Walking type fruit tree picking lifting platform

Abstract

The invention relates to the technical field of agricultural equipment, in particular to a walking type fruit tree picking lifting platform which comprises a moving module, a lifting module and a leveling device, the lifting module is arranged on the moving module, the moving module is used for driving the lifting module to move on the ground, a guardrail is installed on a carrying platform of the lifting module, and the leveling device is arranged on the carrying platform. The leveling device is used for changing the relative inclination angle of the action module and the lifting module, the leveling device is arranged in the action module, a support is arranged on the lifting module, a safety belt is installed on the support, a first rotating shaft is installed on the safety belt, and a safety vest is installed on the first rotating shaft. The rotating shaft I is connected with the upper back part of the safety vest. By providing a self-rescue means with low physical quality requirements for workers, the problem that fruit farmers cannot quickly rework after falling from the platform is solved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and equipment technology, specifically to a mobile fruit tree harvesting lifting platform. Background Technology

[0002] A mobile orchard harvesting lift is a type of mobile lifting equipment typically used in orchards to assist in fruit harvesting. Its main components include a movement module for movement and a lifting module for lifting. Classified by the number of people it can carry, orchard harvesting lifts can be divided into small harvesting lifts that carry only one person and large harvesting lifts that carry multiple people. Small harvesting lifts are characterized by their compact size and high flexibility, making them ideal for assisting fruit farmers in orchards with small planting spacing and wide tree canopies, such as lychee or longan orchards. Therefore, they are more popular with users who prefer orchards with such limited tree spacing.

[0003] During harvesting, the lifting module can move up and down to adjust the height of the platform, thereby changing the worker's working height and allowing them to easily access the fruit on the trees, facilitating harvesting and improving efficiency. In practice, some harvesting lifting platforms need to reach a working height of 3.5 meters to enable workers to pick fruit at the top of the trees. To ensure worker safety, these platforms are typically equipped with guardrails to prevent falls.

[0004] However, even with guardrails on the picking platform, workers still face the risk of falling. This is because, to avoid interference between the platform and the tree canopy, the platform is typically positioned outside the vertical projection of the canopy. This results in a greater distance between the platform and the center of the canopy, requiring workers to extend their upper bodies beyond the guardrail to reach fruit closer to the top center of the canopy. This significantly increases the risk of loss of balance and fall. It's important to emphasize that if a fall occurs, the worker's body will rotate around the top of the guardrail, causing them to hit the ground headfirst. This can lead to serious injuries such as concussion and cervical spine injuries.

[0005] One existing solution is to equip the lifting platform with safety belts to prevent workers from hitting the ground after a fall. This method only uses the tension of the safety belts to suspend the worker in mid-air to avoid impact, but it doesn't provide a device for the worker to return to the platform. Therefore, for single-operator workers suspended in mid-air, they can only rely on their own strength to climb back to the platform or wait for rescue. Climbing requires a certain level of physical strength, flexibility, and agility, so only workers with high overall physical fitness can quickly return to work. However, the average age of fruit farmers involved in orchard agriculture is over 37, accounting for about 88% of the total, with about 62% over 42. Therefore, when workers return to work by climbing, they are usually limited by their physical strength and other physical limitations, resulting in a longer recovery time. Waiting for rescue is not timely, as rescue takes time. In summary, both methods typically require workers to spend a considerable amount of time returning to work, affecting harvesting efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a walking fruit tree harvesting lifting platform, specifically designed with safety belts, to solve the problem of fruit farmers being unable to quickly resume work after falling from the platform.

[0007] As a means to achieve the above objectives, the present invention provides the following technical solution:

[0008] A mobile fruit tree harvesting lifting platform includes a movement module, a lifting module, and a leveling device. The lifting module is mounted on the movement module and is used to move the lifting module on the ground. A guardrail is installed on the platform of the lifting module. The leveling device is used to change the relative tilt angle between the movement module and the lifting module and is located within the movement module. The leveling device is powered by a pneumatic or hydraulic device. A support frame is mounted on the lifting module, and a safety belt is mounted on the support frame. A pivot is mounted on the safety belt, and a safety vest is mounted on the pivot, with the pivot connected to the upper back of the safety vest. The platform is characterized by: a pulling device on both the support frame and the safety vest to pull a fallen person back onto the platform using the safety belt; multiple stabilizing pistons driven by the power source of the leveling device to prevent the lifting platform from tipping over; and a triggering device on the support frame to control the extension of the stabilizing pistons by the impact force of a falling person on the safety belt.

[0009] To improve the comprehensibility of the following content, it should be noted in advance that the leveling device is existing technology. It consists of two cylinders or hydraulic cylinders symmetrically arranged at the connection between the moving module and the lifting module. This allows the control system to adjust the tilt angle of the lifting module relative to the moving module by controlling the extension and retraction of the cylinders or hydraulic cylinders. The adjustment angle is generally within the range of 0 to 12°.

[0010] Based on this scheme, the general working principle of the present invention is as follows: First, workers must wear safety vests when using the harvesting lifting platform. These vests can be either three-point or five-point. After donning the vests, the machine can be started for normal harvesting operations. If a worker loses balance and falls headfirst over the guardrail during operation, the safety belt and vest will catch them, preventing a fall. Simultaneously, a triggering device activates the air or hydraulic pump, which acts as a leveling device, causing a stabilizing piston to extend and support the platform on the ground. This prevents the platform from tipping over due to the impact of the fall, ensuring the worker is not injured by the platform's tilting. At this point, the worker is forced to hang upside down in the air. They can then operate the pulling device to lift themselves back onto the platform's carrying area, achieving self-rescue and quickly resuming work without waiting for assistance, reducing the time required to return to work.

[0011] Several points are worth noting: First, the reason why workers are suspended upside down in mid-air is because the tension of the safety belt and the supporting force provided by the guardrail interact, thus keeping the body in an upside-down position. Second, the reason why workers can still fall despite being restrained by the safety belt is that, in order to facilitate workers' movement and harvesting operations on the lifting platform, the safety belt needs to have a certain margin and cannot be fully taut during normal operation of the orchard lifting platform. Therefore, workers can still fall off the platform, but the tension of the safety belt will prevent them from falling to the ground.

[0012] Preferably, the traction device includes a base rotatably mounted on a bracket, a one-way clutch installed inside the base, a second rotating shaft inserted into the one-way clutch, and an end cap threadedly connected to the base for fixing the second rotating shaft to the one-way clutch. Multiple bosses are symmetrically and evenly arranged on the side wall of the second rotating shaft around its own axis, the height of which is exactly equal to the gap width between the rotating shaft and the base. The free end of the safety belt, not fixed to the bracket, passes through the gap between the rotating shaft and the base and exits therethrough, attaching to the top of the shoulder of the safety vest. The safety belt has multiple through holes for engaging with the bosses, and the edges of the through holes are hemmed using a weaving method.

[0013] The seatbelt can be divided into two sections by pivot point two: a fixed section near the end secured to the safety vest, and a tension section near the free end. With the end cap securing pivot point two to the one-way clutch, the one-way clutch restricts the rotation of pivot point two in one direction, ensuring that the length of the fixed section of the seatbelt can only be shortened and not lengthened. Conversely, the length of the free section of the seatbelt can only be lengthened and not shortened.

[0014] During normal operation, the end cap secures the second rotating shaft to the one-way clutch. Therefore, if a worker loses balance on the loading platform, flips over the guardrail, and falls headfirst, the fixed end of the safety harness cannot extend, preventing the worker from falling and leaving them suspended in mid-air. At this point, the worker removes the other end of the safety harness from the shoulders of their safety vest and pulls on it with both hands. Using the same ratchet principle as the second rotating shaft and the one-way clutch, they can pull themselves back onto the loading platform. With a slight vaulting motion, they can then cross the guardrail and return to the platform. This design allows workers to rest at any time during self-rescue, making it particularly beneficial for farmers with limited strength. Furthermore, since only upper limb strength is used, this invention reduces the demands on the worker's flexibility and agility, thus lowering the overall physical requirements for resuming work.

[0015] After a fall accident occurs and the worker has completed self-rescue, the worker can unlock the end cover, remove the second pivot, and adjust the length of the safety belt in the fixed section so that the safety belt does not hinder the worker's subsequent normal movement and work.

[0016] It's worth noting that when a worker is suspended upside down in mid-air by a safety harness, the bending and head-down movements required to observe their surroundings all require overcoming gravity. Combined with dizziness caused by blood rushing to the head, this makes it difficult for the worker to observe their environment and locate the free end of the safety harness, thus affecting self-rescue efficiency. Therefore, attaching the free end of the safety harness to the top of the shoulder of the safety vest allows the worker to quickly access the free end, thereby improving self-rescue speed. Additionally, the through-holes on the safety harness allow the worker to insert their thumbs to prevent the harness from slipping while pulling, ensuring that the worker can successfully pull themselves out by pulling the harness.

[0017] In addition, the following two points should be emphasized:

[0018] First, to prevent defects such as stitching breakage and tearing at the edges of the through-hole during use of the invention, and thus ensure the strength of the seat belt, certain protective measures should be taken for the edges of the through-hole. For example, a metal ring for edge protection can be installed, or the edges can be locked using a textile method. Preferably, a textile method should be used for locking the edges, specifically by repeatedly locking the edges of the through-hole using an overlock sewing machine. This avoids the problem of the seat belt being unable to bend along a local length due to the restriction of the metal ring. In other words, it allows the seat belt to be flexible along its entire length, which facilitates a tight fit between the seat belt and the side of the second pivot shaft. This ensures a uniform gap width between the second pivot shaft and the base, eliminating the need to reserve extra space within this gap to ensure smooth movement of the metal ring. This, in turn, reduces the design difficulty and size of the invention, while improving its manufacturability.

[0019] Secondly, to facilitate workers pulling on the safety belt without it getting stuck in their hands, the through hole should be designed to allow it to slide freely on the thumb. That is, the through hole should be able to slide down to the web of the hand. The diameter of an adult's thumb is generally 2.2 cm, and the diameter of the proximal interphalangeal joint of the thumb is generally 3 cm. Therefore, the diameter of the through hole should be at least 3 cm to allow the thumb to be inserted into it without causing the safety belt to get stuck in the hand. This facilitates self-rescue for the person who has fallen and ensures the efficiency of the self-rescue.

[0020] Preferably, the triggering device includes a fixed plate fixedly installed at the bottom of the bracket, and a switch electrically connected to the leveling device is provided at the bottom of the fixed plate. A turntable for triggering the switch is coaxially rotatably installed at the bottom of the fixed plate. When the stabilizing piston extends, it is inserted into the ground in an inclined outward and downward posture to prevent the lifting platform from overturning.

[0021] For ease of explanation, the following definition is made: Observing along the forward direction of the lifting platform (i.e., the forward direction of the action module), the lifting platform can be divided into left and right sides. Based on the above definition, the following explanation is provided: In the event of a fall, the switch is triggered, sending an electrical signal to the computer system. At this time, the computer system controls the stabilizing piston to extend outward and support itself on the ground to counteract the overturning moment generated by the worker's fall on the lifting platform, thereby preventing the lifting platform from tipping over and ultimately preventing injury to the worker from the lifting platform tipping over. After the worker returns to the lifting platform, the switch is released, stopping the sending of electrical signals to the computer system. The computer system then controls the stabilizing piston to retract, thus restoring the invention to its normal working state. Simultaneously, to prevent damage caused by overtravel of the stabilizing piston, it should be equipped with a travel limit switch.

[0022] It's worth noting that, for the sake of rationally planning the route to improve harvesting efficiency, the movement module generally doesn't point directly towards or away from the fruit trees. Therefore, the tree canopies are mostly located on the left and right sides of the lifting platform. Consequently, workers are usually positioned on these sides during harvesting operations, making falls more likely to occur on these sides. Correspondingly, the torque that causes the lifting platform to overturn is also concentrated on these sides. Therefore, priority should be given to ensuring that multiple stabilizing pistons extend evenly to the left and right sides of the lifting platform to guarantee their supporting effect.

[0023] Preferably, the action module is equipped with an energy storage cylinder for storing energy for the extension of the stabilizing piston; the energy storage cylinder is connected to the power source of the leveling device and a one-way valve is provided at the connection between the two; the energy storage cylinder is equipped with a solenoid valve electrically connected to the switch.

[0024] The solenoid valve is normally closed and only opens when the switch on the fixed plate is triggered. Based on this design, by using the accumulator and one-way valve, gas can be pre-charged into the accumulator to increase its internal pressure to the upper limit. Thus, at the moment a fall occurs and the switch triggers the solenoid valve to open, the stabilizing piston can immediately obtain maximum thrust without waiting for a gradual pressurization process. This allows the stabilizing piston to quickly extend an initial distance at the moment of the fall, enabling it to support the ground more quickly. In other words, it shortens the time required for the stabilizing piston to achieve its supporting function, thereby improving the stabilizing piston's response speed and ensuring that it can promptly provide support after a fall to better prevent the harvesting lifting platform from tipping over.

[0025] Meanwhile, the volume of the pipeline connecting the accumulator and the air pump (or liquid pump) is generally smaller than that of the accumulator. Therefore, the air pump (or liquid pump) only needs to output less medium to bring the pressure in the entire working pipeline to the set working pressure. This also helps to improve the response speed of the stabilizing piston.

[0026] Preferably, a blind hole is provided at the center of the bottom end of the fixed plate, and the opening of the blind hole has a chamfer. A conical platform that cooperates with the chamfer is rotatably installed at the center of the top end of the turntable. A spring is coaxially fixedly installed on the upper end of the conical platform, and the other end of the spring is fixedly installed at the bottom end of the blind hole.

[0027] In the absence of a fall, the spring tightly holds the conical platform at the opening of the blind hole and positions it using the chamfer of the blind hole to ensure a stable position. Consequently, the turntable is also positioned in a specific location, preventing it from being accidentally triggered by normal worker movement or minor collisions. This ensures that the lifting module's platform maintains a stable horizontal load surface in the absence of a fall, preventing workers from falling due to a tilted load surface.

[0028] Meanwhile, the spring also protects the two reset switches mounted at the bottom of the fixed plate. The reset switches need protection because, in the event of a drop, the turntable exerts an impact force on the reset switches to trigger the leveling device. This sudden impact can easily damage the reset switches, affecting their subsequent normal use. In this solution, the spring force acting on the turntable reduces the impact force when the turntable presses the reset switches, thus protecting them and ensuring their reliability.

[0029] Preferably, the free end of the safety belt protruding from the gap between the rotating shaft and the base is fixedly installed at the top of the shoulder of the safety vest by Velcro, and the hook side of the Velcro is fixedly installed on the safety vest.

[0030] By incorporating Velcro, the free end of the safety belt can be securely fixed to the safety vest, ensuring workers can easily access it when needed. Furthermore, since safety belts are typically made of textiles, the hook side of the Velcro is positioned on the safety vest. This allows the hook side to also be used to attach the safety belt when the worker pulls on it during self-rescue. Therefore, when a worker is exhausted and needs to pause during self-rescue, the safety belt can be fastened to the shoulder, ensuring it is always in a quickly and accurately accessible position, reducing the time spent searching for the safety belt and thus ensuring efficiency in self-rescue.

[0031] Preferably, the safety vest has a mounting plate fixedly installed on its back. The mounting plate has a mounting groove along the direction of the wearer's spine. Two sliding grooves are symmetrically opened on both sides of the mounting groove. The pivot is simultaneously movably installed in the two sliding grooves. A limiting device is installed in the sliding groove to restrict the pivot to the top of the sliding groove when no fall accident occurs. When a fall accident occurs, the limiting device releases the pivot so that it can slide freely in the sliding groove.

[0032] Generally, the human body's center of gravity is located at approximately 55% of its height, roughly between the waist and hips. However, to avoid hindering workers' routine work, the connection point between the safety belt and the safety vest is usually located on the upper back of the safety vest. The distance between these two is typically around 35cm to 50cm. Therefore, when a worker falls headfirst, their center of gravity is actually above the point of contact with the safety belt. At this point, the worker's center of gravity still tends to fall downwards, potentially causing a lateral rollover while suspended, resulting in secondary injury. To address this, a mounting groove and a sliding groove are created, with a pivot point movably installed within the sliding groove. When the worker falls, the pivot point slides along the worker's spine towards their legs, bringing the safety belt's point of contact closer to or even above the worker's center of gravity. This reduces or even completely eliminates the risk of lateral rollover while suspended, thus preventing secondary impact injuries.

[0033] It is important to note that because the pivot can slide within the chute, it has a tendency to fall to its lowest position, potentially leading to two scenarios: 1. The safety belt tauts naturally, eliminating the allowance and preventing the worker from moving freely on the lifting platform; 2. The pivot falls to the worker's waist, causing the safety belt to dangle at waist height, thus hindering the worker from placing fruit. Therefore, to ensure the safety belt does not obstruct the worker's normal work and movement, a limiting device is installed. In the absence of a fall, the pivot is fixed to the upper back of the safety vest. However, in the event of a fall, the impact force can cause the pivot to break through the limiting device and move rapidly within the chute.

[0034] Specifically, the working principle of the limiting device is as follows: When no fall occurs, the fixed plate and the limiting groove are snapped together, confining the rotating shaft within the limiting groove, thus preventing it from sliding freely within the groove. However, in the event of a fall, the impact force causes the rotating shaft to strike the fixed plate, forcing the snap-fit ​​connection between the fixed plate and the limiting groove to disengage, allowing the rotating shaft to slide. Thanks to this snap-fit ​​connection, the components of this invention can be easily restored to their original installation position afterward. Furthermore, to facilitate personnel reaching into the mounting groove for resetting the invention, the width of the mounting groove should be no less than 2.2 cm. This value is selected with reference to the average diameter of the thumb mentioned earlier. Considering that the thumb is the largest finger in diameter among the five fingers of the hand, simply selecting a mounting groove width no less than the diameter of the thumb is sufficient for the operator to easily reach into the mounting groove to reset the fixed plate.

[0035] It is worth noting that the limiting groove is located on the side of the sliding groove away from the wearer's body because during normal work, assuming no fall occurs, the rotating shaft will inevitably experience some tension. This tension poses a risk of misaligning the latch between the fixing plate and the limiting groove, thus failing to restrict the sliding of the rotating shaft. This positioning of the limiting groove prevents this from happening, as the tension on the rotating shaft will no longer act on the fixing plate when no fall occurs. Furthermore, even if the rotating shaft is pressed towards the fixing plate, it will be supported by the wearer's back, preventing it from breaking through the limiting device and effectively improving the reliability of the invention.

[0036] In summary, the beneficial effects of this invention are mainly reflected in the following aspects:

[0037] Firstly, for fruit tree harvesting lifting platforms equipped with safety belts, the issue of fruit farmers being unable to quickly return to work after falling from the platform is addressed. To this end, a traction device is installed to provide workers with a self-rescue method that requires minimal physical strength. This allows workers to return to the lifting platform after a fall by simply using their upper limbs to pull on the safety belt. This solves the problem of the long recovery time after a fall while reducing the physical demands on workers' flexibility and agility.

[0038] Secondly, by changing the point of force exerted on the worker's body by the safety belt in the event of a fall, it ensures that the worker will not suffer secondary impact injuries due to lateral rollover during a fall. Simultaneously, to prevent the safety belt from hindering the worker's normal work and movement when the lifting platform is in operation, a limiting device is installed to keep the safety belt at a specific height when no fall has occurred, and to release the limiting device in the event of a fall so that the safety belt can function normally.

[0039] Thirdly, ensuring workers can quickly access their safety belts after a fall accident improves self-rescue efficiency. To this end, Velcro is installed so that the free end of the safety belt can be securely fixed to the top of the shoulder of the safety vest. The hook side of the Velcro is also located on the safety vest, allowing workers to attach the safety belt using the hook side during self-rescue. Therefore, even if a worker is too tired to continue the rescue and needs to stop, the safety belt remains readily accessible, reducing the time spent searching for it and further ensuring efficiency. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 for Figure 1 Enlarged view of section A;

[0042] Figure 3 for Figure 2 A schematic diagram showing the fit between the central sliding groove and the rotating shaft.

[0043] Figure 4 Side view of the safety vest;

[0044] Figure 5 for Figure 4 Enlarged view of section B;

[0045] Figure 6 for Figure 4 Enlarged view of section C;

[0046] Figure 7 For Figure 1 Half-sectional view of the observation triggering device in the S-direction;

[0047] Figure 8 for Figure 1 A cross-sectional view of the action module in section DD.

[0048] In the diagram: 1. Action module; 2. Lifting module; 3. Bracket; 4. Safety vest; 5. Safety belt; 6. Base; 11. Energy storage cylinder; 12. Solenoid valve; 13. Check valve; 14. Hydraulic pump; 15. Stabilizing piston; 16. Solenoid directional valve; 41. Mounting plate; 42. Fixing ring; 43. Velcro hook side; 44. Mounting groove; 51. Through hole; 52. Velcro rough side; 61. Switch; 62. Conical platform; 63. Turntable; 64. Spring; 65. End cap; 66. Rotating shaft two; 411. Slide groove; 412. Rotating shaft one; 413. Limiting groove; 414. Fixing plate; 661. Boss. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Figures 1 to 8 The diagram illustrates a specific embodiment of the present invention. The power source for the leveling device is a hydraulic pump 14.

[0050] The detailed settings in this embodiment are as follows: First, for ease of wearing, the safety vest 4 is a three-point type, and its length can be adjusted by a sliding buckle (not shown in the figure) to extend its hem to the wearer's waist, so that the mounting plate 41 can be fixed to the safety vest 4 along its entire length; Second, the safety belt 5 is made of polyester, polypropylene, and nylon webbing, with a width of 5cm and a thickness of 2mm. The diameter of the through holes 51 on the safety belt 5 is 3cm, and the edges of the through holes 51 are overlocked by a weaving method using an overlock sewing machine. The distance between the center points of adjacent through holes 51 on the safety belt 5 is 5cm; Third, the leveling device is symmetrical. Two undulating hydraulic cylinders (not shown in the figure) are installed at the connection between the action module 1 and the lifting module 2. These two undulating hydraulic cylinders and two stabilizing pistons 15 share the same hydraulic pump 14 as their power source. Switching between them during use is achieved through an electromagnetic reversing valve 16. Fourth, a cylindrical boss 661 is provided on the rotating shaft 66. The distance between the center of the root of adjacent bosses 661 along the circumference of the rotating shaft 66 is 5cm. The height of the boss 661 is 1cm. Correspondingly, the gap width between the rotating shaft 66 and the base 6 should be 1cm, but to ensure the smooth rotation of the rotating shaft 66, the final gap width is 1.1cm. Fifth, a one-way clutch is adopted. A roller clutch is used; sixth, in order to reduce the probability of the turntable 63 being accidentally triggered, while ensuring that it can flip to trigger the switch 61 in the event of a fall, the spring 64 is provided with a preload of 350N to make the conical platform 62 fit with the opening of the blind hole; sixth, the rotating shaft 412 is manufactured by wrapping a PVC plastic layer with stainless steel, and the mounting plate 41 is made of the same PVC plastic material. Thus, the rotating shaft 412 can have the strong load-bearing capacity of stainless steel, while utilizing the friction coefficient of approximately 0.4 between the PVC materials to extend the time that the lifting platform can withstand the impact force when a worker falls, thereby reducing the impact on the lifting platform. The magnitude of the overturning force is better designed to prevent the lifting platform from injuring workers due to tipping over; seventh, four stabilizing pistons 15 are evenly and symmetrically arranged on both sides of the lifting platform, and the four stabilizing pistons 15 share one accumulator cylinder 11. Correspondingly, four solenoid valves 12 and four one-way valves 13 are provided, and the four solenoid valves 12 are controlled simultaneously by switch 61; eighth, a pressure sensor electrically connected to the computer control system of the harvesting lifting platform is provided on the inner wall of the accumulator cylinder 11 to control the internal pressure of the accumulator cylinder 11 to meet the requirements after receiving air; ninth, a stroke limit switch is provided on the stabilizing piston 15, which is existing technology and will not be described in detail.

[0051] During the operation of the harvesting lifting platform, if a worker on the 3m high platform loses balance and falls headfirst over the left guardrail, the safety belt 5, connected to the safety vest 4, pulls the worker in place, preventing a fall. Simultaneously, the impact force of the worker on the safety belt 5 triggers two actions of the invention: First, the tension in the safety belt 5 pulls the turntable 63, overcoming the upward tension of the spring 64, causing it to flip. This triggers switch 61, opening four solenoid valves 12 simultaneously. The pressure stored in the accumulator 11 is then applied to the four stabilizing pistons 15, causing them to extend and insert into the ground to support the harvesting lifting platform and prevent it from tipping over. Second, under the impact force, the rotating shaft 412 breaks through the constraint of the fixed plate, allowing it to slide within the groove 411. This shifts the point of force of the safety belt 5 above the worker's center of gravity, preventing a side fall. After this, the worker is suspended upside down in mid-air.

[0052] Then, the worker can raise their hands to the shoulders of the safety vest 4 and tear off the Velcro to obtain the free end of the safety belt 5 within 1-2 seconds. Next, they can insert their thumbs into the through hole 51 and pull the safety belt 5 downwards to rise upwards. After that, by pulling the safety belt 5 with both hands in sequence and using the one-way locking action of the one-way clutch, the worker can gradually rise upwards until their waist and abdomen touch the upper edge of the guardrail. At this point, the worker can curl up and grab the guardrail with both hands to use the force to climb back onto the loading platform, thus completing the self-rescue.

[0053] If a worker is too exhausted to continue pulling the safety belt 5 during the self-rescue process, he / she can directly release his / her arm to rest. At this time, the safety belt 5 is stably positioned on the shoulder of the safety vest 4 under the action of the fixing ring 42 and the Velcro hook 43, so that the worker can obtain the free end of the safety belt 5 within 1 to 2 seconds after resting and continue self-rescue.

[0054] After completing the self-rescue, the worker removes the end cap 65 and takes out the second rotating shaft 66 to adjust the length of the fixed section of the safety belt 5 to a length suitable for the worker to move and work on the picking lifting platform. At the same time, the worker resets the first rotating shaft 412 into the limiting groove 413 and inserts his finger into the mounting groove 44 to hook the fixing plate 414 and pulls it back to engage with the limiting groove 413, thereby limiting the first rotating shaft 412. Finally, the second rotating shaft 66 and the end cap 65 are reinstalled, thus completing the reset of the present invention. During this process, switch 61 has been released, so no electrical signals are sent to the computer system. At this time, hydraulic pump 14 first draws oil from accumulator 11 to allow stabilizing piston 15 to retract into the moving module 1, thus not hindering the movement of the harvesting lifting platform. Subsequently, when stabilizing piston 15 retracts to the end of its stroke, it triggers the stroke limit switch and stops. At the same time, all solenoid valves 12 close. Then, hydraulic pump 14 pumps oil into accumulator 11 to increase pressure. When the pressure in accumulator 11 reaches its maximum value, it triggers the pressure sensor, which then controls hydraulic pump 14 to stop pumping oil. Under the action of check valve 13 and solenoid valve 12, the pressure in accumulator 11 is maintained to prepare for the next emergency response. At this time, the invention is completely restored to its initial state.

[0055] After the fall, the worker was pulled up to a height of 1.5m using safety belt 5 during the self-rescue process, which took 36 seconds.

[0056] It should be emphasized that, based on the content described above, although the beneficial effects of the present invention have been explained in detail and corresponding specific embodiments have been provided, those skilled in the art can still achieve the same technical effects by making conventional substitutions, modifications, or other alterations to the given technical solutions without creative effort, provided they fully understand the working principle of the present invention. However, such modifications should not be considered as exceeding the scope of the present invention. Specifically, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A walking fruit tree picking lifting platform, comprising a movement module (1), a lifting module (2), and a leveling device, wherein the lifting module (2) is mounted on the movement module (1), the movement module (1) is used to drive the lifting module (2) to move on the ground, a guardrail is installed on the loading platform of the lifting module (2), the leveling device is used to change the relative tilt angle between the movement module (1) and the lifting module (2), and the leveling device is located inside the movement module (1), the leveling device is powered by a pneumatic device or a hydraulic device, a bracket (3) is provided on the lifting module (2), a safety belt (5) is installed on the bracket (3), a rotating shaft (412) is installed on the safety belt (5), a safety vest (4) is installed on the rotating shaft (412), and the rotating shaft (412) is connected to the upper back of the safety vest (4); characterized in that: The support (3) and safety vest (4) are both equipped with a traction device that uses a safety belt (5) to pull a fallen person back to the carrying platform. The action module (1) is equipped with multiple stabilizing pistons (15) driven by a power source of a leveling device to prevent the lifting platform from overturning. The support (3) is equipped with a triggering device that uses the impact force of the fallen person on the safety belt (5) to control the extension of the stabilizing pistons (15).

2. The walking fruit tree picking lifting platform according to claim 1, characterized in that: The traction device includes a base (6) rotatably mounted on a bracket (3). A one-way clutch is installed inside the base (6). A rotating shaft (66) is fixedly inserted into the one-way clutch. An end cap (65) for fixing the rotating shaft (66) to the one-way clutch is threaded onto the base (6). Multiple bosses (661) are provided on the side wall of the rotating shaft (66) in a symmetrical and uniform manner around its own axis. The height of the multiple bosses (661) is... The width is exactly equal to the gap between the second pivot (66) and the base (6). The free end of the safety belt (5) that is not fixed to the bracket (3) passes through the gap between the second pivot (66) and the base (6) and exits through it and is installed at the top of the shoulder of the safety vest (4). The safety belt (5) has multiple through holes (51) for engaging with the boss (661). The diameter of the through holes (51) is 3cm, and the edges of the through holes (51) are locked by a weaving method.

3. The walking fruit tree harvesting lifting platform according to claim 1, characterized in that: The triggering device includes a fixed plate fixedly installed at the bottom of the bracket (3). The bottom of the fixed plate is provided with a switch (61) electrically connected to the leveling device. The bottom of the fixed plate is coaxially mounted with a turntable (63) for triggering the switch (61). When the stabilizing piston (15) extends, it is inserted into the ground in an inclined outward and downward posture to prevent the lifting platform from overturning. The stabilizing piston (15) is provided with a travel limit switch.

4. The walking fruit tree harvesting lifting platform according to claim 3, characterized in that: The action module (1) is equipped with an energy storage cylinder (11) for storing energy for the extension of the stabilizing piston (15); the energy storage cylinder (11) is connected to the power source of the leveling device and a one-way valve (13) is provided at the connection between the two; the energy storage cylinder (11) is equipped with a solenoid valve (12) electrically connected to the switch (61).

5. A walking fruit tree harvesting lifting platform according to claim 3, characterized in that: A blind hole is provided at the center of the bottom end of the fixed plate. The opening of the blind hole has a chamfer. A conical platform (62) that cooperates with the chamfer is rotatably installed at the center of the top end of the turntable (63). A spring (64) is coaxially fixedly installed at the upper end of the conical platform (62) to prevent the switch (61) from being accidentally triggered and damaged at the same time. The other end of the spring (64) is fixedly installed at the bottom end of the blind hole.

6. The walking fruit tree harvesting lifting platform according to claim 2, characterized in that: The free end of the safety belt (5) that passes through the gap between the rotating shaft (66) and the base (6) is fixedly installed at the top of the shoulder of the safety vest (4) by Velcro, and the hook side of the Velcro is fixedly installed on the safety vest (4).

7. A walking fruit tree harvesting lifting platform according to claim 2, characterized in that: The safety vest (4) has a mounting plate (41) fixedly installed on its back. The mounting plate (41) has a mounting groove (44) along the direction of the wearer's spine. Two sliding grooves (411) are symmetrically opened on both sides of the mounting groove (44). The pivot (412) is simultaneously installed in the two sliding grooves (411). A limiting device is installed in the sliding groove (411) to restrict the pivot (412) to the top of the sliding groove (411) when no fall accident occurs. When a fall accident occurs, the limiting device releases the pivot (412) so that it can slide freely in the sliding groove (411).

8. A walking fruit tree harvesting lifting platform according to claim 6, characterized in that: The limiting device includes a limiting groove (413) opened on the side of the upper end of the slide groove (411) away from the wearer's body. The limiting groove (413) cooperates with the rotating shaft (412). The upper end of the slide groove (411) is fixedly equipped with an elastic fixing plate (414) for fixing the rotating shaft (412) in the limiting groove (413). The width of the mounting groove (44) is not less than 2.2cm.

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