vehicle body 4 as needed to adapt to complex application scenarios. Figure 1 、 Figure 3a 、 Figure 3b and Figure 3cAs shown, the left part of the arch piece includes the left part of the first arch piece 1, the left part of the second arch piece 2, the left part of the third arch piece 3, the left part of the first driving mechanism (not shown in the figure), the left part of the second driving mechanism (not shown in the figure), the left part of the third driving mechanism (not shown in the figure), the left part of the first tensioning mechanism 12, and the left part of the second tensioning mechanism 10; the left part of the first driving mechanism is fixedly installed on the vehicle body 4 and is used to drive the left part of the first arch piece 1 to swing, and the left part of the first driving mechanism can lift and fold the left part of the first arch piece 1; the left part of the second driving mechanism is fixedly installed on the top end of the left part of the first arch piece 1 and is used to drive the left part of the second arch piece 2 to swing, and the left part of the second driving mechanism can lift and fold the left part of the second arch piece 2; the left part of the third driving mechanism is fixedly installed on the top end of the left part of the second arch piece 2 and is used to drive the left part of the third arch piece 3 to swing, and the left part of the third driving mechanism can lift and fold the left part of the third arch piece 3; the two ends of the left part of the first tensioning mechanism 12 are connected between the bottom end of the left part of the first arch piece 1 and the top end of the left part of the second arch piece 2 and are used to lock the left part of the first arch piece 1 and the left part of the second arch piece 2 in the lifting state; the two ends of the left part of the second tensioning mechanism 10 are connected between the bottom end of the left part of the second arch piece 2 and the top end of the left part of the third arch piece 3 and are used to lock the left part of the second arch piece 2 and the left part of the third arch piece 3 in the lifting state.

[0042] Symmetrically, the right part of the arch piece includes the right part of the first arch piece 8, the right part of the second arch piece 7, the right part of the third arch piece 6, the right part of the first driving mechanism (not shown in the figure), the right part of the second driving mechanism (not shown in the figure), the right part of the third driving mechanism (not shown in the figure), the right part of the first tensioning mechanism 11, and the right part of the second tensioning mechanism 9; the right part of the first driving mechanism is fixedly installed on the vehicle body 4 and is used to drive the right part of the first arch piece 8 to swing, and the right part of the first driving mechanism can lift and fold the right part of the first arch piece 8; the right part of the second driving mechanism is fixedly installed on the top end of the right part of the first arch piece 8 and is used to drive the right part of the second arch piece 7 to swing, and the right part of the second driving mechanism can lift and fold the right part of the second arch piece 7; the right part of the third driving mechanism is fixedly installed on the top end of the right part of the second arch piece 7 and is used to drive the right part of the third arch piece 6 to swing, and the right part of the third driving mechanism can lift and fold the right part of the third arch piece 6; the two ends of the right part of the first tensioning mechanism 11 are connected between the bottom end of the right part of the first arch piece 8 and the top end of the right part of the second arch piece 7 and are used to lock the right part of the first arch piece 8 and the right part of the second arch piece 7 in the lifting state; the two ends of the right part of the second tensioning mechanism 9 are connected between the bottom end of the right part of the second arch piece 7 and the top end of the right part of the third arch piece 6 and are used to lock the right part of the second arch piece 7 and the right part of the third arch piece 6 in the lifting state.

[0043] The two tensioning mechanisms of the left and right arch pieces are used for locking in the elevated state, and a double-rope locking scheme is adopted, which is significantly better than the single-rope start-end connection mode. This improvement not only effectively reduces the space occupied by the rope below the arch piece, but also further optimizes the compactness and adaptability of the structure, so that the elevated arm can still run flexibly in complex environments, even if obstacles are encountered. By crossing the ropes on the left and right sides of the arch piece, a more uniform locking force distribution is provided. The cross-locked mode is similar to an X-shaped tension structure, which can effectively disperse horizontal and vertical forces, and is superior to direct start-end connection of a single rope. The rope cross-locked elastic arch piece disperses the force at the arch piece connection point to multiple directions by simulating the force principle of a cable-stayed bridge, improving the structural stability and seismic performance of the elevated arm in the expanded state. When the elevated arm is expanded, the ropes apply tension to keep the arch piece in an arc shape, enhancing the stability and carrying capacity of the entire structure. The arc locking effect of the arch piece is shown in Figure 1 , which ensures the reliability of the elevated arm in different working states and fully considers the optimization of space utilization. The double-rope design achieves uniform transmission of tension through reasonable mechanical distribution, avoiding the risk of concentrated stress and rupture that may occur in single-rope use, thereby further improving the safety and durability of the entire elevated arm system. At the same time, sensors are provided for each rope to adjust the tensioning force in real time according to the resistance.

[0044] The left and right arch pieces not only meet the basic functions of the elevated arm, but also pay special attention to practicality in obstacle environments. The double tensioning mechanism layout can reduce the contact area of the ropes with obstacles, and by precisely adjusting the locking angle and tension, it ensures that the elevated arm can be flexibly expanded in space-limited scenarios. The overall structural design takes into account functionality and practicality, providing a more efficient solution for applications in complex environments.

[0045] The left and right arch pieces further comprise transmission mechanisms connected between the corresponding arch pieces and the driving mechanisms, which are used to transmit the power generated by the driving mechanisms to the corresponding arch pieces to drive the corresponding arch pieces to swing. The transmission mechanism is a rope transmission mechanism, a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism. The driving mechanism is a servo motor or a stepping motor, which can also be used to directly drive the joint, reducing the intermediate transmission structure and optimizing the efficiency and accuracy. The driving mechanism is driven by using a rope transmission mechanism, replacing the traditional hydraulic driving mode, which reduces the system complexity and the number of parts. When the driving mechanism and the arch piece are driven by the rope transmission mechanism, the right first driving mechanism and the right first arch piece 8 are driven by the right first rope 15, the right second driving mechanism and the right second arch piece 7 are driven by the right second rope 13, and the right third driving mechanism and the right third arch piece 6 are driven by the right third rope 14; the left first driving mechanism and the left first arch piece 1 are driven by the left first rope 16, the left second driving mechanism and the left second arch piece 2 are driven by the left second rope 18, and the left third driving mechanism and the left third arch piece 3 are driven by the left third rope 17.

[0046] The cross-sectional shape of each arch piece can be arc-shaped, rectangular or elliptical. The rope in the tensioning mechanism is a high-strength fiber rope, a metal wire rope, a coated steel belt or a steel wire belt, and a belt made of a high polymer composite material can also be used to meet the wear and corrosion resistance requirements of different use scenarios.

[0047] In the above-mentioned arch piece tensioning lifting arm, adjustable rigid support rods or dampers can be added between the arch pieces to further improve the wind resistance and shock resistance. The active anti-shake device is introduced to monitor the wind force and impact through sensors and adjust the balance of the lifting arm in real time. The intelligent and monitoring alternative scheme increases the intelligent control system and combines the AI algorithm to optimize the motion path and energy consumption of the lifting arm in real time. Remote monitoring function is provided through sensors and cameras to realize full-automatic or semi-automatic operation.

[0048] The arch piece tensioning lifting arm with the above structure solves the problems existing in the prior art from the following aspects:

[0049] To reduce the weight of the lifting arm: by introducing lightweight elastic arch pieces and rope driving technology, the self-weight design of the lifting arm is optimized to reduce the weight of the equipment.

[0050] To reduce energy consumption: the rope driving system does not need to be continuously powered with high power, and only driving force is applied during operation, which significantly reduces the energy consumption of the equipment.

[0051] For improving the stability of the elevating arm: in the fully extended state of the elevating arm, the rope is used for cross locking design, similar to the force principle of cable-stayed bridge, which can effectively disperse and resist multi-directional impact force, and keep the stability of the system.

[0052] When the elevating arm is subjected to wind resistance or lateral multi-directional impact, the double-bow piece structure can detect the change of force through sensors, dynamically adjust the locking force of the left and right bow piece ropes, and keep the balance of the elevating arm with different force responses. Combined with force sensors and automatic adjustment system, the locking force is dynamically adjusted to improve the wind and earthquake resistance performance of the system. The wind and earthquake resistance effect is significantly improved, and the complex high-altitude operation environment is adapted. The left and right shaking caused by uneven force of the traditional single bow piece is effectively avoided, the stability and operation precision of the elevating arm during high-altitude operation are ensured, and the reliability of the system is improved.

[0053] For reducing maintenance and use cost: the rope driving system is easy to install and maintain, and regular inspection or replacement of the rope can eliminate the complex maintenance problems in the hydraulic system, reducing the operation cost of the user.

[0054] For improving applicability and multifunctionality: the end 5 of the elevating arm can be equipped with different functional modules (such as fire water spraying, lighting equipment, camera, etc.) through modular design, which can adapt to various scene requirements.

[0055] For reducing weight: the double-bow piece elastic structure adopts carbon fiber material, which significantly reduces the weight of the equipment. Compared with the hydraulic drive elevating arm of the same specification in the market, the overall weight of the elevating arm is reduced by more than 40%, which is convenient for transportation and operation, especially suitable for fast response and portable demand scenes. The reduction of the weight of the elevating arm significantly reduces the load pressure of the vehicle body 4 or chassis, and the user can choose a smaller and lower cost load vehicle, thereby further reducing the comprehensive cost of the equipment.

[0056] The product uses carbon fiber material and rope driving system, which reduces the complexity and manufacturing cost of the hydraulic driving system under the premise of ensuring performance. The weight of the 30-meter-high hydraulic drive elevating arm in the market is about 3 tons, and the weight of the same height of the present scheme is reduced by more than 40% and the cost is reduced by more than 60%. It is expected to be popularized at a more competitive price, which can hold higher with the same weight, lighter with the same height, and lower price with the same height, meeting the needs of more scenes and situations. For example: the current 100-meter-high elevating vehicle weighs about 65 tons and costs more than 30 million yuan, which is difficult to increase the height, otherwise the price and weight are difficult to bear. If the present design scheme is adopted, the same height can produce lighter and lower price products, and the price and weight are reduced by more than half. When the weight and price remain unchanged, the elevating height can be increased by more than 60% of the existing height, greatly improving the product indicators.

[0057] It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the spirit and scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A bowstring tensioned lifting arm characterized by, The left part of the bow piece and the end; The vehicle body is used for carrying and moving; The bottom end of the left part of the bow piece is rotatably connected to the vehicle body, and the top end is fixedly connected to the end; the left part of the bow piece comprises a plurality of bow pieces connected in turn, a driving mechanism corresponding to each bow piece, and a tensioning mechanism; the driving mechanism is used for driving the corresponding bow piece to rise and fold; the tensioning mechanism is used for locking the non-adjacent ends of any two adjacent bow pieces in the rising state, so that the bow piece is tensioned to form an arch-shaped stable structure; the bow piece is made of carbon fiber.

2. The arch tensioning and lifting arm of claim 1, wherein, The right part of the bow piece is also included, which is symmetrical to the left part of the bow piece; the bottom end of the right part of the bow piece is rotatably connected to the vehicle body, and the top end is fixedly connected to the end; the left part of the bow piece and the right part of the bow piece form a double-bow piece structure to improve stability.

3. The arch tensioning and lifting arm of claim 2, wherein, The force sensor corresponding to the tensioning mechanism is also included; The force sensor is used for detecting the resistance of the corresponding tensioning mechanism, so as to adjust the tensioning force.

4. The arch tensioning and lifting arm of claim 1 or 2, wherein, The left part of the bow piece comprises a first bow piece, a second bow piece, a third bow piece, a first driving mechanism, a second driving mechanism, a third driving mechanism, a first tensioning mechanism and a second tensioning mechanism; The first driving mechanism is fixedly installed on the vehicle body and is used for driving the first bow piece; The second driving mechanism is fixedly installed on the top end of the first bow piece and is used for driving the second bow piece; The third driving mechanism is fixedly installed on the top end of the second bow piece and is used for driving the third bow piece; The two ends of the first tensioning mechanism are connected between the bottom end of the first bow piece and the top end of the second bow piece, and are used for locking the first bow piece and the second bow piece in the lifting state; The two ends of the second tensioning mechanism are connected between the bottom end of the second bow piece and the top end of the third bow piece, and are used for locking the second bow piece and the third bow piece in the lifting state.

5. The bowstring tensioning lifting arm of claim 4, wherein, The left part of the bow piece also comprises a transmission mechanism connected between the corresponding bow piece and the driving mechanism.

6. The bowstring tensioning lifting arm of claim 5, wherein, The transmission mechanism is a rope transmission mechanism, a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism.

7. The bowstring tensioning lifting arm of claim 5, wherein, The driving mechanism is a servo motor or a stepping motor.

8. The arch tensioning and lifting arm of claim 1, wherein, The cross-sectional shape of the bow piece is arc-shaped, rectangular or elliptical.

9. The arch tensioning and lifting arm of claim 1, wherein, The rope in the tensioning mechanism is a high-strength fiber rope, a metal wire rope, a coated steel belt or a steel wire belt.

10. The arch-lift arm of any one of claims 1-9, wherein, The bow piece is made of high-strength composite material or light metal material instead of carbon fiber.

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