CN217905229U

CN217905229U - Grass cutter

Info

Publication number: CN217905229U
Application number: CN202222331279.4U
Authority: CN
Inventors: 孙剑峰; 杨亚男
Original assignee: Ningbo Ruilin Machinery Technology Co ltd
Current assignee: Ningbo Ruilin Machinery Technology Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-29
Anticipated expiration: 2032-08-31

Abstract

The application relates to a mower, which belongs to the technical field of mowing equipment and comprises a shell, a roller mechanism arranged at the bottom of the shell and a rotating piece abutted against the bottom of the shell, wherein the roller mechanism is rotatably arranged at the bottom of the rotating piece, and the rotating piece is rotatably connected with the shell; the rotating part and/or the bottom of the shell is/are provided with a control device, and the control device is used for controlling the on-off of a circuit where a driving motor arranged in the shell is located. This application has and makes lawn mower when being lifted up, and blade disc and cutting blade are difficult for causing the effect of injury to people's limbs.

Description

Grass cutter

Technical Field

The application relates to the technical field of mowing equipment, in particular to a mower.

Background

At present, in order to improve mowing efficiency, reduce gardeners' work load simultaneously, often adopt the lawn mower to replace the manual work to mow.

Among the correlation technique, lawn mower includes the casing, sets up in the blade disc of casing bottom and is located the below of casing and is used for supporting the gyro wheel of casing, and the blade disc is rotated by the motor drive who installs in the casing, and is provided with the cutting blade on the blade disc to the vegetation is cut.

In view of the above-mentioned related arts, the inventor thinks that in the above-mentioned technical solutions, when the mower runs into a hindrance or finishes mowing an area, the mower needs to be lifted, and at this time, the cutter head and the cutting blades on the cutter head rotating at the bottom of the housing are prone to cause injury to limbs of a person.

SUMMERY OF THE UTILITY MODEL

In order to make lawn mower when being lifted up, the difficult injury that causes people's limbs of blade disc and cutting blade, this application provides a lawn mower.

The application provides a lawn mower adopts following technical scheme:

a mower comprises a shell, a roller mechanism arranged at the bottom of the shell and a rotating piece used for being abutted against the bottom of the shell, wherein the roller mechanism is rotatably arranged at the bottom of the rotating piece, and the rotating piece is rotatably connected with the shell;

the rotating part and/or the bottom of the shell is/are provided with a control device, and the control device is used for controlling the on-off of a circuit where a driving motor arranged in the shell is located.

By adopting the technical scheme, when the mower normally runs, the rotating piece is abutted against the bottom of the shell, so that the roller mechanism is supported; when the mower is lifted, the rotating piece rotates under the action of the gravity of the roller mechanism, the distance between the rotating piece and the shell changes, the control device disconnects the circuit of the driving motor, the driving motor stops working, the cutter head at the bottom of the shell stops rotating, and the cutter head and the cutting blade are not easy to hurt limbs of a person when the mower is lifted.

Optionally, the control device includes a magnetic block disposed on the rotating member and a hall sensor disposed at the bottom of the casing, and the hall sensor is configured to control on/off of a circuit where the driving motor is located.

Through adopting above-mentioned technical scheme, when the lawn mower was by the lifting, the distance that rotates between piece and the casing bottom changed, and the distance between hall sensor and the magnetic path changed this moment, and hall sensor passes through the change of distance, the disconnection of control driving motor place circuit to make blade disc and cutting blade stall.

Optionally, the rotating part comprises an abutting part and a rotating part fixedly connected with the abutting part, the roller mechanism is rotatably arranged at the bottom of the abutting part, a rotating pipe is arranged on the rotating part, and a connecting rod which is rotatably arranged in the rotating pipe in a penetrating manner is arranged on the shell.

Through adopting above-mentioned technical scheme, through setting up the rotating tube to make the connecting rod rotate and wear to locate in the rotating tube, compare in the mode that directly sets up the rotation hole conventionally, increased the area of contact between dwang and the rotation portion, thereby make the rotation between rotation piece and the casing be connected more stably.

Optionally, the rotating part includes an abutting portion and a rotating portion fixedly connected to the abutting portion, a rotating hole is formed in the rotating portion, a connecting rod is arranged on the casing and penetrates through the rotating hole in a rotating mode, an extending block is arranged on one side of the rotating portion, which is far away from the abutting portion, and the extending block is used for being abutted to the bottom of the casing.

Through adopting above-mentioned technical scheme, through setting up the extension piece, and extension piece and butt portion are located the both sides in rotation hole respectively, and when the lawn mower was lifted, butt portion kept away from the casing, extended the bottom looks butt of piece and casing to restrict the turned angle who rotates the piece, make the difficult too big condition of turned angle that appears of rotating.

Optionally, the magnetic block is disposed on a side of the extension block close to the bottom of the housing.

Through adopting above-mentioned technical scheme, when setting up the magnetic path on extending the piece, when the lawn mower was lifted, the bottom butt of extending piece and casing was close to the hall sensor of casing bottom to the magnetic path on the extension piece this moment makes driving motor stall, makes the blade disc be difficult for causing the injury to people's limbs.

Optionally, the roller mechanism includes a rotating block and a roller, the rotating block is rotatably disposed on the abutting portion, an installation cavity for placing the roller is formed in the rotating block, and a shaft lever for the roller to rotatably sleeve is disposed on the rotating block;

the mounting block is internally provided with a limit screw penetrating through the abutting part, the limit screw is connected with a limit nut in a threaded manner, and the limit nut is used for blocking the rotating block from falling off from the abutting part.

Through adopting above-mentioned technical scheme, through adopting limit nut and limit screw matched with mode, be connected turning block and butt portion, make things convenient for the installation and the dismantlement between turning block and the butt portion.

Optionally, the abutting portion is provided with a rotating ring groove for the rotating block to rotatably penetrate.

Through adopting above-mentioned technical scheme, carry out spacing direction to the rotation of turning block, make the rotation of turning block and the rotation of gyro wheel more stable.

Optionally, be provided with the beaded finish groove in the butt portion, the radius of beaded finish groove is greater than the radius of rotating the annular, the beaded finish groove is located the below of rotating the annular and with the rotating ring groove communicates mutually, be provided with on the turning block and rotate the embedding the beaded finish of beaded finish groove.

By adopting the technical scheme, the rotating block is supported by the reinforcing ring, so that the rotating block is not easy to incline in the rotating ring groove.

Optionally, the bottom of the abutting portion is provided with a screw hole through which the limiting screw penetrates, the top of the abutting portion is provided with a connecting hole communicated with the screw hole, the aperture of the connecting hole is larger than that of the screw hole, the magnetic block is sleeved on the limiting screw, and the limiting nut compresses the magnetic block at the bottom of the connecting hole.

By adopting the technical scheme, the magnetic block is tightly pressed at the bottom of the connecting hole through the limiting nut, so that the magnetic block is convenient to mount.

Optionally, a limiting groove for allowing the rotating member to be rotatably embedded is formed in the bottom of the housing.

Through adopting above-mentioned technical scheme, when the lawn mower normally walks, rotate the bottom butt of piece and casing, through the limiting displacement of spacing groove to rotating the piece this moment, make to rotate the difficult relative slip that takes place with the casing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the mutual matching of the magnetic block and the Hall element, when the mower is lifted, the cutter head can stop rotating, so that the cutter head is not easy to damage the limbs of people;

2. the rotating pipe is arranged, so that the contact area between the shell and the rotating part is increased, and the shell can better support the rotating part;

3. through setting up stop nut and limit screw, make things convenient for the installation between turning block and the butt portion fixed.

Drawings

Fig. 1 is a schematic view of the overall structure of a lawnmower according to an embodiment of the present application.

Fig. 2 is an exploded view of the roller mechanism, the rotating member and the housing according to the embodiment of the present application.

Fig. 3 is a schematic view of the overall structure of the roller mechanism and the rotating member according to the embodiment of the present application.

Fig. 4 is a sectional view of the roller mechanism and the rotating member according to the embodiment of the present application.

Description of the reference numerals: 1. a housing; 11. a cutter head; 111. a cutting blade; 12. a connecting rod; 13. a limiting plate; 131. a limiting groove; 14. mounting grooves; 2. a roller mechanism; 21. rotating the block; 22. a roller; 23. a mounting cavity; 24. a shaft lever; 25. a limit screw; 251. a limit nut; 26. a rotating ring; 261. a reinforcement ring; 3. a rotating member; 4. an abutting portion; 41. a screw hole; 42. connecting holes; 43. an end cap; 44. rotating the ring groove; 45. a reinforcement ring groove; 46. a cushion block; 5. a rotating part; 51. rotating the hole; 52. rotating the tube; 53. an extension block; 6. a magnetic block; 7. and a Hall sensor.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a mower.

Referring to fig. 1 and 2, the lawn mower includes a housing 1, a roller mechanism 2 disposed at the bottom of the housing 1, and a rotating member 3, in the present embodiment, the roller mechanism 2 is a front wheel of the lawn mower, and a rear wheel of the lawn mower is a driving wheel. And two roller mechanisms 2 are provided.

Referring to fig. 1, a cutter disc 11 is installed at the bottom of a casing 1, and a plurality of cutting blades 111 are fixedly connected to the outer circumferential edge of the cutter disc 11 through screws. The cutter head 11 is driven to rotate by a driving motor (not shown) disposed inside the casing 1, so as to drive the cutting blades 111 to rotate, and further, the vegetation is cut by the cutting blades 111.

Referring to fig. 2, the rotating member 3 includes a columnar abutting portion 4 and a long rotating portion 5, the rotating portion 5 and the abutting portion 4 are perpendicular to each other and integrally connected, and the rotating portion 5 is rotatably disposed at the bottom of the housing 1. The roller mechanism 2 includes a rotating block 21 rotatably provided on the abutting portion 4 and a roller 22.

Referring to fig. 2 and 3, the rotating part and/or the bottom of the housing is provided with a control device for controlling the on-off of a circuit where the driving motor is located, so as to control whether the cutter head and the cutting blade rotate or not. In this embodiment, the control device includes a magnetic block 6 and a hall sensor 7, in this embodiment, the magnetic block 6 is disposed on the abutting portion 4, and the hall sensor 7 is disposed on the housing 1. The hall sensor 7 is a switching type hall sensor. The hall sensor 7 is electrically connected with a circuit of the driving motor, so that the driving motor is controlled to be electrified, and then whether the cutter head 11 and the cutting blade 111 rotate or not is controlled.

Referring to fig. 2 and 3, when the roller 22 is lifted, under the action of the gravity of the roller 22, the abutting portion 4 rotates towards the direction away from the bottom of the housing 1, the magnetic block 6 on the abutting portion 4 is away from the hall sensor 7 on the housing 1, and at this time, the hall sensor 7 controls the driving motor to stop working, so that the cutter disc 11 and the cutting blade 111 on the cutter disc 11 stop rotating, and the limbs of a person are not easily injured. During the normal walking process of the mower, due to the gravity of the mower, the roller 22 is in contact with the ground, and the side of the abutting portion 4 away from the roller 22, namely the top of the abutting portion 4 abuts against the housing 1. At this time, the hall sensor 7 does not affect the operating state of the drive motor.

The switch for controlling the rotation of the driving motor is not only the hall sensor 7 in the embodiment, but also other switches connected in series with the hall sensor 7 are arranged on the circuit where the driving motor is located, namely, when the hall sensor 7 is in a disconnected state with respect to the control state of the circuit, the driving motor stops working; when the control state of the circuit by the Hall sensor is open, the driving motor is not necessarily open, and only when the switches of the circuit where the driving motor is located are all closed, the driving motor can rotate. Namely, when the mower is lifted, the cutter head 11 stops rotating; when the mower is placed on the ground, the driving motor does not necessarily rotate, and other switches need to be manually adjusted to be in a closed state at the moment to control the driving motor to work, so that the cutter head 11 rotates.

The magnetic block 6 controls the Hall sensor 7 through the distance between the magnetic block and the Hall sensor 7, and when the distance between the magnetic block and the Hall sensor 7 reaches a preset induction distance, the Hall sensor 7 can feel the influence of the magnetic block 6 on the magnetic field inside the Hall sensor 7, so that the drive motor is controlled. The preset sensing distance is related to the magnetic force of the magnetic block 6 and the type of the hall sensor 7, and the electrical connection mode between the hall sensor 7 and the driving motor is well known to those skilled in the art, and is not described in detail in this embodiment.

In another embodiment, the control device is not limited to control the rotation of the cutter head by the way that the magnetic block 6 and the hall sensor are matched with each other, for example, a pressure sensor for controlling the on-off of a circuit where the driving motor is located can be arranged at the bottom of the shell, when the mower normally walks, the pressure sensor is abutted against the abutting part, and the driving motor normally works; when the mower is lifted, the abutting portion does not extrude the pressure sensor, the pressure value sensed by the pressure sensor is zero, the driving motor stops rotating, and therefore the cutter disc and the cutting blade stop rotating. The triggering condition of stopping rotation of the driving motor is not limited to the condition that the pressure value sensed by the pressure sensor is zero, when the pressure value sensed by the pressure sensor is smaller than a preset pressure value, the driving motor stops rotating, and the preset pressure value is far smaller than the gravity of the mower. The circuit diagram for controlling the on/off of the circuit through the pressure sensor is well known to those skilled in the art, and is not described in detail in this embodiment.

Referring to fig. 2 and 3, a rotation hole 51 is formed in the rotation portion 5, and a connection rod 12 rotatably inserted into the rotation hole 51 is integrally connected to the housing 1 such that the rotation portion 5 rotates about the connection rod 12 as a rotation axis. Further, a rotating pipe 52 is integrally connected to the rotating portion 5, and a rotating hole 51 is formed in the rotating pipe 52. By providing the rotating tube 52, the contact area between the rotating portion 5 and the connecting rod 12 is increased, thereby making the rotating process of the rotating portion 5 more stable.

The rotation connection between the rotation part 5 and the housing 1 is not limited to the opening of the rotation part 5, the housing 1 is provided with the connection rod 12, or the rotation part 5 may be provided with a rotation rod, and the housing 1 is provided with a rotation hole 51 through which the rotation rod is rotatably inserted.

Referring to fig. 2 and 3, an extending block 53 extends from a side of the rotating portion 5 away from the abutting portion 4, and the rotating tube 52 is located between the abutting portion 4 and the extending block 53. When the mower is normally running, the abutting portion 4 abuts against the bottom of the housing 1, and a certain gap is formed between the extending block 53 and the bottom of the housing 1. When the roller 22 is lifted, the abutting portion 4 is lowered by the gravity of the roller 22, and the extension block 53 is raised and abuts against the bottom of the housing 1, thereby limiting the rotation angle of the rotation portion 5.

In another embodiment, the magnetic block may be disposed on the extension block 53, and the hall sensor is disposed at a position corresponding to the extension block 53 on the bottom of the housing 1, but the hall sensor controls the rotating motor in a manner opposite to the above-mentioned manner, that is, when the magnetic block is close to the hall sensor, the driving motor stops working.

Referring to fig. 2, the bottom of the housing 1 is provided with a limiting groove 131 for the abutting portion 4 to be inserted into, in this embodiment, the limiting groove 131 is defined by two limiting plates 13 on the housing 1. When the abutting portion 4 abuts against the bottom of the housing 1, the stopper plate 13 restricts the abutting portion 4 so that the abutting portion 4 is less likely to slide on the bottom of the housing 1. And at the same time, the connecting rod 12 is not easy to be separated from the rotating tube 52.

In this embodiment, the magnetic block 6 is disposed on the abutting portion 4. The bottom of the housing 1 is provided with an installation groove 14 communicated with the limiting groove 131, and the hall sensor 7 is fixed in the installation groove 14 by means of bonding or bolts.

Referring to fig. 3, a mounting cavity 23 for placing the roller 22 is formed in the rotating block 21, a shaft lever 24 is arranged on the rotating block 21, and the roller 22 is rotatably sleeved on the shaft lever 24.

Referring to fig. 3 and 4, the bottom of the abutting portion 4 is formed with a screw hole 41, the top of the abutting portion 4 is formed with a connection hole 42 communicating with the screw hole 41, and the radius of the connection hole 42 is larger than that of the screw hole 41. The rotating block 21 is provided with a limit screw 25 in a penetrating manner, the limit screw 25 is connected with a limit nut 251 in a threaded manner, the limit screw 25 is arranged in the screw hole 41 and the connecting hole 42 in a penetrating manner, and the limit nut 251 is positioned in the connecting hole 42. Meanwhile, the top of the abutting portion 4 is provided with an end cap 43 covering the connecting hole 42 by means of snap-fitting or adhesive fixing.

Referring to fig. 4, in this embodiment, the magnetic block 6 is sleeved on the limit screw 25, and the limit nut 251 abuts against the top of the magnetic block 6, so that the magnetic block 6 is pressed against the bottom of the connecting hole 42. At this time, the stopper nut 251 abuts against the magnetic block 6, and the nut portion of the stopper screw 25 abuts against the rotary block 21, so that the rotary block 21 is less likely to fall off from the abutting portion 4.

In another embodiment, the magnetic block may be fixed on the top of the abutting portion 4 by bonding or clipping, for example, the end cap 43 at this time may be used as a magnetic block that interacts with the hall sensor.

Referring to fig. 4, the top of the turning block 21 abuts against the bottom of the abutting portion 4, the turning ring 26 extends from the turning block 21, and the abutting portion 4 is provided with a turning ring groove 44 into which the turning ring 26 is fitted in a turning manner. Furthermore, a reinforcing ring 261 is integrally connected to the circumferential outer side wall of the rotating ring 26, the radius of the reinforcing ring 261 is larger than that of the rotating ring 26, and a reinforcing ring groove 45 for the reinforcing ring 261 to be rotatably embedded is formed in the groove wall of the rotating ring groove 44 of the abutting portion 4. By providing the reinforcement ring groove 45 and the reinforcement ring 261, the inclination between the turning block 21 and the abutting portion 4 is made less likely to occur, so that the rotational connection between the turning block 21 and the abutting portion 4 is made more firm.

Referring to fig. 4, the abutting portion 4 is provided with a spacer 46, the limit screw 25 is inserted into the spacer 46, and the top of the rotating block 21 abuts against the spacer 46.

The implementation principle of this application embodiment lawn mower does: when the mower normally walks, the abutting part 4 abuts against the bottom of the shell 1, the distance between the magnetic block 6 and the Hall sensor 7 is within a preset sensing distance, and the driving motor normally works; when the mower is lifted, the rotating part 5 rotates, the abutting part 4 and the magnetic block 6 move towards the direction far away from the bottom of the shell 1, the distance between the magnetic block 6 and the Hall sensor 7 exceeds the preset induction distance, and the driving motor stops working at the moment, so that the cutter disc 11 and the cutting blade 111 are not easy to damage limbs of a person.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A lawnmower, comprising: the roller mechanism comprises a shell (1), a roller mechanism (2) arranged at the bottom of the shell (1) and a rotating piece (3) used for being abutted against the bottom of the shell (1), wherein the roller mechanism (2) is rotatably arranged at the bottom of the rotating piece (3), and the rotating piece (3) is rotatably connected with the shell (1);

the motor is characterized in that a control device is arranged at the bottom of the rotating piece (3) and/or the shell (1), and the control device is used for controlling the on-off of a circuit where a driving motor is arranged in the shell (1).

2. A lawnmower as claimed in claim 1, wherein: the control device comprises a magnetic block (6) arranged on the rotating piece (3) and a Hall sensor (7) arranged at the bottom of the shell (1) and magnetically matched with the magnetic block (6), and the Hall sensor (7) is used for controlling the on-off of a circuit where the driving motor is located.

3. A lawnmower as claimed in claim 1, wherein: rotate piece (3) including butt portion (4) and with butt portion (4) fixed connection's rotation portion (5), gyro wheel mechanism (2) rotate set up in the bottom of butt portion (4), be provided with rotating tube (52) on rotation portion (5), be provided with on casing (1) and rotate and wear to locate connecting rod (12) in rotating tube (52).

4. A lawnmower as claimed in claim 2, wherein: rotate piece (3) including butt portion (4) and with butt portion (4) fixed connection's rotation portion (5), rotation hole (51) have been seted up on rotation portion (5), be provided with on casing (1) and rotate and wear to locate rotate connecting rod (12) in hole (51), keep away from on rotation portion (5) one side of butt portion (4) is provided with extension piece (53), extension piece (53) be used for with the bottom looks butt of casing (1).

5. A lawnmower according to claim 4, wherein: the magnetic block (6) is arranged on one side of the extension block (53) close to the bottom of the shell (1).

6. A lawnmower according to claim 4, wherein: the roller mechanism (2) comprises a rotating block (21) and a roller (22) which are rotatably arranged on the abutting part (4), a mounting cavity (23) for placing the roller (22) is formed in the rotating block (21), and a shaft lever (24) for rotatably sleeving the roller (22) is arranged on the rotating block (21);

a limiting screw rod (25) penetrating through the abutting portion (4) is arranged in the rotating block (21), a limiting nut (251) is connected to the limiting screw rod (25) in a threaded mode, and the limiting nut (251) are used for preventing the rotating block (21) from falling off from the abutting portion (4).

7. A lawnmower according to claim 6, wherein: the abutting part (4) is provided with a rotating ring groove (44) for the rotating block (21) to rotatably penetrate.

8. A lawnmower according to claim 7, wherein: be provided with on butt portion (4) and strengthen annular groove (45), the radius of strengthening annular groove (45) is greater than rotate the radius of annular groove (44), strengthen annular groove (45) with it is linked together to rotate annular groove (44), be provided with on turning block (21) and rotate the embedding strengthen ring (261) of annular groove (45).

9. A lawnmower according to claim 6, wherein: the bottom of butt portion (4) is seted up the confession screw rod hole (41) that limit screw (25) were worn to establish, the top of butt portion (4) seted up with connecting hole (42) that screw rod hole (41) are linked together, the aperture of connecting hole (42) is greater than screw rod hole (41), magnetic path (6) cover is established on limit screw (25), stop nut (251) will magnetic path (6) compress tightly at the bottom of the hole of connecting hole (42).

10. A lawnmower as claimed in claim 1, wherein: the bottom of the shell (1) is provided with a limit groove (131) for the rotating piece (3) to be rotatably embedded.