Automatic pruning device for highway green belt

Abstract

The invention relates to the technical field of green belt trimming application, in particular to an automatic highway green belt trimming device which comprises a cross beam, a limiting assembly, a trimming assembly and a smashing assembly.The automatic highway green belt trimming device is exquisite in design, compact in size and capable of working under the condition of not occupying too much space; the cross beam serves as a main structural part, the supporting legs are vertically fixed to the bottom end of the cross beam, the advancing wheels are installed at the bottom ends of the supporting legs, and through the design, the device can move front and back on an expressway without occupying too much lane space, pruning work can be completed without arranging a roadblock, integration of a hub motor enables the advancing wheels to have the self-walking function, and the practicability is high. Therefore, the trimming device can move autonomously without additional traction or pushing force, the self-walking function greatly improves the efficiency of trimming operation, reduces the labor intensity of workers, and enables the trimming operation to be more flexible and quicker.

Description

Technical Field

[0001] The invention relates to the technical field of green belt trimming applications, in particular to an automatic green belt trimming device for a highway. Background Art

[0002] While the green belts on both sides of the highway provide aesthetic and ecological benefits, they also face challenges in management and maintenance. The pruning of the green belts is not only related to the beauty of the road, but also involves driving safety and ecological balance. The traditional manual pruning method is inefficient and has safety hazards. Therefore, the introduction of highway green belt pruning devices is particularly important.

[0003] However, the existing highway green belt pruning device has certain defects during use. The existing highway green belt pruning device is bulky and occupies too much space, which affects traffic when operating on the highway. The existing highway green belt pruning device is not flexible enough and cannot adapt to green belts of different sizes. In addition, it cannot adapt to highway guardrails of different shapes and widths, which reduces the versatility and applicability. The branches and leaves pruned by the existing highway green belt pruning device may not be properly handled, resulting in a messy work site and affecting the cleanliness of the environment. The existing highway green belt pruning device cannot effectively avoid obstacles when encountering obstacles, resulting in interruption of the pruning operation, affecting the continuity and safety of the operation. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides an automatic pruning device for a highway green belt.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an automatic pruning device for highway green belts, including a crossbeam, a limiting component, a pruning component and a crushing component, a support leg is vertically fixed to the bottom end of the crossbeam, and a forward wheel is installed at the bottom end of the support leg, and a plurality of suspension rods are vertically fixed to the bottom of the crossbeam, and a plurality of rubber wheels are lifted and matched near the bottom on one side of the suspension rods, and the rubber wheels roll and match on the side of the guardrail to limit the travel route of the pruning device and ensure that the pruning device can stably move along the predetermined path of the guardrail, and the use of rubber wheels will not cause wear on the guardrail. When the rubber wheels come into contact with the guardrail, friction and wear can be reduced. The rubber wheels can be raised and lowered to facilitate obstacle avoidance. When encountering obstacles on the guardrail, such as guardrail pillars, the rubber wheels can be lowered and retracted, so that the pruning device can go over the obstacles and continue to operate. In addition, the rubber wheels are set to roll on the side of the guardrail and cooperate with the device as a whole to clamp the guardrail in the middle, so that the The pruning device will not detach from the guardrail, and several of the limit assemblies are vertically installed at the bottom of the beam, and the crushing assembly is fixed on one side of the beam. The crushing assembly is fixed on one side of the beam and is used to crush the pruned branches and leaves. This design allows the pruned branches and leaves to be processed directly on site. A support column is vertically fixed to the top of the beam, and two pruning assemblies are respectively installed at the middle height of the support column and at the top height of the support column, wherein the pruning assembly at the middle height of the support column is horizontally arranged and located directly above the crushing assembly, and the pruning assembly at the top height of the support column is vertically arranged downward and located directly above the end of the crushing assembly away from the beam. The two pruning assemblies are respectively installed at the middle and top of the support column, one is horizontally arranged and the other is vertically arranged downward, so that the side and top of the green belt of the highway can be pruned respectively. This design allows the pruning device to process multiple surfaces of the green belt at one time; Among them, the limiting assembly includes a square tube, a telescopic tube and two clamping wheels, the square tube is vertically fixed at the bottom of the beam, the telescopic tube is telescopically fitted in the square tube from the bottom opening of the square tube, the two clamping wheels are respectively installed on the square tube and the telescopic tube, and the two clamping wheels are aligned up and down, and the limiting assembly provides a stable working platform for the pruning device through the close combination of the clamping wheels and the guardrail, ensuring the accuracy and stability during the pruning process, and the coordinated use of the square tube and the telescopic tube in the limiting assembly enables the distance between the two clamping wheels to be adjusted, and by adjusting the distance between the two clamping wheels in the limiting assembly, the pruning device can adapt to high-speed guardrails of different upper and lower widths and shapes, and by adjusting the positions of the two clamping wheels, the pruning device can fit closely to the guardrail.

[0006] Preferably, the forward wheel comprises a connecting seat, a front fork and a hub motor, the connecting seat is fixed at the bottom end of the support leg, the front fork has an inverted "U"-shaped structure, the front fork rotates and fits at the bottom of the connecting seat, the hub motor is installed between the front fork, and a shock-absorbing spring is provided on the front fork. The shock-absorbing spring can effectively absorb the impact caused by uneven road surface, reduce the vibration of the trimming device, and improve the driving stability of the trimming device. Due to the presence of the shock-absorbing spring, the trimming device can better adapt to complex and changeable terrain conditions. The integration of the hub motor enables the forward wheel to have a self-propelled function, which means that the trimming device can move autonomously without additional traction or propulsion. The self-propelled function provided by the hub motor, combined with the shock-absorbing effect of the shock-absorbing spring, enables the trimming device to move quickly and stably on various terrains.

[0007] Preferably, the cross-sections of the two clamping wheels in the limit assembly are both in an "H"-shaped structure, and the clamping wheels with the "H"-shaped structure can be firmly clamped on the edge of the guardrail. This design prevents the clamping wheels from deviating or falling off when rolling. The limit assembly also includes a limit rod, which is vertically fixed in the square tube. The limit rod runs through the entire telescopic tube from the top of the telescopic tube. The telescopic tube and the limit rod are slidably matched. A thread is provided near the bottom of the limit rod. The threaded bottom end of the limit rod is threadedly matched with a limit nut. An adjusting spring is sleeved on the limit rod between the limit nut and the bottom end of the telescopic tube. The sliding fit between the positioning rod and the telescopic tube, as well as the fit between the thread and the limit nut, allow the limit assembly to be fine-tuned to adapt to different guardrail shapes. The adjusting spring is sleeved on the limit rod, between the limit nut and the bottom end of the telescopic tube, to act as a shock absorber. In addition, the adjusting spring provides the necessary elastic force so that the clamping wheel can fit tightly against the guardrail, ensuring that the trimming device will not be displaced or fall off during operation. The use of the adjusting spring ensures that the clamping wheel reduces rolling resistance while clamping, achieves smooth rolling, balances the pressure of the clamping wheel on the guardrail, and reduces the friction between the clamping wheel and the guardrail.

[0008] Preferably, the bottom end of the boom close to the crushing assembly is hinged with two sets of connecting rods arranged in parallel, and the ends of the two sets of connecting rods away from the boom are hinged with a mounting block. The internal space composed of the boom, the two sets of connecting rods and the mounting block is a parallelogram structure, the rubber wheel rotates horizontally and is fitted on the top of the mounting block, one side of the boom is lifted and lowered with a lifting block, a steel wire rope is connected between the lifting block and the mounting block, a slide rail is vertically welded at one end of the boom, a rolling groove is opened on one side of the boom, and a screw rod is vertically rotated on the side of the boom away from the rolling groove, and the boom is away from the rolling groove. A lifting drive motor for driving the screw rod to rotate is vertically installed on the upper part of one side of the rolling groove. The cross-section of the lifting block is an "L"-shaped structure. A slider is fixed on the side of the lifting block close to the slide rail. The slider slides and fits on the slide rail. The side of the lifting block close to the rolling groove is rotated and fitted with a roller. The roller rolls and fits in the rolling groove. A lifting nut is horizontally fixed on the lifting block. The lifting nut is threadedly fitted on the screw rod. The lifting drive motor drives the screw rod to rotate, so that the lifting nut moves, and the lifting nut drives the lifting block to move, so that the lifting block can be raised and lowered. The lifting block is The installation block is moved by pulling the wire rope, and the lifting and lowering adjustment of the rubber wheel is realized through the movement of the installation block. The internal space composed of the suspension rod, the two sets of connecting rods and the installation block is a parallelogram structure. This structure allows the horizontal position of the rubber wheel to be maintained during the lifting process, ensuring that the contact between the trimming device and the guardrail is always consistent. Due to the use of the two sets of connecting rods, the lifting route of the installation block is an arc structure. In this way, when the lifting block moves upward, the installation block can extend to the back side of the guardrail through the rotation of the two sets of connecting rods, so that the rubber wheel is close to the back side of the guardrail. When the lifting block moves downward, the installation block can be retracted from the back side of the guardrail to the device body through the rotation of the two sets of connecting rods, so that the rubber wheel is transferred from the back side of the guardrail to between the guardrail and the device. The sending and retraction of the rubber wheel is realized through the arc lifting route of the installation block, thereby realizing the avoidance of the guardrail pillar and realizing the avoidance function. The slider is slidably matched on the slide rail. This matching method enables the lifting block to move up and down along the slide rail smoothly, reducing friction and wear. The roller is rollingly matched in the rolling groove, and this matching method also reduces friction.

[0009] Preferably, a plurality of support blocks are horizontally arranged directly below the cross beam, one end of the support block is fixed on the square tube, and the other end of the support block is fixed on the hanger or the leg, and a wind power generation component is installed on the top of the plurality of support blocks, the wind power generation component includes a connecting piece, a fan blade and a generator, the connecting piece is fixed on the top of the support block, the fan blade rotates and fits on the top of the connecting piece, the generator is installed in the connecting piece, and a transmission shaft is connected between the generator and the fan blade. The wind power generation component includes a connecting piece, a fan blade and a generator, which can convert wind energy into electrical energy and provide part or all of the required electricity for the pruning device. By utilizing wind energy to generate electricity, the pruning device can achieve energy conservation and emission reduction and reduce the consumption of fossil energy. The setting of the wind power generation component makes full use of the wind energy in the natural environment and the airflow caused by high-speed vehicles to convert them into electrical energy.

[0010] Preferably, a cross bar is horizontally fixed near the top of one side of the support column, and a solar panel is horizontally fixed on the top of the cross bar. The provision of the solar panel allows the pruning device to utilize solar energy to generate electricity and provide energy for the fan and other electric components. The use of such renewable energy reduces dependence on external power sources. A connecting rod is vertically fixed below the middle of the cross bar, and a long mounting rod is horizontally fixed to the bottom of the connecting rod. A pruning assembly is vertically installed in the middle of the long mounting rod, and fans are installed at both ends of the long mounting rod. The fans are designed to blow the pruned branches and leaves toward the crushing assembly, which can speed up the collection and processing of the branches and leaves. A short mounting rod is horizontally fixed in the middle of one side of the support column, and a pruning assembly is horizontally installed at one end of the short mounting rod away from the support column.

[0011] Preferably, the two trimming components each include a fixed plate, a trimming drive motor and a trimming cable, the two fixed plates are respectively mounted on the middle part of the long rod and the end part of the short rod, one of the trimming drive motors is vertically fixed on the fixed plate on the middle part of the long rod, and the other trimming drive motor is horizontally fixed on the fixed plate on the end part of the short rod, and the two trimming cables are respectively connected to the output ends of the two trimming drive motors through rotating shafts. As a key part of the trimming component, the trimming cable has a long service life and low cost. Due to the durability of the cable, it is not easy to be damaged, which reduces the frequency of maintenance and replacement. The length of the trimming cable can be flexibly selected according to the width and height of the green belt, which enables the trimming device to adapt to green belts of different sizes, enabling it to work effectively in a variety of different green belt scenarios. In addition, when the trimming cable encounters a hard object, it will not get stuck or damaged like some vulnerable parts.

[0012] Preferably, the crushing assembly includes a crushing box, a crushing motor and a blower. The crushing box is fixed on one side of the cross beam. The top of the crushing box is provided with an opening for receiving fallen leaves. A discharge nozzle is obliquely arranged on the side of the bottom of the crushing box away from the cross beam. The design of the discharge nozzle allows the crushed branches and leaves to be smoothly discharged from the crushing box. Since the discharge nozzle is inclined, it can not only discharge the crushed materials to avoid blockage inside the crushing box, but also directionally discharge the crushed branches and leaves to the green belt to avoid scattering of the crushed materials. At the same time, the crushed branches and leaves can be used as organic fertilizer to provide nutrients for plants in the green belt. A connecting plate is fixed at the bottom of the installation short rod, and the crushing motor is vertically fixed on the connecting plate. A crushing blade is connected to the rotating shaft, and the crushing blade rotates and fits in the crushing box. The crushing assembly achieves rapid crushing of the pruned branches and leaves through the cooperation of the crushing box, the crushing motor and the crushing blade. The crushing motor drives the crushing blade to rotate at high speed in the crushing box to break the branches and leaves into smaller debris. The hair dryer is horizontally fixed on the side of the beam close to the crushing box. A blow pipe is connected to the air outlet of the hair dryer, and one end of the blow pipe is inserted into the crushing box. The hair dryer and the blow pipe are used in combination to blow the crushed branches and leaves in the crushing box to the discharge nozzle. This cooperation not only avoids the accumulation of crushed branches and leaves in the crushing box and affects the subsequent crushing efficiency, but also ensures the smooth discharge of the crushed branches and leaves.

[0013] Preferably, a baffle is fixed on the crossbeam and the support column, and a leaf falling slide is obliquely arranged on the lower part of the baffle near one end of the crossbeam, and the bottom end of the leaf falling slide is aligned with the top opening of the crushing box. The baffle plate prevents the pruned branches and leaves from flying around, which can reduce pollution to the surrounding environment and keep the working area clean, while also avoiding the impact of branches and leaves on passing vehicles and improving road driving safety. The baffle plate can also prevent branches and leaves from accumulating on the pruning device to avoid affecting the normal operation of the device due to the accumulation of branches and leaves. The design of the baffle plate and the leaf falling slide can prevent branches and leaves from falling onto the highway pavement, keep the pavement clean, and reduce the risk of road slippage caused by branches and leaves. The design of the leaf falling slide ensures that most of the pruned branches and leaves can smoothly enter the crushing box for crushing.

[0014] Preferably, a reflective sheet is fixed to the outside of the baffle plate, and warning lights are installed at both ends of the top of the beam. The arrangement of the reflective sheet and the warning light significantly improves the visibility of the pruning device during operation. The reflective sheet can reflect the lights of surrounding vehicles, and the warning light flashes to emit obvious light signals to remind passing vehicles and personnel to pay attention to the pruning operation area. The design of the reflective sheet and the warning light enables the pruning device to adapt to different working environments, whether it is day or night, or under different weather conditions, to ensure the safety and efficiency of the operation.

[0015] Beneficial effects of the present invention: (1) In the present invention, the automatic mowing device for the highway green belt is exquisitely designed and compact in size. It can be operated without occupying too much space. The crossbeam is used as the main structural member. The bottom end of the crossbeam is vertically fixed with a support leg, and the bottom end of the support leg is equipped with a forward wheel. This design enables the device to move forward and backward flexibly on the highway without occupying too much lane space. The mowing work can be completed without setting up roadblocks. The integration of the hub motor enables the forward wheel to have a self-propelled function, which means that the mowing device can move autonomously without the need for additional traction or propulsion. This self-propelled function greatly improves the efficiency of the mowing operation and reduces It reduces the intensity of manual labor and makes the pruning operation more flexible and faster. In addition, a number of suspension rods are vertically fixed at the bottom of the crossbeam. These suspension rods are lifted and matched with rubber wheels near the bottom. The rubber wheels roll and match the side of the guardrail to limit the travel route of the pruning device, ensuring that the pruning device can move stably along the predetermined path of the guardrail, reducing interference with traffic. In addition, the rubber wheels can be raised and lowered to facilitate obstacle avoidance. When encountering obstacles on the guardrail, the rubber wheels can be retracted, so that the pruning device can go over the obstacles and continue to work, which improves the continuity and efficiency of the operation, and also ensures the safety of the operation; (2) In the present invention, in the pruning device, the pruning steel cable, as a key part of the pruning component, has a long service life and low cost. Due to the durability of the steel cable, it is not easy to be damaged, which reduces the frequency of maintenance and replacement, thereby reducing long-term operating costs. The length of the pruning steel cable can be flexibly selected according to the width and height of the green belt, which enables the pruning device to adapt to green belts of different sizes. This design improves the versatility and applicability of the pruning device, enabling it to work effectively in a variety of different green belt scenarios. In addition, when the pruning steel cable encounters a hard object, it will not get stuck or damaged like some vulnerable parts, thereby avoiding possible damage to the pruning drive motor. This design improves the safety of the pruning process and reduces the risk of accidents caused by equipment failure. The two pruning components prune the side and top of the highway green belt respectively. This design improves the pruning efficiency, enables the pruning work to be completed quickly, and ensures the uniformity and consistency of the pruning. (3) In the present invention, the crushing component of the pruning device can crush the pruned branches and leaves. This design reduces the waste of branches and leaves and converts them into fertilizer for the green belt, which has good environmental benefits. The design of the discharge nozzle allows the crushed branches and leaves to be discharged smoothly from the crushing box and directionally discharged to the green belt, avoiding the crushed materials from being scattered everywhere and keeping the work site clean. At the same time, the crushed branches and leaves can provide fertility for the green belt, promote plant growth, and realize the recycling of resources. The blower and the blowpipe can be used together to blow the crushed branches and leaves in the crushing box to the discharge nozzle, avoiding the accumulation of crushed branches and leaves in the crushing box and affecting the subsequent crushing efficiency, thereby ensuring the smooth discharge of the crushed branches and leaves. (4) In the present invention, the trimming device provides a stable working platform for the trimming device through the close combination of the clamping wheel and the guardrail in the limit assembly, thereby ensuring the accuracy and stability during the trimming process, avoiding uneven trimming caused by the movement or vibration of the device, and thus improving the trimming quality. In the limit assembly, the square tube and the telescopic tube are used in combination, so that the distance between the two clamping wheels can be adjusted. By adjusting the distance between the two clamping wheels in the limit assembly, the trimming device can adapt to high-speed guardrails of different upper and lower widths and shapes. This adjustable design ensures the versatility and applicability of the trimming device, and can flexibly respond to various situations. The use of the adjustment spring ensures that the clamping wheel reduces rolling resistance while clamping, realizes smooth rolling, balances the pressure of the clamping wheel on the guardrail, reduces the friction between the clamping wheel and the guardrail, thereby reducing the wear on the guardrail and the damage to the clamping wheel, and extending the service life of both. (5) In the present invention, the arrangement of the wind power generation components and the solar panels in the pruning device fully utilizes the wind energy and solar energy in the natural environment, converts them into electrical energy, and provides part or all of the required electricity for the pruning device. This self-powered energy mode reduces the dependence on external power sources, reduces energy costs, and has environmental benefits, thereby achieving energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the forward wheel structure of the present invention.

[0019] Figure 3 for Figure 1 A magnified detail of area A.

[0020] Figure 4 for Figure 1 A magnified view of the detail of area B.

[0021] Figure 5 It is a schematic diagram of the suspension rod structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the lifting block structure of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the limiting component of the present invention.

[0024] Figure 8 It is a cross-sectional view of the limiting component of the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure of the wind power generation component of the present invention.

[0026] Fig.10 It is a schematic diagram of the structure in which the trimming assembly of the present invention is installed on a support column.

[0027] Fig.11 It is a schematic diagram of the structure of the trimming assembly of the present invention.

[0028] Fig.12 It is a schematic diagram of the structure of the baffle plate of the present invention.

[0029] Fig.13 It is a schematic diagram of the structure of the crushing component of the present invention.

[0030] Fig.14 This is a schematic diagram of the assembly structure of the pulverizing motor and the pulverizing cutter head of the present invention.

[0031] In the figure: 1, crossbeam; 2, outrigger; 3, forward wheel; 4, connecting seat; 5, front fork; 6, shock-absorbing spring; 7, hub motor; 8, suspension rod; 9, slide rail; 10, rolling groove; 11, screw rod; 12, lifting drive motor; 13, connecting rod; 14, mounting block; 15, rubber wheel; 16, lifting block; 17, slider; 18, lifting nut; 19, roller; 20, limit assembly; 21, square tube; 22, telescopic tube; 23, clamping wheel; 24, limit rod; 25, adjustment spring; 26, limit nut; 27, support block; 28, wind power generation assembly; 29. Connecting parts; 30. Fan blades; 31. Generator; 32. Support column; 33. Cross bar; 34. Connecting rod; 35. Install long rod; 36. Install short rod; 37. Trimming assembly; 38. Fixing plate; 39. Trimming drive motor; 40. Trimming cable; 41. Fan; 42. Blocking plate; 43. Leaf sliding plate; 44. Solar panel; 45. Crushing assembly; 46. Crushing box; 47. Discharge nozzle; 48. Connecting plate; 49. Crushing motor; 50. Crushing blade; 51. Hair dryer; 52. Blowing pipe; 53. Reflective sheet; 54. Warning light. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figure 1-Figure 14As shown, an automatic pruning device for a highway green belt described in the present invention comprises a crossbeam 1, a limit assembly 20, a pruning assembly 37 and a crushing assembly 45. A support leg 2 is vertically fixed to the bottom end of the crossbeam 1, and a forward wheel 3 is installed at the bottom end of the support leg 2. A plurality of suspension rods 8 are vertically fixed to the bottom of the crossbeam 1. A rubber wheel 15 is provided near the bottom of the plurality of suspension rods 8. The rubber wheel 15 is rollingly fitted on the side of the guardrail, which limits the travel route of the pruning device and ensures that the pruning device can stably move along the predetermined path of the guardrail, thereby improving the accuracy and controllability of the operation. The use of the rubber wheel 15 will not cause wear to the guardrail. When the rubber wheel contacts the guardrail, it can reduce friction and wear, protect the integrity of the guardrail, and extend the life of the guardrail. The service life of the pruning device is long. The rubber wheel 15 can be raised and lowered to facilitate obstacle avoidance. When encountering an obstacle on the guardrail, such as a guardrail pillar, the rubber wheel 15 can be lowered and retracted, so that the pruning device can go over the obstacle and continue to operate, thereby improving the continuity and efficiency of the operation. In addition, the setting of the rubber wheel 15 rolls on the side of the guardrail and cooperates with the device as a whole to clamp the guardrail in the middle, so that the pruning device will not detach from the guardrail. This design provides additional stability to ensure that the pruning device will not deviate from the track due to external force or uneven road surface during operation, thereby ensuring the safety and reliability of the operation. Several limit assemblies 20 are vertically installed at the bottom of the beam 1, and the crushing assembly 45 is fixed on one side of the beam 1. The crushing assembly 45 is fixed on one side of the beam 1. The design is used to crush the pruned branches and leaves. The pruned branches and leaves can be processed directly on site, reducing the subsequent cleaning and processing work. A support column 32 is vertically fixed on the top of the crossbeam 1. Two pruning components 37 are respectively installed at the middle height of the support column 32 and the top height of the support column 32. Among them, the pruning component 37 located at the middle height of the support column 32 is horizontally arranged and located directly above the crushing component 45, and the pruning component 37 located at the top height of the support column 32 is vertically downwardly arranged and located directly above the end of the crushing component 45 away from the crossbeam 1. The two pruning components 37 are respectively installed at the middle and top of the support column 32, one is horizontally arranged and the other is vertically downwardly arranged, so that the height can be respectively The side and top of the green belt of the expressway are trimmed. This design enables the trimming device to process multiple surfaces of the green belt at one time, thereby improving the trimming efficiency and coverage. By changing the installation positions of the two trimming components 37, the trimming device can adapt to green belts of different widths and heights. This flexibility enables the device to be applied to a variety of different green belt scenes, thereby enhancing its versatility and applicability. The trimming device has a simple structure and a sophisticated design, and can operate without occupying too much space, thereby reducing interference with highway traffic. In addition, large equipment has a relatively high maintenance cost due to its complexity and the complexity of operation, while the automatic trimming device has a relatively simple structure and is easy to maintain, thereby reducing long-term maintenance costs. The limiting assembly 20 includes a square tube 21, a telescopic tube 22 and two clamping wheels 23. The square tube 21 is vertically fixed at the bottom of the crossbeam 1. The telescopic tube 22 is telescopically fitted in the square tube 21 from the bottom opening of the square tube 21. The two clamping wheels 23 are respectively mounted on the square tube 21 and the telescopic tube 22, and the two clamping wheels 23 are aligned up and down. The limiting assembly 20 is closely combined with the clamping wheels 23 and the guardrail to provide a stable working platform for the trimming device, ensure the accuracy and stability of the trimming process, avoid uneven trimming caused by movement or vibration of the device, and thus improve the trimming quality. In the limiting assembly 20, the coordinated use of the square tube 21 and the telescopic tube 22 makes The distance between the two clamping wheels 23 can be adjusted. By adjusting the distance between the two clamping wheels 23 in the limit assembly 20, the trimming device can adapt to highway guardrails of different upper and lower widths and shapes. Since the design and width of highway guardrails may vary from region to region or section to section, this adjustable design ensures the versatility and applicability of the trimming device and can flexibly respond to various situations. In addition, by adjusting the position of the two clamping wheels 23, the trimming device can fit closely to the guardrail, further improving the stability and safety during the trimming process, thereby reducing uneven trimming caused by movement or vibration of the device, and also reducing the risk of accidents during operation.

[0034] In an optional implementation manner of the present embodiment, the forward wheel 3 includes a connecting seat 4, a front fork 5 and a hub motor 7. The hub motor 7 is an electric drive system integrated in the vehicle wheel hub. Its greatest feature is that the power, transmission and braking devices are integrated into the wheel hub, thereby greatly simplifying the mechanical part of the electric vehicle. The connecting seat 4 is fixed to the bottom end of the support leg 2, and the front fork 5 has an inverted "U"-shaped structure. The front fork 5 rotatably fits at the bottom of the connecting seat 4. It is necessary to ensure that the rotating fitting part of the front fork 5 is tightly fitted with the bottom of the connecting seat 4 to ensure stable rotation of the wheel. The hub motor 7 is installed between the front fork 5. A shock-absorbing spring 6 is sleeved on the front fork 5. The shock-absorbing spring 6 is installed on the front fork 5 and is located on both sides of the front fork 5. One end of the shock-absorbing spring 6 is connected to the bottom tube of the front fork 5, and the other end is connected to the upper shoulder cover of the front fork 5. The shock-absorbing spring 6 can It can effectively absorb the impact caused by uneven road surface, reduce the vibration of the pruning device, improve the driving stability of the pruning device, reduce the pruning deviation caused by vibration, and ensure the consistency and accuracy of the pruning work. Due to the presence of the shock-absorbing spring 6, the pruning device can better adapt to complex and changeable terrain conditions, such as slopes, potholes, etc., and maintain stable operating performance. The integration of the hub motor 7 enables the forward wheel 3 to have a self-propelled function, which means that the pruning device can move autonomously without additional traction or driving force. This self-propelled function greatly improves the efficiency of the pruning operation, reduces the intensity of manual labor, and makes the pruning operation more flexible and fast. The self-propelled function provided by the hub motor 7, combined with the shock-absorbing effect of the shock-absorbing spring 6, enables the pruning device to move quickly and stably on various terrains, greatly improving the efficiency of the pruning work.

[0035] In an optional implementation of the present embodiment, the cross-sections of the two clamping wheels 23 in the limiting assembly 20 are both "H"-shaped structures. The clamping wheels 23 with the "H"-shaped structures can be firmly clamped on the edge of the guardrail. This design prevents the clamping wheels 23 from deviating or falling off when rolling. This stability is essential for ensuring that the trimming device moves along the correct path of the guardrail, which improves the accuracy and controllability of the operation. The limiting assembly 20 also includes a limiting rod 24, which is vertically fixed in the square tube 21. The limiting rod 24 is extended from The top of the contraction tube 22 runs through the entire telescopic tube 22, and the telescopic tube 22 is slidably matched with the limit rod 24. The limit rod 24 is provided with a thread near the bottom. The threaded bottom end of the limit rod 24 is threaded with a limit nut 26. An adjustment spring 25 is sleeved on the limit rod 24 between the limit nut 26 and the bottom end of the telescopic tube 22. The sliding match between the limit rod 24 and the telescopic tube 22, as well as the match between the thread and the limit nut 26, enable the limit assembly 20 to be fine-tuned to adapt to different guardrail shapes. The adjustment spring 25 is sleeved on the limit rod 24, located between the limit nut 26 and the bottom end of the telescopic tube 22, and plays a shock-absorbing role, which helps to absorb vibrations during operation, reduce the impact on the device itself, and improve the durability of the device. In addition, the adjustment spring 25 provides the necessary elastic force so that the clamping wheel 23 can be close to the guardrail to ensure that the pruning device will not be displaced or fall off during operation. This tight clamping effect is crucial to maintaining the stability and safety of the pruning device. Although the clamping wheel 23 needs to tightly clamp the guardrail to maintain stability, it also needs to be able to roll smoothly on the guardrail for pruning operations. The use of the adjustment spring 25 ensures that the clamping wheel 23 reduces rolling resistance while clamping, achieves smooth rolling, balances the pressure of the clamping wheel 23 on the guardrail, reduces the friction between the clamping wheel 23 and the guardrail, thereby reducing the wear on the guardrail and the damage to the clamping wheel 23, and extending the service life of both. The smooth rolling of the clamping wheel 23 reduces the stagnation and adjustment time of the pruning device during operation, and improves the continuity and efficiency of the operation.

[0036] In an optional implementation manner of the present embodiment, the bottom end of the boom 8 close to the crushing assembly 45 is hinged with two sets of parallel connecting rods 13, and the ends of the two sets of connecting rods 13 away from the boom 8 are hinged with a mounting block 14. The internal space composed of the boom 8, the two sets of connecting rods 13 and the mounting block 14 is a parallelogram structure, and the rubber wheel 15 is horizontally rotated and matched with the top of the mounting block 14. A lifting block 16 is lifted and lowered on one side of the boom 8, and a steel wire rope is connected between the lifting block 16 and the mounting block 14. A slide rail 9 is vertically welded to one end of the boom 8, and a rolling groove 10 is opened on one side of the boom 8. The side of the boom 8 away from the rolling groove 10 is vertically rotated and matched with a screw rod 11, and the boom 8 is far away from the rolling groove 10. A lifting drive motor 12 for driving the screw rod 11 to rotate is vertically installed on the upper part of the side away from the rolling groove 10. The cross section of the lifting block 16 is an "L"-shaped structure. A slider 17 is fixed on the side of the lifting block 16 close to the slide rail 9. The slider 17 slides and fits on the slide rail 9. The side of the lifting block 16 close to the rolling groove 10 is rotatably matched with a roller 19. The roller 19 rolls and fits in the rolling groove 10. A lifting nut 18 is horizontally fixed on the lifting block 16. The lifting nut 18 is threadedly matched on the screw rod 11. The lifting drive motor 12 drives the screw rod 11 to rotate, so that the lifting nut 18 moves, and the lifting nut 18 drives the lifting block 16 to move, so that the lifting block 16 is lifted and lowered. The installation block 14 is pulled by the steel wire rope 16 to move, and the movement of the installation block 14 realizes the lifting and lowering adjustment of the rubber wheel 15. The internal space composed of the suspension rod 8, the two sets of connecting rods 13 and the installation block 14 is a parallelogram structure. This structure allows the rubber wheel 15 to be kept in a horizontal position during the lifting process, ensuring that the contact between the trimming device and the guardrail is always consistent, thereby improving the stability of the operation and the trimming quality. Due to the use of the two sets of connecting rods 13, the lifting route of the installation block 14 is an arc structure. In this way, when the lifting block 16 moves upward, the installation block 14 can extend to the back side of the guardrail through the rotation of the two sets of connecting rods 13, so that the rubber wheel 15 is close to the back side of the guardrail. When the lifting block 16 moves upward, the installation block 14 can extend to the back side of the guardrail through the rotation of the two sets of connecting rods 13, so that the rubber wheel 15 is close to the back side of the guardrail. When moving downward, the mounting block 14 can be retracted from the back side of the guardrail to the device body through the rotation of the two sets of connecting rods 13, so that the rubber wheel 15 is transferred from the back side of the guardrail to the position between the guardrail and the device. The arc-shaped lifting route of the mounting block 14 can realize the sending and retraction of the rubber wheel 15, thereby realizing the avoidance of the guardrail pillar and realizing the avoidance function. The slider 17 is slidably matched on the slide rail 9. This matching mode enables the lifting block 16 to move up and down along the slide rail 9 smoothly, reduces friction and wear, and improves the life and efficiency of the lifting system. The roller 19 is rollingly matched in the rolling groove 10. This matching mode also reduces friction, making the lifting and lowering of the lifting block 16 smoother.

[0037] In an optional implementation of the present embodiment, a plurality of support blocks 27 are horizontally arranged directly below the crossbeam 1, one end of the support block 27 is fixed to the square tube 21, and the other end of the support block 27 is fixed to the boom 8 or the leg 2, and a wind power generation assembly 28 is installed on the top of the plurality of support blocks 27, and the wind power generation assembly 28 includes a connecting member 29, a fan blade 30 and a generator 31, the connecting member 29 is fixed to the top of the support block 27, the fan blade 30 is rotatably fitted on the top of the connecting member 29, the generator 31 is installed in the connecting member 29, and a transmission shaft is connected between the generator 31 and the fan blade 30. The wind power generation component 28 includes a connector 29, fan blades 30 and a generator 31, which can convert wind energy into electrical energy to provide part or all of the required electricity for the pruning device. This self-powered energy mode reduces dependence on external power sources and improves the independence and flexibility of the pruning device. By utilizing wind power generation, the pruning device can achieve energy conservation and emission reduction, reduce the consumption of fossil energy, and reduce environmental pollution. The setting of the wind power generation component 28 makes full use of the wind energy in the natural environment and the airflow brought by high-speed vehicles, converts them into electrical energy, and improves the energy utilization efficiency.

[0038] In an optional implementation of the present embodiment, a cross bar 33 is horizontally fixed near the top of one side of the support column 32, and a solar panel 44 is horizontally fixed on the top of the cross bar 33. The provision of the solar panel 44 allows the pruning device to utilize solar energy to generate electricity and provide energy for the fan 41 and other electric components. The use of such renewable energy reduces dependence on external power supplies, reduces energy costs, and has environmental benefits. A connecting rod 34 is vertically fixed below the middle of the cross bar 33, and a mounting long rod 35 is horizontally fixed at the bottom of the connecting rod 34. A pruning component 37 is vertically installed in the middle of the mounting long rod 35. Fans 41 are installed at both ends of the mounting long rod 35. The fan 41 is designed to blow the pruned branches and leaves toward the crushing component 45, which can speed up the collection and processing of branches and leaves and improve the efficiency of pruning and crushing. A mounting short rod 36 is horizontally fixed in the middle of one side of the support column 32, and a pruning component 37 is horizontally installed at one end of the mounting short rod 36 away from the support column 32.

[0039] In an optional implementation of the present embodiment, the two trimming components 37 each include a fixing plate 38, a trimming drive motor 39 and a trimming cable 40. The two fixing plates 38 are respectively mounted at the middle of the long rod 35 and at the end of the short rod 36. One trimming drive motor 39 is vertically fixed to the fixing plate 38 at the middle of the long rod 35, and the other trimming drive motor 39 is horizontally fixed to the fixing plate 38 at the end of the short rod 36. The two trimming cables 40 are respectively connected to the output ends of the two trimming drive motors 39 through rotating shafts. The trimming cable 40, as a key part of the trimming component 37, has a long service life and low cost. Due to the durability of the cable, it is not easy to be damaged, which reduces the frequency of maintenance and replacement, thereby reducing long-term operation costs. Cost, the length of the trimming cable 40 can be flexibly selected according to the width and height of the green belt, which enables the trimming device to adapt to green belts of different sizes. This design improves the versatility and applicability of the trimming device, enabling it to work effectively in a variety of different green belt scenarios. In addition, when the trimming cable 40 encounters a hard object, it will not get stuck or damaged like some vulnerable parts, thereby avoiding possible damage to the trimming drive motor 39. This design improves the safety of the trimming process and reduces the risk of accidents caused by equipment failure. The two trimming components 37 trim the side and top of the highway green belt respectively. This design improves the trimming efficiency, enables the trimming work to be completed quickly, and ensures the uniformity and consistency of the trimming.

[0040] In an optional implementation manner of the present embodiment, the crushing assembly 45 includes a crushing box 46, a crushing motor 49 and a blower 51. The crushing box 46 is fixed on one side of the beam 1. The top of the crushing box 46 is provided with an opening for receiving fallen leaves. The bottom of the crushing box 46 is provided with a discharge nozzle 47 on the side away from the beam 1. The design of the discharge nozzle 47 allows the crushed branches and leaves to be smoothly discharged from the crushing box 46. Since the discharge nozzle 47 is inclined, it can not only discharge the crushed materials and avoid clogging inside the crushing box 46, thereby ensuring the continuity and efficiency of the crushing process, but also can directionally discharge the crushed branches and leaves to the green belt, thereby avoiding the crushed materials from being scattered everywhere and keeping the work site clean. At the same time, the crushed branches and leaves can be used as organic fertilizer to provide nutrients for plants in the green belt. This natural fertilizer helps plant growth and reduces the use of chemical fertilizers. It is an environmentally friendly nutrient management method. This design reduces the generation and transportation of pruning waste, reduces carbon emissions, and is an environmentally friendly Environmentally friendly operation mode, the bottom of the short rod 36 is fixed with a connecting plate 48, the crushing motor 49 is vertically fixed on the connecting plate 48, the bottom of the crushing motor 49 is connected with a crushing blade 50 through a rotating shaft, the crushing blade 50 is rotatably matched in the crushing box 46, the crushing assembly 45 realizes the rapid crushing of the pruned branches and leaves through the cooperation of the crushing box 46, the crushing motor 49 and the crushing blade 50, and the crushing motor 49 drives the crushing blade 50 to rotate at a high speed in the crushing box 46 , the branches and leaves are broken down into smaller fragments. The hair dryer 51 is horizontally fixed on one side of the cross beam 1 close to the crushing box 46. A blow pipe 52 is connected to the air outlet of the hair dryer 51. One end of the blow pipe 52 is inserted into the crushing box 46. The hair dryer 51 and the blow pipe 52 are used in coordination to blow the crushed branches and leaves in the crushing box 46 toward the discharge nozzle 47. This coordination not only avoids the accumulation of crushed branches and leaves in the crushing box 46, affecting the subsequent crushing efficiency, but also ensures the smooth discharge of the crushed branches and leaves.

[0041] In an optional implementation manner of the present embodiment, a baffle plate 42 is fixed on the cross beam 1 and the support column 32, and a leaf falling slide 43 is obliquely arranged at the lower part of the baffle plate 42 near one end of the cross beam 1, and the bottom end of the leaf falling slide 43 is aligned with the top opening of the crushing box 46. The baffle plate 42 is used to prevent the pruned branches and leaves from flying around, which can reduce pollution to the surrounding environment and keep the working area clean and tidy, while also avoiding the impact of branches and leaves on passing vehicles, thereby improving road driving safety. The baffle plate 42 can also prevent branches and leaves from accumulating on the pruning device, thereby avoiding affecting the normal operation of the device due to the accumulation of branches and leaves. The design of the baffle plate 42 and the leaf-falling slide 43 can prevent branches and leaves from falling onto the highway surface, keep the road surface clean, and reduce the risk of road slippage caused by branches and leaves. The design of the leaf-falling slide 43 ensures that most of the pruned branches and leaves can smoothly enter the crushing box 46 for crushing, and finally return to the green belt as organic fertilizer, providing nutrients for plants, promoting plant growth, and realizing the recycling of resources. The design of the leaf-falling slide 43 ensures that most of the pruned branches and leaves can smoothly enter the crushing box 46 for crushing, thereby increasing the decomposition speed of the pruned branches and leaves in the green belt.

[0042] In an optional implementation of the present embodiment, a reflective sheet 53 is fixed to the outer side of the baffle plate 42, and warning lights 54 are installed at both ends of the top of the beam 1. The arrangement of the reflective sheet 53 and the warning light 54 significantly improves the visibility of the trimming device during operation. The reflective sheet 53 can reflect the lights of surrounding vehicles, and the warning light 54 flashes to emit obvious light signals to remind passing vehicles and personnel to pay attention to the trimming operation area, thereby reducing the risk of traffic accidents and accidents. The design of the reflective sheet 53 and the warning light 54 enables the trimming device to adapt to different working environments, whether it is day or night, or under different weather conditions, to ensure the safety and efficiency of the operation.

[0043] When in use, first, the wind power generation component 28 of the device uses natural wind power and the airflow brought by high-speed vehicles to generate electricity, and the solar panel 44 uses solar energy to generate electricity. The electricity generated by the wind power generation component 28 and the solar panel 44 is used to operate the electrical components of the device. The pruning device moves to the side of the green belt that needs to be pruned, and the warning light 54 is turned on. The limit assembly 20 including the square tube 21, the telescopic tube 22 and the clamping wheel 23 is adjusted into place. The two clamping wheels 23 in the limit assembly 20 are clamped from the upper and lower ends of the guardrail respectively and are tightly combined with the guardrail. At the same time, the lifting drive 12 drives the screw rod 11 to rotate, so that the lifting nut 18 moves, and then drives the lifting block 16 to move. The steel wire rope of the lifting block 16 pulls the mounting block 14, so that the mounting block 14 moves in the direction of rotation of the connecting rod 13, and moves the mounting block 14 upward The rubber wheel 15 is moved so that it is close to the back side of the guardrail, thereby ensuring that the trimming device moves along the correct path of the guardrail. The trimming device is started, and the hub motor 7 starts working to drive the trimming device to move along the highway. The self-propelled function of the hub motor 7 enables the device to move autonomously without additional traction or driving force. During the movement of the device, when encountering a guardrail post, the lifting block 16 is moved downward. The mounting block 14 relies on gravity to move downward after lacking traction, and moves in the direction of rotation of the connecting rod 13, and the rubber wheel 15 is retracted to the device body, that is, the side of the guardrail close to the device. After the device passes the guardrail post, the rubber wheel 15 is sent back to the back side of the guardrail. Then, during the movement of the device, the horizontal trimming component 37 located at the middle height of the support column 32 starts working to horizontally trim the side of the green belt. The pruning cable 40 rotates rapidly under the drive of the pruning drive motor 39 to prune the branches and leaves on the side of the green belt. The vertical pruning assembly 37 located at the height of the top of the support column 32 starts to work and prunes the top of the green belt vertically. The pruned branches and leaves are guided by the blocking plate 42 and the leaf-falling slide 43 and fall into the opening for receiving fallen leaves of the crushing assembly 45. The design of the leaf-falling slide 43 ensures that the branches and leaves enter the crushing box 46 smoothly. Finally, the crushing motor 49 drives the crushing blade 50 to rotate at high speed in the crushing box 46 to break the branches and leaves into smaller fragments. The crushed branches and leaves are discharged through the discharge nozzle 47. The inclined setting of the discharge nozzle 47 allows the branches and leaves to be discharged to the green belt in a direction, avoiding the scattering of the crushed materials, and keeping the work site clean. The blower 51 and the blow pipe 52 are used in combination to blow the crushed branches and leaves in the crushing box 46 to the discharge nozzle 47, ensuring the smooth discharge of the crushed branches and leaves and avoiding accumulation in the crushing box 46.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic pruning device for a highway green belt, comprising a crossbeam (1), a limit assembly (20), a pruning assembly (37) and a crushing assembly (45), characterized in that: A support leg (2) is vertically fixed to the bottom end of the crossbeam (1), and a forward wheel (3) is installed at the bottom end of the support leg (2). A plurality of suspension rods (8) are vertically fixed to the bottom of the crossbeam (1), and a plurality of rubber wheels (15) are provided on one side of the suspension rods (8) near the bottom for lifting and lowering. A plurality of limit assemblies (20) are vertically installed at the bottom of the crossbeam (1). The crushing assembly (45) is fixed to one side of the crossbeam (1). A support column (32) is vertically fixed to the top of the crossbeam (1), and two trimming assemblies (37) are respectively installed at the middle height of the support column (32) and at the top height of the support column (32), wherein the trimming assembly (37) located at the middle height of the support column (32) is horizontally arranged and located directly above the crushing assembly (45), and the trimming assembly (37) located at the top height of the support column (32) is vertically arranged downward and located directly above the end of the crushing assembly (45) away from the crossbeam (1); The position limiting assembly (20) comprises a square tube (21), a telescopic tube (22) and two clamping wheels (23); the square tube (21) is vertically fixed to the bottom of the crossbeam (1); the telescopic tube (22) is telescopically fitted into the square tube (21) from an opening at the bottom of the square tube (21); the two clamping wheels (23) are respectively mounted on the square tube (21) and the telescopic tube (22), and the two clamping wheels (23) are aligned up and down.

2. The automatic pruning device for highway green belts according to claim 1, characterized in that: The forward wheel (3) comprises a connecting seat (4), a front fork member (5) and a wheel hub motor (7); the connecting seat (4) is fixed to the bottom end of the support leg (2); the front fork member (5) is an inverted "U"-shaped structure; the front fork member (5) is rotatably engaged with the bottom of the connecting seat (4); the wheel hub motor (7) is installed between the front fork members (5); and a shock absorbing spring (6) is sleeved on the front fork member (5).

3. The automatic pruning device for highway green belts according to claim 1 is characterized in that: The cross-sections of the two clamping wheels (23) in the limit assembly (20) are both in an "H"-shaped structure. The limit assembly (20) further comprises a limit rod (24). The limit rod (24) is vertically fixed in the square tube (21). The limit rod (24) passes through the entire telescopic tube (22) from the top of the telescopic tube (22). The telescopic tube (22) and the limit rod (24) are slidably matched. The limit rod (24) is provided with a thread near the bottom. The threaded bottom end of the limit rod (24) is threadedly matched with a limit nut (26). An adjustment spring (25) is sleeved on the limit rod (24) and located between the limit nut (26) and the bottom end of the telescopic tube (22).

4. The automatic pruning device for highway green belts according to claim 1 is characterized in that: The bottom end of the suspension rod (8) close to the crushing assembly (45) is hingedly matched with two sets of parallel connecting rods (13), and the ends of the two sets of connecting rods (13) away from the suspension rod (8) are hingedly matched with a mounting block (14). The internal space formed by the suspension rod (8), the two sets of connecting rods (13) and the mounting block (14) is a parallelogram structure. The rubber wheel (15) is horizontally rotated and matched with the top of the mounting block (14). A lifting block (16) is lifted and matched on one side of the suspension rod (8). A steel wire rope is connected between the lifting block (16) and the mounting block (14). A slide rail (9) is vertically welded to one end of the suspension rod (8). A rolling groove (10) is opened on one side of the suspension rod (8). The suspension rod (8) is away from the rolling groove. A lead screw (11) is vertically rotatably engaged on one side of the groove (10); a lifting drive motor (12) for driving the lead screw (11) to rotate is vertically installed on the upper part of the suspension rod (8) away from the rolling groove (10); the lifting block (16) has an "L"-shaped cross-section; a slider (17) is fixed on the side of the lifting block (16) close to the slide rail (9); the slider (17) is slidably engaged on the slide rail (9); a roller (19) is rotatably engaged on the side of the lifting block (16) close to the rolling groove (10); the roller (19) is rollingly engaged in the rolling groove (10); a lifting nut (18) is horizontally fixed on the lifting block (16); the lifting nut (18) is threadedly engaged on the lead screw (11).

5. The automatic pruning device for highway green belts according to claim 4 is characterized in that: A plurality of support blocks (27) are horizontally arranged directly below the crossbeam (1); one end of the support block (27) is fixed to the square tube (21); the other end of the support block (27) is fixed to the suspension rod (8) or the support leg (2); a wind power generation assembly (28) is installed on the top of each of the plurality of support blocks (27); the wind power generation assembly (28) comprises a connecting piece (29), a fan blade (30) and a generator (31); the connecting piece (29) is fixed to the top of the support block (27); the fan blade (30) is rotatably engaged with the top of the connecting piece (29); the generator (31) is installed in the connecting piece (29); and a transmission shaft is connected between the generator (31) and the fan blade (30).

6. The automatic pruning device for highway green belts according to claim 1, characterized in that: A cross bar (33) is horizontally fixed near the top of one side of the support column (32), a solar panel (44) is horizontally fixed on the top of the cross bar (33), a connecting rod (34) is vertically fixed below the middle of the cross bar (33), a mounting long rod (35) is horizontally fixed at the bottom of the connecting rod (34), a trimming assembly (37) is vertically installed in the middle of the mounting long rod (35), fans (41) are installed at both ends of the mounting long rod (35), a mounting short rod (36) is horizontally fixed in the middle of one side of the support column (32), and a trimming assembly (37) is horizontally installed at one end of the mounting short rod (36) away from the support column (32).

7. The automatic pruning device for highway green belts according to claim 6, characterized in that: The two trimming assemblies (37) each comprise a fixing plate (38), a trimming drive motor (39) and a trimming steel cable (40). The two fixing plates (38) are respectively mounted at the middle of the long mounting rod (35) and at the end of the short mounting rod (36). One trimming drive motor (39) is vertically fixed to the fixing plate (38) at the middle of the long mounting rod (35), and the other trimming drive motor (39) is horizontally fixed to the fixing plate (38) at the end of the short mounting rod (36). The two trimming steel cables (40) are respectively connected to the output ends of the two trimming drive motors (39) via rotating shafts.

8. The automatic pruning device for highway green belts according to claim 6, characterized in that: The pulverizing assembly (45) comprises a pulverizing box (46), a pulverizing motor (49) and a blower (51). The pulverizing box (46) is fixed to one side of the cross beam (1). An opening for receiving fallen leaves is provided at the top of the pulverizing box (46). A discharge nozzle (47) is obliquely provided at the side of the bottom of the pulverizing box (46) away from the cross beam (1). A connecting plate (48) is fixed to the bottom of the mounting short rod (36). The pulverizing motor (49) is vertically fixed to the connecting plate (48). A pulverizing blade head (50) is connected to the bottom end of the pulverizing motor (49) via a rotating shaft. The pulverizing blade head (50) is rotatably engaged in the pulverizing box (46). The blower (51) is horizontally fixed to one side of the cross beam (1) close to the pulverizing box (46). A blow pipe (52) is connected to the air outlet of the blower (51). One end of the blow pipe (52) is inserted into the pulverizing box (46).

9. The automatic pruning device for highway green belts according to claim 8, characterized in that: A baffle plate (42) is fixed on the cross beam (1) and the support column (32), and a leaf-falling slide plate (43) is obliquely provided at the lower portion of the baffle plate (42) close to one end of the cross beam (1), and the bottom end of the leaf-falling slide plate (43) is aligned with the top opening of the crushing box (46).

10. The automatic pruning device for highway green belts according to claim 9, characterized in that: A reflective sheet (53) is fixed to the outer side of the baffle plate (42), and warning lights (54) are installed at both ends of the top of the crossbeam (1).

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