A lawnmower incorporating a hydraulic motor

Abstract

This utility model belongs to the field of lawnmowers, specifically a lawnmower with a built-in hydraulic motor. It addresses the problems of existing hydraulic lawnmowers, such as complex casings, numerous welding points leading to welding stress and deformation, direct motor-driven grass-chopping mechanism impacts on the motor, and the lack of a belt tensioner requiring belt replacement. The proposed solution includes a boom, hydraulic lines, a built-in hydraulic motor, and a connector. This utility model reduces casing deformation caused by welding, allows the blades to move centrifugally for grass cutting and branch chopping, avoids the reaction force from the direct motor-driven grass-chopping mechanism, and allows for belt tension adjustment, improving transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lawnmower technology, and in particular to a lawnmower with a built-in hydraulic motor. Background Technology

[0002] Built-in hydraulic motor lawnmowers are a type of high-efficiency lawn maintenance equipment that uses a hydraulic transmission system. They integrate the hydraulic motor directly inside the lawnmower and drive the blades to rotate through the hydraulic system to achieve the lawn mowing function. These lawnmowers are typically used for commercial lawn maintenance, golf courses, parks and other large-area lawn mowing work.

[0003] Most existing lawnmowers have the following problems:

[0004] Because the existing hydraulic lawnmower chassis is complex and requires too many welding points, the welding stress generated during the welding process can cause the chassis to deform.

[0005] The connection method of directly driving the straw-chopping device with a hydraulic motor will cause the hydraulic motor to be directly impacted by the reaction force of the blades during operation, which will reduce the service life of the hydraulic motor.

[0006] The device does not have a belt tensioning device. After the machine has been used for a certain period of time, the belt will stretch and need to be replaced.

[0007] To address the aforementioned problems, this utility model document proposes a lawnmower with a built-in hydraulic motor. Utility Model Content

[0008] This utility model provides a lawnmower with a built-in hydraulic motor, which solves the problems of existing hydraulic lawnmowers. These problems include: the complex chassis of existing hydraulic lawnmowers, the numerous welding points requiring welding, which can cause deformation of the chassis due to welding stress; the direct connection between the hydraulic motor and the grass-chopping device, which exposes the hydraulic motor to the impact of the blades' reaction force, reducing its lifespan; and the lack of a belt tensioning device, which causes the belt to stretch and need replacement after a certain period of use.

[0009] This utility model provides the following technical solution:

[0010] A lawnmower with a built-in hydraulic motor includes: an excavator arm, hydraulic oil pipes, a lawnmower with a built-in hydraulic motor, and a connector. The connector is located at one end of the excavator arm. The lawnmower with a built-in hydraulic motor includes a hydraulic drive system, a housing, a belt tensioning device, a grass-chopping device, and a splash guard chain.

[0011] The hydraulic oil pipe is fixedly installed on the outside of the excavator arm and is used to transmit hydraulic power to the built-in hydraulic motor lawnmower. The built-in hydraulic motor lawnmower is set at one end of the excavator arm. The hydraulic drive system is set on the top of the machine box. The grass shredder is set inside the machine box. The belt tensioning device is set on one side of the machine box. Multiple anti-splash chains are fixedly installed on one side of the machine box by bolts to prevent grass and branches from flying everywhere during the mowing process.

[0012] In one possible design, the connector includes a first bushing, a second bushing, an ear plate, a back plate, pins, and an ear seat plate. The two first bushings and the two second bushings are respectively fixedly installed on one side of the two ear plates. The two pins are rotatably connected between the two ear plates through the first bushings and the second bushings. The back plate is welded to the top side of the ear seat plate, and the ear seat plate is welded to the bottom side of the two ear plates. The ear seat plate is fixedly installed to the top side of the chassis by multiple bolts.

[0013] In one possible design, the chassis includes a top cover, side covers, reinforcing ribs, a left upright plate, lifting lugs, a middle partition, a front bent plate, a rear bent plate, a one-way hydraulic valve mounting plate, a connector mounting plate, and a right upright plate. The middle partition is welded between the left and right upright plates. The front and rear bent plates are respectively bolted to the sides of the left and right upright plates. The top cover, one-way hydraulic valve mounting plate, and connector mounting plate are all bolted to the top sides of the front and rear bent plates. The connector mounting plate is used for mounting and fixing connectors. The side covers are screwed to one side of the front and rear bent plates. Multiple waist-shaped ventilation holes are provided on one side of the side covers. Multiple reinforcing ribs are welded to the sides of the left and right upright plates. Two lifting lugs are welded to the top sides of the front and rear bent plates.

[0014] In one possible design, the hydraulic drive system includes a first hydraulic check valve, a pressure relief pipe, a second hydraulic check valve, a hydraulic motor pipe, a hydraulic motor, a first lubricating oil hose, a coupling, a drive pulley, a stop nut, a first bearing, and a splined shaft. The first hydraulic check valve is bolted to the top side of the check valve mounting plate. The first hydraulic check valve is connected to one end of the hydraulic pipe. One end of the pressure relief pipe is connected to the top of the first hydraulic check valve, and the other end is connected to the hydraulic motor. The second hydraulic check valve is located on the outer wall of the pressure relief pipe. One end of each of the two hydraulic motor pipes is connected to one side of the first hydraulic check valve, and the other end is connected to the hydraulic motor. The hydraulic motor is bolted to the top of the intermediate partition.

[0015] In one possible design, the output end of the hydraulic motor is fixedly connected to one end of the splined shaft, the coupling is fixedly mounted on the outer wall of the output end of the hydraulic motor, the splined shaft is rotatably connected to the inner wall of the coupling via two first bearings, the first lubricating oil hose is connected to the outer wall of the coupling for lubricating and maintaining the two first bearings, the drive pulley is inserted into the outer wall of the splined shaft, and the stop nut is threadedly connected to the outer wall of the other end of the matching splined shaft for limiting and fixing the drive pulley.

[0016] In one possible design, the grass-chopping device includes a first bearing seat, a blade fixing shaft, a blade holder, a blade body, a main shaft, a second bearing seat, a driven pulley, a second lubricating oil hose, a belt, a second connecting shaft, a second bearing, a bearing pin fixing plate, a third connecting shaft, and a first through-type pressure injection cup. The first and second bearing seats are respectively fixedly installed on one side of the right and left upright plates. The second and third connecting shafts are respectively limited and fixed to both ends of the main shaft by the bearing pin fixing plate. The second and third connecting shafts are rotatably connected to the inside of the first and second bearing seats through the second bearings. The second lubricating oil hose and the first through-type pressure injection cup are respectively connected to the first and second bearing seats for lubricating and maintaining the two second bearings. The driven pulley is fixedly installed on the outer wall of the second connecting shaft. The belt is sleeved on the driving pulley and the driven pulley for driving the main shaft to rotate. Multiple blade holders are welded to the outer wall of the main shaft. Each blade body is rotatably connected between the blade holders through the blade fixing shaft to achieve the grass-cutting effect.

[0017] In one possible design, the belt tensioning device includes a compression spring, an adjusting screw, a device fixing shaft, a second straight-through pressure injection cup, a bearing fixing shaft, a third bearing, an adjusting wheel, and a connecting plate. The device fixing shaft is fixedly installed on one side of the left upright plate. The connecting plate is welded to the outer wall of the device fixing shaft. The bearing fixing shaft is welded to one side of the connecting plate. The adjusting wheel is rotatably connected to the outer wall of the bearing fixing shaft via the third bearing for adjusting belt tension. The second straight-through pressure injection cup is located at one end of the bearing fixing shaft for lubricating and maintaining the third bearing. The device fixing shaft is fixedly installed on one side of the connecting plate by bolts and nuts. The compression spring is sleeved on the outer wall of the device fixing shaft to facilitate adjustment of the position of the adjusting wheel, thereby adjusting the belt tension and improving belt transmission efficiency.

[0018] In this application, during use, the excavator arm first transmits hydraulic power to the lawnmower through hydraulic oil pipes. The hydraulic oil pipes are fixed to the outside of the excavator arm and connected to the hydraulic drive system of the lawnmower with a built-in hydraulic motor. Then, the lawnmower with the built-in hydraulic motor drives the lawnmower to work through the hydraulic oil pipes, the excavator arm and the excavator hydraulic system, which improves the utilization efficiency of idle excavators. When the excavator provides hydraulic power, the hydraulic oil flows into the first hydraulic check valve through the hydraulic oil pipes to ensure that the hydraulic oil can only flow in one direction, providing a stable power input to the hydraulic motor. The pressure relief oil pipe is connected to the hydraulic motor and is used to release the system pressure when necessary to ensure system safety. The second hydraulic check valve is set on the pressure relief oil pipe to further control the system pressure and prevent the hydraulic oil from flowing back.

[0019] The hydraulic motor receives hydraulic oil through a hydraulic motor oil pipe and converts it into rotational mechanical energy. The output end of the hydraulic motor is connected to a splined shaft, which is supported and transmits power through a coupling and a first bearing. When the hydraulic motor rotates, the splined shaft drives the drive pulley to rotate. A locking nut ensures the pulley is axially fixed. The first lubricating oil hose provides lubrication to the first bearing, ensuring smooth rotation. The drive pulley is fixed to the splined shaft and rotates with the hydraulic motor. A belt is fitted on both the drive and driven pulleys, transmitting rotational power. Thus, the drive pulley drives the driven pulley via the belt, and the driven pulley is fixed to a second connecting shaft, which is mounted on the right side via a second bearing. The first bearing housing of the upright plate is conducive to improving stability. Due to the characteristics of the hydraulic motor, which adopts the piston type hydraulic motor, it has a large output torque and high volumetric efficiency, making it suitable for high-pressure and high-load working conditions. Moreover, the hydraulic system can operate stably under high-pressure and high-load conditions. The design and manufacturing process of the parts ensures that they are sturdy and durable, and can withstand greater pressure and impact, reducing the possibility of failure and improving reliability. Then, when the second connecting shaft drives the main shaft to rotate, it can drive the blade body to perform centrifugal motion to cut grass and shred branches. This avoids the reaction force caused by the hydraulic motor directly driving the grass shredder and improves the service life of the hydraulic motor.

[0020] Next, the adjusting wheel is rotatably connected to the bearing fixing shaft via a third bearing. A compression spring is sleeved on the device fixing shaft, providing elastic support for the adjusting wheel. By adjusting the adjusting screw, the compression amount of the spring can be changed, thereby adjusting the position of the adjusting wheel and thus the belt tension, improving belt transmission efficiency and avoiding the need to replace the belt after it stretches after a certain period of use, saving costs. Multiple anti-splash chains are fixed to one side of the chassis with bolts to prevent grass and branches from flying everywhere during mowing, ensuring operational safety. The chassis is made using a bending forming process, and the internal components... The section welding process further reduces the deformation of the chassis caused by welding. At the same time, the bent chassis structure is simple and can withstand much greater reaction forces than ordinary splicing and welding. Furthermore, relatively thin plates are selected without reducing the strength of the chassis, thereby reducing material costs and improving production efficiency. In addition, the components with bearings are equipped with a first lubricating oil hose, a second straight-through pressure oil cup, a second lubricating oil hose, and a first straight-through pressure oil cup, thereby avoiding reduced transmission efficiency and shorter service life of the bearings due to inadequate lubrication.

[0021] In this utility model, the lawnmower with a built-in hydraulic motor can drive the blade body to move in a centrifugal force through the grass-chopping device to perform the function of cutting grass and chopping branches. This avoids the reaction force caused by the hydraulic motor directly driving the grass-chopping device and improves the service life of the hydraulic motor.

[0022] In this utility model, the lawnmower with a built-in hydraulic motor can adjust the tension of the belt through a belt tensioning device, thereby improving the transmission efficiency of the belt and avoiding the need to replace the belt after it stretches out after a certain period of use, thus saving costs.

[0023] In this utility model, the lawnmower with a built-in hydraulic motor reduces the deformation of the chassis caused by welding through the designed chassis. At the same time, the reaction force borne by the chassis is much greater than that borne by ordinary splicing and welding, thereby reducing material costs and improving production efficiency.

[0024] In this invention, the deformation of the casing caused by welding is reduced, and the reaction force borne by the casing is much greater than that borne by ordinary splicing and welding. It can drive the blade body to make centrifugal motion to perform the function of cutting grass and chopping branches. It avoids the reaction force caused by the hydraulic motor directly driving the grass chopping device. It can also adjust the tension of the belt and improve the transmission efficiency of the belt. Attached Figure Description

[0025] Figure 1A front view structural diagram of a lawnmower with a built-in hydraulic motor provided for an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the chassis structure of a lawnmower with a built-in hydraulic motor provided for an embodiment of this utility model;

[0027] Figure 3 A cross-sectional view of the chassis of a lawnmower with a built-in hydraulic motor provided for an embodiment of this utility model;

[0028] Figure 4 A schematic diagram of one side of the chassis structure of a lawnmower with a built-in hydraulic motor provided for an embodiment of this utility model;

[0029] Figure 5 A schematic diagram of the disassembled chassis structure of a lawnmower with a built-in hydraulic motor, provided for an embodiment of this utility model;

[0030] Figure 6 A schematic diagram of the grass-chopping device of a lawnmower with a built-in hydraulic motor provided for an embodiment of this utility model;

[0031] Figure 7 A cross-sectional view of a grass-chopping device for a lawnmower with a built-in hydraulic motor, provided in an embodiment of this utility model.

[0032] Figure 8 A schematic diagram of the connector structure of a lawnmower with a built-in hydraulic motor provided for an embodiment of this utility model;

[0033] Figure 9 This is a schematic diagram of the belt tensioning device of a lawnmower with a built-in hydraulic motor, provided as an embodiment of the present invention.

[0034] Figure label:

[0035] 1. Excavator arm; 2. Hydraulic hoses; 3. Built-in hydraulic motor lawnmower; 4. Connector; 5. Hydraulic drive system; 6. Chassis; 7. Belt tensioner; 8. Grass shredder; 9. Anti-splash chain; 401. First bushing; 402. Second bushing; 403. Ear plate; 404. Back plate; 405. Pin; 406. Ear seat plate; 501. First hydraulic check valve; 502. Pressure relief hose; 503. Second hydraulic check valve; 504. Hydraulic motor hose; 505. Hydraulic motor; 506. First lubricating oil hose; 507. Coupling; 508. Drive pulley; 509. Locking nut; 510. First bearing; 511. Splined shaft; 601. Top cover plate; 602. Side cover plate; 603. Reinforcing rib plate; 604. Left upright plate; 605. Lifting lug; 606 607. Middle partition plate; 608. Front bending plate; 609. Rear bending plate; 610. One-way hydraulic valve mounting plate; 611. Connector mounting plate; 612. Right upright plate; 701. Compression spring; 702. Adjusting screw; 703. Device fixing shaft; 704. Second straight-through pressure injection cup; 705. Bearing fixing shaft; 706. Third bearing; 707. Adjusting wheel; 708. Connecting plate; 801. First bearing seat; 802. Blade fixing shaft; 803. Tool holder; 804. Blade body; 805. Main shaft; 806. Second bearing seat; 807. Driven pulley; 808. Second lubricating oil hose; 809. Belt; 810. Second connecting shaft; 811. Second bearing; 812. Bearing pin fixing plate; 813. Third connecting shaft; 814. First straight-through pressure injection cup. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0037] The existing lawnmower industry has several problems. Firstly, the complex chassis of current hydraulic lawnmowers, requiring numerous welds, can lead to deformation due to welding stress. Secondly, the direct connection between the hydraulic motor and the shredding device exposes the motor to the impact of the blades' reaction force, reducing its lifespan. Thirdly, the lack of a belt tensioner means the belt will stretch and need replacement after a certain period of use. To address these issues, this solution proposes a new lawnmower design.

[0038] Please refer to Figures 1-9A lawnmower includes: an excavator arm 1, a hydraulic oil pipe 2, a lawnmower with a built-in hydraulic motor 3, and a connector 4. The connector 4 is located at one end of the excavator arm 1. The lawnmower with a built-in hydraulic motor 3 includes a hydraulic drive system 5, a machine housing 6, a belt tensioning device 7, a grass shredding device 8, and a splash-proof chain 9.

[0039] Hydraulic hose 2 is fixedly installed on the outside of excavator arm 1 to transmit hydraulic power to the built-in hydraulic motor lawnmower 3. The built-in hydraulic motor lawnmower 3 is located at one end of excavator arm 1. Hydraulic drive system 5 is located on the top of machine housing 6. Grass shredder 8 is located inside machine housing 6. Excavator arm 1 transmits hydraulic power to lawnmower through hydraulic hose 2. Hydraulic hose 2 is fixed on the outside of excavator arm 1 and connected to the hydraulic drive system 5 of built-in hydraulic motor lawnmower 3. Thus, built-in hydraulic motor lawnmower 3 drives lawnmower through hydraulic hose 2, excavator arm 1, and excavator hydraulic system, improving the utilization efficiency of idle excavators. Belt tensioning device 7 is located on one side of machine housing 6. Multiple anti-splash chains 9 are fixedly installed on one side of machine housing 6 with bolts to prevent grass and branches from flying everywhere during mowing.

[0040] The chassis 6 includes a top cover 601, side cover 602, reinforcing rib 603, left upright plate 604, lifting lug 605, middle partition 606, front bending plate 607, rear bending plate 608, one-way hydraulic valve mounting plate 609, connector mounting plate 610, and right upright plate 611. The middle partition 606 is welded between the left upright plate 604 and the right upright plate 611. The front bending plate 607 and the rear bending plate 608 are respectively bolted to the sides of the left upright plate 604 and the right upright plate 611. The top cover 601, the one-way hydraulic valve mounting plate 609, and the connector mounting plate 610 are all bolted to the top sides of the front bending plate 607 and the rear bending plate 608. The connector mounting plate 610 is used for mounting and fixing the connector 4. Plate 602 is fixedly installed on one side of the front bending plate 607 and the rear bending plate 608 by screws. Multiple waist-shaped heat dissipation holes are opened on one side of the side cover plate 602. Multiple reinforcing ribs 603 are welded to both sides of the left upright plate 604 and the right upright plate 611. Two lifting lugs 605 are welded to the top side of the front bending plate 607 and the rear bending plate 608. The chassis 6 adopts a bending forming process. In addition, the chassis 6 adopts a segmented welding process inside the chassis 6 to further reduce the deformation of the chassis 6 caused by welding. At the same time, the bending forming chassis 6 has a simple structure and can withstand much greater reaction force than ordinary splicing and welding. Furthermore, relatively thin plates are selected without reducing the strength of the chassis 6, thereby reducing material costs and improving production efficiency.

[0041] The hydraulic drive system 5 includes a first hydraulic check valve 501, a pressure relief oil pipe 502, a second hydraulic check valve 503, a hydraulic motor oil pipe 504, a hydraulic motor 505, a first lubricating oil hose 506, a coupling 507, a drive pulley 508, a stop nut 509, a first bearing 510, and a splined shaft 511. The first hydraulic check valve 501 is bolted to the top side of the check hydraulic valve mounting plate 609. The first hydraulic check valve 501 is connected to one end of the hydraulic oil pipe 2. One end of the pressure relief oil pipe 502 is connected to the top of the first hydraulic check valve 501, and the other end is connected to the hydraulic motor 505. The second hydraulic check valve 503 is located on the outer wall of the pressure relief oil pipe 502. One end of each motor oil pipe 504 is connected to one side of the first hydraulic check valve 501, and the other end is connected to the hydraulic motor 505. The hydraulic motor 505 is fixedly installed on the top of the intermediate partition 606 by bolts. Hydraulic oil flows into the first hydraulic check valve 501 through the hydraulic oil pipe 2, ensuring that the hydraulic oil can only flow in one direction, providing a stable power input to the hydraulic motor 505. The pressure relief oil pipe 502 is connected to the hydraulic motor 505 and is used to release system pressure when necessary to ensure system safety. The second hydraulic check valve 503 is set on the pressure relief oil pipe 502 to further control system pressure and prevent hydraulic oil backflow. The hydraulic motor 505 receives hydraulic oil through the hydraulic motor oil pipe 504 and converts it into rotational mechanical energy.

[0042] The output end of the hydraulic motor 505 is fixedly connected to one end of the splined shaft 511. A coupling 507 is fixedly mounted on the outer wall of the output end of the hydraulic motor 505. The splined shaft 511 is rotatably connected to the inner wall of the coupling 507 via two first bearings 510. A first lubricating oil hose 506 connects to the outer wall of the coupling 507 for lubricating and maintaining the two first bearings 510. A drive pulley 508 is inserted into the outer wall of the splined shaft 511. A stop nut 509 is threaded onto the outer wall of the other end of the matching splined shaft 511 for limiting and fixing the drive pulley 508. The output end of the hydraulic motor 505 is connected to the spline shaft 511. The spline shaft 511 is supported and transmits power through the coupling 507 and the first bearing 510. When the hydraulic motor 505 rotates, the spline shaft 511 drives the drive pulley 508 to rotate. The stop nut 509 ensures that the pulley is axially fixed. The first lubricating oil hose 506 can provide lubrication for the first bearing 510 to ensure smooth rotation. The drive pulley 508 is fixed on the spline shaft 511 and rotates with the hydraulic motor 505. The belt 809 is sleeved on the drive pulley 508 and the driven pulley 807 and transmits rotational power.

[0043] The grass-chopping device 8 includes a first bearing seat 801, a blade fixing shaft 802, a blade holder 803, a blade body 804, a main shaft 805, a second bearing seat 806, a driven pulley 807, a second lubricating oil hose 808, a belt 809, a second connecting shaft 810, a second bearing 811, a bearing pin fixing plate 812, a third connecting shaft 813, and a first straight-through pressure injection cup 814. The first bearing seat 801 and the second bearing seat 806 are respectively fixedly installed on one side of the right vertical plate 611 and the left vertical plate 604. The second connecting shaft 810 and the third connecting shaft 813 are respectively fixed to both ends of the main shaft 805 by the bearing pin fixing plate 812. 13 are rotatably connected to the interior of the first bearing seat 801 and the second bearing seat 806 respectively via the second bearing 811. The second lubricating oil hose 808 and the first straight-through pressure injection cup 814 are respectively connected to the first bearing seat 801 and the second bearing seat 806 for lubricating and maintaining the two second bearings 811. The driven pulley 807 is fixedly installed on the outer wall of the second connecting shaft 810. The belt 809 is sleeved on the driving pulley 508 and the driven pulley 807 for driving the main shaft 805 to rotate. Multiple blade holders 803 are welded to the outer wall of the main shaft 805. Each blade body 804 is rotatably connected between the blade holders 803 via the blade fixing shaft 802 for achieving the grass cutting effect.

[0044] The driving pulley 508 drives the driven pulley 807 via the belt 809. The driven pulley 807 is fixed to the second connecting shaft 810, which is mounted in the first bearing seat 801 of the right vertical plate 611 via the second bearing 811, which helps to improve stability. Since the hydraulic motor 505 adopts the characteristics of a plunger-type hydraulic motor, it has a large output torque and high volumetric efficiency, making it suitable for high-pressure and high-load working conditions. Moreover, the hydraulic system can operate stably under high-pressure and high-load conditions. The design and manufacturing process of the parts ensures that they are robust and durable, and can withstand greater pressure and impact, reducing the possibility of failure and improving reliability. When the second connecting shaft 810 drives the main shaft 805 to rotate, it can drive the blade body 804 to perform centrifugal motion to cut grass and shred branches, avoiding the reaction force caused by the hydraulic motor directly driving the grass shredder, thus improving the service life of the hydraulic motor 505.

[0045] This application can be used in the field of lawnmowers, or in other fields applicable to this application. Example

[0046] refer to Figures 1-9 An improvement based on Embodiment 1: a lawnmower with a built-in hydraulic motor, which is applied to the lawnmower field;

[0047] The connector 4 includes a first bushing 401, a second bushing 402, an ear plate 403, a back plate 404, a pin 405, and an ear seat plate 406. The two first bushings 401 and the two second bushings 402 are respectively fixedly installed on one side of the two ear plates 403. The two pins 405 are rotatably connected between the two ear plates 403 through the first bushings 401 and the second bushings 402. The back plate 404 is welded to the top side of the ear seat plate 406, and the ear seat plate 406 is welded to the bottom side of the two ear plates 403. The ear seat plate 406 is fixedly installed on the top side of the housing 6 by multiple bolts. The first bushings 401 and the second bushings 402 are respectively fixed on the two ear plates 403. The pins 405 pass through the bushings to achieve hinge connection. After the back plate 404 is welded to the ear seat plate 406, the ear seat plate 406 is fixed to the top side of the housing 6 by bolts, thereby realizing quick connection with the excavator arm 1 and improving convenience and applicability.

[0048] The belt tensioning device 7 includes a compression spring 701, an adjusting screw 702, a device fixing shaft 703, a second straight-through pressure injection cup 704, a bearing fixing shaft 705, a third bearing 706, an adjusting wheel 707, and a connecting plate 708. The device fixing shaft 703 is fixedly installed on one side of the left vertical plate 604. The connecting plate 708 is welded to the outer wall of the device fixing shaft 703. The bearing fixing shaft 705 is welded to one side of the connecting plate 708. The adjusting wheel 707 is rotatably connected to the outer wall of the bearing fixing shaft 705 through the third bearing 706 and is used to adjust the tension of the belt 809. The second straight-through pressure injection cup 704 is located at one end of the bearing fixing shaft 705 and is used to lubricate and maintain the third bearing 706. The device fixing shaft 703 is fixed by bolts and nuts. Installed on one side of the connecting plate 708, the compression spring 701 is sleeved on the outer wall of the device fixing shaft 703 to facilitate the adjustment of the position of the adjusting wheel 707, thereby adjusting the tension of the belt 809 and improving the transmission efficiency of the belt 809. The adjusting wheel 707 is rotatably connected to the bearing fixing shaft 705 through the third bearing 706. The compression spring 701 is sleeved on the device fixing shaft 703, which can provide elastic support for the adjusting wheel 707. By adjusting the adjusting screw 702, the compression amount of the compression spring 701 can be changed, thereby adjusting the position of the adjusting wheel 707 and thus adjusting the tension of the belt 809, improving the transmission efficiency of the belt 809, and avoiding the need to replace the belt after it stretches after a certain period of use, thus saving costs.

[0049] In summary, the components with bearings are equipped with a first lubricating oil hose 506, a second straight-through pressure injection cup 704, a second lubricating oil hose 808, and a first straight-through pressure injection cup 814, thereby avoiding reduced transmission efficiency and shorter service life of the bearings due to insufficient lubrication.

[0050] However, as is well known to those skilled in the art, the working principles and wiring methods of the excavator arm 1 and the hydraulic motor 505 are commonplace and are all conventional methods or common knowledge. They will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0051] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations, but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0052] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A lawnmower with a built-in hydraulic motor, comprising: The excavator arm (1), hydraulic oil pipe (2), built-in hydraulic motor lawnmower (3) and connector (4) are characterized in that the connector (4) is located at one end of the excavator arm (1), and the built-in hydraulic motor lawnmower (3) includes a hydraulic drive system (5), a machine box (6), a belt tensioning device (7), a grass shredder (8) and a splash-proof chain (9). The hydraulic oil pipe (2) is fixedly installed on the outside of the excavator arm (1) for transmitting hydraulic power to the built-in hydraulic motor lawnmower (3). The built-in hydraulic motor lawnmower (3) is located at one end of the excavator arm (1). The hydraulic drive system (5) is located on the top of the machine box (6). The grass shredder (8) is located inside the machine box (6). The belt tensioning device (7) is located on one side of the machine box (6). Multiple anti-splash chains (9) are fixedly installed on one side of the machine box (6) by bolts to prevent the discharged grass and branches from splashing everywhere during the mowing process.

2. A lawnmower with a built-in hydraulic motor according to claim 1, characterized in that, The connector (4) includes a first bushing (401), a second bushing (402), an ear plate (403), a back plate (404), a pin (405), and an ear seat plate (406). The two first bushings (401) and the two second bushings (402) are respectively fixedly installed on one side of the two ear plates (403). The two pins (405) are rotatably connected between the two ear plates (403) through the first bushings (401) and the second bushings (402). The back plate (404) is welded to the top side of the ear seat plate (406). The ear seat plate (406) is welded to the bottom side of the two ear plates (403). The ear seat plate (406) is fixedly installed on the top side of the chassis (6) by multiple bolts.

3. A lawnmower with a built-in hydraulic motor according to claim 1, characterized in that, The chassis (6) includes a top cover plate (601), side cover plates (602), reinforcing ribs (603), a left upright plate (604), lifting lugs (605), a middle partition plate (606), a front bending plate (607), a rear bending plate (608), a one-way hydraulic valve mounting plate (609), a connector mounting plate (610), and a right upright plate (611). The middle partition plate (606) is welded between the left upright plate (604) and the right upright plate (611). The front bending plate (607) and the rear bending plate (608) are respectively fixed to the left upright plate (604) and the right upright plate (611) by bolts. The top cover plate (601), the one-way hydraulic valve... The mounting plate (609) and the connector mounting plate (610) are both fixedly installed on the top side of the front bending plate (607) and the rear bending plate (608) by bolts. The connector mounting plate (610) is used for the installation and fixing of the connector (4). The side cover plate (602) is fixedly installed on one side of the front bending plate (607) and the rear bending plate (608) by screws. A plurality of waist-shaped heat dissipation holes are opened on one side of the side cover plate (602). A plurality of reinforcing ribs (603) are welded to both sides of the left upright plate (604) and the right upright plate (611). Two lifting lugs (605) are welded to the top side of the front bending plate (607) and the rear bending plate (608).

4. A lawnmower with a built-in hydraulic motor according to claim 3, characterized in that, The hydraulic drive system (5) includes a first hydraulic check valve (501), a pressure relief oil pipe (502), a second hydraulic check valve (503), a hydraulic motor oil pipe (504), a hydraulic motor (505), a first lubricating oil hose (506), a coupling (507), a drive pulley (508), a stop nut (509), a first bearing (510), and a splined shaft (511). The first hydraulic check valve (501) is fixedly installed on the top side of the check hydraulic valve mounting plate (609) by bolts. One end of the pressure relief pipe (502) is connected to the top of the first hydraulic check valve (501), and the other end is connected to the hydraulic motor (505). The second hydraulic check valve (503) is located on the outer wall of the pressure relief pipe (502). One end of each of the two hydraulic motor pipes (504) is connected to one side of the first hydraulic check valve (501), and the other end is connected to the hydraulic motor (505). The hydraulic motor (505) is fixedly installed on the top of the intermediate partition (606) by bolts.

5. A lawnmower with a built-in hydraulic motor according to claim 4, characterized in that, The output end of the hydraulic motor (505) is fixedly connected to one end of the spline shaft (511). The coupling (507) is fixedly installed on the outer wall of the output end of the hydraulic motor (505). The spline shaft (511) is rotatably connected to the inner wall of the coupling (507) through two first bearings (510). The first lubricating oil hose (506) is connected to the outer wall of the coupling (507) for lubricating and maintaining the two first bearings (510). The drive pulley (508) is inserted into the outer wall of the spline shaft (511). The stop nut (509) is threadedly connected to the outer wall of the other end of the matching spline shaft (511) for limiting and fixing the drive pulley (508).

6. A lawnmower with a built-in hydraulic motor according to claim 5, characterized in that, The grass-chopping device (8) includes a first bearing seat (801), a blade fixing shaft (802), a blade holder (803), a blade body (804), a main shaft (805), a second bearing seat (806), a driven pulley (807), a second lubricating oil hose (808), a belt (809), a second connecting shaft (810), a second bearing (811), a bearing pin fixing plate (812), a third connecting shaft (813), and a first straight-through pressure injection cup (814). The first bearing seat (801) and the second bearing seat (806) are respectively fixedly installed on one side of the right upright plate (611) and the left upright plate (604). The second connecting shaft (810) and the third connecting shaft (813) are respectively fixed to both ends of the main shaft (805) by the bearing pin fixing plate (812). The connecting shaft (813) is rotatably connected to the inside of the first bearing seat (801) and the second bearing seat (806) respectively through the second bearing (811). The second lubricating oil hose (808) and the first straight-through pressure injection cup (814) are connected to the first bearing seat (801) and the second bearing seat (806) respectively, and are used to lubricate and maintain the two second bearings (811). The driven pulley (807) is fixedly installed on the outer wall of the second connecting shaft (810). The belt (809) is sleeved on the driving pulley (508) and the driven pulley (807) and is used to drive the main shaft (805) to rotate. The multiple blade holders (803) are welded to the outer wall of the main shaft (805). Each blade body (804) is rotatably connected between the blade holders (803) through the blade fixing shaft (802) and is used to achieve the grass cutting effect.

7. A lawnmower with a built-in hydraulic motor according to claim 6, characterized in that, The belt tensioning device (7) includes a compression spring (701), an adjusting screw (702), a device fixing shaft (703), a second straight-through pressure injection cup (704), a bearing fixing shaft (705), a third bearing (706), an adjusting wheel (707), and a connecting plate (708). The device fixing shaft (703) is fixedly installed on one side of the left upright plate (604). The connecting plate (708) is welded to the outer wall of the device fixing shaft (703). The bearing fixing shaft (705) is welded to one side of the connecting plate (708). The adjusting wheel (707) is connected to the third bearing (706). The device is rotatably connected to the outer wall of the bearing fixing shaft (705) for adjusting the tension of the belt (809). The second straight-through pressure injection cup (704) is set at one end of the bearing fixing shaft (705) for lubricating and maintaining the third bearing (706). The device fixing shaft (703) is fixedly installed on one side of the connecting plate (708) by bolts and nuts. The compression spring (701) is sleeved on the outer wall of the device fixing shaft (703) to facilitate the adjustment of the position of the adjusting wheel (707), thereby adjusting the tension of the belt (809) and improving the transmission efficiency of the belt (809).

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