A median strip trimmer for road maintenance

Abstract

The invention discloses a center dividing strip trimmer for road maintenance, comprising a vehicle-mounted chassis, a crank arm, a power frame and a pruning head; the crank arm is of a multi-section bendable design, a sliding seat capable of sliding relative to the vehicle-mounted chassis is arranged at the bottom, an end mounting frame for mounting the power frame is arranged at the top, a driving part for driving the mounting power frame to rotate along a horizontal axis is arranged inside the end mounting frame; the vehicle-mounted chassis can be fixed to an external vehicle, and comprises a power mechanism and a guide mechanism for driving and guiding the sliding seat to slide; the power frame is installed, and a plurality of groups of output shafts arranged in parallel are arranged inside, and all the output shafts are connected to the power main shaft through a bevel gear pair, and the power main shaft is connected to the power main shaft with a driving part for driving; the center dividing strip trimmer for road maintenance adopts a replaceable cutter head design, which can adapt to the pruning needs of different scenarios and effectively reduce the probability of the cutter head being chipped or broken.

Description

Technical Field

[0001] The invention relates to the technical field of road greening equipment, in particular to a center strip trimmer for road maintenance. Background Art

[0002] When constructing major highways such as expressways or national roads, in order to reduce the mutual impact of sound and light between opposite lanes, a green belt, also known as a median strip, is generally set up in the middle of the road. In actual use, the median strip should be trimmed regularly to ensure its beauty and neatness, and to prevent its outstretched branches from affecting passing vehicles.

[0003] In actual operation, there are two ways to prune the center strip. One is manual pruning, which is to manually carry pruning tools and perform pruning on the road. It is inefficient, labor-intensive, and extremely dangerous to personnel. The other is to use existing vehicle-mounted equipment for pruning. The existing pruning equipment has a fixed blade head, most of which are high-speed rotating blades. It is OK to prune the tender buds on the top of the center strip, but when pruning the old branches on the side of the center strip, the rotating blade is easily broken due to the thick old branches. Some pruning equipment uses saw blades. During the pruning process, the external load vehicle has a constant speed, which is very likely to cause the saw blade to break for thicker branches.

[0004] Therefore, a vehicle-mounted pruning device should be developed that can quickly replace the cutter head for adaptive pruning and can adaptively adjust the pruning of branches with different diameters. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a center dividing strip trimmer for road maintenance, which adopts a replaceable cutter head design to adapt to the trimming needs of different scenarios and effectively reduce the probability of cutter head chipping or breaking, thereby effectively solving the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a median strip trimmer for road maintenance, comprising a vehicle-mounted chassis, a crank arm, a power frame and a trimming head;

[0007] The crank arm is of multi-section bendable design, with a sliding seat at the bottom that can slide relative to the vehicle-mounted chassis, and an end mounting frame for mounting a power frame at the top, wherein a driving part for driving the mounting power frame to rotate along a horizontal axis is arranged inside the end mounting frame;

[0008] The vehicle-mounted chassis can be fixed to an external vehicle and includes a power mechanism and a guide mechanism for driving and guiding the sliding seat to slide;

[0009] A power frame is installed, in which a plurality of sets of output shafts arranged in parallel are arranged, and all the output shafts are connected to the power main shaft through a bevel gear pair, and the power main shaft is connected to a driving part for driving;

[0010] The pruning head comprises a cutter disc frame fixedly connected to a mounting power frame, wherein a plurality of blades or chain saws are rotatably mounted in the cutter disc frame, and a power quick-release structure is arranged between the input shaft of the blade and the input shaft of the chain saw and the output shaft.

[0011] As a preferred technical solution of the present invention, the cutter disc frame is provided with a driven sprocket group located at the front end and a driving sprocket group located at the rear end, a power quick-release structure is provided between the sprocket in the driving sprocket group and the output shaft, a sprocket mounting seat is provided for relative rotation of the sprocket in the driven sprocket group, the sprocket mounting seat and the cutter disc frame are installed for relative sliding, and an elastic member is provided between the two along the direction of relative movement, when the chain saw blade of the chain saw receives a force in the tangential direction, the chain saw blade can drive the sprocket mounting seat to slide backward to avoid.

[0012] As a preferred technical solution of the present invention, the sprocket of the driving sprocket group is rotatably mounted on the cutter disc frame, and a polygonal prism is arranged at the end of the sprocket, and a polygonal groove matching the polygonal prism is arranged at the end of the output shaft, and when the cutter disc frame is fixedly connected to the power frame by bolts, the polygonal prism is inserted into the polygonal groove.

[0013] As a preferred technical solution of the present invention, the axial spacing of the blades in the cutter disc frame is larger than the blade's own rotation diameter, and a polygonal prism is arranged at the end of the input shaft of the blade, and a polygonal groove matching the polygonal prism is arranged at the end of the output shaft, and when the cutter disc frame is fixedly connected to the power frame by bolts, the polygonal prism is inserted into the polygonal groove.

[0014] As a preferred technical solution of the present invention, an electronic gyroscope for detecting its own pitch angle is arranged inside the cutter head mounting frame.

[0015] As a preferred technical solution of the present invention, the crank arm includes crank arm rods of no less than three sections, and a telescopic rod for controlling the relative angle is provided between two adjacent groups of crank arm rods.

[0016] As a preferred technical solution of the present invention, the end mounting frame and the top end of the crank arm are rotatably mounted along a vertical axis, and a driving portion for driving the rotation is arranged between the two.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the center dividing strip trimmer for road maintenance adopts a replaceable blade head. When trimming the top of the center dividing strip, the branches are relatively thin, and a high-speed rotating blade is used for trimming. During the trimming process, the thin branches will not be pushed, thereby avoiding the problem of incomplete trimming caused by their bending; when trimming the side branches, since the branches are relatively thick, a chain saw is replaced for trimming, and the chain saw is adaptively designed, that is, when the chain saw blade is subjected to greater resistance, the driven sprocket for support behind it can retreat to avoid, thereby ensuring that the tension force inside the chain saw blade is within a safe range, appropriately extending the action time between the chain saw blade and the branches, and when the driven sprocket retreats, the chain saw blade can form a certain arc to wrap the branches and increase the actual contact working area, that is, the branches are operated from different directions at the same time, accelerating the link of the branches being sawed off, thereby adapting to the need for the external vehicle to move forward at a uniform speed, and at the same time solving the problem that the time required for sawing off the thick branches is long, the vehicle cannot move forward at a uniform speed, and the chain saw blade is easy to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the power frame assembly of the present invention;

[0020] Figure 3 It is a schematic diagram of the power frame and the pruning head of the present invention;

[0021] Figure 4 This is a schematic diagram of the bottom of the cutter head mounting frame of the present invention;

[0022] Figure 5 This is a schematic diagram of the installation of the blade of the present invention;

[0023] Figure 6 This is a schematic diagram of the installation of the chain saw of the present invention;

[0024] Figure 7 This is a schematic diagram of the chain saw blade of the present invention working when avoiding;

[0025] Figure 8-Figure 10 It is a schematic diagram of different working states of the present invention.

[0026] In the figure: 1, vehicle-mounted chassis; 2, curved arm; 201, end mounting frame; 202, first motor; 203, second motor; 3, power frame; 301, connecting frame; 302, third motor; 303, cutter disc mounting frame; 304, power spindle; 305, output shaft; 4, trimming head; 401, first cutter disc frame; 402, sprocket mounting seat; 403, elastic member; 404, chain saw blade; 405, second cutter disc frame; 406, blade. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7 , the present invention provides a technical solution: a median strip trimmer for road maintenance, comprising a vehicle-mounted chassis 1, a crank arm 2, a power frame 3 and a trimming head 4;

[0029] The crank arm 2 is of multi-section bendable design, with a sliding seat that can slide relative to the vehicle-mounted chassis 1 at the bottom, and an end mounting frame 201 for mounting the power frame 3 at the top, and a driving part that drives the mounting power frame 3 to rotate along the horizontal axis is arranged inside the end mounting frame 201;

[0030] The attitude of the cutter disc mounting frame 303 is detected by an electronic gyroscope and fed back to the control unit of the first motor 202. The first motor 202 is operated to drive the cutter disc mounting frame 303 to rotate relative to the end mounting frame 201, so that the cutter disc mounting frame 303 is horizontal or vertical, ensuring that the shape of the center strip after trimming is neat.

[0031] The vehicle-mounted chassis 1 can be fixed to an external vehicle and includes a power mechanism and a guide mechanism for driving and guiding the sliding seat to slide;

[0032] The vehicle-mounted chassis 1 is driven by a combination of a lead screw and a motor and guided by a smooth rod or a guide rail, so that the sliding seat can slide along the width direction of the vehicle, thereby facilitating adjustment of the positional relationship between the trimming head 4 and the center dividing belt.

[0033] A power frame 3 is installed, and a plurality of sets of output shafts 305 arranged in parallel are arranged inside, and all the output shafts 305 are connected to the power main shaft 304 through a bevel gear pair, and the power main shaft 304 is connected to a driving part for driving;

[0034] Through the transmission effect of the power main shaft 304, the synchronous output of multiple groups of output shafts 305 is achieved.

[0035] The pruning head 4 includes a cutter head frame for fixed connection with the power mounting frame 3, wherein a plurality of blades 406 or chain saws are rotatably mounted in the cutter head frame, and a power quick-release structure is provided between the input shaft of the blade 406 and the input shaft of the chain saw and the output shaft 305;

[0036] The design of the quick-release structure facilitates the replacement of the pruning head 4 to adapt to different pruning scenarios.

[0037] The cutter disc frame is provided with a driven sprocket group at the front end and a driving sprocket group at the rear end, a power quick-release structure is provided between the sprocket in the driving sprocket group and the output shaft 305, a sprocket mounting seat 402 is provided for the relative rotation of the sprocket in the driven sprocket group, the sprocket mounting seat 402 is installed for relative sliding with the cutter disc frame, and an elastic member 403 is provided between the two along the relative movement direction, when the chain saw blade 404 of the chain saw receives a force in the tangential direction, the chain saw blade 404 can drive the sprocket mounting seat 402 to slide backward to avoid.

[0038] The sprocket of the active sprocket group is rotatably installed with the cutter disc frame, and a polygonal prism is set at the end of the sprocket, and a polygonal groove matching the polygonal prism is set at the end of the output shaft 305. When the cutter disc frame is fixedly connected to the power frame 3 by bolts, the polygonal prism is inserted into the polygonal groove.

[0039] The axial spacing of the blades 406 in the cutter head frame is larger than the blade's own rotation diameter, and a polygonal prism is set at the end of the input shaft of the blade 406, and a polygonal groove matching the polygonal prism is set at the end of the output shaft 305. When the cutter head frame is fixedly connected to the power frame 3 by bolts, the polygonal prism is inserted into the polygonal groove.

[0040] The cutter head mounting frame 303 is internally provided with an electronic gyroscope for detecting its own pitch angle.

[0041] The crank arm 2 includes no less than three sections of crank arm rods, and a telescopic rod for controlling the relative angle is arranged between two adjacent groups of crank arm rods.

[0042] The end mounting frame 201 and the top end of the crank arm 2 are rotatably mounted along a vertical axis, and a driving portion for driving the rotation is arranged between the two.

[0043] When using:

[0044] See also Figure 8-Figure 10 A bucket-type light truck is used as the load-bearing vehicle, and the vehicle-mounted chassis 1 is fixed in the bucket. The lead screw and the light rod are arranged transversely along the bucket, that is, the sliding seat at the bottom end of the crank arm 2 can move transversely along the load-bearing vehicle, and all internal driving motors are driven by 48v 115Ah or 48V 100Ah lead-acid batteries placed in the bucket; the output shaft speed is 7600rap, that is, when the blade 406 is used for shearing, the blade speed is 7600rap, and the recommended vehicle travel speed during operation is 0-5km / h.

[0045] The power frame 3 includes a cutter disc mounting frame 303 for connecting to the cutter disc frame and a connecting frame 301 for connecting to the end mounting frame 201. The cutter disc mounting frame 303 is fixedly installed with the connecting frame 301, and a third motor 302 for driving the power spindle 304 to rotate is placed inside the connecting frame 301 and is connected to the power spindle 304 through a gear pair. A first motor 202 is arranged between the connecting frame 301 and the end mounting frame 201 to drive both to rotate.

[0046] See also Figure 8 , which is a schematic diagram of trimming the top of the center dividing belt. The electronic gyroscope detects the posture of the blade mounting frame 303 and transmits the data to the control unit of the first motor 202 to control the rotation amount of the blade mounting frame 303 relative to the end mounting frame 201 to keep it horizontal. At the same time, the telescopic rod and the crank arm rod in the crank arm 2 are coordinated to adjust the pruning head 4 to the trimming height; at this time, the pruning head 4 uses a blade 406 to output high-speed rotation power through the output shaft 305 to trim the top of the center dividing belt.

[0047] See also Figure 9-10 , is a schematic diagram of pruning the side of the center strip. The position of the sliding seat is adjusted through the action in the vehicle-mounted chassis 1, and at the same time, the knife disc mounting frame 303 is controlled to rotate relative to the end mounting frame 201 through the first motor 202. At the same time, in the curved arm 2, under the action of the telescopic rod, the angle of the curved arm rod is adjusted until the knife disc mounting frame 303 is in a vertical state. During this process, the electronic gyroscope monitors the posture of the knife disc mounting frame 303 in real time, and transmits the data to the control unit of the curved arm 2 and the first motor 202, so as to ensure that the angle of the knife disc mounting frame 303 is controllable. When pruning the side, the chain saw should be replaced, in which the sprocket in the active sprocket group is driven by the output shaft 305, driving the chain saw blade 404 to rotate, and the thick branches and hard branches are cut.

[0048] See also Figure 5 and Figure 6 At the same time, during the design, the blade 406 and the chain saw are subjected to different forces. When designing the first blade disc frame 401 adapted to the blade 406, bolts are used to fix the blade 406 on both sides, and a raised portion is provided in the middle. The raised portion is used to install the input shaft of the blade 406 to ensure the stability of its rotation axis.

[0049] When designing the second blade holder 405 adapted to the chain saw, the driving sprocket set and the driven sprocket set are designed in double rows, and a recessed area for the chain saw blade 404 to retreat is provided on the surface of the blade holder corresponding to the driven sprocket set.

[0050] See also Figure 2A second motor 203 is provided at the end of the crank arm 2 for driving the cutter disc mounting frame 303 to rotate relative to the crank arm 2. When the width of the middle belt is smaller than the width of the cutter disc mounting frame 303, the cutter disc mounting frame 303 is driven by the second motor 203 to be tilted and placed on the top of the middle belt, so that all blades 406 can work and are evenly stressed.

[0051] At the same time, the power input of this equipment is mostly electrically driven. Compared with traditional chainsaws, it has the advantages of new energy such as low pollution, low noise, environmental protection and health.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A median strip trimmer for road maintenance, comprising a vehicle-mounted chassis (1), a crank arm (2), a power frame (3) and a trimming head (4), characterized in that: The crank arm (2) is of a multi-section bendable design, a sliding seat capable of sliding relative to the vehicle-mounted chassis (1) is provided at the bottom, an end mounting frame (201) for mounting the power frame (3) is provided at the top, and a driving unit for driving the mounting power frame (3) to rotate along a horizontal axis is provided inside the end mounting frame (201); The vehicle-mounted chassis (1) is capable of being fixed to an external vehicle and comprises a power mechanism and a guide mechanism for driving and guiding the sliding seat to slide; A power frame (3) is installed, wherein a plurality of sets of output shafts (305) arranged in parallel are arranged inside, and all the output shafts (305) are in power communication with a power main shaft (304) through a bevel gear pair, and the power main shaft (304) is in power communication with a driving unit for driving; A pruning head (4) comprises a blade frame for fixedly connecting to a mounting power frame (3), wherein a plurality of blades (406) or chain saws are rotatably mounted in the blade frame, and a power quick-release structure is provided between the input shaft of the blade (406) and the input shaft of the chain saw and the output shaft (305); The cutter disc frame is provided with a driven sprocket group located at the front end and a driving sprocket group located at the rear end, a power quick-release structure is provided between the sprocket in the driving sprocket group and the output shaft (305), a sprocket mounting seat (402) is provided for the sprocket in the driven sprocket group to rotate relative to each other, the sprocket mounting seat (402) is slidably mounted relative to the cutter disc frame, and an elastic member (403) is provided between the two along the relative movement direction, and when a chain saw blade (404) of the chain saw receives a force in a tangential direction, the chain saw blade (404) can drive the sprocket mounting seat (402) to slide backward to avoid the force.

2. The road maintenance center strip trimmer according to claim 1, characterized in that: The sprocket of the driving sprocket group is rotatably mounted on the cutter disc frame, and a polygonal prism is provided at the end of the sprocket. A polygonal groove matching the polygonal prism is provided at the end of the output shaft (305). When the cutter disc frame is fixedly connected to the power frame (3) by bolts, the polygonal prism is inserted into the polygonal groove.

3. The center strip trimmer for road maintenance according to claim 1, characterized in that: The axial spacing of the blades (406) in the cutter head frame is greater than the rotation diameter of the blades (406), and a polygonal prism is provided at the end of the input shaft of the blade (406), and a polygonal groove matching the polygonal prism is provided at the end of the output shaft (305), and when the cutter head frame is fixedly connected to the power frame (3) by bolts, the polygonal prism is inserted into the polygonal groove.

4. The road maintenance center strip trimmer according to claim 1, characterized in that: The power frame (3) comprises a cutterhead mounting frame (303) for connecting to the cutterhead frame and a connecting frame (301) for connecting to the end mounting frame (201); an electronic gyroscope for detecting its own pitch angle is arranged inside the cutterhead mounting frame (303).

5. The center strip trimmer for road maintenance according to claim 1, characterized in that: The crank arm (2) comprises crank arm rods of no less than three sections, and telescopic rods for controlling the relative angle are arranged between two adjacent groups of crank arm rods.

6. The center strip trimmer for road maintenance according to claim 1, characterized in that: The end mounting frame (201) and the top end of the crank arm (2) are rotatably mounted along a vertical axis, and a driving unit for driving the rotation is provided between the two.

Images