Outdoor garden operation vehicle

Abstract

The invention relates to an electric outdoor garden operation vehicle which comprises a vehicle frame, a left drive axle assembly, a right drive axle assembly, a mowing component, a power supply component and a brake module. The brake module comprises a brake parking assembly and a foot brake pump. The brake parking assembly comprises a pedal assembly, the pedal assembly extrudes a foot brake pump and generates braking force to the left drive axle assembly and the right drive axle assembly when being treaded by a user, and an oil brake force damping adjusting mechanism is arranged at the foot brake pump and used for enabling the pedal assembly to be continuously treaded when hydraulic oil in the foot brake pump is compressed to the limit. Therefore, a user does not feel the feedback that the brake is too hard in the treading process of the whole pedal assembly; the damping piece has initial damping force after being assembled, so that pedal bounce borne by a user in the treading process of the whole pedal assembly is gradually increased, the section where the bounce is obviously increased does not appear, and the overall braking feeling of the user is improved.

Description

[Technical Field]

[0001] The present invention relates to the technical field of garden operation vehicles, and particularly relates to an outdoor garden operation vehicle. [Background Art]

[0002] Outdoor garden operation vehicles generally refer to vehicles for outdoor garden operations, mainly including vehicles for cutting and maintaining the lawns in gardens.

[0003] The whole vehicle of the garden operation vehicle needs to travel in the garden, so it must be equipped with a braking component to brake it; for example, Chinese Patent No. CN207269396U discloses a braking and parking mechanism for an electric zero-turn mower, including an operating mechanism and a braking mechanism; the operating mechanism is located at the front end of the vehicle frame and includes a brake pedal and a parking pedal, and the braking mechanism includes a hub motor connected to the wheel and a brake caliper located on the vehicle frame, and the brake caliper corresponds to the brake disc of the hub motor. Referring to its attached drawings, it can be clearly known that the brake disc of this technology is located on the wheel axle. Although this patent can achieve a certain braking effect on the wheel, because its brake disc is arranged on the wheel axle, the brake caliper needs to provide a very large clamping torque to achieve effective braking force, and it is difficult for the user to directly step on it to achieve a good braking effect;

[0004] In order to enable the vehicle to effectively stay in a certain position, a parking system is generally set on the vehicle to maintain its relative position when the vehicle is parked. For example, US Patent No. US11589513B2 discloses an integrated parking brake system for a ride-on lawn care vehicle, including a parking brake device that is activated according to the detection of the presence or absence of an operator near the electric off-road work vehicle by an operator presence system. The operator presence system can send a signal to the controller, and the controller may command the parking brake device to be activated between the engaged state and the non-engaged state. There is an obvious difference between the braking and parking operations in this patent, and according to the user's operation habit, when the braking force is large, it should be equivalent to the parking state or directly enter the parking state. Therefore, the operation habit of this patent makes it difficult for users to adapt.

[0005] Braking generally involves applying a braking force to the braking system by pressing or stepping on a certain component. However, due to the structural limitations of the brake disc in the braking system, the friction plate that abuts against it cannot continue to move after it has completely abutted against the brake disc, resulting in the user being unable to continue pressing or stepping on the component and experiencing overly hard braking, which brings a poor user experience. For example, Chinese Patent No. CN114684080B discloses a braking system for an electric lawn mower. This patent integrates the functions of driving braking, emergency braking, and parking braking through a braking control assembly. However, it sets a lower limit bolt to limit the position of the pedal, which obviously causes the pedal to be unable to be stepped on further after braking and results in an overly hard braking feeling. Moreover, in this patent, stepping on the brake pedal a second time in the parked state will release the parked state, which also increases the possibility of misoperation.

[0006] In view of this, it is indeed necessary to provide an outdoor garden working vehicle to overcome the defects of the prior art. [Summary of the Invention]

[0007] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an outdoor garden working vehicle in which the brake pedal can still be stepped on after the friction plate has completely abutted against the brake disc, so that the user's foot feeling is not overly hard.

[0008] The technical solution adopted by the present invention to solve the problems of the prior art is: an electric outdoor garden working vehicle, including:

[0009] A frame;

[0010] A left drive axle assembly and a right drive axle assembly. The left drive axle assembly is mechanically connected to a left drive motor and a left drive wheel to transmit the power of the left drive motor to the left drive wheel; the right drive axle assembly is mechanically connected to a right drive motor and a right drive wheel to transmit the power of the right drive motor to the right drive wheel;

[0011] A mowing component, arranged at the lower part of the frame for cutting the vegetation on the ground;

[0012] A power supply component, electrically connected to the left drive motor, the right drive motor, and the mowing component for supplying power to the left drive motor, the right drive motor, and the mowing component;

[0013] A braking module, including a brake parking assembly and a foot brake pump;

[0014] The brake parking assembly includes a foot pedal assembly. When the foot pedal assembly is stepped on by the user, it squeezes the foot brake pump and generates a braking force on the left drive axle assembly and the right drive axle assembly.

[0015] A further improvement solution is as follows: An oil brake force damping adjustment mechanism is provided at the foot brake pump, which is used to enable the foot pedal assembly to be continuously stepped on when the hydraulic oil in the foot brake pump is compressed to the limit.

[0016] A further improvement solution is as follows: The oil brake force damping adjustment mechanism includes an oil pump bracket and a damping member. The oil pump bracket is fixed to the vehicle frame, and the damping member is connected to the foot brake pump and the oil pump bracket.

[0017] A further improvement solution is as follows: The oil brake force damping adjustment mechanism further includes a guiding member connected to the foot brake pump, and the guiding member is used to limit the foot brake pump to reciprocate only in the direction of being squeezed by the foot pedal assembly.

[0018] A further improvement solution is as follows: The damping member is selected as a damping compression spring, and the guiding member is selected as a bolt. The bolt sequentially passes through the foot brake pump, the damping compression spring and is threadedly connected to the oil pump bracket.

[0019] A further improvement solution is as follows: The damping member has an initial damping force after assembly.

[0020] A further improvement solution is as follows: A limiting rod is fixedly connected to the vehicle frame. The foot pedal assembly includes a main pedal, a hook plate and a hook plate torsion spring. The hook plate is rotatably connected to the main pedal. When the main pedal is stepped on by the user, the hook plate can be hooked on the limiting rod to make the braking module in the parking state. The hook plate torsion spring is arranged on the rotating shaft of the hook plate and is used to generate an elastic force on the hook plate to keep it hooked on the limiting rod in the parking state.

[0021] A further improvement solution is as follows: When the main pedal is stepped on by the user, at least one of the two surfaces where the hook plate and the limiting rod first come into contact is a curved surface, and when the user steps on the main pedal to make the hook plate abut against the limiting rod, the hook plate can rotate until the inner side of the hook plate bypasses the limiting rod and is hooked on the limiting rod.

[0022] A further improvement solution is as follows: The maintaining force of the hook plate torsion spring to maintain the contact between the hook plate and the limiting rod is 5N - 30N.

[0023] A further improvement solution is as follows: The maintaining force of the hook plate torsion spring to maintain the contact between the hook plate and the limiting rod is 7N.

[0024] A further improvement solution is as follows: When the main pedal is in the natural release state, the damping compression spring is in state 1. When the hook plate is hooked on the limiting rod, the damping compression spring is in state 2. The compression amount of the brake compression spring in state 2 is greater than that in state 1.

[0025] A further improvement solution is as follows: The difference in the compression amounts of the damping compression spring between state 2 and state 1 is 1mm - 60mm.

[0026] A further improvement solution is as follows: The pedal assembly further includes a secondary pedal, and when the user steps on the secondary pedal, the braking module can be released from the parked state.

[0027] A further improvement solution is as follows: The main pedal and the secondary pedal can be stepped on simultaneously or separately with a single foot.

[0028] A further improvement solution is as follows: The secondary pedal is movably connected to the main pedal. When the secondary pedal is stepped on by the user, it moves and presses the hook plate, causing the hook plate to rotate away from the limit rod and disengage from the limit rod.

[0029] A further improvement solution is as follows: The maximum rotation angle of the hook plate when the user steps on the secondary pedal and drives the hook plate from the state of hooking the limit rod to the state of disengaging from the limit rod is 5° to 30°.

[0030] A further improvement solution is as follows: The secondary pedal is rotatably connected to the main pedal, and the rotation angle range of the secondary pedal when the user steps on it is 0 to 90°.

[0031] A further improvement solution is as follows: A secondary pedal torsion spring is provided at the hinge joint between the secondary pedal and the main pedal, and the secondary pedal torsion spring keeps the secondary pedal in a state of not pressing the hook plate when not stepped on.

[0032] A further improvement solution is as follows: The stepping force for the user to step on the secondary pedal and disengage the hook plate from the limit rod is 3N to 100N.

[0033] A further improvement solution is as follows: The brake parking assembly is hinged to the frame and forms a force-saving lever with the foot brake pump; when the user steps on the brake parking assembly, the ratio of the input force arm to the output force arm of the force-saving lever is 1 to 20:1, and the stepping force for the user to step on the brake parking assembly to achieve braking is 20N to 500N.

[0034] A further improvement solution is as follows: The stepping force for the user to step on the pedal assembly to achieve braking is 30N to 200N.

[0035] A further improvement solution is as follows: The brake parking assembly further includes a rotating plate and a brake spring. The rotating plate is rotatably connected to the frame. The pedal assembly is fixedly connected to the rotating plate. The two ends of the brake spring are respectively connected to the frame and the rotating plate. A threaded push rod is connected to the rotating plate. When the user steps on the pedal assembly, the rotating plate rotates and pulls the brake spring, pushing the threaded push rod to press the foot brake pump and generate a braking force.

[0036] A further improvement solution is as follows: The brake spring is a brake torsion spring, and one end of the brake torsion spring rotates synchronously when the user steps on the pedal assembly and causes the rotating plate to rotate.

[0037] A further improvement solution is as follows: The brake spring is a brake compression spring, and when the user steps on the pedal assembly, the rotating plate rotates and compresses the brake compression spring.

[0038] A further improvement solution is as follows: The brake spring is selected as a brake pull spring. When the user steps on the foot pedal assembly, the rotating plate rotates and stretches the brake pull spring.

[0039] A further improvement solution is as follows: The brake parking assembly further includes a fixed bracket fixedly connected to the vehicle frame. The rotating plate is rotatably connected to the fixed bracket. Two ends of the brake spring are respectively connected to the fixed bracket and the rotating plate.

[0040] A further improvement solution is as follows: The braking module further includes: a hydraulic pipe, a left brake assembly, and a right brake assembly. When the user steps on the foot pedal assembly, the foot brake pump is triggered to generate braking pressure, which acts on the left brake assembly and the right brake assembly through the hydraulic pipe at the same time, generating braking force on the left drive axle assembly and the right drive axle assembly, so that the left drive wheel and the right drive wheel are braked.

[0041] A further improvement solution is as follows: The left drive axle assembly and the right drive axle assembly are selected as reduction gearboxes of two or more levels. The reduction gearbox includes an input shaft, an output shaft, and an intermediate shaft.

[0042] The left brake assembly and the right brake assembly are respectively arranged on non-output shafts of the corresponding reduction gearboxes.

[0043] A further improvement solution is as follows: The left brake assembly and the right brake assembly are respectively arranged on the intermediate shafts of the corresponding reduction gearboxes.

[0044] A further improvement solution is as follows: The left brake assembly and the right brake assembly both include brake slave cylinders installed on the corresponding drive axle assemblies. A brake disc is fixedly connected to the shaft where the left brake assembly or the right brake assembly is arranged. When the user steps on the foot pedal assembly, the brake slave cylinder squeezes the brake disc to generate braking force.

[0045] A further improvement solution is as follows: The brake slave cylinder includes a slave cylinder hydraulic cylinder, a slave cylinder rod, and a friction plate. When the foot brake pump is connected to the slave cylinder hydraulic cylinder through the hydraulic pipe and provides braking pressure, the slave cylinder rod makes the friction plate squeeze the brake disc to form braking force.

[0046] A further improvement solution is as follows: The number of cylinders of the brake slave cylinder is odd. The slave cylinder hydraulic cylinder is slidably installed on the vehicle frame or the corresponding reduction gearbox. The friction plate includes a dynamic friction plate and a static friction plate. The dynamic friction plate is fixed to the slave cylinder rod and is located on one side of the brake disc. The static friction plate is arranged on the other side of the brake disc. When the foot brake pump provides braking pressure to the slave cylinder hydraulic cylinder, the slave cylinder rod pushes the dynamic friction plate and the static friction plate to press the brake disc tightly.

[0047] A further improvement solution is as follows: the number of cylinders of the brake slave cylinder is an even number, the slave cylinder hydraulic cylinder is slidably installed on the vehicle frame or the corresponding reduction gearbox, two of the friction plates are fixed to the slave cylinder rod and are located on both sides of the brake disc. When the foot brake pump provides braking pressure to the slave cylinder hydraulic cylinder, the slave cylinder rod pushes the two dynamic friction plates to press against the brake disc.

[0048] A further improvement solution is as follows: a floating mounting bracket is fixed on the vehicle frame or the corresponding reduction gearbox, and the slave cylinder hydraulic cylinder is slidably connected to the floating mounting bracket.

[0049] A further improvement solution is as follows: the thickness of the brake disc is 2 mm to 6 mm, and the diameter of the brake disc is 60 mm to 300 mm.

[0050] A further improvement solution is as follows: the hydraulic pressure range of the brake slave cylinder is 2 Mpa to 40 Mpa, and the piston stroke of the slave cylinder rod is 0.5 mm to 20 mm.

[0051] A further improvement solution is as follows: the diameter of the foot brake pump cylinder rod is 5 mm to 30 mm, the diameter of the slave cylinder hydraulic cylinder is 5 mm to 40 mm, and the stroke of the foot brake pump cylinder rod is 5 mm to 100 mm.

[0052] A further improvement solution is as follows: the reduction ratio of the intermediate shaft of the left brake assembly or the right brake assembly to the corresponding output shaft is set to 1 to 50.

[0053] A further improvement solution is as follows: the left drive axle assembly and the right drive axle assembly are equipped with a two-stage reduction gearbox, and the reduction ratio of the intermediate shaft of the left brake assembly or the right brake assembly to the corresponding output shaft is set to 3 to 6.

[0054] A further improvement solution is as follows: the outdoor garden operation vehicle further includes an identification module, a control system, and a reminder module;

[0055] The identification module is used to detect whether the main pedal is stepped on;

[0056] The control system includes an overall machine control module, a motor control module, and a battery management module. The overall machine control module, the motor control module, and the battery management module are connected by signals to each other. The battery management module is signal-connected to the power supply component, and the motor control module is signal-connected to the left drive motor and the right drive motor;

[0057] When the identification module detects that the main pedal is stepped on, it controls the left drive motor and the right drive motor to stop rotating through the control system, and sends a braking state reminder to the user through the reminder module.

[0058] A further improvement solution is as follows: The recognition module includes a microswitch disposed on the frame. A switch pressing plate is fixed on the rotating plate, and the switch pressing plate presses the microswitch when the main pedal is in the natural release state; when the user steps on the main pedal to drive the rotating plate to rotate, the switch pressing plate is separated from the microswitch, and at this time, the microswitch is triggered to control the left drive motor and the right drive motor to stop rotating.

[0059] A further improvement solution is as follows: A switch box is fixedly arranged on the fixed bracket, and the microswitch and the switch pressing plate are both installed in the switch box.

[0060] A further improvement solution is as follows: An adjusting nut is arranged between the threaded push rod and the rotating plate. The adjusting nut is connected to the rotating plate, the threaded push rod is threadedly connected to the adjusting nut, and one end of the threaded push rod away from the adjusting nut abuts against the foot brake pump.

[0061] A further improvement solution is as follows: It further includes a user seat connected to the vehicle frame.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] In the present invention, the connection between the foot pedal assembly and the foot brake pump is set as a labor-saving lever, and the brake disc is arranged on the non-output shaft of the reduction gearbox. By using the reduction ratio of the reduction gearbox, the force for the user to directly step on the pedal assembly does not need to be too large to generate sufficient braking force, solving the technical problem in the prior art that very strong force is required to achieve effective braking.

[0064] In the present invention, stepping on the main pedal can achieve braking, and stepping on the main pedal more forcefully can achieve parking. The switching between the braking and parking modes is more in line with the user's usage habits; when it is necessary to release the parking mode, only need to step on the auxiliary pedal, and the auxiliary pedal is integrated on one side of the main pedal, enabling the user to complete the operations of braking, parking, and releasing the parking mode with a single foot, and the overall operation is convenient.

[0065] In addition, in the present invention, the foot brake pump is floatingly installed on the vehicle frame through the oil brake force damping adjustment mechanism. When the user steps on the foot pedal assembly and the friction plate of the brake assembly completely abuts against the brake disc, the foot pedal assembly can still be stepped down by the user for a certain distance, so that the user does not feel the feedback of "too hard" during the entire process of stepping on the foot pedal assembly; and the damping member in the oil brake force damping adjustment mechanism has an initial damping force after assembly, which can make the pedal rebound force received by the user during the entire process of stepping on the foot pedal assembly increase gradually, and there will be no interval where the rebound force increases significantly, improving the overall braking feeling of the user. [Description of the Drawings]

[0066] The following further describes in detail the specific embodiments of the present invention with reference to the drawings:

[0067] Figure 1 is a perspective view of an outdoor gardening vehicle according to the first embodiment of the present invention;

[0068] Figure 2 is Figure 1 an exploded view of the brake module and the drive axle part in

[0069] Figure 3 is Figure 2 a perspective view of the foot pedal assembly and the oil brake pump part in

[0070] Figure 4 is Figure 2 an exploded view of the foot pedal assembly and the oil brake pump part in

[0071] Figure 5 is Figure 2 an exploded view of the foot pedal assembly in

[0072] Figure 6 is a perspective view of the brake slave cylinder in the present invention;

[0073] Figure 7 is a perspective view of the separation of the brake slave cylinder and the friction plate in the present invention;

[0074] Figure 8 is a connection block diagram of the identification module and the control system in the present invention.

[0075] Meanings of the reference numerals in the figure:

[0076] 1, frame; 2, user seat; 3, left drive wheel; 4, right drive wheel; 5, left drive axle assembly; 6, right drive axle assembly; 7, mowing component; 8, brake module; 801, main pedal; 802, sub-pedal; 803, sub-pedal torsion spring; 804, hook plate; 805, hook plate torsion spring; 806, limit rod; 807, rotating plate; 808, brake spring; 809, fixed bracket; 810, hydraulic pipe; 811, foot brake pump; 812, threaded push rod; 813, oil pump bracket; 814, bolt; 815, damping compression spring; 816, connecting plate; 817, adjusting nut; 818, micro switch; 819, switch pressing plate; 820, switch box; 821, three-way valve block; 822, brake slave cylinder; 8221, slave cylinder hydraulic cylinder; 8222, friction plate; 8223, slave cylinder rod; 823, brake disc; 824, floating mounting bracket. [Detailed implementation manners]

[0077] The terms used in the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. For example, the terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0078] Unless otherwise specified, the terms "arranged", "connected" and "coupled" in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. The "fixed connection" in the present invention should also be understood in a broad sense as integrally formed, welded or connected by other fasteners.

[0079] Please refer to Figures 1 to 8 , which shows an outdoor gardening operation vehicle according to a first embodiment disclosed by the present invention, including: a frame 1, a left drive axle assembly 5, a right drive axle assembly 6, a mowing component 7, a power supply component, and a braking module.

[0080] The left drive axle assembly 5 is mechanically connected to the left drive motor and the left drive wheel 3 for transmitting the power of the left drive motor to the left drive wheel 3; the right drive axle assembly 6 is mechanically connected to the right drive motor and the right drive wheel 4 for transmitting the power of the right drive motor to the right drive wheel 4. The mowing component 7 is arranged below the frame 1 for cutting the vegetation on the ground; specifically, the left and right drive wheels 4 are located at the rear of the mowing component 7. It should be particularly noted that: the mowing component 7 should not be narrowly understood as a mechanism that can only mow grass, and it can also be replaced with other functional components, such as snow sweeping, snow blowing and other components. Those skilled in the art should be able to adaptively replace various functional components without creative labor, and the above should all be included in the protection scope of this embodiment.

[0081] The power supply component is electrically connected to the left drive motor, the right drive motor and the mowing component 7 for supplying power to the left drive motor, the right drive motor and the mowing component 7. The power supply component selected in this embodiment is a battery pack; in other embodiments, a combination of an internal combustion engine and a storage battery can also be selected. In this form, the internal combustion engine burns fuel to charge the storage battery through a generator, and the storage battery then supplies power to the various components of the lawn mower.

[0082] Refer to the attached Figure 2, the braking module of this embodiment includes a braking and parking component and a foot brake pump 811; the braking and parking component includes a foot pedal component, which is hinged to the frame 1 and forms a lever with the foot brake pump 811. When the user steps on the foot pedal component, the foot brake pump 811 is triggered to generate a braking force on the left drive axle assembly 5 and the right drive axle assembly 6; in this embodiment, the foot pedal component and the foot brake pump 811 form a force-saving lever, and the ratio of the input force arm to the output force arm of the force-saving lever is 1-20:1 when the user steps on the foot pedal component, which can make it relatively labor-saving for the user to step on the foot pedal component.

[0083] Refer to the appendix Figure 2 , the braking module further includes: a hydraulic pipe 810, a left braking component, and a right braking component. The hydraulic pipe 810 connects the foot brake pump 811, the left braking component, and the right braking component. To effectively connect the above components, a three-way valve block 821 is generally provided; when the user steps on the foot pedal component, the foot brake pump 811 is triggered to generate a braking pressure, which acts on the left braking component and the right braking component through the hydraulic pipe 810 at the same time, generating a braking force on the left drive axle assembly 5 and the right drive axle assembly 6, so that the left drive wheel 3 and the right drive wheel 4 are braked; the stepping force for the user to step on the foot pedal component to achieve braking is 20N-500N.

[0084] Furthermore, the stepping force for the user to step on the foot pedal component to achieve braking is 30N-200N. That is, different degrees of braking effects can be achieved within the range of the stepping force of 30N-200N.

[0085] The left drive axle assembly 5 and the right drive axle assembly 6 are selected as a reduction gearbox of level 2 or above, and the reduction gearbox includes an input shaft, an output shaft, and an intermediate shaft; the left braking component and the right braking component are respectively arranged on the non-output shafts of the corresponding reduction gearboxes. The braking power of this embodiment comes from the user's stepping. If the braking component is arranged on the output shaft (i.e., the drive wheel shaft), the braking will be too hard. At this time, a great deal of force is required to generate a certain braking force, resulting in greater difficulty for the foot pedal to achieve effective braking. Therefore, generally, the braking component is not arranged on the output shaft.

[0086] In this embodiment, the left braking component and the right braking component are respectively arranged on the intermediate shafts of the corresponding reduction gearboxes, and there is a certain transmission ratio relationship between the input shaft, the intermediate shaft, and the output shaft. In other embodiments, the braking component can also be arranged on the input shaft, but this will cause the braking to be too sensitive, that is, a slight step on the foot pedal component can generate a large braking force, resulting in an emergency braking situation, and the user cannot accurately grasp the stepping force when hoping to slow down slowly.

[0087] Since the drive axle assembly may select a multi-stage reduction gearbox, the reduction ratio range of the intermediate shaft of the left brake assembly or the right brake assembly to the corresponding output shaft is set to 1 to 50. In this embodiment, the left drive axle assembly 5 and the right drive axle assembly 6 select a two-stage reduction gearbox, and the reduction ratio range of the intermediate shaft of the left brake assembly or the right brake assembly to the corresponding output shaft is set to 3 to 6. Since the outdoor gardening vehicle of this embodiment is provided with a mowing component 7, which is mainly used to realize the repair of the lawn, the curb weight of a common household gardening vehicle is about 200 Kg to 300 Kg, and the curb weight of a commercial gardening vehicle is about 500 Kg to 800 Kg; after calculation, if the brake disc 823 is arranged on the output shaft, the braking torque needs to satisfy 150 Nm ≤ T, and this torque is relatively strenuous for ordinary users. In the case of selecting a two-stage reduction gearbox in this embodiment, the braking torque arranged on the intermediate shaft only needs to satisfy 30 Nm ≤ T ≤ 100 Nm, and the force is relatively reasonable and easy to step on and control.

[0088] It should be specifically noted that: in other embodiments, if the mowing component 7 is replaced with other heavy functional components, resulting in a significant increase in the vehicle's overall mass, in order to make the stepping on the foot pedal assembly relatively labor-saving, the brake assembly should be arranged on the input shaft at this time, or a reduction gearbox with a larger reduction ratio should be selected and the brake assembly should be arranged on the intermediate shaft close to the input shaft.

[0089] Both the left brake assembly and the right brake assembly include a brake slave cylinder 822 installed on the corresponding drive axle assembly. The brake slave cylinder 822 includes a slave cylinder hydraulic cylinder 8221, a slave cylinder rod 8223, and a friction plate 8222. A brake disc 823 is fixedly connected to the shaft of the left brake assembly or the right brake assembly; when the user steps on the foot pedal assembly, the brake slave cylinder 822 squeezes the brake disc 823 to generate a braking force. During this process, the foot brake pump 811 is connected to the slave cylinder hydraulic cylinder 8221 through a hydraulic pipe 810 and provides a braking pressure. The slave cylinder rod 8223 moves relative to the slave cylinder hydraulic cylinder 8221 to drive the friction plate to move and squeeze the brake disc 823 to form a braking force.

[0090] Refer to the appendix Figures 6 to 7, in this embodiment, the number of cylinders of the brake caliper 822 is odd, that is, the brake assembly only has a hydraulic cylinder 8221 of the caliper on one side of the brake disc 823. Generally, a single brake assembly only includes one hydraulic cylinder 8221 of the caliper and one piston rod 8223 of the caliper. And the hydraulic cylinder 8221 of the caliper is slidably installed on the vehicle frame 1 or the corresponding reduction gearbox. The friction plate 8222 includes a dynamic friction plate and a static friction plate. The dynamic friction plate is fixed to the piston rod 8223 of the caliper and is located on one side of the brake disc 823, and the static friction plate is arranged on the other side of the brake disc 823. When the foot brake pump 811 provides braking pressure to the hydraulic cylinder 8221 of the caliper, the piston rod 8223 of the caliper pushes the dynamic friction plate and the static friction plate to press against the brake disc 823. In this process, the dynamic friction plate first contacts the brake disc 823, and then the piston rod 8223 of the caliper continues to move to drive the static friction plate to move towards the brake disc 823 until the two friction plates 8222 contact the brake disc 823 and generate braking force.

[0091] In other embodiments, the number of cylinders of the brake caliper 822 is even, that is, the brake assembly only has hydraulic cylinders 8221 of the caliper on both sides of the brake disc 823. Generally, a single brake assembly includes two hydraulic cylinders 8221 of the caliper located on both sides of the brake disc 823 respectively. The two friction plates 8222 are fixed to the piston rod 8223 and are located on both sides of the brake disc 823. When the foot brake pump 811 provides braking pressure to the hydraulic cylinders 8221 of the caliper, the piston rod 8223 of the caliper pushes the two dynamic friction plates to press against the brake disc 823. It should be particularly noted that if the positions of the two hydraulic cylinders 8221 of the caliper are fixed, it is necessary to accurately adjust the positions of the hydraulic cylinders 8221 of the caliper so that the distances from the two friction plates 8222 to the brake disc 823 are always equal, otherwise there will be a problem that the friction plate 8222 on one side cannot effectively resist the brake disc 823, resulting in a poor deceleration effect. To solve this problem, generally, the hydraulic cylinders 8221 of the caliper are slidably installed on the vehicle frame 1 or the corresponding reduction gearbox. At this time, the problem of accurately adjusting the positions of the hydraulic cylinders 8221 of the caliper can be avoided.

[0092] A floating mounting bracket 824 is fixed on the vehicle frame 1 or the corresponding reduction gearbox. The above-mentioned hydraulic cylinder 8221 of the caliper is slidably connected to the floating mounting bracket 824 to achieve the effect of floating installation of the hydraulic cylinder 8221 of the caliper on the vehicle frame 1.

[0093] The thickness of the brake disc 823 is 2 mm to 6 mm, the diameter of the brake disc 823 is 60 mm to 300 mm, the hydraulic pressure range of the brake caliper 822 is 2 Mpa to 40 Mpa, the piston stroke of the piston rod of the brake caliper 822 is 0.5 mm to 20 mm, the diameter of the piston rod of the foot brake pump 811 is 5 mm to 30 mm, the diameter of the hydraulic cylinder 8221 of the caliper is 5 mm to 40 mm, and the piston rod stroke of the foot brake pump 811 is 5 mm to 100 mm. The components with reasonable sizes jointly achieve an effective braking effect.

[0094] Refer to the appendixFigures 3 to 4 The brake parking assembly further includes a rotating plate 807 and a brake spring 808. The rotating plate 807 is rotatably connected to the vehicle frame 1. The foot pedal assembly is fixedly connected to the rotating plate 807. The two ends of the brake spring 808 are respectively connected to the vehicle frame 1 and the rotating plate 807. A threaded push rod 812 is connected to the rotating plate 807. When the user steps on the foot pedal assembly, the rotating plate 807 rotates and pulls the brake spring 808, pushing the threaded push rod 812 to squeeze the foot brake pump 811 and generate a braking force. In this embodiment, the brake spring 808 is selected as a brake pull spring. When the user steps on the foot pedal assembly, the rotating plate 807 rotates and stretches the brake pull spring, and the brake pull spring provides a pulling force to give the pedal assembly part of the restoring power.

[0095] In other embodiments, the brake spring 808 can also be selected as a brake torsion spring or a brake compression spring. When the brake torsion spring is selected, one end of the brake torsion spring rotates synchronously when the user steps on the foot pedal assembly to make the rotating plate 807 rotate; when the brake compression spring is selected, the rotating plate 807 rotates and compresses the brake compression spring when the user steps on the foot pedal assembly.

[0096] To facilitate the arrangement of the brake spring 808, the brake parking assembly of this embodiment further includes a fixed bracket 809 fixedly connected to the vehicle frame 1. The rotating plate 807 is rotatably connected to the fixed bracket 809. The two ends of the brake pull spring are respectively connected to the fixed bracket 809 and the rotating plate 807.

[0097] Refer to the appendix Figures 2 to 5 The foot pedal assembly includes a main pedal 801, a sub-pedal 802, a hook plate 804, and a hook plate torsion spring 805. A limit rod 806 is fixedly connected to the vehicle frame 1; the hook plate 804 is rotatably connected to the main pedal 801. When the main pedal 801 is stepped on by the user, the hook plate 804 can be hooked on the limit rod 806 to make the braking module in the parking state. The braking module in the parking state can continuously provide a large braking force. When the user releases the foot pedal assembly at this time, the state of the braking module will not change, and the whole vehicle will also remain in place under the action of the braking force; the hook plate torsion spring 805 is arranged on the rotating shaft of the hook plate 804 and is used to generate an elastic force on the hook plate 804 to keep it hooked on the limit rod 806 in the parking state, avoiding the hook plate 804 and the limit rod 806 from separating due to slight vibration; the maintaining force of the hook plate torsion spring 805 to maintain the contact between the hook plate 804 and the limit rod 806 is 5N to 30N. In this embodiment, the maintaining force of the hook plate torsion spring 805 to maintain the contact between the hook plate 804 and the limit rod 806 is 7N.

[0098] When the main pedal 801 moves under the user's stepping, at least one of the two surfaces where the hook plate 804 and the limit rod 806 first come into contact is a curved surface, and when the user steps on the main pedal 801 to make the hook plate 804 abut against the limit rod 806, the hook plate 804 can rotate until the inner side of the hook plate 804 bypasses the limit rod 806 and is hooked on the limit rod 806, thus realizing the parking action.

[0099] The auxiliary pedal 802 is movably connected to the main pedal 801. When the auxiliary pedal 802 is stepped on by the user, the hook plate 804 can be disengaged from the limiting rod 806. Specifically, when the auxiliary pedal 802 is stepped on by the user, it generates movement and presses the hook plate 804, causing the hook plate 804 to rotate away from the limiting rod 806 and disengage from the limiting rod 806. The maximum rotation angle of the hook plate 804 when the user steps on the auxiliary pedal 802 and drives the hook plate 804 from the state of hooking the limiting rod 806 to the state of disengaging from the limiting rod 806 is 5° to 30°.

[0100] In this embodiment, the auxiliary pedal 802 is rotatably connected to the main pedal 801, and the rotation angle range of the auxiliary pedal 802 when stepped on by the user is 0 to 90°.

[0101] In other embodiments, the auxiliary pedal 802 can also be slidably arranged on the main pedal 801, as long as it can drive the hook plate 804 to rotate and disengage from the limiting rod 806 when stepped on; the specific setting method is not limited to the above rotational or sliding connection relationship.

[0102] In this embodiment, the main pedal 801 and the auxiliary pedal 802 can be stepped on simultaneously or separately by a single foot, that is, the auxiliary pedal 802 is close to the main pedal 801. Generally, the auxiliary pedal 802 is arranged on one side of the main pedal 801. A torsion spring 803 for the auxiliary pedal is arranged at the hinge of the auxiliary pedal 802 and the main pedal 801. The torsion spring 803 for the auxiliary pedal enables the auxiliary pedal 802 to maintain a state of not pressing the hook plate 804 when not stepped on, avoiding the situation that the vehicle impacts the hook plate 804 when jolted by the outside or the user and the parking state is released. In this embodiment, the stepping force for the user to step on the auxiliary pedal 802 to disengage the hook plate 804 from the limiting rod 806 is 3N to 100N, and this stepping force is less than the force for stepping on the main pedal 801 to put the brake module 8 in the parking state.

[0103] Similar to the aforementioned brake spring 808, the hook plate torsion spring 805 and the auxiliary pedal torsion spring 803 in the present invention can also be replaced with a compression spring or a tension spring. Those skilled in the art can select the appropriate specific setting method according to the actual situation, which will not be elaborated.

[0104] Refer to the appendix Figures 2 to 5 , in this embodiment, the auxiliary pedal 802 is arranged at the rear side of the main pedal 801, that is, when the user steps on it, the front sole acts on the main pedal 801 and the heel acts on the auxiliary pedal 802; because the user generally tends to use more force with the front sole when stepping on, the stepping force on the main pedal 801 in this embodiment is greater than that on the auxiliary pedal 802, so this setting method is more in line with the user's habit.

[0105] Refer to the appendix Figure 8 , in this embodiment, the outdoor gardening operation vehicle further includes an identification module, a control system, and a reminder module;

[0106] The recognition module is used to detect whether the main pedal 801 is stepped on; the control system includes an overall machine control module, a motor control module, and a battery management module. The overall machine control module, the motor control module, and the battery management module are connected by signals to each other. The battery management module is connected to the power supply component by signal, and the motor control module is connected to the drive motor by signal; when the recognition module detects that the main pedal 801 is stepped on, it controls the left drive motor and the right drive motor to stop rotating through the control system, that is, the drive motor is linked with the brake module 8, avoiding the situation that the drive motor is still outputting power during braking, otherwise it will cause problems such as an increase in braking distance, overheating or even dry burning of the brake disc 823, and overheating of the drive motor; and a braking state reminder is sent to the user through the reminder module to remind the user that the current state is a braking state.

[0107] Reference appendix Figure 4 In this embodiment, the recognition module includes a micro switch 818 arranged on the frame. A switch pressing plate 819 is fixed on the rotating plate 807. The switch pressing plate 819 presses the micro switch 818 when the main pedal 801 is in the natural release state; when the user steps on the main pedal 801 to drive the rotating plate 807 to rotate, the switch pressing plate 819 is separated from the micro switch 818. At this time, the micro switch 818 is triggered to control the left drive motor and the right drive motor to stop rotating. In this embodiment, as long as the user steps on the main pedal 801 to cause it to rotate, it will inevitably cause the switch pressing plate 819 to be separated from the micro switch 818, so that the recognition module is triggered to control the drive motor to stop rotating.

[0108] A switch box 820 is fixedly arranged on the fixed bracket 809. The micro switch 818 and the switch pressing plate 819 are both installed in the switch box 820. The switch box 820 protects the micro switch 818 and the switch pressing plate 819, avoiding the generation of false signals caused by contact with external objects.

[0109] An oil brake force damping adjustment mechanism is arranged at the foot brake pump 811, which is used to enable the foot pedal assembly to be continuously stepped on when the hydraulic oil in the foot brake pump 811 is compressed to the limit; when the hydraulic oil in the foot brake pump 811 is compressed to the limit, the friction plate 8222 of the brake caliper 822 has been tightly pressed against the brake disc 823, and the piston rod in the foot brake pump 811 cannot be further squeezed and continue to move in the cylinder. If the damping adjustment mechanism is not set, when the hydraulic oil is compressed to the limit, the foot pedal assembly cannot be continuously stepped on, that is, the user will feel that the foot pedal assembly is "extremely hard", resulting in a poor stepping experience for the user. When the damping adjustment mechanism is set, after the hydraulic oil is compressed to the limit, continuous stepping will compress the damping adjustment mechanism, and the user can feel that the damping of stepping is getting larger and larger, but this damping force increases gradually and will not give the user a "too hard" foot feeling, improving the user experience.

[0110] The oil brake force damping adjustment mechanism includes an oil pump bracket 813 and a damping member. The damping member can produce elastic deformation when compressed. The oil pump bracket 813 is fixed to the vehicle frame 1, and the damping member is connected to the foot brake pump 811 and the oil pump bracket 813. When the hydraulic oil is compressed to the limit and the foot pedal assembly is continuously stepped on, the damping member deforms and applies a reverse elastic force to the foot brake pump 811.

[0111] The oil brake force damping adjustment mechanism further includes a guiding member connected to the foot brake pump 811. The guiding member is used to limit the foot brake pump 811 to reciprocate only in the direction of being extruded by the foot pedal assembly. The function of the guiding member is to prevent the foot brake pump 811 from deflecting during movement, ensure that all components move in a predetermined direction, and avoid abnormal force conditions caused by deflection.

[0112] In this embodiment, the damping member is selected as a damping compression spring 815, and the guiding member is selected as a bolt 814. The bolt 814 sequentially passes through the foot brake pump 811 and the damping compression spring 815 and is threadedly connected to the oil pump bracket 813. The foot brake pump 811 and the bolt 814 are slidably sleeved on the bolt 814, and the bolt 814 limits the maximum distance between the foot brake pump 811 and the oil pump bracket 813. The damping compression spring 815 is arranged between the foot brake pump 811 and the oil pump bracket 813. When the extrusion force of the threaded push rod 812 on the foot brake pump 811 is greater than the elastic force of the damping spring, the damping spring is further compressed, and the foot brake pump 811 can move relative to the oil pump bracket 813.

[0113] After the damping member is assembled, it has an initial damping force, which is slightly less than the extrusion force of the threaded push rod 812 on the foot brake pump 811 when the vehicle is exactly fully braked (i.e., when the hydraulic oil is not compressed at all). That is, in the stage from starting to step on the foot pedal assembly to the complete compression of the hydraulic oil, the damping member has already started to deform; and when the foot pedal assembly is continuously stepped on after the complete compression of the hydraulic oil, only the damping member continues to deform, and the reaction force given to the user's foot by this deformation increases linearly, so that the stepping force of the user from starting to step on the foot pedal assembly to finally being unable to step on is always gradually increasing, and there will be no situation where the stepping force needs to increase sharply in a certain state to continue stepping on the foot pedal assembly, thereby further improving the user's foot feeling.

[0114] When the main pedal 801 is in the natural release state, the brake compression spring is in state 1. When the hook plate 804 is hooked on the limit rod 806, the damping compression spring 815 is in state 2. The compression amount of the damping compression spring 815 in state 2 is greater than that in state 1. The difference in the compression amount of the damping compression spring 815 between state 2 and state 1 is 1 mm to 60 mm. This difference in compression amount is the moving distance of the foot brake pump 811. The reasonable distance range is also to improve the user's foot feeling.

[0115] In other embodiments, various damping members such as torsion bar springs, air springs, oil-gas springs, rubber springs, etc. can also be selected. The guiding function of the guiding member can also be realized through guide rails or other limiting means. The setting method is similar to that of the aforementioned brake spring, and those skilled in the art can perform simple adaptive assembly according to requirements to achieve the above effects.

[0116] An adjusting nut 817 is provided between the threaded push rod 812 and the rotating plate 807. The adjusting nut 817 is connected to the rotating plate 807. The threaded push rod 812 is threadedly connected to the adjusting nut 817. One end of the threaded push rod 812 away from the adjusting nut 817 abuts against the piston rod of the foot brake pump 811. The threaded push rod 812 has a certain threaded portion. By cooperating with the adjusting nut 817, the position of the threaded push rod 812 relative to the rotating plate 807 can be adjusted, so as to reduce the dead stroke caused by mechanical cumulative error and greatly shorten the response time of the brake pump. Referring to the accompanying drawings, in order to facilitate the installation of the adjusting nut 817, a connecting plate 816 is provided on the rotating plate 807 in this embodiment. The adjusting nut 817 is rotatably connected to the connecting plate 816. Rotating the adjusting nut 817 can adjust the length of the threaded push rod 812 screwed into the connecting plate 816 and shorten the response time of the brake pump.

[0117] In the first embodiment of the present invention, the outdoor garden working vehicle further includes a user seat 2 connected to the vehicle frame 1 for the user to sit on rather than stand during driving, which facilitates the user to release their feet and use them to step on the foot pedal assembly.

[0118] Furthermore, in other embodiments, the outdoor garden working vehicle further includes a standing pedal connected to the vehicle frame 1 for the user to stand on during driving, and at this time, the user has a better view.

[0119] The present invention is not limited to the above specific embodiments. Those of ordinary skill in the art can easily understand that there are many alternative solutions for the dust collection device of the present invention without departing from the principles and scope of the present invention. The protection scope of the present invention shall be subject to the content of the claims.

Claims

1. An electric outdoor gardening vehicle, characterized in that, Including: Frame; Left drive axle assembly and right drive axle assembly. The left drive axle assembly is mechanically connected to the left drive motor and the left drive wheel, and is used to transmit the power of the left drive motor to the left drive wheel; the right drive axle assembly is mechanically connected to the right drive motor and the right drive wheel, and is used to transmit the power of the right drive motor to the right drive wheel; Mowing component, arranged below the frame and used to produce a cutting effect on the ground vegetation; Power supply component, electrically connected to the left drive motor, the right drive motor and the mowing component, and used to supply power to the left drive motor, the right drive motor and the mowing component; Brake module, including a brake parking assembly and a foot brake pump; The brake parking assembly includes a foot pedal assembly. When the foot pedal assembly is stepped on by a user, it squeezes the foot brake pump and generates a braking force on the left drive axle assembly and the right drive axle assembly.

2. The electric outdoor gardening vehicle according to claim 1, characterized in that: An oil brake force damping adjustment mechanism is arranged at the foot brake pump, and is used to enable the foot pedal assembly to be continuously stepped on when the hydraulic oil in the foot brake pump is compressed to the limit.

3. The electric outdoor gardening vehicle according to claim 2, characterized in that: The oil brake force damping adjustment mechanism includes an oil pump bracket and a damping member. The oil pump bracket is fixed to the frame, and the damping member is connected to the foot brake pump and the oil pump bracket.

4. The electric outdoor gardening vehicle according to claim 3, characterized in that: The oil brake force damping adjustment mechanism further includes a guiding member connected to the foot brake pump. The guiding member is used to limit the foot brake pump to reciprocate only in the direction of being squeezed by the foot pedal assembly.

5. The electric outdoor gardening vehicle according to claim 4, characterized in that: The damping member is selected as a damping compression spring, and the guiding member is selected as a bolt. The bolt sequentially penetrates the foot brake pump, the damping compression spring and is threadedly connected to the oil pump bracket.

6. The electric outdoor gardening vehicle according to claim 5, characterized in that: The damping member has an initial damping force after assembly.

7. The electric outdoor gardening vehicle according to claim 1, wherein: A limiting rod is fixedly connected to the frame. The foot pedal assembly includes a main pedal, a hook plate and a hook plate torsion spring. The hook plate is rotatably connected to the main pedal. When the main pedal is stepped on by a user, the hook plate can be hooked on the limiting rod to make the brake module in a parking state. The hook plate torsion spring is arranged on the rotating shaft of the hook plate and is used to generate an elastic force on the hook plate to keep it hooked on the limiting rod in the parking state.

8. The electric outdoor gardening vehicle according to claim 7, wherein: When the main pedal is stepped on by a user, at least one of the two surfaces where the hook plate and the limiting rod come into contact first is a curved surface, and when the user steps on the main pedal to make the hook plate abut against the limiting rod, the hook plate can rotate until the inner side of the hook plate bypasses the limiting rod and is hooked on the limiting rod.

9. The electric outdoor gardening vehicle according to claim 7, wherein: The maintaining force of the hook plate torsion spring to maintain the contact between the hook plate and the limiting rod is 5N to 30N.

10. The electric outdoor gardening vehicle according to claim 7, wherein: When the main pedal is in the natural release state, the damping compression spring is in state 1. When the hook plate is hooked on the limiting rod, the damping compression spring is in state 2. The compression amount of the brake compression spring in state 2 is greater than that in state 1; the difference in the compression amounts of the damping compression spring between state 2 and state 1 is 1mm to 60mm.

11. The electric outdoor gardening vehicle according to claim 7, wherein: The foot pedal assembly further includes a sub-pedal. When the user steps on the sub-pedal, the brake module can be released from the parking state. The main pedal and the sub-pedal can be stepped on simultaneously or separately with a single foot.

12. The electric outdoor gardening vehicle according to claim 11, wherein: The sub-pedal is movably connected to the main pedal. When the sub-pedal is stepped on by a user, it moves and squeezes the hook plate, causing the hook plate to rotate away from the limiting rod and disengage from the limiting rod. The maximum rotation angle of the hook plate when the user steps on the sub-pedal to drive the hook plate from the state of being hooked on the limiting rod to the state of disengaging from the limiting rod is 5° to 30°.

13. The electric outdoor gardening vehicle according to claim 12, characterized in that: The auxiliary pedal is rotatably connected to the main pedal, and the angle range for the user to step on the auxiliary pedal to rotate it is 0 to 90°; an auxiliary pedal torsion spring is provided at the hinge joint between the auxiliary pedal and the main pedal, and the auxiliary pedal torsion spring keeps the auxiliary pedal in a state of not squeezing the hook plate when not stepped on.

14. The electric outdoor gardening vehicle according to claim 11, characterized in that: The braking and parking assembly further includes a rotating plate and a braking spring. The rotating plate is rotatably connected to the vehicle frame, the foot pedal assembly is fixedly connected to the rotating plate, both ends of the braking spring are respectively connected to the vehicle frame and the rotating plate, and a threaded push rod is connected to the rotating plate. When the user steps on the foot pedal assembly, the rotating plate rotates and pulls the braking spring, pushing the threaded push rod to squeeze the foot brake pump and generate a braking force.

15. The outdoor gardening operation vehicle according to claim 7, characterized in that: The outdoor garden working vehicle further includes an identification module, a control system, and a reminder module; The identification module is used to detect whether the main pedal is stepped on; The control system includes an overall machine control module, a motor control module, and a battery management module. The overall machine control module, the motor control module, and the battery management module are signal-connected to each other. The battery management module is signal-connected to the power supply component, and the motor control module is signal-connected to the left drive motor and the right drive motor; When the identification module detects that the main pedal is stepped on, it controls the left drive motor and the right drive motor to stop rotating through the control system, and sends a braking state reminder to the user through the reminder module.

16. The outdoor gardening work vehicle according to claim 15, wherein: The identification module includes a microswitch provided on the frame, and a switch pressing plate is fixed on the rotating plate. The switch pressing plate presses the microswitch when the main pedal is in the natural release state; when the user steps on the main pedal to drive the rotating plate to rotate, the switch pressing plate is separated from the microswitch, and at this time the microswitch is triggered to control the left drive motor and the right drive motor to stop rotating.

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