CN218897541U - Grass mowing head and grass mowing machine - Google Patents

Abstract

The utility model relates to the technical field of grass mowers, in particular to a grass mowing head and a grass mowing machine, wherein the grass mowing head comprises a mounting frame, a first driving device, a grass mowing device and a detecting device, and the first driving device is arranged on the mounting frame; the grass mowing device is arranged on a driving shaft of the first driving device, is provided with a grass mowing rope and can release the grass mowing rope so as to increase the length of the grass mowing rope; the detection device is arranged on the mounting frame and can move close to or far away from the driving shaft, and the detection device is used for detecting the length of the straw beating rope. According to the grass cutting head and the grass cutting machine, the detection device is arranged and can move close to or far away from the driving shaft of the first driving device, so that when the grass cutting rope cannot be detected, the detection device can move a certain distance to the driving shaft and detect the grass cutting rope again until the grass cutting rope is detected, the detection accuracy is improved, the detection range is enlarged, the problem of frequent paying-off of the paying-off device is solved, and the grass cutting efficiency is improved.

Description

Grass mowing head and grass mowing machine

Technical Field

The utility model relates to the technical field of grass mowers, in particular to a grass mowing head and a grass mowing machine.

Background

Grass cutters are becoming increasingly popular with many users as a garden tool for grass disposal. The grass trimmer typically trims grass by driving the grass trimmer rope in rotation, the grass trimmer rope being disposed within the working head and extending a free end that performs rotary cutting in response to high speed rotation of the grass trimmer head. Because the grass mowing rope rotates to mow grass, the tail end of the grass mowing rope is easy to abrade, the abraded grass mowing rope cannot reach the required grass mowing radius, and the grass mowing efficiency is greatly reduced. Therefore, the grass trimmer is provided with the paying-off mechanism and the detection device so as to adjust the length of the grass trimming rope extending out of the grass trimming head at a proper time.

The detection device in the prior art is arranged on the rotating path of the grass mowing rope, and when the grass mowing rope touches the detection device or passes through the detection device, the length of the grass mowing rope can be detected to be a preset value. However, when a short abrasion occurs at the tail end of the grass beating rope, the grass beating rope can not be detected by the detection device, and then the paying-off mechanism is triggered to pay off, so that the problem that the paying-off mechanism pays off frequently occurs, and the grass beating efficiency is affected.

Disclosure of Invention

The utility model provides a grass cutting head and a grass cutting machine, which can solve the problem of frequent paying-off of a paying-off device and improve grass cutting efficiency.

In order to solve the technical problems, one technical scheme adopted by the embodiment of the utility model is as follows: the grass cutting head comprises a mounting frame, a first driving device, a grass cutting device and a detection device, wherein the first driving device is arranged on the mounting frame; the grass mowing device is arranged on a driving shaft of the first driving device, is provided with a grass mowing rope and can release the grass mowing rope so as to increase the length of the grass mowing rope; the detection device is arranged on the mounting frame and can move close to or far away from the driving shaft, and the detection device is used for detecting the length of the grass mowing rope.

In some embodiments, the mounting frame is provided with a first chute extending in a first direction; the detection device comprises a sliding block and a sensor, wherein the sliding block is arranged in the first sliding groove in a sliding mode, and the sensor is arranged in the sliding block.

In some embodiments, a sliding rib extending along the first direction is disposed in the first sliding groove, and a second sliding groove is formed in the sliding block and is in sliding fit with the sliding rib.

In some embodiments, the sliding ribs are disposed on two opposite side walls of the first sliding groove along the second direction, and the second sliding groove is disposed on two opposite sides of the sliding block along the second direction.

In some embodiments, the device further comprises a second driving device, wherein the second driving device is arranged on the mounting frame and is in transmission connection with the detection device, and the second driving device is used for driving the detection device to move close to or far away from the driving shaft.

In some embodiments, the device further comprises a cutting member disposed on the detecting device and configured to cut the mowing cord.

In some embodiments, the detection device is provided with a connection seat, the connection seat is provided with a connection groove, and the cutting member is installed in the connection groove.

In some embodiments, the connecting seat is provided with a first connecting hole penetrating through the connecting groove, the cutting member is provided with a second connecting hole, the grass mowing head further comprises a connecting member, and the connecting member penetrates through the first connecting hole and the second connecting hole.

In some embodiments, the mounting frame includes a first housing and a second housing, the second housing is disposed in the first housing, a housing cavity is defined between the second housing and the first housing, and the housing cavity is used for placing an electronic component.

The other technical scheme adopted by the embodiment of the utility model is as follows: there is provided a grass trimmer comprising a grass trimmer head as claimed in any one of the preceding claims.

Different from the situation of the related art, the grass cutting head and the grass cutting machine provided by the embodiment of the utility model are provided with the detection device, and the detection device can move close to or far away from the driving shaft of the first driving device, so that when the grass cutting rope cannot be detected, the detection device can move a distance to the driving shaft and detect the grass cutting rope again until the grass cutting rope is detected, the detection accuracy is improved, the detection range is enlarged, the problem of frequent paying-off of the paying-off device is solved, and the grass cutting efficiency is improved.

Drawings

FIG. 1 is a schematic view of a grass cutting head according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a grass cutting head of an embodiment of the present utility model;

FIG. 3 is a schematic view of the first drive arrangement and the grass cutting device of FIG. 1;

FIG. 4 is an exploded view of the mounting bracket and second drive assembly of FIG. 3;

fig. 5 is an exploded view of the sensing assembly, cutting member and connector of fig. 3.

Reference numerals in the specific embodiments are as follows:

100. grass cutting head;

1. a mounting frame; 11. a first housing; 111. an extension; 112. a first chute; 113. a sliding rib; 12. a second housing;

2. a first driving device; 21. a drive shaft;

3. a grass mowing device; 31. beating grass ropes;

4. a detection device; 41. a slide block; 411. a second chute; 42. a sensor; 43. a connecting seat; 431. a connecting groove; 432. a first connection hole;

5. a second driving device; 51. a driving rod;

6. a cutting member; 61. a second connection hole;

7. and a connecting piece.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

In the description of the present utility model, it should be noted that, orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these orientation words do not indicate or imply that the apparatus or elements being referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present utility model, it should be noted that, the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, so they should not be construed as limiting the scope of the present utility model. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

In order to solve the above technical problems, as shown in fig. 1 to 3, an embodiment of the present utility model provides a grass cutting head 100, where the grass cutting head 100 includes a mounting frame 1, a first driving device 2, a grass cutting device 3, a detecting device 4, a second driving device 5, a cutting member 6, and a connecting member 7, where the mounting frame 1 is used for mounting the first driving device 2, the detecting device 4, and the second driving device 5; the first driving device 2 is used for driving the grass cutting device 3 to rotate so as to perform grass cutting operation; the grass cutting device 3 is provided with a grass cutting rope 31 for cutting grass, and the grass cutting rope 31 can be released to increase the length of the grass cutting rope 31; the detecting device 4 is used for detecting the length of the grass rope 31 and can move close to or far away from the driving shaft 21 of the first driving device 2; the second driving device 5 is used for driving the detecting device 4 to move close to or away from the driving shaft 21; the cutting member 6 is used for cutting the grass cutting rope 31 to shorten the length of the grass cutting rope 31; the connector 7 is used to fasten the cutting member 6 to the detection device 4.

Next, the specific structures of the above-described mount 1, first driving device 2, grass mowing device 3, detecting device 4, second driving device 5, cutting member 6, and connecting member 7 will be described in order.

For the above-mentioned mounting bracket 1, as shown in fig. 1, the first end of the mounting bracket 1 is used for installing the first driving device 2, the second end is used for installing the detecting device 4, and the connection line between the first end and the second end is perpendicular to the driving shaft 21 of the first driving device 2, so that the detecting device 4 is located at one side of the first driving device 2 along the direction perpendicular to the driving shaft 21, and the detecting device 4 can detect the length of the grass mowing rope 31 thrown out by the grass mowing device 3. Optionally, the first driving device 2 is mounted on the mounting frame 1 through screws. Alternatively, as shown in fig. 3, the mounting frame 1 has an "L" shape.

As shown in fig. 3 and 4, the mounting rack 1 includes a first housing 11 and a second housing 12, the second housing 12 is disposed on the first housing 11, a receiving cavity is defined between the second housing 12 and the first housing 11, and the receiving cavity is used for placing electronic components, for example, a control chip and the second driving device 5 may be placed.

As shown in fig. 3 and 4, along the direction from the first end toward the top end second end, the first housing 11 includes an extension portion 111 protruding from the second housing 12, the extension portion 111 is provided with a first sliding groove 112, the first sliding groove 112 extends along the first direction, the first sliding groove 112 may also be disposed at another position of the mounting frame 1, and the first sliding groove 112 is used for slidably mounting the detecting device 4. Further, a sliding rib 113 extending along the first direction is disposed in the first sliding groove 112, and is configured to cooperate with the detecting device 4, so as to improve the sliding stability of sliding the detecting device 4. Optionally, the sliding ribs 113 are disposed on two opposite side walls of the first sliding groove 112 along the second direction, so that the sliding ribs 113 can limit the position of the detecting device 4 in the first sliding groove 112, and prevent the detecting device 4 from being separated from the first sliding groove 112 along the depth direction of the first sliding groove 112. Optionally, along the extending direction of the first sliding groove 112, the sum of the length of the sliding rib 113 and the length of the sliding block 41 is smaller than the length of the first sliding groove 112, and one end of the sliding rib 113 is flush with one end of the first sliding groove 112, so that the detecting device 4 can slide in the first sliding groove 112 to be separated from the sliding rib 113, so that the detecting device 4 is convenient to separate from the first sliding groove 112.

As shown in fig. 1, the first driving device 2 is disposed on one side of the mounting frame 1, and the driving shaft 21 of the first driving device 2 passes through the mounting frame 1 and extends out of the other side of the mounting frame 1, so that the grass cutting device 3 and the main body portion of the first driving device 2 are respectively disposed on two sides of the mounting frame 1, and the shake amplitude of the grass cutting device 3 relative to the mounting frame 1 is reduced; and shorten drive arrangement with the distance of grass device 3, thereby shorten detection device 4 to the length of the extension of grass device 3 reduces detection device 4 with the moment that the junction of mounting bracket 1 received improves detection device 4 installs. Optionally, the first driving device 2 is a motor.

As shown in fig. 1, the grass cutting device 3 is disposed on the driving shaft 21 of the first driving device 2, the grass cutting device 3 is provided with a grass cutting rope 31, and the grass cutting device 3 is driven by the first driving device 2 to rotate, so that the grass cutting rope 31 rotates around the driving shaft 21 at a high speed, thereby cutting the grass. The grass cutting device 3 can also release the grass cutting rope 31 to increase the length of the grass cutting rope 31 after the grass cutting rope 31 becomes worn and shortened, so as to ensure the grass cutting radius of the grass cutting rope 31. Optionally, the grass cutting device 3 is fixed to the driving shaft 21 of the first driving device 2 by screws.

As shown in fig. 3 and 5, for the above-mentioned detection device 4, the detection device 4 is disposed on the mounting frame 1, the detection device 4 includes a slider 41 and a sensor 42, the slider 41 is slidably disposed in the first chute 112, the sensor 42 is disposed on the slider 41 so as to slide along the first chute 112 along with the slider 41, thereby moving closer to or farther from the driving shaft 21 of the first driving device 2, the sensor 42 is configured to detect the length of the mowing rope 31 and record the length of the mowing rope 31, and when the length of the mowing rope 31 is lower than a preset value, send a paying-off instruction to the mowing device 3 to enable the mowing device 3 to release the mowing rope 31; when the detecting component still cannot detect the grass mowing rope 31 after moving along the first sliding groove 112 for a whole course, the paying-off instruction is sent to the grass mowing device 3. Further, the sliding block 41 is provided with a second sliding groove 411, and the second sliding groove 411 is slidably matched with the sliding rib 113, so as to improve the sliding stability of the sliding block 41, and further improve the moving stability of the sensor 42 relative to the mounting frame 1. Optionally, the second sliding grooves 411 are disposed on two opposite sides of the sliding block 41 along the second direction, so as to limit the position of the sliding block 41 in the first sliding groove 112, and prevent the sliding block 41 from being separated from the first sliding groove 112 along the depth direction of the first sliding groove 112. Alternatively, the sensor 42 is a pressure sensor 42 or a micro switch, and the sensor 42 is triggered when the string 31 contacts the sensor 42 or indirectly applies pressure to the sensor 42.

As shown in fig. 5, the detecting device 4 is provided with a connecting seat 43, the connecting seat 43 is provided with a connecting groove 431, the cutting member 6 is mounted in the connecting groove 431, and the cutting member 6 can move along the first sliding groove 112 along with the sliding block 41, so that the grass cutting rope 31 can be cut, and the grass cutting rope 31 with different lengths can be cut along with the movement of the cutting member 6 to different positions. And when the cutting member 6 is hit by the grass rope 31, vibration or pressure can be transmitted to the sensor 42 to trigger the sensor 42. Optionally, the sensor 42 is disposed in the slider 41. Optionally, the connection seat 43 is disposed on the slider 41.

As shown in fig. 5, the connection seat 43 is provided with a first connection hole 432 penetrating the connection groove 431, the cutting member 6 is provided with a second connection hole 61, and when the cutting member 6 is mounted in the connection groove 431, the connecting member 7 is inserted into the first connection hole 432 and the second connection hole 61 to fix the cutting member 6 in the connection groove 431. And when the cutting member 6 is severely worn and the straw rope 31 cannot be cut normally, the cutting member 6 can be replaced by detaching the connecting member 7, so that the disassembly and assembly are convenient. Alternatively, the cutting member 6 is a blade and the connecting member 7 is a pin.

As shown in fig. 3 and 4, the second driving device 5 is disposed on the mounting frame 1 and is in transmission connection with the detecting device 4, and the second driving device 5 is configured to drive the detecting device 4 to move closer to or farther from the driving shaft 21. Specifically, the second driving device 5 is disposed in the accommodating cavity, and the driving rod 51 of the second driving device 5 extends out of the accommodating cavity and is connected with the sliding block 41, so as to drive the sliding block 41 to slide along the first sliding groove 112. Further, the driving rod 51 of the second driving device 5 is detachably connected with the slider 41 through a pin, so as to facilitate the installation of the slider 41. Alternatively, the second driving device 5 is a linear driver, and the driving rod 51 can reciprocate along its own axial direction.

The second driving device 5 is in an operating mode: the second driving device 5 is started once every a period of time, and drives the detecting device 4 to approach the driving shaft 21 of the first driving device 2 until the detecting device 4 detects the grass mowing rope 31, or the detecting device 4 moves to a position closest to the driving shaft 21 along the first sliding groove 112 (i.e. the detecting component does not detect the grass mowing rope 31 in the whole running process along the first sliding groove 112); then, the second driving device 5 drives the detecting device 4 to be far away from the driving shaft 21 until the detecting device 4 moves to the farthest position along the first sliding groove 112; finally, the second detecting device 4 is stopped and waits for the next starting.

The embodiment of the utility model also provides a grass trimmer, which comprises the grass trimmer head 100, and the grass trimmer has the structure and the beneficial effects of the grass trimmer head 100, and is not repeated here.

The grass cutting head 100 and the grass cutting machine of the embodiment of the utility model are provided with the detection device 4, and the detection device 4 can move close to or far away from the driving shaft 21 of the first driving device 2, so that when the grass cutting rope 31 cannot be detected, the detection device can move a certain distance to the driving shaft 21 and detect the grass cutting rope again until the grass cutting rope 31 is detected, thereby improving the detection accuracy, expanding the detection range, improving the problem of frequent paying-off of the paying-off device and improving the grass cutting efficiency; be provided with cutting member 6, can cut the rope 31 of beating grass, make the length of rope 31 of beating grass reach preset length, and cutting member 6 set up in detection component 4, can follow detection component 4 synchronous motion can cut out the rope 31 of beating grass of different length.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims (10)

1. A grass cutting head, comprising:

a mounting frame;

the first driving device is arranged on the mounting frame;

the paying-off device is arranged on the driving shaft of the first driving device, is provided with a grass beating rope and can release the grass beating rope so as to increase the length of the grass beating rope; and

the detection device is arranged on the mounting frame and can move close to or far away from the driving shaft, and the detection device is used for detecting the length of the grass mowing rope.

2. A grass cutting head as claimed in claim 1, wherein the mounting frame is provided with a first runner extending in a first direction; the detection device comprises a sliding block and a sensor, wherein the sliding block is arranged in the first sliding groove in a sliding mode, and the sensor is arranged in the sliding block.

3. The grass cutting head of claim 2, wherein a sliding rib extending along the first direction is disposed in the first sliding groove, and a second sliding groove is formed in the sliding block and is in sliding fit with the sliding rib.

4. A grass cutting head as claimed in claim 3, wherein the slide bar is provided on opposite side walls of the first runner in the second direction, and the second runner is provided on opposite sides of the slider in the second direction.

5. A grass cutting head as claimed in claim 1, further comprising a second drive means provided in the mounting frame and in driving connection with the detection means, the second drive means being arranged to drive the detection means to move closer to or farther from the drive shaft.

6. The grass cutting head of claim 1, further comprising a cutting member disposed on the detection device and configured to cut the grass cutting rope.

7. A grass cutting head as claimed in claim 6, wherein the detection means is provided with a connector seat provided with a connecting slot in which the cutting member is mounted.

8. The grass cutting head of claim 7, wherein the connector has a first connecting hole extending through the connecting slot, the cutting member has a second connecting hole, and the grass cutting head further includes a connector extending through the first and second connecting holes.

9. A grass cutting head as claimed in any one of claims 1 to 8, wherein the mounting frame includes a first housing and a second housing, the second housing being provided to the first housing, a receiving chamber being defined between the second housing and the first housing, the receiving chamber being for receiving an electronic component.

10. A grass trimmer comprising a grass trimmer head as claimed in any one of claims 1 to 9.

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