CN111887001A

CN111887001A - Grass cutter

Info

Publication number: CN111887001A
Application number: CN202010664970.7A
Authority: CN
Inventors: 于振华
Original assignee: Hefei University of Technology
Current assignee: Hefei University of Technology
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-11-06
Anticipated expiration: 2040-07-10
Also published as: CN111887001B

Abstract

The invention provides a mower which comprises a rack, a mowing cutter head arranged on the lower side of the front part of the rack, a height adjusting device and a control panel, wherein the height adjusting device is connected with the rack and the mowing cutter head and is used for adjusting the height of the mowing cutter head; the height adjusting device comprises: the connecting assembly comprises a connecting plate which is rotatably connected to the rack, and the mowing cutter head is connected to the end part of the connecting plate; the manual adjusting assembly comprises an adjusting piece connected with the connecting plate and a positioning piece used for positioning the position of the adjusting piece; the electric adjusting assembly comprises a driving piece which is arranged on the rack and used for driving the connecting assembly to rotate, and a switching piece which is arranged between the driving piece and the connecting assembly and used for selectively connecting the driving piece and the connecting assembly; when a user drives the mower to pass through the steps, the user can quickly adjust the height of the mowing cutter head through the manual adjusting assembly; after a user drives the mower to be positioned on the lawn, the user can electrically adjust the height of the mowing cutter head through the driving piece.

Description

Grass cutter

Technical Field

The invention relates to the technical field of garden tools, in particular to a mower capable of manually or electrically adjusting the height of a mowing cutter head.

Background

With the development of large-area lawns, lawn mowers for lawn mowing have been widely used. Lawn mower generally includes the frame, connects in the anterior downside of frame for the grass cutting blade disc of mowing, is used for adjusting the height-adjusting device of grass cutting blade disc's height, among the prior art, height-adjusting device generally is manual regulation, and the operation is comparatively loaded down with trivial details.

Along with the popularization of lithium electricity, generally adopt electric putter electrical control now the height of cutterhead mows, the customer passes through the lift of on-off control cutterhead to reach suitable height of mowing, change in the operation. However, when a customer drives the lawn mower to enter or leave a lawn, the customer often encounters a step or the like, the mower disc needs to be lifted to the highest position when the customer passes the step, the telescopic rod of the electric push rod is driven by the worm gear and the worm, the telescopic speed is slow, the adjustment of the height of the mower disc to the highest position requires a long time, and uncomfortable operation feeling is brought to the customer.

In view of the above, there is a need for a new lawn mower to solve the above problems.

Disclosure of Invention

The invention aims to provide a mower which can manually or electrically adjust the height of a mower disc.

In order to achieve the purpose, the invention adopts the following technical scheme: a mower comprises a rack, a mowing cutter head arranged on the lower side of the front part of the rack, a height adjusting device which is connected with the rack and the mowing cutter head and is used for adjusting the height of the mowing cutter head, and a control panel which controls the mower to run; the height-adjusting device comprises:

the connecting assembly comprises a connecting plate which is rotatably connected to the rack, and the mower disc is connected to the end of the connecting plate;

the manual adjusting assembly comprises an adjusting piece connected with the connecting plate and a positioning piece used for positioning the position of the adjusting piece;

the electric adjusting assembly comprises a driving piece, a switching piece and a control panel, wherein the driving piece is arranged on the rack and used for driving the connecting assembly to rotate, the driving piece is arranged between the driving piece and the connecting assembly to be selectively connected with the driving piece and the connecting assembly, and the driving piece and the switching piece are electrically connected with the control panel.

As a further improved technical scheme of the invention, the connecting assembly further comprises a rotating shaft which is rotatably connected to the rack, and the connecting plate is fixedly connected to one end of the rotating shaft; the switching piece is connected to the rotating shaft.

As a further improved technical solution of the present invention, the switching element includes a mounting seat sleeved on the rotating shaft, a gear located in the mounting seat and fixedly connected to the rotating shaft, an engaging plate movably connected in the mounting seat, and a switching selection element for driving the engaging plate to disengage from or engage with the gear, and an end of the engaging plate is provided with an engaging tooth engaged with the gear.

As a further improved technical scheme of the invention, the meshing plate is a U-shaped metal meshing plate, meshing teeth are arranged at two ends of the U-shaped metal meshing plate, and the two meshing teeth are positioned at two opposite sides of the circumferential direction of the gear; the switching selection piece is used for driving the U-shaped metal meshing plate to be separated from the gear or driving one meshing tooth in the U-shaped metal meshing plate to be meshed with the gear.

As a further improved technical solution of the present invention, the switching piece further includes a spring connecting the U-shaped metal engaging plate to the inside of the mounting seat; the switching selection piece comprises two electromagnets and a switch, the two electromagnets are arranged in the mounting seat and are respectively arranged on two opposite sides of the U-shaped metal meshing plate, the switch selectively energizes the two electromagnets, and the switch is electrically connected with the control plate.

As a further improved technical scheme of the invention, the driving piece is provided with a telescopic rod, and one end of the telescopic rod facing the mounting seat is rotatably connected with the mounting seat.

As a further improved technical scheme of the invention, the number of the connecting components is two, and the two connecting components are arranged on the rack at intervals along the front-back direction; the height-adjusting assembly further comprises two connecting rods for linkage of the connecting assemblies, and the electric adjusting assembly acts on the connecting assemblies located on the rear side.

As a further improved technical scheme of the present invention, each of the connecting assemblies further includes a rotating shaft rotatably connected to the frame, and the connecting plate includes an L-shaped connecting plate fixedly connected to one end of the rotating shaft; l type connecting plate include fixed connection in change epaxial first board, fixed connection in the first board is close to the second board of the one end of pivot, the grass cutting blade disc connect in the second board is kept away from the one end of pivot, the both ends of connecting rod rotate respectively connect in two in coupling assembling on the first board.

As a further improved technical scheme of the invention, the connecting plate comprises an L-shaped connecting plate, the L-shaped connecting plate comprises a first plate rotatably connected to the frame and a second plate fixedly connected to one end of the first plate close to the frame, and the mower disc is connected to one end of the second plate far from the first plate; the adjusting part is rotatably connected with the adjusting plate on the first plate, and the positioning part comprises a positioning groove arranged on the adjusting plate, a positioning plate fixedly connected with the rack and provided with a plurality of positioning holes, and a positioning rod used for being matched with the positioning holes and the positioning groove.

As a further improved technical solution of the present invention, the manual adjustment assembly further includes a pedal fixed to an end of the first plate, and a fixing plate fixed to the frame for positioning the pedal.

The invention has the beneficial effects that: the mower is provided with the manual adjusting assembly and the electric adjusting assembly which are used for adjusting the height of the mowing cutter head at the same time, and can be switched between manual adjustment and electric adjustment, so that when a user drives the mower to pass through steps, the user can quickly adjust the height of the mowing cutter head through the manual adjusting assembly; after the user drives the mower to be positioned on the lawn, the user can electrically adjust the height of the mowing cutter head through the driving piece, and the operation is easy.

Drawings

Fig. 1 is a schematic view of the structure of the lawn mower of the present invention.

Fig. 2 is a schematic structural diagram of the height adjusting device in fig. 1.

Fig. 3 is a schematic view of the structure of fig. 2 from another angle.

Fig. 4 is an internal structure diagram of the switching member in fig. 2.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings, and reference is made to fig. 1 to 4, which are preferred embodiments of the present invention. It should be noted that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make functional, methodical, or structural equivalents or substitutions according to these embodiments without departing from the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", and the like in the present invention indicate orientation or positional relationship only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In this specification, it is to be noted that, unless otherwise explicitly stated or limited, the term "connected" or the like is to be interpreted broadly, and for example, the connection may be a direct connection or an indirect connection via an intermediate, and may be a fixed connection or a detachable connection or an integral connection. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 4, the present invention provides a lawn mower 100, wherein the lawn mower 100 is used for trimming a lawn.

The embodiment of the present invention is specifically described by taking the lawn mower 100 as a riding lawn mower. It should be noted that the technical spirit involved in the embodiments described below may be alternatively applied to other forms of lawnmowers, such as a walk-behind lawnmower.

Specifically, the mower 100 includes a frame 1, a mower deck 2 disposed on a lower side of a front portion of the frame 1, a height adjusting device 3 connected to the frame 1 and the mower deck 2 and used for adjusting a height of the mower deck 2, and a control panel (not shown) for controlling the mower 100 to operate.

In addition to the height adjusting device 3, the mower 100 of the present invention may have other structures, such as the specific structures of the frame 1, the front wheels and the rear wheels connected to the frame 1, the driving system connected to the rear wheels, the seat disposed in the middle of the body of the frame 1, the operating rod disposed in the front of the seat, and the mower deck 2, and the like, which are not described herein again.

The height adjusting device 3 comprises at least one group of connecting components 31 for connecting the frame 1 and the mowing cutter head 2, a manual adjusting component 32 for manually adjusting the height of the mowing cutter head 2 and an electric adjusting component 33 for electrically adjusting the mowing cutter head 2. The electric adjusting assembly 33 includes a driving member 331 mounted on the frame 1 and configured to drive the connecting assembly 31 to rotate, and a switching member 332 disposed between the driving member 331 and the connecting assembly 31 and configured to selectively connect the driving member 331 and the connecting assembly 31, wherein both the driving member 331 and the switching member 332 are electrically connected to the control board, and when a user drives the lawn mower 100 to pass through a step, the driving member 331 is disengaged from the connecting assembly 31 through the switching member 332, so that the user can quickly adjust the height of the lawn mower deck 2 through the manual adjusting assembly 32; after the user drives the lawn mower 100 to be positioned on a lawn, the driving member 331 is connected to the connecting assembly 31 through the switching member 332, so that the user can electrically adjust the height of the mower deck 2 through the driving member 331, and the operation is easy.

Specifically, coupling assembling 31 including rotate connect in connecting plate 311 on the frame 1, lawn mower dish 2 connect in the tip of connecting plate 311, manual adjusting part 32 and electronic adjusting part 33 all is used for the drive connecting plate 311 rotates, in order to adjust the height of tip, thereby the height of synchronous regulation lawn mower dish 2.

Specifically, the connecting assembly 31 further includes a rotating shaft 312 rotatably connected to the frame 1, and the connecting plate 311 is fixedly connected to an end of the rotating shaft 312, that is, the connecting plate 311 is rotatably connected to the frame 1 through the rotating shaft 312.

Further, in the embodiment in which the connection assembly 31 includes a rotating shaft 312 and a connecting plate 311 at the end of the rotating shaft 312, the manual adjustment assembly 32 acts on the connecting plate 311, and the electric adjustment assembly 33 acts on the rotating shaft 312, which facilitates the structural optimization of the height-adjusting device 3; of course, this is not a limitation.

Further, the connection plate 311 includes an L-shaped connection plate 3111 fixedly connected to one end of the rotation shaft 312, and a sub-connection plate 3112 fixed to the other end of the rotation shaft 312; l type connecting plate 3111 include fixed connection in first board 3113, fixed connection in pivot 312 are in first board 3113 is close to the second board 3114 of the one end of pivot 312, grass cutting head 2 connect in second board 3114 and sub-connecting plate 3112 keeps away from the one end of pivot 312, the reinforcing coupling assembling 31 is right the stability that grass cutting head 2 is fixed, thereby improves the stability of grass cutting head 2 operation.

It can be understood that, in the embodiment that the connection plate includes an L-shaped connection plate 3111 fixedly connected to one end of the rotation shaft 312 and a sub-connection plate 3112 fixed to the other end of the rotation shaft 312, the manual adjustment assembly 32 acts on the L-shaped connection plate 3111, and when the manual adjustment assembly 32 is used for adjustment, the sub-connection plate 3112 is linked with the L-shaped connection plate 3111 through the rotation shaft, so that the mowing height of each part of the mowing cutter disc 2 can be adjusted synchronously.

In this embodiment, the quantity of coupling assembling 31 is two, and two coupling assembling 31 sets up along front and back direction interval, further strengthens the fixed stability of grass cutting cutter 2, strengthens the stationarity that grass cutting cutter 2 moved, strengthens the planarization of lawn mower 100 to the pruning on lawn.

Further, in the embodiment that the number of the connecting assemblies 31 is two, the height-adjusting assembly further includes a connecting rod 34 linking the two connecting assemblies 31, specifically, two ends of the connecting rod 34 are respectively rotatably connected to the first plates 3113 of the two connecting assemblies 31, so that the two connecting assemblies 31 can rotate synchronously to synchronously adjust the mowing height of the mowing cutter head 2, and the smoothness of the lawn mowing by the mower 100 is enhanced.

Specifically, in the embodiment that the number of coupling assembling 31 is two, manual regulation subassembly 32 is used for being located the front side coupling assembling 31, electric regulation subassembly 33 is used for being located the rear side coupling assembling 31, optimizes the structural design of height-adjusting device 3, and more accords with user's use habit, reinforcing user experience comfort.

Further, manual regulation subassembly 32 include with regulating part 321 that the connecting plate is connected, be used for the location the setting element 322 of the position of regulating part 321, promptly, the user is through adjusting regulating part 321 drives the connecting plate rotates, adjusts the connecting plate with the height of the tip that lawn mower dish 2 is connected, in order to incite somebody to action lawn mower dish 2 is adjusted to the height of mowing, then fixes a position through setting element 322 the position of regulating part 321 will lawn mower dish 2 is located the high department of mowing can.

In a specific embodiment, the adjusting part 321 is connected for rotating in the adjusting plate on the first plate 3113, the positioning part 322 is including locating positioning groove 3221, fixed connection on the adjusting plate in the frame 1 and have a positioning plate 3222 of a plurality of positioning holes, for with positioning hole and positioning groove 3221 matched with locating lever 3223, need manual regulation when the height of the mowing cutter head 2, take out the positioning lever 3223, adjust the adjusting plate drives the connecting plate rotates after the mowing cutter head 2 is located mowing height, insert the positioning lever 3223 with can in the corresponding positioning hole of the tip of positioning groove 3221 and the positioning groove 3221.

Further, manual regulation subassembly 32 is still including being fixed in the footboard 323 of the tip of first board 3113, be fixed in be used for the location in the frame 1 the fixed plate 324 of footboard 323, when needing manual regulation when the height of grass cutting blade disc 2, the user step on the footboard 323, will footboard 323 is fixed in on the fixed plate 324, at this moment, grass cutting blade disc 2 is located the highest point, then the user takes out locating lever 3223, and adjust the position of regulating plate will grass cutting blade disc 2 is adjusted to the height department of mowing, is adjusting before the position of regulating plate, will in advance grass cutting blade disc 2 is adjusted to highest position department, and the user of being convenient for is subsequent through adjusting the relative position of regulating plate and locating plate 3222.

It can be understood that, after the user adjusts the mower disc 2 to the mowing height and inserts the positioning rod 3223 into the positioning hole and positioning groove 3221, the user steps on the pedal 323 to disengage the pedal 323 from the fixing plate 324, so that the mower disc 2 automatically falls back to the mowing height.

Further, the switching member 332 includes a mounting seat 3321 sleeved on the rotating shaft 312, a gear 3322 located in the mounting seat 3321 and fixedly connected to the rotating shaft 312, an engaging plate 3323 movably connected to the mounting seat 3321, and a switching selector for driving the engaging plate 3323 to disengage from the gear 3322 or to engage with the gear 3322, wherein an end of the engaging plate 3323 is provided with engaging teeth engaged with the gear 3322, and when the switching selector drives the engaging plate 3323 to disengage from the gear 3322, the rotating shaft 312 is in a free state of being freely rotated, that is, the height of the mower deck 2 can be adjusted by the manual adjustment assembly 32; when the switching selection piece drives the engagement plate 3323 to engage with the gear 3322, the rotation shaft 312 can be driven to rotate only when the driving piece 331 drives the switching piece 332 to rotate, so as to adjust the height of the mower disc 2.

In this embodiment, the following description will be made by taking an example in which the rotating shaft 312 rotates clockwise to adjust the mower disc 2 to move upward, and the rotating shaft 312 rotates counterclockwise to adjust the mower disc 2 to move downward. Of course, this is not a limitation.

In one embodiment, the engaging plate 3323 is a U-shaped metal engaging plate, the U-shaped metal engaging plate includes a front plate and a rear plate that are spaced apart from each other in a front-rear direction, and a connecting plate that is connected to lower ends of the front plate and the rear plate, ends of the front plate and the rear plate that are away from the connecting plate are respectively provided with engaging teeth that are engaged with the gear 3322, and after the U-shaped metal engaging plate is installed in the mounting seat 3321, the front plate and the rear plate are located on opposite sides of a circumferential direction of the gear 3322; the switching selection piece is used for driving the U-shaped metal meshing plate to be disengaged from the gear 3322 or driving one meshing tooth of the U-shaped metal meshing plate to be meshed with the gear 3322, when the switching selection piece drives the meshing tooth on the front plate to be meshed with the gear 3322, the driving piece 331 can drive the switching piece 332 to rotate anticlockwise and drive the rotating shaft 312 to rotate anticlockwise so as to adjust the mower disc 2 to move downwards, and when the switching selection piece drives the meshing tooth on the rear plate to be meshed with the gear 3322, the driving piece 331 can drive the switching piece 332 to rotate clockwise and drive the rotating shaft 312 to rotate clockwise so as to adjust the mower disc 2 to move upwards.

In one embodiment, the front plate, the rear plate and the connecting plate are integrally formed into the U-shaped metal engaging plate; of course, this is not a limitation.

Further, the switching member 332 further includes a spring 3325 connecting the U-shaped metal engagement plate to the mounting seat 3321, and specifically, the spring 3325 is connected to the connection plate to make the U-shaped metal engagement plate 3323 in a state of being able to rock back and forth.

Further, the switching selection member includes two electromagnets 3324 disposed in the mounting seat 3321 and respectively disposed on two opposite sides of the U-shaped metal engaging plate 3323, and a switch (not shown) for selectively energizing the two electromagnets 3324, wherein the switch is electrically connected to the control board.

It can be understood that the two electromagnets 3324 are respectively disposed on two opposite sides of the U-shaped metal engaging plate 3323 along the front-back direction, and respectively include a front electromagnet 3324 close to the front plate and a rear electromagnet 3324 close to the rear plate. When the front electromagnet 3324 and the rear electromagnet 3324 are not electrified by the change-over switch, the meshing teeth on the front plate and the rear plate are disengaged from the gear 3322, at this time, the rotating shaft 312 is in a free state, and the height of the mower disc 2 can be adjusted by the manual adjusting assembly 32; when the front electromagnet 3324 is powered by the switch, the U-shaped metal engaging plate 3323 moves forward, so that the engaging teeth on the rear plate are engaged with the gear 3322, and the driving member 331 can drive the switch 332 to rotate clockwise and drive the rotating shaft 312 to rotate clockwise, so as to adjust the mower disc 2 to move upward; when the rear electromagnet 3324 is energized by the switch, the U-shaped metal engaging plate 3323 moves backward, so that the engaging teeth on the front plate are engaged with the gear 3322, and the driving member 331 can drive the switch member 332 to rotate counterclockwise and drive the rotating shaft 312 to rotate counterclockwise, so as to adjust the mower disc 2 to move downward.

In a specific embodiment, the driving member 331 is an electric push rod, and the structure of the electric push rod can be similar to the existing structure, which is not described herein again. Of course, it is not limited thereto, and other driving members 331 capable of driving the switching member 332 to rotate are within the scope of the invention.

Specifically, in the embodiment where the driving member 331 is an electric push rod, the driving member 331 has a telescopic rod 3311, and one end of the telescopic rod 3311 facing the mounting seat 3321 is rotatably connected to the mounting seat 3321.

The method of use of the mower 100 of the present invention is as follows:

when the height of the mowing cutter head 2 needs to be adjusted manually, the change-over switch is pressed to enable the front magnet and the rear magnet to be not electrified, then a user steps on the pedal 323 to fix the pedal 323 on the fixing plate 324, at the moment, the mowing cutter head 2 is located at the highest position, then the user takes out the positioning rod 3223, adjusts the position of the adjusting plate to adjust the mowing cutter head 2 to the mowing height, inserts the positioning rod 3223 into the positioning hole and the positioning groove 3221, and finally steps on the pedal 323 by the user to enable the pedal 323 to be separated from the fixing plate 324, and the mowing cutter head 2 automatically falls to the mowing height.

When the height of the mower deck 2 needs to be electrically adjusted, firstly, a user steps on the pedal 323 by foot, the pedal 323 is fixed on the fixing plate 324, at this time, the mower deck 2 is located at the highest position, then the user takes out the positioning rod 3223, at this time, the mowing cutter head 2 is located at the lowest position, and finally, according to the mowing height, if necessary, the mowing cutter head 2 is adjusted upwards, the switch is pressed to energize the front electromagnet 3324, the driving member 331 drives the switching member 332 to rotate clockwise, and drives the rotating shaft 312 to rotate clockwise, so as to adjust the mowing cutter head 2 upwards, and if the mowing cutter head 2 needs to be adjusted downwards, then, the switch is pressed to electrify the rear electromagnet 3324, and the driving member 331 drives the switching member 332 to rotate counterclockwise and drives the rotating shaft 312 to rotate counterclockwise, so as to adjust the mower disc 2 downward.

In summary, the mower 100 of the present invention is provided with the manual adjustment assembly 32 and the electric adjustment assembly 33 for adjusting the height of the mower deck 2 at the same time, and can switch between the manual adjustment and the electric adjustment, so that when a user drives the mower 100 to pass through a step, the user can quickly adjust the height of the mower deck 2 through the manual adjustment assembly 32; after the user drives the mower 100 to be positioned on a lawn, the user can electrically adjust the height of the mower disc 2 through the driving element 331, and the operation is easy.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A mower comprises a rack, a mowing cutter head arranged on the lower side of the front part of the rack, a height adjusting device which is connected with the rack and the mowing cutter head and is used for adjusting the height of the mowing cutter head, and a control panel which controls the mower to run; the method is characterized in that: the height-adjusting device comprises:

2. The mower of claim 1, wherein: the connecting assembly further comprises a rotating shaft which is rotatably connected to the rack, and the connecting plate is fixedly connected to one end of the rotating shaft; the switching piece is connected to the rotating shaft.

3. The mower of claim 2, wherein: the switching piece comprises a mounting seat sleeved on the rotating shaft, a gear which is positioned in the mounting seat and fixedly connected to the rotating shaft, a meshing plate movably connected in the mounting seat, and a switching selection piece for driving the meshing plate to be separated from the gear or meshed with the gear, wherein meshing teeth meshed with the gear are arranged at the end part of the meshing plate.

4. A lawnmower as claimed in claim 3, wherein: the meshing plate is a U-shaped metal meshing plate, meshing teeth are arranged at two ends of the U-shaped metal meshing plate, and the two meshing teeth are located on two opposite sides of the circumferential direction of the gear; the switching selection piece is used for driving the U-shaped metal meshing plate to be separated from the gear or driving one meshing tooth in the U-shaped metal meshing plate to be meshed with the gear.

5. The mower of claim 4, wherein: the switch further comprises a spring connecting the U-shaped metal engaging plate into the mounting seat; the switching selection piece comprises two electromagnets and a switch, the two electromagnets are arranged in the mounting seat and are respectively arranged on two opposite sides of the U-shaped metal meshing plate, the switch selectively energizes the two electromagnets, and the switch is electrically connected with the control plate.

6. A lawnmower as claimed in claim 3, wherein: the driving piece is provided with a telescopic rod, and one end of the telescopic rod, facing the mounting seat, is rotatably connected with the mounting seat.

7. The mower of claim 1, wherein: the number of the connecting assemblies is two, and the two connecting assemblies are arranged on the rack at intervals along the front-back direction; the height-adjusting assembly further comprises two connecting rods for linkage of the connecting assemblies, and the electric adjusting assembly acts on the connecting assemblies located on the rear side.

8. The mower of claim 7, wherein: each connecting assembly further comprises a rotating shaft which is rotatably connected to the rack, and each connecting plate comprises an L-shaped connecting plate which is fixedly connected to one end of the rotating shaft; l type connecting plate include fixed connection in change epaxial first board, fixed connection in the first board is close to the second board of the one end of pivot, the grass cutting blade disc connect in the second board is kept away from the one end of pivot, the both ends of connecting rod rotate respectively connect in two in coupling assembling on the first board.

9. The mower of claim 1, wherein: the connecting plate comprises an L-shaped connecting plate, the L-shaped connecting plate comprises a first plate and a second plate, the first plate is rotatably connected to the rack, the second plate is fixedly connected to one end, close to the rack, of the first plate, and the mowing cutter head is connected to one end, far away from the first plate, of the second plate; the adjusting part is rotatably connected with the adjusting plate on the first plate, and the positioning part comprises a positioning groove arranged on the adjusting plate, a positioning plate fixedly connected with the rack and provided with a plurality of positioning holes, and a positioning rod used for being matched with the positioning holes and the positioning groove.

10. The mower of claim 9, wherein: the manual adjusting assembly further comprises a pedal fixed at the end of the first plate and a fixing plate fixed on the rack and used for positioning the pedal.