阅读说明：本技术 切割机构的防护机构，切割机构与防护机构的组合 (Protection mechanism of cutting mechanism, combination of cutting mechanism and protection mechanism ) 是由 冉沅忠 杜江 孙云红 于 2015-10-13 设计创作，主要内容包括：本发明涉及一种割草机,包括：切割机构,用以执行切割作业；机身,设置有：侧部防护,位于切割机构的侧方,以在所述切割机构的侧方建立防护屏障；底部防护,位于所述切割机构的下方,以在所述切割机构的下方建立防护屏障,其中所述底部防护上开设有进草口。上述割草机,侧部防护可以防止人体自切割机构的侧方接触到切割机构,底部防护可以防止人体自切割机构的下方接触到切割机构,且底部防护上设有进草口,使切割能够顺利进行,底部防护的设置还使得侧部防护与切割机构可以设置为尽可能的靠近割草机的外侧,从而实现对草坪边缘的切割,由此能同时满足切割和安全要求。(The invention relates to a lawn mower comprising: a cutting mechanism for performing a cutting operation; the fuselage is provided with: the side protection is positioned at the side of the cutting mechanism so as to establish a protection barrier at the side of the cutting mechanism; the bottom protection is positioned below the cutting mechanism so as to establish a protection barrier below the cutting mechanism, wherein the bottom protection is provided with a grass inlet. Above-mentioned lawn mower, the lateral part protection can prevent that the human body from cutting mechanism's side from contacting cutting mechanism, and the bottom protection can prevent that the human body from cutting mechanism's below from contacting cutting mechanism, and is equipped with into grass mouthful on the protection of bottom, makes the cutting go on smoothly, and the setting up of bottom protection still makes lateral part protection and cutting mechanism set up to be close to the outside of lawn mower as far as to the realization is to the cutting at lawn edge, can satisfy cutting and safety requirement simultaneously from this.)

1. A protection mechanism of a cutting mechanism, the cutting mechanism can be connected with a machine body of an intelligent mower for executing cutting operation, and is characterized in that,

protection machanism includes that the lateral part protects and the bottom protects, wherein:

the side protection is positioned at the side of the cutting mechanism so as to establish a protection barrier at the side of the cutting mechanism;

the bottom protection is positioned below the cutting mechanism so as to establish a protection barrier below the cutting mechanism, wherein the bottom protection is provided with a grass inlet.

2. Guard means according to claim 1 characterised in that the cutting means is eccentrically disposed beneath the fuselage, offset to one side of the fuselage, the offset of the side and bottom guards coinciding with the offset of the cutting means.

3. The guard mechanism of claim 1, wherein the length of the bottom guard is greater than or equal to a cutting diameter of the cutting mechanism.

4. Guard means according to claim 1, characterised in that the side of the bottom guard facing away from the cutting means is arranged in an arc projecting relative to the cutting means.

5. The protection mechanism of claim 1, wherein the grass inlet is a strip-shaped gap, and an angle between the opening direction of the strip-shaped gap and the advancing direction of the intelligent mower ranges from 0 degree to 45 degrees.

6. The guard mechanism of claim 5, wherein the width of the grass inlet perpendicular to the direction of advance of the smart mower is less than 13 mm.

7. Guard mechanism according to claim 1, characterised in that the cutting element of the cutting mechanism is less than 20mm away from the outermost side of the fuselage.

8. Guard means according to claim 1, characterised in that the bottom guard and the side guards are integrated.

9. The protection mechanism of claim 1, wherein the intelligent lawn mower further comprises a control module and a walking module, the control module and the walking module are disposed on the machine body, the walking module drives the intelligent lawn mower to walk and turn, the control module is electrically connected to the walking module to control the walking module to work, and the control module is electrically connected to the cutting mechanism to control the cutting mechanism to perform cutting operation.

10. The guard mechanism of claim 1, wherein the control module controls the smart mower to travel along a predetermined boundary line.

11. A combination of a cutting mechanism and a guard mechanism, the combination being connectable to the body of a smart lawn mower, comprising a cutting mechanism for performing cutting operations and a side guard and a bottom guard as claimed in any one of claims 1 to 10.

Technical Field

The invention relates to an electric garden tool, in particular to a mower.

Background

With the continuous progress of computer technology and artificial intelligence technology, intelligent mowers similar to intelligent robots have started to walk slowly into people's lives. The intelligent mower can automatically mow and charge the lawn of the user without user interference. After the automatic working system is set once, the user is freed from tedious and time-consuming and labor-consuming housework such as cleaning, lawn maintenance and the like without being invested in energy management.

In order to reduce the walking resistance caused by the friction between the grass surface and the machine body, the bottom end of the machine body of the intelligent mower is away from the ground by a certain distance, and the distance enables the feet of a person to extend below the machine body and be close to a knife strip serving as a cutting element. To ensure human safety, the smart lawn mower has to place the outermost side of the cutting element at a large distance, e.g., greater than 80mm, from the outer side wall of the fuselage. In this way, the cutting element is not accessible even if a human foot is inserted below the fuselage. Due to the arrangement mode, the intelligent mower can never cut the lawn which is about 80mm away from the outermost side of the working area, the lawn still needs manual maintenance, and the use experience of the intelligent mower is greatly reduced.

Disclosure of Invention

Based on this, there is a need to provide a lawn mower that meets both cutting and safety requirements.

A lawn mower, comprising:

a cutting mechanism for performing a cutting operation;

the fuselage is provided with:

the side protection is positioned at the side of the cutting mechanism so as to establish a protection barrier at the side of the cutting mechanism;

the bottom protection is positioned below the cutting mechanism so as to establish a protection barrier below the cutting mechanism, wherein the bottom protection is provided with a grass inlet.

Above-mentioned lawn mower, the lateral part protection can prevent that the human body from cutting mechanism's side from contacting cutting mechanism, and the bottom protection can prevent that the human body from cutting mechanism's below from contacting cutting mechanism, and is equipped with into grass mouthful on the protection of bottom, makes the cutting go on smoothly, and the setting up of bottom protection still makes lateral part protection and cutting mechanism set up to be close to the outside of lawn mower as far as to the realization is to the cutting at lawn edge, can satisfy cutting and safety requirement simultaneously from this.

In one embodiment, the grass inlet is a strip-shaped gap, and the angle between the opening direction of the strip-shaped gap and the advancing direction of the mower ranges from 0 degree to 45 degrees.

In one embodiment, the width of the grass inlet in the direction perpendicular to the advancing direction of the mower is less than 13 mm.

In one embodiment, the cutting element of the cutting mechanism is less than 20mm from the outermost side of the fuselage.

In one embodiment, a side of the bottom guard facing away from the cutting mechanism is arranged in an arc shape protruding with respect to the cutting mechanism.

In one embodiment, the cutting mechanism is eccentrically disposed below the fuselage, biased to one side of the fuselage, and the side guards and bottom guard are biased to coincide with the bias of the cutting mechanism.

In one embodiment, more than 2 cutting mechanisms are arranged, wherein the more than 2 cutting mechanisms are deviated to the same side of the machine body; or more than 2 cutting mechanisms are arranged, and the two sides of the machine body are provided with the offset cutting mechanisms.

In one embodiment, the cutting mechanism is movably connected to the body, and the side guard and the bottom guard move together with the cutting mechanism.

In one embodiment, the cutting mechanism is capable of extending beyond the contour of the fuselage.

In one embodiment, the body includes a movable member movably disposed relative to the remainder of the body, and the cutting mechanism, the side guard and the bottom guard are each coupled to the movable member.

In one embodiment, the mower further comprises a driving mechanism capable of driving the movable part to move, and the movable part drives the cutting mechanism to move when moving.

In one embodiment, the driving mechanism drives the movable part to rotate or slide, and the movable part drives the cutting mechanism to rotate or slide when moving.

In one embodiment, the driving mechanism comprises a worm wheel connected with the movable part, a worm matched with the worm wheel, and a motor driving the worm to rotate, and when the motor drives the worm to rotate, the worm wheel drives the movable part to rotate around the axis of the worm wheel.

In one embodiment, an elastic element is further arranged on the machine body, and the elastic element is compressed when the cutting mechanism is subjected to pressure and provides elastic force for driving the movable part to drive the cutting mechanism to return after the pressure disappears.

In one embodiment, the elastic element is a torsion spring or a compression spring.

In one embodiment, the cutting mechanism comprises: a cutting motor mounted to the movable member; the cutter head is connected to a shaft of the cutting motor; a cutting element disposed on the cutter disc.

In one embodiment, the side guards extend in a height direction of the fuselage, the bottom guard extends in a direction perpendicular to the height direction, and the cutting element is operative to have a cutting zone extending in a direction perpendicular to the height direction.

In one embodiment, the mower further comprises a walking module and a control module, wherein the walking module is arranged on the mower body and drives the mower to walk and turn, the control module is electrically connected with the walking module to control the walking module to work, and the control module is electrically connected with the cutting mechanism to control the cutting mechanism to perform cutting operation.

In one embodiment, the control module controls the mower to walk along a preset boundary line.

In one embodiment, the length of the bottom guard is greater than or equal to the cutting diameter of the cutting mechanism.

In one embodiment, the bottom shield and the side shield are integrally connected.

In one embodiment, the cutting element of the cutting mechanism has an adjustable height on the machine body, and the side guard and the bottom guard both lift and fall with the cutting element.

Drawings

FIG. 1 is a schematic view of a mower according to an embodiment;

FIG. 2 is a schematic top view of the mower;

FIG. 3 is a schematic cross-sectional view of a lawn mower;

FIG. 4 is a perspective view of the mower;

FIG. 5 is a schematic view of a grass inlet on the bottom guard;

FIG. 6 is a schematic view of the mower cutting to accommodate a lateral obstacle shape;

fig. 7 is a schematic view of the lawn mower cutting to conform to the shape of the ground.

The relevant elements in the figures are numbered correspondingly as follows:

100. mower 110, body 112 and control module

114. Movable part 120, walking module 122 and front wheel

124. Rear wheel 126, traveling motor 130, cutting mechanism

132. Cutting motor 134, cutter head 136, cutting elements

1362. Cutting area 140, drive mechanism 142, worm gear

144. Worm 146, motor 150, side guard

160. Bottom guard 162, grass inlet 170, outer shroud

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

The following description of the preferred embodiments of the lawn mower refers to the accompanying drawings.

Referring to fig. 1 and 2, a lawn mower 100 according to an embodiment of the present invention includes a main body 110, a traveling module 120, and a cutting mechanism 130.

The traveling module 120 includes front wheels 122, rear wheels 124, and a traveling motor 126 disposed on the body 110 and driving the rear wheels 124 to advance. The front wheels 122 and the rear wheels 124 constitute a wheel group. The front wheel 122 has one, and is located at the front end of the body 110. The rear wheels 124 are 2 and symmetrically arranged at both sides of the rear end of the body 110. Of course, a single rear wheel may be used instead of a pair of rear wheels. Likewise, a single front wheel may be replaced with a pair of front wheels. As shown in fig. 1 and 2, from right to left, is the forward direction of the mower 100. Meanwhile, the forward direction of the lawn mower 100 is also the direction from the rear end to the front end of the lawn mower 100.

The lawn mower 100 of the present invention is an intelligent lawn mower. Referring to fig. 1, a control module 112 is disposed on the body 110. The control module 112 is electrically connected to the walking module 120 for controlling the mower 100 to walk; and is electrically connected to the cutting mechanism 130 for controlling the operation of the cutting mechanism 130. The control module 112 can control the mower to travel along a predetermined boundary line to perform trimming.

The cutting mechanism 130 is disposed under the body 110 for performing a cutting operation. In the present invention, the cutting mechanism 130 performs eccentric cutting. Specifically, referring to fig. 1, the central line a is the central axis of the machine body 110, and the central line B is the central axis of the cutting mechanism 130. The center line B is not coincident with the center line a but is disposed on one side of the center line a, i.e., on the right side in fig. 1, and the cutting mechanism 130 is eccentrically disposed below the body 110, which is offset to the right side of the body 110. In this way, the cutting mechanism 130 can be as close to the outer side of the body 110 as possible, so that the lawn at the boundary of the working area can be cut, i.e. trimming to the edge can be effectively realized, and manual trimming is avoided.

A cutting mechanism 130 is provided in the present invention. However, the cutting mechanisms 130 may be provided in number of 2 or more, and each may be eccentrically provided to perform eccentric cutting. Further, all of the cutting mechanisms 130 may be offset to the same side of the body 110. It can also be: both sides of the body 110 have offset cutting mechanisms. If there are 2 cutting mechanisms 130, the central axes of the two cutting mechanisms are located on the left and right sides of the central axis of the main body 110, respectively, thereby expanding the operation range of the lawn mower 100.

The cutting mechanism 130 is movably disposed with respect to the body 110 to be capable of adapting to the shape of an obstacle at the boundary line of the cutting zone, thereby realizing follow-up when encountering an obstacle. Specifically, the main body 110 is provided with a movable member 114 movably disposed with respect to the other portions of the main body 110. A cutting mechanism 130 is attached to the movable member 114. The movable part 114 can drive the cutting mechanism 130 to move when moving. Alternatively, when the cutting mechanism 130 is subjected to an external force to change its position, the movable member 114 can be caused to change its position accordingly.

In the present invention, the body 110 is provided with a driving mechanism 140 for driving the movable member 114 to move. The driving mechanism 140 is operative to drive the movable member 114 to move, and the movable member 114 drives the cutting mechanism 130 to move, such as rotate or slide. In fig. 2, the cutting mechanism 130 is rotatable relative to the body 110.

When cutting the boundary of a complex working condition, for example, as shown in fig. 6, a wall or other obstacle is located at the boundary of the cutting working area, at this time, a sensing detection element arranged in the control module 112 detects the shape of the obstacle in real time, and then sends an instruction to the driving mechanism 140, so that the driving mechanism 140 drives the movable part 114 to rotate, and when the movable part 114 rotates, the cutting mechanism 130 can be driven to rotate left and right to enable the mower 100 to advance, and the cutting mechanism 130 can adapt to the shape of the obstacle. The cutting mechanism 130 is configured to extend beyond the contour of the body 110 to extend the cutting range of the mower 100 as needed to ensure cutting of complex work boundary without leaving grass residue.

In addition, the cutting mechanism 130 may follow the obstacle in real time, or may not be provided with a driving mechanism. For example, a resilient element may be provided directly between the cutting mechanism 130 and the body 110. The elastic member is compressed when the cutting mechanism 130 is pressurized, and provides an elastic force for returning the cutting mechanism 130 after the pressure is removed. Thus, in a normal state, the cutting mechanism 130 is in its position of maximum cutting capacity under the action of the elastic element, and can cut grass in a more edgewise position. When the mower 100 is advanced along an obstacle, the cutting mechanism 130 moves away from the boundary if it is subjected to pressure imparted by the boundary lawn or obstacle during advancement. After the pressure is removed, the elastic member urges the cutting mechanism 130 to return. Therefore, the cutting mechanism 130 can move according to the shape of the obstacle, the cutting of the complex working condition boundary is guaranteed, and grass is not left.

The resilient member may be a torsion spring that allows the cutting mechanism 130 to rotate or slide. The elastic member may be a resilient member such as a compression spring, which allows the cutting mechanism 130 to slide.

Referring to fig. 7, the cutting height of the mower 100 of the present invention can be adjusted in real time to accommodate different terrain. The cutting height can be changed by adjusting the relative position of the body 110 and the wheel set to change the height of the body 110 from the ground. This may also be accomplished by varying the height of the cutting mechanism 130 above the body 110.

Referring to fig. 1 and 3, the cutting mechanism 130 includes: a cutter motor 132, a cutter disc 134, and cutting elements 136.

The cutting motor 132 is mounted to the movable member 114. The movable member 114 serves as a motor support. The movable member 114 is offset to the right of the body 110 such that the axis of the shaft of the cutting motor 132 is disposed to the right of the central axis of the body 110. The cutter head 134 has a disk shape and is connected to the shaft of the cutter motor 132. When the cutter motor 132 is operated, the cutter disc 134 is driven to rotate. The cutting elements 136 are provided in plural numbers, and are arranged uniformly in the circumferential direction of the cutter disc 134. Cutting element 136 is a cutting blade. As the movable member 114 changes position, it moves the cutting motor 132, cutter disc 134, and cutting elements 136 together.

When the drive mechanism 140 is configured to adjust the position of the cutting mechanism 130 to accommodate boundary cuts of different conditions, the drive mechanism 140 changes the position of the cutting mechanism 130 by driving the movable member 114. The driving mechanism 140 is mounted on the body 110.

In one example, referring to fig. 2, the drive mechanism 140 includes a worm gear 142 coupled to the movable member 114, a worm 144 engaged with the worm gear 142, and a motor 146 driving the rotation of the worm 144. When the motor 146 drives the worm 144 to rotate, the worm wheel 142 drives the movable part 114 to rotate around the axis of the worm wheel 142. In fig. 2, two positions C and D of the cutting mechanism 130 are illustrated.

However, the drive mechanism may be other types of transmission, such as in other examples, the drive mechanism 140 may be a gear, rack mechanism.

When an elastic member is provided to provide the cutting mechanism 130 with the ability to conform to the shape of the boundary obstacle, the elastic member may be provided between other portions of the body 110 and the movable member 114 on the body 110. As mentioned above, the elastic element may be a torsion spring or a common compression spring, or other elastic element.

In the present invention, the cutting mechanism 130 performs an eccentric cut, which is offset below the body 110. Thus, the cutting mechanism 130 is closer to the outside of the body 110.

To this end, referring to fig. 3 and 4, the body 110 is further provided with a side guard 150 located outside the cutting mechanism 130 to establish a protective barrier from the side of the cutting mechanism 130. The side guard 150 extends in the height direction (i.e., vertical direction) of the body 110, and prevents a human body from contacting the cutting element 136 of the cutting mechanism 130 from the side of the lawn mower 100, thereby preventing injury.

In addition, the bottom of the body 110 of the lawn mower 100 may be located a distance from the ground, and the bottom of the body of the intelligent lawn mower may be located a distance from the ground, which allows a person's feet or hands to reach under the body 110 and close to a blade or the like as a cutting element. As an intelligent lawnmower, the one that automatically operates in a cruising manner in a predetermined boundary area without human operation is known. Although the side guard 150 described above may to some extent prevent body tissue from protruding from the side of the mower 100 below the body 110 and near the cutting element. However, the side guard 150 described above still has certain drawbacks for passers-by who may curiously extend their fingers and toes under the fuselage 110.

To this end, the lawn mower 100 is also provided with a bottom guard 160 to establish a protective barrier from below the cutting mechanism 130. Cutting region 1362 of cutting element 136 extends in a horizontal direction. The bottom guard 160 is provided to extend below the cutting mechanism 130 in a direction (horizontal direction) perpendicular to the height direction of the body 110. The bottom guard 160 is positioned below the cutting region 1362 of the cutting element 136 of the cutting mechanism 130 to create a guard between the cutting mechanism 130 and the ground to completely avoid the possibility of human tissue becoming dangerous once it has been inserted beneath the body 110.

The side guard 150 and the bottom guard 160 are offset to one side of the body 110 on the body 110, and the offset is consistent with the offset of the cutting mechanism 130.

Referring to fig. 5, the bottom guard 160 is provided with a grass inlet 162. The grass inlet 162 is a strip-shaped gap, and the angle between the opening direction of the strip-shaped gap and the advancing direction of the mower 100 is 0-45 degrees. In other words, the opening direction of the grass inlet 162 may be arbitrarily set within a range of 45 degrees of left-right deflection with the advancing direction as an axis. Therefore, during the cutting process, the grass is pressed while the bottom guard 160 moves forwards, and the pressed grass has a natural recovery tendency, so that when the grass inlet 162 moves to the pressed grass, the pressed grass can enter the cutting range of the cutting element 136 along the grass inlet 162 and can be cut smoothly, and the grass is not easy to block.

When the grass inlet 162 is a strip-shaped slit, the width of the grass inlet is less than 13mm in the direction perpendicular to the advancing direction of the mower 100, so as to prevent fingers from contacting the cutting element 136 through the grass inlet 162 after extending below the body 110. It should be noted that the width of the grass-feeding opening 162 is not limited to this, since the width is not the only factor (e.g., length) that determines whether the finger can enter the grass-feeding opening. However, if the width is sized as above, it is not necessary to consider other factors to prevent the entry of normal sized fingers and toes into the grass inlet 162 that may be present in the working area of the mower 100.

The shape and the opening direction of the grass inlet 162 are not limited to the above preferred embodiments, and the opening direction of the grass inlet 162 may be at an angle to the advancing direction. For another example, in the present invention, the grass inlet 162 is a slit, and the bottom guard 160 is in the shape of a fence. The grass inlet 162 may be provided in other shapes, such as a net structure, an irregular structure, etc.

The side of the bottom guard 160 facing away from the cutting mechanism 130 is configured in an arc shape protruding relative to the cutting mechanism 130. In other words, the side of the bottom guard 160 opposite the ground is curved. Thus, during the advancing process of the mower 100, the bottom guard 160 is not easily inserted into the ground in the working area, and the cutting is ensured to be smoothly performed.

The bottom guard 160 can prevent a human body from contacting the cutting mechanism 130 after extending below the body 110, and the grass inlet 162 formed in the bottom guard 160 enables the cutting to be smoothly performed. While the side guard 150 and the cutting mechanism 130 may be arranged as close to the outside of the mower 100 as possible, in particular, the cutting element 136 of the cutting mechanism is less than 20mm from the outermost side of the body 110, thereby achieving cutting of the lawn edge while meeting cutting and safety requirements.

The length of the bottom guard 160 is set to be greater than or equal to the cutting diameter of the cutting mechanism 130, preventing a person from contacting the cutting elements 136 of the cutting mechanism 130 after passing over the bottom guard 160. In addition, the bottom guard 160 and the side guard 150 are integrally connected, which is advantageous for reducing the assembling process, and on the other hand, the bottom guard 160 and the side guard 150 have no gap therebetween, so that the human body is prevented from entering the working area of the cutting element 136 from the gap therebetween.

The cutting element 136 of the cutting mechanism 130 is height adjustable on the body 110 while the side guards 150 and the bottom guard 160 both lift and lower with the cutting element 136. Specifically, the side shield 150 and the bottom shield 160 are both supported by the movable member 114. Thus, the movement of the movable member 114 can bring the side shield 150 and the bottom shield 160 to move together. The side guard 150 and the bottom guard 160 are movable with the cutting mechanism 130. Thus, when the cutting mechanism 130 rotates, slides or moves up and down relative to the body 110, the side guard 150 and the bottom guard 160 can move together with the cutting mechanism to perform a guard function. Also, the relative positional relationship between the side guards 150 and the bottom guard 160 and the cutting elements 136 of the cutting mechanism 130 is fixed and need not be adjusted each time.

The side shield 150 and the bottom shield 160 may be fixed to the body 110 and fixed in position. The side guard 150 and the bottom guard 160 may be movably disposed at other positions of the body 110, and do not move along with the cutting mechanism 130, as long as they are adjusted along with the cutting mechanism 130 each time.

In the present invention, the cutting mechanism 130 is located below the body 110 and within the outline of the body 110. It should be noted that the cutting mechanism 130 may be positioned wholly or partially outside the contour of the fuselage 110. Due to the side guards 150 and the bottom guard 160, the cutting elements 136 of the cutting mechanism 130 are still not touched by the person from the sides and bottom, preventing injury.

Referring to fig. 3, an outer shroud 170 is also provided outside the fuselage 110 for safety protection purposes. The outer shroud 170 covers the body 110 and the cutting mechanism 130 to protect the body 110 and the cutting mechanism 130 from above and also to prevent damage.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.