CN110537413A

CN110537413A - riding machine for lawn mowing in garden

Info

Publication number: CN110537413A
Application number: CN201910638080.6A
Authority: CN
Inventors: 叶晓波; 其他发明人请求不公开姓名
Original assignee: Ningbo Daye Garden Equipment Co Ltd
Current assignee: Ningbo Daye Garden Equipment Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2019-12-06

Abstract

A riding machine for lawn mowing in garden operation is provided, wherein a balance swivel base (7) is arranged in the middle of a grass collecting box frame (50), and a left grass scale plate (8) and a right grass scale plate (9) form a shunting cone; when the left grass box (5) has more grass and is inclined downwards, the grass enters the right grass box (6) to supply more adding points under the influence of the fact that the acute angles of the door plates of the valves of the shunting cones are deviated to the left and are guided by the right grass scale plate (9); the balance of the left grass box and the right grass box is automatically adjusted in cycles; the grass feeding device is provided with a flexible suspension auger (10 a); the engine for the riding machine comprises silica gel shock pads (54a), functional muffling pipes (54d), small pipes of auxiliary muffling pipes (54g), fish scale wedges (54e) and variable cross-section air pipes (54 f); the exhaust port of the engine cylinder is connected, and the common chamfer angle of the pin hole is not needed at the inlet of the piston pin end of the engine piston, so that the energy conservation and emission reduction are facilitated.

Description

Riding machine for lawn mowing in garden

Technical Field

The invention relates to a lawn mower and a lawn mower for trimming lawns in places such as courtyards, parks, sides of roads, court places and the like, in particular to a riding machine for trimming lawns in garden operation.

Background

The riding mower originally only has one rear large grass collecting box which is too heavy and inconvenient to take down, so that two left and right double grass boxes are changed, but the problem comes, the grass in the left and right double grass boxes is always more on one side and less on the other side; the problems that how to adjust the riding machine balanced by the left and right double grass boxes, how to send grass to the high double grass boxes from the chassis and how to reduce noise and eliminate noise of the engine are troublesome are solved after a plurality of schemes are not ideal, and the inventor wishes to take part in innovation by domestic and foreign student work experience to throw bricks and draw jade.

lawn mowers are widely used to mow grass in a manner that is selected according to people's preference, and that is sometimes self-propelled and sometimes non-self-propelled. The operator pulls the self-propelled control handle to engage and disengage the clutch via the wire rope and the shift lever, so that the operator sometimes does not self-propel. The driving gear speed reducing clutch of the self-propelled mechanism in the prior art is driven by a belt pulley arranged on a main shaft of an engine. The engine spindle mowing device is shown in an exploded view of the engine spindle mowing device in figure 5 and comprises a driving belt pulley (11), a cushion cover (12), a key (13), a tool apron (14), a mowing tool (60), a large-pressure washer (16) and a fastening bolt (17); generally, a tool holder is indispensable. The conventional mowing device is more and more expensive in parts; the weight is also heavier, the rotational inertia is larger, and the consumed power is more; and the knife is rigidly connected, and is hard to touch when meeting sundries such as water pipes, and has no safety protection. The side surface of the common single knife is only provided with the edge without teeth, the edge is easy to , and the common single knife is often torn when the stem is not cut well; especially, the end surface along the circumference has no teeth, and the end surface has high rotating speed at the circumference part and strong cutting function, so the end surface of the common single knife has no teeth, which is a great loss to cutting energy.

because the manual mower has poor maneuvering performance, the cutting width of the front part of the mower is narrow, repeated cutting and missed cutting often occur, the additional cutting is needed, and the operator is hard to walk to cut grass. When the riding mower is used, the riding mower has a different feeling of sitting than standing but has a loud noise. Because the double knives of the riding mower are synchronous, the blade self-clutching can not be carried out on only one knife.

mufflers are widely used as muffling devices for internal combustion engines, particularly small gasoline engines, and are mounted on exhaust ports of cylinder heads to reduce noise during operation of the engines. Various countries around the world have associated limits for noise in various types of moving vehicles and lawn mowers, and exhaust mufflers are such devices that are designed to reduce exhaust noise. The performance evaluation of the silencer mainly has the indexes of acoustic performance, aerodynamic performance, structural performance and the like. A considerable part of the internal combustion engine belongs to a pulsating low-frequency noise source, and a reactive or impedance complex and a micropore plate silencer are mostly adopted. The common silencer of the internal combustion engine, particularly the silencer used for a small gasoline engine, is mostly a three-cavity silencer, and has limited silencing effect; and the outside needs to be provided with a larger protective outer cover, but the outer cover does not have the noise elimination effect. Moreover, the temperature of the shell is high, which causes the hair to be hot and affects the safety. If the silencing groove is added, the improvement is achieved. It is also important to improve the noise reduction and wear reduction of mowing devices and knives.

The foot protection standard has relevant requirements. The mowing height of most mowers is adjustable in multiple steps, which requires strict safety regulations for the feet of pedestrians to operate. However, the artificial foot test needs more measurement every day, and the number of covered articles is too small. So that if there are already delivered mowers and the individual is not sure that the foot is not at all, the mower order is totally affected. The idea behind the improvement is often to raise the mower blade a few millimeters above the chassis. But the cutter is difficult to ensure that the height is not lower than a circumferential plane; in case of accident, it is difficult to avoid, but it is also necessary to ensure that there is no safety problem for all the stations. If the grass cutting table and grass cutter are improved by using noise reduction materials and the cutter is improved, the effects of security and noise reduction can be expected.

In order to avoid the cutting missing phenomenon caused by the adjacent gaps of the two cutters, the two cutters of the original riding type mower usually have the strip shapes of the two cutters which are arranged in front of each other and behind each other, are mutually perpendicular and reversely rotate so as not to interfere with each other; the double-sided V-shaped belt and the three tension wheels are used, and the main defects are that the front and the back of a cutting disc are enlarged due to the fact that the front and the back of a cutter are arranged, the front and the back wheel distances are enlarged, the whole machine is lengthened, the turning radius of the machine is enlarged, the longitudinal potential stability coefficient is poor, and the cost is increased, which are not desirable. The other two knives of the original riding type mower are not in tandem, but are reversely rotated so as not to interfere with each other, a double-sided synchronous belt is used, and two synchronous tension wheels are also used, so that the cost is increased.

when the utility model is used for mowing, the knife is sometimes damaged by stones. According to the specification of a blade test, a No. 45 steel material, a seamless steel pipe with the diameter of 30mm and the wall thickness of 3mm extends into a blade cutting area, is not allowed to be broken, but can be bent, so that the blade self-clutch mower which is improved by us is inspired, and the blade self-clutch mower is also inspired by us to be a multi-section flail knife and a protected knife. Engine noise reduction is also important.

Disclosure of Invention

scientific improvements are continuously perfected and endless. The multiple cutters are changed, and then a plurality of parts related to the self-clutching of the cutters are changed.

In order to overcome the defects that the conventional mowing device in the prior art of the lawn mower has more parts, larger rotational inertia, more consumed power, rigid connection of the cutter and no safety protection, the invention provides the improvement of the cutting mechanism of the lawn mower, which is a cutter without an independent cutter holder for the lawn mower, namely a mowing cutter without the cutter holder for the lawn mower, and the improvement can reduce the parts and reduce the manufacturing cost of ; secondly, the weight is reduced, and the power consumption is reduced; thirdly, the device has the function of safety protection. In order to make up for the side surface of the common single knife only has edges without teeth, the edges are easy to , and the common single knife is often torn when the stem is not cut well; the invention provides a multi-tooth grass cutter for lawn mower, which improves the length of the cutting edge more than single cutter, has multiple folding edges and multiple cutting and sliding angles, is beneficial to enhancing the efficiency of cutting straw and straw, and has a bow-back type bottom grinding structure of the bottom cutting edge, thereby leading the bottom cutting edge to have self-grinding and wear-resisting durability, and saving power consumption because the multiple teeth are sharper than the original single cutter.

Because the method is formed step by step, the technical method adopted by the invention for solving the technical problem firstly says the basic scheme and then says the scheme.

The method is an ingenious combination of two types of connection modes, namely, a heavy tool apron is omitted, and a steel plate of the tool is directly stamped for forming connection; or made by welding and gluing, namely the cutter without an independent cutter holder is a cutter holder and a cutter which are combined into a whole, and a safety protection key is arranged on the cutter holder, so the cutter can be generally called as a mowing cutter for a lawn mower without the cutter holder.

a mowing device of an engine spindle, in particular to a mowing knife for a lawn mower without a knife holder, wherein a concave pit (2), a key (1) and a key slot (3) are arranged on a steel plate of the knife in the placing position area of the engine spindle and a fastening bolt (17), as shown in figures 5, 6, 7 and 8; the method is characterized in that: the inner diameter of the pit (2) is equal to or slightly larger than the outer diameter of the main shaft of the engine in tolerance, and the middle of the bottom of the pit (2) is provided with a hole for allowing a fastening bolt (17) to pass through; the key placement position area of the edge of the pit (2) is provided with a key (1), and the key placement position area is characterized in that: the key (1) is rectangular and is formed by stamping and bending a steel plate of a knife by using materials, or is formed by welding or gluing, or is formed by using a non-steel key, such as an aluminum key or a plastic factory key, and two side surfaces and at least one side surface of the square section of the key are arranged and clamped in a key groove of an engine spindle; the root of the key (1), namely the connection parts of the key (1) and the steel plate of the knife and the edge of the pit (2) at the position area for arranging the key, are provided with punched and bent crack-stopping grooves so as to correctly select proper shearing strength, so that the grass can be mowed through the key, and the root of the key can be overloaded and protected when the key is in contact with a water pipe. The method for correctly selecting the appropriate shear strength is briefly described as follows: the root of the key (1) can be manufactured by a secondary wall crack arrest method. A minor wall refers to a sheet metal wall that is connected to other thin walls to be considered a child of the major wall. The crack-stopping groove at the root of the key is provided with a crack-stopping groove, is not provided with a crack-stopping groove, extends to form a crack-stopping groove, is rectangular, is oblong, and is preferably selected from the crack-stopping grooves. The computer bending machine and the PROE are suggested, a system default equation can be used, and a Y factor or a K factor is used; or using a predefined bending table; or with a custom bending gauge; material properties and compensation are taken into account by the system. If a customized bending form is not assigned to the sheet metal part, the deployment length can be calculated using the following formula:

L＝(π/2xR+YxT)xθ/90，

Wherein L is the developed length of the key; r is the inside radius of the bond; the Y factor may be 0.5; t is the thickness of the steel plate, and the edge folding and the multiple bulges can improve the modulus of material mechanics and reduce the thickness of the steel plate; theta is a bending angle and can be selected from 80-100. The Y-factor and the K-factor are part constants defined by the position of the neutral bend line in terms of the relative thickness of the sheet metal part material. The K factor is the ratio between the distance (δ) from the neutral bend line to the inside bend radius and the material thickness (T), and has the formula K ═ δ/T. The Y factor is the ratio of the length of the neutral bending line to the material thickness (T), and the formula is Y ═ Kx (pi/2). Text and HTML sheet metal report can be accessed and the accuracy of the sheet metal can be set. The other method for selecting proper shear strength is a practice proving method, wherein no wheel is a punched and bent crack-stopping groove or is manufactured by welding or gluing at the root of the key (1), namely the connecting part of the key (1) with the steel plate of the knife and the edge of the pit (2) in the position area for arranging the key, and practice proves that if the strength is still too high, a material-reducing digging method is adopted, namely the material is dug at the root of the key to ensure that the section of the root part of the key is thinned so as to select proper shear strength. The key groove (3) is characterized in that a key groove with the same width as that of a key groove of a main shaft of an engine is arranged in a position area of the edge of the concave pit (2) for placing a common key (13), and the key groove is spare for some occasions, such as adding a semicircular key, such as adding a spare key. The middle part of the steel plate of the knife needs to be edged and folded and a plurality of bulges are arranged to enhance the thinning.

as different styles, or at the connecting part of the position area of the edge of the pit (2) where the key is arranged, a key (1) is arranged, and the other side is provided with a key slot (3); the middle of the concave pit is provided with a through hole (18). Or at the connecting part of the position area of the edge of the concave pit (2) for placing the key, a key groove (3) is arranged on two sides (at least one side); the middle of the concave pit is provided with a through hole (18). Or the concave pit is omitted, and a key groove square hole is arranged on one side of the connecting part of the position area of the edge of the original concave pit (2) for placing the key; a through hole (18) is still arranged in the middle of the original pit. Or the concave pit is omitted, and a key groove square hole is arranged on one side of the connecting part of the position area of the edge of the original concave pit (2) where the key is arranged, and the key is arranged on the other side of the connecting part, wherein the key is fixed, such as welding and pasting, or is a movable additional key, and particularly the key is locally reduced to be suitable for the requirement of required safety strength; a through hole (18) is still arranged in the middle of the original pit.

In order to make up for the side surface of the common single knife only has edges without teeth, the edges are easy to , and the common single knife is often torn when the stem is not cut well; in particular, the peripheral end face of the cutter has no teeth, and the end face has high rotating speed and strong cutting function at the peripheral part, so that the end face of the common single cutter has no teeth, which is a defect of great loss of cutting energy, and the invention improves for many years, for example, materials such as 65Mn, such as 40MnB, heat treatment such as carburizing and nitriding, mechanisms such as single cutter, multiple cutters, fixed cutters, movable cutters, shapes such as flat cutter, folding cutter, bent cutter, blackening and spray black plastic, seated and unseated, such as the mowing cutter for the lawn mower without the cutter seat, and particularly provides a multi-tooth mowing cutter for the lawn mower, and refer to fig. 8. The multi-tooth mowing knife for the lawn mower mainly comprises a plurality of teeth (24) on the side, a plurality of teeth (25) on the top, a plurality of teeth (26) on the end, a wind wing cutting edge (27), a through hole (18) in the middle of a knife body, a key (1), a pit (2) and a key groove (3); the utility model is characterized in that the side multiple teeth (24) are arranged on the side surface of the steel plate of the cutter body, namely the original blade, and a plurality of teeth, at least 1, or more than a hundred, such as 16, are arranged on one side surface of the steel plate in the advancing direction of the rotation of the mowing cutter by taking the middle through hole (18) of the cutter body as a reference. If the number of teeth is less, the side is preferentially close to the outermost end of the rotating circumference; and at the outermost end of the circumference of rotation, said end teeth (26) are provided, at least 1, or up to tens, for example 3; the top teeth (25) are provided at the junctions of the side teeth (24) and the end teeth (26). The cross sections of the side multiple teeth (24), the end multiple teeth (26) and the top teeth (25) have the common characteristic of teeth, namely, the cross section of each tooth has an arch back which is formed by punching and stretching a steel plate, the steel plates on two sides of the arch back have certain angles, and the bottom of the arch back is ground flat, namely, a cutting edge is ground. In addition, the common edge characteristics of the teeth of the side teeth (24), the end teeth (26), and the top teeth (25) are such that each of the teeth has sides with sharp corners; and the two sides or at least one side is provided with a cutting edge; sharp or rounded corners, intersecting less sharp corners, but roughly shaped with teeth having small heads and large roots; the sides of the teeth are either straight bevel edges or curved, or saw tooth shaped, or convex curved, or concave curved, in particular the sides of the teeth are curved, preferably involute shaped. The wind wing of the knife is provided with the wind wing cutting edge (27), and the knife is characterized in that the wind wing is provided with at least one or more gaps, such as 4 gaps, and the edge of each gap is also provided with the cutting edge (27) so as to cut off the entangled grass; the wind fins of the knife can be provided with non-circular through holes (28) of the wind fins, and the number of the non-circular through holes is at least one or as many as hundreds, such as 6, so that the auxiliary function of noise reduction is facilitated. Or a honeycomb with wind wings is arranged on the wind wings of the knife; at least one, or up to dozens, such as 6, of the wind fin honeycombs is used for facilitating the auxiliary effect of noise reduction; particularly, the honeycomb with the wind fins is in a convex shape, a conical shape or a pyramid shape, particularly a hexagonal pyramid shape, and the middle part of the honeycomb with the wind fins is provided with a through hole, so that the honeycomb with the wind fins has a good noise reduction effect. The multi-tooth cutter has the beneficial effects that: the multi-tooth cutter greatly increases the length of the cutting edge compared with a single cutter, and has multiple folding edges and multiple cutting and sliding angles; the cut object is flexible, grass is more in single edge, the single edge is easy to blunt, and a large amount of grass is torn and broken; the multi-folding blade has stronger grass raking function, is beneficial to enhancing the efficiency of cutting the grass stalks and straws, and the bow-back type bottom grinding structure of the bottom blade has wear resistance and saves power consumption. The wind fin non-circular holes and the wind fin honeycomb on the wind fins of the knife have the auxiliary function of noise reduction.

The improvement is endless. The function wave blade self-clutch riding mower is improved on the basis of a riding mower with noise reduction measures and hydraulic stepless speed change, so that the above-mentioned improvement is simplified, and the improved function wave blade self-clutch part is described in detail. The noise-reducing mowing device is arranged below a frame of the riding mower and comprises a height adjusting part and a mowing part; the height adjusting part is composed of a front fixed shaft and a rear fixed shaft which are arranged on a frame, a front movable shaft and a rear movable shaft which are arranged on a cutting disc (58) and a rod piece connected with the front fixed shaft and the rear movable shaft, as well as a steel wire rope, a sector gear, a pawl and a height adjusting handle which are used for pulling, wherein the front fixed shaft and the rear fixed shaft which are arranged on the frame, the front movable shaft and the rear movable shaft which are arranged on the cutting disc are four vertexes of a parallelogram, and the corresponding sides of the four vertexes are parallel and equal in pairs, so that no matter how the steel wire rope is pulled by the height adjusting handle, a plurality of height adjusting gears are provided by the sector gear and the pawl, and the connecting line of the front fixed shaft and the rear fixed shaft on the frame is always parallel to the front movable shaft and the rear movable shaft on the cutting disc, thereby basically ensuring the vertical translation of the cutting disc; the sector gear has a plurality of teeth, preferably 10 teeth, and has 10 steps, for example, it can be adjusted at a height of 10-100mm, or as usual 25-85 mm. 4 rollers (59) are arranged around the cutting disc (58), and the new addition is as follows: preferably, said 4 rollers (59) are inflated with a soft glue, making it soft, so as to cushion the ground and assist the cutting disc (58). The power of the mowing part is transmitted to the first cutter holder from an engine spindle (51) through a belt (61b) and then transmitted to the second cutter holder through a synchronous belt (63) so as to drive the mowing cutter (60) to work; the grass cutter (60) can be provided with two or more wind wings, a plurality of cutting edges are arranged on the wind wings for cutting off entangled grass, and the included angle of the two surfaces of the cutting edges is not a right angle, and is preferably an angle less than 60 degrees or an acute angle; the mowing knife (60) can be provided with a plurality of hexagonal holes, or the mowing knife (60) can be provided with a plurality of convex-concave parts such as honeycomb or wedges (29) so as to change the sound frequency of high-speed micro air flow passing through the knife, namely reduce noise.

A graphical design and preferred thinking approach of a mowing portion of a mowing device specifically provided with noise reduction is an important contribution to the present invention. As mentioned above, the original scheme of the riding mower with two cutters in tandem uses a double-sided V-shaped belt and three tensioning wheels, and the cutter is enlarged in the front and back direction, so that the whole mower is lengthened. The other two knives of the original riding type mower are not arranged in front of each other, but are reversely rotated, so that a relatively expensive double-sided synchronous belt is used, and two synchronous tension wheels are also used, so that the cost is increased. How can two knives be found, not in tandem, without enlarging the front and back of the cutting disc, without reversing the rotation, without using expensive double-sided synchronous belts, without grass leakage, and without knife collision? The answer is affirmative. The preferred method is illustrated graphically: taking the distance between two tool tips of the strip-shaped tool (20) as the diameter D, drawing 2 circles according to the central distance of rotating shafts of the two tools as A, wherein the intersected front part of the two circles is represented by filled hatching, and the width B is the heavy mowing width B of the grass without leakage; then, the diameter A is used as a circle, the circumferential angle is always a right angle, and because two cutters are arranged to mutually hang and synchronously rotate, the two cutters are two sides of the circumferential angle; there is the formula: b ═ D-a. Changing A, firstly, according to a preferred method of 0.618, drawing, and then gradually increasing A until the maximum is close to D, wherein the cutter center distance A is 0.618D; the maximum re-cutting width B and the minimum A when the knife is in quick collision are obtained. A influences the size of the cutting disc (58). And the formula is as follows:

The design ratio N is a/D, and is preferably 74% to 92% in general.

for example, 74%, the tool length D is 530, and the tool center distance a is 390; the cutting width F is equal to D + A, equal to 530+390, equal to 920, a little less, and hopefully a big point better; it is sufficient that the recut width B-a-140.

As another example, the design ratio N is 92% a/D, the tool length D is 530, and the tool center distance a is 490; the cutting width F of the mower is D + A, 530+ 490-1020, which is a little bit good; a repeating swath B-D-a-40 may also be used. Can be further designed according to the method.

When the heavy mowing width B is not more than D-A and not more than 20, grass may be leaked, and the grass may be left and right swayed and fallen down by the mowing disc, so that the grass may be occasionally not mowed.

The PROE-WILDFIRE software can be used for conveniently variable drawing, and other software can be used.

Briefly describing a noise reduction groove (47) close to the front above a frame and a wedge (29) with noise reduction, wherein the noise reduction groove (47) and the wedge (29) are arranged above the frame, and as shown in figure 1, an engine is omitted for the sake of clarity and prevention of blocking; the silencing groove comprises a silencing pipe and a water groove; the lower bent pipe of the silencing pipe is immersed in a water tank (42) beside the silencer so as to have a cooling effect. The water tank has the function of killing two birds with one stone, and water is used for replacing a heavy object besides cooling; it is arranged at the front part of the mower, so that the mower has the function of counterweight. The water in the water tank is added only when the water tank is used temporarily, and the transportation weight is not counted; half of the water is added instead of filling the tank. The lower end of the lower bent pipe of the silencing pipe is connected with the outlet of the silencer. The water tank is characterized in that the side surface of the water tank is provided with a through hole so as to be matched with the lower bent pipe of the silencing pipe; the bottom of the water tank is provided with a water outlet. The muffling tube consists of a plurality of sections of inner tubes, connecting pieces and an outer tube containing a plurality of wedge (29) arrays of micropores. The inner pipe is characterized in that honeycomb hexagonal holes, or polygonal holes, or elliptical and oblong holes are arranged on the inner pipe; the lengths of the inner pipes in the multiple sections are different and alternate; for example, if there is a longer inner tube that is three quarters of a wavelength multiplied by a factor, then the next inner tube is one quarter of the wavelength multiplied by a factor. In addition, the distribution of a plurality of holes arranged on the inner pipe is not uniform but sparse and dense; the part of the middle quarter of the tube length on one section of the tube with the three-quarter wavelength multiplication coefficient is provided with dense holes, and the rest part of the tube is provided with sparse holes; and the holes are characterized by hexagonal holes or polygonal holes; the inner tube with the quarter-wavelength multiplication coefficient is also characterized in that the distribution of a plurality of holes arranged on the inner tube is not uniform but sparse and dense; and the part of the middle part of the pipe with the length of three eighths of the pipe on the section of pipe is provided with dense holes, and the other parts of the pipe are provided with sparse holes. Said holes are polygonal, preferably hexagonal; or the eyelet is characterized by being polygonal, hexagonal or polygonal with a flanging in a point-to-point shape; or the holes are characterized by micro-porous wedges (29) with a quarter-wave effect and a dilatational wave effect and a honeycomb effect. The surface of the outer pipe is provided with a plurality of protrusions formed by punching, and the protrusions are in a multi-pyramid shape, namely a polyhedral pyramid shape, particularly a hexagonal pyramid shape and are called wedges (29); the wedge is characterized in that the root of the metal plate which is punched is hexagonal, the width of the wedge is reduced from the root to the top, and the width-depth ratio of the wedge is approximately one to one or one to one and one to five. And the top of each of the six-pyramid shaped wedges on the surface of the muffler pipe is provided with a micro-hole (30) with a diameter of 0.1 to 0.5 mm approximately. On the surface of the inner tube, as an improvement, or the hole may be changed to have a plurality of protrusions formed by punching, and the surface is in a polygonal cone shape, especially a hexagonal cone shape, and may be also called a wedge, but the width-depth ratio is one to eight or at most four to one. The wedges form a wedge multi-edge structure, and the arrangement of the wedges on each surface is honeycomb-shaped hexagonal polygon or random. Metal fibers or temperature-resistant non-metallic materials can be filled in the silencing pipe or can be filled in the silencing pipe; or may be half filled with sound absorbing materials resistant to medium temperatures such as porous sound absorbing materials or flexible materials and film-like materials. Such as fibres, foams, granules, alone or in more or less mixed applications. Also usable are fibers such as rock wool, or glass wool, especially ultra-fine glass wool; or to be fire-resistant with foams; or filling or attaching with particles such as expanded perlite, porous cement brick, and temperature-resistant fabric, felt; so as to further improve the performance index, and the comprehensive composition can achieve the purpose of better noise reduction effect. The materials have complementary high and low frequency sound absorption capabilities. The wedges increase the heat dissipation area; in particular, many wedges with pores have not only a pore effect of noise reduction but also a potential effect of draining excessive liquid. As the extension, the wedges can also be reversely stretched, namely outward to increase the heat dissipation area. A gasket serving as both a heat insulating pad and a shock absorbing pad may be further assembled between the muffler and the engine. A gasket which is used as a heat insulation pad and a shock absorption pad can also be arranged between the outlet of the silencer and the silencing pipe. The silencing groove provided by the invention is provided with a plurality of wedge areas with large areas, contains a plurality of wedges with micropores, and has wedge resistance reduction effect and micropore effect. The silencing groove provided by the invention has the beneficial effects that: increase the silencing effect and improve the comprehensive performance of the silencer, such as insertion loss, sound transmission loss, noise reduction and attenuation, and cooling. One inventive concept is to wander like ghost: if thick and soft foam plastics are used or improved, the various noise-elimination and vibration-reduction materials are comprehensively utilized, and a plurality of large-area wedge areas are used and are arranged on a mowing platform (58), see fig. 23, and a plurality of places of the mower, such as a head cover, a vehicle body, a vehicle seat with noise reduction in the middle part above the vehicle frame and a grass collecting box with noise reduction in the rear of the vehicle, the effects of security protection and noise reduction can be expected. In addition, the present accessory is equipped with earplugs, sound-proof cotton, earmuffs and sound-proof helmets for personal protection of the seated operator. And artificial foot protection plates with rotating hinges are arranged on two sides of the middle part of the mower. The artificial foot protection plate with the rotating hinges arranged on the two sides of the middle part of the mower consists of a protection plate and the rotating hinges; the protective plate is characterized in that the protective plate is made of sound-absorbing materials and is arranged on the left side and the right side respectively. The artificial foot protection plate is firstly arranged on the pushing and riding dual-purpose mower shown in fig. 3 and is temporarily used as an extension; however, when the side grass discharge plate is sometimes arranged on the right side, the foot protection plate is only arranged on the left side; the protective plate can be arranged on the cutting disc, the shape is preferably foot-shaped, namely, the protective plate is provided with a wave shape with two slightly larger ends, so as to enhance the attention association and artistic image of the foot; the protective plate is preferably made of a relatively soft but not too soft material with a Shore hardness of 65 to 95 such as rubber, polyurethane or polyvinyl chloride, and has the advantages that the flexible plate is less prone to grass damage when placed horizontally for work, for example, on both sides of the cutting disc (58), and the rubber plate is more convenient to pack. The protective plate can also be made of hard materials. The protection plate edge be equipped with mobilizable hinge, do not limit one or many or with flexible material, assist again with the definite spacing that can just end, as long as enable the protection plate let go can work and turn up and go to be convenient for vanning just can. As extension or improvement, the protection plate can also be detachable and can be put on when in work and taken off when not in work. In order to prevent the trouble, the prevention is mainly carried out, and the complete machine for delivering goods in large quantity can be ensured to pass through the prosthetic foot detection. The fender can also be used elsewhere in the fuselage, for example above the two rear wheels. As another example, the entire car may be made of sound insulating material to be not open, but roofed, or fully enclosed, to facilitate sun protection, or to provide sound insulation. The beneficial effects of various noise reduction measures are as follows: not only utilizes different characteristic impedances of sound absorption materials to reduce reflected sound, but also utilizes the principle of small hole low-frequency diffraction shadow area to arrange a sound barrier to weaken high-frequency noise. The number of the earplug pre-mode earplugs is more, and the earplugs are molded into a certain geometric shape by soft plastics or soft rubber; or with a foam earplug; for sound insulation and comfort. The sound-proof cotton is made of superfine glass wool through chemical softening treatment, and the diameter of the sound-proof cotton is preferably 1-3 microns; and is made into a small cone shape so as to be plugged into the ear; the sound insulation effect of the sound-proof cotton is better than that of common cotton, the sound insulation value is improved along with the increase of noise frequency, the sound-proof cotton is more effective for isolating high-frequency noise, and the use of the sound-proof cotton not only has no obstruction to language connection, but also improves the definition of the language. The earmuffs are ear protection devices like earphones or music earmuffs, so that the pleasure of work is increased. The sound-proof helmet is a motorcycle helmet and has a security function.

the saddle that has the noise reduction of frame top middle part partially back also have the characteristic: the saddle is wrapped with thick noise reduction foam materials, and the saddle can move back and forth; the saddle is provided with a limit protection switch which is connected when a person sits down and is not connected when the person leaves; or a non-contact human body sensor, namely a sensor, also has a protection effect. The grass collecting box (50) with noise reduction is arranged at the rear of the vehicle, 2 hooks are arranged, and the grass collecting box is characterized by being S-shaped and convenient to hang on 2 hangers arranged behind the vehicle frame and provided with pins, and the pins are movably clamped in the S-shaped, so that the grass can be poured and taken out easily by manually rotating the angle.

The single-sided synchronous belt which drives the two cutters in the same direction is too tight in a workshop and is not easy to install on a production line, and if the single-sided synchronous belt is loose, the single-sided synchronous belt is easy to jump and is asynchronous occasionally. As an improvement, in order to make the single-sided synchronous belt (63) which drives the two knives in the same direction be installed well, a tension wheel is additionally arranged; the tension wheel is in toothless surface contact with the single-sided synchronous belt (63), so that the tension wheel is a toothless circular wheel; the tensioning wheel is arranged on the tensioning bracket, and the tensioning bracket is movably adjusted by taking the fixed bolt as a lever fulcrum; the device is presumed by an adjusting bolt and an adjusting nut on a fixed small adjusting frame, so that the device is convenient to mount and eliminates the asynchronous phenomenon.

As an improvement, the whole car is made of sound insulation materials, is not open, but is topped, or is a fully-closed car type, or is made into a large-scale whole car, and the sound insulation and sun blocking of the whole car can be facilitated; or several large pieces. The machine head body can be arranged at any position or integrally. The cowl (41) and the vehicle body (50c) shown in fig. 22 may be either integrated or joined. For example, the body (50c) can be divided into a front block and a rear block, and the rear block can be inserted and combined to be used as an upper big cover of the grass collecting box. The machine head body is of a noise-proof structure such as a machine head body and a header which are molded and stretched by steel plates into honeycomb wedge convex-concave shapes, or a large honeycomb wedge convex-concave shape which is attached to an iron plate and formed by injection molding, and is matched with sound insulation materials such as foaming materials, porous sound absorption materials, foaming cement or foaming plastics, or flexible materials and film materials; either attached or directly molded. Or adding an azo foaming agent into the mould to form a structure which is solidified by foaming in the inner part and the outer part, such as a portable refrigerator; or double-layer blow molding to form large-area honeycomb and wedge-shaped convex-concave various large blow molding parts, such as a machine head and a machine body, and then attaching thick foamed plastic. The various silencing and damping materials are comprehensively utilized and a plurality of large-area wedge areas are arranged on a mowing platform (58), a vehicle head cover (41), a vehicle body (50c), a vehicle seat with noise reduction, a grass collecting box with noise reduction, or a large-scale integral vehicle body, or a large-scale part such as a portable refrigerator structure which is solidified by adding an azo foaming agent in a mould; or double-layer blow molding to form large-area honeycomb and wedge-shaped convex-concave various large blow molding parts, or attaching thick foamed plastics. In summary, there are various noise reduction measures: not only utilizes different characteristic impedances of sound absorption materials to reduce reflected sound, but also utilizes the principle of small hole low-frequency diffraction shadow area to arrange a sound barrier to weaken high-frequency noise. Two vehicle lamps (43) are arranged at the joint of a noise-reducing hood (41) and a noise-eliminating air filter screen (44), so that attention needs to be paid to both adhesion and noise leakage, and attention needs to be paid to temperature rise; if the lamp is an LCD luminous tube, the temperature rise is not a problem; the noise-eliminating air filter screen (44) is preferably made of foaming materials of an air filter and is fixed with a grid net, and the noise is reduced through air filtering.

science and improvement are continuously perfected and endless. When in actual mowing, the knife is sometimes damaged by stones; also as specified by the blade test, the steel tube extended into the blade cutting zone, was not allowed to break, but was bendable, which motivated us to make an improved self-clutched blade mower, and a guarded cutter. The multiple cutters are changed, and then a plurality of parts related to the self-clutching of the cutters are changed. The purpose is in order to overcome lawn mower prior art's conventional grass cutting device used part is more, and inertia is great, consumes power more, and the sword is rigid connection, does not have the shortcoming of safety protection. The improved cutting mechanism of the lawn mower is provided, is a knife without an independent knife holder for the lawn mower, is called as a grass cutting knife without a knife holder for the lawn mower, can reduce parts and cost; secondly, the weight is reduced, and the power consumption is reduced; thirdly, the device has the function of safety protection. However, there are several types of already formed mower blade holders and accessories that are desired to be easily modified for use, and therefore, the use of several clutch pin type blade holders, and in turn, several modified end face friction blade holders, are described below; and the selection of the function wave knife clutch on the riding machine is described.

FIG. 10 is a schematic view of a conventional blade holder assembly of a lawn mower; the improved cutter holder assembly with the clutch pin of the self-clutch blade mower mainly comprises a blade (60), a cutter holder (60a), a power pulley (60d), a cutter clutch pin (60c) and an elastic ring (60e), wherein the blade (60) is arranged on the cutter holder (60a), and the cutter holder (60a) and the power pulley (60d) are arranged on an engine spindle with a pin slot, and is characterized in that: the tool apron (60a) is provided with a pin hole for placing a tool clutch pin, see fig. 29; placing the knife clutch pin (60c), see fig. 11; an elastic ring (60e) is externally arranged, see fig. 15; the head of the knife clutch pin (60c) is provided with an inclined plane, or 2 inclined planes, or an arc surface or an involute surface, referring to fig. 11 and 14, so that when the torque is too large, the radial component force on the inclined plane exceeds the specified 68Nm to make the inclined plane move back and forth; the tail part of the knife clutch pin (60c) is provided with a concave surface so as to be convenient for installing an elastic ring; the elastic ring (60e) is an annular tight ring spring; of course, the elastic ring can also be a rubber ring; or the tail part of the clutch pin is provided with a pressure spring or a torsion spring. Because the push riding dual-purpose mower and the grass pressing mower are seen in fig. 14, a tool apron (60a2) and a power pulley are integrally cast aluminum and are arranged on an engine spindle with a pin groove, a pin hole is formed between the pulley and the tool apron, a tool clutch pin (60c) is arranged, the elastic ring is arranged, and the elastic ring can be directly arranged by a rubber ring; the annular close-coil spring is either complete or hooked by a straight long close-coil spring; the diameter of the wire and the diameter of the ring are combined, and the fact that the force is large when the diameter of the wire is large and the diameter of the ring is small is noticed, the influence on the material and the heat treatment is caused, after primary selection, the test is carried out again, and the production is determined. The elastic ring is a rubber ring, and is solid, and the section of the elastic ring is circular; or hollow, with a cross-section in the shape of a circular tube; if the tail part of the clutch pin is provided with a pressure spring or a torsion spring, the tail part of the clutch pin is preferably drilled with an axial hole with the depth being half of the total length of the pin so as to be convenient for inserting a steel wire of the pressure spring or the torsion spring. The wire diameter of the elastic ring is preferably round; of course, a flat band spring may be used.

the self-clutching blade is used for cutting grass actually, and can be opened without damaging the blade when meeting stones, and for passing a specified blade test, namely, a steel pipe is stretched into a cutting area of the blade, is not allowed to be broken, but can be bent, so that the improved self-clutching blade mower and various protected cutters are made. Firstly, a plurality of cutters are changed, and then a plurality of parts related to cutter self-clutching are changed; the purpose is to overcome the defects that the conventional mowing device in the prior art of the lawn mower has more parts, larger rotational inertia and more consumed power, and the cutter is rigidly connected and has no safety protection; the improved cutting mechanism for lawn mower has several deformed friction end plates and several friction plates. The key point is that the improved function wave friction plates with end surface friction can be used for clutching the cutters of various cutter holders and the power pulley of the riding mower, so that the problem that the riding double cutters are not well synchronized and clutched is solved.

Referring to fig. 18, a front view of an end clutch base with a knife for several lawn mowers; and fig. 19, there is assembly cross-sectional view of end clutch blade holder for mower of sword separation and reunion, there is blade self-clutching blade holder assembly equipped with end clutch for mower of sword, mainly by end clutch blade holder (60a3), blade holder lower pressure piece (60b3), clutch plate (60k) under the blade holder, clutch plate (60m) on the blade holder, and sword (60h) and blade holder inner cushion, and power shaft and sword fastening bolt that do not draw constitute, characterized by: the tool apron with the end clutch is internally provided with a tool apron inner cushion block and then is arranged on a power shaft, and an end clutch tool apron (60a3), a clutch plate (60m) on the tool apron, a knife (60h) or other knives, a tool apron lower clutch plate (60k), a tool apron lower pressing plate (60b3) and a knife fastening bolt are sequentially arranged from top to bottom; referring to fig. 41, the end surface of the tool apron (60a3) with end clutch is provided with a groove which is matched with a convex block arranged on a tool apron lower pressing sheet (6063), when the convex block is matched with the tool apron lower pressing sheet, the root of the convex block is larger, no matter how the tool holder is clamped in the middle and is clamped again, a gap is always reserved between the large plane of the tool apron with end clutch and the large plane of the tool apron lower pressing sheet; or the end surface of the tool apron is provided with counter bores (60z) to replace grooves, and the pressing sheet under the tool apron is provided with limit nails (60q) to replace bumps, more than two pairs are needed, as long as the effective length of the limit nails is larger than the depth of the counter bores, a gap is formed, or nails are repaired or pads are added to ensure that the gap is proper. Then, a proper clutch plate (60m) on the cutter holder and a proper clutch plate (60k) under the cutter holder are arranged at the gap, when the self-clutch type self. In order to compensate for possible manufacturing and assembly tolerances, the material of the upper clutch plate and the lower clutch plate of the tool holder is selected to be soft, not from steel, but from plastic, preferably from PP, polypropylene or PU, polyurethane, although other soft materials, such as fabric, can be used; the upper clutch plate and the lower clutch plate of the tool apron are subjected to various deformation improvements, so that the assembling friction resistance suitable for self-clutching is facilitated; for example, referring to fig. 20 and 21, the end clutch tool apron for the mower with the blade clutch has a multi-tooth tool apron lower clutch plate (60k), at least 2 teeth, at most 100 teeth, and multiple teeth are arranged uniformly in a circumference or in parallel to form a convex-concave shape; each tooth of the multiple teeth is preferably in a sawtooth shape, namely, each tooth is preferably a protruding block with a right angle at the left side and an obtuse angle at the right side so as to adapt to the characteristic of unidirectional rotation of the mowing knife; for another example, referring to fig. 22, the multi-tooth upper clutch plate (60M1) of the end clutch seat for mower with knife clutch has multi-tooth characteristics similar to the multi-tooth lower clutch plate (60k), and also has at least 2 teeth and at most 100 teeth, and the multi-teeth are arranged uniformly in circumference or in parallel to form a convex-concave shape; each tooth of the multiple teeth is preferably in a sawtooth shape, namely, each tooth is preferably a protruding block with a right angle at the left side and an obtuse angle at the right side so as to adapt to the characteristic of unidirectional rotation of the mowing knife; but in addition, the multi-tooth is not only a single surface, but also double surfaces; this or both sides also apply to the upper clutch plate described below and all the upper clutch plates. For example, as an improvement, refer to fig. 23, which is a schematic view of a blade holder clutch plate (60m2) with multiple convexo-concave of an end clutch blade holder for a mower with blade clutch, which has a large end and a small end, or has multiple convexo-concave with different depths, and the convexo-concave is either round or square, and also has different depths; further, as a modification, referring to fig. 24, it is a blade holder clutch plate (60m3) having a plurality of waves for an end clutch blade holder for a lawnmower having a blade clutch. As for the knife, like knife (60h), see fig. 18, it is a knife that is special for the customer; for the self-clutching of the knife, a plurality of sections of flail knives can be used, each side is at least 3 sections, each section is movably riveted or screwed, a first section of the flail knife connecting seat can be provided with a concave arc, and a gap is reserved; flail knife or with a chain with edges; or using nylon rope and steel wire rope as knife, and preferably using profiled nylon thread with edge. As an improvement, the clutch plate on the cutter holder is also designed with a plurality of types of function wave clutch plates for various lawns and grass pressing mowers.

the end clutch tool post for the mower with the blade clutch having the tool upper clutch plate and the tool lower clutch plate is originally also used for a riding mower, namely a riding mower, but because the two blades of the riding mower need to be synchronized, only one blade can not be automatically clutched, and if one blade is disengaged and the other blade is engaged, the two blades can be put on the shelf. How should this problem be solved for a blade self-clutching riding mower? The main shaft of the engine is provided with two belt wheels, namely a belt (62) for driving a rear axle and a belt (66b) for driving a cutter, and the power of the main shaft (51) of the engine is transmitted to the first cutter seat assembly through the belt (61b) and then transmitted to the second cutter through the synchronous belt (63), so that the double cutters can move and stop as long as the power belt wheel (61c) of the first cutter seat assembly can be automatically clutched. The first cutter seat assembly is shown in the position of the whole vehicle in figure 4. The first cutter holder assembly of the riding mower is mainly composed of a knife (60), a cutter holder (14), a knife support (68), a synchronous pulley (63d), a first knife shaft (69), a power pulley (61c), a clutch plate (60m) without wave or with function wave, a pressure plate (61d), a large pressure pad (16) and a fastening bolt (17), as shown in an explosion diagram of the first cutter holder assembly with the function wave clutch plate in figure 9, and is characterized in that: the cutter support (68) is fixed on the cutting disc, the first cutter shaft (69) is installed in the cutter support through a bearing, the cutter (60) and the cutter holder (14) are installed at the cutter end of the first cutter shaft (69), the synchronous belt pulley (63d), the power belt pulley (61c), a clutch plate (60m) without waves or with function waves, a pressure plate (61d), a large pressure gasket (16) and a fastening bolt (17) are sequentially installed at the power end of the first cutter shaft (69), the synchronous belt pulley is fixedly installed on a shaft through a key, the rest of the synchronous belt pulley is sleeved on the shaft through friction, and function wave clutch plates can be arranged on two sides of the power belt pulley (61c), and the clutch plates with function waves are generally suggested to be used, so that the clutch effect is more reliable. When the power belt wheel (61c) is overloaded, the clutch is realized by the slipping of the function wave clutch plate; the power pulley (61c) can also be made into a clutch pin type for clutch as shown in fig. 12, namely, a side pin hole is arranged on a pressure plate (61d), the knife clutch pin (60c) is put in, and the elastic ring is externally sheathed; as an improvement, or as a combination, namely a combination of a clutch pin type and an end face clutch with a function wave clutch plate. The selection of which clutch is dependent on the model. The clutch plate (60m) without wave or with function wave is universal, and the selected clutch plate is determined according to various types of machines. As an improvement, a clutch plate (60m7) with a plurality of round pits is additionally arranged, as shown in figure 25, and the clutch plate is characterized in that a plurality of round pits are arranged, and the inner part of each pit is preferably of a concave spherical shape; as shown in FIG. 27, the clutch plate (60m8) with multiple triangular pits is characterized in that multiple triangular pits are provided, and the inside of each pit is preferably concave; as also shown in FIG. 28, a clutch plate (60m9) having a plurality of arrow-head pits is characterized by a plurality of arrow-head pits, and preferably also has a hollow shape; as shown in FIG. 29, the clutch plate (60m10) has a plurality of polygonal pits, and is characterized in that the pits are polygonal and preferably concave; to facilitate accumulation of the suspended hot air cushion effect.

for improvement, see fig. 13, which is a clutch plate (60m6) with a function wave, the equation is:

SD ═ SIN (TRAJPAR × 360 × 12), the trace is circular, and the wave number is 12.

as a further improvement, see fig. 30, which is a clutch plate (60m5) with a function wave, the equation is:

SD ═ SIN (TRAJPAR × 360 × 30), the trace is circular, and the wave number is 30.

As a similar improvement, the clutch plate (60m) with function wave has the following equation:

SD-D < SIN (TRAJPAR 360B), wave number B, amplitude D, which can be selected as required, for example, 0.1-100.

Referring again to fig. 31, again as a modification, this is a clutch plate (60m11) with a function wave, whose equation is:

SD TRAJPAR 360 12, the trace is circular, the wave number is 12, and the scan cross-section is flat.

Again, as a refinement, see fig. 32, which is a clutch plate (60m12) with a function wave, the equation is:

SD TRAJPAR 360B, the trajectory is circular, the wave number is B, the scanning cross section is polygonal, and at least three sides.

Referring again to fig. 33, again for improvement, this is a clutch plate (60m13) with a function wave, whose equation is:

SD TRAJPAR 360B, the trajectory is circular, the wave number B, the scanning cross-section is circular, this may not be an elastic ring, but plastic, such as plastic or rubber.

The clutch plate with function wave has similar characteristics and is pressed to deform and bounce although the shape is multiple, and the clutch plate has the beneficial effect of being capable of realizing multipoint clutch.

The riding mower originally only has one rear large grass collecting box which is too heavy and inconvenient to take down, so that two left and right double grass boxes are changed, but the problem comes, the grass in the left and right double grass boxes is always more on one side and less on the other side; after a plurality of schemes are tried, the problem is solved that how to uniformly load grass in the left and right grass boxes to obtain a riding machine with self-adjusting left and right grass boxes for balancing; the method is finally conceived. It is also a difficult problem how to feed the grass from the chassis to the tall double grass box.

the technical scheme adopted by the invention for solving the technical problems is as follows:

The riding machine is used for mowing lawns in garden operation, a grass collecting box frame (50) is arranged at the rear part of a vehicle body (50c), and a grass collecting large pipe (10) is arranged on the vehicle body so as to send mows from a mowing disc to the upper part of the grass collecting box frame (50); a box cover is also arranged above the grass collecting box frame (50); the grass collecting box frame is characterized in that a longitudinal pipe is arranged at the rear part of the vehicle body (50c) along the central axis of the vehicle body and serves as a balance rotating shaft, a balance rotating base (7) is arranged in the middle of the grass collecting box frame (50) and is matched with the balance rotating shaft, frames are arranged on the left side and the right side of the grass collecting box frame (50) so as to be placed in a left grass box (5) and a right grass box (6), a left grass scale plate (8) and a right grass scale plate (9) are arranged on the balance rotating base (7) arranged in the middle of the grass collecting box frame (50), the left grass scale plate (8) and the right grass scale plate (9) are acute angles, the left grass scale plate (8) and the right grass scale plate (9) are symmetrical relative to the balance rotating base (7), and the left grass scale plate (8) and the right grass scale plate (9) form a door plate of a valve of a flow distribution cone; when in balance, the acute angle between the left grass scale plate (8) and the right grass scale plate (9) is just under the grass outlet at the upper end of the grass collecting large pipe (10); when grass is discharged, the cut grass is sent to the upper part of the grass collecting box frame (50) from the cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10), and enters the left grass box (5) and the right grass box (6) under the influence of door plates of flow distribution cones of the left grass scale plate (8) and the right grass scale plate (9); when the grass is not balanced and the right grass box (6) has more grass and is inclined downwards, the grass is sent to the upper part of the grass collecting box frame (50) from the cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10) with reference to fig. 37, and the grass enters the left grass box (5) for adding more points under the influence that the acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are inclined towards the right through the guide of the left grass scale plate (8); when the grass is divided and unbalanced, the left grass box (5) has more grass and is inclined downwards, the grass is sent to the upper part of the grass collecting box frame (50) from the grass cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10) referring to fig. 38, and the grass enters the right grass box (6) for adding more points under the influence that the acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are deviated to the left and are guided by the right grass scale plate (9); the balance of the left grass box and the right grass box is automatically adjusted in cycles; in order to prevent the grass collecting large pipe (10) from sending grass from the cutting disc to the high double grass boxes and sometimes causing the phenomenon of unsmooth grass leakage under the chassis, a flexible suspension screw feeder (10a) is arranged in the grass collecting large pipe (10), and is a flexible elastic spiral corrugated spring steel wire which is driven by a motor (10c) which is arranged above a mouth of the grass collecting large pipe and is provided with a planetary reducer on the box cover, so as to send the grass to be cut from the cutting disc to the upper part of the grass collecting box frame (50); the engine for the riding machine comprises silica gel shock pads (54a), small tubes of a function silencing tube (54d), an auxiliary silencing tube (54g), fish scale wedges (54e) and a variable cross-section air pipe (54 f); the exhaust port of the engine cylinder is connected with the catalyst muffler pipe (69), and noise is reduced through the functional muffler pipe (54d), the small pipe of the auxiliary muffler pipe (54g), the fish scale wedge (54e) and the variable cross-section air pipe (54 f); the silica gel shock absorption pad (54a) is arranged at the air outlet direction side of the catalyst-containing muffling pipe (69) connected with the exhaust port of the cylinder body (g44), and the cross-section-variable air pipe (54f) is connected in series; the function silencing pipe (54d) is arranged in the variable cross-section air pipe (54 f); said functional muffler tubes (54d) are spaced apart in series and are axial along a decreasing amplitude curve that approximates the decreasing amplitude of an odd function of a plurality of finite sine wave trains having a period similar to a third octave; the length and the pipe diameter of each silencing pipe combined by the plurality of function silencing pipes (54d) for multi-stage silencing are changed, and the length of each silencing pipe is shortened in a penetrating way and the pipe diameter is gradually reduced when the silencing pipes are seen from front to back, namely in the air outlet direction; the function muffling pipes (54d) are combined into a plurality of fish scale wedges (54e) and wedges (50d) with through holes, wherein each muffling pipe for multi-stage muffling is provided with the fish scale wedges (54 e); the fish scale wedges (54e) are provided with arc-shaped small narrow openings and wedges (50d) with through holes; the function muffler pipe (54d) is also provided with an auxiliary muffler pipe (54g) of an auxiliary side branch; the auxiliary silencing pipe (54g) is a small pipe, and a wedge (50d) with a through hole is arranged on the small pipe; the variable cross-section air pipe (54f) is variable in cross section, and at least three parts of the variable cross-section air pipe are expanded and three parts of the variable cross-section air pipe are reduced; the variable cross-section air pipe (54f) is bent, and at least three parts of the variable cross-section air pipe are provided with bends; the outlet air enters a first function muffling pipe (54d) arranged in the variable cross-section air pipe (54f), and a plurality of small arc narrow openings and wedges (50d) with through holes arranged on the fish scale wedges (54e) arranged on the muffling pipe are compressed and then expanded to complete a first-stage muffling process, and small pipes of auxiliary subsidiary muffling pipes (54g) arranged on the function muffling pipe (54d) provide a plurality of paths for the air flow without being mixed from a main pipe so as to further improve the muffling effect; the variable cross-section air pipe (54f) is variable cross-section, and the airflow flows from the expansion part to the reduction part to assist the compression and expansion; the variable cross-section air pipe (54f) is bent and has a turning function, so that the auxiliary effect of preventing main noise from being directly transmitted is achieved; the airflow coming out of the first function silencing pipe (54d) after the first-stage silencing process is expanded in the enlarged cavity of the variable cross-section air pipe (54f), passes through a curve, then enters the second function silencing pipe (54d) with the variable length and pipe diameter, and is compressed and expanded again through the auxiliary silencing pipe (54g), the small arc-shaped narrow opening of the fish scale wedge (54e) and the wedge (50d) with the through hole to complete the second-stage silencing process with the noise frequency change; the air flow coming out of the second function silencing pipe (54d) after the second-stage silencing process is finished expands in the enlarged cavity of the variable cross-section air pipe (54f), passes through a curve, then enters a third function silencing pipe (54d) with the variable length and pipe diameter, passes through the auxiliary silencing pipe (54g), the small arc-shaped narrow opening of the fish scale wedge (54e) and the compression expansion of the wedge (50d) with the through hole to finish the third-stage silencing process, blows out noise reduction from the reduced air opening, and then is indirectly discharged away from the population through the knife-like hole (28a) of the aluminum pipe with more than one meter; at the entrance of the piston pin end of the engine piston, the common chamfer (d18) of the pin hole is not needed, the chamfer (d18) of the pin hole on the drawing of the engine piston is removed, a hole is formed without the chamfer, and two G-shaped elastic pads are directly installed.

drawings

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

fig. 1 is a schematic bottom view of a function wave blade self-clutched ride-on mower with the housing removed.

Fig. 2 is a schematic diagram of a function wave blade self-clutched ride-on mower.

Fig. 3 is a schematic oblique bottom view of the dual-purpose grass pressing mower for hand-push riding.

FIG. 4 is a schematic view of a function wave blade self-clutched riding lawn mower with the housing removed and exposing a first blade mount assembly.

fig. 5 is a schematic view of a mowing device.

Fig. 6 is a perspective view of a blade without a holder with a key (1) for self-disengaging.

fig. 7 is an enlarged partial cross-sectional view of a blade without a holder having a key (1) for self-disengaging.

FIG. 8 is a partial front view of a multi-tooth grass cutting blade having a self-sharpening blade with a self-clutching key (1).

Fig. 9 is an exploded view of a first blade mount assembly of a function wave blade self-clutched ride-on mower.

fig. 10 is a schematic view of a clutch pin type self-clutching tool holder assembly with a tool clutch pin (60 c).

Fig. 11 is a front view of a clutch pin type self-clutching tool holder (60a) with a tool clutch pin (60c) attached.

Fig. 12 is a schematic view of a power pulley (61c) with a disk (61d) for a clutch pin type self-clutching device that may be mounted to a first seat of a riding mower.

fig. 13 is a schematic diagram of a function wave clutch plate (60m6) for a function wave blade self-clutched ride-on mower.

Fig. 14 is a schematic view of a clutch pin type wheeled holder (60a2) with a pull-out clutch pin (60c) for a push-and-ride dual-purpose lawnmower.

Fig. 15 is a schematic view of the elastic ring (60e) for the knife clutch pin.

FIG. 16 is a schematic view of an end-clutched tool holder (60a 3).

Fig. 17 is a schematic view of a tool holder lower press plate (60b3) with end-clutching.

FIG. 18 is an elevation view of a mounted end clutch tool holder.

FIG. 19 is an assembled cross-sectional view of a tool holder with end clutches.

Fig. 20 is a schematic view of a multi-tooth holder lower clutch plate (60k) for an end clutch holder.

Fig. 21 is a schematic view of another angle of the lower clutch plate (60k) of the holder with multiple teeth.

FIG. 22 is a schematic view of a clutch plate (60m1) having multiple teeth.

fig. 23 is a schematic view of a clutch plate (60m2) with multiple projections and depressions.

Fig. 24 is a schematic view of a clutch plate (60m3) with multiple undulations.

FIG. 25 is a clutch plate (60m7) with multiple circular pockets.

Fig. 26 shows a power pulley (61 c).

FIG. 27 shows a clutch plate (60m8) with multiple triangular pockets.

FIG. 28 is a clutch plate (60m9) with multiple arrow pits.

FIG. 29 shows a clutch plate (60m9) having a plurality of polygonal recesses.

FIG. 30 is a clutch plate (60m5) with a function wave.

FIG. 31 is a clutch plate (60m11) with a function wave.

FIG. 32 is a clutch plate (60m12) with a function wave.

FIG. 33 is a clutch plate (60m13) with a function wave.

fig. 34 is a schematic view of a ride with self-adjusting left and right double-box balancing.

FIG. 35 is a schematic view of the grass collecting main pipe (10), the left grass box (5) and the right grass box (6).

FIG. 36 is a schematic view of a balance swivel (7) with left (8) and right (9) scale plates.

FIG. 37 is a schematic view showing the top of the right grass on the balance base 7, which has the left grass scale 8 and the right grass scale 9.

FIG. 38 is a schematic view showing the left grass on the balance base (7) having the left grass scale (8) and the right grass scale (9).

FIG. 39 is a schematic view of the grass collecting large pipe (10) and the auger (10a) feeding grass and the left grass box (5) and the right grass box (6).

FIG. 40 is a schematic view of the grass collecting pipe (10) with the screw (10a) and the motor (10c) feeding grass.

FIG. 41 is a schematic diagram of the engine and the functional muffler pipe (54d) and the variable cross-section air pipe (54 f).

Fig. 42 is a schematic view of a fish scale wedge (54 e).

FIG. 43 is a schematic view of a functional muffler pipe (54d) and a variable cross-section air pipe (54 f).

As shown, in the figure:

1. Is a bond (1); 2. is a pit (2); 3. is a key slot (3); 4. an air filter screen;

5. a left grass box (5); 6. a right grass box (6); 7. a scale swivel (7); 8. a left grass scale plate (8);

9. A right grass scale plate (9); 10. a grass collecting large pipe (10); an auger (10 a); 10c. a motor (10 c);

11. A drive pulley; 12. a cushion cover; 13. a key; 14. a tool apron;

16. A large pressure washer 16; 17. a fastening bolt 17; 18. is a through hole (18); 20. cutting edges;

24. Is a lateral multidentate (24);

25. Is a top tooth (25);

26. Is end multidentate (26);

27. is a wing edge (27);

29. Is a wedge (29);

41. is a head cover (41); 42. is a water tank (42); 43. is a vehicle lamp (43);

44. is a sound-deadening airstrainer (44); 45. is a double bumper (45);

46. Are two front wheels (46); 46b. are two rear wheels (46 b);

47. is a muffler pipe (47);

48. Is a steering wheel (48);

49. Is a seat (49);

50. is a grass collecting box frame;

50c. is a vehicle body (50 c);

51. Is an engine main shaft and a belt pulley (51);

58. Is a cutting disc (58); 60. is a mowing knife (60);

61b is an engine-to-knife drive belt (61 b);

62. A belt (62) which is a pulley on the rotating shaft of the first plunger pump of the engine to the rear axle;

63. is a single-sided synchronous belt (63) for driving the two knives;

61c, a knife driving pulley (61c) with a pin hole for knife clutch;

60c. is a knife clutch pin (60 c);

60a, a clutch pin type self-clutch tool holder (60a) provided with a tool clutch pin (60 c);

a platen (61d) that is a power pulley (61 c);

60m6. is a function wave clutch plate (60m6) for a function wave blade self-clutched ride-on mower;

60a2. is a wheeled seat (60a2) with a clutch pin (60 c);

60e, an elastic ring (60e) for the knife clutch pin;

60a3. is an end-clutched tool holder (60a 3);

60b3. is a lower pressing plate (60b3) of the tool apron with end clutch;

60k, a cutter seat lower clutch plate (60k) with multiple teeth for an end clutch cutter seat;

60m1. is a clutch plate (60m1) with multiple teeth;

60m2, a clutch plate (60m2) with multiple convex-concave parts;

60m3, a clutch plate (60m3) with multiple wave folds;

60m7. is a clutch plate (60m7) with multiple round pits;

61c. is a power pulley (61 c);

60m8. is a clutch plate (60m8) with multiple triangular pits;

60m9. is a clutch plate (60m9) with multiple arrow pits;

60m10. is a clutch plate (60m10) with a plurality of polygonal pits;

60m5. is a clutch plate (60m5) with function wave;

60m11. is a clutch plate (60m11) with function wave;

60m12. is a clutch plate (60m12) with function wave;

60m13. is a clutch plate (60m13) with function wave;

54a, shock pad 54 a; 549. an auxiliary muffler pipe 54 g;

54d. a functional muffler pipe 54 d; 54e, fish scale wedges 54 e; variable cross-section ductwork 54f.

Detailed Description

the improved mowing apparatus for main shaft of engine is characterized by that firstly, a mowing blade for lawn mower without blade holder is made. The material of the steel plate suitable for manufacturing the cutter is preferably selected, and edge folds and a plurality of bulges are required to be punched so as to improve the modulus of the material mechanics and reduce the thickness of the steel plate; and appropriate pre-heat treatment such as semi-annealing and quenching and tempering, stretching forming or hot forming, and stamping forming to form the concave pits 2, the keys 1 and the key grooves 3, so that the inner diameters of the concave pits 2 are equal to or slightly larger than the outer diameter of the main shaft of the engine in tolerance. Then normalizing and performing effective treatment; and polishing, correcting and oiling or blackening. The middle of the bottom of the pit 2 is provided with a hole so as to facilitate the passing of a fastening bolt 17; if the keys of the existing machine type are long and are formed by directly punching and bending steel plates, the holes in the middle of the bottoms of the pits 2 are allowed to be combined holes of round holes and rectangular holes. If the outer diameter of the engine spindle for the lawn mower is 22.2mm and the fastening bolt 17 is 3/8-24UNF2B, the hole in the middle is a round hole with the diameter of 8-9mm or a combined hole of the round hole and a rectangular hole; and because the width of the rectangular hole is about equal to 4.775mm, the combination hole of the round hole and the rectangular hole is feasible. The keys 1 arranged in the key placing position area at the edge of the concave pit 2 can also be manufactured by welding or gluing. Two side surfaces of the square section, at least one side surface, are arranged and stuck in a key groove of the engine spindle; note that at least one side is referred to herein as being conventionally, i.e., the mowing blade is rotated clockwise, with the only direction, as viewed by the observer's eye toward the surface, so that only one side of the key is pushing. Particularly, the root of the key 1, namely the connection part of the key 1 and the steel plate of the knife and the edge of the pit 2 at the position area for placing the key, is preferably provided with a punched and bent crack-stopping groove so as to test out proper shearing strength, so that the grass can be cut through the key, and the root of the key can be overloaded and protected when the key is collided with a water pipe. It is recommended to sample the post-test corrections on a dedicated test stand. The method for correctly selecting the appropriate shear strength is briefly introduced and will not be described in detail. The second method of selecting proper shearing strength is a practice proving method, wherein the root of the key 1, namely the connecting part of the key 1, the steel plate of the knife and the edge of the pit 2, of the position area for arranging the key is provided with a punching and bending crack-stopping groove without wheels or is manufactured by welding or gluing, and practice proves that if the strength is still too high, a material-reducing digging method is adopted, namely the root of the key is dug to ensure that the section of the root part of the key is thinned so as to select proper shearing strength. The key groove 3 is a key groove with the same width as the key groove of the engine main shaft in the position area of the edge of the pit 2 for placing the common key 13, and is spare for some occasions, such as adding a semicircular key, for example adding a spare key. On the main shaft of the engine, for the model without self-walking, the mowing knife for the lawn mower without the knife holder is directly arranged in the key groove, the key 1 is aligned with the key groove of the main shaft, the pit 2 is arranged on the main shaft, and then the fastening bolt 17 is inserted, and the common bolts are all reverse threads instead of normal threads. On the main shaft of the engine, for the self-propelled type, a main belt wheel key with an arc-shaped end at the upper end matched with the arc-shaped end of the key groove of the main shaft and a main belt wheel key with a lower end connected with the key 1 is firstly arranged in the key groove, then the main belt wheel is arranged in the key groove, and then the grass cutter for the lawn mower without the tool apron is arranged in the invention, so that the key 1 is aligned with the key groove of the main shaft, the pit 2 is arranged on the main shaft, and then the fastening bolt 17 is penetrated, and the common bolts are all reverse threads instead of positive threads. Keys are critical, and it is preferable to weaken the body and test the torque, and to spot check in batches.

As different modes, as shown in fig. 8, it can be called as embodiment 1, and its characteristic is that at the connecting position of the key-placing position area of the edge of the pit 2, there is a key 1, and at the other side there is the key slot 3; a through hole 18 is arranged in the middle of the concave pit; the key 1 can be opposite to the key groove of the main shaft, and the key groove 3 is spare; for example, when some customers require the addition of a woodruff key; the key is modified, for example, by weakening its strength, cutting several places in the key, thinning, drilling, using weak materials, changing the steel key to an aluminum key or plastic piece, and making the key just enough to have the required shear torque, for example, 58 Nm, for self-clutching. For example, when the key 1 is damaged, a spare key can be added into the key groove 3, so that the knife can be recycled for multiple times. Or, the cutter itself is not used as a pit, the middle is still provided with a through hole 18, the cutter is flatly attached to the end of the spindle, the through hole 18 is aligned with the middle hole of the end of the spindle, a large pressure washer 16 is required to be arranged, and then a fastening bolt 17 is required to be arranged. Note that the bolts commonly used are all counter-threaded rather than positive. The balance of the two tool tips is also adjusted and the prosthetic foot test is performed.

In order to make up for the defect that the side surface of the common single knife only has edges and no teeth, particularly the end surface along the circumference has no teeth, the invention has made many improvements for many years. For example, materials from 65Mn to 40MnB, or ordinary steel plate carburization, have been available on trial; when manufacturing multiple teeth, the thickness is reduced by folding, and the pressing molding is carried out; the tooth profile is ideal when hot stamping is best used. Heat treatment such as carburizing and nitriding may also be used. The mechanism can be improved into the multi-tooth mowing knife for the lawn mower, such as a single knife, a plurality of knives, a fixed knife and a movable knife, and the shapes of the mowing knife are flat knife, folding knife, curved knife, blackening, black plastic spraying, seated mowing knife, unseated mowing knife and various mowing knives for the lawn mower. Referring to fig. 8, the multi-tooth mowing knife for the lawn mower mainly comprises a plurality of teeth 24 on the side, a plurality of teeth 25 on the top, a plurality of teeth 26 on the end, a wind fin cutting edge 27, or a middle through hole 18 additionally provided with a wind fin elliptical hole, a wind fin honeycomb and a knife body, a key 1, a pit 2 and a key slot 3; the side multiple teeth 24 are arranged on the side surface of the steel plate of the cutter body, namely the position of the original cutting edge, and on one side surface of the steel plate, by taking the through hole 18 in the middle of the cutter body as a reference in the advancing direction of the rotation of the mowing cutter, a plurality of teeth are arranged, at least 1, or more than hundreds, for example 16. If the number of teeth is less, the side is preferentially close to the outermost end of the rotating circumference; and at the outermost end of the circumference of rotation, said end teeth 26 are provided, at least 1, or up to tens, for example 3; the top teeth 25 are provided at the junctions of the side teeth 24 and the end teeth 26. The cross sections of the teeth of the side teeth 24, the end teeth 26 and the top teeth 25 have the same tooth characteristics, namely, bending or bow back; therefore, the steel plate can be punched and stretched out of the bow back by using a plurality of upper and lower modules which are the same with each other, and the steel plate is preferably heated and pressed, so that the steel plates on two sides of the bow back have a certain angle; the bottom of the bow back is ground flat to form the cutting edge 20. In addition, the common edges of the teeth of the side teeth 24, the end teeth 26, and the top teeth 25 are characterized by each of the teeth having sides and sharp corners; and the two sides or at least one side is provided with a cutting edge; sharp or rounded corners, intersecting less sharp corners, but roughly shaped with teeth having small heads and large roots; the side edges of the teeth are straight bevel edges, or are bent, arc-shaped or saw tooth-shaped, not the multi-tooth saw teeth of the whole cutter, but the cutting edge of each tooth is also in the shape of saw teeth; or convex or concave, in particular the sides of said teeth are curved, preferably involute. The multi-tooth cutter has the advantages that the length of the cutting edge is greatly increased compared with that of a single cutter, the multi-tooth cutter has multiple folding edges and multiple cutting and sliding angles, when the cutter is rotated in a flying manner, grass stalks and straws have strong efficiency, and the arched back type bottom grinding structure of the bottom edge enables the cutter to have wear resistance and save power consumption. Because the thing is flexible by the cutting, let careless phenomenon many during the single sword, hug careless function stronger when many folding edges.

The wind wing of the knife is provided with the wind wing cutting edge 27, and the knife is characterized in that the wind wing is provided with at least one or more gaps, for example 4 gaps, and the edge of each gap is also provided with the cutting edge 27 so as to cut off the grass winding, as shown in fig. 8; the notch can be firstly punched, then the cutting edge is ground, and then the wind wing is bent, so that the processing is easier, and certainly, a compound die can be used. The wind wing of the knife is additionally provided with the wind wing elliptical hole so as to punch multiple holes firstly and then bend the wing for better processing; at least one or hundreds, such as 6, elliptical through holes are formed in the blade, the wind fins have the functions of pushing grass and flaring when the mowing blade flies, and the noise reduction auxiliary function is realized when partial airflow passes through the elliptical holes of the wind fins. The wind fins of the knife are provided with the wind fin honeycomb 29, at least one wind fin honeycomb 29, or up to dozens of wind fin honeycombs, such as 6 wind fin honeycombs, particularly the wind fin honeycomb 29 is in a hexagonal pyramid shape, and a small through hole is formed in the middle; when the grass cutter is in flight, the wind wings have the functions of grass pushing and flaring, partial air flow passes through the wind wing honeycomb 29, and the noise elimination effect of the wedge honeycomb and the better noise reduction auxiliary function are achieved by matching the wind wing honeycomb 29.

The lawn mower, as the name suggests, just can mow. Either riding mowers, grass pressing mowers, or hand-propelled lawn mowers do not leave the mower blades. Although the form of the tool apron or the power transmission mode is slightly changed, the tool apron is not separated from the tool apron; the mower can have the safety protection function only by being provided with the torque, and is generally called as a mower with a cutter and a self-clutch.

The invention relates to a riding mower, which is mainly improved to ensure that the comprehensive effect is beneficial to wide mowing, comfortable operation and stepless speed change, and is beneficial to noise reduction, environmental protection and safety. Because of adopting various noise reduction measures and technical schemes and optimized graphic design methods, the riding mower with the noise reduction measures and hydraulic stepless speed change comprises a steerable front axle connected with two front wheels, a drivable rear axle connected with two rear wheels and provided with hydraulic stepless speed change, a frame with double bumpers above four wheels, a mowing device with noise reduction below the frame, an engine with a silencing groove and a hood 41 with noise reduction and an air filtering screen 44 with noise reduction above the frame, a saddle with noise reduction above the frame and in the middle part of the frame, a grass collecting box 50 with noise reduction and a body 50c behind the vehicle; and accessories such as earplugs, soundproof cotton, earmuffs and soundproof helmets for personal protection of the riding operator, the comprehensive quality of the accessories is improved. The steerable front axle connecting the two front wheels, included in the riding mower with noise reduction and hydraulic stepless speed change, is comprised of a left and right bent axle connected between the two front wheels 46 by a link, the upper end of the left bent axle is fixed to one end of a control lever by a knuckle arm, and the other end of the control lever is fixed to a gear with a steering wheel 48 and a tapered fluted disc, thereby facilitating steering. The improved teeth of the fluted disc are internal teeth, and particularly the inner tooth surface has conicity, but the original tooth surface does not have conicity; if the steering wheel is provided with external teeth, the external teeth are easy to give way, and the internal gear and the external gear of the steering wheel are not matched so as to realize tacit understanding; and because the existing improvement is tapered or chamfered, the gear is more easily matched with the inclined teeth. The taper is less than 30 degrees, preferably 18 degrees; because the toothed disc is mounted horizontally for connection to a parallelogram steering mechanism and the axes of the gears of the steering wheel 48 are angled from the vertical, typically 18 degrees, for ease of operation; the clearance of form and position tolerance is adjusted according to the actual situation and is lubricated by grease.

The function wave blade self-clutch riding mower is also provided with noise reduction measures and a hydraulic stepless speed change drivable rear axle connected with the two rear wheels 46b, and is beneficial to improving the gear. If a common mechanical gear engaging rear axle is used, stepless speed change can not be realized, and only the cost is low.

because the function wave blade self-clutch riding mower comprises a drivable rear axle with hydraulic stepless speed change and connected with two rear wheels 46b, two plunger pumps, a hydraulic control valve group and a plurality of gears are arranged in the drivable rear axle, the rear axle comprises two half shafts arranged between the two rear wheels, and a differential mechanism is arranged between the two half shafts, so that the differential mechanism is upwards and sequentially connected with a stepless speed change mechanism and a braking device of the second plunger pump and the hydraulic control valve group, is connected with a clutch mechanism of the first plunger pump through the hydraulic control valve group, and transmits the power of a main shaft 51 of an engine through a belt 62 of a belt pulley on a rotating shaft of the first plunger pump, the differential mechanism comprises a pair of half-shaft gears, a planet wheel assembly between the half-shaft gears, 2 planet wheels of the planet wheel assembly, and the number of teeth of; the planet wheel assembly is arranged on a larger gearwheel, preferably with 53 teeth; the big gear is meshed with the middle small gear, and the number of teeth is preferably 11; the middle pinion and the middle gear are coaxial and fixedly connected, and the number of teeth is preferably 48; the intermediate gear is engaged with the speed change gear of the second plunger pump, preferably with 13 teeth, so that a speed reducer is formed to increase the force, and a differential is formed to make the turning flexible. The number of the plungers of the second plunger pump is preferably 5, which is larger than that of the first plunger pump, and the cylinder diameter of each plunger is larger, so that the output torque is larger as an oil motor. Because the brake disc of the braking device is coaxially arranged on the speed change gear of the second plunger pump, the friction plate, the brake pull rod and the spring are arranged on the rear axle near the brake disc to form the braking device, the braking device is convenient to be connected with the foot brake and the hand brake in the middle of the frame; the foot brake and the hand brake of the vehicle are actually the same set of mechanism. A gear shifting rod is arranged on a hydraulic control valve group between the second plunger pump and the first plunger pump, so that an oil inlet and an oil outlet on the hydraulic control valve group are regulated and controlled, and the output rotating speed is changed by changing the angle of the inclined plane at the top of the plunger of the first plunger pump, so that the hydraulic control valve group is conveniently connected with a forward gear and a backward gear in the middle of a frame to form a stepless speed change mechanism; when the plunger is in a neutral position, the angle of the inclined plane at the top of the plunger of the first plunger pump is zero, so that the plunger rotates in a neutral position without output; the first plunger pump acts as a clutch; the forward gear is connected with the backward gear, the stepless speed change mechanism is operated, and when the forward gear is stepped, a gear shifting rod on a hydraulic control valve group between the second plunger pump and the first plunger pump regulates and controls an oil inlet on the hydraulic control valve group; the stepping is deep, so that the speed is high when the oil inlet is large; the stepping is shallow, and the speed is slow when the oil inlet is small, so that stepless gear shifting is realized; when the backward gear is pressed down, the gear shifting rod on the hydraulic control valve group between the second plunger pump and the first plunger pump is reversed, so that the oil inlet and the oil outlet on the regulation and control hydraulic control valve group are reversed, the second plunger pump is reversed, and the rear speed reducer and the differential are driven to be reversed to back the vehicle. Since the second plunger pump is used here in fact as an oil motor, it brings the speed change gear into engagement with a series of gears, thereby driving the two half-shafts and the rear wheel 46b. And a parking rod is further arranged on the hydraulic control valve group between the second plunger pump and the first plunger pump, an inner oil port of the hydraulic control valve group is regulated and controlled, and when the parking position is pulled, the D-shaped rod inside the parking rod blocks the inner oil port. An oil inlet valve is arranged in the drivable rear axle to be communicated with an external oil box, so that lubrication is convenient; the driving rear axle is also provided with a permanent magnet, preferably a horseshoe magnet, has good effect due to magnetic flow, and can be arranged at multiple positions, so that the driving rear axle is favorable for attracting scrap iron mixed into oil after each steel part is worn for a long time.

In addition, since the riding mower with noise reduction measures and hydraulic stepless speed change comprises a frame with double bumpers above four wheels, as shown in fig. 1, a bumper 45 is arranged in front of the riding mower, which is characterized in that: the bumpers are parallel bars, or three or more, each bar is a round pipe or a square pipe with two bent ends and a straight middle part, and at least two supports are used for supporting; the parallel bars should be safer than the single bars; as an improvement, the support is not rigid, but elastic, for example with a spring, or an elastic material such as rubber or polyurethane, which is more conducive to cushioning.

The riding mower with noise reduction measures and hydraulic stepless speed change comprises a mowing device with noise reduction below a frame, wherein the mowing device comprises a height adjusting part and a mowing part; referring to fig. 24, the height adjusting part is composed of a front fixed shaft (and a rear fixed shaft) arranged on the frame, a front movable shaft and a rear movable shaft arranged on the cutting disc 58, a rod connected with the front fixed shaft and the rear movable shaft, a steel wire rope, a sector gear, a pawl and a height adjusting handle, which are arranged on the frame, wherein the front fixed shaft and the rear fixed shaft arranged on the cutting disc are four vertexes of a parallelogram, the corresponding sides of the front fixed shaft and the rear movable shaft are parallel and equal in pairs, so that no matter how the steel wire rope is pulled by the height adjusting handle, a plurality of height adjusting gears are set by the sector gear and the pawl, the length of the connecting line of the front fixed shaft and the rear fixed shaft on the frame is always parallel to the front movable shaft and the rear movable shaft on the cutting disc, thereby basically ensuring the vertical translation of the cutting disc to normally work, but the length of the steel wire rope is adjusted when in practical use, and the allocated clearance of the sector gear and the pawl. The whole cutting disc is parallel at each gear, but moves forwards and backwards, and moves by taking the longitudinal projection of the distance from the power belt 61b to the first tool apron as a radius with the main shaft 51 of the engine connected with the power belt 61b as a circle center, and the belt 61b has a height difference, is oblique and can be used fortunately. Because the sector gear for adjusting the gear to be high has multiple teeth, 10 teeth are preferred, and 10 gears can be obtained, for example, the sector gear can be adjusted by cutting the height to be 10-100 mm; or according to the common 25-85mm, and divided into several files according to the requirements of customers. Referring to fig. 1, the power of the mowing part is transmitted from the main shaft 51 of the engine to the first cutter holder through the belt 61b and then transmitted to the second cutter holder through the synchronous belt 63, so that the mowing cutter 60 is driven to work. As an improvement, the grass cutter 60 can be provided with two or more wings, and in order to cut off entangled grass, the wings are provided with a plurality of cutting edges, and the included angle of the two surfaces of the cutting edges is not a right angle, and is preferably less than 60 degrees or an acute angle; as a further improvement, the mowing knife 60 is provided with a plurality of hexagonal holes, or the mowing knife 60 is further improved, and the mowing knife 60 is provided with a plurality of convex-concave parts such as honeycomb or wedges 29, so that the acoustic frequency of high-speed micro airflow passing through the knife is changed, namely noise is reduced.

The graphical design and the preferred thinking method of the mowing part of the noise-reduction mowing device provided with the function wave blade self-clutch riding mower are important contributions of the invention. As mentioned above, the original scheme of the riding mower with two cutters in tandem uses a double-sided V-shaped belt and three tensioning wheels, and the cutter is enlarged in the front and back direction, so that the whole mower is lengthened. The other two knives of the original riding type mower are not arranged in front of each other, but are reversely rotated, so that a relatively expensive double-sided synchronous belt is used, and two synchronous tension wheels are also used, so that the cost is increased. How can two knives be found, not in tandem, without enlarging the front and back of the cutting disc, without reversing the rotation, without using expensive double-sided synchronous belts, without grass leakage, and without knife collision? The answer is affirmative. By the preferred method: taking the distance between two tool tips of the strip-shaped tool 60 as the diameter D, drawing 2 circles according to the central distance A of the rotating shafts of the two tools, wherein the intersected front part of the two circles is represented by filled hatching, and the width B is the grass-tight heavy cutting width B; the diameter A is used as a circle, the circumferential angle is always a right angle, and because two cutters are arranged to mutually hang and rotate synchronously, the two cutters are two sides of the circumferential angle, and a plurality of circumferential angles can be additionally arranged for optimization. There is the formula: b ═ D-a. Changing A, firstly taking the belt wheel distance A as 0.618D according to the preferred method of 0.618, and then gradually increasing A until the maximum is close to D; when the knife is quickly bumped, the maximum re-cut width B and the minimum A are obtained. A affects the size of the cutting discs 58. And the formula is as follows:

The design ratio N is a/D, and is preferably 74% to 92% in general.

As another example, the design ratio N is 92% a/D, the tool length D is 530, and the tool center distance a is 490; the cutting width F of the mower is D + A, 530+ 490-1020, which is a little bit good; a repeating swath B-D-a-40 may also be used.

When the heavy mowing width B is not more than D-A and not more than 20, grass may be leaked, and the grass may be left and right swayed and fallen down by the mowing disc, so that the grass may be occasionally not mowed. In practice, the clearance between the inner periphery of the cutting disc and the cutting edge is preferably 3mm or more.

Because the PROE-WILDFIRE software is adopted, the drawing can be conveniently changed, and other software can be used.

After the cutter center distance A and the cutting disc are fixed, 4 auxiliary rollers 59 are arranged at the periphery of the cutting disc 58, and the new added content of the invention is as follows: preferably, the 4 rollers 59 are inflated with soft glue to make them soft for cushioning against the ground and to assist the cutting disc 58. When the grass is not level and uneven, the roller 59 is characterized by air inflation, soft material, and the buffer function of follow-up servo, and improves the flexibility of grass pressing without hurting grass roots, thereby improving the gear of the whole machine.

because the riding mower with noise reduction measures and hydraulic stepless speed change comprises the engine with the noise reduction groove and the noise reduction hood which are arranged at the front part above the frame, as shown in fig. 23 and 34, the engine is omitted for the purpose of clearing and avoiding blocking; the silencing groove provided by the invention comprises a silencing pipe 47 and a water groove 42; the lower bent pipe of the muffler pipe 47 is immersed in the water tank 42, thereby having a cooling effect. The water tank has the function of killing two birds with one stone, and water is used for replacing a heavy object besides cooling; it is arranged at the front part of the mower, so that the mower has the function of counterweight. The water in the water tank is added only when the water tank is used temporarily, and the transportation weight is not counted; half of the water is added instead of filling the tank. The lower end of the lower bent pipe of the silencing pipe 47 is connected with the outlet of the silencer. The water tank 42 is characterized in that the side surface is provided with a through hole so as to be matched with the lower bent pipe of the silencing pipe 47; the bottom of the water tank is provided with a water outlet. The silencing pipe 47 is composed of a plurality of sections of inner pipes 47a, a connecting piece and an outer pipe containing a plurality of wedge 29 arrays of micropores. The inner pipe is arranged in the outer pipe, and the inner pipe 47a is characterized in that honeycomb hexagonal holes, or polygonal holes, or elliptical and oblong holes are arranged on the inner pipe; the lengths of the inner pipes in the multiple sections are different and alternate; for example, if there is a longer inner tube that is three quarters of a wavelength multiplied by a factor, then the next inner tube is one quarter of the wavelength multiplied by a factor. In addition, the distribution of a plurality of holes arranged on the inner pipe is not uniform but sparse and dense; the part of the middle quarter of the tube length on one section of the tube with the three-quarter wavelength multiplication coefficient is provided with dense holes, and the rest part of the tube is provided with sparse holes; and the holes are characterized by hexagonal holes or polygonal holes; the inner tube with the quarter-wavelength multiplication coefficient is characterized in that the distribution of a plurality of holes is not uniformly distributed but is sparse and dense; the part of the middle part of the pipe, which is three eighths of the length of the pipe, on the section of pipe is provided with dense holes, and the other part of the pipe is provided with sparse holes. Said holes are polygonal, preferably hexagonal; as an improvement, or the eyelet is characterized by being polygonal, hexagonal or a polygon flanged with a spanner; or the holes are characterized by said micro-perforated wedges 29, so that they have a quarter-wave effect and a dilatational wave effect and a honeycomb effect. The surface of the outer pipe can be provided with a plurality of protrusions which are formed by punching and are in a multi-pyramid shape, namely a multi-face pyramid shape, particularly a six-pyramid shape, and the protrusions are called wedges 29; the wedge is characterized in that the root of the metal plate which is punched is hexagonal, the width of the wedge is reduced from the root to the top, and the width-depth ratio of the wedge is approximately one to one or one to one and one to five. And the top of each of the six-pyramid shaped wedges on the surface of the silencing tube is provided with a micropore, and the diameter of the micropore is preferably approximately 0.1 to 0.5 mm. The surface of the inner tube 47a may be modified to have a plurality of press-formed protrusions, and may be formed into a polygonal pyramid shape, particularly a hexagonal pyramid shape, or a wedge shape, as an improvement, or the holes may be modified to have a width-to-depth ratio of one to eight or at most four to one. The wedges form a wedge multi-edge structure, and the arrangement of the wedges on each surface is honeycomb-shaped hexagonal polygon, or random, or oval, long round or irregular convex-concave; metal fibers or temperature-resistant non-metallic materials can be filled in the silencing pipe or can be filled in the silencing pipe; or may be half filled with a sound absorbing material resistant to medium temperatures, such as a porous sound absorbing material, or a flexible material and a film-like material. Or sticking, or directly molding, or adding azo foaming agent in the mould to make the outer part hard and the inner part hard to solidify. Such as fibres, foams, granules, alone or in more or less mixed applications. Also usable are fibers such as rock wool, or glass wool, especially ultra-fine glass wool; or foam, which is to be fireproof at the position close to the hot part; or filling or attaching with particles such as expanded perlite, porous pottery clay brick, and temperature-resistant fabric or felt; therefore, the performance index is improved, and the comprehensive composition achieves the purpose of better noise reduction effect. The materials have complementary high and low frequency sound absorption capabilities. The wedges increase the heat dissipation area; in particular, the wedges with the micropores not only have the micropore effect of noise reduction, but also have the potential effect of discharging excessive gas and liquid. As the extension, the wedges can also be reversely stretched, namely outward to increase the heat dissipation area. A gasket serving as both a heat insulating pad and a shock absorbing pad may be further assembled between the muffler and the engine. A gasket serving as both a heat insulating pad and a shock absorbing pad may also be fitted between the outlet of the muffler and the muffler pipe 47. The silencing groove provided by the invention is provided with a plurality of large-area wedge areas, comprises a plurality of wedges with micropores, and has wedge resistance reduction effect and micropore effect. The silencing groove provided by the invention has the beneficial effects that: increase the silencing effect and improve the comprehensive performance of the silencer, such as insertion loss, sound transmission loss, noise reduction and attenuation, and cooling. One inventive concept is to wander like ghost: if thick and soft foam plastics are used or improved, the various noise-damping and vibration-damping materials are comprehensively utilized, and a plurality of large-area wedge areas are used, and are arranged on the mowing table 58, a plurality of places of the mower, such as a head cover 41, for example, a mower body 50c, a noise-reducing saddle arranged at the rear part of the middle part above the mower frame, and a noise-reducing grass collecting box arranged at the rear part of the mower, so that the safety protection and the noise reduction effects are achieved. In addition, the present attachment is equipped with earplugs, sound-proof cotton, earmuffs and sound-proof helmets for personal protection of the seated operator. And artificial foot protection plates with rotating hinges are arranged on two sides of the middle part of the mower. The artificial foot protection plate with the rotating hinges arranged on the two sides of the middle part of the mower consists of a protection plate and the rotating hinges; the protective plate is characterized in that the protective plate is made of sound-absorbing material and is arranged on the left and the right; however, when the side grass discharge plate is sometimes arranged on the right side, the foot protection plate is only arranged on the left side; the protective plate is preferably foot-shaped, namely, has a wave shape with two slightly larger ends, and can be referred to as a figure 3, so that the warning association and the artistic image of the foot with great care are enhanced; the protective plate is preferably made of a relatively soft but not too soft material with a Shore hardness of 65 to 95 such as rubber, polyurethane or polyvinyl chloride, and has the advantages that the flexible plate is less prone to damage grass when placed horizontally for work, for example, on both sides of the cutting disc 18, and the flexible plate is more convenient to pack. The protective plate can also be made of hard materials. The protection plate edge be equipped with mobilizable hinge, do not limit one or many or with flexible material, assist again with the definite spacing that can just end, as long as enable the protection plate let go can work and turn up and go to be convenient for vanning just can. As extension or improvement, the protection plate can also be detachable and can be put on when in work and taken off when not in work. In order to prevent the trouble, the prevention is mainly carried out, and the complete machine for delivering goods in large quantity can be ensured to pass through the prosthetic foot detection. The fender can also be used elsewhere in the fuselage, for example above the two rear wheels. As another example, the entire car may be made of sound insulating material to be not open, but roofed, or fully enclosed, to facilitate sun protection, or to provide sound insulation. Foaming materials, porous sound-absorbing materials, such as foaming cement or foaming plastic, or flexible materials and film materials, or double-layer blow molding parts can be used at all parts of the machine head body; or sticking, or directly molding, or adding azo foaming agent to form external hard and internal foaming in a mould to be solidified; or double-layer blow molding into honeycomb with large area and wedge-shaped convex-concave shapes, such as machine head and machine body. In summary, there are various noise reduction measures: not only utilizes different characteristic impedances of sound absorption materials to reduce reflected sound, but also utilizes the principle of small hole low-frequency diffraction shadow area to arrange a sound barrier to weaken high-frequency noise. The number of the earplug pre-mode earplugs is more, and the earplugs are molded into a certain geometric shape by soft plastics or soft rubber; or with a foam earplug; therefore, the sound insulation and comfort are certain. The sound-proof cotton is made of superfine glass wool through chemical softening treatment, and the diameter of the sound-proof cotton is preferably 1-3 microns; the small cone is made, so the ear is convenient to be plugged; the sound insulation effect of the sound-proof cotton is better than that of common cotton, and the sound insulation value is improved along with the increase of the noise frequency, so the sound-proof cotton is more effective for isolating high-frequency noise, and the use of the sound-proof cotton not only has no obstruction to the language connection, but also improves the language definition. The ear muffs are ear protection devices like earphones or music ear muffs, so that the pleasure of work can be increased. The sound-proof helmet is a motorcycle helmet, so the sound-proof helmet also has a security function.

and because the saddle that has the noise reduction of the middle part inclined to the back above the frame also has the characteristic: the saddle is wrapped with thick noise reduction foam materials, and the saddle can move back and forth; the saddle is provided with a limit protection switch which is connected when a person sits down and is not connected when the person leaves; or a non-contact human body sensor, namely a sensor, so that the protective effect is also achieved. The grass collecting box 50 with the noise reduction function is arranged at the rear of the vehicle, and 2 hooks are arranged on the rear of the vehicle, and the grass collecting box is characterized by being S-shaped, so that the grass collecting box can be conveniently hung on 2 hangers arranged behind the vehicle frame and provided with pins, and the pins are movably clamped in the S-shaped, so that the grass can be conveniently poured and taken by manually rotating the angle. The single-sided synchronous belt which drives the two knives in the same direction is too tight in a workshop and is not easy to install on a production line; if loose, it is easy to skip occasionally and not synchronize. In order to mount the single-sided synchronous belt 63 which drives the two cutters in the same direction, a tension pulley is additionally arranged, and the tension pulley is in toothless surface contact with the single-sided synchronous belt 63, so that the tension pulley is a toothless circular wheel; the tensioning wheel is arranged on the tensioning support, the tensioning support movably takes the fixed bolt as a lever fulcrum, and the adjustment bolt and the adjustment nut on the fixed small adjusting frame can be used for presumption, so that the installation is convenient, and the asynchronous phenomenon is eliminated.

The whole car is made of the sound insulation material, is not open, is topped, or is in a fully closed car type, or is made into a large-scale whole car, and is beneficial to sun blocking or full sound insulation; or several large pieces. The machine head body can be arranged at any position or integrally. The cowl 41 and the body 50c may be integrated or spliced. For example, the body 50c may be divided into two large blocks, front and rear, and the rear large block may be inserted and combined to form an upper cover of the grass collecting box. All parts of the machine head body or the whole or all the parts are also mainly of an anti-noise structure, such as the machine head body and the header which are molded and stretched by steel plates into honeycomb wedge convex-concave shapes, or honeycomb wedge convex-concave large parts which are attached to iron plates and molded by injection molding, and then the machine head body is matched with sound insulation materials such as foaming materials, porous sound absorption materials, foaming cement or foaming plastics, or flexible materials and film-shaped materials; either attached or directly molded. Or adding an azo foaming agent into the mould to form a structure which is solidified by foaming in the inner part and the outer part, such as a portable refrigerator; or double-layer blow molding to form large-area honeycomb and wedge-shaped convex-concave various large blow molding parts, such as a machine head and a machine body, and then attaching thick foamed plastic. In summary, there are various noise reduction measures: not only utilizes different characteristic impedances of sound absorption materials to reduce reflected sound, but also utilizes the principle of small hole low-frequency diffraction shadow area to arrange a sound barrier to weaken high-frequency noise. Two vehicle lamps 3 are arranged at the joint of the noise-reducing hood 1 and the noise-eliminating air filter screen 4, so that the attention is paid to not too much noise leakage of a bonding seam and temperature rise; if the lamp is an LCD luminous tube, the temperature rise is not a problem; of course, other types of lamps may be used in the interim.

the present invention has been perfected on a number of antecedent bases. When in actual mowing, the knife is sometimes damaged by stones; also as specified by the blade test, the steel tube extended into the blade cutting zone, was not allowed to break, but was bendable, which motivated us to make an improved self-clutched blade mower, and a guarded cutter. The multiple cutters are changed, and then a plurality of parts related to the self-clutching of the cutters are changed. The purpose is in order to overcome lawn mower prior art's conventional grass cutting device used part is more, and inertia is great, consumes power more, and the sword is rigid connection, does not have the shortcoming of safety protection. The improved cutting mechanism of the lawn mower is provided, is a knife without an independent knife holder for the lawn mower, is called as a grass cutting knife without a knife holder for the lawn mower, can reduce parts and cost; secondly, the weight is reduced, and the power consumption is reduced; thirdly, the device has the function of safety protection. However, there are several types of already formed mower cartridges and accessories that are intended to be easily modified for use, and so there are several variations, including several clutch pin cartridges and many deformed end-face friction cartridges. Several end-face friction upper and lower clutch plates, especially multiple function wave clutch plates, can be used for multiple tool holders, such as end-face friction tool holders; the function wave clutch plate can be used for a function wave knife clutch riding machine and can also be used for clutches of various electromechanical products.

Because the improved blade self-clutching mower blade holder assembly with the clutch pin for the lawn mower mainly comprises the blade 60, the blade holder 60a, the power pulley 60d, the blade clutch pin 60c and the elastic ring 60e, the blade 60 is arranged on the blade holder 60a, and the blade holder 60a and the power pulley 60d are arranged on the engine spindle with the pin slot, the lawn mower is characterized in that: the tool apron 60a is provided with a pin hole for placing a tool clutch pin, see fig. 29; the pin hole can receive a knife clutch pin 60c, see FIG. 11; an elastic ring 60e is externally arranged, see fig. 15; the head of the clutch pin 60c is provided with an inclined plane, or 2 inclined planes, see fig. 11 and 14, or an arc plane, or an involute plane, so that when the torque is too large, the radial component force on the inclined plane exceeds the specified 68Nm, and the inclined plane makes the clutch pin move back and forth; the tail part of the cutter clutch pin 60c is provided with a concave surface so as to be convenient for installing an elastic ring; the elastic ring 60e is an annular tight-ring spring; of course, the elastic ring can also be a rubber ring; or the tail part of the clutch pin is provided with a pressure spring or a torsion spring. Because the push-ride dual-purpose mower and the grass pressing mower are seen in fig. 14, the tool apron 60a2 and the power pulley are integrally cast aluminum and are arranged on the main shaft of the engine with the pin slot, the pin hole is arranged between the pulley and the tool apron, the tool clutch pin 60c is arranged, the elastic ring is arranged, and the elastic ring can be directly arranged by a rubber ring; the annular close-coil spring is either complete or hooked by a straight long close-coil spring; the diameter of the wire and the diameter of the ring are combined, and the fact that the force is large when the diameter of the wire is large and the diameter of the ring is small is noticed, the influence on the material and the heat treatment is caused, after primary selection, the test is carried out again, and the production is determined. The elastic ring is a rubber ring, and is solid, and the section of the elastic ring is circular; or hollow, with a cross-section in the shape of a circular tube; if the tail part of the clutch pin is provided with a pressure spring or a torsion spring, the tail part of the clutch pin is preferably drilled with an axial hole with the depth being half of the total length of the pin so as to be convenient for inserting a steel wire of the pressure spring or the torsion spring. The wire diameter of the elastic ring is preferably round; of course, a flat band spring may be used.

the self-clutching blade is used for cutting grass actually, and can be opened without damaging the blade when meeting stones, and for passing a specified blade test, namely, a steel pipe is stretched into a cutting area of the blade, is not allowed to be broken, but can be bent, so that the improved self-clutching blade mower and various protected cutters are made. Firstly, a plurality of cutters are changed, and then a plurality of parts related to cutter self-clutching are changed; the purpose is to overcome the defects that the conventional mowing device in the prior art of the lawn mower has more parts, larger rotational inertia and more consumed power, and the cutter is rigidly connected and has no safety protection; the improved cutting mechanism for lawn mower has several deformed friction end plates and several friction plates. The key point is that the improved function wave friction plates with end surface friction can be used for clutching the cutters of various cutter holders and the power pulley of the riding mower, so that the problem that the riding double cutters cannot be clutched well in synchronization is solved.

because several lawn mowers such as those of fig. 18 and 19 use a knife-mounted end clutch cartridge, a variety of friction clutch plates are used. The cutter holder assembly with the end clutch for the mower with the cutter self-clutch mainly comprises an end clutch cutter holder 60a3, a cutter holder lower pressing sheet 60b3, a cutter holder lower clutch sheet 60k, a cutter holder upper clutch sheet 60m, a cutter 60h, a cutter holder inner cushion block, a power shaft and a cutter fastening bolt, wherein the power shaft and the cutter fastening bolt are not shown; the end surface of the cutter holder 60a3 with the end clutch is provided with a groove which is matched with a lug arranged on the cutter holder lower pressing sheet 60b3, and when the lug is matched with the cutter holder lower pressing sheet, the root of the lug is larger, so that no matter how the cutter holder is clamped in the middle and is clamped tightly, a gap is always reserved between the large plane of the cutter holder with the end clutch and the large plane of the cutter holder lower pressing sheet; or the end face of the tool apron is provided with counter bores to replace grooves, and the pressing sheet under the tool apron is provided with limit nails to replace bumps, more than two pairs are needed, as long as the effective length of the limit nails is greater than the depth of the counter bores, a gap is formed, or nails are repaired or pads are added to ensure that the gap is proper. Then, proper upper clutch plate 60m and lower clutch plate 60k of the cutter holder are arranged at the gap, when the self-clutching cutter is used normally, after the self-clutching cutter is assembled, the friction force of the upper clutch plate and the lower clutch plate of the cutter holder is enough to enable the cutter to rotate, so that when the self-clutching cutter is abnormally bumped with a stone or a steel pipe, the friction force of the upper clutch plate and the lower clutch plate of the cutter holder is not enough, the cutter slips, and the self-clutching action. In order to compensate for possible manufacturing and assembly tolerances, the material of the upper clutch plate and the lower clutch plate of the tool holder is selected to be soft, not from steel, but from plastic, preferably from PP, polypropylene or PU, polyurethane, although other soft materials, such as fabric, can be used; or the mixture of plastic and fabric; or a pressure sensing sheet is arranged; or a function friction plate is arranged; the upper clutch plate and the lower clutch plate of the tool apron are subjected to various deformation improvements, so that the assembling friction resistance suitable for self-clutching is facilitated; for example, referring to fig. 20 and 21, the end clutch tool apron for the mower with the blade clutch has a multi-tooth tool apron lower clutch plate 60k, at least 2 teeth, at most 100 teeth, and multiple teeth are arranged uniformly in a circumference or in parallel to form a convex-concave shape; each tooth of the multiple teeth is preferably in a sawtooth shape, namely, each tooth is preferably a protruding block with a right angle at the left side and an obtuse angle at the right side so as to adapt to the characteristic of unidirectional rotation of the mowing knife; for another example, referring to fig. 22, a multi-tooth upper clutch plate 60M1 of an end clutch seat for a mower with a blade clutch is similar to the multi-tooth lower clutch plate 60k, i.e. at least 2 teeth and at most 100 teeth, and the multiple teeth are arranged uniformly in a circle or in parallel to form a convex-concave shape; each tooth of the multiple teeth is preferably in a sawtooth shape, namely, each tooth is preferably a protruding block with a right angle at the left side and an obtuse angle at the right side so as to adapt to the characteristic of unidirectional rotation of the mowing knife; but also complement, that is, the multi-tooth not only is a single surface, but also can be provided with double surfaces; the double-sided arrangement is also suitable for the following and all upper clutch plates. For example, referring to fig. 23, a schematic view of a multi-convex-concave blade holder clutch plate 60m2 of an end clutch blade holder for a mower with blade clutch is shown, which has a large end, or has multiple convex-concave with different depths, and the convex-concave is either round or square, and also has different depths, so as to select a proper clutch, or the deep concave can be used for placing multiple small balls, so as to better select a proper clutch; as a further improvement, referring to fig. 24, a cutter seat clutch piece 60m3 with multiple wave forms is provided on the end clutch cutter seat for the mower with cutter clutch, and multiple wave forms are favorable for matching proper clutch degrees. As for knives, like knife 60h, see fig. 18, are customer specific knives, but somewhat larger; for the self-clutching of the knife, a plurality of sections of flail knives can be used, each side is at least 3 sections, each section is movably riveted or screwed, a first section of the flail knife connecting seat can be provided with a concave arc, and a gap is reserved; flail knife or with a chain with edges; or nylon rope and steel wire rope are used as knife, and special-shaped nylon thread with edge is preferably used, so that the clutch function is realized. As an improvement, the clutch plate on the tool apron is also designed with a plurality of types of function wave clutch plates which can be selected by various lawn and grass pressing mowers, so that the clutch is diversified and the application models are more.

the end clutch tool apron for the mower with the cutter clutch, which is provided with the upper clutch plate of the tool apron and the lower clutch plate of the tool apron, is originally also used for a riding type mower, namely a riding type mower, but because double cutters of the riding type mower need to be synchronized, the single cutter cannot be automatically clutched by the cutter blade, and if one cutter is separated and the other cutter is closed, the two cutter angles are not vertical and are close to each other, so that the risk of getting up exists. How should this problem be solved for a blade self-clutching riding mower? The main shaft of the engine is provided with two belt wheels of a belt 62 for driving a rear axle and a belt 66b for driving the cutter, and the power of the main shaft 51 of the engine is transmitted to the first cutter seat assembly through the belt 61b and then transmitted to the second cutter through the synchronous belt 63 from the cutter head, so that the double cutters can move and stop as long as the power belt wheel 61c of the first cutter seat assembly is clutched automatically, and the problem is solved. The first cutter seat assembly is shown in the position of the whole vehicle in figure 4. The first cutter base assembly of the riding mower is mainly composed of a cutter 60, a cutter base 14, a cutter support 68, a synchronous belt pulley 63d, a first cutter shaft 69, a power belt pulley 61c, a clutch sheet 60m without wave or with function wave, a pressure plate 61d, a large pressure gasket 16 and a fastening bolt 17, as shown in an exploded view of the first cutter base assembly with the function wave clutch sheet in fig. 9, and is characterized in that: the cutter support 68 is fixed on the cutting disc, the first cutter shaft 69 is installed in the cutter support through a bearing, the cutter 60 and the cutter holder 14 are installed at the cutter end of the first cutter shaft 69, the synchronous pulley 63d, the power pulley 61c, a clutch sheet 60m without waves or with function waves, a pressure plate 61d, a large pressure gasket 16 and a fastening bolt 17 are sequentially installed at the power end of the first cutter shaft 69, the synchronous pulley is fixedly installed on the shaft through a key, the rest of the synchronous pulley is sleeved and pressed on the shaft through friction, the function wave clutch sheets can be installed on both sides of the power pulley 61c, and the clutch sheets with function waves are generally suggested to be used, so that the clutch effect is more reliable. When the power belt wheel 61c is overloaded, the clutch is engaged and disengaged through the slipping of the function wave clutch plate; the power pulley 61c can also be made into a clutch pin type for clutch as shown in fig. 12, that is, a side pin hole is opened on a pressure plate 61d, the knife clutch pin 60c is put in, and the elastic ring is externally covered; as an improvement, or as a combination, namely a combination of a clutch pin type and an end face clutch with a function wave clutch plate. The selection of which clutch is selected may be a function of the model. The clutch plate 60m without wave or with function wave is universal, and the type of clutch plate is determined according to various types of machines. As an improvement, a clutch plate 60m7 with a plurality of round pits is additionally arranged, as shown in figure 25, and the clutch plate is characterized by a plurality of round pits, preferably the pits are of concave spherical shapes; as shown in fig. 27, the clutch plate 60m8 having a plurality of triangular pits is characterized in that a plurality of triangular pits are provided, preferably, the inside of each pit is concave; as further shown in FIG. 28, clutch plate 60m9 having multiple arrow-head pits is characterized by multiple arrow-head pits, and preferably also has a hollow shape; as shown in fig. 29, the clutch plate 60m10 with a plurality of polygonal pits is characterized in that the pits are polygonal and preferably concave; to facilitate accumulation of the suspended hot air cushion effect.

SD ═ D ═ SIN (TRAJPAR ×. 360 × B), wave number B, amplitude D, and can be selected as desired, for example, from 0.1 to 100.

The PROEWIDFRRE or other software is used for inputting the parameter equations, so that the modeling can be conveniently realized; and inputting the parameter equations into a CNC machining center, setting the middle part as a parting surface and setting a side slide block to manufacture the injection mold, and suggesting a plurality of molds.

Not only does the clutch plate have much room for improvement, but the knife also has much room for improvement. For example, a plurality of sections of flail knives are arranged, each side of each flail knife is at least 3 sections, each section of flail knife is movably riveted or screwed, a concave arc is arranged at the position, close to the knife seat, of the first section of the knife connecting seat, a gap is reserved, and therefore micro motion is facilitated; the flail knife has the beneficial effect of self-clutch protection. Throwing the bricks to make jade, namely throwing the cutters, not only making the bricks into a plurality of sections, but also further making the bricks into semi-flexible chains or fully flexible nylon ropes or steel wire ropes; or the combination of the two, or nylon wraps the steel wire rope, or nylon twists the steel wire rope. As an improvement, the chain is provided with a blade. For another example, a tool apron which is in clearance fit and enables a tool to be automatically separated and reunited can be changed into a plurality of clearances with limiting positions, and two counter bores can be drilled on the end face of the tool apron to replace grooves; two limit nails, or pins or screws are arranged on the end surface of the pressing sheet under the cutter seat, and the effective length of each limit nail is slightly larger than the depth of the counter bore to replace a bump; if the limit nail adopts a screw, the limit clearance can be finely adjusted, the tightness is easy to control, but the limit nail is slow in batch. It is therefore readily understood that the specific refinement of the structure of the end clutch friction to enable self-clutching of the knife, and the improvement of the clutch plate, as well as the function wave clutch plate, is numerous.

The riding mower originally only has one rear large grass collecting box which is too heavy and inconvenient to take down, so that two left and right double grass boxes are changed, but the problem comes, the grass in the left and right double grass boxes is always more on one side and less on the other side; after a plurality of schemes are tried, the problem is solved that how to uniformly load grass in the left and right grass boxes to obtain a riding machine with self-adjusting left and right grass boxes for balancing; the method is finally conceived.

a riding machine with a double grass boxes for feeding grass by a flexible suspension auger is characterized in that a grass collecting box frame (50) is arranged at the rear part of a vehicle body (50c), and a grass collecting large pipe (10) is arranged on the vehicle body so as to feed grass from a grass cutting disc to the upper part of the grass collecting box frame (50); a box cover is also arranged above the grass collecting box frame (50); the grass collecting box frame is characterized in that a longitudinal pipe is arranged at the rear part of the vehicle body (50c) along the central axis of the vehicle body and serves as a balance rotating shaft, a balance rotating base (7) is arranged in the middle of the grass collecting box frame (50) and is matched with the balance rotating shaft, frames are arranged on the left side and the right side of the grass collecting box frame (50) so as to be placed in a left grass box (5) and a right grass box (6), a left grass scale plate (8) and a right grass scale plate (9) are arranged on the balance rotating base (7) arranged in the middle of the grass collecting box frame (50), the left grass scale plate (8) and the right grass scale plate (9) are acute angles, the left grass scale plate (8) and the right grass scale plate (9) are symmetrical relative to the balance rotating base (7), and the left grass scale plate (8) and the right grass scale plate (9) form a door plate of a valve of a flow distribution cone; when in balance, the acute angle between the left grass scale plate (8) and the right grass scale plate (9) is just under the grass outlet at the upper end of the grass collecting large pipe (10); when grass is discharged, the grass is sent to the upper part of the grass collecting box frame (50) from a grass cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10), and the grass enters the left grass box (5) and the right grass box (6) respectively under the influence of door plates of flow distribution cones of the left grass scale plate (8) and the right grass scale plate (9); when the grass is divided in an unbalanced manner, the right grass box (6) has more grass and inclines downwards, the grass is sent to the upper part of the grass collecting box frame (50) from the grass cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10) with reference to fig. 37, and the grass enters the left grass box (5) for adding more points under the influence that the acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are inclined to the right through the guide of the left grass scale plate (8); when the grass is divided and unbalanced, the left grass box (5) has more grass and is inclined downwards, the grass is sent to the upper part of the grass collecting box frame (50) from the grass cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10) referring to fig. 38, and the grass enters the right grass box (6) for adding more points under the influence that the acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are deviated to the left and are guided by the right grass scale plate (9); the balance of the left grass box and the right grass box is automatically adjusted in cycles; in order to prevent the grass from being fed from the chassis to the high double grass boxes by the grass collecting large pipe (10) and sometimes the phenomenon of grass leakage under the chassis is not smooth, a flexible suspension screw feeder (10a) is arranged in the grass collecting large pipe (10), and is a soft and elastic spring steel wire with spiral and corrugation and driven by a motor (10c) with a planetary reducer, which is arranged above a mouth of the grass collecting large pipe and is arranged on the box cover, so that grass can be fed from a grass cutting disc to the upper part of the grass collecting box frame (50), and the riding machine with the flexible suspension screw feeder and the grass feeding double grass boxes is formed.

The beneficial effects are that the two grass casees balance and send the grass smoothly about self-adjusting, are favorable to the gardens operation:

A riding machine with a flexible suspension auger and double grass conveying boxes is characterized in that a balance rotating shaft is arranged on the rear portion of a vehicle body along the central axis of the vehicle body, a balance rotating seat (7) is arranged in the middle of a grass collecting box frame (50), and a left grass scale plate (8) and a right grass scale plate (9) form a door plate of a valve of a shunting cone; when the left grass box (5) has more grass and is inclined downwards, the grass enters the right grass box (6) to add more points under the influence that the mutual acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are deviated to the left and are guided by the right grass scale plate (9); and the balance of the left grass box and the right grass box is automatically adjusted in cycles. In order to prevent the grass from being fed into the high double grass box and the grass from leaking under the chassis, a flexible suspension screw (10a) is provided, which is a soft and elastic spring steel wire with spiral and wave and is driven by a motor (10c) with a planetary reducer.

The wind wing honeycomb (29) arranged on the mower blade is in a multi-pyramid shape, and the middle part of the blade is provided with a through hole (30) which is in an oval shape; the blade part of the mower blade is provided with graphene indium plating; the cutting edge of the mower blade is subjected to laser quenching treatment; the included angle between the edge line of the multi-pyramid shape of the wind fin honeycomb and the bottom surface is larger than a 115-degree infiltration climbing angle theta; the blade of the mower is provided with a siphon so as to enhance the cooling and lubricating and the comprehensive action on grass; liquid containing growth vitamins is dripped from a siphon arranged on the blade of the mower, so that the liquid has the functions of stirring, smashing grass and supplementing feeding and also has the function of soothing the grazing wound to promote growth; when the blade of the mower rotates at a high speed, a plurality of short and soft mop cloth strips are arranged on the periphery of the chassis of the blade of the mower, and an air cushion is formed between the mop cloth strips and the lawn, so that the grass roots cannot be cut by a knife.

An engine capable of further reducing noise is characterized in that the engine comprises silica gel shock pads (54a), small tubes of a function silencing tube (54d), a small tube of an auxiliary silencing tube (54g), fish scale wedges (54e) and a variable cross-section air pipe (54 f); an exhaust port of a cylinder of the engine is connected with the catalyst-containing muffler pipe (69), and noise is reduced through a functional muffler pipe (54d), a small pipe of an auxiliary muffler pipe (54g), a fish scale wedge (54e) and a variable cross-section air pipe (54 f); the silica gel shock pad (54a) and the serially connected variable cross-section air pipe (54f) are arranged on the air outlet direction side of the catalyst-containing muffling pipe (69) connected with the exhaust port of the cylinder body (g 44); the function silencing pipe (54d) is arranged in the variable cross-section air pipe (54 f); said functional muffler tubes (54d) are spaced apart and connected in series and are axial along a decreasing amplitude curve that approximates the odd function of a plurality of finite sine wave trains having one-third octave periods; the length and the pipe diameter of each silencing pipe combined by the plurality of function silencing pipes (54d) for multi-stage silencing are changed, and the length of each silencing pipe is shortened in a penetrating way and the pipe diameter is gradually reduced when the silencing pipes are seen from front to back, namely in the air outlet direction; the function muffling pipes (54d) are combined into a plurality of fish scale wedges (54e) and wedges (50d) with through holes, wherein each muffling pipe for multi-stage muffling is provided with the fish scale wedges (54 e); the fish scale wedges (54e) are provided with arc-shaped small narrow openings and wedges (50d) with through holes; the function muffler pipe (54d) is also provided with an auxiliary muffler pipe (54g) of an auxiliary side branch; the auxiliary silencing pipe (54g) is a small pipe, and a wedge (50d) with a through hole is arranged on the small pipe; the variable cross-section air pipe (54f) is variable in cross section, and at least three parts of the variable cross-section air pipe are expanded and three parts of the variable cross-section air pipe are reduced; the variable cross-section air pipe (54f) is bent, and at least three parts of the variable cross-section air pipe are provided with bends; the outlet air enters a first function muffling pipe (54d) arranged in the variable cross-section air pipe (54f), and a plurality of small arc narrow openings and wedges (50d) with through holes arranged on the fish scale wedges (54e) arranged on the muffling pipe are compressed and then expanded to complete a first-stage muffling process, and small pipes of auxiliary subsidiary muffling pipes (54g) arranged on the function muffling pipe (54d) provide a plurality of paths for the air flow without being mixed from a main pipe so as to further improve the muffling effect; the variable cross-section air pipe (54f) is variable cross-section, and the airflow flows from the expansion part to the reduction part to assist the compression and expansion; the variable cross-section air pipe (54f) is bent and has a turning function, so that the auxiliary effect of preventing main noise from being directly transmitted is achieved; the airflow coming out of the first function silencing pipe (54d) after the first-stage silencing process is expanded in the enlarged cavity of the variable cross-section air pipe (54f), passes through a curve, then enters the second function silencing pipe (54d) with the variable length and pipe diameter, and is compressed and expanded again through the auxiliary silencing pipe (54g), the small arc-shaped narrow opening of the fish scale wedge (54e) and the wedge (50d) with the through hole to complete the second-stage silencing process with the noise frequency change; the air flow coming out of the second function silencing pipe (54d) after the second-stage silencing process is finished expands in the enlarged cavity of the variable cross-section air pipe (54f), passes through a curve, then enters a third function silencing pipe (54d) with the variable length and pipe diameter, passes through the auxiliary silencing pipe (54g), the small arc-shaped narrow opening of the fish scale wedge (54e) and the compression expansion of the wedge (50d) with the through hole to finish the third-stage silencing process, blows out noise reduction from the reduced air opening, and then is indirectly discharged away from the population through the knife-like hole (28a) of the aluminum pipe with more than one meter; at the entrance of the piston pin end of the engine piston, the common chamfer (d18) of the pin hole is not needed, the chamfer (d18) of the pin hole on the drawing of the engine piston is removed, a hole is formed without the chamfer, and two G-shaped elastic pads are directly installed, so that the rejection rate is zero.

has the advantages that:

A riding machine for lawn mowing in garden operation is provided, wherein a balance swivel base (7) is arranged in the middle of a grass collecting box frame (50), and a left grass scale plate (8) and a right grass scale plate (9) form a shunting cone; when the left grass box (5) has more grass and is inclined downwards, the grass enters the right grass box (6) to supply more adding points under the influence of the fact that the acute angles of the door plates of the valves of the shunting cones are deviated to the left and are guided by the right grass scale plate (9); and in the cycle, the balance of the left grass box and the right grass box is automatically adjusted, so that the grass in the two grass boxes is balanced. A flexible suspension screw conveyor (10a) is also arranged to facilitate grass feeding; the engine for the riding machine comprises silica gel shock pads (54a), function muffling pipes (54d), small pipes of auxiliary muffling pipes (54g), fish scale wedges (54e), variable cross-section air pipes (54f) and an exhaust port of an engine cylinder; at the inlet of the piston pin end of the engine piston, a common chamfer angle of a pin hole is not needed, and the energy conservation and emission reduction are facilitated.

Claims

1. The riding machine is used for mowing lawns in garden operation, a grass collecting box frame (50) is arranged at the rear part of a vehicle body (50c), and a grass collecting large pipe (10) is arranged on the vehicle body so as to send mows from a mowing disc to the upper part of the grass collecting box frame (50); a box cover is also arranged above the grass collecting box frame (50); the grass collecting box frame is characterized in that a longitudinal pipe is arranged at the rear part of the vehicle body (50c) along the central axis of the vehicle body and serves as a balance rotating shaft, a balance rotating base (7) is arranged in the middle of the grass collecting box frame (50) and is matched with the balance rotating shaft, frames are arranged on the left side and the right side of the grass collecting box frame (50) so as to be placed in a left grass box (5) and a right grass box (6), a left grass scale plate (8) and a right grass scale plate (9) are arranged on the balance rotating base (7) arranged in the middle of the grass collecting box frame (50), the left grass scale plate (8) and the right grass scale plate (9) are acute angles, the left grass scale plate (8) and the right grass scale plate (9) are symmetrical relative to the balance rotating base (7), and the left grass scale plate (8) and the right grass scale plate (9) form a door plate of a valve of a flow distribution cone; when in balance, the acute angle between the left grass scale plate (8) and the right grass scale plate (9) is just under the grass outlet at the upper end of the grass collecting large pipe (10); when grass is discharged, the cut grass is sent to the upper part of the grass collecting box frame (50) from the cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10), and enters the left grass box (5) and the right grass box (6) under the influence of door plates of flow distribution cones of the left grass scale plate (8) and the right grass scale plate (9); when the grass is divided in an unbalanced way, the grass in the right grass box (6) is more and inclines downwards, the grass cut by the grass cutter is sent to the upper part of the grass collecting box frame (50) from the cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10), and enters the left grass box (5) for adding more points under the influence that the acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are inclined to the right through the guide of the left grass scale plate (8); when the grass is divided and unbalanced, the left grass box (5) has more grass and is inclined downwards, the grass cut by the grass cutter is sent to the upper part of the grass collecting box frame (50) from a grass cutting disc and is discharged through a grass outlet at the upper end of the grass collecting large pipe (10), and enters the right grass box (6) for adding more points under the influence that the acute angles of the door plates of the valves of the shunting cones of the left grass scale plate (8) and the right grass scale plate (9) are deviated to the left and are guided by the right grass scale plate (9); the balance of the left grass box and the right grass box is automatically adjusted in cycles; in order to prevent the grass collecting large pipe (10) from sending grass from the cutting disc to the high double grass boxes and sometimes causing the phenomenon of unsmooth grass leakage under the chassis, a flexible suspension screw feeder (10a) is arranged in the grass collecting large pipe (10), and is driven by a motor (10c) which is arranged above a grass collecting large pipe opening and is provided with a planetary reducer and arranged on the box cover, wherein the flexible suspension screw feeder (10a) is soft and elastic and has spiral corrugated spring steel wires so as to send the grass from the cutting disc to the upper part of the grass collecting box frame (50); the engine for the riding machine comprises silica gel shock pads (54a), functional muffling pipes (54d), small pipes of auxiliary muffling pipes (54g), fish scale wedges (54e) and variable cross-section air pipes (54 f); the exhaust port of the engine cylinder is connected with the catalyst muffler pipe (69), and noise is reduced through the functional muffler pipe (54d), the small pipe of the auxiliary muffler pipe (54g), the fish scale wedge (54e) and the variable cross-section air pipe (54 f); the silica gel shock absorption pad (54a) is arranged at the air outlet direction side of the catalyst-containing muffling pipe (69) connected with the exhaust port of the cylinder body (g44), and the cross-section-variable air pipe (54f) is connected in series; the function silencing pipe (54d) is arranged in the variable cross-section air pipe (54 f); said functional muffler tubes (54d) are spaced apart in series and are axial along a decreasing amplitude curve that approximates the decreasing amplitude of an odd function of a plurality of finite sine wave trains having a period similar to a third octave; the length and the pipe diameter of each silencing pipe combined by the plurality of function silencing pipes (54d) for multi-stage silencing are changed, and the length of each silencing pipe is shortened in a penetrating way and the pipe diameter is gradually reduced when the silencing pipes are seen from front to back, namely in the air outlet direction; the function muffling pipes (54d) are combined into a plurality of fish scale wedges (54e) and wedges (50d) with through holes, wherein each muffling pipe for multi-stage muffling is provided with the fish scale wedges (54 e); the fish scale wedges (54e) are provided with arc-shaped small narrow openings and wedges (50d) with through holes; the function muffler pipe (54d) is also provided with an auxiliary muffler pipe (54g) of an auxiliary side branch; the auxiliary silencing pipe (54g) is a small pipe, and a wedge (50d) with a through hole is arranged on the small pipe; the variable cross-section air pipe (54f) is variable in cross section, and at least three parts of the variable cross-section air pipe are expanded and three parts of the variable cross-section air pipe are reduced; the variable cross-section air pipe (54f) is bent, and at least three parts of the variable cross-section air pipe are provided with bends; the outlet air enters a first function muffling pipe (54d) arranged in the variable cross-section air pipe (54f), and a plurality of small arc narrow openings and wedges (50d) with through holes arranged on the fish scale wedges (54e) arranged on the muffling pipe are compressed and then expanded to complete a first-stage muffling process, and small pipes of auxiliary subsidiary muffling pipes (54g) arranged on the function muffling pipe (54d) provide a plurality of paths for the air flow without being mixed from a main pipe so as to further improve the muffling effect; the variable cross-section air pipe (54f) is variable cross-section, and the airflow flows from the expansion part to the reduction part to assist the compression and expansion; the variable cross-section air pipe (54f) is bent and has a turning function, so that the auxiliary effect of preventing main noise from being directly transmitted is achieved; the airflow coming out of the first function silencing pipe (54d) after the first-stage silencing process is expanded in the enlarged cavity of the variable cross-section air pipe (54f), passes through a curve, then enters the second function silencing pipe (54d) with the variable length and pipe diameter, and is compressed and expanded again through the auxiliary silencing pipe (54g), the small arc-shaped narrow opening of the fish scale wedge (54e) and the wedge (50d) with the through hole to complete the second-stage silencing process with the noise frequency change; the air flow coming out of the second function silencing pipe (54d) after the second-stage silencing process is finished expands in the enlarged cavity of the variable cross-section air pipe (54f), passes through a curve, then enters a third function silencing pipe (54d) with the variable length and pipe diameter, passes through the auxiliary silencing pipe (54g), the small arc-shaped narrow opening of the fish scale wedge (54e) and the compression expansion of the wedge (50d) with the through hole to finish the third-stage silencing process, blows out noise reduction from the reduced air opening, and then is indirectly discharged away from the population through the knife-like hole (28a) of the aluminum pipe with more than one meter; at the entrance of the piston pin end of the engine piston, the common chamfer (d18) of the pin hole is not needed, the chamfer (d18) of the pin hole on the drawing of the engine piston is removed, a hole is formed without the chamfer, and two G-shaped elastic pads are directly installed.