Floating suspension type mower

Abstract

The utility model discloses a floating suspension type mower which comprises a frame body, a supporting arm which is arranged on the frame body and can rotate around the advancing direction of the frame body, a cutter rest is arranged on the supporting arm, a fixed cutter and a movable cutter are arranged on the cutter rest, and the floating suspension type mower further comprises a driving air cylinder or a driving hydraulic cylinder and a vertical floating mechanism. The driving air cylinder or the driving hydraulic cylinder is connected with the supporting arm and can drive the supporting arm to rotate around the frame body. The vertical floating mechanism comprises a first elastic component, a first rotary supporting seat and a first floating rod, the first elastic component is basically vertically arranged, the first floating rod is movably connected with the supporting arm, the first elastic component stores energy and abuts against the first rotary supporting seat, and the first floating rod penetrates through the first elastic component and the first rotary supporting seat and rotates along with the supporting arm. According to the floating suspension type mower, the cutter rest and the supporting arm are arranged in a floating suspension mode, the cutter rest can be folded, the turning radius is small, walking is flexible and convenient, the structure is simple, the requirement for tractor power is low, installation is convenient, vibration of the cutter rest is small, and the ground clearance is large.

Description

[0001] This application is a divisional application of the patent application number 202320633340.2, entitled A Floating Suspension Lawn Mower. Technical Field

[0002] The utility model relates to the technical field of agricultural machinery, in particular to a floating suspension type lawn mower. Background Art

[0003] As is well known, harvesting machinery plays an important role in agricultural machinery. There are many types of harvesting machinery, including lawn mowers and pole-shaped harvesters. Most of their operating principles rely on the harvester's blade performing a linear reciprocating motion to cut down the pole-shaped crops for subsequent processing. Existing lawn mowers are mostly gantry-type structures, which offer high strength but a large turning radius and awkward maneuverability. Furthermore, most lawn mowers lack contouring capabilities, making direct, hard contact with bumps and pits a common problem, resulting in blade deformation or damage. Common lawn mowers with contouring or floating functions are generally complex in structure, resulting in high manufacturing and maintenance costs. Furthermore, most existing lawn mowers lack running wheels and are typically secured to a tractor via a three-point suspension system. Therefore, the power required to operate the mower is high, placing high demands on the tractor's power. Furthermore, the three-point system is not very convenient to install, requiring at least two people to securely connect the mower to the tractor, making operation cumbersome. In addition, the angle adjustment of the cutter directly affects its adaptability. The cutter angle of common lawn mowers is usually fixed or the adjustment is cumbersome, which makes it less adaptable or difficult to adjust when harvesting fallen crops, resulting in a poor user experience. For example, the utility model patent with application number 202110977867.2, entitled "Self-propelled Rotary Wide-Width Mower Conditioner," and the utility model patent with application number 202221792296.1, entitled "Lawn Mower," both have the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a floating suspension lawn mower, in which the blade holder and the support arm are floatingly suspended and the blade holder can be retracted, the turning radius is small, the walking is flexible, the structure is simple, the tractor power requirement is low, the installation is convenient, the blade holder has small vibration, and the ground clearance is high.

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

[0006] A floating suspension lawn mower comprises a frame, with walking wheels on both sides of the frame, a connecting part for connecting to a tractor and a support arm that can rotate around the direction of travel of the frame, a fixed seat is provided at the far end of the support arm, a knife holder is provided on the fixed seat, and the knife holder is provided with a fixed knife and a movable knife, and the movable knife is connected to the drive system, and also includes a driving cylinder or a driving hydraulic cylinder and a vertical floating mechanism. The driving cylinder or the driving hydraulic cylinder is connected to the fixed seat and drives the support arm to rotate around the frame by driving the fixed seat; the vertical floating mechanism includes a first elastic component, a first rotating support seat and a first floating rod arranged basically vertically, one end of the first floating rod is connected to the support arm, and the other end of the first floating rod passes through the first rotating support seat and the first elastic component and is provided with a first limit, the first elastic component stores energy and rests on the first rotating support seat, when the support arm rotates from bottom to top, the first floating rod moves upward in the first rotating support seat while causing the first elastic component to release energy, and when the support arm rotates from top to bottom, the first floating rod moves downward in the first rotating support seat while causing the first elastic component to store energy.

[0007] Preferably, it also includes a transverse floating mechanism, which includes a second elastic component, a second universal support seat and a second floating rod, one end of the second floating rod is connected to the support arm, and the other end of the second floating rod passes through the second elastic component and the second universal support seat and is provided with a second limit, the second elastic component stores energy and rests on the second universal support seat, and the second floating rod can rotate with the support arm in a vertical plane that is basically consistent with the walking direction of the frame.

[0008] Preferably, the first floating rod is movably connected to the support arm; the second floating rod is movably connected to the support arm.

[0009] Preferably, the drive system includes a power input shaft, a transmission mechanism and an eccentric connecting rod mechanism arranged on the frame and connected to the power output shaft of an external tractor. The power input shaft is connected to the eccentric connecting rod mechanism via the transmission mechanism. The eccentric connecting rod mechanism is arranged on the fixed seat and the eccentric connecting rod mechanism is connected to the movable knife; the power input shaft drives the movable knife to perform reciprocating motion through the transmission mechanism and the eccentric connecting rod mechanism.

[0010] Preferably, the fixing seat is hinged to the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder. The fixing seat can rotate around the axis and drive the tool holder to rotate around the axis under the drive of the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder.

[0011] Preferably, a limiting portion is provided on the support arm, and when the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder contracts to drive the fixed seat and the tool holder to rotate toward the side near the frame body until the tool holder approaches a vertical state, the fixed seat presses against the limiting portion, and the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to contract to drive the support arm to rotate upward.

[0012] Preferably, the first elastic component and the second elastic component are both return springs, and the first limiter and the second limiter are both limit nuts.

[0013] Preferably, the end of the driving cylinder remote cylinder rod or the driving hydraulic cylinder remote hydraulic cylinder rod is hinged on the frame, and a rotating shaft is provided on both sides of the first rotating support seat, and the rotating shaft can be rotatably fixed on the frame. A first limiting hole for the first floating rod to pass radially is provided on the first rotating support seat, and the first floating rod can drive the first rotating support seat to rotate through the first limiting hole and the first floating rod can slide along the first limiting hole.

[0014] Preferably, a spherical joint is provided on the second universal support seat, a second limiting hole is provided on the spherical joint for the second floating rod to pass through, a long hole is provided on the support arm, and the end of the second floating rod is hinged on the long hole; the connecting part is a fixed ring, and the frame is connected to the external tractor through the fixed ring; the support arm is hinged to the connecting seat, and a long arc-shaped hole is provided on the connecting seat or the frame, and the connecting seat is threadedly connected to the frame through the long arc-shaped hole; the hinge point of the support arm and the connecting seat is higher than the fixed ring.

[0015] Preferably, the transmission mechanism is a belt drive, and the eccentric connecting rod mechanism includes an eccentric shaft, a connecting rod and a rocker arm. An eccentric shaft through hole is provided on the fixed seat, and the small shaft end of the eccentric shaft passes through the eccentric shaft through the hole and is rotatably connected to the transmission mechanism. The large shaft end of the eccentric shaft cooperates with the end cover through a first bearing, and the large shaft end of the eccentric shaft is provided with an eccentric shaft end that cooperates with the connecting rod; the eccentric shaft end is hingedly connected to one end of the connecting rod through a second bearing, and the other end of the connecting rod is hingedly connected to the rocker arm; the upper end of the rocker arm is hingedly connected to the fixed seat through a third bearing, and the lower end of the rocker arm is provided with a movable knife mounting hole, and the movable knife is mounted on the movable knife mounting hole.

[0016] In the above technical solution, a first elastic component is provided to store energy and rest against the first rotating support seat, and the first floating rod passes through the first elastic component and the first rotating support seat and rotates with the support arm to realize vertical floating of the support arm and the tool holder, so that when the support arm rotates from bottom to top, the first floating rod tends to move upward, driving the first rotating support seat to rotate with it while stretching the elastic component. When the support arm rotates from top to bottom, the first floating rod tends to move downward, driving the first rotating support seat to rotate with it while compressing the elastic component, thereby realizing the contour-like vertical suspension of the tool holder and the support arm and playing an auxiliary supporting role for the support arm. In this way, when facing a raised obstacle, the tool holder and the support arm tend to lift upward, reducing deformation or damage to the support arm, tool holder, fixed knife and movable knife. By setting up a transverse floating mechanism, it can adapt to the up and down floating of the support arm while providing further auxiliary support to the support arm, preventing the far end of the support arm from being deformed too much, and realizing single-arm suspension of the support arm instead of the previous gate structure. The limiting component combined with the support arm causes the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder to contract and drive the fixed seat and the tool holder to rotate toward the side near the frame body until the tool holder approaches the vertical state. The fixed seat presses against the limiting component to form a whole with the tool holder and the fixed seat. In this way, the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to contract to drive the support arm to rotate upward, thereby realizing the folding of the tool holder, further reducing the turning radius, and making walking more flexible. By arranging running wheels on both sides of the frame, the frame is further supported. The rolling friction of the running wheels and the support for the frame further reduce the power demand of the tractor. Only the fixing ring is hung on the tractor, and the power output shaft of the external tractor is plugged into the power input shaft, so that the floating suspension mower can be installed on the tractor. The installation is extremely convenient, and the hinge point between the support arm and the frame is higher than the fixing ring, the ground clearance is high, and the ability to pass through obstacles or uneven ground is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the floating suspension lawn mower (schematic diagram of the operating state);

[0018] Figure 2 This is a schematic diagram of the floating suspension lawn mower (with the blade holder retracted);

[0019] Figure 3 This is a schematic diagram of the exploded state of the vertical floating mechanism;

[0020] Figure 4 This is a schematic diagram of the exploded state of the lateral floating mechanism;

[0021] Figure 5 Schematic diagram of the eccentric connecting rod mechanism;

[0022] Figure 6 Schematic diagram of the eccentric connecting rod mechanism (excluding the rocker arm and the connecting rod rocker arm hinge shaft);

[0023] Figure 7 It is a schematic diagram of the rear view structure of the connecting seat. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1 to 7As shown, the floating suspension lawn mower includes a frame body 1 with a frame structure, a support arm 2 that can rotate around the direction consistent with the moving direction of the frame, a driving cylinder 3 or a driving hydraulic cylinder and a vertical floating mechanism 4 are provided on the frame body 1, a knife holder 5 is provided on the support arm 2, and a fixed knife and a movable knife are provided on the knife holder 5. The frame body 1 is connected to an external tractor, and a power input shaft 11 connected to the power output shaft of the external tractor is provided on the frame body 1. The power input shaft 11 is connected to the eccentric connecting rod mechanism 9 or the crank slider mechanism through a transmission mechanism, and the eccentric connecting rod mechanism is connected to the movable knife. In this way, the power input shaft 11 drives the movable knife to do reciprocating motion through the transmission mechanism and the eccentric connecting rod mechanism to achieve mowing. The end of the remote cylinder rod 31 of the above-mentioned driving cylinder 3 or the remote hydraulic cylinder rod of the driving hydraulic cylinder is hinged on the frame body 1, and the other end is connected to the support arm 2 and can drive the support arm 2 to rotate around the frame body 1, so that the support arm 2 rises or falls, thereby adjusting the height of the tool holder 5; the above-mentioned vertical floating mechanism 4 includes a first elastic component 41 basically vertically arranged, a first rotating support seat 42 and a first floating rod 43 movably connected to the support arm 2, wherein the first elastic component 4 preferably stores energy in a reset spring and rests on the first rotating support seat 42, and the first floating rod 43 passes through the first elastic component 41, the first rotating support seat 42 and rotates with the support arm 2. Specifically, axles 44 can be provided on both sides of the first rotating support base 42, and the rotating shafts 44 can be rotatably fixed to the frame body 1. The first rotating support base 42 is provided with a first limiting hole 45 for the first floating rod 43 to radially pass through. In this way, the first floating rod 43 passes through the first elastic component 41, radially passes through the first limiting hole 45, and then is movably connected to the support arm 2. The first floating rod 43 can be movably connected to the support arm 2 by two mutually perpendicular hinges or by directly connecting to the support arm 2 in a universal connection. In this way, the first floating rod 43 drives the first rotating support base 42 to rotate through the first limiting hole 45 and achieves sliding along the first limiting hole 45. When the support arm or blade holder encounters an obstacle, the support arm 2 tends to rotate upward, and the first floating rod 43 moves upward, driving the first rotating support seat 42 to rotate with it, while also stretching or extending the elastic member 41. When the support arm or blade holder encounters a pit, the support arm 2 tends to rotate downward, and the first floating rod 43 moves downward, driving the first rotating support seat 42 to rotate with it, while also compressing the elastic member 41. This allows the blade holder 5 and support arm 2 to vertically levitate, while the vertical floating mechanism 4 provides auxiliary support for the support arm. This allows the blade holder and support arm to lift upward when encountering a raised obstacle, preventing the support arm, blade holder, fixed blade, and movable blade from hard contact with the raised obstacle, thereby minimizing deformation or damage to the support arm, blade holder, fixed blade, and movable blade. In this embodiment, the floating suspension mower further includes a travel mechanism 6, which includes wheels 61 disposed on both sides of the frame 1. The wheels 61 further support the frame 1, and the rolling friction and support provided by the wheels further reduce the power required by the external tractor.In one embodiment, the floating suspension lawn mower also includes a lateral floating mechanism 7, which includes a second elastic component 71, a second universal support seat 72 and a second floating rod 73 movably connected to the support arm 2. The second elastic component 71 preferably stores energy in a reset spring and rests on the second universal support seat 72. The second floating rod 73 passes through the second elastic component 71 and the second universal support seat 72 and rotates with the support arm 2 in a vertical plane that is basically consistent with the walking direction of the frame 1. The second floating rod 73 is movably connected to the support arm 2 in a universal direction. In this way, the up and down rotation of the support arm 2 drives the second floating rod 73 to rotate with it, and then under the action of the second universal support seat 72, the second elastic component 71 is compressed or stretched, which adapts to the up and down floating of the support arm while further assisting the support arm to prevent excessive deformation of the far end of the support arm, thereby realizing single-arm suspension of the support arm, rather than the previous gate structure. Specifically, a spherical hinge 74 can be provided on the second universal support seat 72. A second limiting hole 75 is provided on the spherical hinge 74 for the second floating rod 73 to pass through. A long hole 76 is provided on the support arm 2 to support the second floating rod 73. The end of the second floating rod 73 is hinged to the long hole 76, allowing the second floating rod 73 to slide along the long hole 76 to accommodate the up and down movement of the support arm. Spring limiters 77 are provided at the distal ends of the first and second elastic components and the support arm, respectively. These can be threadedly secured to the distal ends of the first and second floating rods 43 and 73 using nuts, acting as spring limiters 74 to facilitate adjustment of the floating amount and elasticity of the vertical floating mechanism 4 and the horizontal floating mechanism 7.

[0026] In a preferred embodiment, a fixed seat 8 is provided at the distal end of the support arm 2, and an eccentric connecting rod mechanism 9 is disposed on the fixed seat 8. The fixed seat 8 is hingedly connected to the cylinder rod 31 of the driving cylinder 3 or the hydraulic cylinder rod of the driving hydraulic cylinder. The fixed seat 8 is driven by the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder to rotate about its axis, thereby driving the tool holder to rotate about its axis, so that the tool holder retracts from a near-horizontal position to a near-vertical position. Furthermore, a limiting component (not shown in the accompanying drawings) is provided on the support arm 2. When the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder contracts and drives the fixed seat and the tool holder to rotate toward the proximal end of the support arm until the tool holder approaches a vertical position, the fixed seat 8 abuts against the limiting component, and the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to contract, driving the support arm 2 to rotate upward, thereby lifting the fixed seat 8 and the tool holder upward. The limiting component may include a fixed stop (not shown in the accompanying drawings) disposed at the distal end of the support arm 2, and a fixing pin (not shown in the accompanying drawings) corresponding to the fixed stop provided on the fixing seat 8. The cylinder rod of the driving cylinder or the hydraulic rod of the driving hydraulic cylinder contracts, driving the fixing seat and the tool holder to rotate toward the proximal side of the frame body, thereby driving the fixing pin to rotate until the fixing pin is engaged with the fixed stop, thereby integrating the tool holder and the fixing seat. The cylinder rod of the driving cylinder or the hydraulic rod of the driving hydraulic cylinder then continues to contract, driving the support arm to rotate upward, thereby retracting the tool holder, further reducing the turning radius and making walking more convenient. This structure is widely used in wall-mounted hanging clamps for mops and brooms, and will not be described in detail here. Similarly, the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder is extended to drive the fixing pin out of the fixed position, and the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to extend to drive the fixing seat and the knife holder to rotate toward the side of the remote frame body, so as to realize the deployment of the knife holder, and the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to extend to drive the fixing seat and the knife holder to continue to rotate toward the side of the remote frame body, so as to realize the harvesting of crops in the groove; or a fixing pin is provided at the far end of the support arm, and a fixed position corresponding to the fixing pin is provided on the fixing seat, and the cylinder rod of the driving cylinder or The hydraulic cylinder rod of the driving hydraulic cylinder contracts to drive the fixed seat and the tool holder to rotate toward the near frame body side, and then drives the fixed pin to rotate until the fixed pin is inserted in the fixed position, so that the tool holder and the fixed seat are integrated. The cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to contract to drive the support arm to rotate upward, thereby retracting the tool holder; the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder extends to drive the fixing pin out of the fixed position, and the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to extend to drive the fixed seat and the tool holder to rotate toward the far frame body side.

[0027] In a preferred embodiment, a curved slide 81 is also provided on the fixed base 8 to support the tool holder. This allows the cylinder rod of the pneumatic cylinder or the hydraulic cylinder to retract and rotate the fixed base, thereby driving the curved slide and the tool holder. The first and second floating rods are preferably universally hinged in the middle of the support arm or near the tool holder to prevent excessive floating of the first and second floating rods, which could cause excessive vibration during operation, or insufficient floating of the first and second floating rods, which would render them ineffective in floating and supporting the machine.

[0028] In a preferred embodiment, the support arm 2 is hinged to the frame 1, allowing the support arm 2 to rotate about the frame's direction of travel. A fixed ring 12 is hinged to the frame 1, and the frame is connected to an external tractor via the fixed ring 12. This allows the floating suspension mower to be installed on the tractor simply by connecting the fixed ring 12 to the tractor and then plugging the external tractor's power output shaft into the power input shaft 11. Installation is extremely convenient, and due to the support of the running wheels, the process of supporting the floating suspension mower is eliminated, allowing one person to easily install it. Furthermore, the hinge point between the support arm 2 and the frame is higher than the fixed ring 12, further increasing the ground clearance to 12cm-18cm, further improving the ability to pass over obstacles or uneven surfaces.

[0029] In a preferred embodiment, the support arm 2 is fixed to the frame 1 through a threaded connection with the connecting seat 21. The support arm 2 is hinged to the connecting seat 21. A long arc-shaped hole 22 is provided on the connecting seat 21 or the frame 1. The connecting seat 21 is threadedly connected to the frame 1 through the long arc-shaped hole 22. The connecting seat rotates around the long arc-shaped hole 22, and the support arm rotates accordingly. The angles of the knife holder 5, the fixed knife and the movable knife and the crops to be cut are adjusted accordingly, thereby realizing the harvesting of fallen crops.

[0030] In a preferred embodiment, the transmission mechanism is a belt transmission 91, and the above-mentioned eccentric connecting rod mechanism includes an eccentric shaft 82, a connecting rod 83 and a rocker arm 84. An eccentric shaft through hole is provided on the fixed seat 8, and the small shaft end of the eccentric shaft passes through the eccentric shaft through hole and is rotatably connected to the transmission mechanism. The large shaft end of the eccentric shaft cooperates with the end cover 85 through a first bearing, and the large shaft end of the eccentric shaft is provided with an eccentric shaft end 86 that cooperates with the connecting rod, and the center of the eccentric shaft end is the first axis; the eccentric shaft end is hingedly connected to one end of the connecting rod 83 through a second bearing, and the other end of the connecting rod is hingedly connected to the middle and lower part of the rocker arm 84 through a connecting rod rocker arm hinge shaft 87 The connecting rod and rocker arm are connected, with the hinge center of the connecting rod and rocker arm being the second axis. The upper end of the rocker arm is hingedly connected to the upper end rocker arm hinge shaft 88 provided at the upper end of the fixed base via a third bearing. The hinge center of the upper end of the rocker arm is the third axis. The lower end of the rocker arm is provided with a tool holder mounting hole 89, on which the tool holder is mounted. The first center distance is from the first axis to the second axis, the second center distance is from the first axis to the third axis, and the third center distance is from the second axis to the third axis. The ratio of the second center distance to the first center distance ranges from 1.7 to 1.9, and the ratio of the third center distance to the first center distance ranges from 1.75 to 1.85. The first center distance is 110.00 to 120.00 mm, the second center distance is 213.00 to 217.00 mm, and the third center distance is 205.00 to 210.00 mm. The other end of the connecting rod is hingedly connected to the lower middle portion of the rocker arm, replacing the original hinge structure where the other end of the connecting rod is connected to the middle portion of the rocker arm. The rocker arm is a V-shaped structure. While meeting the requirements of the reciprocating motion of the moving blade, the rocker arm size is designed to be minimized, thereby achieving the smallest size design for the entire machine, thereby minimizing the vibration of the entire machine, improving work efficiency by increasing the belt drive speed, and extending the service life of components, making it easier to promote and apply in the market. This part of the structure can directly adopt an eccentric rocker arm reciprocating lawn mower drive device disclosed in application number CN202221434204.2, or it can adopt the corresponding structure of a tractor-mounted reciprocating lawn mower disclosed in patent number ZL201920198625.1, so it will not be described in detail here.

[0031] In the above technical solution, the floating-hung lawn mower can be installed on the tractor by hooking the fixing ring 12 to the tractor and then plugging the external tractor's power output shaft into the power input shaft 11, making installation extremely convenient. When the floating-hung lawn mower needs to move (when not mowing) or to circumvent a large obstacle, the cylinder rod of the driving cylinder or the hydraulic cylinder retracts, driving the fixing seat and the blade carrier to rotate toward the near-frame side. This in turn drives the fixing pin to rotate until the fixing pin engages in the fixed position, integrating the blade carrier and the fixing seat. The cylinder rod of the driving cylinder or the hydraulic cylinder further retracts, driving the support arm to rotate upward, retracting the blade carrier, further reducing the turning radius and making travel more flexible. When mowing is required, the cylinder rod of the driving cylinder or the hydraulic cylinder extends, driving the fixing pin out of the fixed position. The cylinder rod of the driving cylinder or the hydraulic cylinder further extends, driving the fixing seat and the blade carrier to rotate toward the far-frame side, deploying the blade carrier. When the support arm or tool holder encounters an obstacle, the support arm 2 tends to rotate upward, and the first floating rod 43 moves upward, driving the first rotating support seat 42 to rotate with it, while stretching the elastic component 41. When the support arm or tool holder encounters a pit, the support arm 2 tends to rotate downward, and the first floating rod 43 moves downward, driving the first rotating support seat 42 to rotate with it, while compressing the elastic component 41. This achieves contoured vertical suspension of the tool holder 5 and support arm 2, while the vertical floating mechanism 4 provides auxiliary support for the support arm. The up and down rotation of the support arm 2 drives the second floating rod 73 to rotate with it, which in turn, under the action of the second universal support seat 72, compresses or stretches the second elastic component 71, adapting to the up and down floating of the support arm while providing further auxiliary support for the support arm and preventing excessive deformation of the distal end of the support arm. The cylinder rod of the driving cylinder or the hydraulic cylinder continues to extend, driving the fixed seat and tool holder to continue rotating toward the distal end of the frame, achieving harvesting of crops in the groove.

[0032] This embodiment is only an illustration of the concept and implementation of the utility model, and does not limit it. Under the concept of the utility model, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A floating suspension lawn mower, comprising a frame, with travel wheels on both sides of the frame, a connection portion for connecting to a tractor and a support arm rotatable around the direction of travel of the frame, a fixed seat at the distal end of the support arm, a blade holder on the fixed seat, a fixed blade and a movable blade on the blade holder, the movable blade being connected to a drive system, characterized in that: It also includes a driving cylinder or a driving hydraulic cylinder and a vertical floating mechanism, wherein the driving cylinder or the driving hydraulic cylinder is connected to the fixed seat and drives the support arm to rotate around the frame body by driving the fixed seat; the vertical floating mechanism includes a first elastic component, a first rotating support seat and a first floating rod arranged basically vertically, one end of the first floating rod is connected to the support arm, the other end of the first floating rod passes through the first rotating support seat and the first elastic component and is provided with a first limit, the first elastic component stores energy and rests on the first rotating support seat, when the support arm rotates from bottom to top, the first floating rod moves upward in the first rotating support seat and the first elastic component releases energy at the same time, when the support arm rotates from top to bottom, the first floating rod moves downward in the first rotating support seat and the first elastic component stores energy.

2. The floating suspension lawn mower according to claim 1, characterized in that: It also includes a transverse floating mechanism, which includes a second elastic component, a second universal support seat and a second floating rod. One end of the second floating rod is connected to the support arm, and the other end of the second floating rod passes through the second elastic component and the second universal support seat and is provided with a second limit. The second elastic component stores energy and rests on the second universal support seat. The second floating rod can rotate with the support arm in a vertical plane that is basically consistent with the walking direction of the frame.

3. The floating suspension lawn mower according to claim 2, characterized in that: The first floating rod is movably connected to the support arm; the second floating rod is movably connected to the support arm.

4. The floating suspension lawn mower according to any one of claims 1 to 3, characterized in that: The drive system includes a power input shaft, a transmission mechanism and an eccentric connecting rod mechanism arranged on the frame and connected to the power output shaft of an external tractor. The power input shaft is connected to the eccentric connecting rod mechanism via the transmission mechanism. The eccentric connecting rod mechanism is arranged on the fixed seat and is connected to the movable knife. The power input shaft drives the movable knife to perform reciprocating motion through the transmission mechanism and the eccentric connecting rod mechanism.

5. The floating suspension lawn mower according to any one of claims 1 to 3, characterized in that: The fixing seat is hinged to the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder. The fixing seat can rotate around the axis and drive the tool holder to rotate around the axis under the drive of the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder.

6. The floating suspension lawn mower according to claim 1, characterized in that: A limiting portion is provided on the support arm. When the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder contracts to drive the fixed seat and the tool holder to rotate toward the side near the frame body until the tool holder approaches a vertical state, the fixed seat abuts against the limiting portion, and the cylinder rod of the driving cylinder or the hydraulic cylinder rod of the driving hydraulic cylinder continues to contract to drive the support arm to rotate upward.

7. The floating suspension lawn mower according to claim 2, characterized in that: The first elastic component and the second elastic component are both return springs, and the first limiter and the second limiter are both limit nuts.

8. The floating suspension lawn mower according to claim 1 or 2, characterized in that: The ends of the driving cylinder remote cylinder rod or the driving hydraulic cylinder remote hydraulic cylinder rod are hinged on the frame body, and rotating shafts are provided on both sides of the first rotating support seat, and the rotating shafts can be rotatably fixed on the frame body. A first limiting hole for the first floating rod to pass radially is provided on the first rotating support seat, and the first floating rod can drive the first rotating support seat to rotate through the first limiting hole and the first floating rod can slide along the first limiting hole.

9. The floating suspension lawn mower according to claim 2, characterized in that: A spherical joint is provided on the second universal support seat, and a second limiting hole for the second floating rod to pass through is provided on the spherical joint. A long hole is provided on the support arm, and the end of the second floating rod is hinged on the long hole; the connecting part is a fixed ring, and the frame is connected to the external tractor through the fixed ring; the support arm is hinged to the connecting seat, and a long arc hole is provided on the connecting seat or the frame, and the connecting seat is threadedly connected to the frame through the long arc hole; the hinge point of the support arm and the connecting seat is higher than the fixed ring.

10. The floating suspension lawn mower according to claim 4, characterized in that The transmission mechanism is a belt drive, and the eccentric connecting rod mechanism includes an eccentric shaft, a connecting rod and a rocker arm. An eccentric shaft through hole is provided on the fixed seat, and the small shaft end of the eccentric shaft passes through the eccentric shaft through the hole and is rotatably connected to the transmission mechanism. The large shaft end of the eccentric shaft cooperates with the end cover through a first bearing, and the large shaft end of the eccentric shaft is provided with an eccentric shaft end that cooperates with the connecting rod; the eccentric shaft end is hingedly connected to one end of the connecting rod through a second bearing, and the other end of the connecting rod is hingedly connected to the rocker arm; the upper end of the rocker arm is hingedly connected to the fixed seat through a third bearing, and the lower end of the rocker arm is provided with a movable knife mounting hole, and the movable knife is mounted on the movable knife mounting hole.

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