CN210580056U - Pull rod heightening disc inhaul cable linked mower - Google Patents

Abstract

The shifting rod heightening disc is a grass cutter linked by a guy cable, a heightening shifting rod (25) and a heightening disc (26) are arranged between a chassis and wheels, the heightening shifting rod (25) is elastic and is provided with a rectangular notch so as to shift to any one of a plurality of gears arranged on the heightening disc (26), and the gears are formed by cutting two long sides of the punched rectangular notch and forming bulges which are rectangular in front view and arc in side view; the heightening shift lever (25) is also provided with a pull rope (27) so as to be connected to the pull rope reel in a gathering way to control heightening. The wheels of the mower are polygonal wheels (24), when the mower walks, the mower can be linked with the mowing knife to mow and cut wavy patterns to beautify the lawn by rolling up and down. The lock body (16) is provided with a section of climbing surface (16a) from low to high, which is a catenary and is provided with a plurality of balls, thus having remarkable effect.

Description

Pull rod heightening disc inhaul cable linked mower

Technical Field

The invention relates to a lawn mower for trimming lawns in courtyards, parks, beside roads and other places, which is a dual-purpose lawn mower bottom poking-cutting grass discharge channel mechanism combining noise elimination and metal post-treatment on the basis of an improved push mower bottom poking-up grass-blocking mechanism for cleaning a grass discharge channel and an improved mower bottom rear shaft automatic cleaning grass discharge channel mechanism, wherein the dual-purpose lawn mower bottom poking-cutting grass discharge channel mechanism can realize noise elimination, noise reduction, part wear resistance, gear transmission driven by an engine and direct motor transmission; a three-wheel mower with a grass mowing head for heightening a front single wheel by shifting a flat rod rotation angle, a series-excited motor electric mower with a chassis anti-collision safety belt function wave disc brake, a mower with a grass pushing and blocking device and a grass breaking prevention device which are arranged in the middle of a mower chassis and provided with the function wave disc brake and a motor driving gear, a mower with a rolling lock for adjusting a universal wheel in a rotating mode, a mower with a folding handrail and a vertical folding handrail with a grass collecting box bag, a mower with a bent handrail and an easy-to-take grass collecting box, and a mower with a pull rod for heightening the front single wheel in a pulling and pulling rope linkage mode for cutting wavy patterns on the basis of the mower with the bent handrail and the mower with the easy-to-take the grass collecting box and the mower with the easy-to-take one side grass discharging plate.

Background

Lawn mowers are widely used to mow grass in a manner selected by one's preference. When some operating pedestrians like and are used to the mower, the upper handrail of the rear half part has a slightly larger strength and has a feeling of leaning and pressing down, so that the possibility of tilting and hanging the front wheel is increased invisibly; the design of the mower should also take care of the comfort and convenience of the user as much as possible. The mower using the gasoline engine has less front warping due to heavier engine. However, the front warp phenomenon, particularly the front warp phenomenon of the left front wheel, also occurs. For an electric mower, because the motor is lighter than the engine, and the center shaft of the motor drives the mowing knife with a large rotating diameter and cannot be installed far forward, the front wheel of the electric mower is lifted more frequently. Furthermore, according to the relevant standards, for example, GB 4706.78-2005; IEC 60335-2-77-2002; the EN836-1997 standards, especially EN 836/A3-2004/4.2.3.2.1-4.2.3.2.3.3, all have specification requirements of 16.7 degrees of slope. The sand kettle with the balance weight is added at the front part of the whole machine, the chassis is required to be changed for installation, three hole sites and sand stones are required to be added, and the operation is troublesome; the counterweight is heavy, and the transportation cost is also high. The front wheels are stiff and hard to turn.

In addition, the common grass trimmer does not need a knife, and a string excited motor drives a grass trimming head with nylon wires. When the grass trimmer is assembled and started to rotate the nylon thread in the reel, grass can be cut. When the thread is short, an operator presses the button, the aluminum head of the winding wheel collides with the ground, the spring of the winding wheel is compressed, the winding wheel rotates, and the nylon thread in the winding wheel passes through the thread eye inserting piece to be paid off. The excess length of thread paid out is trimmed by the blade. When not in use, the blade is sleeved on the blade, thereby having the protection function. The grass cutting head has good grass cutting effect and saves electricity compared with a knife, but cannot be arranged on a common grass cutter with wheels because of the need of pressing and paying off the grass by a pier. Can one wheel of a typical four-wheel mower be omitted, making turning and reversing more flexible? How are the cut grass crowded at the grass discharge port, wound and blocked, and how can grass discharge smoothly? The lawn mower is not easy to walk straight only by the front universal wheel; how can a lawn mower be long and save space without dismantling the lawn mower? Can the mower fold the handrail upright? The armrest is usually a straight rod higher than the straw collecting box bag and has a cross rod which makes the straw collecting box bag difficult to take out; can use a simple elastic inward-folded mower with handrails without using tools? The conventional side grass discharging plate is an additional separate component, and when the side grass discharging plate is not used, the side grass discharging plate needs to be detached independently and is not placed at a proper position for storage, when the side grass discharging plate needs to be used, the side grass discharging plate needs to be found and installed again, and whether the side grass discharging plate needs to be detached independently or not is difficult to enter a packing box because the side grass discharging plate extends out of a very occupied space of a machine body chassis from the right side, and whether a mower which is easy to place by turning up one side grass discharging plate can be developed? The problem that the wavy patterns need to be cut by the wheel control and the height needs to be adjusted is old and difficult.

The invention has the innovative concept of wandering for a long time like ghost, and has a fortunate chance by taking reference to the related experience and repeated exploration in Europe for many years. If a device is imagined, such as a central pull wire pulling rotating rod, if the aluminum head of the reel can be used for paying off, a light grass cutting head can be adopted on the lawn mower, so that the electricity is saved; if the balance weight does not use a sand pot or an improved water tank, a storage battery, preferably a free-access winder, is arranged on the lawn mower; the damping of the original winder is sometimes unreliable, and the occasional failure of the winder is known to be a world problem; fortunately, the winding device which is just worked out and stops along with pulling can be used as a winder, so that the novel offset series excitation motor electric mower is a mower with a grass mowing head and the winder, and is worked out firstly. The comprehensive effects of the fertilizer are that the application range is expanded, the soil moisture conservation and safety of the pressed grass are enhanced, and the oil and the environment are saved.

Although the mower stops rotating within three seconds, the reliability of the original brake is not durable; the belt wheel still slips due to the braking motor; some radial centrifugal throwing blocks do not have multiple teeth, and although the test is passed, the radial centrifugal throwing blocks slip after long-term polishing; during the braking process, the radial direction still has the centrifugal blocking effect, and if the radial direction is changed into the axial direction, the braking is fast without the centrifugal blocking; the original brake wants to be suddenly locked, but is unfavorable because of accumulated energy, if the brake is changed into a slack brake, the brake is good, and the function wave disc brake intermittently looses the energy to facilitate the braking, and prolongs the service life of the friction block. Steel hard objects are sometimes hidden in the lawn, and the lawn mower is occasionally damaged by the steel hard objects or overturned; if the outer rubber coating of the movable support is collided in the front direction, the sliding rod of the movable support retracts to trigger the limit switch, and collision avoidance can be facilitated. The anti-collision safety and brake ensuring function, the grass blocking mechanism for clearing the lower shifting upper cutting of the grass discharging channel of the grass mower is always a long-standing problem, and the grass can not be discharged because the rear shaft is reverse.

Why is a reel used? Because of the long electric wires scattered on the ground, when the electric mower mows repeatedly, the electric mower is sometimes stepped on by feet or pressed by wheels carelessly, which affects safety; sometimes, the electric wires are knotted or tangled, so that the wires are not long enough to suspend mowing, or the wires are manually removed, and potential safety hazards are increased. Why is the reel attached to the electric mower? People who use the electric mower know that grass leakage often occurs during mowing, and the grass is required to be re-mowed, and particularly, when the environment is complicated and trees are mixed in the lawn, the grass is required to be repeatedly mowed for a plurality of steps and a plurality of times; if the reel is placed at a long distance, the electric wire near the mower cannot be pulled and stopped at any time to synchronously enter and exit, or the electric wire can fall on the ground in a soft wadding manner, so that the electric wire is in danger of being stepped or pressed by wheels, or the electric wire cannot enter and exit in time. The reel is installed on the electric mower, not only for replacing the balance weight, but also for freely advancing and retreating, the reel is installed at the front part and the middle part of the mower, the outlet is higher than the ground, so the reel is not easy to step or be pressed by a wheel. The three-wheel mower with the grass cutting head heightening the front single wheel by shifting the rotation angle of the flat rod, the series-excited motor electric mower with the chassis anti-collision safety device and the function wave disc brake, and the lawn mower with the anti-collision safety device arranged at the front part of the mower chassis, the function wave disc brake arranged at the middle part of the mower chassis, the grass pushing and blocking device with the motor driving gear and the grass breaking preventing device are provided, and the problems that cut grass is crowded at a grass discharge port, wound and blocked, generates heat by friction, and cannot be smoothly discharged are all left. Aiming at various lawn mowers for trimming lawns in places such as courtyards, parks, sides of roads and the like, a grass blocking mechanism which is arranged below and above a grass discharge channel and is cleaned by a hand-push mower is provided, CN 201610354881.6; a mechanism for automatically cleaning and arranging the grass channel at the rear shaft of the bottom of the mower is also disclosed, CN 201610352560.2; although the straw discharging device has a certain straw discharging function, the blade edge is not wear-resistant, becomes dull and cannot cut due to serious winding and blocking sometimes, the deflector rod cannot be poked or the blade is broken, and a transmission belt and a transmission gear slip or block; another serious problem is that the muffled noise is hard to hear, and the noise elimination and reduction are urgently needed. How to combine the noise elimination and the metal post-treatment, improve the noise elimination and the noise reduction and the wear resistance of parts, and ensure that the bottom grass poking and cutting and discharging channel mechanism of the dual-purpose lawn mower which can drive the gear transmission by an engine and can directly drive by the motor is the bottom grass poking and cutting and discharging channel mechanism of the dual-purpose lawn mower which can realize the noise elimination and the metal post-treatment, thereby being suitable for lawn mowers of various types and electric intelligent lawn mowers; the universal wheel without the rolling lock is difficult to directly walk in a long distance; the conventional side grass discharging plate is an additional separate component, and when the side grass discharging plate is not used, the side grass discharging plate needs to be detached independently and is not placed at a proper position for storage, when the side grass discharging plate needs to be used, the side grass discharging plate needs to be found and installed again, and whether the side grass discharging plate needs to be detached independently or not is difficult, and because the side grass discharging plate extends out of a very occupied space of a machine body chassis from the right side and is difficult to enter a packing box, a mower which is easy to place by turning up one side grass discharging plate can be developed? The development of a mower with a side grass discharge plate which can be easily turned upwards and a mower with a shifting lever and a heightening disc linked by a guy cable is a long-standing problem and is also a forecast and a requirement of the market.

Disclosure of Invention

The invention relates to a lawn mower for trimming lawns in places such as courtyards, parks, roads and the like, which combines noise elimination and metal post-treatment on the basis of an improved grass blocking mechanism for clearing a grass discharge channel by a hand mower and an improved automatic grass discharge channel clearing mechanism for a rear shaft at the bottom of the mower, and has the advantages of noise elimination, noise reduction and part wear resistance. The three-wheel mower is suitable for various types of mowers, comprises a three-wheel mower with a grass mowing head and a front single wheel which is heightened by a flat rod rotating angle gear, a series motor electric mower with a chassis anti-collision safety device and a function wave disc brake, and comprises an anti-collision safety device arranged at the front part of a mower chassis, a grass mower with a function wave disc brake arranged at the middle part of the mower chassis, a grass poking and blocking device with a motor driving gear and a grass breaking device, and an electric intelligent grass mower, so as to solve the old and difficult problems of crowded grass at a grass discharge port, winding and blocking, frictional heating and smooth grass discharge without law.

Because the chassis of the lawn mower is only a large pan-lid-like empty disc which is buckled on the lawn and has a distance of tens of millimeters from the ground, the grass of the lawn is pressed down at the front edge of the disc at the front part of the chassis of the lawn mower, the knife point of the mowing knife which rotates on the horizontal plane under the driving of the vertical shaft power moves two inches forward according to the vehicle body, and the mowing knife rotates one circle to mow the grass, and after the mowing knife is tangential to the disc of the chassis, the grass cutter is pushed and thrown for a distance of 500 mm, a considerable part of grass is repeatedly cut by rotating around the chassis for multiple times, a considerable part of grass is leaked out from gaps around the chassis, only a part of grass is crowded and wound to block a grass outlet which is required to enter the rear part of the chassis of the lawn mower, and the grass outlet is required to enter a rear grass collecting box of the lawn mower through a narrow grass discharge channel of only 100 mm, so that the improved mechanism for the grass discharge channel with the poking and cutting bottom rear shaft plays an important role; unfortunately, the market lawn mower has not a poking-cutting grass discharge channel mechanism for a bottom rear shaft for many years, the existing situation of grass leakage and grass blockage is difficult to solve, a large amount of precious grass which is not collected is wasted, and a lot of power is wasted by repeated cutting.

The improved grass pushing-cutting and arranging channel mechanism for the bottom rear shaft of the lawn mower has the beneficial effects that the ultrathin blade and the noise elimination inner shaft which are processed by special materials, carbon nitrogen boron and organic post-processing are adopted, more collection mowing is carried out, repeated cutting is reduced, grass pushing-cutting and arranging is improved, the grass discharging channel is improved, friction heating is reduced, the processing technology is improved, the service life is prolonged, the product quality is improved, the blade is not broken, the rear row noise is reduced, the mower with the motor and the engine is universal, and the pioneer of the novel market lawn mower with the grass pushing-cutting and arranging channel mechanism for the bottom rear shaft is created. The pressure protection sensor is arranged, and when the pressure protection sensor is overloaded, the sensor sends out a signal and leads an overload contact piece of the electromagnet to attract, so that the cutter holder and the blade slide and automatically avoid rotating; the improved rear axle at the bottom of the lawn mower is driven by the power of a poking and cutting grass discharging channel mechanism or directly by a motor and a speed reducer (108).

The improved poking-cutting grass discharge channel mechanism for the bottom of the rear shaft at the bottom of the lawn mower is a dual-purpose poking-cutting grass discharge channel mechanism with noise elimination and metal post-treatment for the bottom of the lawn mower, a gear (j2) with a speed reducer and a poking-cutting rod (j1) of the lawn mower are arranged on a noise elimination inner shaft (j1a) of the rear shaft of the lawn mower, and the improved poking-cutting grass discharge channel mechanism is characterized in that the noise elimination inner shaft (j1a) is hollow and is provided with a plurality of noise elimination wedges; the rear shaft of the mower is hollow and tubular, the inside of the rear shaft of the mower is communicated so as to allow air to pass through the rear shaft for cooling, the rear shaft of the mower is divided into a left shaft and a right shaft, a sound-deadening inner shaft (j1a) is arranged between the left shaft and the right shaft of the rear shaft of the mower, the sound-deadening inner shaft (j1a) is divided into three sections, the diameter of the middle section of the sound-deadening inner shaft (j1a) is matched with the rear shaft of the mower, the diameters of the left section and the right section of the sound-deadening inner shaft (j1a) are hollow pipes smaller than the inner diameters of the left shaft and the right shaft of the rear shaft of the mower, the left section of the sound-deadening inner shaft (j1a) is inserted into the left shaft of the rear shaft of the mower, the right section of the sound-deadening inner shaft (j1a) is inserted into the right shaft of the rear shaft of the mower, a plurality of six-cone-shaped sound-deadening holes are arranged on the sound-deadening inner shaft (j1a, the silencing inner shaft is close to one end of the inner shaft matched with the rear shaft of the mower, the silencing wedges in the hexagonal pyramid shape are arranged densely, the silencing wedges in the hexagonal pyramid shape are arranged sparsely on the hollow core tube of the inner shaft far away from one end of the inner shaft matched with the rear shaft of the mower, an isolation connecting part is arranged outside the middle of the silencing inner shaft and serves as a rear shaft matched position of the mower, one end of the isolation connecting part is connected with one end, close to the grass outlet, of the right side of the rear shaft, the other end of the isolation connecting part is connected with one end, far away from the grass outlet, of the rear shaft, so that the airflow, which is generated from the poking and cutting position close to the grass outlet, of turbulent noise of Rayleigh Hill parameters and Rich noise is referred, is compressed at ports close to the right rear wheel and one end close to the grass outlet and then expands into the hollow rear shaft, and the expanded airflow passes through the hollow core tube of the inner shaft in the hollow core tube close to one end of the grass outlet in the hollow rear shaft The dense silencing wedges in the hexagonal pyramid shape are recompressed, after the silencing inner shaft runs slightly, the sparse silencing wedges in the hexagonal pyramid shape are recompressed and then overflow to an inner through hole at the other end of the silencing inner shaft in the rear shaft to be communicated to the outside, so that the silencing and noise reducing processes are carried out through compression, expansion, recompression and re-expansion; the air is convenient to be introduced outside for cooling; the poking and cutting rod (j1) is provided with a plurality of pieces which are sleeved on the rear shaft, each poking and cutting rod is provided with three blades which are 60 degrees with each other, but the three blades which are 60 degrees with each other of each adjacent poking and cutting rod are staggered by 30 degrees with each other; the sliding cutting angle is 20 degrees, and the included angle between the extending direction of each blade along the radial direction and the backward-inclined cutter relieving of the radial line is 13.5 degrees; the reducer gear (j2), the silencing inner shaft (j1a) and the toggle rod (j1) are metal workpieces, and high-frequency current is used for post-processing by utilizing a skin effect; when the blade hits obstacles such as stones, breakage and gear and engine power damage are easily caused; adopting ultra-thin blade and noise elimination inner shaft which are made of special material and treated by carbon, nitrogen and boron and organic post-treatment, utilizing skin effect to bury metal workpiece in rare earth, using high-frequency current to treat, placing the workpiece or adopting titanium aluminum and rhenium in formed ceramic containing yttrium oxide, rare earth, indium and clay, and matching with homotopic radiation and laser scanning; the blade is subjected to three-dimensional printing by carbon fiber, is edged by a diamond knife, is put into mixed buried soil of nano-scale printing carbon powder, urea and borax for heat treatment, is scanned by a variable frequency electromagnetic field and laser, is catalyzed by platinum and rhodium, and is subjected to electromagnetic co-infiltration heat treatment, so that the space lattice of the blade is dispersed; carrying out organic post-treatment, heating at 723 ℃ of a co-permeation inflection point, placing into horse urine for quenching, washing with clean water, and smearing varnish; the blade can meet the actual grass poking and cutting requirements and has the function of overload protection, so that a pressure protection sensor is arranged, and when the blade is overloaded, the sensor sends out a signal and an overload contact piece of an electromagnet is attracted to enable the blade holder and the blade to slip and automatically avoid rotating; the improved rear axle at the bottom of the lawn mower is driven by the power of a poking and cutting grass discharging channel mechanism or directly by a motor and a speed reducer (108).

The lawn mower with the front left-right follow-up double universal wheels comprises a noise elimination and metal post-treatment dual-purpose lawn mower bottom grass poking and discharging channel mechanism, wherein the lawn mower comprises a gear (j2) with a speed reducer and a poking and cutting rod (j1) which are arranged on a noise elimination inner shaft (j1a) of a rear shaft of the lawn mower, and the noise elimination inner shaft (j1a) is a hollow three-section noise elimination pipe with a plurality of miniature noise elimination wedges; the rear shaft of the mower is hollow and tubular, the inside of the rear shaft of the mower is communicated so as to allow air to pass through the rear shaft for cooling, the rear shaft of the mower is divided into a left shaft and a right shaft, a sound-deadening inner shaft (j1a) is arranged between the left shaft and the right shaft of the rear shaft of the mower, the sound-deadening inner shaft (j1a) is divided into three sections, the diameter of the middle section of the sound-deadening inner shaft (j1a) is matched with the rear shaft of the mower, the diameters of the left section and the right section of the sound-deadening inner shaft (j1a) are hollow pipes smaller than the inner diameters of the left shaft and the right shaft of the rear shaft of the mower, the left section of the sound-deadening inner shaft (j1a) is inserted into the left shaft of the rear shaft of the mower, the right section of the sound-deadening inner shaft (j1a) is inserted into the right shaft of the rear shaft of the mower, a plurality of six-cone-shaped sound-deadening holes are arranged on the sound-deadening inner shaft (j1a, the silencing inner shaft is close to one end of the inner shaft matched with the rear shaft of the mower, the silencing wedges in the hexagonal pyramid shape are arranged densely, the silencing wedges in the hexagonal pyramid shape are arranged sparsely on the hollow core tube of the inner shaft far away from one end of the inner shaft matched with the rear shaft of the mower, an isolation connecting part is arranged outside the middle of the silencing inner shaft and serves as a rear shaft matched position of the mower, one end of the isolation connecting part is connected with one end, close to the grass outlet, of the right side of the rear shaft, the other end of the isolation connecting part is connected with one end, far away from the grass outlet, of the rear shaft, so that the airflow, which is generated from the poking and cutting position close to the grass outlet, of turbulent noise of Rayleigh Hill parameters and Rich noise is referred, is compressed at ports close to the right rear wheel and one end close to the grass outlet and then expands into the hollow rear shaft, and the expanded airflow passes through the hollow core tube of the inner shaft in the hollow core tube close to one end of the grass outlet in the hollow rear shaft The dense silencing wedges in the hexagonal pyramid shape are recompressed, after the silencing inner shaft runs slightly, the sparse silencing wedges in the hexagonal pyramid shape are recompressed and then overflow to an inner through hole at the other end of the silencing inner shaft in the rear shaft to be communicated to the outside, so that the silencing and noise reducing processes are carried out through compression, expansion, recompression and re-expansion; the air is convenient to be introduced outside for cooling; the poking and cutting rod (j1) is provided with a plurality of pieces which are sleeved on the rear shaft, each poking and cutting rod is provided with three blades which are 60 degrees with each other, but the three blades which are 60 degrees with each other of each adjacent poking and cutting rod are staggered by 30 degrees with each other; the sliding cutting angle is 20 degrees, and the included angle between the extending direction of each blade along the radial direction and the backward-inclined cutter relieving of the radial line is 13.5 degrees; the reducer gear (j2), the silencing inner shaft (j1a) and the toggle rod (j1) are metal workpieces, and high-frequency current is used for post-processing by utilizing a skin effect; when the blade hits obstacles such as stones, breakage and gear and engine power damage are easily caused; adopting special materials, ultra-thin blades treated by carbon, nitrogen and boron and organic post-treatment and a silencing inner shaft, burying a metal workpiece in rare earth by utilizing a skin effect, and treating by using high-frequency current; the workpiece is made of titanium aluminum and rhenium, and is put in the formed ceramic containing yttrium oxide, rare earth, indium and clay, and is matched with the homothetic radiation and laser scanning; the blade is subjected to carbon fiber three-dimensional printing and then sharpened by a diamond knife; firstly, placing the mixture of nano-scale printing carbon powder, urea and borax in buried soil for heat treatment, scanning by using a variable frequency electromagnetic field and laser, catalyzing by using platinum and rhodium, and performing electromagnetic co-infiltration heat treatment to disperse the space lattice; carrying out organic post-treatment, heating at 723 ℃ of a co-permeation inflection point, placing into urine of an animal for quenching, washing with clear water, and smearing varnish; the blade can meet the actual grass poking and cutting requirements and has the function of overload protection, so that a pressure protection sensor is arranged, and when the blade is overloaded, the sensor sends out a signal and an overload contact piece of an electromagnet is attracted to enable the blade holder and the blade to slip and automatically avoid rotating; the improved rear axle at the bottom of the lawn mower is driven by the power of a poking and cutting grass discharging channel mechanism or directly by a motor and a speed reducer (108); the lawn mower with the front left-right follow-up double universal wheels is characterized in that the front left-right follow-up double universal wheels are symmetrically provided with the follow-up universal wheels in a left-right manner in the front direction of the lawn mower, the follow-up universal wheels comprise universal adjusting knobs (1), universal upper covers (2), universal lower covers (3), universal single-inclined arms (4), multi-claw universal wheels (5), universal vertical shafts (6), universal elastic clamping pins (7), universal clamping pin springs (8) and universal vertical shaft clamping rings (9), the universal adjusting knobs (1) are arranged above the universal upper covers (2) and the universal lower covers (3), the universal upper covers (2) and the universal lower covers (3) clamp and fix a front machine frame of the lawn mower, the universal adjusting knobs (1), the universal upper covers (2) and the universal lower covers (3) are movably provided with the universal vertical shafts (6), the universal vertical shaft clamping ring (9) is arranged above the universal vertical shaft (6), the universal single-inclined arm (4) is arranged below the universal vertical shaft (6), and the multi-claw universal wheel (5) is arranged on a horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4); the universal elastic bayonet lock (7) and the universal bayonet lock spring (8) which move vertically are arranged in the universal upper cover (2) and the universal lower cover (3), an inclined surface (1a) arranged in the universal adjusting knob (1) is matched with the upper end of the universal elastic bayonet lock (7), the inclined surface (1a) arranged in the universal adjusting knob (1) is a logarithmic curved surface and has the characteristic of equal pressure angle positions, and after the universal adjusting knob (1) is held by fingers of a person to be adjusted, the universal elastic bayonet lock (7) can be pressed down to enable the universal single inclined arm (4) and the multi-claw universal wheel (5) to be straight towards the front without universal rotation; the universal adjusting knob (1) is provided with a fingerprint identification device and is only operated by a specially-assigned person; the universal single-inclined arm (4) is only provided with a single arm, and the single arm extends out at an angle of 45 degrees so as to reduce grass clipping; the profile of the multi-claw universal wheel (5) is provided with more than 100 multi-claws in the shape of gears to form the multi-claw universal wheel so as to grab grass and reduce slippage; a horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with a motor and a planetary reducer to drive the multi-claw universal wheel (5); the motor and the planetary reducer are three-stage four-planetary-gear reduction gearbox, the three-stage four-planetary-gear meshing gear reduction gearbox is used for the mower, a brushless motor is adopted, and a speed control circuit is arranged; the number of teeth of the motor driving gear (88) is 20; the motor gear with the tooth number of 20 of the motor driving gear (88) is in meshed transmission with four planetary gears (98) on a first-stage planetary carrier of a three-stage planetary system, and the gears are cycloid gears; the four planetary gears (98) with the tooth numbers of 19 and the modulus of 0.6, which rotate and revolve around the common axis along the axis of the motor, are respectively arranged on four planetary gear shafts of a planetary carrier (97) which are equally divided and are equidistant to the common axis; the motor gear with the tooth number of 20 is made of steel 40 Cr; four planet wheels of the planet gear (98) are all made of polyformaldehyde SP 500; the internal gear (99) of the central wheel of the planetary train, which meshes with the planet wheels and whose geometric axis is fixed, is of steel 40Cr, with a modulus of 0.6 and a number of teeth of 60, said planetary gear transmission being of the NGW type, N being the internal gear, G being the common gear between the two gear pairs, W being the external gear; the central output gear on the first-stage planet carrier is in meshing transmission with four planetary gears (98) on the second-stage planet carrier, and the four planetary gears (98) with the tooth number of 19 and the modulus of 0.6, which rotate and revolve around the common axis along the axis of the motor, of the second stage are respectively arranged on four planetary gear shafts of a planet carrier (97) which are evenly distributed and have equal distances on the common axis; the central output gear on the first-stage planet carrier is made of steel 40Cr, and four planet gears of four planet gears (98) on the second-stage planet carrier are all made of polyformaldehyde SP 500; the internal gear (99) of the central wheel of the planetary train, which meshes with the planet wheels and whose geometric axis is fixed, is of steel 40Cr, the modulus is 0.6, the number of teeth is 60, the classification of the planetary gear transmission is also of NGW type, N is the internal gear, G is the common gear in the middle of the two gear meshing pairs, W is the external gear; the central output gear on the second-stage planet carrier is in meshing transmission with three planetary gears (98) on the third-stage planet carrier, and three planetary gears (98) with the tooth number of 18 and the modulus of 0.6, which rotate and revolve around a common axis along the axis of the motor, of the third stage are respectively arranged on three planetary gear shafts of a planet carrier (97) which is equally divided and is equidistant to the common axis; the central output gear on the second-stage planet carrier is made of steel 40Cr, the number of teeth is 18, the modulus is 0.6, and three planet gears of three planet gears (98) on the third-stage planet carrier are made of steel 40Cr instead of polyformaldehyde SP 500; the internal gear (99) of the central wheel of the planetary train, which meshes with the planet wheels and whose geometric axis is fixed, is of steel 40Cr, the modulus is 0.6, the number of teeth is 60, the classification of the planetary gear transmission is also of NGW type, N is the internal gear, G is the common gear in the middle of the two gear meshing pairs, W is the external gear; the motor is provided with a speed control circuit; a muffler and a radiator are provided outside the internal gear (99) to perform noise reduction and cooling.

The right section of the silencing inner shaft (j1a) is inserted into the right shaft of the rear shaft of the mower for silencing and cooling reference, a plurality of hexagonal cone-shaped silencing wedges are arranged on the silencing inner shaft (j1a), small holes are formed in the tops of the hexagonal cones to serve as silencing holes, the hexagonal cone-shaped silencing wedges arranged on a hollow core pipe of the inner shaft close to one end matched with the rear shaft of the mower are dense, the hexagonal cone-shaped silencing wedges arranged on a hollow core pipe of the inner shaft far away from one end matched with the rear shaft of the mower are sparse, an isolation connecting part is arranged outside the middle of the silencing inner shaft to serve as a matched position of the rear shaft of the mower, one end of the isolation connecting part is connected with one end of the rear shaft close to the grass outlet, and the other end of the isolation connecting part is connected with one end of the rear shaft far away from the grass outlet, so as to refer to the air flow coming from the cutting position close to the grass outlet of the turbulent noise of the Letehl parameters and the Richcz noise, the air flow is compressed at the port close to the right rear wheel and one end close to the grass outlet and then expands to enter the hollow rear shaft, the expanded air flow is recompressed by a plurality of hexagonal pyramid-shaped dense silencing wedges arranged on a hollow pipe of a silencing inner shaft at one end close to the grass outlet of the silencing inner shaft in the hollow rear shaft, and after the air flow slightly runs through the silencing inner shaft, the air flow is recompressed by a plurality of hexagonal pyramid-shaped sparse silencing wedges arranged on the hollow pipe of the silencing inner shaft at one end far away from the grass outlet of the silencing inner shaft and then overflows to the inner through hole at the other end of the silencing inner shaft in the rear shaft again to pass to the outside, so that the processes of silencing and noise reduction are carried out by compression, expansion, recompression and re-expansion; the air is convenient to be introduced outside for cooling; the poking and cutting rod (j1) is provided with a plurality of pieces which are sleeved on the rear shaft, each poking and cutting rod is provided with three blades which are 60 degrees with each other, but the three blades which are 60 degrees with each other of each adjacent poking and cutting rod are staggered by 30 degrees with each other; the sliding cutting angle is 20 degrees, and the included angle between the extending direction of each blade along the radial direction and the backward-inclined cutter relieving of the radial line is 13.5 degrees; the reducer gear (j2), the silencing inner shaft (j1a) and the toggle rod (j1) are metal workpieces, and high-frequency current is used for post-processing by utilizing a skin effect; when the blade hits obstacles such as stones, breakage and gear and engine power damage are easily caused; adopting ultra-thin blade and noise elimination inner shaft which are made of special material and treated by carbon, nitrogen and boron and organic post-treatment, utilizing skin effect to bury metal workpiece in rare earth, using high-frequency current to treat, placing the workpiece or adopting titanium aluminum and rhenium in formed ceramic containing yttrium oxide, rare earth, indium and clay, and matching with homotopic radiation and laser scanning; the blade is subjected to three-dimensional printing by carbon fiber, is edged by a diamond knife, is put into mixed buried soil of nano-scale printing carbon powder, urea and borax for heat treatment, is scanned by a variable frequency electromagnetic field and laser, is catalyzed by platinum and rhodium, and is subjected to electromagnetic co-infiltration heat treatment, so that the space lattice of the blade is dispersed; carrying out organic post-treatment, heating at 723 ℃ of a co-permeation inflection point, placing into horse urine for quenching, washing with clean water, and smearing varnish; the blade can meet the actual grass poking and cutting requirements and has the function of overload protection, so that the pressure protection sensor is arranged, and when the blade is overloaded, the sensor sends out a signal and leads the overload contact piece of the electromagnet to attract and automatically avoid rotating.

Because the lawn mower only has the front universal wheel and does not have the universal wheel with a rolling lock, the lawn mower is difficult to walk straight at a long distance, and an operator can not walk straight easily at the back of a far mower handrail at a left or right direction due to the lever action of the handrail, which is an old and difficult problem, the lawn mower with the front left and right follow-up double universal wheels is previously made, and is characterized in that the front left and right follow-up double universal wheels are symmetrically arranged at the left and right in the front direction of the lawn mower, the follow-up universal wheels comprise a universal adjusting knob (1), a universal upper cover (2), a universal lower cover (3), a universal single inclined arm (4), a multi-claw universal wheel (5), a universal vertical shaft (6), a universal elastic clamping pin (7), a universal clamping pin spring (8) and a universal vertical shaft clamping ring (9), the adjusting knob (1) is arranged above the universal upper cover (2) and the universal lower cover (3), the universal upper cover (2) and the universal lower cover (3) clamp a front frame of the mower, the universal adjusting knob (1), the universal upper cover (2) and the universal lower cover (3) are movably provided with the universal vertical shaft (6), the universal vertical shaft clamping ring (9) is arranged above the universal vertical shaft (6), the universal single-inclined arm (4) is arranged below the universal vertical shaft (6), and the horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with the multi-claw universal wheel (5); the universal elastic bayonet lock (7) and the universal bayonet lock spring (8) which move vertically are arranged in the universal upper cover (2) and the universal lower cover (3), an inclined surface (1a) arranged in the universal adjusting knob (1) is matched with the upper end of the universal elastic bayonet lock (7), the inclined surface (1a) arranged in the universal adjusting knob (1) is a logarithmic curved surface and has the characteristic of equal pressure angle positions, and after the universal adjusting knob (1) is held by fingers of a person to be adjusted, the universal elastic bayonet lock (7) can be pressed down to enable the universal single inclined arm (4) and the multi-claw universal wheel (5) to be straight towards the front without universal rotation; the universal adjusting knob (1) is provided with a fingerprint identification device and is only operated by a specially-assigned person; the universal single-inclined arm (4) is only provided with a single arm, and the single arm extends out at an angle of 45 degrees so as to reduce grass clipping; the profile of the multi-claw universal wheel (5) is provided with more than 100 multi-claws in the shape of gears to form the multi-claw universal wheel so as to grab grass and reduce slippage; a horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with a motor and a planetary reducer to drive the multi-claw universal wheel (5); however, the actual situation is undesirable, because the inclined angle of the original structural design is too steep and has defects in matching with other structures, when a person holds the universal adjusting knob by fingers to adjust, the universal adjusting knob can not press down the universal elastic bayonet lock to lock or lock and occasionally fail to open. The universal adjusting knob (1) is provided with a fingerprint identification device which is supposed to be operated by a special person but fails because weeds mix wet soil. A horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with a motor and a planetary reducer to drive a multi-claw universal wheel (5), but a power line between the motor and a battery is wound for several 360 degrees sometimes to cause a fault; develop a simple elastic foldable handrail mower without using tools, that is, a mower with rolling lock rotating universal wheels, a mower with folding handrail and standing and a grass collecting box bag, a mower with bent handrail and easy-to-take grass collecting box, and a mower with simple elastic foldable handrail, and a mower with a simple elastic foldable handrail? The conventional side grass discharging plate is an additional separate component, and when the side grass discharging plate is not used, the side grass discharging plate needs to be detached independently and is not placed at a proper position for storage, when the side grass discharging plate needs to be used, the side grass discharging plate needs to be found and installed again, and whether the side grass discharging plate needs to be detached independently or not is difficult, and because the side grass discharging plate extends out of a very occupied space of a chassis of a machine body from the right side and is difficult to enter a packing box, whether a mower which is easy to place by turning up one side grass discharging plate, a mower which is controlled by wheels to cut wavy patterns and a mower which is linked by a pull rod and a height adjusting disc through a pull rope can? Both of these are market demands and are a long-standing problem.

A poking rod heightening disc is a mower linked by a guy cable, a rolling lock is used for rotationally adjusting a universal wheel, and the poking rod heightening disc comprises a universal upper cover (2), a universal lower cover (3), a universal single-inclined arm (4), a multi-claw universal wheel (5), a universal vertical shaft (6), a lock button (11), a lock disc (12), a lock cap (13), a lock spring (14), a lock rod (15), a lock body (16), a positioning pin (17) and a lock pit (4 a); the universal upper cover (2) and the universal lower cover (3) clamp a front frame of the mower, vertical shaft holes are formed in the universal upper cover (2) and the universal lower cover (3), the universal vertical shaft (6) is vertically and movably arranged, the lock knob (11) and the lock disc (12) are arranged above the vertical shaft holes of the universal upper cover (2) and the universal lower cover (3) and above the universal vertical shaft (6), the universal single-inclined arm (4) is arranged below the vertical shaft holes of the universal upper cover (2) and the universal lower cover (3) and below the universal vertical shaft (6), and the horizontal movable steering front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with the multi-claw universal wheel (5); the rolling lock is characterized in that the middle of a lock knob (11) of the rolling lock presses a lock disc (12), the lock disc (12) is provided with a rotating lock and an opening indication, the lock disc (12) is provided with two hooks for clamping, the lock knob (11) is internally provided with a lock cap (13), a lock spring (14) and a lock body (16), the lock body (16) is provided with two positioning pins (17), the end parts of the positioning pins (17) are pointed so as to be positioned with the lock knob (11), the lock body (16) is provided with a section of climbing surface (16a) from low to high, the climbing surface is a catenary and is provided with a plurality of balls so as to be contacted with roller bearings at the opening edge of the periphery of the lower part of the lock cap (13) to control the lock lever (15); the lock rod (15) is arranged below the lock cap (13) and the lock spring (14); the lock rod (15) is offset in parallel with the universal vertical shaft (6), a small shoulder is arranged at the upper part of the lock rod (15) and is provided with the lock cap (13) and the lock spring (14), the lock spring (14) arranged in the lock cap (13) is pressed on a small shoulder arranged at the upper part of the lock rod (15), the inside of the lock button (11) contacts with a ball body (13c) arranged on an arc-shaped bulge at the upper part of the lock cap (13), the opening edge of the circumference of the lower part of the lock cap (13) is in contact with the climbing surface (16a) of the lock body (16) through a roller bearing (15c) arranged at the small shoulder, the lock rod (15) penetrates through the universal upper cover (2) and the universal lower cover (3), the lower end of the lock rod (15) is provided with an arc-shaped lock head (15a) with a ball, and the universal single-inclined arm (4) is provided with the lock pit (4 a); when the lock button (11) is manually screwed for 180 degrees and locked, an arc-shaped lock head (15a) with a ball at the lower end of the lock rod (15) is inserted into a lock pit (4a) arranged on the universal single-inclined arm (4) to be locked so that the shifting rod heightening disc moves straight by the inhaul cable linkage mower, and when the lock button (11) is manually screwed for 180 degrees and unlocked, the arc-shaped lock head at the lower end of the lock rod (15) is pulled out of the lock pit (4a) arranged on the universal single-inclined arm (4) to be unlocked so that the shifting rod heightening disc can freely turn by the inhaul cable linkage mower; the rear part of the chassis body of the mower is also provided with an armrest seat (18), a lower armrest (19) and an upper armrest (20), when the lower armrest (19) and the upper armrest (20) are folded and the chassis body of the mower is placed in an upright manner, the length of the rear end part of the armrest seat (18) is rightly landed and matched with a rear wheel on the chassis body of the mower to land together in a certain way, so that the chassis body of the mower is stably placed in an upright manner, and the storage place is saved; the total distance from the rear end of the armrest seat (18) to the foremost end of the armrest seat when the armrest seat is placed in the standing state is equal to the diameter of a rear wheel on the chassis body of the mower, and the rotating center of the lower armrest (19) in the folding and rotating process of the armrest seat (18) when the armrest seat is placed in the standing state is equal to the height from the center of a circle of the rear wheel on the chassis body of the mower to the ground; the shifting lever heightening disc is linked with the mower by a pull rope, and the mower chassis body can be stably placed in a standing mode when the mower is provided with a grass collecting box bag, so that the storage place is saved; the lower handrail (19) is not higher than the rod of the grass collecting bag so that the grass collecting bag can be easily taken out; the shifting lever heightening disc is linked by a pull rope, a hole of a left rod at the lower part of a lower handrail (19) is inserted into a transverse pin (22) at the rotating center of a handrail seat (18) at the left side of a machine body, a hole of a right rod at the lower part of the lower handrail (19) is also inserted into the transverse pin (22) at the rotating center of the handrail seat (18) at the right side of the machine body, the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are bent and formed to fixedly retain the elastic modulus of metal, can elastically open outwards, are attached to the handrail seat (18) and are firmly clamped by a low side edge of the handrail seat (18) to finish assembly and enable operation, when the mower needs to be folded, the simple elastic edge of the handrail can be folded inwards by only pressing the left rod and the right rod handrails inwards by about 10 mm and crossing the low side edge of the handrail seat, and the hole of the left rod is still inserted into the transverse pin (22) at the rotating center of the handrail seat (18) at the left side of the The hole of the right rod at the lower part is still inserted into a transverse pin (22) at the rotating center of a handrail seat (18) at the right side of the machine body, the hole of the left rod and the hole of the right rod are both arranged at the lower part of a flattened lower handrail (19) with the thickness of about 5 mm, and the extending length of each transverse pin (22) which is opposite is about 20-40 mm, which is enough for the handrail to be simply folded inwards elastically; the end of each transverse pin (22) is provided with an open elastic washer so as to block and prevent falling off; the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are taken down on a bending machine and then are immediately placed on a drying kiln conveyor belt to pass through one so as to ensure that the elastic modulus of the metal is kept after forming, and more elasticity is provided for opening outwards; a grass mower with a shifting lever for adjusting the mowing height is characterized in that a grass discharging pressure plate with an elastic hinge and a side grass discharging plate which needs to be additionally taken and placed and fixedly arranged on a chassis are combined into a side grass discharging plate (23) above a right grass discharging opening of the chassis of a mower body, the side grass discharging pressure plate only needs to be placed on the chassis and does not need to be additionally taken, placed and detached, the side grass discharge plate (23) shortens the pressing plate of the conventional grass discharge pressing plate with the elastic hinge to 20-30 mm, and the upper plate surface of the side grass discharging plate is arranged at an angle of about 80 to 110 degrees with the surface of the pressing plate to form the side grass discharging plate, so that the side grass discharge plate can be easily put into the packing box when turned upwards and can be easily put down to discharge grass when turned downwards, the front side and the rear side of the upper plate surface of the side grass discharge plate are respectively provided with a front grass discharge guard plate and a rear grass discharge guard plate which are approximately perpendicular to the upper plate surface; the wheel of the mower is set as a polygonal wheel (24), and when the mower runs, the mower can move to cut the wavy patterns by moving the mowing knife to beautify the lawn by rolling up and down; a mower with a mowing height adjusted by a shifting lever is provided with a height-adjusting shifting lever (25) and a height-adjusting disc (26) between a chassis and wheels, wherein the height-adjusting shifting lever (25) is elastic and is provided with a rectangular notch so as to be shifted to any one of a plurality of gears arranged on the height-adjusting disc (26), and the gears are formed by cutting two long sides of the punched rectangular notch and breaking two short sides to form bulges which are rectangular in front view and arc in side view; the heightening shift lever (25) is also provided with a pull rope (27) so as to be connected to the pull rope reel in a gathering way to control heightening.

Has the advantages that: the problems that only the front universal wheel of the lawn mower is difficult to walk straight and the chassis body of the lawn mower can be stably placed when the lawn mower is provided with a grass collecting box bag without disassembling the lawn mower are solved, so that the storage place is saved; sliding provides a reliable lock for rolling; the lower armrest (19) is not higher than the grass collecting bag so that the grass collecting bag can be easily taken out. The problem that the handrail can be simply and elastically folded inwards without tools is solved by skillfully utilizing the rebound opening effect left by the bent pipe. When the lower handrail (19) and the upper handrail (20) are folded and the chassis body of the mower is placed in a standing mode, the length of the rear end of the handrail seat (18) is just right to land and matched with the rear wheel on the chassis body of the mower to land together in a fitting mode, so that the chassis body of the mower is placed stably in a standing mode, the total distance from the rear end of the handrail seat (18) to the front end of the handrail seat is equal to the diameter of the rear wheel on the chassis body of the mower, and the rotating center of the lower handrail (19) in the folding and rotating mode of the handrail seat (18) is equal to the height from the circle center of the rear wheel on the chassis body of the mower to the ground when the lower handrail (19) and the upper handrail (20) are placed in a standing mode; according to the simple elastic inward folding mower with the handrails, a hole of a left rod at the lower part of a lower handrail (19) is inserted into a transverse pin (22) at the rotating center of a handrail seat (18) on the left side of a machine body, a hole of a right rod at the lower part of the lower handrail (19) is also inserted into the transverse pin (22) at the rotating center of the handrail seat (18) on the right side of the machine body, the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are bent and formed, the elastic modulus of metal is kept, the handrails can be opened outwards elastically, the handrails are attached to the handrail seat (18) and are clamped and tightly abutted by low side faces of the handrail seat (18) to complete assembly and enable operation, when the mower is required to be folded, the left rod and the right rod are pressed inwards by about 10 mm to cross the low side faces of the handrail seat, the elastic inward folding handrail can be realized, the hole of the left rod is still inserted into the transverse pin (22) at the rotating center of the handrail seat (18 The hole of the right rod is still inserted into a transverse pin (22) of the rotation center of a handrail seat (18) on the right side of the machine body, the hole of the left rod and the hole of the right rod are both arranged at the lower part of a flattened lower handrail (19) with the thickness of about 5 mm, and the extending length of each transverse pin (22) which is opposite is about 20-40 mm, which is enough for the handrail to be simply folded inwards elastically; the end of each transverse pin (22) is provided with an open elastic washer so as to block and prevent falling off; the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are taken down on a bending machine and then are immediately placed on a drying kiln conveyor belt to pass through one so as to ensure that the elastic modulus of the metal is kept after forming, and more elasticity is provided for opening outwards; the old and difficult problem that the simple elastic inward-folded mower with the handrail can be used without tools is solved by skillfully utilizing the rebound opening effect left by the bent pipe. The wheel of the mower is set as a polygonal wheel (24), and when the mower runs, the mower can move with the mowing knife to mow and cut the wavy patterns to beautify the lawn by rolling up and down. A kind of driving lever adjusts the lawn mower of the mowing height, there are heightening driving levers (25) and heightening discs (26) between chassis and wheel, the flexible heightening driving lever (25) is equipped with the rectangular gap in order to shift to any gear set in heightening discs (26), the said gear is cut from two long edges of the rectangular gap punched and two short edges are not broken and shaped into the bulging which is rectangular in front view and circular arc in side view, the effect is apparent; the heightening shift lever (25) is also provided with a pull rope (27) so as to gather and connect a pull rope reel beside the upper armrest to control heightening.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the bottom of a modified grass mower bottom rear axle grass cutting and discharging channel mechanism.

FIG. 2 is a schematic bottom view of a poke-cut grass discharge channel mechanism for a bottom rear axle of a lawn mower.

Fig. 3 is a schematic view of a poke-cut weed-discharging channel mechanism for a bottom rear axle.

Fig. 4 is an enlarged schematic view of the bottom rear axle grass raking and discharging channel mechanism.

Fig. 5 is a schematic diagram of an electric motor with a speed reducer (108) to drive a smart mower.

FIG. 6 is a further schematic bottom view of a dial cutting and grass discharge channel mechanism for a bottom rear axle of a greens mower.

FIG. 7 is a further schematic view of the front bottom view of a dial cutting and grass discharge channel mechanism for the bottom rear axle of a greens mower.

FIG. 8 is a schematic view of the rear of a modified grass mower bottom rear axle grass cutting and discharge channel mechanism.

Fig. 9 is a schematic view of the sound damping inner shaft (j1 a).

Fig. 10 is a schematic diagram of the gear (j2) of the reduction gear and the toggle lever (j1) viewed from the left side.

Fig. 11 is a schematic diagram of the gear (j2) of the speed reducer and the dial lever (j1) viewed from the right side.

FIG. 12 is a schematic view of a greens mower with dual universal wheels that follow left and right in a forward direction.

FIG. 13 is a schematic view of a follower gimbal.

Fig. 14 is a schematic combination diagram of the universal upper cover (2) and the universal lower cover (3) of the follow-up universal wheel.

Fig. 15 is a schematic view of the universal adjustment knob (1).

Fig. 16 is a schematic view of the inside of the universal adjusting knob (1).

FIG. 17 is a schematic view of the gimbaled upper cover (2).

FIG. 18 is a schematic view of the reverse side of the gimbaled upper cover (2).

FIG. 19 is a schematic view of the gimbaled upper cover (2) and other components.

Fig. 20 is a schematic view of the gimbal independent arm (4) of the follower gimbal and other combinations.

Fig. 21 is a schematic view of the universal lower cover (3) of the follower universal wheel.

Fig. 22 is a schematic view of the reverse side of the universal lower cover (3) of the follower universal wheel.

FIG. 23 is a disassembled schematic view of the trailing gimbal.

FIG. 24 is a further exploded schematic view of the slave castor.

Fig. 25 is a schematic view of the gimbaled, single-tilt arm (4).

Fig. 26 is a schematic view of another direction of the gimbaled single-tilt arm (4).

FIG. 27 is an enlarged view of the gimbal upper cover (2) and other components.

FIG. 28 is an enlarged view of the combination of the cardan shaft (6), the cardan resilient bayonet (7) and others.

Fig. 29 is a schematic view of a planetary speed reducer of a slave gimbal using three stages of four planetary wheels.

FIG. 30 is a cross-sectional schematic view of a caster wheel being tuned with a roll lock.

FIG. 31 is a schematic view of the front of the mower erected with the handrail folded and the universal wheels used.

Fig. 32 is a schematic view of the lock knob (11).

Figure 33 is a schematic view of the lock knob (11) and lock body (16).

Fig. 34 is a schematic view of the lock collar (12).

Fig. 35 is a schematic view of the side of the lock collar (12).

Fig. 36 is a schematic view of the components of the lock lever (15), the positioning pin (17), and the lock collar (12).

Figure 37 is a schematic view of the lock body (16) and the climbing surface (16 a).

Fig. 38 is a schematic view of the lock cap (13).

Fig. 39 is a schematic view of the bolt (14).

Fig. 40 is a schematic view of the components of the locking lever (15), the positioning pin (17) and the locking disc (12) of the roll lock.

Fig. 41 is a schematic view of the lawnmower erected by folding the handrail.

Fig. 42 is a schematic view of the lawnmower erected with the folded handrail of the grass collection bag.

Fig. 43 is a schematic view of a lawnmower with a curved handrail easy access grass collection box.

Fig. 44 is a schematic view of an armrest for a lawnmower with the armrest simply resiliently folded inward.

Fig. 45 is a schematic view of the mower handrail and the handrail seat and the cross pin (22) with the handrail simply folded resiliently inward.

FIG. 46 is a schematic view of a walk-up mower with a side row of blades.

FIG. 47 is a schematic view of a side row of grass panels.

FIG. 48 is a schematic view of a mower with a shifter lever for adjusting mowing height.

FIG. 49 is a schematic view of a polygonal wheel.

Fig. 50 is a schematic view of an elevated plate.

FIG. 51 is a schematic view of the raise lever.

As shown, in the figure:

1. a universal adjusting knob; 2. a universal upper cover; 3. a universal lower cover; 4. a universal single-tilt arm; 5. a multi-claw universal wheel; 6, a universal vertical shaft; 7. a universal elastic bayonet lock; 8. a universal bayonet spring; 9. a universal vertical shaft snap ring; 1a, a bevel; 88. motor drive gear; 98. a planetary gear; 99. an internal gear; j1. a poking and cutting rod; j1a. a sound-deadening inner shaft; j2. is a gear of the reducer; 11. a lock knob; 12. a lock disc; 13. a lock cap; 14. a locking spring; 15. a lock lever; 16. a lock body; 17. positioning pins, 4a locking pits and 16a climbing surfaces; 18. a handrail seat; 19. a lower armrest; 20. an upper armrest; 21. a grass collecting box bag; 22. a transverse pin; 23. side grass discharge plates; 24. a polygonal wheel; 25. heightening a deflector rod; 26. and (5) heightening the disc.

Detailed Description

The improved grass poking, cutting and discharging channel mechanism for the bottom rear shaft of the lawn mower is a dual-purpose grass poking, cutting and discharging channel mechanism with the functions of noise elimination and metal post-treatment for the bottom of the lawn mower, the rear shaft of the lawn mower is hollow and tubular, the interior of the rear shaft of the lawn mower is communicated so as to be externally communicated with air for cooling, the rear shaft of the lawn mower is divided into a left shaft and a right shaft, a noise elimination inner shaft (j1a) is arranged between the left shaft and the right shaft of the rear shaft of the lawn mower, the noise elimination inner shaft (j1a) is divided into three sections, the diameter of the middle section of the noise elimination inner shaft (j1a) is matched with the rear shaft of the lawn mower, the diameters of the left section and the right section of the noise elimination inner shaft (j1a) are hollow pipes smaller than the inner diameters of the left shaft and the right shaft of the rear shaft of the lawn mower, the left section of the noise elimination inner shaft (j1a) is inserted into the left shaft of the rear shaft of the lawn mower, and the right section of the noise elimination shaft (j1a) is, a plurality of hexagonal cone-shaped silencing wedges are arranged on the silencing inner shaft (j1a), small holes are arranged at the top of the hexagonal cone-shaped silencing wedges to serve as silencing holes, the hexagonal cone-shaped silencing wedges arranged on a hollow core pipe of the inner shaft at one end, close to the matching position with the rear shaft of the mower, of the silencing inner shaft are dense, the hexagonal cone-shaped silencing wedges arranged on the hollow core pipe of the inner shaft at one end, far away from the matching position with the rear shaft of the mower, of the silencing inner shaft are sparse, so that airflow from the cutting position close to a grass outlet of turbulent noise of Rayleigh-Hill parameters and rational noise is referred, the airflow is compressed at ports close to a right rear wheel and one end close to the grass outlet and then expands into the hollow rear shaft, a metal workpiece is buried in rare earth by utilizing a skin effect, and post-treatment is carried out by high-frequency current; the workpiece is made of titanium aluminum and rhenium, and is placed in the formed ceramic containing yttrium oxide, rare earth, indium and clay, and is matched with homothetic radiation and laser scanning; the blade is three-dimensionally printed by carbon fiber, is edged by a diamond knife, is put into mixed buried soil of nano-scale printing carbon powder, urea and borax for heat treatment, is scanned by a variable frequency electromagnetic field and laser, and is catalyzed by platinum and rhodium, so that the space lattice of the blade is dispersed; placing the blade into mixed buried soil of nano-scale printing carbon powder, urea and borax for carbonitriding and carrying out variable frequency electromagnetic field co-cementation heat treatment; heating at 723 ℃ of a co-permeation inflection point, putting into horse urine for quenching, and smearing varnish after washing with clean water; the blade can meet the actual grass poking and cutting requirements and has the function of overload protection, so that the pressure protection sensor is arranged, when the blade is overloaded, the sensor sends out a signal and the overload contact piece of the electromagnet attracts to enable the blade holder and the blade to slip and automatically avoid rotating.

The three-level four-planet rear-drive walking gearbox for the intelligent garden mower is characterized in that a three-level four-planet meshing gear reduction box (108) for a lawn mower adopts a brushless motor, has the rotating speed of 20000 revolutions, the power of 150 watts and 36 volts, the diameter of an output shaft of 5 millimeters and a speed control circuit; the number of teeth of the driving gear of the motor is 20; the motor gear with the tooth number of 20 of the driving gear of the motor is meshed with four planetary gears on a first-stage planet carrier of a three-stage planetary system to drive the gears to use helical gears, and the helix angle of the helical gears is 12.7 degrees; the four planetary gears with the tooth number of 19 and the modulus of 0.6, which rotate and revolve around a common axis along the axis of the motor, are respectively arranged on four planetary gear shafts of a planetary carrier which are equally divided and are equidistant to the common axis; the motor gear with the tooth number of 20 is made of steel 40 Cr; four planet wheels of the planet gear are all made of polyformaldehyde SP 500; the internal gear of the central wheel of the planetary system which is engaged with the planetary wheel and has a fixed geometric axis is made of steel 40Cr, the modulus is 0.6, the tooth number is 60, the planetary gear transmission is classified into NGW type, N is an internal gear, G is a common gear between two gear engagement pairs, and W is an external gear; the transmission ratio of the planetary gear transmission is 1+60/20 and is 4, the recommended value of the transmission ratio is 2.7-9, and the transmission efficiency is 97-99 percent; the central output gear on the first-stage planet carrier is in meshing transmission with the four planetary gears on the second-stage planet carrier, the gears are all helical gears, the helix angle of the helical gears is 12.7 degrees, and the four planetary gears which have the tooth number of 19 and the modulus of 0.6, rotate and revolve around a common axis along the axis of the motor are respectively arranged on four planetary gear shafts of the planet carrier which are equally divided and are equidistant to the common axis; the central output gear on the first-stage planet carrier is made of steel 40Cr, and four planet gears of four planet gears on the second-stage planet carrier are made of polyformaldehyde SP 500; the internal gear of the central wheel of the planetary system which is meshed with the planetary wheel and has a fixed geometric axis is made of steel 40Cr, the modulus is 0.6, the tooth number is 60, the planetary gear transmission is also classified into NGW type, N is an internal gear, G is a common gear in the middle of two gear meshing pairs, and W is an external gear; the planetary gear transmission of the second stage has a gear ratio of 1+60/19 of 3.16;

firstly, building a computer 3D mould and then engraving the mould; and then add anticollision and brake on the lawn mower, its technical equation and modeling method are: PRO/ENGINEER WILDFIRE drawing software is adopted to newly set a work catalog, newly set parts and draft 2 concentric circles. The variable cross-section scanning (Var search Sweep) command is turned on, and the above 2 circles are selected as the scanning track and the reference track. Drawing a straight line parallel to the 2-circle plane, wherein the length L is (D-D)/2, and the straight line corresponds to the projection line of the circle edge. Set-up PARAMETER (PARAMETER) 1: real number (real number) of C, which can be assigned between 0.01 and 1, for example 0.3, according to specific working conditions; c is also known as the wave height. Set-up PARAMETER (PARAMETER) 2: n integer (integer), selected between 2-100 according to the specific working condition, for example 13; n is also called the wavenumber. A relationship (relationship) is established, such as the sine wave equation: computer default SDi ═ C × SIN (TRAJPAR × 360 × N); in the above formula, i is a size number serial number; SIN ═ SINE, SINE function; TRAJPAR, trace function. And then modeling as a function wave disc by adopting instructions of rotation, combination, materialization and the like.

Inputting the equation into a CNC machining center, and manufacturing a steel die by CIMATRO or MASTCAM, or processing by a milling machine, a planer and an electric spark. When the electric spark is used for machining, the formula is input into a CNC machining center, and a tungsten copper electrode is manufactured firstly.

There are various methods of manufacture; or the manufacturing method of die-casting aluminum alloy is adopted, and the function wave disc is produced in batch by using a die-casting machine with a cold pressure chamber, and friction-resistant material or graphite is added.

The central output gear on the second-stage planet carrier is in meshing transmission with the three planetary gears on the third-stage planet carrier, the gears are all helical gears, the helix angle of the helical gears is 12.7 degrees, and three planetary gears which have 18 teeth and 0 modulus 6, rotate and revolve around a common axis along the axis of the motor are respectively arranged on three planetary gear shafts of the planet carrier which are equally divided and are equidistant to the common axis; the central output gear on the second-stage planet carrier is made of steel 40Cr, the number of teeth is 18, the modulus is 0.6, and three planet gears of three planet gears on the third-stage planet carrier are made of steel 40Cr instead of polyformaldehyde SP 500; the internal gear of the central wheel of the planetary system which is meshed with the planetary wheel and has a fixed geometric axis is made of steel 40Cr, the modulus is 0.6, the tooth number is 60, the planetary gear transmission is also classified into NGW type, N is an internal gear, G is a common gear in the middle of two gear meshing pairs, and W is an external gear; the planetary gear transmission of the third stage has a gear ratio of 1+60/18 of 4.33; the above three-stage total transmission ratio is 4 x3.16x4.33-55 times, the rotating speed is 20000 r/55-360, and a speed control circuit is arranged; the mixture is used; the torque moment of each level is more reasonably distributed, the plastic gear is used at the position with small force, the steel gear is used at the position with large force, and the meshing characteristic of the helical gear is self-evident. Putting the gear into mixed buried soil of nano-scale printing carbon powder, urea and borax for heat treatment, scanning by a variable frequency electromagnetic field and laser, and catalyzing by platinum and rhodium to disperse the space lattice; putting the mixture into mixed buried soil for carbonitriding and heating at 723 ℃ of a co-cementation inflection point by variable frequency electromagnetic field co-cementation heat treatment, then putting the mixture into urine for quenching, and washing the mixture by clear water.

Because the space of the grass discharging channel is very narrow, the poking and cutting rods and the blades are more, and an ultrathin blade is adopted to improve the efficiency; the reducer gear (j2), the silencing inner shaft (j1a) and the toggle rod (j1) are metal workpieces and are treated by high-frequency current by utilizing a skin effect; when the blade hits obstacles such as stones, breakage and gear and engine power damage are easily caused; adopting ultra-thin blade and noise elimination inner shaft which are made of special material and treated by carbon, nitrogen and boron and organic post-treatment, utilizing skin effect to bury metal workpiece in rare earth, using high-frequency current to treat, placing the workpiece or adopting titanium aluminum and rhenium in formed ceramic containing yttrium oxide, rare earth, indium and clay, and matching with homotopic radiation and laser scanning; a blade or carbon fiber three-dimensional printing is adopted, and then a diamond knife is used for edging; firstly, placing the mixture of nano-scale printing carbon powder, urea and borax in buried soil for heat treatment, scanning by using a variable frequency electromagnetic field and laser, catalyzing by using platinum and rhodium, and performing electromagnetic co-infiltration heat treatment to disperse the space lattice; carrying out organic post-treatment, heating at 723 ℃ of a co-permeation inflection point, placing into horse urine for quenching, washing with clean water, and smearing varnish; the blade can meet the actual grass poking and cutting requirements and has the function of overload protection, so that a pressure protection sensor is arranged, and when the blade is overloaded, the sensor sends out a signal and an overload contact piece of an electromagnet is attracted to enable the blade holder and the blade to slip and automatically avoid rotating; the improved rear axle at the bottom of the lawn mower is driven by the power of a poking and cutting grass discharging channel mechanism or directly by a motor and a speed reducer (108).

Has the advantages that:

an improved poking-cutting grass discharging channel mechanism for a rear shaft at the bottom of a lawn mower; because the space of the grass discharging channel is very narrow, the poking and cutting rods and the blades are many, and the ultrathin blades are adopted; firstly, placing the mixture of nano-scale printing carbon powder, urea and borax in the buried soil for heat treatment, scanning by using a variable frequency electromagnetic field and laser, catalyzing by using platinum and rhodium, and performing electromagnetic co-permeation heat treatment; carrying out organic post-treatment, heating at 723 ℃ of a co-permeation inflection point, and then putting into organic marurine for quenching; the inner silencing shaft (j1a) of the rear shaft of the mower is hollow and is provided with a plurality of silencing wedges so as to facilitate silencing and noise reduction. The inclined plane (1a) arranged in the universal adjusting knob (1) is a logarithmic curved surface, and has the characteristic of equal pressure angle positions, when a person holds the universal adjusting knob (1) by fingers to adjust, the universal elastic bayonet lock (7) can be pressed down to ensure that the universal single inclined arm (4) and the multi-claw universal wheel (5) can not rotate universally and only move forwards; the universal adjusting knob (1) is provided with a fingerprint identification device and is only operated by a specially-assigned person; the universal single-inclined arm (4) is only provided with a single arm, and the single arm extends out at an angle of 45 degrees so as to reduce grass clipping; the profile of the multi-claw universal wheel (5) is provided with more than 100 multi-claws in the shape of gears to form the multi-claw universal wheel so as to grab grass and reduce slippage; a horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with a motor and a planetary reducer to drive the multi-claw universal wheel (5); the motor and the planetary reducer are three-stage four-planetary-gear reduction gearbox, the three-stage four-planetary-gear meshing gear reduction gearbox is used for the mower, a brushless motor is adopted, and a speed control circuit is arranged; the number of teeth of the motor driving gear (88) is 20; the motor gear with the tooth number of 20 of the motor driving gear (88) is in meshed transmission with four planetary gears (98) on a first-stage planetary carrier of a three-stage planetary system, and the gears are cycloid gears; the four planetary gears (98) with the tooth numbers of 19 and the modulus of 0.6, which rotate and revolve around the common axis along the axis of the motor, are respectively arranged on four planetary gear shafts of a planetary carrier (97) which are equally divided and are equidistant to the common axis; the motor gear with the tooth number of 20 is made of steel 40 Cr; four planet wheels of the planet gear (98) are all made of polyformaldehyde SP 500; the internal gear (99) of the central wheel of the planetary train, which meshes with the planet wheels and whose geometric axis is fixed, is of steel 40Cr, with a modulus of 0.6 and a number of teeth of 60, said planetary gear transmission being of the NGW type, N being the internal gear, G being the common gear between the two gear pairs, W being the external gear; the central output gear on the first-stage planet carrier is in meshing transmission with four planetary gears (98) on the second-stage planet carrier, and the four planetary gears (98) with the tooth number of 19 and the modulus of 0.6, which rotate and revolve around a common axis along the axis of the motor, of the second stage are respectively arranged on four planetary gear shafts of a planet carrier (97) which is equally divided and is equidistant to the common axis; the central output gear on the first-stage planet carrier is made of steel 40Cr, and four planet gears of four planet gears (98) on the second-stage planet carrier are all made of polyformaldehyde SP 500; the internal gear (99) of the central wheel of the planetary train, which meshes with the planet wheels and whose geometric axis is fixed, is of steel 40Cr, the modulus is 0.6, the number of teeth is 60, the classification of the planetary gear transmission is also of NGW type, N is the internal gear, G is the common gear in the middle of the two gear meshing pairs, W is the external gear; the central output gear on the second-stage planet carrier is in meshing transmission with three planetary gears (98) on the third-stage planet carrier, and three planetary gears (98) with the tooth number of 18 and the modulus of 0.6, which rotate and revolve around a common axis along the axis of the motor, of the third stage are respectively arranged on three planetary gear shafts of a planet carrier (97) which is equally divided and is equidistant to the common axis; the central output gear on the second-stage planet carrier is made of steel 40Cr, the number of teeth is 18, the modulus is 0.6, and three planet gears of three planet gears (98) on the third-stage planet carrier are made of steel 40Cr instead of polyformaldehyde SP 500; the internal gear (99) of the central wheel of the planetary train, which meshes with the planet wheels and whose geometric axis is fixed, is of steel 40Cr, the modulus is 0.6, the number of teeth is 60, the classification of the planetary gear transmission is also of NGW type, N is the internal gear, G is the common gear in the middle of the two gear meshing pairs, W is the external gear; the motor is provided with a speed control circuit; a muffler and a radiator are provided outside the internal gear (99) to perform noise reduction and cooling.

The lawn mower with the front-direction left-right follow-up double universal wheels is characterized in that an inclined plane (1a) in a universal adjusting knob (1) is a logarithmic curved surface which has the characteristic of equal pressure angle positions, and when a person holds the universal adjusting knob (1) by fingers to adjust, the person only moves straight ahead; the universal adjusting knob (1) is provided with a fingerprint identification device and is only operated by a specially-assigned person; the universal single-inclined arm (4) is only provided with a single arm, and the single arm extends out at an angle of 45 degrees so as to reduce grass clipping; the profile of the multi-claw universal wheel (5) is provided with more than 100 multi-claws in the shape of gears to form the multi-claw universal wheel so as to grab grass and reduce slippage; a motor and a planetary reducer are arranged on a horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) to drive the multi-claw universal wheel (5), and a silencer and a radiator are arranged outside the internal gear (99) so as to eliminate noise and cool.

The right section of the silencing inner shaft (j1a) is inserted into the right shaft of the rear shaft of the mower for silencing and cooling reference, a plurality of hexagonal cone-shaped silencing wedges are arranged on the silencing inner shaft (j1a), small holes are formed in the tops of the hexagonal cones to serve as silencing holes, the hexagonal cone-shaped silencing wedges arranged on a hollow core pipe of the inner shaft close to one end matched with the rear shaft of the mower are dense, the hexagonal cone-shaped silencing wedges arranged on a hollow core pipe of the inner shaft far away from one end matched with the rear shaft of the mower are sparse, an isolation connecting part is arranged outside the middle of the silencing inner shaft to serve as a matched position of the rear shaft of the mower, one end of the isolation connecting part is connected with one end of the rear shaft close to the grass outlet, and the other end of the isolation connecting part is connected with one end of the rear shaft far away from the grass outlet, so as to refer to the air flow coming from the cutting position close to the grass outlet of the turbulent noise of the Letehl parameters and the Richcz noise, the air flow is compressed at the port close to the right rear wheel and one end close to the grass outlet and then expands to enter the hollow rear shaft, the expanded air flow is recompressed by a plurality of hexagonal pyramid-shaped dense silencing wedges arranged on a hollow pipe of a silencing inner shaft at one end close to the grass outlet of the silencing inner shaft in the hollow rear shaft, and after the air flow slightly runs through the silencing inner shaft, the air flow is recompressed by a plurality of hexagonal pyramid-shaped sparse silencing wedges arranged on the hollow pipe of the silencing inner shaft at one end far away from the grass outlet of the silencing inner shaft and then overflows to the inner through hole at the other end of the silencing inner shaft in the rear shaft again to pass to the outside, so that the processes of silencing and noise reduction are carried out by compression, expansion, recompression and re-expansion; the air is convenient to be introduced outside for cooling; the poking and cutting rod (j1) is provided with a plurality of pieces which are sleeved on the rear shaft, each poking and cutting rod is provided with three blades which are 60 degrees with each other, but the three blades which are 60 degrees with each other of each adjacent poking and cutting rod are staggered by 30 degrees with each other; the sliding cutting angle is 20 degrees, and the included angle between the extending direction of each blade along the radial direction and the backward-inclined cutter relieving of the radial line is 13.5 degrees; the reducer gear (j2), the silencing inner shaft (j1a) and the toggle rod (j1) are metal workpieces, and high-frequency current is used for post-processing by utilizing a skin effect; when the blade hits obstacles such as stones, breakage and gear and engine power damage are easily caused; adopting ultra-thin blade and noise elimination inner shaft which are made of special material and treated by carbon, nitrogen and boron and organic post-treatment, utilizing skin effect to bury metal workpiece in rare earth, using high-frequency current to treat, placing the workpiece or adopting titanium aluminum and rhenium in formed ceramic containing yttrium oxide, rare earth, indium and clay, and matching with homotopic radiation and laser scanning; the blade is subjected to three-dimensional printing by carbon fiber, is edged by a diamond knife, is put into mixed buried soil of nano-scale printing carbon powder, urea and borax for heat treatment, is scanned by a variable frequency electromagnetic field and laser, is catalyzed by platinum and rhodium, and is subjected to electromagnetic co-infiltration heat treatment, so that the space lattice of the blade is dispersed; carrying out organic post-treatment, heating at 723 ℃ of a co-permeation inflection point, placing into horse urine for quenching, washing with clean water, and smearing varnish; the blade can meet the actual grass poking and cutting requirements and has the function of overload protection, so that a pressure protection sensor is arranged, and when the blade is overloaded, the sensor sends out a signal and an overload contact piece of an electromagnet is attracted to enable the blade holder and the blade to slip and automatically avoid rotating; the improved rear axle at the bottom of the lawn mower is driven by the power of a poking and cutting grass discharging channel mechanism or directly by a motor and a speed reducer (108).

Because the lawn mower only has the front universal wheel and does not have the universal wheel with a rolling lock, the lawn mower is difficult to walk straight at a long distance, and an operator can not walk straight easily at the back of a far mower handrail at a left or right direction due to the lever action of the handrail, which is an old and difficult problem, the lawn mower with the front left and right follow-up double universal wheels is previously made, and is characterized in that the front left and right follow-up double universal wheels are symmetrically arranged at the left and right in the front direction of the lawn mower, the follow-up universal wheels comprise a universal adjusting knob (1), a universal upper cover (2), a universal lower cover (3), a universal single inclined arm (4), a multi-claw universal wheel (5), a universal vertical shaft (6), a universal elastic clamping pin (7), a universal clamping pin spring (8) and a universal vertical shaft clamping ring (9), the adjusting knob (1) is arranged above the universal upper cover (2) and the universal lower cover (3), the universal upper cover (2) and the universal lower cover (3) clamp a front frame of the mower, the universal adjusting knob (1), the universal upper cover (2) and the universal lower cover (3) are movably provided with the universal vertical shaft (6), the universal vertical shaft clamping ring (9) is arranged above the universal vertical shaft (6), the universal single-inclined arm (4) is arranged below the universal vertical shaft (6), and the horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with the multi-claw universal wheel (5); the universal elastic bayonet lock (7) and the universal bayonet lock spring (8) which move vertically are arranged in the universal upper cover (2) and the universal lower cover (3), an inclined surface (1a) arranged in the universal adjusting knob (1) is matched with the upper end of the universal elastic bayonet lock (7), the inclined surface (1a) arranged in the universal adjusting knob (1) is a logarithmic curved surface and has the characteristic of equal pressure angle positions, and after the universal adjusting knob (1) is held by fingers of a person to be adjusted, the universal elastic bayonet lock (7) can be pressed down to enable the universal single inclined arm (4) and the multi-claw universal wheel (5) to be straight towards the front without universal rotation; the universal adjusting knob (1) is provided with a fingerprint identification device and is only operated by a specially-assigned person; the universal single-inclined arm (4) is only provided with a single arm, and the single arm extends out at an angle of 45 degrees so as to reduce grass clipping; the profile of the multi-claw universal wheel (5) is provided with more than 100 multi-claws in the shape of gears to form the multi-claw universal wheel so as to grab grass and reduce slippage; a horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with a motor and a planetary reducer to drive the multi-claw universal wheel (5); however, the actual situation is undesirable, and due to the fact that the inclined angle of the original structural design is too steep and the defects of matching with other structures, the universal elastic bayonet lock cannot be pressed down to lock or locked and occasionally fails to open after the universal adjusting knob is held by fingers to be adjusted. The universal adjusting knob (1) is provided with a fingerprint identification device which is supposed to be operated by a specially-assigned person, but the universal adjusting knob fails because weeds mix wet soil. A horizontal front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with a motor and a planetary reducer to drive a multi-claw universal wheel (5), but a power line between the motor and a battery is wound for several 360 degrees sometimes to cause a fault; develop a simple elastic foldable handrail mower without using tools, that is, a mower with rolling lock rotating universal wheels, a mower with folding handrail and standing and a grass collecting box bag, a mower with bent handrail and easy-to-take grass collecting box, and a mower with simple elastic foldable handrail, and a mower with a simple elastic foldable handrail? The conventional side grass discharging plate is an additional separate component, and when the side grass discharging plate is not used, the side grass discharging plate needs to be detached independently and is not placed at a proper position for storage, when the side grass discharging plate needs to be used, the side grass discharging plate needs to be found and installed again, and whether the side grass discharging plate needs to be detached independently or not is difficult, and because the side grass discharging plate extends out of a very occupied space of a machine body chassis at the right side and is difficult to enter a packing box, whether a mower which is easy to place by turning up one side grass discharging plate, a mower which is controlled by wheels to cut wavy patterns and a mower which adjusts the mowing height by a deflector rod or a mower which adjusts the mowing height by a deflector rod and is linked by a stay cable? This is both a market demand and a long-standing problem.

A poking rod heightening disc is a mower linked by a guy cable, a rolling lock is used for rotationally adjusting a universal wheel, and the poking rod heightening disc comprises a universal upper cover (2), a universal lower cover (3), a universal single-inclined arm (4), a multi-claw universal wheel (5), a universal vertical shaft (6), a lock button (11), a lock disc (12), a lock cap (13), a lock spring (14), a lock rod (15), a lock body (16), a positioning pin (17) and a lock pit (4 a); the universal upper cover (2) and the universal lower cover (3) clamp a front frame of the mower, vertical shaft holes are formed in the universal upper cover (2) and the universal lower cover (3), the universal vertical shaft (6) is vertically and movably arranged, the lock knob (11) and the lock disc (12) are arranged above the vertical shaft holes of the universal upper cover (2) and the universal lower cover (3) and above the universal vertical shaft (6), the universal single-inclined arm (4) is arranged below the vertical shaft holes of the universal upper cover (2) and the universal lower cover (3) and below the universal vertical shaft (6), and the horizontal movable steering front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with the multi-claw universal wheel (5); the rolling lock is characterized in that the middle of a lock knob (11) of the rolling lock presses a lock disc (12), the lock disc (12) is provided with a rotating lock and an opening indication, the lock disc (12) is provided with two hooks for clamping, the lock knob (11) is internally provided with a lock cap (13), a lock spring (14) and a lock body (16), the lock body (16) is provided with two positioning pins (17), the end parts of the positioning pins (17) are pointed so as to be positioned with the lock knob (11), the lock body (16) is provided with a section of climbing surface (16a) from low to high, the climbing surface is a catenary and is provided with a plurality of balls so as to be contacted with roller bearings at the opening edge of the periphery of the lower part of the lock cap (13) to control the lock lever (15); the lock rod (15) is arranged below the lock cap (13) and the lock spring (14); the lock rod (15) is offset in parallel with the universal vertical shaft (6), a small shoulder is arranged at the upper part of the lock rod (15) and is provided with the lock cap (13) and the lock spring (14), the lock spring (14) arranged in the lock cap (13) is pressed on a small shoulder arranged at the upper part of the lock rod (15), the inside of the lock button (11) contacts a ball body (13c) arranged on an arc-shaped bulge at the upper part of the lock cap (13), the opening edge of the circumference of the lower part of the lock cap (13) is in contact with the climbing surface (16a) of the lock body (16) through a roller bearing (15c) arranged at the small shoulder, the lock rod (15) penetrates through the universal upper cover (2) and the universal lower cover (3), the lower end of the lock rod (15) is provided with an arc-shaped lock head (15a) with a ball, and the universal single-inclined arm (4) is provided with the lock pit (4 a); when the lock knob (11) is manually screwed for 180 degrees and locked, an arc-shaped lock head (15a) with a ball at the lower end of the lock rod (15) is inserted into a lock pit (4a) arranged on the universal single-inclined arm (4) to be locked so that the mower with wave patterns cut by the wheels moves straight, and when the lock knob (11) is manually screwed for 180 degrees and unlocked, the arc-shaped lock head at the lower end of the lock rod (15) is pulled out of the lock pit (4a) arranged on the universal single-inclined arm (4) to be unlocked so that the height of the mower can be adjusted by the deflector rod; the rear part of the chassis body of the mower is also provided with an armrest seat (18), a lower armrest (19) and an upper armrest (20), when the lower armrest (19) and the upper armrest (20) are folded and the chassis body of the mower is placed in an upright manner, the length of the rear end part of the armrest seat (18) is rightly landed and matched with a rear wheel on the chassis body of the mower to land together in a certain way, so that the chassis body of the mower is stably placed in an upright manner, and a storage place is saved; the total distance from the rear end of the armrest seat (18) to the foremost end of the armrest seat when the armrest seat is placed in the standing state is equal to the diameter of a rear wheel on the chassis body of the mower, and the rotating center of the lower armrest (19) in the folding and rotating process of the armrest seat (18) when the armrest seat is placed in the standing state is equal to the height from the center of a circle of the rear wheel on the chassis body of the mower to the ground; the mower with the mowing height adjusted by the deflector rod can ensure that the chassis body of the mower can be stably placed in a standing mode when the mower is provided with the grass collecting box bag, so that the storage space is saved; the lower handrail (19) is not higher than the rod of the grass collecting bag so that the grass collecting bag can be easily taken out; the wheel-controlled mowing machine for cutting wavy patterns is characterized in that a hole of a left rod at the lower part of a lower handrail (19) is inserted into a transverse pin (22) at the rotating center of a handrail seat (18) on the left side of a machine body, a hole of a right rod at the lower part of the lower handrail (19) is also inserted into the transverse pin (22) at the rotating center of the handrail seat (18) on the right side of the machine body, the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are bent and formed to retain the elastic modulus of metal, can elastically open outwards, are attached to the handrail seat (18) and are firmly clamped by a low side edge of the handrail seat (18) to complete assembly and enable operation, when the mowing machine is required to be retracted, the simple elastic edge of the handrail can be folded inwards only by pressing the left rod and the right rod handrails inwards by about 10 mm and crossing the low side edge of the handrail seat, and the hole of the left rod is still inserted into the transverse pin (22) at the rotating center of the handrail seat (18) on the left side The hole of the right rod at the lower part is still inserted into a transverse pin (22) at the rotating center of a handrail seat (18) at the right side of the machine body, the hole of the left rod and the hole of the right rod are both arranged at the lower part of a flattened lower handrail (19) with the thickness of about 5 mm, and the extending length of each transverse pin (22) which is opposite is about 20-40 mm, which is enough for the handrail to be simply folded inwards elastically; the end of each transverse pin (22) is provided with an open elastic washer so as to block and prevent falling off; the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are taken down on a bending machine and then are immediately placed on a drying kiln conveyor belt to pass through one so as to ensure that the elastic modulus of the metal is kept after forming, and more elasticity is provided for opening outwards; a grass mower with a shifting lever for adjusting the mowing height is characterized in that a grass discharging pressure plate with an elastic hinge and a side grass discharging plate which needs to be additionally taken and placed and fixedly arranged on a chassis are combined into a side grass discharging plate (23) above a right grass discharging opening of the chassis of a mower body, the side grass discharging pressure plate only needs to be placed on the chassis and does not need to be additionally taken, placed and detached, the side grass discharge plate (23) shortens the pressing plate of the conventional grass discharge pressing plate with the elastic hinge to 20-30 mm, and the upper plate surface of the side grass discharging plate is arranged at an angle of about 80 to 110 degrees with the surface of the pressing plate to form the side grass discharging plate, so that the side grass discharge plate can be easily put into the packing box when turned upwards and can be easily put down to discharge grass when turned downwards, the front side and the rear side of the upper plate surface of the side grass discharge plate are respectively provided with a front grass discharge guard plate and a rear grass discharge guard plate which are approximately perpendicular to the upper plate surface; the wheel of the mower is set as a polygonal wheel (24), and when the mower runs, the mower can move with the mowing knife to mow and cut the wavy patterns to beautify the lawn by rolling up and down. A mower with a mowing height adjusted by a shifting lever is provided with a height-adjusting shifting lever (25) and a height-adjusting disc (26) between a chassis and wheels, wherein the height-adjusting shifting lever (25) is elastic and is provided with a rectangular notch so as to be shifted to any one of a plurality of gears arranged on the height-adjusting disc (26), and the gears are formed by cutting two long sides of the punched rectangular notch and breaking two short sides to form bulges which are rectangular in front view and arc in side view; the heightening shift lever (25) is also provided with a pull rope (27) so as to gather and connect a pull rope reel beside the upper armrest to control heightening.

Has the advantages that: the effect is obvious, and all the outlets are provided. The lawn mower has the advantages that the lawn mower is not easy to walk straight only by the front universal wheels, the chassis body of the lawn mower can be stably placed when the lawn mower is provided with the grass collecting box bag without disassembling, the storage place is saved, the length of the rear end part of the armrest seat (18) is exactly landed, and the rear end part of the armrest seat and the rear wheel on the chassis body of the lawn mower are landed together in a fitting manner; when in locking, the arc-shaped lock head (15a) with the ball at the lower end of the lock rod (15) is inserted into the lock pit (4a) to be locked, and reliable locking is provided for the rolling mechanism by reliably changing sliding; the handle (19) is changed to be a rod not higher than the grass collecting bag so that the grass collecting bag can be easily taken out. When the lock button (11) is manually screwed for 180-degree locking, the arc-shaped lock head (15a) with the balls at the lower end of the lock rod (15) is inserted into the lock pit (4a) on the universal single-inclined arm (4) to be locked, the slope climbing surface (16a) which is involute or hyperbolic and is provided with a plurality of balls is reliably changed into rolling from low to high, the effect is obvious, and the old and difficult problem that the lawn mower with the lock is occasionally out of order and clamped is solved. The old and difficult problem that the simple elastic inward-folded mower with the handrail can be used without tools is solved by skillfully utilizing the rebound opening effect left by the bent pipe. The rear part of the chassis body of the mower is also provided with an armrest seat (18), a lower armrest (19) and an upper armrest (20), when the lower armrest (19) and the upper armrest (20) are folded and the chassis body of the mower is placed in an upright manner, the length of the rear end part of the armrest seat (18) is exactly landed and matched with a rear wheel on the chassis body of the mower in a certain way to be landed together so that the chassis body of the mower is stably placed in an upright manner and is saved in storage; the total distance from the rear end of the armrest seat (18) to the foremost end of the armrest seat is equal to the diameter of a rear wheel on the chassis body of the mower when the armrest seat is placed in an upright mode, and the rotating center of the lower armrest (19) in the folding and rotating mode of the armrest seat (18) is equal to the height from the center of a circle of the rear wheel on the chassis body of the mower to the ground when the armrest seat is placed in an upright mode; the simple elastic inward folding mower with the handrails comprises a lower handrail (19), a left rod hole at the lower part of the lower handrail is inserted into a transverse pin (22) at the rotating center of a handrail seat (18) at the left side of a machine body, a right rod hole at the lower part of the lower handrail (19) is also inserted into a transverse pin (22) at the rotating center of a handrail seat (18) at the right side of the machine body, the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are bent and formed to retain the elastic modulus of metal, can elastically open outwards, are attached to the handrail seat (18) and clamped by a low side wall of the handrail seat (18) to be assembled firmly to enable operation, and when the simple elastic inward folding mower is required, the left rod and the right rod are pressed inwards by a left handle for about 10 mm to cross the low side wall of the handrail seat, the elastic inward folding handrail can be realized, and the left rod hole is still inserted into the transverse pin (22) at the rotating center of the handrail seat (18) at the left side of the machine body The hole of the right rod at the lower part of the hand (19) is still inserted into the transverse pin (22) at the rotating center of the armrest seat (18) at the right side of the machine body, the hole of the left rod and the hole of the right rod are both arranged at the lower part of the flattened lower armrest (19) with the thickness of about 5 mm, and the extending length of each opposite transverse pin (22) is about 20-40 mm, which is enough for the armrest to be simply folded elastically inwards; the end of each transverse pin (22) is provided with an open elastic washer so as to block and prevent falling off; the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are taken down on a bending machine and then are immediately placed on a drying kiln conveyor belt to pass through one step so as to ensure that the elastic modulus of the metal is kept after forming, and more elasticity is required to be expanded outwards. A grass cutter with a side grass discharging plate which can be turned upwards and easily placed is innovatively characterized in that a conventional grass discharging pressing plate with an elastic hinge and a side grass discharging plate which needs to be taken out and placed are combined into a side grass discharging plate (23) above a right grass discharging opening of a chassis of a machine body of the grass cutter, the side grass discharging plate is only required to be placed on the chassis and is not required to be taken out and placed, the side grass discharging plate (23) shortens the pressing plate of the grass discharging pressing plate with the elastic hinge to be 20-30 mm, the upper plate surface of the side grass discharging plate is arranged at an angle of 80-110 degrees with the surface of the pressing plate to form the side grass discharging plate, the upper plate surface of the side grass discharging plate is arranged at an angle of about 80-110 degrees to form the side grass discharging plate, the side grass discharging plate can be placed into a packing box easily when the side grass discharging plate is turned upwards, and the side grass discharging plate can be placed down easily to discharge grass when the side grass discharging plate is turned downwards, the front side and the rear side of the upper plate surface of the side grass discharge plate are respectively provided with a front grass discharge guard plate and a rear grass discharge guard plate which are approximately perpendicular to the upper plate surface; the shifting lever is used for adjusting the mowing height of the mower, the wheels of the mower are polygonal wheels (24), and when the mower walks, the mower can move the mowing knife to mow and cut wavy patterns to beautify the lawn by swinging up and down. A mower with a grass cutting height adjusted by a shifting lever and a mower with a shifting lever and a shifting lever heightening disc linked by a guy cable are provided, wherein a heightening shifting lever (25) and a heightening disc (26) are arranged between a chassis and wheels, the heightening shifting lever (25) is elastic and is provided with a rectangular notch so as to shift to any one of a plurality of gears arranged on the heightening disc (26), and the gears are formed by cutting two long edges of a punched rectangular notch without breaking two short edges to form bulges which are rectangular in front view and arc in side view; the heightening shift lever (25) is also provided with a pull rope (27) so as to gather and connect a pull rope reel beside the upper armrest to control heightening.

If the elasticity is to be improved, the workpiece can be heightened, the deflector rod is heated at 723 ℃ of a co-permeation inflection point, then urine-containing organic natural substances are put into the workpiece to be harder outside and softer inside than other substances for better use, and the internal mechanism of atoms for post-treatment by the organic natural substances is still to be researched by human beings, but the internal mechanism has an objective function. The lock body (16) is provided with a section of climbing surface (16a) from low to high, which is a catenary and is provided with a plurality of balls, thus having remarkable effect.

Claims (1)

1. A poking rod heightening disc is a mower linked by a guy cable, a rolling lock is used for rotationally adjusting a universal wheel, and the poking rod heightening disc comprises a universal upper cover (2), a universal lower cover (3), a universal single-inclined arm (4), a multi-claw universal wheel (5), a universal vertical shaft (6), a lock button (11), a lock disc (12), a lock cap (13), a lock spring (14), a lock rod (15), a lock body (16), a positioning pin (17) and a lock pit (4 a); the universal upper cover (2) and the universal lower cover (3) clamp a front frame of the mower, vertical shaft holes are formed in the universal upper cover (2) and the universal lower cover (3), the universal vertical shaft (6) is vertically and movably arranged, the lock knob (11) and the lock disc (12) are arranged above the vertical shaft holes of the universal upper cover (2) and the universal lower cover (3) and above the universal vertical shaft (6), the universal single-inclined arm (4) is arranged below the vertical shaft holes of the universal upper cover (2) and the universal lower cover (3) and below the universal vertical shaft (6), and the horizontal movable steering front half shaft arranged at the lower end of the universal single-inclined arm (4) is provided with the multi-claw universal wheel (5); the rolling lock is characterized in that the middle of a lock knob (11) of the rolling lock presses a lock disc (12), the lock disc (12) is provided with a rotating lock and an opening indication, the lock disc (12) is provided with two hooks for clamping, the lock knob (11) is internally provided with a lock cap (13), a lock spring (14) and a lock body (16), the lock body (16) is provided with two positioning pins (17), the end parts of the positioning pins (17) are pointed so as to be positioned with the lock knob (11), the lock body (16) is provided with a section of climbing surface (16a) from low to high, the climbing surface is a catenary and is provided with a plurality of balls so as to be contacted with roller bearings at the opening edge of the periphery of the lower part of the lock cap (13) to control the lock lever (15); the lock rod (15) is arranged below the lock cap (13) and the lock spring (14); the lock rod (15) is offset in parallel with the universal vertical shaft (6), a small shoulder is arranged at the upper part of the lock rod (15) and is provided with the lock cap (13) and the lock spring (14), the lock spring (14) arranged in the lock cap (13) is pressed on a small shoulder arranged at the upper part of the lock rod (15), the inside of the lock button (11) contacts with a ball body (13c) arranged on an arc-shaped bulge at the upper part of the lock cap (13), the opening edge of the circumference of the lower part of the lock cap (13) is in contact with the climbing surface (16a) of the lock body (16) through a roller bearing (15c) arranged at the small shoulder, the lock rod (15) penetrates through the universal upper cover (2) and the universal lower cover (3), the lower end of the lock rod (15) is provided with an arc-shaped lock head (15a) with a ball, and the universal single-inclined arm (4) is provided with the lock pit (4 a); when the lock button (11) is manually screwed for 180 degrees and locked, an arc-shaped lock head (15a) with a ball at the lower end of the lock rod (15) is inserted into a lock pit (4a) arranged on the universal single-inclined arm (4) to be locked so that the shifting rod heightening disc moves straight by the inhaul cable linkage mower, and when the lock button (11) is manually screwed for 180 degrees and unlocked, the arc-shaped lock head at the lower end of the lock rod (15) is pulled out of the lock pit (4a) arranged on the universal single-inclined arm (4) to be unlocked so that the shifting rod heightening disc can freely turn by the inhaul cable linkage mower; the rear part of the chassis body of the mower is also provided with an armrest seat (18), a lower armrest (19) and an upper armrest (20), when the lower armrest (19) and the upper armrest (20) are folded and the chassis body of the mower is placed in an upright manner, the length of the rear end part of the armrest seat (18) is rightly landed and matched with a rear wheel on the chassis body of the mower to land together in a certain way, so that the chassis body of the mower is stably placed in an upright manner, and the storage place is saved; the total distance from the rear end of the armrest seat (18) to the foremost end of the armrest seat when the armrest seat is placed in the standing state is equal to the diameter of a rear wheel on the chassis body of the mower, and the rotating center of the lower armrest (19) in the folding and rotating process of the armrest seat (18) when the armrest seat is placed in the standing state is equal to the height from the center of a circle of the rear wheel on the chassis body of the mower to the ground; the shifting lever heightening disc is linked with the mower by the inhaul cable, and the body of the chassis of the mower can be stably placed in a standing mode when the mower is provided with the grass collecting box bag, so that the storage area is saved; the lower handrail (19) is not higher than the rod of the grass collecting bag so that the grass collecting bag can be easily taken out; the shifting rod heightening disc is the grass mower linked by the inhaul cable, a hole of a left rod at the lower part of a lower handrail (19) is inserted into a transverse pin (22) at the rotating center of a handrail seat (18) at the left side of a machine body, a hole of a right rod at the lower part of the lower handrail (19) is also inserted into the transverse pin (22) at the rotating center of the handrail seat (18) at the right side of the machine body, the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are bent and formed, the elastic modulus of metal is kept, the metal can elastically open outwards, the left rod and the right rod are attached to the handrail seat (18) and clamped by a low side edge of the handrail seat (18) to be assembled and enable operation, when the grass mower needs to be folded, the left rod and the right rod handrail are pressed inwards by about 10 mm to cross the low side edge of the handrail seat, the simple elastic inwards folded handrail can be folded, and the hole of the left rod is still inserted into the transverse pin (22) at the rotating center of the handrail seat ( The hole of the right rod of the part is still inserted into a transverse pin (22) of the rotation center of a handrail seat (18) on the right side of the machine body, the hole of the left rod and the hole of the right rod are both arranged at the lower part of a flattened lower handrail (19) with the thickness of about 5 mm, and the extending length of each opposite transverse pin (22) is about 20-40 mm, which is enough for the handrail to be simply and elastically folded inwards; the end of each transverse pin (22) is provided with an open elastic washer so as to block and prevent falling off; the left rod at the lower part of the lower handrail (19) and the right rod at the lower part of the lower handrail (19) are taken down on a bending machine and then are immediately placed on a drying kiln conveyor belt to pass through one so as to ensure that the elastic modulus of the metal is kept after forming, and more elasticity is provided for opening outwards; a grass cutter with a deflector rod heightening disc linked by a stay cable is characterized in that a grass discharging pressure plate with an elastic hinge and a side grass discharging plate needing to be additionally taken and placed which are fixedly arranged on a chassis are innovatively combined into a side grass discharging plate (23) above a right grass discharging port of the chassis of a mower body, the side grass discharging plate is only required to be placed on the chassis and is not required to be additionally taken, placed and detached, the side grass discharge plate (23) shortens the pressing plate of the grass discharge pressing plate with the elastic hinge to 20-30 mm, and the upper plate surface of the side grass discharging plate is arranged at an angle of about 80 to 110 degrees with the surface of the pressing plate to form the side grass discharging plate, so that the side grass discharge plate can be easily put into the packing box when turned upwards and can be easily put down to discharge grass when turned downwards, the front side and the rear side of the upper plate surface of the side grass discharge plate are respectively provided with a front grass discharge guard plate and a rear grass discharge guard plate which are approximately perpendicular to the upper plate surface; the shifting lever heightening disc is a mower linked by a guy cable, the wheel of the mower is set to be a polygonal wheel (24), and when the mower runs, the mowing knife is linked to mow and cut wavy patterns to beautify the lawn by rolling up and down; a mower with a mowing height adjusted by a shifting lever is provided with a height-adjusting shifting lever (25) and a height-adjusting disc (26) between a chassis and wheels, wherein the height-adjusting shifting lever (25) is elastic and is provided with a rectangular notch so as to be shifted to any one of a plurality of gears arranged on the height-adjusting disc (26), and the gears are formed by cutting two long sides of the punched rectangular notch and breaking two short sides to form bulges which are rectangular in front view and arc in side view; the heightening shift lever (25) is also provided with a pull rope (27) so as to be connected to the pull rope reel in a gathering way to control heightening.

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