CN217363833U

CN217363833U - Cutting assembly and mobile device

Info

Publication number: CN217363833U
Application number: CN202220027621.9U
Authority: CN
Inventors: 杜江; 程坤; 王向荣
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-09-06
Anticipated expiration: 2032-01-06
Also published as: WO2023131294A1

Abstract

The utility model relates to a cutting assembly and mobile device, include: a cutting unit having at least one rotatable member engageable with the ground, the cutting unit being height adjustable relative to the frame, the cutting unit having a first cutting mode and a second cutting mode; a four-bar linkage connecting the cutting unit to the frame body; and the length adjusting assembly is hinged with the frame body at one end, and is connected to the frame body at the other end through a connecting member and is configured to adjust the length in response to the height change of the cutting assembly relative to the frame body. According to the mobile equipment, the cutting unit is provided with the first cutting mode and the second cutting mode through the length adjusting assembly and the rotatable member capable of being jointed with the ground, so that the mobile equipment provided with the cutting assembly can meet the cutting requirements on different area heights.

Description

Cutting assembly and mobile device

Technical Field

The utility model relates to a cutting assembly and mobile device belongs to garden equipment.

Background

The mobile device can complete the lawn trimming work, and currently, lawn trimming (such as golf courses) usually has a low cutting area and a high cutting area, wherein the low cutting area is a fairway area, and the high cutting area is a long grass area. The existing mobile equipment can not be used for trimming a low-cutting area and a high-low cutting area, and for example, the existing mobile equipment with low cutting height (10mm) is hob cutter mobile equipment; while the rotary-knife smart mobile device cuts products with widths greater than 600MM that temporarily do not have a low cutting height (10 MM). In the existing golf course mobile devices, the rotary cutter mobile device is only responsible for a half-grass growing area and a grass growing area, and the fairway needs to be cut by using a rotary cutter mobile device additionally, so that the golf course needs to purchase two mobile devices to operate different cutting areas.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a adaptable not co-altitude cutting just can guarantee the mobile device of cutting highly uniform nature.

In order to achieve the above purpose, the utility model provides a following technical scheme: a cutting assembly connected with a frame, the cutting assembly comprising:

a cutting unit having at least one ground-engageable rotatable member, the cutting unit being height-adjustable relative to the frame, the cutting unit having a first cutting mode and a second cutting mode;

a four-bar linkage connecting the cutting unit to the frame body;

a length adjustment assembly having one end hinged with the frame body and the other end connected to the frame body through a connection member, configured to adjust a length in response to a height change of the cutting assembly with respect to the frame body.

Further, the cutting unit having a first cutting mode and a second cutting mode includes:

in the first cutting mode, the cutting unit has a first cutting height and the rotatable member of the cutting unit is separated from the ground; in the second cutting mode, the cutting unit has a second cutting height and the rotatable member is in contact with the ground.

Further, the four connecting rods comprise a first crank connecting rod, a second crank connecting rod and side connecting rods, the first crank connecting rod and the second crank connecting rod are provided with pivots attached to the frame body, one ends of the first crank connecting rod and one end of the second crank connecting rod are respectively connected to the pivots in a pivoting mode, and two ends of the side connecting rods are respectively attached to the pivots of the first crank connecting rod and the second crank connecting rod.

Further, the other end of the length adjustment assembly connected to the frame body through the connection member includes:

the other end of the length adjustment assembly is connected to the pivot shaft through the connecting member.

Further, the other ends of the first crank connecting rod and the second crank connecting rod are pivotally connected to the cutting unit.

Further, the first cutting height is 20-70mm, and the second cutting height is 10-15 mm.

Further, the rotatable member may be rotated in any direction.

Further, the cutting unit comprises at least two cutter disc assemblies with rollers attached in the direction of the reference plane of the cutting unit.

The present application further provides a mobile device having the above-mentioned cutting assembly, including:

the walking assembly is connected with the frame body and drives the cutting assembly to move;

and the cutting control system is electrically connected with the cutting assembly, and adjusts the height of the cutting unit relative to the frame body according to the obtained grass height or the received target cutting height, so that the cutting unit is switched between the first cutting mode and the second cutting mode.

Further, the cutting assembly has a reference plane attitude with respect to the magazine, and the cutting unit is configured to move from the first cutting mode to the second cutting mode while maintaining the reference plane attitude.

The beneficial effects of the utility model reside in that: the cutting unit is provided with a first cutting mode and a second cutting mode through the length adjusting assembly and the rotatable member capable of being jointed with the ground, so that the mobile equipment provided with the cutting assembly can meet the cutting requirements on different area heights.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

FIG. 1 is a cross-sectional view of a cutting assembly according to one embodiment of the present application;

fig. 2 is a schematic structural diagram of a self-moving device in a first cutting mode according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a self-moving device in a second cutting mode according to an embodiment of the present application.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 in conjunction with fig. 2, a cutting assembly 10 according to an embodiment of the present application is mounted on a mobile device 100 to cut grass within a range of movement of the mobile device 100. The mobile device 100 may be an automatically controlled mobile device 100 or a manually controlled mobile device 100, and the mobile device 100 may be equipped with other components required by the smart mower or the mobile device 100, such as a camera shooting component, in addition to the cutting component 10. The mobile device 100 generally has a cradle 20. The forward and backward directions in the following description are described in terms of the view of the cutting assembly 10 mounted on the mobile device 100, and the forward direction is the forward direction of the mobile device (the direction indicated by the arrow a in fig. 2 is the forward direction).

Referring to fig. 1 in conjunction with fig. 2, the cutting assembly 10 is connected to a frame 20. The cutting assembly 10 comprises a cutting unit 1, a four-bar linkage 2 and a length adjustment assembly 3. Wherein the cutting unit 1 has a rotatable member 11 engageable with the ground 200, the height of the cutting unit 1 is adjustable relative to the frame 20, and the cutting unit 1 has a first cutting mode (see fig. 3) and a second cutting mode (see fig. 2). The four-bar linkage 2 connects the cutting unit 1 to the frame body 20. The length adjustment assembly 3 has one end hinged to the frame 20 and the other end connected to the frame 20 by a connection member 4, and is configured to adjust the length in response to a height change of the cutting assembly 10 relative to the frame 20. The cutting unit 1 is provided with a first cutting mode and a second cutting mode through the length adjusting assembly 3 and the rotatable member 11 which can be combined with the ground 200, so that the mobile equipment 100 provided with the cutting assembly 10 can meet the cutting requirements on different area heights; and since the cutting unit 1 has the rotatable member 11 that can engage with the ground 200, the cutting unit 1 can be stabilized when the cutting assembly 10 is cutting in the second cutting mode, ensuring consistency in cutting height.

In the present embodiment, the first cutting mode and the second cutting mode of the cutting unit 1 include: in the first cutting mode, the cutting unit 1 has a first cutting height and the rotatable member 11 of the cutting unit 1 is separated from the ground 200 (fig. 3); in the second cutting mode, the cutting unit has a second cutting height and the rotatable member 11 is in contact with the ground 200 (fig. 2). That is, referring to fig. 3, when the cutting unit 1 is in the first cutting mode, the cutting unit 1 is far away from the ground 200, and is suspended for suspended cutting; when the cutting unit 1 is in the second cutting mode, see fig. 2, the cutting unit 1 is resting against the ground 200, wheel supported cutting.

Generally, the first cutting height is set to 20-70mm and the second cutting height is set to 10-15 mm. It should be noted that, in the actual golf course cutting, 20-70mm is the half-length grass zone, and 10-15mm is the fairway zone, so when the cutting assembly 10 is applied to the golf course, the cutting assembly can be freely switched between the fairway zone and the half-length grass zone, and a plurality of different grass cutters are not needed, so that the maintenance cost of the golf course is saved. Of course, in other embodiments, the first cutting height and the second cutting height may be set to other heights according to actual cutting requirements.

The cutting unit 1 includes two cutter disc assemblies 12, the two cutter disc assemblies 12 being arranged in a forward and rearward direction in the direction of advance of the moving apparatus 100. The structure of the cutter head assembly 12 adopts the prior art, and includes a cutter head 121, a cutter head 122 disposed on the cutter head 121, a cutter head driving member 123 for driving the cutter head 122 to rotate, and the like, which are not described in detail herein. In other embodiments, the number of cutter disc assemblies 12 may be three or more, or the arrangement may be triangular, as desired, depending on the actual requirements, such as when three cutter disc assemblies 12 are used.

A roller 13 is attached to the cutting unit 1 in the direction of the reference plane. The reference plane direction of the cutting unit 1 is the plane of the cutting unit 1, and is parallel to the walking surface (i.e. the ground 200) of the mobile device 100.

In order to facilitate the assembly of the two cutter disc assemblies 12 and the rollers 13, the cutting unit 1 comprises, in particular, a deck 14, and both cutter disc assemblies 12 and the rollers 13 are mounted on the deck 14. In the forward direction of the mobile device 100, the rollers 13 are located on the front side and the rear side of the deck 14, wherein the rollers 13 located on the rear side may also be referred to as guard wheels. The roller 13 is provided to have a certain width to ensure following of the floor 200 and prevent gnawing.

It should be noted that the rotatable member 11 of the present application is also mounted on the deck 14, in this embodiment, the number of the rotatable members 11 is 1, and the rotatable member 11 is arranged between the cutting unit 1 on the rear side and the roller 13 on the rear side and is disposed relatively close to the cutting unit 1 on the rear side. In other embodiments, the rotatable members 11 may be arranged on the deck 14 according to actual requirements, and the number and arrangement thereof are not limited. The rotatable member 11 and the roller 13 at the front side function together to support the deck 14 when the cutting unit 1 is in the second cutting mode, in which both the rotatable member 11 and the roller 13 are in contact with the ground 200, wherein the driven wheel support ground 200 provides maximum ground following during cutting by definition of the rotatable member 11 and the roller 13 at the front side.

The rotatable member 11 can rotate in any direction, and a universal wheel can be used. With this arrangement, when the mobile device 100 is turned, the rotatable member 11 follows the turning of the mobile device 100, reducing the resistance of the deck 14 when turning, so that the cutting assembly 10 does not need to be lifted when turning, even though the cutting assembly 10 may still cut grass during turning.

In the present embodiment, the four-bar link 2 includes a first crank link 21, a second crank link 22, and a side link 23. Wherein, the first crank connecting rod 21 and the second crank connecting rod 22 are provided with a pivot 24 attached to the frame body 20, and one end of each of the first crank connecting rod 21 and the second crank connecting rod 22 is pivotally connected to the pivot 24. The side links 23 are attached at both ends to the pivot shaft 24 of the first crank link 21 and the pivot shaft 24 of the second crank link 22, respectively. The first and second crank

links

21 and 22 are attached to the frame 20 by a pivot 24, so that the first and second crank

links

21 and 22 can pivot relative to the frame 20, and the axis direction of the pivot 24 is perpendicular to the front direction of the mobile device 100.

The other ends of the first and second crank

links

21, 22 are pivotally connected to the deck 14 of the cutting unit 1. Specifically, the first crank connecting rod 21 and the second crank connecting rod 22 are connected to the deck 14 through the chain 4, in this embodiment, the deck 14 is provided with a third crank connecting rod 15 and a fourth crank connecting rod 16, and the third crank connecting rod 15 and the fourth crank connecting rod 16 are connected to the deck 14 through a rotating shaft (not numbered). The axial direction of the shaft is the same as the axial direction of the pivot shaft 24. The chain 4 is divided into two groups, the two ends of the first group of chain 4 are respectively hinged on the first crank connecting rod 21 and the third crank connecting rod 15, and the two ends of the second group of chain 4 are respectively hinged on the second crank connecting rod 22 and the fourth crank connecting rod 16. Deck 14 is allowed to float in at least two degrees of freedom relative to frame 20 by chains 4.

Of course, in other embodiments, the chain 5 may also be a flexible member, or the first crank connecting rod 21 and the second crank connecting rod 22 may be directly connected to the deck 14 through the chain 5 or the flexible member, or the first crank connecting rod 21 and the second crank connecting rod 22 may be connected to the deck 14 through a pivoting member of another structure, as long as the deck 14 can float in at least two degrees of freedom relative to the frame body 20.

It should be noted that since the deck 14 can float in two degrees of freedom with respect to the frame 20, when the cutting unit 1 encounters resistance or external force, the cutting unit 1 can slightly move with respect to the frame 20 under the action of the external force to reduce the rigid impact between the cutting unit 1 and the frame 20, particularly when the cutting unit 1 is in the second cutting mode (fig. 2), since the rollers 13 and the rotatable member 11 walk in a snug manner, when there are obstacles or potholes such as stones on the ground 200, since the deck 14 can float with respect to the frame 20, the rigid impact can be reduced.

The specific structure of "the other end of the length-adjusting unit 3 is connected to the frame body 20 by the connecting member 4" is as follows: the other end (named second end) of the length adjustment assembly 3 is connected to the pivot shaft 24 through the connecting member 4. The connecting member 4 is a crank structure (which may be referred to as a fifth crank connecting rod 4) and is hinged with the length adjusting assembly 3. The length adjustment assembly 3 is arranged between the first and second crank

links

21, 22, and its second end is connected to the pivot 24 of the second crank link 22.

In the present embodiment, the length adjustment assembly 3 is an electric push rod 3, specifically, the electric push rod 3 includes a cylinder (not numbered) and a push rod (not numbered) protruding outwards from the cylinder, and the electric push rod 3 is a prior art and will not be described in detail. The tail end of the electric push rod 3 is hinged on the frame body 20, and the front end (or the extending end) of the electric push rod 3 is hinged with the fifth crank connecting rod 4. In other embodiments, the length adjustment assembly 3 may also adopt other devices as long as it can drive the first crank connecting rod 21 or the second crank connecting rod 22 to rotate.

It should be noted that an angle is formed between the first crank connecting rod 21 and the fifth crank connecting rod 4, the angle will not change due to the driving of the electric cylinder 3, when the electric push rod 3 pulls the fifth crank connecting rod 4 to rotate, the fifth crank connecting rod 4 drives the pivot 24 connected thereto to rotate, and the four connecting rods 2 drive the first crank connecting rod 21 and the second crank connecting rod 22 to rotate, so as to switch the cutting unit 1 between the first cutting mode (see fig. 3) and the second cutting mode (see fig. 2).

Referring to fig. 2 and 3, an embodiment of the present application provides a mobile device 100 having the cutting assembly 10, where the mobile device 100 includes a frame 20, a walking assembly and a cutting control system (not shown). In other embodiments, the mobile device 100 may be provided with other devices such as a camera in addition to the cutting assembly 10. In this embodiment, the mobile device 100 is a smart lawn mower.

The walking assembly is connected with the frame body 20 and drives the cutting assembly 10 to move so as to realize cutting in a walking area. The running assembly comprises front wheels 31 and rear wheels 32. With reference to the forward direction of the mobile device 100 (the direction indicated by the arrow a in fig. 2 and 3), the front wheel 31 is located at the front side of the rear wheel 32, and the cutting assembly 10 is located between the front wheel 31 and the rear wheel 32. The front wheels 31 are universal wheels, and the rear wheels 32 are driving wheels. When walking, the front wheels 31 and the rear wheels 32 are rotatable about respective rotation shafts (not numbered).

The cutting control system is electrically connected with the cutting assembly 10, and adjusts the height of the cutting unit 1 relative to the frame body 20 according to the obtained grass height or the received target cutting height, so that the cutting unit 1 is switched between a first cutting mode (fig. 3) and a second cutting mode (fig. 2). In this embodiment, the cutting control system controls the electric push rod 3 to move so as to switch the cutting unit 1 between the first cutting mode (fig. 3) and the second cutting mode (fig. 2).

The control mode of the cutting control system can be realized by adopting a logic circuit or adopting the existing control chip and circuit, and detailed description is not provided herein. The "grass height or received target cutting height" may be an externally generated signal or command or a signal obtained from a sensor carried on the mobile device 100 to sense the height of grass in the area being cut or about to be cut.

In the present embodiment, the cutting assembly 10 has a reference plane posture relative to the frame 20, and the cutting unit 1 is configured to move from the first cutting mode to the second cutting mode while maintaining the reference plane posture, that is, when the cutting unit 1 is in the first cutting mode, the plane thereof is the ground 200, as shown in fig. 3, and when the cutting unit 1 is in the second cutting mode, the plane thereof is parallel to the ground 200, as shown in fig. 2.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a cutting assembly, is connected with the support body, its characterized in that, cutting assembly includes:

a four-bar linkage connecting the cutting unit to the frame body;

2. The cutting assembly of claim 1, wherein the cutting unit having a first cutting mode and a second cutting mode comprises:

3. The cutting assembly of claim 1, wherein the four links include a first crank link, a second crank link, and side links, the first and second crank links having pivots attached to the frame body, the first and second crank links having one ends pivotally connected to the pivots, respectively, and the side links having two ends attached to the pivots of the first and second crank links, respectively.

4. The cutting assembly of claim 3, wherein the other end of the length adjustment assembly being connected to the frame body by the connecting member comprises:

5. The cutting assembly of claim 3, wherein the other ends of the first and second crank links are pivotally connected to the cutting unit.

6. The cutting assembly of claim 2, wherein the first cutting height is 20-70mm and the second cutting height is 10-15 mm.

7. The cutting assembly of claim 1, wherein the rotatable member is rotatable in either direction.

8. The cutting assembly of claim 1, wherein the cutting unit comprises at least two cutter disc assemblies with rollers attached in a reference plane direction of the cutting unit.

9. A mobile device having a cutting assembly as claimed in any one of claims 1 to 8, comprising:

10. The mobile device of claim 9, wherein the cutting assembly has a reference plane attitude relative to the mount, the cutting unit being configured to move from the first cutting mode to the second cutting mode each maintaining the reference plane attitude.