CN109511357B

CN109511357B - A lawn mower for municipal garden engineering

Info

Publication number: CN109511357B
Application number: CN201811356296.5A
Authority: CN
Inventors: 叶澄; 李文新
Original assignee: Hangzhou Fuyang Feishang Decoration Engineering Co ltd
Current assignee: Pingyi Jingfa Industry Development Co.,Ltd.
Priority date: 2017-03-06
Filing date: 2017-03-06
Publication date: 2020-07-31
Anticipated expiration: 2037-03-06
Also published as: CN106888672A; CN109463097B; CN109511357A; CN106888672B; CN109463097A

Abstract

The invention belongs to the technical field of mowers, and particularly relates to a mower for municipal garden engineering, which comprises a hydraulic power mechanism, a rod frame and a mowing mechanism, wherein the hydraulic power mechanism is provided with a fuel engine and a hydraulic pump, the hydraulic power mechanism is arranged at one end of the rod frame, the other end of the rod frame is provided with the mowing mechanism, and the mowing mechanism ensures that people cannot grasp the mower with different variable forces to overcome the reaction force of grass on the mower due to the difficulty of grass cutting when using the mower; in addition, when the grass is difficult to cut, the mowing mechanism automatically controls and adjusts the power of the engine to be completely output to the accelerating flywheel through the differential mechanism, so that the mowing rotating shaft loses power, namely the mower cannot rotate reversely, and only the accelerating flywheel rotates.

Description

A lawn mower for municipal garden engineering

Technical Field

The invention belongs to the technical field of mowers, and particularly relates to a mower for municipal garden engineering.

Background

Portable mowers in the municipal field currently use fuel to directly drive the softer mowing cord to cut grass. Which, because of the use of cutting ropes for cutting, have a limited cutting capacity and are not easily cut for larger and thicker grass. The other type of the lawn mower uses the blade for cutting, the cutting capability of the blade is larger than that of the cutting rope, but when the blade meets grass which is difficult to cut suddenly during cutting, the cutting blade cannot cut the grass instantly, the cut grass generates reaction force on the lawn mower, and if a worker does not hold the blade tightly, the lawn mower can rotate reversely or even be separated from the hand of the worker, so that secondary injury is generated on the worker.

The invention designs a mower for municipal garden engineering to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a mower for municipal garden engineering, which is realized by adopting the following technical scheme.

The utility model provides a lawn mower for municipal garden engineering which characterized in that: the lawn mower comprises a hydraulic power mechanism, a rod frame and a mowing mechanism, wherein the hydraulic power mechanism is provided with a fuel engine and a hydraulic pump, the hydraulic power mechanism is arranged at one end of the rod frame, and the mowing mechanism is arranged at the other end of the rod frame.

The mowing mechanism is cylindrical and is provided with a circular ring shell.

The mowing mechanism comprises a mowing frame rod, a triggering block, an accelerating flywheel, a flywheel rotating shaft support, a flywheel rotating shaft, a second differential mechanism, a controllable clutch, a rotary support, a first differential mechanism, a mowing rotating shaft, a hydraulic motor, a triggering arc plate, a fixed bottom plate, a first supporting plate, a second left shaft, a second right shaft, a limiting strip, a second supporting plate, a first rotating shaft, a third supporting plate, a guide strip, a fourth supporting plate, a volute spring, a fifth supporting plate, a hydraulic motor bottom plate, a hydraulic motor support, a sixth supporting plate, a second rotating shaft, a seventh supporting plate, a third rotating shaft, an eighth supporting plate, a hydraulic motor rotating shaft, a first main shaft, a guide ring groove, a rotary guide ring, a mowing rotating shaft guide groove, a triggering inclined plane, a mowing rotating shaft guide ring, a limiting block, a limiting triggering block, a limiting sliding sleeve, a limiting hole, a mowing blade and a fourth rotating shaft, wherein the fixed bottom plate is arranged on the lower side of, a mowing rotating shaft guide groove is formed in a round hole in the middle of the fixed bottom plate, a guide ring groove is formed in the end face of the upper side of the fixed bottom plate, and the arc-shaped trigger block is provided with a trigger inclined plane and is installed on the upper side of the fixed bottom plate and close to the outer edge face of the fixed bottom plate; a mowing rotating shaft guide ring is arranged on the mowing rotating shaft, the mowing rotating shaft is matched with a mowing rotating shaft guide groove through the mowing rotating shaft guide ring and is arranged in a fixed bottom plate, two mowing frame rods are symmetrically arranged at the bottom end of the mowing rotating shaft, a mowing blade is arranged at the top end of each mowing frame rod, and the height of a frame body of each mowing frame rod, close to the connecting part of the mowing rotating shaft, away from the ground is larger than the distance between the mowing blade and the ground; the rotary support is a circular plate, the lower side of the rotary support is provided with a rotary guide ring, and the rotary support is arranged on the fixed bottom plate through the matching of the rotary guide ring and the guide ring groove; the hydraulic motor bottom plate is arranged on the outer edge surface of the rotary support; the volute spiral spring is arranged in the inner ring of the rotary support, the outer end of the volute spiral spring is arranged on the inner ring surface of the rotary support, and the inner end of the volute spiral spring is arranged on the fixed bottom plate; the hydraulic motor is supported and installed on a hydraulic motor bottom plate through the hydraulic motor; the hydraulic motor support device comprises a rotary support, a seventh support plate, an eighth support plate, a fifth support plate, a third support plate, a hydraulic motor support, a hydraulic motor; one end of the fourth supporting plate is arranged on the side surface of the fifth supporting plate, and the other end of the fourth supporting plate is arranged on the side surface of the third supporting plate; the bottom end of the first supporting plate is arranged on the fourth supporting plate and is vertical to the fourth supporting plate, one end of the second supporting plate is fixed at the top end of the third supporting plate, and the other end of the second supporting plate is arranged on the side surface of the first supporting plate; the first main shaft is arranged on the lower side of the fifth supporting plate, the fourth rotating shaft is arranged on the fourth supporting plate, the first main shaft is connected with the mowing rotating shaft and the fourth rotating shaft through a first differential mechanism, and the mowing rotating shaft and the fourth rotating shaft are two differential shafts of the first differential mechanism; the second rotating shaft is arranged on the sixth supporting plate and is in matched transmission with the first main shaft through bevel teeth; the hydraulic motor rotating shaft is arranged on the seventh supporting plate, the third rotating shaft is arranged on the eighth supporting plate, and the hydraulic motor rotating shaft is meshed with the second rotating shaft and the third rotating shaft through bevel gear matching; the second left shaft is arranged on the upper side of the fifth supporting plate, and the third rotating shaft is connected with the second left shaft through a controllable clutch; the second right shaft is arranged on the upper side of the first supporting plate; the flywheel rotating shaft support is arranged on the inner edge surface of the upper side of the circular ring shell, the flywheel rotating shaft is arranged on the flywheel rotating shaft support, and the accelerating flywheel is arranged at the upper end of the flywheel rotating shaft; the flywheel rotating shaft is connected with a second right shaft and a second left shaft through a second differential mechanism, and the second left shaft and the second right shaft are two differential shafts of the second differential mechanism; the limiting shaft is arranged on the second supporting plate, the first rotating shaft is arranged on the first supporting plate, one end of the limiting shaft is matched with the second right shaft through bevel teeth, and the other end of the limiting shaft is matched with the first rotating shaft through bevel teeth; one end of the first rotating shaft is matched with the limiting shaft through the bevel gear, and the other end of the first rotating shaft is matched with the fourth rotating shaft through the bevel gear; the limiting sliding sleeve is arranged on the first supporting plate, two limiting triggering blocks are symmetrically arranged on two sides of the limiting block, each limiting triggering block is arranged on two sides of the top end of the triggering arc plate through a limiting strip, a limiting hole is formed in a limiting shaft, one end of the limiting block slides in the limiting hole, and the other end of the limiting block slides in the limiting sliding sleeve; one end of the guide bar is arranged on the trigger arc plate, and the other end of the guide bar penetrates through a square hole in the third supporting plate; the lower end of the trigger arc plate and the fixed bottom plate have a gap lower than the height of the trigger block.

The hydraulic pump in the hydraulic power mechanism is connected with the hydraulic motor through a hydraulic pipe.

As a further improvement of the technology, the bottom end of the mowing rotating shaft is provided with an annular supporting bottom pillar clamping groove, the upper side of the supporting bottom pillar is provided with a circular groove, the bottom end of the circular groove is provided with an annular supporting bottom pillar guide ring, and the supporting bottom pillar is arranged at the bottom end of the mowing rotating shaft through the matching of the supporting bottom pillar guide ring and the supporting bottom pillar clamping groove.

As a further improvement of the technology, two friction blocks are symmetrically arranged on two sides of the lower end of the mowing rack rod and positioned between the two mowing blades.

As a further improvement of the technology, the inner end of the scroll spring is arranged on the fixed bottom plate through a spring fixing block.

Compared with the traditional mower technology, the fuel engine in the hydraulic power mechanism is used for driving the hydraulic pump, and the hydraulic motor in the mowing mechanism is driven through the hydraulic pipe so as to drive the mowing blade to rotationally mow. The design of the mowing mechanism plays a role in protecting the power driving mechanism after the mowing blade is clamped when cutting tall grass on one hand, and plays a role in increasing the resistance force resisting the reaction force of the mowing blade by accelerating the rotation acceleration of the flywheel on the other hand, so that the mowing blade on the mowing frame rod cuts and removes the tall grass on the ground; the maximum torque of the mowing blade to cut tall grass, with the hydraulic motor power allowed, is determined by its own weight and the strength of the worker, and it is desirable for the user that the mower be lighter as better, lighter as easier to carry for long periods of time; however, when the lawn mower is light, a person is required to tightly hold the lawn mower to provide a large resistance, and the larger the force applied by a worker, the shorter the time for the worker to work with the lawn mower. When high grass which is difficult to cut is encountered, a worker cannot provide force equal to the counterforce of the mower due to insufficient strength of the worker, the mower can be integrally reversed, and the mower generates certain collision damage to the operator, so that the accelerating flywheel is designed in the invention, and the anti-torque effect of the mower is increased by using the accelerating force provided by the accelerating rotation of the flywheel. When the reaction force generated by the high grass is larger than the force of a worker, and the whole mower cannot provide the reaction force capable of resisting the grass to the mower under the combined action of the resisting torque generated by the accelerating force of the flywheel and the force of the worker, the whole mower can be reversed. In order to solve the problem, the power of the hydraulic motor is completely output to the accelerating flywheel through automatic control and adjustment of the differential mechanism, so that the mowing rotating shaft loses power, namely the mower cannot rotate reversely, and only the accelerating flywheel rotates.

According to the mowing mechanism, the first main shaft is connected with the fourth rotating shaft and the mowing rotating shaft through the first differential mechanism, the first differential mechanism can ensure that power transmitted by the first main shaft is distributed according to the resistance of the fourth rotating shaft and the mowing rotating shaft, the smaller the resistance is, the larger the distributed power is, namely when any one of the fourth rotating shaft and the mowing rotating shaft is stuck, the power of the first main shaft can be only transmitted to the rotating shaft which is not stuck; the second left shaft and the second right shaft are connected with the flywheel rotating shaft through a second differential mechanism, and the second differential mechanism is designed to ensure that the power of the second left shaft and the power of the second right shaft can be transmitted to the flywheel rotating shaft, and when any one of the second left shaft and the second right shaft is blocked, the rotating shaft which is not blocked can transmit the power to the flywheel rotating shaft; the third rotating shaft is connected with the second left shaft through a controllable clutch, and the controllable clutch is designed in such a way that the third rotating shaft and the second left shaft can be communicated and transmitted when the mowing mechanism meets certain conditions; the trigger arc plate slides on the third support plate in the radial direction through the guide strip, the trigger arc plate can contact with the trigger inclined plane on the trigger block along with the rotation of the rotary support, and the trigger arc plate moves towards the third support plate under the guide effect of the trigger inclined plane. The limiting block can slide in the limiting sliding sleeve and the limiting hole during sliding, and the limiting shaft can be limited by the sliding of the limiting block; when the limiting block is inserted into the limiting hole, the limiting shaft can be limited to rotate; the trigger arc plate controls the motion of the limiting block through the transmission of the limiting strip and the limiting trigger block, and further controls whether the limiting shaft is limited or not. The two sides of the mowing frame rod of the mowing mechanism are also provided with friction blocks, and the friction blocks are in friction contact with the ground in the rotating process of the mowing frame rod, so that a certain gap is kept between the mowing blade and the ground, and the ground is prevented from being scratched by the mowing blade in the rotating process. The hack lever of mowing is installed in the pivot of mowing, and the pivot downside of mowing has the support base pillar, and the cooperation that supports the base pillar through supporting the guide ring of base pillar and supporting the base pillar draw-in groove can rotate round the pivot of mowing, and pivoted aim at hack lever rotatory in-process on the one hand, rotatory pivot of mowing and static ground pass through the transition of supporting the base pillar, and on the other hand and clutch blocks play the effect of guaranteeing to mow blade and ground and keep certain clearance jointly.

The cutting protrusion of the grass cutting mechanism is implemented as follows: the rotary support can rotate on the fixed bottom plate, and the scroll spring is compressed during rotation, and meanwhile, the hydraulic motor, various rotating shafts and the support are driven to rotate together. When grass is easy to cut off, the trigger arc plate is positioned at a position far away from the outer edge surface of the rotary support, the limiting block is clamped in the limiting hole at the moment, the limiting shaft is limited to rotate, and the rotation of the second right shaft and the first rotating shaft is limited by the limited-rotation limiting shaft through the engagement of the conical teeth between the limited-rotation limiting shaft and the rotating shaft; the controllable clutch keeps the separation of the second left shaft and the third rotating shaft, and the hydraulic motor can only transmit power to the mowing rotating shaft through the second rotating shaft and the first main shaft. When the mowing blade driven by the hydraulic motor collides with grass for cutting, the grass has reaction force on the mowing blade, the reaction force is transmitted to the hydraulic motor through the mowing rotating shaft and then drives the rotary support to rotate, the volute spiral spring is compressed, the reaction force of the grass which is easy to clear is small, the volute spiral spring can be larger than the reaction force after being compressed by a small angle, and at the moment, a worker can use small force to be larger than the restoring force of the volute spiral spring, so that the grass which is easy to cut can be smoothly cut by the mowing blade. When grass is difficult to be cut, the mowing blade can receive great reaction force, volute spiral spring is compressed by a great angle at the moment, when the restoring force of the volute spiral spring compressed is close to the critical force generated by the fatigue of general workers, the rotary support rotates to a certain set angle, the angle can excite the engagement of the controllable clutch on the third rotating shaft and the second left shaft, the second left shaft is connected with the hydraulic motor through the second differential mechanism to drive the flywheel to rotate, after the reaction force generated by the rotation of the flywheel offsets the reaction force of the mowing blade, the workers can easily hold the rod frame to cut grass by using small force. When the grass is extremely difficult to cut and the flywheel acting force cannot counteract the counterforce of the mowing blade, the spiral spring is compressed by a larger angle, the trigger block triggers the trigger arc plate to move, so that the limiting block is withdrawn from the limiting hole, the limiting shaft is restored to rotate, the mowing rotating shaft is limited to rotate by grass at the moment, the hydraulic motor transmits the power of the mowing blade to the flywheel through the first rotating shaft, the limiting shaft and the second left shaft through the first differential mechanism, the flywheel rotates at a high speed under the transmission of the second left shaft and the second right shaft, the mower stays in the original place and does not rotate reversely, so that people can not use the mower again to grasp the mower with different variable forces to overcome the reaction force of grass on the mower due to the difficulty of grass cutting.

Drawings

Fig. 1 is a schematic view of a lawn mower.

Fig. 2 is a schematic structural view of the mowing mechanism.

Fig. 3 is a side view of the structure of the mowing mechanism.

Fig. 4 is a schematic view of the rotational support mounting.

Fig. 5 is a schematic diagram of trigger block installation.

Fig. 6 is a related structure schematic diagram of the mower rack rod.

Fig. 7 is a schematic view of a mounting structure of a limiting block.

Fig. 8 is a schematic view of a support base pillar structure.

Fig. 9 is a schematic view of a defining axis structure.

Fig. 10 is a schematic view of the trigger arc plate and trigger block.

Number designation in the figures: 2. hydraulic power mechanism, 3, rod frame, 4, mowing mechanism, 5, mowing frame rod, 9, trigger block, 12, accelerating flywheel, 13, flywheel rotating shaft support, 14, flywheel rotating shaft, 15, second differential mechanism, 16, controllable clutch, 20, rotary support, 21, first differential mechanism, 22, mowing rotating shaft, 23, hydraulic motor, 25, trigger arc plate, 26, fixed bottom plate, 36, first support plate, 37, second left shaft, 38, second right shaft, 39, limiting shaft, 40, limiting bar, 41, second support plate, 42, first rotating shaft, 43, third support plate, 44, guide bar, 45, fourth support plate, 46, volute spring, 47, fifth support plate, 48, hydraulic motor bottom plate, 49, hydraulic motor support, 50, sixth support plate, 51, second rotating shaft, 52, seventh support plate, 53, third rotating shaft, 54, eighth support plate, 55, The mowing machine comprises a hydraulic motor rotating shaft, a hydraulic motor rotating shaft 56, a supporting bottom column 57, a first main shaft 58, a guide ring groove 59, a rotary guide ring 60, a spring fixing block 61, a mowing rotating shaft guide groove 62, a triggering inclined plane 63, a mowing rotating shaft guide ring 64, a supporting bottom column clamping groove 65, a friction block 66, a mowing blade 67, a limiting block 68, a limiting triggering block 69, a limiting sliding sleeve 70, a supporting bottom column guide ring 71, a limiting hole 72 and a fourth rotating shaft.

Detailed Description

As shown in fig. 1, the lawn mower comprises a hydraulic power mechanism 2, a rod frame 3 and a mowing mechanism 4, wherein the hydraulic power mechanism 2 is provided with a fuel engine and a hydraulic pump, the hydraulic power mechanism 2 is arranged at one end of the rod frame 3, and the mowing mechanism 4 is arranged at the other end of the rod frame 3.

The mowing mechanism 4 is cylindrical and has an annular housing.

As shown in fig. 2 and 3, the mowing mechanism 4 includes a mowing frame lever 5, a trigger block 9, an accelerating flywheel 12, a flywheel rotating shaft 14 support 13, a flywheel rotating shaft 14, a second differential 15, a controllable clutch 16, a rotary support 20, a first differential 21, a mowing rotating shaft 22, a hydraulic motor 23, a trigger arc plate 25, a fixed base plate 26, a first support plate 36, a second left shaft 37, a second right shaft 38, a limiting shaft 39, a limiting bar 40, a second support plate 41, a first rotating shaft 42, a third support plate 43, a guide bar 44, a fourth support plate 45, a volute spring 46, a fifth support plate 47, a hydraulic motor base plate 48, a hydraulic motor support 49, a sixth support plate 50, a second rotating shaft 51, a seventh support plate 52, a third rotating shaft 53, an eighth support plate 54, a hydraulic motor rotating shaft 55, a first main shaft 57, a guide ring groove 58, a rotary guide ring 59, a mowing rotating shaft guide groove 61, a trigger inclined surface 62, a mowing rotating shaft guide ring 63, a limiting block 67, a limiting trigger block 68, a limiting sliding sleeve 69, a limiting hole 71, a mowing blade 66 and a fourth rotating shaft 72, wherein the fixed bottom plate 26 is arranged at the lower side of the inner edge surface of the circular ring shell of the mowing mechanism 4, as shown in fig. 5, a mowing rotating shaft guide groove 61 is arranged in a middle circular hole of the fixed bottom plate 26, a guide ring groove 58 is arranged on the upper side end surface of the fixed bottom plate 26, and the arc-shaped trigger block 9 is provided with a trigger inclined surface 62, is arranged at the upper side of the fixed bottom plate 26 and is close to the outer edge; as shown in fig. 6, a mowing rotating shaft guide ring 63 is installed on the mowing rotating shaft 22, the mowing rotating shaft 22 is installed in the fixed base plate 26 in a matching manner with the mowing rotating shaft guide groove 61 through the mowing rotating shaft guide ring 63, two mowing rack rods 5 are symmetrically installed at the bottom end of the mowing rotating shaft 22, a mowing blade 66 is installed at the top end of each mowing rack rod 5, and the height of a rack body of the mowing rack rod 5 close to the connection part of the mowing rotating shaft 22 from the ground is larger than the distance between the mowing blade 66 and the; as shown in fig. 4, the rotary support 20 is a circular plate, and a rotary guide ring 59 is mounted on the lower side of the rotary support 20, and the rotary support 20 is mounted on the fixed base plate 26 through the rotary guide ring 59 and the guide ring groove 58; as shown in fig. 2 and 3, a hydraulic motor base plate 48 is mounted on the outer peripheral surface of the rotary support 20; as shown in fig. 2 and 4, the spiral spring 46 is installed in the inner ring of the rotary support 20, and the outer end of the spiral spring 46 is installed on the inner ring surface of the rotary support 20 and the inner end is installed on the fixed bottom plate 26; as shown in fig. 2 and 3, the hydraulic motor 23 is mounted on a hydraulic motor base plate 48 via a hydraulic motor support 49; the seventh supporting plate 52 is installed on the upper side of the rotating support 20 and is close to the hydraulic motor support 49, one end of the sixth supporting plate 50 is fixed on the side surface of the seventh supporting plate 52 and is vertical to the seventh supporting plate 52, one end of the eighth supporting plate 54 is fixed on the top end of the seventh supporting plate 52 and is vertical to the seventh supporting plate 52, one ends of the sixth supporting plate 50 and the eighth supporting plate 54 on the same side are jointly provided with the fifth supporting plate 47, the fifth supporting plate 47 is parallel to the seventh supporting plate 52, and the third supporting plates 43 are installed on the rotating support 20 and are symmetrically distributed with the seventh supporting plate 52; one end of the fourth support plate 45 is mounted on the side of the fifth support plate 47, and the other end is mounted on the side of the third support plate 43; the bottom end of the first supporting plate 36 is arranged on the fourth supporting plate 45 and is vertical to the fourth supporting plate 45, one end of the second supporting plate 41 is fixed at the top end of the third supporting plate 43, and the other end is arranged on the side surface of the first supporting plate 36; the first main shaft 57 is mounted on the lower side of the fifth supporting plate 47, the fourth rotating shaft 72 is mounted on the fourth supporting plate 45, the first main shaft 57 is connected with the mowing rotating shaft 22 and the fourth rotating shaft 72 through the first differential 21, and the mowing rotating shaft 22 and the fourth rotating shaft 72 are two differential shafts of the first differential 21; the second rotating shaft 51 is arranged on the sixth supporting plate 50, and the second rotating shaft 51 is in fit transmission with the first main shaft 57 through bevel teeth; a hydraulic motor rotating shaft 55 is arranged on the seventh supporting plate 52, a third rotating shaft 53 is arranged on the eighth supporting plate 54, and the hydraulic motor rotating shaft 55 is meshed with the second rotating shaft 51 and the third rotating shaft 53 through taper gear matching; the second left shaft 37 is arranged on the upper side of the fifth supporting plate 47, and the third rotating shaft 53 is connected with the second left shaft 37 through the controllable clutch 16; the second right shaft 38 is mounted on the upper side of the first support plate 36; a flywheel rotating shaft 14 support 13 is arranged on the inner edge surface of the upper side of the circular ring shell, a flywheel rotating shaft 14 is arranged on the flywheel rotating shaft 14 support 13, and an accelerating flywheel 12 is arranged at the upper end of the flywheel rotating shaft 14; the flywheel rotating shaft 14 is connected with a second right shaft 38 and a second left shaft 37 through a second differential 15, and the second left shaft 37 and the second right shaft 38 are two differential shafts of the second differential 15; the limiting shaft 39 is arranged on the second supporting plate 41, the first rotating shaft 42 is arranged on the first supporting plate 36, one end of the limiting shaft 39 is matched with the second right shaft 38 through bevel teeth, and the other end of the limiting shaft 39 is matched with the first rotating shaft 42 through bevel teeth; one end of the first rotating shaft 42 is matched with the limiting shaft through bevel teeth, and the other end of the first rotating shaft 42 is matched with the fourth rotating shaft 72 through bevel teeth; as shown in fig. 2 and 7, the limiting sliding sleeve 69 is mounted on the first supporting plate 36, two limiting triggering blocks 68 are symmetrically mounted on two sides of the limiting block 67, each limiting triggering block 68 is mounted on two sides of the top end of the triggering arc plate 25 through a limiting strip 40, as shown in fig. 9, a limiting hole 71 is formed on the limiting shaft 39, one end of the limiting block 67 slides in the limiting hole 71, and the other end slides in the limiting sliding sleeve 69; one end of the guide bar 44 is mounted on the trigger arc plate 25, and the other end passes through a square hole on the third support plate 43; the lower end of the trigger arc plate 25 and the fixed bottom plate 26 have a clearance lower than the height of the trigger block 9.

The hydraulic pump in the hydraulic power mechanism 2 is connected to the hydraulic motor 23 through a hydraulic pipe.

As shown in fig. 8, the mowing rotating shaft 22 has an annular supporting bottom pillar engaging groove 64 formed at the bottom end thereof, the supporting bottom pillar 56 has a circular groove formed at the upper side thereof, an annular supporting bottom pillar guide ring 70 is mounted at the bottom end of the circular groove, and the supporting bottom pillar 56 is mounted at the bottom end of the mowing rotating shaft 22 by the engagement of the supporting bottom pillar guide ring 70 and the supporting bottom pillar engaging groove 64.

As shown in fig. 6, two friction blocks 65 are symmetrically installed on both sides of the lower end of the mower rack bar 5, and the two friction blocks 65 are located between two mowing blades 66.

As shown in fig. 4, the inner end of the spiral spring 46 is mounted on the fixed base plate 26 through a spring fixing block 60.

In summary, the fuel engine in the hydraulic power mechanism 2 is used to drive the hydraulic pump, and the hydraulic motor 23 in the mowing mechanism 4 is driven through the hydraulic pipe to drive the mowing blade 66 to rotationally mow. The design of the mowing mechanism 4 in the invention plays a role in protecting the power driving mechanism after the mowing blade 66 is clamped when cutting tall grass on one hand, and plays a role in increasing the resistance force resisting the reaction force of the mowing blade 66 by accelerating the rotation acceleration of the flywheel 12 on the other hand, so that the mowing blade 66 on the mowing frame rod 5 can cut and remove the tall grass on the ground; the maximum torque of the mowing blade 66 to cut tall grass, with the power of the hydraulic motor 23 allowed, is determined by its own weight and the strength of the worker, and it is desirable for the user that the mower be lighter as better, lighter as easier to carry for a long time; however, when the lawn mower is light, a person is required to tightly hold the lawn mower to provide a large resistance, and the larger the force applied by a worker, the shorter the time for the worker to work with the lawn mower. When high grass which is difficult to cut is encountered, a worker cannot provide force equal to the counterforce of the mower due to insufficient strength of the worker, the mower can be integrally reversed, and the mower generates certain collision injury to the operator, so that the accelerating flywheel 12 is designed in the invention, and the anti-torque effect of the mower is increased by using the accelerating force provided by the accelerating rotation of the flywheel. When the reaction force generated by the high grass is larger than the force of a worker, and the whole mower cannot provide the reaction force capable of resisting the grass to the mower under the combined action of the resisting torque generated by the accelerating force of the flywheel and the force of the worker, the whole mower can be reversed. In order to solve the problem, the invention automatically controls and adjusts the differential mechanism to output the power of the hydraulic motor 23 to the accelerating flywheel 12, so that the mowing rotating shaft 22 loses power, namely the mower cannot rotate reversely, and only the accelerating flywheel 12 rotates.

According to the invention, the first main shaft 57 in the mowing mechanism 4 is connected with the fourth rotating shaft 72 and the mowing rotating shaft 22 through the first differential 21, the first differential 21 can ensure that the power transmitted by the first main shaft 57 is distributed with power according to the resistance of the fourth rotating shaft 72 and the mowing rotating shaft 22, the smaller the resistance is, the larger the distributed power is, namely when any one of the fourth rotating shaft 72 and the mowing rotating shaft 22 is stuck, the power of the first main shaft 57 can be transmitted to the rotating shaft which is not stuck; the second left shaft 37 and the second right shaft 38 are connected with the flywheel rotating shaft 14 through the second differential 15, and the second differential 15 is designed to enable the power of the second left shaft 37 and the power of the second right shaft 38 to be transmitted to the flywheel rotating shaft 14, and when any one of the second left shaft 37 and the second right shaft 38 is clamped, the rotating shaft which is not clamped can transmit the power to the flywheel rotating shaft 14; the third rotating shaft 53 is connected with the second left shaft 37 through the controllable clutch 16, and the controllable clutch 16 is designed in such a way that the third rotating shaft 53 and the second left shaft 37 are communicated and transmitted when the mowing mechanism 4 meets certain conditions; the trigger arc plate 25 slides radially on the third support plate 43 through the guide bar 44, and the trigger arc plate 25 will contact with the trigger inclined plane 62 on the trigger block 9 along with the rotation of the rotating support 20, as shown in fig. 10, the trigger arc plate 25 moves towards the third support plate 43 under the guiding action of the trigger inclined plane 62. The control limiting block 67 can slide in the limiting sliding sleeve 69 and the limiting hole 71 in the sliding process, and the limiting shaft can be limited by the sliding of the limiting block 67; when the limiting block 67 is inserted into the limiting hole 71, the limiting shaft is limited to rotate; the trigger arc plate 25 controls the motion of the limiting block 67 through the transmission of the limiting strip 40 and the limiting trigger block 68, and further controls whether the limiting shaft is limited or not. The friction blocks 65 are further arranged on two sides of the mowing rack rod 5 of the mowing mechanism 4, and the friction blocks 65 are in friction contact with the ground in the rotating process of the mowing rack rod 5, so that a certain gap is kept between the mowing blade 66 and the ground, and the mowing blade 66 is prevented from scratching the ground in the rotating process. The mowing mechanism comprises a mowing mechanism rod 5, a supporting bottom pillar 56, a supporting bottom pillar guide ring 70, a supporting bottom pillar clamping groove 64 and a mowing blade 66, wherein the mowing mechanism rod 5 is mounted on the mowing rotating shaft 22, the supporting bottom pillar 56 is arranged on the lower side of the mowing rotating shaft 22, the supporting bottom pillar 56 can rotate around the mowing rotating shaft 22 through the matching of the supporting bottom pillar guide ring 70 and the supporting bottom pillar clamping groove 64, the rotation aims to ensure that the rotary mowing rotating shaft 22 and the static ground are transited through the supporting bottom pillar 56 in the rotation process of the mowing mechanism rod 5, and the supporting bottom pillar guide.

The cutting projections of the mowing mechanism 4 are implemented as follows: the rotating support 20 is rotatable on the fixed base plate 26, which compresses the spiral spring 46 and rotates the hydraulic motor 23, the various shafts and the support. When grass is easy to cut off, the trigger arc plate 25 is positioned far away from the outer edge surface of the rotating support 20, the limiting block 67 is clamped in the limiting hole 71, the limiting shaft is limited to rotate, and the rotation of the second right shaft 38 and the first rotating shaft 42 is limited by the limited-rotation limiting shaft through the conical tooth meshing with the rotating shaft; the controllable clutch 16 keeps the second left shaft 37 and the third shaft 53 separated, and the hydraulic motor 23 can only transmit power to the mowing shaft 22 through the second shaft 51 and the first main shaft 57. When the grass cutting blade 66 driven by the hydraulic motor 23 collides with grass to cut, the grass has a reaction force to the grass cutting blade 66, the reaction force is transmitted to the hydraulic motor 23 through the grass cutting rotating shaft 22 and then drives the rotating support 20 to rotate, the spiral spring 46 is compressed, the reaction force of the grass which is easy to remove is small, the spiral spring 46 can be larger than the reaction force after being compressed by a small angle, and at the moment, the worker can use a small force to be larger than the restoring force of the spiral spring 46, so that the grass which is easy to cut can be smoothly cut by the grass cutting blade 66. When grass is difficult to cut, the mowing blade 66 can be subjected to large reaction force, the volute spiral spring 46 is compressed by a large angle, when the restoring force of the compressed volute spiral spring 46 is close to the critical force generated by the fatigue of general workers, the rotary support 20 rotates to a certain set angle, the angle can excite the controllable clutch 16 to mesh the third rotating shaft 53 and the second left shaft 37, the second left shaft 37 is communicated with the hydraulic motor 23 through the second differential mechanism 15 to drive the flywheel to rotate, and after the reaction force generated by the rotation of the flywheel offsets the reaction force of the mowing blade 66, the workers can easily hold the rod frame 3 to cut the grass by using small force. When the grass is difficult to cut and the flywheel acting force cannot counteract the reaction force of the mowing blade 66, the volute spiral spring 46 can be compressed by a larger angle, the trigger block 9 can trigger the trigger arc plate 25 to move, so that the limit block 67 withdraws from the limit hole 71, the limit shaft restores to rotate, the mowing rotating shaft 22 is limited by the grass to rotate, the hydraulic motor 23 transmits the power of the mowing blade 66 to the flywheel through the first rotating shaft 42, the limit shaft and the second left shaft 37 through the first differential 21, the flywheel rotates at a high speed under the transmission of the second left shaft 37 and the second right shaft 38, the mower stays in the original place and does not rotate reversely, so that people can not grasp the mower with different variable forces to overcome the reaction force of the grass on the mower due to the difficulty of grass cutting when using the mower again, the mower and the mower are easy to operate and can prevent the mower from damaging people reversely rotating, has beneficial use effect.

Claims

1. The utility model provides a lawn mower for municipal garden engineering which characterized in that: the lawn mower comprises a hydraulic power mechanism, a rod frame and a mowing mechanism, wherein the hydraulic power mechanism is provided with a fuel engine and a hydraulic pump, the hydraulic power mechanism is arranged at one end of the rod frame, and the mowing mechanism is arranged at the other end of the rod frame;

the mowing mechanism is cylindrical and is provided with a circular ring shell;

the mowing mechanism comprises a mowing frame rod, a triggering block, an accelerating flywheel, a flywheel rotating shaft support, a flywheel rotating shaft, a second differential mechanism, a controllable clutch, a rotary support, a first differential mechanism, a mowing rotating shaft, a hydraulic motor, a triggering arc plate, a fixed bottom plate, a first supporting plate, a second left shaft, a second right shaft, a limiting strip, a second supporting plate, a first rotating shaft, a third supporting plate, a guide strip, a fourth supporting plate, a volute spring, a fifth supporting plate, a hydraulic motor bottom plate, a hydraulic motor support, a sixth supporting plate, a second rotating shaft, a seventh supporting plate, a third rotating shaft, an eighth supporting plate, a hydraulic motor rotating shaft, a first main shaft, a guide ring groove, a rotary guide ring, a mowing rotating shaft guide groove, a triggering inclined plane, a mowing rotating shaft guide ring, a limiting block, a limiting triggering block, a limiting sliding sleeve, a limiting hole, a mowing blade and a fourth rotating shaft, wherein the fixed bottom plate is arranged on the lower side of, a mowing rotating shaft guide groove is formed in a round hole in the middle of the fixed bottom plate, a guide ring groove is formed in the end face of the upper side of the fixed bottom plate, and the arc-shaped trigger block is provided with a trigger inclined plane and is installed on the upper side of the fixed bottom plate and close to the outer edge face of the fixed bottom plate; a mowing rotating shaft guide ring is arranged on the mowing rotating shaft, the mowing rotating shaft is matched with a mowing rotating shaft guide groove through the mowing rotating shaft guide ring and is arranged in a fixed bottom plate, two mowing frame rods are symmetrically arranged at the bottom end of the mowing rotating shaft, a mowing blade is arranged at the top end of each mowing frame rod, and the height of a frame body of each mowing frame rod, close to the connecting part of the mowing rotating shaft, away from the ground is larger than the distance between the mowing blade and the ground; the rotary support is a circular plate, the lower side of the rotary support is provided with a rotary guide ring, and the rotary support is arranged on the fixed bottom plate through the matching of the rotary guide ring and the guide ring groove; the hydraulic motor bottom plate is arranged on the outer edge surface of the rotary support; the volute spiral spring is arranged in the inner ring of the rotary support, the outer end of the volute spiral spring is arranged on the inner ring surface of the rotary support, and the inner end of the volute spiral spring is arranged on the fixed bottom plate; the hydraulic motor is supported and installed on a hydraulic motor bottom plate through the hydraulic motor; the hydraulic motor support device comprises a rotary support, a seventh support plate, an eighth support plate, a fifth support plate, a third support plate, a hydraulic motor support, a hydraulic motor; one end of the fourth supporting plate is arranged on the side surface of the fifth supporting plate, and the other end of the fourth supporting plate is arranged on the side surface of the third supporting plate; the bottom end of the first supporting plate is arranged on the fourth supporting plate and is vertical to the fourth supporting plate, one end of the second supporting plate is fixed at the top end of the third supporting plate, and the other end of the second supporting plate is arranged on the side surface of the first supporting plate; the first main shaft is arranged on the lower side of the fifth supporting plate, the fourth rotating shaft is arranged on the fourth supporting plate, the first main shaft is connected with the mowing rotating shaft and the fourth rotating shaft through a first differential mechanism, and the mowing rotating shaft and the fourth rotating shaft are two differential shafts of the first differential mechanism; the second rotating shaft is arranged on the sixth supporting plate and is in matched transmission with the first main shaft through bevel teeth; the hydraulic motor rotating shaft is arranged on the seventh supporting plate, the third rotating shaft is arranged on the eighth supporting plate, and the hydraulic motor rotating shaft is meshed with the second rotating shaft and the third rotating shaft through bevel gear matching; the second left shaft is arranged on the upper side of the fifth supporting plate, and the third rotating shaft is connected with the second left shaft through a controllable clutch; the second right shaft is arranged on the upper side of the first supporting plate; the flywheel rotating shaft support is arranged on the inner edge surface of the upper side of the circular ring shell, the flywheel rotating shaft is arranged on the flywheel rotating shaft support, and the accelerating flywheel is arranged at the upper end of the flywheel rotating shaft; the flywheel rotating shaft is connected with a second right shaft and a second left shaft through a second differential mechanism, and the second left shaft and the second right shaft are two differential shafts of the second differential mechanism; the limiting shaft is arranged on the second supporting plate, the first rotating shaft is arranged on the first supporting plate, one end of the limiting shaft is matched with the second right shaft through bevel teeth, and the other end of the limiting shaft is matched with the first rotating shaft through bevel teeth; one end of the first rotating shaft is matched with the limiting shaft through the bevel gear, and the other end of the first rotating shaft is matched with the fourth rotating shaft through the bevel gear; the limiting sliding sleeve is arranged on the first supporting plate, two limiting triggering blocks are symmetrically arranged on two sides of the limiting block, each limiting triggering block is arranged on two sides of the top end of the triggering arc plate through a limiting strip, a limiting hole is formed in a limiting shaft, one end of the limiting block slides in the limiting hole, and the other end of the limiting block slides in the limiting sliding sleeve; one end of the guide bar is arranged on the trigger arc plate, and the other end of the guide bar penetrates through a square hole in the third supporting plate; the lower end of the trigger arc plate and the fixed bottom plate have a gap lower than the height of the trigger block;

the hydraulic pump in the hydraulic power mechanism is connected with the hydraulic motor through a hydraulic pipe;

the bottom end of the mowing rotating shaft is provided with an annular supporting bottom pillar clamping groove, the upper side of the supporting bottom pillar is provided with a circular groove, the bottom end of the circular groove is provided with an annular supporting bottom pillar guide ring, and the supporting bottom pillar is arranged at the bottom end of the mowing rotating shaft through the matching of the supporting bottom pillar guide ring and the supporting bottom pillar clamping groove;

the inner end of the volute spiral spring is arranged on the fixed bottom plate through a spring fixing block.