Arch piece tensioning elevating arm

Abstract

The invention discloses a bow piece tensioning lifting arm. The bow piece tensioning lifting arm comprises a vehicle body, a left bow piece and a tail end. The bottom end of the left bow piece is rotationally connected to the vehicle body, and the top end is fixedly connected to the tail end; the left bow piece comprises a plurality of bow pieces which are sequentially and rotatably connected, driving mechanisms which are in one-to-one correspondence with the bow pieces, and tensioning mechanisms; the driving mechanisms are used for driving the corresponding bow pieces to rise and retract; the tensioning mechanism is used for crosswise locking at least one bow piece in a lifting state, so that the bow piece is tensioned to form an arch-shaped stable structure; the bow pieces are made of carbon fibers. According to the bow slice tensioning elevating arm, the purposes of light weight, stability, low energy consumption and easy maintenance are achieved, the carbon fiber material is adopted, excellent elasticity and tensile performance are achieved, the self weight is reduced, and the structural strength and reliability are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aerial work, and in particular relates to a bow piece tensioning and high-lifting arm. Background Art

[0002] At present, most of the common lifting arms on the market adopt hydraulic telescopic drive systems. Although they can achieve efficient lifting functions, they have the following major disadvantages: complex structure. The hydraulic system usually requires a variety of pipelines, pump stations and control devices, which makes the overall structure more complicated and not conducive to miniaturization and lightweight design; high energy consumption. The hydraulic drive system consumes a lot of energy, especially when it needs to maintain a specific position for a long time, which consumes more energy; high maintenance cost. The hydraulic system is prone to failure due to problems such as pipeline aging or leakage, and the cost of repairing and replacing parts is high; high manufacturing cost. Since the hydraulic system involves multiple precision components, its manufacturing cost is generally high; single-arm shaking problem. The existing single-arm structure design is prone to left and right shaking due to uneven force, affecting the stability of operation and the reliability of the structure; heavy weight. Hydraulic drive system and metal arm structure are mostly used, which leads to a large overall weight of the equipment. The heavy lifting arm requires a special transport vehicle or loading and unloading equipment, which increases the transportation and deployment cost of the equipment when it is used across regions.

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

[0004] The present invention provides a bow limb tensioning and raising arm, which achieves the goals of light weight, stability, low energy consumption and easy maintenance. The carbon fiber material used has excellent elasticity and tensile strength, which not only reduces the dead weight but also improves the structural strength and reliability.

[0005] In order to achieve the above object, the present invention adopts the following specific technical solutions:

[0006] A bow limb tensioning and raising arm, the bow limb tensioning and raising arm comprising a vehicle body, a left bow limb and a terminal end;

[0007] The vehicle body is used for carrying and moving;

[0008] The bottom end of the left bow piece is rotatably connected to the vehicle body, and the top end is fixedly connected to the end; the left bow piece includes a plurality of bow pieces rotatably connected in sequence, a driving mechanism corresponding to each bow piece, and a tensioning mechanism; the driving mechanism is used to drive the corresponding bow piece to rise and retract; the tensioning mechanism is used to cross-lock at least one bow piece in a raised state, so that the bow piece forms a bow-shaped stable structure; the bow piece is made of carbon fiber.

[0009] Furthermore, it also includes a right bow piece symmetrical to the left bow piece; the bottom end of the right bow piece is rotatably connected to the vehicle body, and the top end is fixedly connected to the end; the left bow piece and the right bow piece form a double bow piece structure to improve stability.

[0010] Furthermore, it also includes a force sensor corresponding to the tensioning mechanism one by one;

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

[0012] Furthermore, the left bow limb includes a first bow limb, a second bow limb, a third bow limb, 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 mounted on the vehicle body and is used to drive the first bow piece;

[0014] The second driving mechanism is fixedly mounted on the top of the first bow limb and is used to drive the second bow limb;

[0015] The third driving mechanism is fixedly mounted on the top of the second bow limb, and is used to drive the third bow limb;

[0016] The two ends of the first tensioning mechanism are connected between the bottom end of the first bow limb and the top end of the second bow limb, and are used to lock the first bow limb and the second bow limb in the raised state;

[0017] Two ends of the second tensioning mechanism are connected between the bottom end of the second bow limb and the top end of the third bow limb, and are used to lock the second bow limb and the third bow limb in the raised state.

[0018] Furthermore, the left bow piece also includes a transmission mechanism that is transmission-connected between the corresponding bow piece and the driving mechanism.

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

[0020] Furthermore, the driving mechanism is a servo motor or a stepping motor.

[0021] Furthermore, the cross-sectional shape of the limb is arc-shaped, rectangular or elliptical.

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

[0023] Furthermore, the bow limbs are made of high-strength composite materials or lightweight metal materials instead of carbon fibers.

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

[0025] The bow tensioning and raising arm of the present invention has significant advantages in weight, stability and versatility compared to traditional raising arms by adopting bow pieces made of carbon fiber material. Its excellent wind and earthquake resistance, wide range of activities and high cost performance make it have broad market prospects and application potential in the fields of disaster relief, fire fighting, lighting and photography.

[0026] The structure is simplified, the traditional hydraulic system is abandoned, and the rope drive is used instead of the existing telescopic structure, which can achieve weight reduction and improve wind resistance. It effectively reduces the number of parts, makes the structure simpler, reduces maintenance costs, and at the same time reduces energy consumption and is relatively simple to maintain.

[0027] Lightweight design and rope drive greatly reduce the weight of the robot arm, improve the overall portability and working efficiency, and reduce weight to improve mobility.

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

[0029] Easy maintenance, the rope drive structure has low maintenance cost. It only requires regular inspection of rope wear and tear, without the need for complicated hydraulic pipeline maintenance.

[0030] Versatility, widely used in firefighting, lighting, photography and other fields.

[0031] The intelligent force-controlled locking design dynamically adjusts the rope locking force through force sensors to ensure the stability of the lifting arm under wind resistance and multi-directional impact, achieving a breakthrough in wind and earthquake resistance.

[0032] The lifting arm of the present invention is designed with large-angle activity capability, and the forward and backward swing range can reach 160°, which has a larger working space than the traditional lifting arm. The expansion of the range of activity enables it to more flexibly adapt to various uses such as fire rescue, disaster relief, lifting lighting, and lifting photography, thereby enhancing the practical value of the product. Thus, the key shortcomings of the prior art are overcome, and it has broad market application prospects and technical advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the bow limb tensioning and raising arm in a raised state of the present invention;

[0034] Figure 2 for Figure 1 Rear view of the high arm with the middle bow section tensioned;

[0035] Figure 3a-3cIt is a schematic diagram of the structure of the bow limb tensioning and raising arm of the present invention in a folded state.

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

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1 and Figure 2 As shown in the structure, an embodiment of the present invention provides a bow limb tensioning and raising arm, which includes a body 4, an end 5, a left bow limb and / or a right bow limb; in the bow limb tensioning and raising arm, only the left bow limb or the right bow limb can be used, or the left bow limb and the right bow limb can be used at the same time; in this embodiment, the left bow limb and the right bow limb of the symmetrical structure are used as an example for explanation; the body 4 is used for bearing and moving, supporting the left bow limb, the right bow limb and the end 5, and supporting and carrying the left bow limb, the right bow limb and the end 5 to the required position by moving, so as to support the flexible deployment of the raising arm in different scenarios.

[0039] like Figure 2As shown, the left and right limbs are symmetrical structures. The bottom ends of the left and right limbs are both rotatably connected to the vehicle body 4, and the top ends are both fixedly connected to the end 5, forming a double limb structure to improve stability and avoid the problem of a single limb shaking left and right; the end 5 can be used for fire spraying, high-rise lighting, high-rise photography, etc.; the end 5 can be designed as a rotatable or retractable mechanism to further improve the flexibility and operating range of the lifting arm. The left and right limbs each include multiple limbs that are rotatably connected in sequence, a driving mechanism corresponding to each limb, and a tensioning mechanism; the driving mechanism is used to drive the corresponding limbs to rise and fall; the tensioning mechanism is used to cross-lock multiple limbs in the raised state, so that the limbs are tensioned to form a bow-shaped stable structure; the limbs are made of carbon fiber, high-strength composite materials or lightweight metal materials. High-strength composite materials, such as glass fiber composite materials, Kevlar, etc. Lightweight metal materials, such as aluminum alloys and magnesium alloys. The bow limbs are made of carbon fiber material, which has excellent elasticity and tensile strength, which not only reduces the weight of the equipment, but also improves the structural strength and reliability of the lifting arm. The bow limbs can also be made of mixed materials, by introducing honeycomb structures or foam core materials inside the bow limbs, optimizing the distribution of weight and strength, while enhancing impact resistance.

[0040] The above-mentioned bow limb tensioning and raising arm also includes a force sensor corresponding to the tensioning mechanism one by one; the force sensor is used to detect the resistance of the corresponding tensioning mechanism, thereby adjusting the tensioning force.

[0041] In this embodiment, the left and right limbs are provided with three limbs as an example for explanation, but the number of limbs is not limited to three, and can also be adjusted to single section, multiple sections, or different sections according to needs, and the number of sections of different limbs can be inconsistent, and can be designed according to the lifting distance and the size of the vehicle body 4 to adapt to complex application scenarios. Figure 1 , Figure 3a , Figure 3b as well as Figure 3cAs shown, the left bow piece includes a left first bow piece 1, a left second bow piece 2, a left third bow piece 3, a left first driving mechanism (not shown in the figure), a left second driving mechanism (not shown in the figure), a left third driving mechanism (not shown in the figure), a left first tensioning mechanism 12 and a left second tensioning mechanism 10; the left first driving mechanism is fixedly installed on the vehicle body 4, and is used to drive the left first bow piece 1 to swing, and the left first driving mechanism can raise and fold the left first bow piece 1; the left second driving mechanism is fixedly installed on the top of the left first bow piece 1, and is used to drive the left second bow piece 2 to swing, and the left second driving mechanism can raise and fold the left first bow piece 1. The left third bow piece 2 is raised and folded; the left third driving mechanism is fixedly installed on the top of the left second bow piece 2, which is used to drive the left third bow piece 3 to swing, and the left third driving mechanism can raise and fold the left third bow piece 3; the two ends of the left first tensioning mechanism 12 are connected between the bottom end of the left first bow piece 1 and the top end of the left second bow piece 2, which are used to lock the left first bow piece 1 and the left second bow piece 2 in the raised state; the two ends of the left second tensioning mechanism 10 are connected between the bottom end of the left second bow piece 2 and the top end of the left third bow piece 3, which are used to lock the left second bow piece 2 and the left third bow piece 3 in the raised state.

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

[0043] The two tensioning mechanisms of the left and right bow pieces are used for locking in the lifting state. The double-rope locking scheme is adopted, which is significantly better than the single-rope connection from beginning to end. This improvement not only effectively reduces the space occupied by the rope under the bow piece, but also further optimizes the compactness and adaptability of the structure, so that the lifting arm can still operate flexibly in complex environments even if it encounters obstacles. The ropes are cross-connected on the left and right sides of the bow piece to provide a more uniform distribution of locking force. The cross-locking method is similar to the X-shaped tension structure, which can effectively disperse the lateral and longitudinal forces, and is better than directly connecting a rope from beginning to end. The cross-locking of the elastic bow rope imitates the force principle of the cable-stayed bridge to disperse the force at the bow piece connection point in multiple directions, thereby improving the structural stability and seismic resistance of the lifting arm in the unfolded state. When the lifting arm is unfolded, the rope applies tension to keep the bow piece in an arc state, which enhances the stability and carrying capacity of the entire structure. The arc locking effect of the bow piece is as follows Figure 1 As shown in the figure, the reliability of the lifting arm in different working conditions is guaranteed, and the optimization of space utilization is fully considered. The double rope design realizes uniform transmission of tension through reasonable mechanical distribution, avoiding the concentrated force and breakage risks that may occur when using a single rope, thereby further improving the safety and durability of the entire lifting arm system. At the same time, each rope is equipped with a sensor, which can adjust the tension in real time according to the resistance.

[0044] While the left and right arch pieces meet the basic functions of the lifting arm, they also pay special attention to practicality in obstacle environments. The double tensioning mechanism layout can reduce the contact area between the rope and obstacles, and by accurately adjusting the locking angle and tension, it ensures that the lifting arm can be flexibly deployed in scenes with limited space. The overall structural design takes into account both functionality and practicality, providing a more efficient solution for applications in complex environments.

[0045] The left bow piece and the right bow piece also include a transmission mechanism that is connected between the corresponding bow piece and the driving mechanism, and the transmission mechanism is used to transmit the power generated by the driving mechanism to the corresponding bow piece to drive the corresponding bow piece 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 stepper motor, and the servo motor or stepper motor can also be used to directly drive the joint, reduce the intermediate transmission structure, and optimize efficiency and precision. The driving mechanism uses a rope transmission mechanism for transmission, replacing the traditional hydraulic drive method, reducing the complexity of the system and reducing the number of parts. When a rope transmission mechanism is used for transmission between the driving mechanism and the bow piece, the right first driving mechanism and the right first bow piece 8 are rope-transmitted via the right first rope 15, the right second driving mechanism and the right second bow piece 7 are rope-transmitted via the right second rope 13, and the right third driving mechanism and the right third bow piece 6 are rope-transmitted via the right third rope 14; the left first driving mechanism and the left first bow piece 1 are rope-transmitted via the left first rope 16, the left second driving mechanism and the left second bow piece 2 are rope-transmitted via the left second rope 18, and the left third driving mechanism and the left third bow piece 3 are rope-transmitted via the left third rope 17.

[0046] The cross-sectional shape of each of the above-mentioned bow pieces 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 belt, and can also be a belt made of a polymer composite material to meet the wear resistance and corrosion resistance requirements of different usage scenarios.

[0047] In the above-mentioned bow tensioning and lifting arm, an adjustable rigid support rod or damper can be added between the bows to further improve the wind and earthquake resistance. Introduce an active anti-shake device to monitor wind force and impact through sensors and adjust the balance of the lifting arm in real time. Intelligent and monitoring alternatives, add an intelligent control system, and combine AI algorithms to optimize the movement path and energy consumption of the lifting arm in real time. Provide remote monitoring functions through sensors and cameras to achieve fully automatic or semi-automatic operation.

[0048] The above-mentioned structure of the bow limb tensioning and raising the high arm 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 bow pieces and rope drive technology, the deadweight design of the lifting arm is optimized to reduce the weight of the equipment.

[0050] To reduce energy consumption: The rope drive system does not require continuous high-power energy supply, and only applies driving force during operation, which significantly reduces the energy consumption of the equipment.

[0051] To improve the stability of the lifting arm: when the lifting arm is fully extended, a cross-locking design with ropes is used, which is similar to the force principle of a cable-stayed bridge. It can effectively disperse and resist impact forces in multiple directions and maintain the stability of the system.

[0052] When the lifting arm is subject to wind resistance or lateral multi-directional impact, the double limb structure can automatically detect the change of force through the sensor, dynamically adjust the locking force of the left and right limb ropes, maintain the balance of the lifting arm with different force responses, and dynamically adjust the locking force with the force sensor and automatic adjustment system to improve the wind and earthquake resistance of the system. Significantly improve the wind and earthquake resistance effect, adapt to complex high-altitude working environments. Effectively avoid the left and right shaking caused by uneven force on the traditional single limb, ensure the stability and operating accuracy of the lifting arm during high-altitude operations, and improve the reliability of the system.

[0053] To reduce maintenance and use costs: The rope drive system is easy to install and maintain. Regular inspection or replacement of the rope is sufficient, eliminating the complex maintenance problems in the hydraulic system and reducing the user's operating costs.

[0054] To improve applicability and versatility: The present invention adopts a modular design so that the end 5 of the lifting arm can be installed with different functional modules (such as fire sprinklers, lighting equipment, cameras, etc.) to meet the needs of various scenarios.

[0055] Regarding the heavy weight: the double-bow elastic structure is made of carbon fiber material, which significantly reduces the weight of the equipment. Compared with the hydraulically driven lifting arm of the same specification on the market, the overall weight of the present invention is reduced by more than 40%, which is convenient for transportation and operation, and is particularly suitable for scenes requiring rapid response and portability. The reduction in the weight of the lifting arm significantly reduces the bearing pressure of the vehicle body 4 or chassis, and users can choose a more compact and low-cost load-bearing vehicle, thereby further reducing the overall cost of the equipment.

[0056] This product uses carbon fiber materials and a rope drive system, which reduces the complexity and manufacturing cost of the hydraulic drive system while ensuring performance. The weight of a 30-meter-high hydraulic-driven lifting arm on the market is about 3 tons. This solution reduces the weight by more than 40% and the cost by more than 60% at the same height. It is expected to be promoted at a more competitive price, so that the same weight can be lifted higher, the same lifting height can be lighter, and the same lifting height can be achieved at a lower price, meeting the needs of more scenarios and situations. For example: At present, a 100-meter-high lifting vehicle weighs about 65 tons and costs more than 30 million yuan. It is difficult to increase the height, otherwise the price and weight are unbearable. If this design is adopted, with the same lifting height, lighter and cheaper products can be produced, and the price and weight are reduced by more than half. When the weight and price remain unchanged, the lifting height can exceed the existing height by 60%, greatly improving the product indicators.

[0057] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A bow limb tensioning and raising arm, characterized in that: Including the body, left bow and end; The vehicle body is used for carrying and moving; The bottom end of the left bow piece is rotatably connected to the vehicle body, and the top end is fixedly connected to the end; the left bow piece includes a plurality of bow pieces rotatably connected in sequence, a driving mechanism corresponding to each bow piece, and a tensioning mechanism; the driving mechanism is used to drive the corresponding bow piece to rise and retract; the tensioning mechanism is used to cross-lock at least one bow piece in a raised state, so that the bow piece is tensioned to form a bow-shaped stable structure; the bow piece is made of carbon fiber.

2. The bow limb tensioning and raising arm according to claim 1, characterized in that: It also includes a right bow piece symmetrical to the left bow piece; the bottom end of the right bow piece is rotatably connected to the vehicle body, and the top end is fixedly connected to the end; the left bow piece and the right bow piece form a double bow piece structure to improve stability.

3. The bow limb tensioning and raising arm according to claim 2, characterized in that: Also included are force sensors corresponding one to one with the tensioning mechanisms; The force sensor is used to detect the resistance of the corresponding tensioning mechanism, so as to adjust the tensioning force.

4. The bow limb tensioning and raising arm according to claim 1 or 2, characterized in that: The left bow limb includes a first bow limb, a second bow limb, a third bow limb, 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 mounted on the vehicle body and is used to drive the first bow piece; The second driving mechanism is fixedly mounted on the top of the first bow limb and is used to drive the second bow limb; The third driving mechanism is fixedly mounted on the top of the second bow limb, and is used to drive the third bow limb; The two ends of the first tensioning mechanism are connected between the bottom end of the first bow limb and the top end of the second bow limb, and are used to lock the first bow limb and the second bow limb in the raised state; Two ends of the second tensioning mechanism are connected between the bottom end of the second bow limb and the top end of the third bow limb, and are used to lock the second bow limb and the third bow limb in the raised state.

5. The bow limb tensioning and raising arm according to claim 4, characterized in that: The left bow piece also includes a transmission mechanism that is transmission-connected between the corresponding bow piece and the driving mechanism.

6. The bow limb tensioning and raising arm according to claim 5, characterized in that: The transmission mechanism is a rope transmission mechanism, a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism.

7. The bow limb tensioning and raising arm according to claim 5, characterized in that: The driving mechanism is a servo motor or a stepping motor.

8. The bow limb tensioning and raising arm according to claim 1, characterized in that: The cross-sectional shape of the limb is arc, rectangular or elliptical.

9. The bow limb tensioning and raising arm according to claim 1, characterized in that: The rope in the tensioning mechanism is a high-strength fiber rope, a metal wire rope, a coated steel belt or a steel belt.

10. The limb tensioning and raising arm according to any one of claims 1 to 9, characterized in that: The bow piece adopts high-strength composite material or light metal material instead of carbon fiber.

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