A compact ride-on skid loader

Abstract

A small seat type skid steer loader, comprising a frame and a working system, a hydraulic system, a power system, a transmission system and a control system mounted on the frame, while realizing the light weight of the device, the structural strength is guaranteed; The lifting arm adopts a rectangular tube structure plus a triangular reinforcing rib design, the damping sleeve and the buffer spring of the control system form a double anti-shake structure, which can reduce the vibration conduction of the device to the steering handle, reduce the operator's operation fatigue, improve the control precision, the electromagnetic clutch can realize the on-demand connection of the engine and the hydraulic pump, and the connection is disconnected under light load or shutdown, the engine oil consumption is reduced, the overall size can pass through a 1m wide channel, which is suitable for indoor decoration, small warehouse, narrow roadway and other special scenes, and can meet the needs of building cleaning and transportation, agricultural cultivation, municipal maintenance, warehouse loading and unloading and other operation requirements, and expand the application range of traditional small skid steer loader.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery and equipment technology, specifically to a small ride-on skid steer loader. Background Technology

[0002] Skid steer loaders, also known as skid steer loaders or multi-purpose engineering machines, are wheeled specialized equipment that uses the difference in linear speed between the wheels on both sides to achieve vehicle steering. They are mainly used in situations with uneven terrain and frequently changing tasks, such as infrastructure construction, industrial applications, dock loading and unloading, urban street work, residential repairs, barn cleaning, livestock shed maintenance, and airport runway maintenance. They can also be used as auxiliary equipment for large-scale engineering construction machinery.

[0003] Existing small ride-on skid steer loaders have the following shortcomings: First, their structural design is not compact enough. Although they are miniaturized, they still suffer from insufficient steering flexibility when operating in confined spaces (such as interior decoration areas or small warehouses). Second, the working system lacks a buffer mechanism during lifting and lowering, making it prone to vibration due to sudden load changes, affecting operational accuracy and reducing component lifespan. Third, the control system is mostly rigidly connected, making the driver susceptible to fatigue due to equipment vibration transmission, and resulting in poor control precision. Fourth, the matching degree between the power system and hydraulic system is insufficient, leading to excessive energy consumption under light load conditions, which does not meet energy-saving requirements. Therefore, there is an urgent need for a small ride-on skid steer loader that combines compactness, stability, energy efficiency, and safety. Utility Model Content

[0004] One advantage of this invention is that it provides a small ride-on skid steer loader that achieves lightweight design while maintaining structural strength. The lifting arm adopts a rectangular tube structure with triangular reinforcing ribs. The damping sleeve and buffer spring of the control system form a double anti-vibration structure, which can reduce the transmission of equipment vibration to the control handle, reduce driver fatigue, and improve control precision. The electromagnetic clutch can connect the engine and hydraulic pump on demand and disconnect them when under light load or when the machine is stopped, reducing engine fuel consumption. The overall size allows it to pass through a 1m wide passage, making it suitable for special scenarios such as interior decoration, small warehouses, and narrow alleys. It can meet various operational needs such as construction cleaning, agricultural cultivation, municipal maintenance, and warehousing loading and unloading, expanding the application range of traditional small skid steer loaders.

[0005] To achieve at least one of the advantages of this utility model, this utility model provides a small ride-on skid steer loader, including a frame and a working system, hydraulic system, power system, transmission system, and control system mounted on the frame. The power system includes an engine, an electromagnetic clutch, and a hydraulic pump. The output end of the engine is connected to the input end of the electromagnetic clutch, and the output end of the electromagnetic clutch is connected to the power input end of the hydraulic pump. The hydraulic system includes a multi-way valve, a lifting cylinder, and a buffer assembly. The hydraulic pump is connected to the multi-way valve, the multi-way valve is connected to the lifting cylinder, the buffer assembly is coupled to the lifting cylinder, and one end of the lifting cylinder is hinged to the vehicle frame. The control system includes a control handle and a stabilization mechanism. The stabilization mechanism is mounted on the control handle, and the control handle is connected to the multi-way valve control. The transmission system includes a travel motor, a gearbox, and drive tires. The travel motor is connected to a multi-way valve, and the output end of the travel motor is connected to the drive tires through the gearbox. The gearbox is a planetary gear reduction structure. The working system includes a lifting arm and a quick-change attachment joint. The quick-change attachment joint is located at the front end of the lifting arm, the rear end of the lifting arm is hinged to the vehicle frame, and the other end of the lifting cylinder is hinged to the lifting arm.

[0006] According to one embodiment of the present invention, the buffer assembly includes a hydraulic buffer and a buffer spring. The hydraulic buffer is connected in parallel with the rodless chamber of the lifting cylinder. The buffer spring is coaxially sleeved on the piston rod of the lifting cylinder, and the two ends of the buffer spring abut against the cylinder end and the piston rod end of the lifting cylinder, respectively.

[0007] According to one embodiment of the present invention, the anti-shake mechanism includes a guide sleeve, a buffer spring, and a damping sleeve. The guide sleeve is fixed to the control panel of the vehicle frame. The operating handle passes through the damping sleeve, the buffer spring, and the guide sleeve in sequence and is hinged to the valve core control rod of the multi-way valve. The buffer spring is located between the guide sleeve and the damping sleeve. The damping sleeve is interference-fitted with the operating handle. The guide sleeve is fixed to the control panel by bolts. The damping sleeve is made of elastic material.

[0008] According to one embodiment of the present invention, the output end of the engine is coaxially and fixedly connected to the input end of the electromagnetic clutch, and the output end of the electromagnetic clutch is keyed to the power input end of the hydraulic pump; the oil outlet of the hydraulic pump is connected to the oil inlet of the multi-way valve through a high-pressure oil pipe, and the first working oil port of the multi-way valve is connected to the rodless chamber of the lifting cylinder through a high-pressure oil circuit.

[0009] According to one embodiment of the present invention, the oil inlet of the travel motor is connected to the fourth working oil port of the multi-way valve, the output shaft of the travel motor is connected to the input shaft of the gearbox through a coupling, the output shaft of the gearbox is connected to the rim of the drive tire through a spline, and the gearbox is fixed to the bottom of the vehicle frame.

[0010] According to one embodiment of the present invention, the attachment quick-change connector is hinged to the front end of the lifting arm, and a bucket cylinder is hinged to the middle of the lifting arm. The other end of the bucket cylinder is hinged to the upper part of the attachment quick-change connector. The attachment quick-change connector is provided with a quick-change cylinder, and a bucket is detachably connected through the quick-change cylinder.

[0011] According to one embodiment of the present invention, the second working port of the multi-way valve is connected to the bucket cylinder, and the third working port of the multi-way valve is connected to the hydraulic interface of the quick-change cylinder.

[0012] According to one embodiment of the present invention, the rear end of the lifting arm is hinged to the vehicle frame via a ball joint, the middle part of the lifting arm is hinged to the piston rod end of the lifting cylinder via a pin, the bottom of the cylinder of the lifting cylinder is hinged to the vehicle frame via a pin, and the inner sidewall of the lifting arm is welded with reinforcing ribs.

[0013] According to one embodiment of the present invention, the reinforcing ribs are right-angled triangular structures and are evenly arranged along the length of the lifting arm.

[0014] According to one embodiment of the present invention, the frame is integrally formed from high-strength aluminum alloy material, the front of the frame is equipped with an instrument panel, and the middle and rear of the frame is equipped with a seat. The instrument panel is electrically connected to the engine sensors and the controller of the electromagnetic clutch. The seat is an adjustable engineering seat. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the structure of this utility model; In the attached diagram: 1. Engine, 2. Seat, 3. Roof, 4. Multi-way valve, 5. Frame, 6. Tire, 7. Control handle, 8. Quick-change cylinder, 9. Bucket cylinder, 10. Bucket, 11. Lifting arm. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description will be provided in conjunction with the appendix of this utility model. Figure 1 ~Appendix Figure 2 The present invention will be described in more detail below.

[0017] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0018] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0020] This utility model provides a small ride-on skid steer loader, including a frame 5 and a working system, hydraulic system, power system, transmission system, and control system mounted on the frame 5. The power system includes an engine 1, an electromagnetic clutch, and a hydraulic pump. The output end of the engine 1 is drivenly connected to the input end of the electromagnetic clutch, and the output end of the electromagnetic clutch is drivenly connected to the power input end of the hydraulic pump. The hydraulic system includes a multi-way valve 4, a lifting cylinder, and a buffer assembly. The hydraulic pump is connected to the multi-way valve 4, the multi-way valve 4 is connected to the lifting cylinder, and the buffer assembly is coupled to the lifting cylinder. One end of the lifting cylinder is hinged to the frame 5. The control system includes a control handle 7 and an anti-shake mechanism, which is sleeved on the frame 5. The control handle 7 is connected to the multi-way valve 4. The transmission system includes a travel motor, a gearbox, and drive tires 6. The travel motor is connected to the multi-way valve 4, and the output end of the travel motor is connected to the drive tires 6 through the gearbox, which is a planetary gear reduction structure. The working system includes a lifting arm 11 and a quick-change attachment connector. The quick-change attachment connector is located at the front end of the lifting arm 11, and the rear end of the lifting arm 11 is hinged to the frame 5. The other end of the lifting cylinder is hinged to the lifting arm 11. The buffer assembly includes a hydraulic buffer and a buffer spring. The hydraulic buffer is connected in parallel to the rodless chamber of the lifting cylinder, and the buffer spring is coaxially sleeved on the piston rod of the lifting cylinder. The two ends of the buffer spring are respectively connected to the cylinder end of the lifting cylinder. The piston rod end abuts against the damping mechanism, which includes a guide sleeve, a buffer spring, and a damping sleeve. The guide sleeve is fixed to the control panel of the frame 5. The control handle 7 passes through the damping sleeve, the buffer spring, and the guide sleeve in sequence and is hinged to the valve core control rod of the multi-way valve 4. The buffer spring is located between the guide sleeve and the damping sleeve. The damping sleeve is interference-fitted with the control handle 7. The guide sleeve is fixed to the control panel by bolts. The damping sleeve is made of elastic material. The output end of the engine 1 is coaxially and fixedly connected to the input end of the electromagnetic clutch. The output end of the electromagnetic clutch is keyed to the power input end of the hydraulic pump. The oil outlet of the hydraulic pump is connected to the oil inlet of the multi-way valve 4 through a high-pressure oil pipe. The first working oil port of the multi-way valve 4 is connected to the lifting cylinder through a high-pressure oil circuit. The rod cavity is connected; the oil inlet of the travel motor is connected to the fourth working oil port of the multi-way valve 4, the output shaft of the travel motor is connected to the input shaft of the gearbox through a coupling, the output shaft of the gearbox is connected to the rim of the drive tire 6 through a spline, and the gearbox is fixed to the bottom of the frame 5; the attachment quick-change joint is hinged to the front end of the lifting arm 11, and the middle part of the lifting arm 11 is hinged to the bucket cylinder 9, the other end of the bucket cylinder 9 is hinged to the upper part of the attachment quick-change joint, the attachment quick-change joint is provided with a quick-change cylinder 8, and the bucket 10 is detachably connected through the quick-change cylinder 8; the second working oil port of the multi-way valve 4 is connected to the bucket cylinder 9, and the third working oil port of the multi-way valve 4 is connected to the hydraulic interface of the quick-change cylinder 8;The rear end of the lifting arm 11 is hinged to the frame 5 via a ball joint. The middle part of the lifting arm 11 is hinged to the piston rod end of the lifting cylinder via a pin. The bottom of the cylinder barrel of the lifting cylinder is hinged to the frame 5 via a pin. Reinforcing ribs are welded to the inner wall of the lifting arm 11; the reinforcing ribs are right-angled triangular structures and are evenly distributed along the length of the lifting arm 11. The frame 5 is integrally formed from high-strength aluminum alloy. An instrument panel is located at the front of the frame 5, and a seat 2 is located at the middle and rear of the frame 5. The instrument panel is electrically connected to the sensors of the engine 1 and the controller of the electromagnetic clutch. The seat 2 is an adjustable engineering seat.

[0021] The first embodiment of this utility model is as follows: A small ride-on skid steer loader includes a frame 5, which is integrally welded from high-strength metal. The main frame is rectangular, measuring 1800mm in length, 900mm in width, and 850mm in height (excluding the roof 3), with a plate thickness of 10mm, achieving lightweight design while ensuring structural strength. The frame 5 has a pre-installed mounting bracket for the engine 1, a control panel mounting area in the middle, and a seat 2 bracket welded to the rear. Each mounting area is equipped with locating pin holes and bolt holes to ensure precise installation of all components.

[0022] The working system, hydraulic system, power system, transmission system, and control system are all mounted on the frame 5; The power system includes engine 1, electromagnetic clutch and hydraulic pump. Engine 1 is selected from either a Briton 208cc single-cylinder gasoline engine 1, a Runtong 190cc single-cylinder diesel engine 1 or a Kepu 210cc single-cylinder gasoline engine 1. The output end of engine 1 is coaxially fixedly connected to the input end of electromagnetic clutch. The electromagnetic clutch is selected from DLM3-10 dry electromagnetic clutch. Its output end is connected to the power input end of hydraulic pump through a key to ensure the stability and controllability of power transmission.

[0023] The single-cylinder diesel engine 1 is fixed to the engine 1 mounting bracket of the frame 5 with M12 bolts. The output shaft of the engine 1 is coaxially fixed with the input end of the DLM3-10 electromagnetic clutch through a coupling. The output end of the electromagnetic clutch is connected to the power input end of the hydraulic pump through a flat key. The control line of the electromagnetic clutch is connected to the controller of the instrument panel.

[0024] The hydraulic system includes a multi-way valve 4, a lifting cylinder, a bucket cylinder 9, a quick-change cylinder 8, and a buffer assembly. The outlet of the hydraulic pump is sealed to the inlet of the multi-way valve 4 through a high-pressure oil pipe. The multi-way valve 4 is a ZT-L12E-3OT type multi-way directional valve. Its first working port is connected to the rodless chamber of the lifting cylinder through a high-pressure oil circuit, its second working port is connected to the rodless chamber of the bucket cylinder 9, and its third working port is connected to the hydraulic interface of the quick-change cylinder 8, so as to realize independent control of different actuators.

[0025] The buffer assembly includes a hydraulic damper and a buffer spring. The hydraulic damper is of type AC1416, with its inlet connected in parallel to the inlet of the rodless chamber of the lifting cylinder, and its return port connected to the hydraulic system's return oil tank. It can buffer the hydraulic shock during lifting in real time. The buffer spring is coaxially sleeved on the piston rod of the lifting cylinder, with one end of the spring abutting against the end of the cylinder and the other end abutting against the flange at the end of the piston rod. Together with the hydraulic damper, it forms a double buffering effect.

[0026] The hydraulic pump's inlet is connected to the return oil tank via an oil suction filter, and its outlet is sealed to the inlet of the multi-way valve 4 via a high-pressure oil pipe. The first working port of the multi-way valve 4 is connected to the rodless chamber of the lifting cylinder via a high-pressure oil pipe, the second working port is connected to the rodless chamber of the bucket cylinder 9 via a high-pressure oil pipe, the third working port is connected to the hydraulic interface of the quick-change cylinder 8 via a high-pressure oil pipe, and the fourth working port is connected to the inlet of the travel motor via a high-pressure oil pipe. The inlet of the AC1416 hydraulic buffer is connected in parallel to the inlet of the rodless chamber of the lifting cylinder via a tee connector, and its return port is connected to the return oil tank. A φ20mm×φ10mm buffer spring is coaxially sleeved on the piston rod of the lifting cylinder, ensuring that both ends abut against the cylinder end and the piston rod flange, respectively.

[0027] The transmission system includes a travel motor, a gearbox, and drive tires 6. The travel motor is a BM1-200 cycloidal hydraulic motor, whose inlet is connected to the fourth working port of the multi-way valve 4 to achieve hydraulic power drive. The output shaft of the travel motor is connected to the input shaft of the gearbox via a coupling. The gearbox adopts a planetary gear structure, which is carburized and quenched to improve wear resistance. The transmission ratio is set to 1:5, which can amplify the output torque of the travel motor to 1000 N·m. The output shaft of the gearbox is connected to the rim of the drive tires 6 via a spline. At the same time, the gearbox is fixed to the bottom of the frame 5 with bolts to ensure structural stability during transmission.

[0028] The travel motor is fixed to the motor mounting bracket at the bottom of the frame 5 by four M10 bolts. Its output shaft is connected to the input shaft of the planetary gear reducer through a flexible coupling. The reducer is fixed to the bottom of the frame 5 by six M12 bolts. The output shaft of the reducer is connected to the rim of the drive tire 6 through a spline to ensure stable power transmission.

[0029] The working system includes a lifting arm 11, a quick-change bracket, and a quick-change connector for the attachments. The lifting arm 11 is welded from Q345B steel plate, with a rectangular tube structure, an inner diameter of 150mm × 80mm, and a wall thickness of 8mm. The quick-change connector for the attachments is forged from 45# steel and precision machined. The connector has a φ12mm positioning pin hole along the horizontal direction. The positioning pin is a φ12mm × 80mm 40Cr cylindrical pin, which is limited by a φ6mm stainless steel corrugated elastic retaining pin on the side wall after insertion. The elastic deformation of the elastic retaining pin ensures that the positioning pin is firmly installed and easy to disassemble. The rear end of the lifting arm 11 is hinged to the brackets on both sides of the frame 5 through a GE120ES type radial spherical joint bearing (ball joint), allowing for flexible rotation at multiple angles. The middle part of the lifting arm 11 is hinged to the piston rod end of the lifting cylinder through a pin shaft. The bottom of the cylinder barrel of the lifting cylinder is hinged to the frame 5, forming a stable lifting power transmission structure. Three 8mm thick Q235B reinforcing ribs are welded to the inner wall of the lifting arm 11. The cross-section is a right-angled triangle and the weld leg height is 6mm, which effectively improves the load-bearing capacity of the lifting arm 11.

[0030] The ball joint at the rear end of the lifting arm 11 is interference-fitted with the hinge shafts of the side supports of the frame 5. The hinge hole in the middle of the lifting arm 11 is connected to the pin at the end of the piston rod of the lifting cylinder. The lug at the bottom of the lifting cylinder barrel is hinged to the cylinder support at the bottom of the frame 5 via a pin. After the quick-change fitting is welded to the front end of the lifting arm 11, a φ12mm×80mm locating pin is inserted, and then a φ6mm wave-shaped elastic retaining pin is pressed into the retaining pin hole to complete the quick-change fitting assembly. Three 8mm thick reinforcing ribs are welded to the inner side of the lifting arm 11, and stress relief treatment is performed after welding.

[0031] The control system includes a control handle 7, a vibration damping mechanism, and an instrument panel. The instrument panel is an XK-800 engineering instrument panel, bolted to the control panel at the front of the frame 5. It integrates an engine tachometer, hydraulic oil temperature gauge, oil pressure gauge, and operating mode indicator light. It is electrically connected via wires to the engine 1 speed sensor, the hydraulic system temperature sensor, and the electromagnetic clutch controller, displaying real-time equipment operating parameters. The control handle 7 is a dedicated engineering control lever. The vibration damping mechanism includes a guide sleeve, a buffer spring, and a damping sleeve. The guide sleeve is made of 45# steel and fixed to the control panel with M6 bolts, its inner hole fitting the control handle 7 body with a clearance fit. The lower end of the control handle 7 passes through the damping sleeve, buffer spring, and guide sleeve in sequence. The damping sleeve is made of nitrile rubber, its inner hole having an interference fit with the control lever for initial vibration damping. The buffer spring is a cylindrical helical spring, located between the guide sleeve and the damping sleeve to form secondary vibration damping. The lower end of the control handle 7 is hinged to the valve core control lever of the multi-way valve 4 via a fisheye joint, ensuring precise transmission of control force. Seat 2 is an adjustable engineering seat 2, which is fixed on the bracket at the rear of the frame 5. The seat height can be adjusted within the range of 450-550mm, and the backrest angle can be adjusted within the range of 90°-120°, improving driving comfort.

[0032] The guide sleeve is fixed to the control panel with M6 bolts. The lower end of the control handle 7 passes through the nitrile rubber damping sleeve, the buffer spring, and the guide sleeve in sequence, and the lower end is hinged to the valve core control lever of the multi-way valve 4 via a spherical connector. The instrument panel is fixed to the front of the control panel and is connected to the engine speed sensor (mounted on the flywheel housing of engine 1), the hydraulic oil temperature sensor (mounted on the return port of multi-way valve 4), the oil pressure sensor (mounted on the outlet port of the hydraulic pump), and the electromagnetic clutch controller via wires. The adjustable seat 2 is fixed to the seat 2 bracket at the rear of the frame 5 with four M10 bolts and can be adjusted to a suitable height and backrest angle.

[0033] The working process and debugging points of this embodiment: 1. Start-up and preparation: Check the sealing of each high-pressure oil pipe connection, hydraulic oil level and the tightness of each bolt, start engine 1, and confirm through the instrument panel that the speed, oil pressure and oil temperature are normal and the electromagnetic clutch is in the disengaged state.

[0034] 2. Travel control: Push the operating handle 7 to the travel gear position, and oil will be discharged from the fourth working port of the multi-way valve 4 to the travel motor. At the same time, the electromagnetic clutch is energized and engaged, and the power of the engine 1 is transmitted to the hydraulic pump through the electromagnetic clutch. The travel motor drives the reduction gearbox to rotate the drive tire 6, and the equipment can move forward or backward. The travel speed is controlled by the deflection angle of the operating handle 7. When turning, the speed difference between the two operating handles 7 is used to achieve slip steering.

[0035] 3. Lifting operation: Switch the control handle 7 to the lifting position, and the first working port of the multi-way valve 4 outputs oil to the rodless chamber of the lifting cylinder. The hydraulic damper works synchronously to buffer the oil pressure impact. The buffer spring is gradually compressed as the piston rod extends, further absorbing the impact, and the lifting arm 11 rises smoothly. When descending, the multi-way valve 4 controls the return of oil from the lifting cylinder. Under the action of the buffer component, the lifting arm 11 descends slowly to avoid sudden load changes.

[0036] 4. Bucket 10 operation: Switch to bucket 10 position, oil is discharged from the second working port of multi-way valve 4 to bucket cylinder 9, realizing the flipping and resetting of bucket 10, with precise action response.

[0037] 5. Fixture replacement: Turn off engine 1, pull out the elastic clip of the quick-change connector for the fixture, remove the locating pin, remove the old fixture and install the new fixture, insert the locating pin and press in the elastic clip, check that it is secure and then it can be put into use.

[0038] 6. Shutdown Procedure: Return all control levers 7 to the neutral position, disengage the electromagnetic clutch, and allow engine 1 to idle for 3 minutes before stopping the machine. Clean any debris from the equipment surface. Following these steps ensures the equipment functions stably as described in the instruction manual.

[0039] It should be noted that the terms "first, second, and third" used in this utility model are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0040] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A small ride-on skid steer loader, comprising a frame and a working system, a hydraulic system, a power system, a transmission system, and a control system mounted on the frame, characterized in that: The power system includes an engine, an electromagnetic clutch, and a hydraulic pump. The output end of the engine is connected to the input end of the electromagnetic clutch, and the output end of the electromagnetic clutch is connected to the power input end of the hydraulic pump. The hydraulic system includes a multi-way valve, a lifting cylinder, and a buffer assembly. The hydraulic pump is connected to the multi-way valve, the multi-way valve is connected to the lifting cylinder, the buffer assembly is coupled to the lifting cylinder, and one end of the lifting cylinder is hinged to the vehicle frame. The control system includes a control handle and a stabilization mechanism. The stabilization mechanism is sleeved on the control handle, and the control handle is connected to a multi-way valve. The transmission system includes a travel motor, a reduction gearbox, and a drive tire. The travel motor is connected to a multi-way valve, and the output end of the travel motor is connected to the drive tire through the reduction gearbox. The reduction gearbox is a planetary gear reduction structure. The working system includes a lifting arm and a quick-change attachment joint. The quick-change attachment joint is located at the front end of the lifting arm, the rear end of the lifting arm is hinged to the vehicle frame, and the other end of the lifting cylinder is hinged to the lifting arm.

2. The small ride-on skid steer loader according to claim 1, characterized in that: The buffer assembly includes a hydraulic damper and a buffer spring. The hydraulic damper is connected in parallel with the rodless chamber of the lifting cylinder. The buffer spring is coaxially sleeved on the piston rod of the lifting cylinder, and the two ends of the buffer spring abut against the cylinder end and the piston rod end of the lifting cylinder, respectively.

3. The small ride-on skid steer loader according to claim 1, characterized in that: The anti-shake mechanism includes a guide sleeve, a buffer spring, and a damping sleeve. The guide sleeve is fixed to the control panel of the vehicle frame. The control handle passes through the damping sleeve, the buffer spring, and the guide sleeve in sequence and is hinged to the valve core control rod of the multi-way valve. The buffer spring is located between the guide sleeve and the damping sleeve. The damping sleeve is interference-fitted with the control handle. The guide sleeve is fixed to the control panel by bolts. The damping sleeve is made of elastic material.

4. The small ride-on skid steer loader according to claim 1, characterized in that: The output end of the engine is coaxially and fixedly connected to the input end of the electromagnetic clutch, and the output end of the electromagnetic clutch is keyed to the power input end of the hydraulic pump; the oil outlet of the hydraulic pump is connected to the oil inlet of the multi-way valve through a high-pressure oil pipe, and the first working oil port of the multi-way valve is connected to the rodless chamber of the lifting cylinder through a high-pressure oil circuit.

5. The small ride-on skid steer loader according to claim 1, characterized in that: The oil inlet of the travel motor is connected to the fourth working oil port of the multi-way valve. The output shaft of the travel motor is connected to the input shaft of the gearbox via a coupling. The output shaft of the gearbox is connected to the rim of the drive tire via a spline. The gearbox is fixed to the bottom of the vehicle frame.

6. The small ride-on skid steer loader according to claim 1, characterized in that: The attachment quick-change connector is hinged to the front end of the lifting arm, and a bucket cylinder is hinged to the middle of the lifting arm. The other end of the bucket cylinder is hinged to the upper part of the attachment quick-change connector. The attachment quick-change connector is equipped with a quick-change cylinder, and a bucket is detachably connected to it through the quick-change cylinder.

7. The small ride-on skid steer loader according to claim 6, characterized in that: The second working port of the multi-way valve is connected to the bucket cylinder, and the third working port of the multi-way valve is connected to the hydraulic interface of the quick-change cylinder.

8. The small ride-on skid steer loader according to claim 1, characterized in that: The rear end of the lifting arm is hinged to the vehicle frame via a ball joint, the middle part of the lifting arm is hinged to the piston rod end of the lifting cylinder via a pin, the bottom of the cylinder of the lifting cylinder is hinged to the vehicle frame via a pin, and the inner sidewall of the lifting arm is welded with reinforcing ribs.

9. The small ride-on skid steer loader according to claim 8, characterized in that: The reinforcing ribs are right-angled triangular structures and are evenly arranged along the length of the lifting arm.

10. The small ride-on skid steer loader according to claim 1, characterized in that: The chassis is made of high-strength aluminum alloy in one piece. The front of the chassis is equipped with an instrument panel, and the middle and rear of the chassis are equipped with a seat. The instrument panel is electrically connected to the engine sensors and the controller of the electromagnetic clutch. The seat is an adjustable engineering seat.

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