A device and method for continuous longitudinal laying of grass grids for sand fixation machines

Abstract

The present invention discloses a device and method for continuously laying grass grids in the longitudinal direction for a sand-fixing machine. The device includes a grass-laying mechanism, a guide mechanism, a laying mechanism, and a grass-cutting mechanism. The grass-laying direction is downwardly inclined. The grass-laying mechanism, the guide mechanism, and the laying mechanism are sequentially arranged along the laying direction. The grass-cutting mechanism is located below the guide mechanism. The grass-laying mechanism includes three parallel laying units. The method involves the following steps: when the sand-fixing machine advances, the first side-laying unit and the middle-laying unit of the grass-laying mechanism simultaneously lay out the grass grids. The grass-laying unit is then guided by the guide mechanism, inserted into the sand by the laying mechanism, and pressed into the sand. At the end of the stroke, the grass-cutting mechanism cuts the grass grids. The sand-fixing machine then reverses and enters the next stroke. During this stroke, the second side-laying unit and the middle-laying unit of the grass-laying mechanism simultaneously lay out the grass grids. The sand-fixing machine then reciprocates to lay the grass grids longitudinally. The present invention can effectively improve the efficiency and quality of the longitudinal laying of grass grids for sand-fixing machines.

Description

Technical Field

[0001] The invention relates to the technical field of windbreak and sand fixation, and in particular to a device and method for continuously laying grass grids longitudinally for a sand fixation machine. Background Art

[0002] Desertification, a global environmental problem, continues to plague the survival and development of human society. In recent years, with the deepening of ecological civilization construction, my country has continuously increased its investment in sand control and desertification prevention, placing higher demands on scientific and technological innovation in desertification prevention and control. Traditional artificial desertification control methods are gradually evolving towards mechanized, intelligent, and integrated approaches. Mechanized sand fixation technologies not only ensure effective sand control but also improve its efficiency, enabling the use of mechanical equipment for sand control and desertification prevention, accelerating the progress of desertification control. Mechanized sand control is more scientific and efficient, playing a vital role in environmental protection and ecological development. It deserves promotion in future desertification control efforts. Efforts to improve the mechanization of sand fixation and afforestation are now a pressing need for sand control and desertification prevention.

[0003] Planting straw grids is currently one of the most effective methods for windbreaks and sand fixation. As the name suggests, straw grids consist of bundles of discarded wheat straw laid out in a grid pattern on the sand. These bundles are then shoveled into the sand, leaving one-third or half of the straw standing naturally on the four sides. Sand is then pushed from the center of the grid toward the straw roots, ensuring the straw stands firmly on the sand. Compared to manually planting straw grids, mechanical planting with a sand fixation machine is more efficient and economical.

[0004] The longitudinal grass-inserting mechanism (also known as the longitudinal laying mechanism or longitudinal laying device) is a key component of the sand-fixing machine. Combined with the transverse grass-inserting mechanism, it forms the machine's core mechanism. As the machine continuously advances, the two mechanisms simultaneously insert grass both transversely and longitudinally, forming a "fence"-like grid of grass. Unlike the intermittent laying method of the transverse grass-inserting mechanism, the longitudinal grass-inserting mechanism requires continuous laying. However, in existing sand-fixing machines, the longitudinal grass-inserting mechanism often only inserts grass row by row, following the machine's reciprocating linear motion. This results in low laying efficiency and a high rate of compaction of the already laid transverse grass barrier, ultimately impacting both laying efficiency and quality. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a continuous longitudinal laying device for grass grids for a sand-fixing machine, which can effectively improve the longitudinal laying efficiency and laying quality of the grass grids of the sand-fixing machine.

[0006] Another object of the present invention is to provide a method for continuous longitudinal laying of grass grids achieved by the above-mentioned device.

[0007] The technical solution of the present invention is: a continuous longitudinal laying device of grass grids for a sand fixation machine, comprising a grass placing mechanism, a guide mechanism, a laying mechanism and a grass cutting mechanism, the grass placing direction of the straw mat is inclined downward, the grass placing mechanism, the guide mechanism and the laying mechanism are arranged in sequence along the grass placing direction, and the grass cutting mechanism is arranged below the guide mechanism; wherein, the grass placing mechanism is provided with three parallel grass placing units, correspondingly, the guide mechanism is provided with three parallel guide units, the laying mechanism is provided with three parallel laying units, and the grass cutting mechanism is also provided with three parallel grass cutting units. Among them, the straw mat is in a roll shape (also called straw roll) and is installed on the grass-releasing mechanism. A grass roll is independently arranged in each grass-releasing unit. The three grass-releasing units are linked by a linkage mechanism, so that the grass-releasing unit on one side and the middle grass-releasing unit move synchronously, while the grass-releasing unit on the other side remains stationary; the guide mechanism mainly guides the straw mat released by the grass-releasing mechanism, and guides the straw mat to the corresponding sand ground under the laying mechanism; in the process of the sand-fixing machine moving forward, the laying mechanism continuously inserts the straw mat into the sand and covers the sand simultaneously.

[0008] The grass-laying mechanism comprises a first side grass-laying unit, a middle grass-laying unit, a second side grass-laying unit and a driving unit;

[0009] The drive unit includes a first drive motor, a drive shaft, a power transmission assembly, a first side drive wheel, a second side drive wheel, a first bevel gear, a second bevel gear and a third bevel gear. The power output end of the first drive motor is connected to the drive shaft through the power transmission assembly. The drive shaft is provided with a first side drive wheel, a second side drive wheel, a first bevel gear and a second bevel gear. One-way bearings are respectively provided at the connections between the first side drive wheel, the second side drive wheel, the first bevel gear, the second bevel gear and the drive shaft. The first bevel gear, the second bevel gear and the third bevel gear are meshed and connected in sequence; the first side grass-feeding unit is connected to the first side drive wheel, the middle grass-feeding unit is connected to the third bevel gear, and the second side grass-feeding unit is connected to the second side drive wheel.

[0010] In the grass-laying mechanism, the first-side driving wheel is a driving spur gear, the second-side driving wheel is a driving sprocket, and the third bevel gear serves as the driving wheel of the middle grass-laying unit;

[0011] The first side grass releasing unit comprises a first side grass releasing shaft and a transmission gear set, wherein the first side grass releasing shaft is connected to the first side driving wheel via the transmission gear set;

[0012] The middle grass-feeding unit includes a middle unwinding shaft, an end bevel gear set and an middle connecting shaft, one end of the end bevel gear set is connected to the end of the middle unwinding shaft, and the other end of the end bevel gear set is connected to the third bevel gear through the middle connecting shaft;

[0013] The second side grass releasing unit includes a second side grass releasing reel and a transmission chain assembly, and the second side grass releasing reel is connected to the second side driving wheel through the transmission chain assembly.

[0014] In the drive unit, the one-way bearing at the first side drive wheel is in the same direction as the one-way bearing at the second bevel gear, the one-way bearing at the second side drive wheel is in the same direction as the one-way bearing at the first bevel gear, and the one-way bearing at the first bevel gear is in the opposite direction to the one-way bearing at the second bevel gear.

[0015] In the above-mentioned grass-laying mechanism, by providing multiple one-way bearings in the drive unit, when the first drive motor rotates forward and reverse, the first side grass-laying unit and the middle grass-laying unit form a group of synchronously running grass-laying units, and the second side grass-laying unit and the middle grass-laying unit form another group of synchronously running grass-laying units, respectively adapting to the repeated forward and reverse movements of the sand-fixing machine. The two units lay grass simultaneously, and then insert the grass, which can effectively improve the paving efficiency. The specific process is as follows:

[0016] When the sand-fixing machine moves forward, the first drive motor rotates forward, driving the first side drive wheel and the second bevel gear to move synchronously through the drive shaft. At this time, the first bevel gear and the second side drive wheel remain stationary under the action of their corresponding one-way bearings, and the first side drive wheel drives the first side grass-releasing unit to release the straw curtain. At the same time, the second bevel gear also drives the middle grass-releasing unit to release the straw curtain through the third bevel gear, and the two release the straw curtain synchronously; when the sand-fixing machine moves forward in the reverse direction, the first drive motor rotates in the reverse direction, driving the second side drive wheel and the first bevel gear to move synchronously through the drive shaft. At this time, the second bevel gear and the first side drive wheel remain stationary under the action of their corresponding one-way bearings, and the second side drive wheel drives the second side grass-releasing unit to release the straw curtain. At the same time, the first bevel gear also drives the middle grass-releasing unit to release the straw curtain through the third bevel gear, and the two release the straw curtain synchronously.

[0017] The guide mechanism includes a second drive motor, a drive end gear set, a guide shaft and a guide wheel. The power output end of the second drive motor is connected to one end of the guide shaft through the drive end gear set. A plurality of guide wheels are distributed on the guide shaft.

[0018] Among the guide wheels on the guide shaft, the guide wheels located obliquely below the first side grass-feeding unit constitute the first side guide unit, the guide wheels located obliquely below the middle grass-feeding unit constitute the middle guide unit, and the guide wheels located obliquely below the second side grass-feeding unit constitute the second side guide unit.

[0019] When the grass-releasing mechanism is in operation, the second drive motor in the guide mechanism starts, driving the guide shaft to rotate via the drive-end gear set, thereby driving the guide wheels to rotate synchronously. During this process, the guide wheels in each guide unit all move synchronously. In the guide unit where no grass mat is being released, the guide wheels simply idle. However, the outermost linear speed of the guide wheels must be greater than the grass-releasing mechanism's grass-releasing speed to effectively utilize the friction generated by the relative motion between the guide wheels and the grass mat to propel the grass mat to the set position and direction.

[0020] The laying mechanism includes a laying cylinder, a laying wheel, a first connecting rod assembly, a covering pressure cylinder, a covering pressure arm, a second connecting rod assembly and a laying bracket; the laying wheel is installed on the laying bracket through the first connecting rod assembly, the laying cylinder is connected to the first connecting rod assembly, and the laying cylinder drives the laying wheel to rise and fall relative to the sand through the first connecting rod assembly; the covering pressure arm is installed on the laying bracket through the second connecting rod assembly, the covering pressure cylinder is connected to the covering pressure arm, and the covering pressure cylinder drives the covering pressure arm to rise and fall relative to the sand; the covering pressure arm is located on the outside of the laying wheel.

[0021] In the laying mechanism, the covering arm includes a first side arm, a second side arm and a middle connecting arm. The first side arm and the second side arm are vertically arranged in parallel. The two ends of the middle connecting arm are connected between the first side arm and the second side arm. The covering cylinder is arranged on the middle connecting arm. Along the forward direction of the laying wheel, the first side arm and the second side arm are respectively located on both sides of the laying wheel.

[0022] In the laying mechanism, the laying cylinder, the first connecting rod assembly and the laying wheel corresponding to the first side grass laying unit obliquely below the first side grass laying unit constitute the first side laying unit, the laying cylinder, the first connecting rod assembly and the laying wheel corresponding to the middle grass laying unit obliquely below the middle grass laying unit constitute the middle laying unit, and the laying cylinder, the first connecting rod assembly and the laying wheel corresponding to the second side grass laying unit obliquely below the second side grass laying unit constitute the second side laying unit;

[0023] The covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the first side paving unit constitute a first side covering unit, the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the middle paving unit constitute an middle covering unit, and the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the second side paving unit constitute a second side covering unit.

[0024] In the above-mentioned laying mechanism, the three laying units (including the above-mentioned first side laying unit, the middle laying unit, and the second side laying unit) and the three covering and pressing units (including the above-mentioned first side covering and pressing unit, the middle covering and pressing unit, and the second side covering and pressing unit) respectively correspond to the three grass-laying units. During the laying process of the straw mat, the laying unit and the covering and pressing unit operate synchronously. In the laying unit, the laying cylinder is driven by an external air pump to operate, and the first connecting rod assembly is used to push the laying wheel down to the lowest position. During the descent of the laying wheel, the vertical upward reaction force from the ground is overcome by the thrust of the laying cylinder. When it reaches the lowest point, the cylinder shaft presses against the laying wheel to achieve self-locking in the vertical direction, and the outer side of the laying mechanism is The bracket limits the laying wheel from moving backward, realizing self-locking in the horizontal direction, that is, this position is the dead point position of the laying wheel, so that the laying wheel can follow the progress of the sand-fixing machine to stably plant straw mats; at the same time, the external air pump also drives the laying cylinder to operate, and the second connecting rod assembly is used to push the covering pressure arm down to the lowest position. At the lowest point, the cylinder shaft supports the covering pressure arm to realize self-locking in the vertical direction. Through the four-bar structure (that is, the second connecting rod assembly), the covering pressure arm can maintain horizontal stability when moving with the sand-fixing machine, that is, this position is also the dead point position of the covering pressure mechanism. At the same time, the covering pressure cylinder is used to push the covering pressure arm, which can also reduce the rigid impact received by the covering pressure arm during operation.

[0025] The grass cutting mechanism includes a grass pressing component and a cutting component that cooperate with each other;

[0026] The grass pressing assembly includes a grass pressing servo, a grass pressing gear, a grass pressing rack, a grass pressing frame, a grass pressing plate and a guide shaft. The power output end of the grass pressing servo is connected to the grass pressing gear, the grass pressing gear is meshed with the grass pressing rack, the grass pressing frame is fixedly connected to the grass pressing rack, the grass pressing plate is installed on the grass pressing frame through a first connecting rod, a spring is sleeved on the first connecting rod, and guide shafts are respectively provided on both sides of the grass pressing frame.

[0027] The cutting assembly includes a cutting servo, a cutting gear, a cutting rack, a cutter and a second connecting rod. The power output end of the cutting servo is connected to the cutting gear, the cutting gear is meshed with the cutting rack, and the cutter is fixedly connected to the cutting rack through the second connecting rod.

[0028] The grass pressing plate comprises an upper pressing plate and a lower pressing plate which are arranged in parallel and move synchronously, and a cutter is arranged between the upper pressing plate and the lower pressing plate.

[0029] In the above-mentioned grass cutting mechanism, during the operation of the sand fixing machine, after the straw mat comes out of the guide mechanism, it passes through the grass cutting mechanism, and at this time the grass cutting mechanism is in the initial position. When the sand fixing machine works to the end of paving, the grass pressing servo is started first, and the grass pressing gear is driven to rotate through the corresponding transmission shaft, thereby driving the grass pressing rack to move linearly, and the grass pressing rack drives the grass pressing frame to move along the guide shaft, so that the grass pressing plate on the grass pressing frame extends and presses the straw mat on the inner wall of the bracket outside it. After that, the grass pressing plate will remain stationary, and the grass pressing frame continues to move forward a certain distance. At this time, the spring sleeved on the first connecting rod is compressed, and the elastic force generated by the spring compression is equal to the pressure on the straw mat; then the cutting servo is started, and the cutting gear is driven to rotate through the corresponding transmission shaft, thereby driving the cutting rack to move linearly, so that the second connecting rod drives the cutter to extend and cut the straw mat; after completion, the cutting servo and the grass pressing servo rotate in opposite directions respectively, so that each mechanism returns to the initial position and waits for the next grass cutting.

[0030] The present invention realizes a continuous longitudinal laying method of grass grids for a sand fixation machine through the above-mentioned continuous longitudinal laying device, which includes the following steps:

[0031] (1) When the sand fixation machine moves forward, the first side grass placing unit and the middle grass placing unit in the grass placing mechanism release the straw mats synchronously; the released straw mats are guided to the sand by the guide mechanism; and then inserted into the sand by the laying mechanism, and the sand is covered and pressed synchronously;

[0032] (2) When the sand fixation machine moves forward to the end of its stroke, the grass cutting mechanism is activated to cut off the corresponding two straw mats; the laying mechanism continues to insert the cut straw mats into the sand and simultaneously covers and presses the sand;

[0033] (3) The sand fixation machine turns around and moves in the opposite direction. The second side grass placing unit and the middle grass placing unit in the grass placing mechanism release the straw mats synchronously. The released straw mats are guided to the sand by the guide mechanism. The laying mechanism then inserts the straw mats into the sand and simultaneously covers and presses the sand.

[0034] (4) When the sand fixation machine moves in the reverse direction to the end of its stroke, the grass cutting mechanism is activated to cut off the corresponding two straw mats; the laying mechanism continues to insert the cut straw mats into the sand and simultaneously covers and presses the sand;

[0035] (5) The sand fixation machine turns around and repeats steps (1) to (4) to continuously lay the grass grid longitudinally.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The continuous longitudinal laying device and method of grass grids for the sand-fixing machine realizes uninterrupted laying of grass grids during the reciprocating movement of the sand-fixing machine by setting up multiple groups of grass-laying units, laying units and other mechanisms for alternating use, thereby effectively improving the grass grid laying efficiency and laying quality of the sand-fixing machine.

[0038] In the grass grid continuous longitudinal laying device used in this sand-fixing machine, an ingenious power transmission device is formed by using one-way bearings, bevel gears, spur gears, sprockets and other components in the grass-laying mechanism. Therefore, only a single drive motor is needed as the power source. By controlling its forward and reverse motion, the use switching between multiple groups of different grass-laying units can be achieved, which can greatly simplify the equipment structure, reduce the use of a large number of power components, and reduce the weight and manufacturing cost of the entire sand-fixing machine.

[0039] In the straw grid continuous longitudinal laying device used in the sand fixation machine, the laying mechanism can simultaneously cover and press the sand during the process of longitudinally laying the straw mat, thereby further improving the laying quality.

[0040] In the grass grid continuous longitudinal laying device used in this sand-fixing machine, the grass cutting mechanism is set up, which can realize automatic and timely cutting of the straw mat when the sand-fixing machine reaches the end of laying (or the end of the stroke), so that the sand-fixing machine can turn around and enter the next laying stroke in time, which can reduce manual intervention and greatly improve the laying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the structure of the herbal grid continuous longitudinal laying device.

[0042] Figure 2 It is a structural diagram of the grass-laying mechanism.

[0043] Figure 3 Schematic diagram of the power transmission principle of the grass-laying mechanism

[0044] Figure 4 Schematic diagram of the structure of the guide mechanism.

[0045] Figure 5 This is a schematic diagram of the principle of the grass-releasing mechanism releasing the straw mat to the guide mechanism.

[0046] Figure 6 Schematic diagram of the structure of the laying mechanism.

[0047] Figure 7 It is a structural diagram of the laying mechanism from another angle.

[0048] Figure 8 Schematic diagram of the structure of the grass cutting mechanism.

[0049] Figure 9 This is a top view of the grass cutting mechanism.

[0050] Figure 10 It is a side view of the grass cutting mechanism.

[0051] Figure 11 This is a schematic diagram of the laying principle when the herbal grid continuous longitudinal laying device is used.

[0052] In the above figures, the components indicated by the reference numerals are as follows:

[0053] 1 is the vertical straw curtain, 2 is the horizontal straw curtain, and 3 is the straw roll;

[0054] 4 is the grass-feeding mechanism, 4-1 is the first drive motor, 4-2 is the drive shaft, 4-3 is the power transmission assembly, 4-4 is the first side drive wheel, 4-5 is the second side drive wheel, 4-6 is the first bevel gear, 4-7 is the second bevel gear, 4-8 is the third bevel gear, 4-9 is the one-way bearing, 4-10 is the first side unwinding shaft, 4-11 is the transmission gear set, 4-12 is the middle unwinding shaft, 4-13 is the end bevel gear set, 4-14 is the middle connecting shaft, 4-15 is the second side unwinding shaft, and 4-16 is the transmission chain assembly;

[0055] 5 is the guide mechanism, 5-1 is the second drive motor, 5-2 is the drive end gear set, 5-3 is the guide shaft, and 5-4 is the guide wheel;

[0056] 6 is the laying mechanism, 6-1 is the laying cylinder, 6-2 is the laying wheel, 6-3 is the first connecting rod assembly, 6-4 is the covering pressure cylinder, 6-5 is the covering pressure arm, 6-6 is the second connecting rod assembly, 6-7 is the laying bracket, 6-8 is the first side arm, 6-9 is the second side arm, and 6-10 is the middle connecting arm;

[0057] 7 is the grass cutting mechanism, 7-1 is the grass pressing servo, 7-2 is the grass pressing gear, 7-3 is the grass pressing rack, 7-4 is the grass pressing frame, 7-5 is the grass pressing plate, 7-6 is the guide shaft, 7-7 is the cutting servo, 7-8 is the cutting gear, 7-9 is the cutting rack, 7-10 is the cutter, 7-11 is the second connecting rod, 7-12 is the upper pressure plate, 7-13 is the lower pressure plate, and 7-14 is the frame. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below with reference to the examples, but the embodiments of the present invention are not limited thereto.

[0059] Example

[0060] This embodiment provides a continuous longitudinal laying device and method for grass grids used in a sand fixation machine. The longitudinal laying device can be used synchronously with the existing transverse laying device in the same sand fixation machine. The laying direction of the grass grids is as follows: Figure 11As shown, the overall laying method is fence-like. The direction of the arrow in the figure is the moving direction of the sand-fixing machine. The longitudinal straw mat 1 is laid continuously along the moving direction of the sand-fixing machine, and the transverse straw mat 2 is laid intermittently in the direction perpendicular to the moving direction of the sand-fixing machine.

[0061] like Figure 1 As shown, the continuous longitudinal laying device of the grass grid of this embodiment includes a grass laying mechanism 4, a guide mechanism 5, a laying mechanism 6, and a grass cutting mechanism 7. The grass laying direction of the grass mat is inclined downward. The grass laying mechanism, the guide mechanism, and the laying mechanism are arranged in sequence along the grass laying direction, and the grass cutting mechanism is arranged below the guide mechanism. The grass laying mechanism is provided with three parallel grass laying units. Correspondingly, the guide mechanism is provided with three parallel guide units, the laying mechanism is provided with three parallel laying units, and the grass cutting mechanism is also provided with three parallel cutting units. The grass mat is in the form of a roll (also called a grass roll) and is arranged on the grass laying mechanism. Each grass laying unit has an independent grass roll. The three grass laying units are linked by a linkage mechanism, so that the grass laying unit on one side and the middle grass laying unit on the other side move synchronously, while the grass laying unit on the other side remains stationary. The guide mechanism mainly guides the grass mat released by the grass laying mechanism, guiding the grass mat to the corresponding sand ground below the laying mechanism. As the sand fixation machine moves forward, the laying mechanism continuously inserts the grass mat into the sand ground and simultaneously covers and compacts the sand. The specific structure of each component organization is as follows:

[0062] like Figure 2As shown, the grass-feeding mechanism includes a first side grass-feeding unit, an intermediate grass-feeding unit, a second side grass-feeding unit and a drive unit. The drive unit includes a first drive motor 4-1, a drive shaft 4-2, a power transmission assembly 4-3 (not fully shown in the figure, and the transmission chain is not shown), a first side drive wheel 4-4, a second side drive wheel 4-5, a first bevel gear 4-6, a second bevel gear 4-7 and a third bevel gear 4-8. The power output end of the first drive motor is connected to the drive shaft through the power transmission assembly. The drive shaft is provided with a first side drive wheel, a second side drive wheel, a first bevel gear and a second bevel gear, and the first side drive wheel, the second side drive wheel, the first bevel gear, the second bevel gear and the drive shaft are connected at their respective locations with a one-way bearing 4-9, and the first bevel gear, the second bevel gear and the third bevel gear are meshed and connected in sequence; the first side grass-feeding unit is connected to the first side drive wheel, the intermediate grass-feeding unit is connected to the third bevel gear, and the second side grass-feeding unit is connected to the second side drive wheel. Among them, the first side driving wheel is a driving spur gear, the second side driving wheel is a driving sprocket, and the third bevel gear serves as the driving wheel of the intermediate grass-feeding unit; the first side grass-feeding unit includes a first side unwinding shaft 4-10 and a transmission gear set 4-11, and the first side unwinding shaft is connected to the first side driving wheel through the transmission gear set; the intermediate grass-feeding unit includes an intermediate unwinding shaft 4-12, an end bevel gear set 4-13 and an intermediate connecting shaft 4-14, one end of the end bevel gear set is connected to the end of the intermediate unwinding shaft, and the other end of the end bevel gear set is connected to the third bevel gear through the intermediate connecting shaft; the second side grass-feeding unit includes a second side unwinding shaft 4-15 and a transmission chain assembly 4-16 (not fully shown in the figure, and the transmission chain is not shown), and the second side unwinding shaft is connected to the second side driving wheel through the transmission chain assembly. Figure 3 As shown, in the drive unit, the one-way bearing at the first side drive wheel is in the same direction as the one-way bearing at the second bevel gear, the one-way bearing at the second side drive wheel is in the same direction as the one-way bearing at the first bevel gear, and the one-way bearing at the first bevel gear is in the opposite direction to the one-way bearing at the second bevel gear.

[0063] In the above-mentioned grass-laying mechanism, by arranging multiple one-way bearings in the driving unit, when the first driving motor rotates forward and reverse, the first side grass-laying unit and the middle grass-laying unit form a group of synchronously running grass-laying units, and the second side grass-laying unit and the middle grass-laying unit form another group of synchronously running grass-laying units, which respectively adapt to the repeated forward and reverse movements of the sand-fixing machine. The two units lay grass at the same time, and then insert the grass, which can effectively improve the paving efficiency. The specific process is as follows: when the sand-fixing machine moves forward, the first drive motor rotates forward, driving the first side drive wheel and the second bevel gear to move synchronously through the drive shaft. At this time, the first bevel gear and the second side drive wheel remain stationary under the action of their corresponding one-way bearings, and the first side drive wheel drives the first side grass-releasing unit to release the grass curtain. At the same time, the second bevel gear also drives the middle grass-releasing unit to release the grass curtain through the third bevel gear, and the two release the grass curtain synchronously; when the sand-fixing machine moves backward, the first drive motor rotates backward, driving the second side drive wheel and the first bevel gear to move synchronously through the drive shaft. At this time, the second bevel gear and the first side drive wheel remain stationary under the action of their corresponding one-way bearings, and the second side drive wheel drives the second side grass-releasing unit to release the grass curtain. At the same time, the first bevel gear also drives the middle grass-releasing unit to release the grass curtain through the third bevel gear, and the two release the grass curtain synchronously.

[0064] like Figure 4 As shown, the guide mechanism includes a second drive motor 5-1, a drive-end gear set 5-2, a guide shaft 5-3, and guide wheels 5-4. The power output of the second drive motor is connected to one end of the guide shaft via the drive-end gear set. Several guide wheels are distributed on the guide shaft. The guide wheels on the guide shaft correspond to the guide wheels located diagonally below the first side grass-feeding unit, constitute the first side guide unit, the guide wheels located diagonally below the middle grass-feeding unit, constitute the middle guide unit, and the guide wheels located diagonally below the second side grass-feeding unit, constitute the second side guide unit.

[0065] When the grass-laying mechanism is in operation, Figure 5 As shown, in the guide mechanism described above, the second drive motor is activated, driving the guide shaft to rotate via the drive-end gear set, thereby driving the guide wheels to rotate synchronously. During this process, the guide wheels in each guide unit all move synchronously. In the guide unit where no straw mat is being released, the guide wheels simply idle. However, the outermost linear speed of the guide wheels must be greater than the release speed of the straw release mechanism to effectively utilize the friction generated by the relative motion between the guide wheels and the straw mat to propel the straw mat to the set position and direction.

[0066] like Figure 6 or Figure 7As shown, the laying mechanism includes a laying cylinder 6-1, a laying wheel 6-2, a first connecting rod assembly 6-3, a covering pressure cylinder 6-4, a covering pressure arm 6-5, a second connecting rod assembly 6-6 and a laying bracket 6-7; the laying wheel is installed on the laying bracket through the first connecting rod assembly, the laying cylinder is connected to the first connecting rod assembly, and the laying cylinder drives the laying wheel to rise and fall relative to the sand through the first connecting rod assembly; the covering pressure arm is installed on the laying bracket through the second connecting rod assembly, the covering pressure cylinder is connected to the covering pressure arm, and the covering pressure cylinder drives the covering pressure arm to rise and fall relative to the sand; the covering pressure arm is located outside the laying wheel. Figure 7 As shown, the covering arm includes a first side arm 6-8, a second side arm 6-9 and a middle connecting arm 6-10. The first side arm and the second side arm are vertically arranged in parallel, the two ends of the middle connecting arm are connected between the first side arm and the second side arm, and the covering cylinder is arranged on the middle connecting arm; along the forward direction of the paving wheel, the first side arm and the second side arm are respectively located on both sides of the paving wheel. In the above-mentioned laying mechanism, the laying cylinder, first connecting rod assembly and laying wheel corresponding to the position obliquely below the first side grass-laying unit constitute the first side laying unit, the laying cylinder, first connecting rod assembly and laying wheel corresponding to the position obliquely below the middle grass-laying unit constitute the middle laying unit, and the laying cylinder, first connecting rod assembly and laying wheel corresponding to the position obliquely below the second side grass-laying unit constitute the second side laying unit; the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the first side laying unit constitute the first side covering unit, the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the middle laying unit constitute the middle covering unit, and the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the second side laying unit constitute the second side covering unit.

[0067] In the above-mentioned laying mechanism, the three laying units (including the above-mentioned first side laying unit, the middle laying unit, and the second side laying unit) and the three covering and pressing units (including the above-mentioned first side covering and pressing unit, the middle covering and pressing unit, and the second side covering and pressing unit) respectively correspond to the three grass-laying units. During the laying process of the straw mat, the laying unit and the covering and pressing unit operate synchronously. In the laying unit, the laying cylinder is driven by an external air pump to operate, and the first connecting rod assembly is used to push the laying wheel down to the lowest position. During the descent of the laying wheel, the vertical upward reaction force from the ground is overcome by the thrust of the laying cylinder. When it reaches the lowest point, the cylinder shaft presses against the laying wheel to achieve self-locking in the vertical direction, and the outer side of the laying mechanism is The bracket limits the laying wheel from moving backward, realizing self-locking in the horizontal direction, that is, this position is the dead point position of the laying wheel, so that the laying wheel can follow the progress of the sand-fixing machine to stably plant straw mats; at the same time, the external air pump also drives the laying cylinder to operate, and the second connecting rod assembly is used to push the covering pressure arm down to the lowest position. At the lowest point, the cylinder shaft supports the covering pressure arm to realize self-locking in the vertical direction. Through the four-bar structure (that is, the second connecting rod assembly), the covering pressure arm can maintain horizontal stability when moving with the sand-fixing machine, that is, this position is also the dead point position of the covering pressure mechanism. At the same time, the covering pressure cylinder is used to push the covering pressure arm, which can also reduce the rigid impact received by the covering pressure arm during operation.

[0068] like Figure 8 or Figure 9 As shown, the grass cutting mechanism includes a grass pressing component and a cutting component that cooperate with each other. Among them, the grass pressing component includes a grass pressing servo 7-1, a grass pressing gear 7-2, a grass pressing rack 7-3, a grass pressing frame 7-4, a grass pressing plate 7-5 and a guide shaft 7-6. The power output end of the grass pressing servo is connected to the grass pressing gear, the grass pressing gear is meshed with the grass pressing rack, the grass pressing frame is fixedly connected to the grass pressing rack, the grass pressing plate is installed on the grass pressing frame through a first connecting rod, and a spring (not shown in the figure) is sleeved on the first connecting rod. Guide shafts are respectively provided on both sides of the grass pressing frame; the cutting component includes a cutting servo 7-7, a cutting gear 7-8, a cutting rack 7-9, a cutter 7-10 and a second connecting rod 7-11. The power output end of the cutting servo is connected to the cutting gear, the cutting gear is meshed with the cutting rack, and the cutter is fixedly connected to the cutting rack through the second connecting rod; as shown Figure 10 As shown, the grass pressing plate includes an upper pressing plate 7-12 and a lower pressing plate 7-13 which are arranged in parallel and move synchronously, and a cutter is arranged between the upper pressing plate and the lower pressing plate.

[0069] In the above-mentioned grass cutting mechanism, during the operation of the sand fixing machine, after the straw mat comes out of the guide mechanism, it passes through the grass cutting mechanism, and the grass cutting mechanism is in the initial position. When the sand fixing machine reaches the end of paving, the grass pressing servo is started first, and the grass pressing gear is driven to rotate by the corresponding transmission shaft, thereby driving the grass pressing rack to perform linear motion, and the grass pressing rack drives the grass pressing frame to move along the guide shaft, so that the grass pressing plate on the grass pressing frame extends, pressing the straw mat on the inner wall of the frame 7-14 outside it, and then the grass pressing plate will remain stationary, and the grass pressing frame continues to move forward a certain distance, at which time the spring sleeved on the first connecting rod is compressed, and the elastic force generated by the spring compression is equal to the pressure exerted on the straw mat; then the cutting servo is started, and the cutting gear is driven to rotate by the corresponding transmission shaft, thereby driving the cutting rack to perform linear motion, so that the second connecting rod drives the cutter to extend and cut the straw mat; after completion, the cutting servo and the grass pressing servo rotate in opposite directions respectively, so that each mechanism returns to the initial position and waits for the next grass cutting.

[0070] This embodiment can realize a continuous longitudinal laying method of grass grids for sand fixation machines through the above-mentioned continuous longitudinal laying device, such as Figure 11 As shown, the following steps are included:

[0071] (1) When the sand fixation machine moves forward, the first side grass placing unit and the middle grass placing unit in the grass placing mechanism release the straw mats synchronously; the released straw mats are guided to the sand by the guide mechanism; and then inserted into the sand by the laying mechanism, and the sand is covered and pressed synchronously;

[0072] (2) When the sand fixation machine moves forward to the end of its stroke, the grass cutting mechanism is activated to cut off the corresponding two straw mats; the laying mechanism continues to insert the cut straw mats into the sand and simultaneously covers and presses the sand;

[0073] (3) The sand fixation machine turns around and moves in the opposite direction. The second side grass placing unit and the middle grass placing unit in the grass placing mechanism release the straw mats synchronously. The released straw mats are guided to the sand by the guide mechanism. The laying mechanism then inserts the straw mats into the sand and simultaneously covers and presses the sand.

[0074] (4) When the sand fixation machine moves in the reverse direction to the end of its stroke, the grass cutting mechanism is activated to cut off the corresponding two straw mats; the laying mechanism continues to insert the cut straw mats into the sand and simultaneously covers and presses the sand;

[0075] (5) The sand fixation machine turns around and repeats steps (1) to (4) to continuously lay the grass grid longitudinally.

[0076] As described above, the present invention can be better implemented. The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made based on the content of the present invention are covered by the scope of protection required by the claims of the present invention.

Claims

1. A continuous longitudinal laying device for grass grids used in sand fixation machines, characterized in that: The grass laying mechanism comprises a grass laying mechanism, a guide mechanism, a laying mechanism and a grass cutting mechanism. The grass laying direction of the grass mat is inclined downward. The grass laying mechanism, the guide mechanism and the laying mechanism are arranged in sequence along the grass laying direction, and the grass cutting mechanism is arranged below the guide mechanism. The grass laying mechanism is provided with three parallel grass laying units, and correspondingly, the guide mechanism is provided with three parallel guide units, the laying mechanism is provided with three parallel laying units, and the grass cutting mechanism is also provided with three parallel grass cutting units. The laying mechanism includes a laying cylinder, a laying wheel, a first connecting rod assembly, a covering pressure cylinder, a covering pressure arm, a second connecting rod assembly and a laying bracket; the laying wheel is mounted on the laying bracket via the first connecting rod assembly, the laying cylinder is connected to the first connecting rod assembly, and the laying cylinder drives the laying wheel to rise and fall relative to the sand through the first connecting rod assembly; the covering pressure arm is mounted on the laying bracket via the second connecting rod assembly, the covering pressure cylinder is connected to the covering pressure arm, and the covering pressure cylinder drives the covering pressure arm to rise and fall relative to the sand; the covering pressure arm is located outside the laying wheel; The grass-laying mechanism comprises a first side grass-laying unit, a middle grass-laying unit, a second side grass-laying unit and a driving unit; The driving unit includes a first driving motor, a driving shaft, a power transmission assembly, a first side driving wheel, a second side driving wheel, a first bevel gear, a second bevel gear and a third bevel gear. The power output end of the first driving motor is connected to the driving shaft through the power transmission assembly. The driving shaft is provided with a first side driving wheel, a second side driving wheel, a first bevel gear and a second bevel gear. One-way bearings are respectively provided at the connection points of the first side driving wheel, the second side driving wheel, the first bevel gear, the second bevel gear and the driving shaft. The first bevel gear, the second bevel gear and the third bevel gear are meshed and connected in sequence; the first side grass placing unit is connected to the first side driving wheel, the middle grass placing unit is connected to the third bevel gear, and the second side grass placing unit is connected to the second side driving wheel; In the grass-laying mechanism, the first-side driving wheel is a driving spur gear, the second-side driving wheel is a driving sprocket, and the third bevel gear serves as the driving wheel of the middle grass-laying unit; The first side grass releasing unit comprises a first side grass releasing shaft and a transmission gear set, wherein the first side grass releasing shaft is connected to the first side driving wheel via the transmission gear set; The middle grass-feeding unit includes a middle unwinding shaft, an end bevel gear set and an middle connecting shaft, one end of the end bevel gear set is connected to the end of the middle unwinding shaft, and the other end of the end bevel gear set is connected to the third bevel gear through the middle connecting shaft; The second side grass releasing unit comprises a second side releasing reel and a transmission chain assembly, wherein the second side releasing reel is connected to the second side driving wheel via the transmission chain assembly; In the drive unit, the one-way bearing at the first side drive wheel is in the same direction as the one-way bearing at the second bevel gear, the one-way bearing at the second side drive wheel is in the same direction as the one-way bearing at the first bevel gear, and the one-way bearing at the first bevel gear is in the opposite direction to the one-way bearing at the second bevel gear.

2. The continuous longitudinal laying device of grass grids for sand fixation machine according to claim 1, characterized in that: The guide mechanism includes a second drive motor, a drive end gear set, a guide shaft and a guide wheel. The power output end of the second drive motor is connected to one end of the guide shaft through the drive end gear set. A plurality of guide wheels are distributed on the guide shaft. Among the guide wheels on the guide shaft, the guide wheels located obliquely below the first side grass-feeding unit constitute the first side guide unit, the guide wheels located obliquely below the middle grass-feeding unit constitute the middle guide unit, and the guide wheels located obliquely below the second side grass-feeding unit constitute the second side guide unit.

3. The continuous longitudinal laying device of grass grids for sand fixation machine according to claim 1, characterized in that: In the laying mechanism, the covering arm includes a first side arm, a second side arm and a middle connecting arm. The first side arm and the second side arm are vertically arranged in parallel. The two ends of the middle connecting arm are connected between the first side arm and the second side arm. The covering cylinder is arranged on the middle connecting arm. Along the forward direction of the laying wheel, the first side arm and the second side arm are respectively located on both sides of the laying wheel.

4. The continuous longitudinal laying device of grass grids for sand fixation machine according to claim 1, characterized in that: In the laying mechanism, the laying cylinder, the first connecting rod assembly and the laying wheel corresponding to the first side grass laying unit obliquely below the first side grass laying unit constitute the first side laying unit, the laying cylinder, the first connecting rod assembly and the laying wheel corresponding to the middle grass laying unit obliquely below the middle grass laying unit constitute the middle laying unit, and the laying cylinder, the first connecting rod assembly and the laying wheel corresponding to the second side grass laying unit obliquely below the second side grass laying unit constitute the second side laying unit; The covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the first side paving unit constitute a first side covering unit, the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the middle paving unit constitute an middle covering unit, and the covering arm, covering cylinder and second connecting rod assembly corresponding to the outside of the second side paving unit constitute a second side covering unit.

5. The continuous longitudinal laying device of grass grids for sand fixation machine according to claim 1, characterized in that: The grass cutting mechanism includes a grass pressing component and a cutting component that cooperate with each other; The grass pressing assembly includes a grass pressing servo, a grass pressing gear, a grass pressing rack, a grass pressing frame, a grass pressing plate and a guide shaft. The power output end of the grass pressing servo is connected to the grass pressing gear, the grass pressing gear is meshed with the grass pressing rack, the grass pressing frame is fixedly connected to the grass pressing rack, the grass pressing plate is installed on the grass pressing frame through a first connecting rod, a spring is sleeved on the first connecting rod, and guide shafts are respectively provided on both sides of the grass pressing frame. The cutting assembly includes a cutting servo, a cutting gear, a cutting rack, a cutter and a second connecting rod. The power output end of the cutting servo is connected to the cutting gear, the cutting gear is meshed with the cutting rack, and the cutter is fixedly connected to the cutting rack through the second connecting rod. The grass pressing plate comprises an upper pressing plate and a lower pressing plate which are arranged in parallel and move synchronously, and a cutter is arranged between the upper pressing plate and the lower pressing plate.

6. A method for continuously laying grass grids in a longitudinal direction for a sand fixation machine is realized by using the grass grid continuous longitudinal laying device according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) When the sand fixation machine moves forward, the first side grass placing unit and the middle grass placing unit in the grass placing mechanism release the straw mats synchronously; the released straw mats are guided to the sand by the guide mechanism; and then inserted into the sand by the laying mechanism, and the sand is covered and pressed synchronously; (2) When the sand fixation machine moves forward to the end of its stroke, the grass cutting mechanism is activated to cut off the corresponding two straw mats; the laying mechanism continues to insert the cut straw mats into the sand and simultaneously covers and presses the sand; (3) The sand fixation machine turns around and moves in the opposite direction. The second side grass placing unit and the middle grass placing unit in the grass placing mechanism release the straw mats synchronously. The released straw mats are guided to the sand by the guide mechanism. The laying mechanism then inserts the straw mats into the sand and simultaneously covers and presses the sand. (4) When the sand fixation machine moves in the reverse direction to the end of its stroke, the grass cutting mechanism is activated to cut off the corresponding two straw mats; the laying mechanism continues to insert the cut straw mats into the sand and simultaneously covers and presses the sand; (5) The sand fixation machine turns around and repeats steps (1) to (4) to continuously lay the grass grid longitudinally.

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