Riding mower with safety circuit protection measures

Abstract

The invention relates a riding mower with safety circuit protection measures, in particular to a riding mower with additionally-set safety circuit protection measures, noise reducing measures and hydraulic stepless speed change. The safety circuit mainly comprises a single board computer, a plurality of instrument plug-in units, buzzers, fuses, headlamps, a seat switch, a hung grass collecting box switch and a grass-filled alarm switch, wherein the headlamps are formed by combining a plurality of light emitting diodes in parallel; the plurality of light emitting diodes are arranged along the arc sector surfaces so as to benefit the enlarge of visual angle; the seat switch (S3) is unconventionally designed by adopting a new concept without being suddenly connected or broken; when people leave from the seat, the new seat switch can be immediately broken off; the seat switch (S3) mainly comprises a long sliding bar (S3-1) and a carbon brush (S3-2) of a guide rail matched with the long sliding bar; and several buzzers for alarming are arranged so as to obtain the expected safety effect.

Description

technical field [0001] The invention relates to a riding lawn mower used for mowing lawns in courtyards, parks, roadsides, and sports places. Take the lawn mower. Background technique [0002] Lawn mowers are widely used to mow grass in the manner chosen by people. Due to the poor maneuverability of the hand-push lawn mower, and when mowing in practice, due to the narrow cutting width at the front of the lawn mower, the phenomenon of repeated cutting and missing cutting often occurs, and it is necessary to re-cut and operate. Mowing grass on foot is very hard work. If you use a mount type, also called a riding lawn mower, you will feel different when sitting than standing, but the noise is louder. If a person suddenly leaves the seat, the original 3-second protection; but at 3 meters per second, it is still dangerous to break through 9 meters. [0003] The muffler is widely used as a muffler for internal combustion engines, especially small gasoline engines, and is insta...

AI Technical Summary

Problems solved by technology

[0008] Riding lawn mowers with safety circuit protection measures are riding lawn mowers with noise reduction measures and hydraulic stepless variable speed with additional safety circuit protection measures, including safety circuit protection measures, and can be connected to the two front wheels Steering front axle, drivable rear axle with hydraulic continuously variable transmission connecting the two rear wheels, frame with double bumpers above the four wheels, noise-reducing lawn mower under the frame, The front engine with noise reduction groove, the noise reduction head cover (1) and the noise reduction air filter (4), the rear part of the upper middle of the frame has a noise reduction seat, and the rear of the car has a noise reduction Grass collection box, and the personal protection accessories of the mount operator include earplugs, anti-sound cotton, earmuffs and anti-sound helmet; it is characterized in that: at the joint of the noise-reducing head cover 1 and the noise-absorbing air filter 4, There are two car lights 3, not only to pay attention to the adhesive seam not to leak too much sound, but also to pay attention to the temperature rise, if the lights are LED light-emitting tubes, the temperature rise is no problem; when it comes to lights, it is necessary to talk about the circuit; for safety , on the riding lawn mower, safety circuit protection measures must be installed. The safety circuit is mainly composed of single-board computer and instrument plug-in (C4), engine plug-in (C1), extension plug-in (C5), ignition switch (C2 ), battery (B1), DC relay (C3), power output PTO switch (C6), electromagnetic clutch (C7), starter (ST), hanging box buzzer (U1), full grass buzzer (U2) , the first insurance (F1), the second insurance (F2), the headlight switch (S0), the left headlight (L1), the right headlight (L2), the parking switch (S1), the N gear switch (S2) , seat switch (S3), hanging grass box switch (S4), full grass alarm switch (S5) is made up of, described left headlight (L1) and right headlight (L2), each by a plurality of, for example 4 A series of light-emitting diodes can also be added, or a plurality of light-emitting diodes can be connected in series and parallel, for example, 4 strings and 4 parallels are composed of 16 tubes, and it is better to arrange multiple tubes along the arc fan to facilitate Enlarge the range of viewing angles; the seat switch (S3) is now a new unconventional design; because of the original seat switch, although the seat switch was disconnected when the seat was not seated, when the driver sat down After the driver leaves the seat, there is a 3-5 second delay flameout control of the single-board computer, which sounds like it is very safe, but it is not; the original seat switch is a long-term problem that is difficult to solve The problem is that during the actual operation, the grass is bumpy, the buttocks are shaking, the seat is up and down, and the seat switch is on and off, especially when the driver accidentally falls, there is a 3-5 second stand-alone Delay flameout control, wait for 3-5 seconds before flameout; the lawn mower travels at a speed of 3.6 to 15 km / h, even if the slowest speed is one meter per second, it must rush out 3-5 meters, or more than ten meters It is not difficult to imagine what this means to falling hands, feet or obstacles; although it is customary to use a stand-alone delay flameout control of 3-5 seconds under normal circumstances, in order to eliminate unsafe hidden dangers, a new A reliable and inexpensive seat switch of an unconventional design is conceived. The seat switch must be safe. When the seat shakes up and down greatly, the seat switch cannot be turned on and off. Will be disconnected immediately in 0.1 second; The seat switch provided by the present invention has solved this long-standing problem; See Figure 28 , the seat switch (S3) mainly consists of a long slide bar (S3-1) located under the seat (9), and a carbon brush (S3-2) located on a guide rail matched with the long slide bar , and the seat spring (9-2), the position shown in the figure is a schematic cross-sectional view when the seat switch is just disconnected; because the seat (9) is equipped with a long slide bar (S3-1), which is inserted into the guide rail and Cooperate with the carbon brush, so the long slide bar (S3-1) is inserted and pulled out as the seat (9) moves up and down; the long slide bar S3-1 is in the shape of a long rod, and if its section is curved , such as circular, or tubular, the end face of the carbon brush (S3-2) matching the arc-shaped section of the long slide bar should also be arc-shaped; and if the long slide bar The section is square, such as square, polygonal, angle iron, channel steel, then the end face of the carbon brush (S3-2) matching the flat section of the long slide bar should also be flat , so that the matching place has good electrical contact; note that the middle part of the long slide bar (S3-1) is a conductor, such as copper, and the two ends are insulators, such as plastic, and the conductor is provided with The soft wire is connected to one terminal of the switch (S3); and the carbon brush is also provided with a soft wire to be connected to the other terminal of the switch (S3); a return spring is provided behind the carbon brush; Because of the follow-up of the long slide bar (S3-1) and the seat (9), it can be reset by the seat spring (9-2) installed under the seat 9. The lower end of the rod is provided with an auxiliary return spring; so when a person sits on the seat, although the length of the long rod-shaped conductor of the long slide bar (S3-1) inserted and pulled out is very large, the long rod-shaped conductor and the carbon The brush is always in good contact; and when the person leaves the seat, the long bar-shaped conductor of the long slide bar (S3-1) is pulled up immediately under the full force of the seat spring (9-2), and its When the amplitude is greater than the swaying amplitude area where people sit, the long rod-shaped conductor is disconnected from the carbon brush, and only the insulating part of the long slide rod is in contact with the carbon brush; the long rod of the long slide rod (S3-1) There should be no steps or unevenness at the junction of the shaped conductor and the insulating part of the lower part of the long slider. After forming, it is best to do machining, such as turning and milling or other processing methods, so as to facilitate sliding without jamming; The M and G of the switch (C2) are connected, the main circuit is short-circuited, and the No. 2 black line of the single-board computer and the instrument plug-in (C4) and the engine plug-in (C1) are short-circuited, causing the gasoline engine to stall; in the running state, the ignition The B and L of the switch (C2) are connected, the main circuit is connected, the single-board computer and the instrument plug-in (C4) are energized through the No. 5 blue line, and the first terminal of the engine plug-in (C1) inputs high level, so that the The solenoid valve of the carburetor of the engine acts to open the throttle switch; when the throttle gear is in the N gear position, the N gear switch (S2) is disconnected, and the instrument display light is on; in the parking state, the parking switch (S1) is turned off , the display light N on the instrument is on; when the seat is not seated, the seat switch (S3) is turned off, and the display light P on the instrument is on; if the grass collecting box is not hung, the hanging grass box switch (S4) is off open, the grass box warning light is on, and the buzzer (U1) emits a continuous alarm sound; when the voltage of the battery (B1) is insufficient, the voltage connected to the main circuit is too low, and the battery indicator light is on; when the front light is closed When the light switch (S0) is on, the headlights are on; in the starting state, B, L, and S of the ignition switch (C2) are connected, the main circuit is connected, and the running functions can be realized; the dark red wire at the S terminal is connected to the single The No. 4 line terminal of the board computer and the instrument plug-in (C4), and receives the high-level signal of the No. 4 line terminal through the control of the single-board computer, controls the output high-level signal of the No. 3 line terminal, and connects to the DC relay to make the DC relay (C3) is turned on, and the power flows into the starter (ST) through the DC relay. The starter (ST) is a DC motor installed on the engine, which drives the engine main shaft to start rotating through the transmission mechanism, so that the gasoline engine Start; start control is determined by the single board computer to determine whether it meets the following five starting conditions: 1. The accelerator is in the N position, and the N position switch is disconnected, resulting in the line 7 failing to form a loop through the N position switch; 2. The left end of the power output PTO switch (C6) is closed. Because the PTO switch is always one set of switches normally open and one set of switches is normally closed, the position in the figure is that the left end of the switch (C6) is closed and the right end is off. At this time, the cutter does not work when it is separated. , the blue line at the end of Line 11 forms a loop through the output of the PTO switch at the left end of the PTO switch (C6); 3. The seat is seated, the seat switch is closed, and the orange line at the end of Line 8 forms a loop through the output of the seat switch; 4. Vehicle When the car is parked, the parking switch S1 is closed, and the purple line at terminal 6 passes through the output of the parking switch to form a loop; 5. When the grass collection box or the rear cover is hung, press the grass collection box switch (S4), The dark red line at the end of line 9 forms a loop through the switch of the grass box; therefore, when the ignition switch is on, the dark red line at the end of line 4 inputs a high-level signal to the instrument plug-in, and the single-board computer judges whether it meets the above requirements. The 5 signal requirements, if met, will output a high level on the purple line of the No. 3 terminal, so that the DC relay (C3) is turned on, and the starter works; flameout control: flameout control after the vehicle is running; there are 5 kinds of signals Or 5 kinds of flameout signals; Signal 1. Parking switch, when not in the parking state, the parking switch is OFF and disconnected, the No. 6 purple line fails to form a loop output, and the parking state is reversed; Signal 2. N gear switch, throttle gear When the position is not in the N position, the N position switch is 0N closed, and the gray line at the end of line 7 forms a loop output, and vice versa in the N position; signal 3. Seat switch, when the seat is not seated, the seat switch (S3) is disconnected , the orange line at the end of line 8 fails to form a loop output, and the seat is seated, otherwise; The warning light of the grass collection box is on, and the buzzer U1 emits a continuous alarm sound. The dark red line terminal of No. 9 fails to form a loop output, and the opposite is true when the grass collection box or the rear cover is hung; signal 5. Power output PTO switch (C6) , because the PTO switch is always one group of switches normally open and one group of switches normally closed, the position on the figure is the state of the left end of the switch (C6), at this time the cutter is separated and does not work, the blue line at the end of line 11 passes through the PTO switch (C6 ) the left end cutter switch PTO output forms a loop; and when the left end of the PTO switch (C6) is not closed and the right end is closed, the electromagnetic clutch (C7) pulls in, the cutter is combined, and the blue line at the end of line 11 passes through the left end of the PTO switch (C6). The knife switch PTO output fails to form a loop, and the cutter working display light on the instrument is on at this time; 5 kinds of flameout signals are; 1. Among the above 5 signals, when the PTO is started, the cutter is combined, and the seat is not seated, the engine is delayed 3-5 seconds to turn off the engine; 2. Among the above 5 signals, if the grass collection box or the rear cover is not hung properly, the warning light of the grass collection box is on, and the buzzer U1 emits a continuous alarm sound, and the engine is immediately turned off; 3. The above 5 In the first signal, when the vehicle is parked, the parking switch (S1) is closed, the left end of the PTO switch (C6) is not closed, and when the right end is closed, the electromagnetic clutch (C7) is closed, the cutter is combined, and the single board computer stops the engine immediately. ; 4. Among the above 5 signals, if the seat is not in the N position and the seat is not seated, the engine will be delayed for 3-5 seconds to turn off; 5. Among the above 5 signals, when the accelerator position is in the N position, the In the parking state, if the seat is not seated, the engine will be delayed for 3-5 seconds to turn off; when the vehicle meets one or more of the above-mentioned turn-off signals, the above-mentioned signals will be judged by the single-board computer, and then controlled by a relay, so that The black line at the end of line 2 is short-circuited, even if the output of the flameout line of the engine plug-in C1 is grounded, the gasoline engine will be flamed out, and the delay time is realized through the delay subroutine of the single-board computer

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