CN117461460A - Lawn trimmer - Google Patents

Abstract

This application discloses a lawnmower. The lawnmower includes: a front-end mechanism, including a mowing component; a rear-end mechanism, including an energy source device for providing an energy source; a connecting rod device, connecting the front-end mechanism and the rear-end mechanism; Adjustment device for adjusting the pitch angle of the mowing assembly relative to the connecting rod device. Wherein, the adjustment device includes: an operating member, including an operating part for a user to operate to adjust the pitch angle; and a driving component, connecting the operating member and the mowing assembly so that the operating member changes the pitch angle of the mowing assembly when operated. Wherein, the connecting rod device includes a connecting rod extending at least partially along the first linear direction, and the distance between the operating part and the rear end of the lawn mower in the first linear direction is greater than or equal to 0 and less than or equal to 700 mm. The lawn trimmer can be operated more conveniently by the user.

Description

Lawn trimmer

Technical field

The present application relates to a garden tool, specifically a lawnmower and a pole tool.

Background technique

As a lawn care device, a lawn trimmer is usually used to repair lawns and trim grass under shrubs or equipment. However, when trimming some low shrubs or grass under facilities, the trimmer needs to extend the trimming rope under the middle shrubs or facilities, so the pitch angle of the trimming head in the trimmer needs to be adjusted. . The related trimmer is inconvenient to operate when adjusting the pitch angle of the trimming head.

This section provides background information relevant to the present application that is not necessarily prior art.

Contents of the invention

An object of the present application is to solve or at least alleviate some or all of the above problems. To this end, one object of the present application is to provide a lawn mower that is user-friendly.

In order to achieve the above goals, this application adopts the following technical solutions:

A lawn mower includes: a front-end mechanism, including a mowing component; a rear-end mechanism, including an energy source device for providing an energy source; a connecting rod device, connecting the front-end mechanism and the rear-end mechanism; and an adjustment device, used to adjust the mowing machine. The pitch angle of the grass assembly relative to the connecting rod device. Wherein, the adjustment device includes: an operating member, including an operating part for a user to operate to adjust the pitch angle; and a driving component, connecting the operating member and the mowing assembly so that the operating member changes the pitch angle of the mowing assembly when operated. Wherein, the connecting rod device includes a connecting rod extending at least partially along the first linear direction, and the distance between the operating part and the rear end of the lawn mower in the first linear direction is greater than or equal to 0 and less than or equal to 700 mm.

In some embodiments, the length of the connecting rod device can be changed. When the connecting rod device is in the longest state, the distance between the operating part and the rear end of the lawn mower is greater than or equal to 0 along the first linear direction. And less than or equal to 700 mm.

In some embodiments, the connecting rod device includes a first end connected to the front end mechanism and a second end connected to the rear end mechanism, and the distance from the operating part to the first end is greater than or equal to 200 mm.

In some embodiments, the connecting rod device includes a first end connected to the front end mechanism and a second end connected to the rear end mechanism, and the distance from the operating part to the second end is less than or equal to 400 mm.

In some embodiments, when the mowing assembly is in the state with the smallest pitch angle, the maximum distance between the operating part and the front end of the mowing machine along the first linear direction is greater than or equal to 300 mm.

In some embodiments, the operating member is mounted to the connecting rod device and is spaced a predetermined distance from the front end mechanism.

In some embodiments, the lawnmower further includes a main handle for the user to hold, and the distance between the operating part and the main handle along the first linear direction is less than or equal to 400 mm.

In some embodiments, the connecting rod device includes a first end connected to the front end mechanism and a second end connected to the rear end mechanism, and the distance between the operating part and the first end is equal to the distance between the operating part and the second end. The ratio is greater than or equal to 0.8 and less than or equal to 3.

In some embodiments, when operated, the operating member can rotate relative to the connecting rod device about a first axis, and the first axis is substantially perpendicular to the first linear direction.

In some embodiments, the lawn mower further includes an auxiliary handle for the user to hold, and the auxiliary handle forms or is connected to the operating member.

In some embodiments, when the operating member is operated, it can rotate about the first axis relative to the connecting rod device. The lawn mower further includes an auxiliary handle for the user to hold. When the operating member rotates relative to the connecting rod device about the first axis, , the position of the auxiliary handle relative to the connecting rod device remains unchanged.

In some embodiments, the driving assembly includes: a first transmission member connected to the operating member, a second transmission member connected to the mowing assembly, and a connecting member connecting the first transmission member and the second transmission member.

In some embodiments, the distance between the first transmission member and the second transmission member is greater than or equal to 200 mm and less than or equal to 800 mm.

In some embodiments, the connector is a flexible member.

In some embodiments, the connecting member is a rigid member.

In some embodiments, the connector is at least partially disposed within the connecting rod.

In some embodiments, the driving assembly includes: a motor that drives the pitch angle of the grass trimming assembly to change.

In some embodiments, the lawn mower further includes a main handle for user operation, and the main handle is configured to rotate around a first straight line relative to the front-end mechanism.

In some embodiments, the lawnmower further includes a main handle for user operation, and the main handle is configured to be able to rotate around a first straight line relative to the entirety composed of the connecting rod device and the front-end mechanism.

In some embodiments, the front-end mechanism further includes a drive motor for driving the lawn mowing assembly to implement the mowing function, and the driving assembly drives the entire pitch angle formed by the drive motor and the mowing assembly to change.

A lawn mower includes: a front-end mechanism including a mowing component for mowing grass; a connecting rod device with a front-end mechanism installed on the front end; and an adjusting device used to adjust the pitch angle of the mowing component relative to the connecting rod device. The adjustment device includes: an operating part, including an operating part for a user to operate to adjust the pitch angle; the operating part is installed to the connecting rod device and spaced apart from the front end mechanism by a first preset distance.

In some embodiments, the lawnmower further includes a rear-end mechanism provided at the rear end of the connecting rod device, and the operating member is provided between the front-end mechanism and the rear-end mechanism.

In some embodiments, the operating member is spaced apart from the rear end mechanism by a second preset distance.

In some embodiments, the ratio of the first preset distance to the second preset distance is greater than or equal to 1.5 and less than or equal to 8.

In some embodiments, the adjustment device further includes a driving assembly connecting the operating member and the mowing assembly so that the operating member changes the pitch angle of the mowing assembly when the operating member is operated.

In some embodiments, the drive assembly is at least partially disposed within the connecting rod arrangement.

In some embodiments, the operating member is also formed or connected with a limiting member for limiting the pitch angle of the grass cutting assembly to a preset angle.

In some embodiments, the operating member is configured to rotate relative to the connecting rod device around the first axis direction to adjust the pitch angle of the grass trimming assembly, and the operating member is further configured to release the restriction of the limiting member when rotating around the first axis.

In some embodiments, the operating member is configured to rotate relative to the connecting rod device about the first axis direction to adjust the pitch angle of the grass trimming assembly.

A lawn mower, including: a front-end mechanism, including a mowing assembly; a rear-end mechanism, including an energy source device that provides an energy source; a connecting rod device, connecting the front-end mechanism and the rear-end mechanism; and an adjustment device, used to adjust the mowing assembly Pitch angle relative to the connecting rod device. Wherein, the adjustment device includes: an operating member, including an operating part for a user to operate to adjust the pitch angle; and a driving component, connecting the operating member and the mowing assembly so that the operating member changes the pitch angle of the mowing assembly when operated. Wherein, the connecting rod device includes a connecting rod extending at least partially along a first straight line direction. In the first straight line direction, the distance between the operating part and the rear end of the lawn mower is the same as the distance between the lawn mower and the rear end of the lawn mower along the first straight line. The ratio of the lengths in the directions is greater than or equal to 0.1 and less than or equal to 0.8.

A lawnmower, including: a front-end mechanism, including a mowing component for mowing grass; a connecting rod device, the front-end mechanism is installed on the front end, and the connecting rod device includes a connecting rod extending at least partially along a first linear direction; a main handle, Connected to the connecting rod device, the main handle includes a main grip portion for the user to hold, and the main handle is configured to rotate relative to the front end mechanism about a first straight line to realize the lawn trimmer between the mowing mode and the trimming mode. Switch; the limit component includes a limit member for limiting the main handle to a preset position when the main handle rotates relative to the mowing assembly around a first straight line; the limit component is configured to limit the main handle to a preset position when the main handle rotates around a first straight line. The limit state is changed when the first straight line is rotated.

In some embodiments, the change of the limiting state of the limiting component is achieved by rotating the main handle around the first straight line.

In some embodiments, the limiting assembly further includes a biasing element that generates a biasing force that biases the limiting member.

In some embodiments, the limiting assembly further includes a fitting part that cooperates with the limiting piece to limit the main handle to a preset position, and the limiting assembly further includes a biasing force that can generate a biasing force that makes the limiting piece cooperate with the fitting part. element.

In some embodiments, when the main handle rotates relative to the grass trimming assembly around the first straight line, the limiting member is disengaged from the mating portion.

In some embodiments, the fitting portion is a groove, and the limiting member is a movable element that can be driven by the biasing element and inserted into the groove.

In some embodiments, the movable element is a pin or ball.

In some embodiments, the stopper is connected to the main handle, and the mating portion is a groove or protrusion connected to the connecting rod device.

In some embodiments, the main handle is formed with a receiving hole, the biasing element is disposed in the receiving hole, and the limiting member is at least partially disposed in the receiving hole.

In some embodiments, the stopper is connected to the connecting rod device, and the mating portion is a groove or protrusion connected to the main handle.

A rod type tool, including: a front-end mechanism, including functional components for realizing the function of the tool; a connecting rod device, the front-end mechanism is installed on the front end, and the connecting rod device includes a connecting rod extending at least partially along a first straight direction; a main handle, Connected to the connecting rod device, the main handle includes a main grip portion for the user to hold. The main handle is configured to rotate relative to the front end mechanism around a first straight line to achieve changes in the working angle of the functional component; the limiting component includes The limiting member is used to limit the main handle to the preset position when the main handle rotates relative to the functional component around the first straight line to the preset position. The limiting component is configured to change the limiting state when the main handle rotates around the first straight line.

In some embodiments, the change of the limiting state of the limiting component is achieved by rotating the main handle around the first straight line.

In some embodiments, the limiting assembly further includes a biasing element that generates a biasing force that biases the limiting member.

In some embodiments, the limiting assembly further includes a fitting part that cooperates with the limiting piece to limit the main handle to a preset position, and the limiting assembly further includes a biasing force that can generate a biasing force that makes the limiting piece cooperate with the fitting part. element.

In some embodiments, when the main handle rotates relative to the functional component about the first straight line, the limiting member is disengaged from the mating portion.

In some embodiments, the fitting portion is a groove, and the limiting member is a movable element that can be driven by the biasing element and inserted into the groove.

In some embodiments, the movable element is a pin or ball.

In some embodiments, the stopper is connected to the main handle, and the mating portion is a groove or protrusion connected to the connecting rod device.

In some embodiments, the main handle is formed with a receiving hole, the biasing element is disposed in the receiving hole, and the limiting member is at least partially disposed in the receiving hole.

In some embodiments, the stopper is connected to the connecting rod device, and the mating portion is a groove or protrusion connected to the main handle.

The advantage of this application is that the lawn trimmer allows the user to adjust the pitch angle of the lawn trimming assembly more conveniently, and the user does not get his hands dirty during operation.

Description of the drawings

Figure 1 is a perspective view of a lawn trimmer in an inclined cutting mode according to an embodiment;

Figure 2 is a plan view of the lawnmower in Figure 1;

Figure 3 is a first cross-sectional view of the lawnmower in Figure 2;

Figure 4 is a second cross-sectional view of the lawn mower in Figure 2;

Figure 5 is a plan view of a lawnmower according to one embodiment, wherein the energy source device includes a plug;

Figure 6 is a plan view of the lawnmower in Figure 1 when it is in a horizontal cutting mode;

Figure 7 is a perspective view of the lawn mower in Figure 6 after the main handle is rotated 90 degrees;

Figure 8 is a perspective view of the lawnmower in Figure 1 when it is in trimming mode;

Figure 9 is a plan view of a lawn mower according to an embodiment, in which the operating member and the auxiliary handle are provided separately;

Figure 10 is an exploded view of the adjustment device and front-end mechanism of the lawn mower in Figure 1;

Figure 11 is another perspective view of the structure shown in Figure 10;

Figure 12 is a perspective view of part of the adjustment device in Figure 10;

Figure 13 is another perspective view of the structure shown in Figure 12;

Figure 14 is a perspective view of part of the operating parts and mounting parts in Figure 12;

Figure 15 is another perspective view of the structure shown in Figure 14;

Figure 16 is a perspective view of the lawnmower in Figure 1 when the rear end mechanism is separated from the connecting rod device;

Figure 17 is an enlarged view of part of the area in Figure 16;

Figure 18 is a partial exploded view of the rear end mechanism of the lawn mower in Figure 1;

Figure 19 is another perspective view of the structure shown in Figure 18;

Figure 20 is a perspective view of a lawn mower according to another embodiment;

Figure 21 is a plan view of the lawnmower shown in Figure 20;

Figure 22 is a cross-sectional view of the lawn mower in Figure 20;

Figure 23 is an enlarged view of part of the adjustment device and part of the connecting rod of the lawn mower in Figure 20;

Figure 24 is a perspective view of the operating member and auxiliary handle in Figure 23, in which the second locking part is in a state of being separated from the first locking part;

Figure 25 is a perspective view of the structure shown in Figure 24 when the second locking part is in a state of mating with the first locking part;

Fig. 26 is a partial enlarged view of the structure shown in Fig. 22.

Implementation

Before any embodiments of the present application are explained in detail, it is to be understood that this application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

In this application, the terms "comprises," "comprises," "having," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element.

In this application, the term "and/or" is an association relationship describing associated objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the related objects are an "and/or" relationship.

In this application, the terms "connection", "combination", "coupling" and "installation" may mean direct connection, combination, coupling or installation, or indirect connection, combination, coupling or installation. Among them, for example, direct connection means that two parts or components are connected together without the need for middleware, and indirect connection means that two parts or components are connected to at least one middleware respectively. These two parts Or components are connected through middleware. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

In this application, one of ordinary skill in the art will understand that relative terms (eg, "about," "approximately," "substantially," etc.) used in connection with quantities or conditions are to include the stated value and have the meaning indicated by the context. For example, this relative term includes at least the degree of error associated with the measurement of a specific value, tolerances resulting from manufacturing, assembly, use, etc. associated with the specific value. Such terms should also be considered to disclose a range defined by the absolute values of both endpoints. Relative terms may refer to the addition or subtraction of a certain percentage (eg, 1%, 5%, 10% or more) of the indicated value. Numerical values, not in relative terms, should also be disclosed as specific values with tolerances. In addition, when expressing relative angular position relationships (for example, basically parallel, basically perpendicular), "basic" can refer to adding or subtracting a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) to the indicated angle. More).

In this application, those of ordinary skill in the art will understand that a function performed by a component may be performed by one component, multiple components, one part, or multiple parts. Likewise, the function performed by a part can also be performed by a part, a component, or a combination of parts.

In this application, the terms "upper", "lower", "left", "right", "front", "back" and other azimuthal terms are used to describe the orientation and positional relationship shown in the drawings, and should not be used. It should be understood as a limitation on the embodiments of this application. Additionally, it should be understood in this context that when an element is referred to as being connected "on" or "under" another element, it can not only be directly connected "on" or "under" the other element, but also can be directly connected "on" or "under" the other element. Indirectly connected "on" or "below" another element through an intermediate element. It should also be understood that positional words such as upper side, lower side, left side, right side, front side, and back side not only represent the front direction, but can also be understood as the side direction. For example, the lower part may include the right lower part, the lower left part, the lower right part, the lower part of the front part, the lower part of the back part, etc.

The lawn trimmer 100 shown in FIG. 1 is a garden tool operated by a user to trim lawns or weeds in a garden. Alternatively, the lawn trimmer 100 can also trim lawns or weeds in other bushes. In the embodiment shown in FIG. 1 , the lawn mower 100 is equipped with a mowing rope 100 a. When the lawn mower 100 is started, the mowing rope 100 a can be driven to rotate at a high speed to cut grass. In other embodiments, the lawn mower 100 can also be equipped with a blade, and when the lawn mower 100 is started, the blade can be driven to rotate to cut grass.

As shown in FIG. 1 , the lawn mower 100 includes: a front-end mechanism 11 , a rear-end mechanism 12 and a connecting rod device 13 . The front-end mechanism 11 includes a mowing assembly 111 for realizing the mowing function. The rear-end mechanism 12 includes an energy source device 121 that can provide an energy source. The connecting rod device 13 connects the front-end mechanism 11 and the rear-end mechanism 12 .

For convenience of explanation, the end of the connecting rod device 13 connected to the front end mechanism 11 is defined as the front, and the end of the connecting rod device 13 connected to the rear end mechanism 12 is defined as the rear.

As shown in Figures 1 and 2, the front end mechanism 11 is provided at the front end of the connecting rod device 13, and the mowing assembly 111 can be installed with a mowing rope 100a to drive the mowing rope 100a to rotate at high speed. It can be understood that the mowing assembly 111 can also be equipped with a blade to drive the blade to rotate. The rear end mechanism 12 is installed to the rear end of the connecting rod device 13. In this embodiment, the energy source device 121 may include a battery pack 121a. The battery pack 121a is used to provide power to the lawn trimmer 100. It can be understood that in other embodiments, as shown in FIG. 5 , the energy source device 121 may include a plug 121b for connecting to the mains or a connection line 121c of other power supply devices. Alternatively, in other embodiments, the energy source device 121 may include a container for containing fuel, such as gasoline, diesel, etc.

The connecting rod device 13 includes a connecting rod 131 that at least partially extends along the first straight line 101 direction. In this embodiment, the entire connecting rod 131 extends along the first straight line 101 direction. It can be understood that in other embodiments, the connecting rod 131 may partially extend along the first straight line 101 and partially extend in a direction different from the first straight line 101 .

As shown in FIGS. 1 to 4 , the lawn trimmer 100 further includes an adjustment device 20 for adjusting the pitch angle A of the lawn trimmer assembly 111 . By adjusting the pitch angle A of the grass cutting assembly 111, the user can cut grass under shrubs with different heights, which is especially convenient for cutting grass under low shrubs or under some facilities. As shown in Figures 1 to 4, the lawn mower 100 is in a normal mowing state at this time, and the pitch angle A at this time is greater than 0 degrees. Preferably, the pitch angle A can be greater than or equal to 20 degrees and less than or equal to 60 degrees. In this embodiment, it is defined that the lawn mower 100 is in the inclined cutting mode at this time. At this time, the direction of the first straight line 101 extended by the connecting rod 131 is inclined relative to the ground. It can be understood that by operating the adjustment device 20 , the user can put the lawn trimmer 100 into an inclined cutting mode with different pitch angles A. As shown in Figure 2, the pitch angle is the angle between the first straight line 101 and the plane where the ground is located.

As shown in Figures 2 and 6, the user can also reduce the pitch angle A to the state shown in Figure 6 by operating the adjustment device 20. At this time, the pitch angle A is basically 0 degrees. At this time, the connecting rod 131 extends for the first time. The straight line 101 is substantially parallel to the ground, so that the lawnmower 100 can be operated to reach under low shrubs or benches and other facilities to cut grass. It can be understood that the state of the lawn trimmer 100 shown in FIG. 6 can be defined as a horizontal cutting mode.

Of course, in order to cut shrubs of different heights or grass under facilities, the user can adjust the pitch angle A to vary between the maximum pitch angle and 0 degrees. Alternatively, the user can adjust the change of the pitch angle A according to his or her height or operating habits.

The adjustment device 20 includes: an operating member 21 and a driving assembly 22. The operating member 21 is operated by the user to adjust the pitch angle A. The driving assembly 22 connects the operating member 21 and the mowing assembly 111, so that when the user operates the operating member 21, The driving component 22 can drive the mowing component 111 to move to change the pitch angle A. In this embodiment, the operating member 21 includes an operating part 211 for user operation, and the distance L1 between the operating part 211 and the rear end of the lawn trimmer 100 is greater than or equal to 0 and less than or equal to 700 mm. It can be understood that, as shown in FIG. 5 , considering that the energy source device 121 includes a flexible connection line 121 c, in the lawn mower 100 shown in FIG. 5 , the distance between the operating part 211 and the rear end of the lawn mower 100 is The distance L1 does not take into account the length of the connecting line 121c.

In this embodiment, the distance L1 between the operating part 211 and the rear end of the lawn mower 100 can be measured when the pitch angle A is an arbitrary value A. Similarly, other distances in this application can be measured when the lawnmower 100 is at any selected pitch angle A unless otherwise specified.

In this way, the operating member 21 is disposed between the front end mechanism 11 and the rear end mechanism 12, so that the user can conveniently operate the operating member 21 without getting his hands dirty. Moreover, the structure of the front-end mechanism 11 can be simplified, and the weight of the front-end mechanism 11 can be reduced, making the balance of the whole machine better.

In this embodiment, the part of the lawn mower 100 when the battery pack 121a is not installed is defined as the main body, and the distance L2 between the operating part 211 and the rear end of the main body is greater than or equal to 0 and less than or equal to 650 mm. In this way, the operating member 21 is further away from the front end of the lawnmower 100. Not only can the user operate the operating member 21 to adjust the pitch angle A of the lawn mowing assembly 111 without bending over, but the user can also operate the operating member 21 with his hands. The user's hands do not need to touch the front-end mechanism 11, so that the user's hands will not be soiled by grass or soil on the front-end mechanism 11.

In some embodiments, the distance L1 between the operating part 211 and the rear end of the lawn mower 100 is greater than or equal to 0 and less than or equal to 600 mm. In this way, the user can trigger the operating part 21 without moving his hands, which improves work efficiency.

Or, in some embodiments, the distance L1 between the operating part 211 and the rear end of the lawn mower 100 is greater than or equal to 300 mm and less than or equal to 600 mm. In this way, the user can not only operate the lawn mower 100 to mow grass, but also conveniently operate the adjustment device. 20.

In this embodiment, the operating member 21 is installed to the connecting rod device 13, and the operating member 21 is spaced apart from the front end mechanism 11 by a first preset distance L3, and the first preset distance L3 is greater than 0. In this way, the grass clippings and soil generated during the lawn mowing process of the lawn mower 100 will stick to the front-end structure and will not stick to the operating member 21 . In some embodiments, the first preset distance L3 is greater than or equal to 200 millimeters. In some embodiments, the first preset distance L3 is greater than or equal to 350 millimeters.

In this implementation, the ratio of the distance L1 between the operating part 211 and the rear end of the lawn mower 100 to the length L4 of the lawn mower 100 along the first straight line 101 is greater than or equal to 0.1 and less than or equal to 0.8. In this way, for the entire lawn mower 100 In terms of operation, the position of the operating member 21 is set reasonably, which is more convenient for users to operate. In some embodiments, the ratio of the distance L1 between the operating part 211 and the rear end of the lawnmower 100 to the length L4 of the lawnmower 100 along the first straight line 101 is greater than or equal to 0.25 and less than or equal to 0.6.

It can be understood that in some other embodiments, the length of the connecting rod device 13 can change, that is to say, the connecting rod 131 can be a telescopic rod that can change along the direction of the first straight line 101, and the telescopic tube is in the telescopic process. The lawn trimmer 100 is implemented to have different lengths. In this embodiment, when the connecting rod device 13 is in the longest state, the distance L1 between the operating part 211 and the rear end of the lawn mower 100 in the direction along the first straight line 101 is greater than or equal to 0 and less than or equal to 700. mm, in this way, not only the convenience of user operation is considered, but also the convenience of operation of the lawn trimmer 100 in different length states is considered. In this application, for the lawn mower 100 in which the connecting rod 131 is a telescopic rod, the distance between the two parts may be measured when the telescopic rod is extended to its longest state.

As shown in Figures 3 and 4, the connecting rod device 13 includes a first end 131a connected to the front end mechanism 11 and a second end 131b connected to the rear end mechanism 12. The first end 131a is disposed in front of the second end 131b. In this embodiment, the distance L5 from the operating part 211 to the first end 131a of the connecting rod device 13 is greater than or equal to 200 mm. In this way, the distance between the operating part 211 and the front end mechanism 11 can be made more reasonable. When the grass trimmer 100 is trimming grass, the grass will not stick to the operating part 21 installed there as much as possible, ensuring the cleanliness of the operating part 21. In some embodiments, the distance L5 from the operating part 211 to the first end 131a of the connecting rod device 13 is greater than or equal to 400 mm, which can further ensure the cleanliness of the operating part 21 and facilitate the user's operation of the operating part. twenty one.

The distance L6 between the operating part 211 and the second end 131b of the connecting rod device 13 is less than or equal to 400 mm. This can keep the operating part 211 as far away from the front-end mechanism 11 as possible, and also ensure the clean end of the operating part 21. In some embodiments, the distance L6 from the operating part 211 to the second end 131b of the connecting rod device 13 is less than or equal to 300 mm, which can further ensure the cleanliness of the operating part 21 and facilitate the user's operation of the operating part. twenty one. In some embodiments, the ratio of the distance L5 between the operating part 211 and the first end 131a to the distance L6 between the operating part 211 and the second end 131b is greater than or equal to 0.8 and less than or equal to 3, so that the operating part 211 is on the connecting rod. The position setting on the device 13 is more reasonable.

As shown in FIG. 6 , the lawn mower 100 is in the horizontal cutting mode with the minimum pitch angle A. At this time, in the direction along the first straight line 101 , the maximum distance L7 between the operating part 211 and the front end of the lawn mower 100 is greater than It is equal to 300 mm, so that it is convenient for the user to operate the operating member 21 to adjust the pitch angle A of the grass trimming assembly 111.

Specifically, the lawn mower 100 also includes a main handle 122. The main handle 122 is provided with a trigger 122a. The user holds the main handle 122 and operates the trigger 122a to start the lawn mower 100 for mowing. In this embodiment, the rear end mechanism 12 includes a rear housing 123, which can detachably install the battery pack 121a. The rear housing 123 is also integrally formed with the main handle 122. In this embodiment, the main handle 122 is part of the rear end mechanism 12 . It can be understood that in other embodiments, the main handle 122 can also be provided separately from the rear housing 123 , and there is a certain distance between the main handle 122 and the rear housing 123 .

As shown in FIGS. 6 to 8 , the main handle 122 can rotate around the first straight line 101 relative to the front end mechanism 11 . Specifically, in this embodiment, the main handle 122 is configured to be able to rotate in the direction of the first straight line 101 relative to the whole body composed of the connecting rod device 13 and the front end mechanism 11 . As shown in FIG. 6 , the lawn trimmer 100 is in the horizontal cutting mode. At this time, the user can hold the main handle 122 and rotate the main handle 122 in the direction of the arrow to the position shown in FIG. 7 . As shown in Figure 7, the main handle 122 rotates 90 degrees around the first straight line 101. At this time, the main handle 122 rotates from a downward state to a left-facing state. Then the user puts the lawn trimmer 100 in a state with the main handle 122 facing downward, that is, the state shown in FIG. 8 . At this time, the user can operate the lawn trimmer 100 to perform trimming work, and the lawn trimmer 100 is in the trimming mode. Specifically, the user can operate the lawn mower 100 to cut the grass on the cement roadside. In this embodiment, if the user needs to switch the lawn trimmer 100 from the tilt cutting mode to the trimming mode, the user can first operate the adjustment device 20 to switch the lawn trimming assembly 111 to the horizontal cutting mode, and then operate the main handle 122 to rotate 90 degrees. , at this time, the user holds the main handle 122, and the mowing rope 100a extends in the vertical direction. Among them, the inclined cutting mode and the horizontal cutting mode are both defined as the mowing modes of the lawn trimmer 100 .

In this embodiment, the distance L8 between the operating part 211 and the main handle 122 is less than or equal to 400 mm. In this way, when the user holds the main handle 122 with one hand and does not move it, the other hand can easily trigger the operating part 211.

In this embodiment, when operated, the operating member 21 can rotate relative to the connecting rod device 13 around the first axis 102 , and the first axis 102 is substantially perpendicular to the direction of the first straight line 101 . It can be understood that in other embodiments, the axis of rotation of the operating member 21 may also be inclined relative to the first straight line 101 . It can be understood that in other embodiments, the operating member 21 can also be configured to slide relative to the connecting rod device 13 .

As shown in Figures 1 to 8, the lawn trimmer 100 also includes an auxiliary handle 23. When the user operates the lawn trimmer 100 to trim grass, the user holds the main handle 122 with one hand and the auxiliary handle 23 with the other hand. Hold the lawn trimmer 100 with both hands for more stable operation. In this embodiment, the auxiliary handle 23 is connected to or forms the above-mentioned operating member 21 . More specifically, the auxiliary handle 23 is integrally formed with the operating member 21 , and a part of the auxiliary handle 23 serves as the operating member 21 . In other words, in this embodiment, the auxiliary handle 23 is the operating member 21 , and the operating member 21 is the auxiliary handle 23 . It can be understood that in other embodiments, the auxiliary handle 23 and the operating member 21 can also be formed separately, but they are connected, which not only facilitates the user to selectively operate the auxiliary handle 23 and the operating member 21, but also reduces the size of the connecting rod device 13 space required to install the auxiliary handle 23 and the operating member 21. Alternatively, in other embodiments, as shown in FIG. 9 , the operating member 31 can also be provided separately from the auxiliary handle 33 , and the operating member 31 and the auxiliary handle 33 are respectively installed at different positions of the connecting rod device 32 , so that when the operating member 31 When the state changes, the position or state of the auxiliary handle 33 relative to the connecting rod device 32 remains unchanged. That is to say, in FIG. 9 , the auxiliary handle 33 does not change as the state of the operating member 31 changes. In this way, even when the position of the operating member 31 changes, the auxiliary handle 33 is still in a state that is convenient for the user to operate. In FIG. 9 , specifically, when the user causes the operating member 31 to rotate relative to the connecting rod device 32 around the first axis, the position of the auxiliary handle 33 relative to the connecting rod device 32 remains unchanged. That is to say, at this time, the auxiliary handle 33 It will not rotate around the first axis.

As shown in FIGS. 10 to 13 , the driving assembly 22 is at least partially disposed in the connecting rod device 13 . The driving assembly 22 includes: a first transmission member 221 , a second transmission member 222 and a connecting member 223 . The first transmission member 221 is connected to the operating member 21 to be driven by the operating member 21 to move. The second transmission member 222 is connected to the grass trimming assembly 111 to drive the grass trimming assembly 111 to change the pitch angle A of the grass trimming assembly 111 . The connecting member 223 connects the first transmission member 221 and the second transmission member 222 to realize power transmission between the first transmission member 221 and the second transmission member 222 . When the user operates the operating member 21, the operating member 21 rotates around the first axis 102. The rotating operating member 21 drives the first transmission member 221 to move. The connecting member 223 transmits the movement of the first transmission member 221 to the second transmission member 222. The second transmission member 222 is driven to move, and the moving second transmission member 222 drives the mowing assembly 111 to move. In this embodiment, the distance L9 between the first transmission member 221 and the second transmission member 222 is greater than or equal to 200 mm and less than or equal to 800 mm.

In this embodiment, the driving assembly 22 is at least partially disposed in the connecting rod 131, so that the appearance of the lawn trimmer 100 can be made simpler and space can be saved. Specifically, the first transmission member 221 is partially disposed in the connecting rod 131. The first transmission member 221 is a transmission wheel. The operating member 21 includes a first mounting portion 212. The first mounting portion 212 is formed with a first transmission hole 212a. A transmission member 221 is formed or connected with a first transmission part 221a that cooperates with the first transmission hole 212a, and the first transmission part 221a is inserted into the first transmission hole 212a. In this way, when the operating member 21 rotates, through the cooperation between the first transmission hole 212a and the first transmission part 221a, the operating member 21 can drive the first transmission member 221 to rotate around an axis parallel to the first axis 102. The connecting member 223 is a flexible member connected to the first transmission member 221, and the flexible member is a wire rope. The connecting member 223 includes two steel wire ropes. One end of each steel wire rope is connected to the first transmission member 221 and the other end is connected to the second transmission member 222 . In other embodiments, the connecting member may also be a rigid member, such as a rigid long rod, through which power transmission between the first transmission member and the second transmission member is achieved. The second transmission member 222 is also a transmission wheel. The transmission wheel may be disposed outside the connecting rod 131 to be connected to the front-end mechanism 11 . The front-end mechanism 11 includes a front-end mounting member 112 for installing the second transmission member 222 . In this embodiment, the mowing assembly 111 includes a mowing head 111a, a front-end housing 111b, and a driving motor 111c. The driving motor 111c can be a motor. The motor is at least partially disposed in the front-end housing 111b. The motor is connected to the mowing head 111a. The mowing head 111a is driven to rotate around the second axis 103. The front end housing 111b is used to install the driving motor 111c and connect with the trimming head 111a. The front end housing 111b includes or is connected to a second mounting portion 111d that forms a second transmission hole 111e. The second transmission member 222 forms or is connected to a second transmission portion 222a that can be inserted into the second transmission hole 111e. In this way, when the second transmission member 222 rotates, through the cooperation of the second transmission part 222a and the second transmission hole 111e, the second transmission member 222 can drive the front end housing 111b to rotate around the third axis 104, and the front end housing 111b drives the drive The motor 111c and the trimming head 111a as a whole rotate around the third axis 104, thereby causing the pitch angle A of the trimming assembly 111 to change. It can be understood that in other embodiments, the first transmission hole 212a and the first transmission part 221a can also be replaced by other transmission structures, and the first transmission hole 212a and the first transmission part 221a can also be exchanged. In other embodiments, the second transmission hole 111e and the second transmission part 222a can also be replaced by other structures, and the second transmission hole 111e and the second transmission part 222a can also be exchanged. In other embodiments, the drive motor 111c can also be disposed at the rear end of the trimmer 100, and the drive motor 111c can be disposed in the rear end housing. In this way, the front end mechanism 11 includes the front end housing 111b and the trimming head 111a. In this embodiment, the mowing assembly 111 can be understood as the mowing head 111a, or as the whole body composed of the mowing head 111a and the front-end housing 111b, or as the front-end housing 111b, the driving motor 111c and the mowing head. The whole grass head 111a. When the mowing assembly 111 is used to install blades, the mowing assembly 111 can be understood as an installation mechanism for installing blades, or as an integral body formed by the installation mechanism and the front-end housing 111b.

In this embodiment, the connecting member 223 is at least partially disposed in the connecting rod 131 , that is to say, the wire rope is passed through the connecting rod 131 .

In other embodiments, the driving assembly 22 may also include a motor for driving the pitch angle A of the grass trimming assembly 111 to change. In this way, when the user operates the operating member 21, the operating member 21 starts the motor, and the motor drives the grass trimming assembly 111. The movement causes the pitch angle A of the grass trimming assembly 111 to change, thus simplifying the structure of the adjustment device 20 .

As shown in Figures 7 and 10, in this embodiment, the connecting member 223 is a steel wire rope. When the adjustment device 20 is used for a long time, the steel wire rope may not be tensioned. Therefore, the lawn mower 100 also includes a tensioning device. Tensioning assembly 113 of the wire rope. The tensioning assembly 113 includes a tensioning element for securing the front mount 112 to the connecting rod 131 . When the wire rope is loose, the user rotates the tensioning element so that the front-end installation part 112 can slide relative to the connecting rod 131. At this time, the user slides the front-end installation part 112 forward along the first straight line 101 relative to the connecting rod 131. At this time, the front-end installation part 112 slides forward relative to the connecting rod 131. The second transmission member 222 also moves forward to tighten the wire rope, and then rotates the tensioning member to fix the front mounting member 112 to the connecting rod 131 again.

As shown in Figures 1 to 4, the operating part 21 is also separated from the rear end mechanism 12 by a second preset distance L10. That is to say, the operating part 21 does not need to be directly installed to the rear end mechanism 12. In this way, the user does not need to Go back and operate the operating member 21. The ratio of the first preset distance L3 to the second preset distance L10 is greater than or equal to 1.5 and less than or equal to 8, so that the operating member 21 is set at a reasonable position between the front end mechanism 11 and the rear end mechanism 12 .

As shown in FIGS. 12 to 15 , the adjustment device 20 further includes a first limiting member 24 for limiting the pitch angle A of the grass trimming assembly 111 to a preset angle. In this embodiment, the first limiting member 24 is a limiting pin, and the connecting rod device 13 includes a mounting member 132 for installing the first limiting member 24. The mounting member 132 is fixedly connected to the connecting rod 131, and the mounting member 132 forms There is a first receiving hole 132a, the first limiting member 24 is partially disposed in the first receiving hole 132a, and the first mounting part 212 is formed with a second receiving hole 212b into which the limiting pin can be inserted. A first biasing element 25 is also disposed in the first receiving hole 132a, and the biasing limiting pin is inserted into the second receiving hole 212b. The first biasing element 25 is a spring. The spring is provided in the first receiving hole 132a. When the biasing member biases the first limiting member 24 to be inserted into the second receiving hole 212b, the first limiting member 24 limits the operating member 21 to the preset position, so that the pitch angle A of the mowing assembly 111 is limited to the preset position. angle. When the user operates the operating member 21, the operating member 21 can overcome the bias of the first biasing element 25, so that the first limiting member 24 is separated from the second receiving hole 212b. At this time, the second receiving hole 212b crosses the first limit. The positioning member 24 allows the operating member 21 to rotate around the first axis 102 . In this embodiment, the user can simultaneously release the restriction of the first limiting member 24 through the operating member 21 and rotate the operating member 21 to adjust the pitch angle A of the mowing assembly 111 . That is to say, the user unlocks the operating member 21 by driving the operating member 21 to rotate around the first axis 102 and continues to operate the operating member 21 to rotate. That is to say, the user only needs one action to release the restriction of the operating member 21 by the first limiting member 24 and adjust the pitch angle A of the mowing assembly 111, thereby realizing the adjustment of the pitch angle A in one step, which facilitates the user's operation. It can be understood that in other embodiments, the first limiting member 24 may also be a limiting ball, or another structure that is biased by the first biasing element 25 .

In this embodiment, the number of the first limiting members 24 is multiple, and correspondingly, the number of the first biasing elements 25 is also multiple. Of course, it is not limited to this.

As shown in FIGS. 16 to 19 , the main handle 122 includes a main grip portion 122 b for the user to hold. When the main handle 122 rotates around the first straight line 101 , the lawn trimmer 100 can operate in the mowing mode and trimming mode. Switch between side modes. The lawn trimmer 100 also includes a limiting component 26. The limiting component 26 includes a second limiting member 261. The second limiting member 261 is used to rotate the main handle 122 relative to the trimming assembly 111 around the first straight line 101 to a preset position. position, the main handle 122 is limited to the preset position. The limiting component 26 is also configured to change the limiting state when the main handle 122 rotates around the first straight line 101 . In this embodiment, the change of the limiting state of whether the limiting component 26 limits the rotation of the main handle 122 is realized by the rotation of the main handle 122 around the first straight line 101 . In this way, for the user, the user only needs to rotate the main handle 122 normally to make the limiting component 26 escape from the restricted state to allow the main handle 122 to rotate, so that the user only needs one rotation action to release the restriction of the limiting component 26 The main handle 122 can also be rotated further.

Specifically, the limiting assembly 26 further includes a second biasing element 262 that generates a biasing force to bias the limiting member to limit the rotation of the main handle 122 .

Specifically, the second limiting member 261 is a movable element, such as a limiting pin, and the second biasing element 262 is a biasing spring. It can be understood that in other embodiments, the second limiting member 261 can also be a limiting ball. In this embodiment, the main handle 122 is also formed with a third receiving hole 122c, the second limiting member 261 is at least partially disposed in the third receiving hole 122c, and the second biasing element 262 is also disposed in the third receiving hole 122c. and bias the second limiting member 261. The limiting component 26 also includes a fitting portion 263 that cooperates with the second limiting member 261. The main handle 122 is limited to a preset position through the cooperation between the second limiting member 261 and the fitting portion 263. The biasing force of the second biasing element 262 causes the second limiting member 261 and the fitting portion 263 to cooperate. A fitting piece 133 is installed on the connecting rod 131. The fitting piece 133 forms the above-mentioned fitting part 263. The fitting part 263 is specifically a groove into which the second limiting part 261 can be inserted. It can be understood that the fitting portion 263 can also be a protrusion that restricts the second limiting member 261 from crossing when rotating around the first straight line 101. When the rotation force overcomes the biasing force, the protrusion allows the second limiting member 261 to pass over.

It can be understood that in other embodiments, the second limiting member 261 can also be connected to the connecting rod device 13 , and correspondingly, the fitting portion 263 is a groove or a protrusion connected to the main handle 122 .

When the lawnmower 100 is in the mowing mode, the second biasing element 262 biases the second limiting member 261 to cooperate with the fitting portion 263, and at this time, the rotation of the main handle 122 is restricted.

When it is necessary to switch the lawn trimmer 100 from the mowing mode to the trimming mode, the user grasps the connecting rod device 13 with one hand and the main handle 122 with the other hand and applies a rotational force around the first straight line 101 to the main handle 122. When the rotational force overcomes the biasing force of the second biasing element 262, the second limiting member 261 disengages from the mating portion 263. At this time, the user continues to apply rotational force to the main handle 122. The main handle 122 rotates around the first axis 102 relative to the connecting rod device 13. Turn. When the main handle 122 rotates until the second limiting member 261 cooperates with the fitting portion 263, the rotation force is stopped, and the main handle 122 is limited to the preset position by the second limiting member 261. In this embodiment, the number of the fitting portions 263 is multiple, so that the main handle 122 can be limited to multiple preset positions. In this embodiment, the number of second limiting members 261 is multiple, and the number of second biasing elements 262 is also multiple, which can improve the reliability of the limiting component 26 .

It can be understood that the limiting component in this embodiment can also be used in other rod-type tools. Correspondingly, the rod-type tools include functional components for realizing tool functions. By adjusting the main handle of the pole tool, the working angle of the functional components of the pole tool can be changed.

The structure of a lawn trimmer 400 of another embodiment shown in FIG. 20 is basically the same as that of the lawn trimmer 100 in FIG. 1 , and the only difference lies in the operating member 51 , the auxiliary handle 53 and the tensioning assembly 413 . The following mainly introduces the structural differences between the lawn mower 400 of this embodiment and the lawn mower 100 in FIG. 1 .

As shown in FIGS. 20 to 22 , the operating member 51 of the adjustment device 50 is connected to the auxiliary handle 53 . The operating member 51 and the auxiliary handle 53 are two parts. The operating member 51 and the auxiliary handle 53 can rotate around the first axis 402 together. When the user's hand holds the auxiliary handle 53 and the operating member 51 and rotates it, the auxiliary handle 53 and the operating member 51 as a whole can drive the driving assembly 52 to move, thereby driving the mowing assembly 411 to move so as to adjust the pitch angle of the mowing assembly 411 A1 changes.

As shown in FIGS. 20 to 25 , in this embodiment, the lawn trimmer 400 further includes a locking assembly 57 for locking the rotation of the operating member 51 . The locking component 57 includes a first locking part 571 provided on the mounting part 432 . The mounting part 432 is connected to the connecting rod 431 . The first locking part 571 is specifically a locking hole formed on the mounting part 432 . The operating member 51 includes a second locking portion 572 that cooperates with the locking hole, and the second locking portion 572 is a protruding portion. When the first locking part 571 and the second locking part 572 cooperate, the entirety composed of the operating member 51 and the auxiliary handle 53 is locked relative to the rotation of the connecting rod 431 device. When the first locking part 571 and the second locking part 572 are disengaged, the mounting part 432 allows the operating part 51 and the auxiliary handle 53 to rotate relative to the connecting rod 431 device, so that the adjusting device 50 can adjust the grass trimming assembly 411 at this time. The pitch angle A1. In this embodiment, the first locking part 571 is a locking hole, the second locking part 572 is a protruding part, and the operating member 51 is also configured to slide relative to the auxiliary handle 53 along the second straight line 405 direction. As shown in FIGS. 24 and 25 , when the operating member 51 slides relative to the auxiliary handle 53 along the first straight line 401 in a direction away from the mounting member 432 , the protruding portion can escape from the locking hole, and the operating member 51 can then rotate around the first straight line 401 and away from the mounting member 432 . One axis 402 rotates. In this embodiment, the locking assembly 57 further includes a reset element 573 that biases the operating member 51 so that the first locking portion 571 moves toward a state of mating with the second locking portion 572 . The return element 573 is a spring. When the user needs to adjust the pitch angle A1 of the mowing assembly 411, the user's hand holds the auxiliary handle 53 and the operating member 51, that is, the user's palm contacts the auxiliary handle 53, and the fingers hook the operating member 51 and move the operating member 51 along the first The two straight lines 405 move in the direction away from the mounting member 432. At this time, the operating member 51 compresses the reset element 573 and causes the protruding portion to disengage from the locking hole, and then rotates the operating member 51 and the auxiliary handle 53, and then the driving assembly 52 drives the lawn mower. Component 411 moves and changes the pitch angle A1. When the user releases the operating member 51 and the auxiliary handle 53, the reset element 573 drives the operating member 51 to move toward the mounting member 432 along the second straight line 405, the protruding portion extends into the locking hole, and the rotation of the operating member 51 is locked again.

As shown in Figures 22 and 26, the tensioning assembly 413 includes a tensioning element 413a. The tensioning element 413a is an element that can move relative to the connecting rod 431 in the direction of the third straight line 406 perpendicular to the first straight line 401. Specifically, A bolt that can move along the third straight line 406 and can rotate around the third straight line 406 is installed to the front end mounting piece 412 and the mounting piece 432 . The bolt presses against the wire rope to tension the wire rope. When the wire rope is loose, the user only needs to turn the bolt, and the bolt moves along the third straight line 406 to tighten the wire rope. The number of bolts is 2, and two bolts can respectively tighten one wire rope.

The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the industry should understand that the above embodiments do not limit the present application in any way, and any technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present application.

Claims (30)

1. A grass trimmer comprising:

the front-end mechanism comprises a grass cutting assembly;

a back-end mechanism comprising an energy source device for providing an energy source;

a connecting rod device connecting the front end mechanism and the rear end mechanism;

the adjusting device is used for adjusting the pitch angle of the grass cutting assembly relative to the connecting rod device;

Wherein, the adjusting device includes:

an operating member including an operating portion for a user to operate to adjust the pitch angle;

a drive assembly connecting the operating member and the grass cutting assembly such that the operating member, when operated, changes the pitch angle of the grass cutting assembly;

wherein the connecting rod device comprises a connecting rod which extends at least partially along a first straight line direction, and the distance between the operating part and the rear end of the grass mowing machine is more than or equal to 0 and less than or equal to 700 mm in the first straight line direction.

2. A grass trimmer according to claim 1, wherein the length of the connecting rod device is changeable, and when the connecting rod device is in the longest state, a distance between the operating portion and a rear end of the grass trimmer in the first straight line direction is 0 or more and 700 mm or less.

3. A grass cutting machine as claimed in claim 1, wherein the connecting rod means includes a first end connected to the front end mechanism and a second end connected to the rear end mechanism, the operating portion being at a distance of 200 mm or more from the first end.

4. A lawnmower as claimed in claim 1 wherein the connecting rod means comprises a first end connected to the front end mechanism and a second end connected to the rear end mechanism, the operating portion being at a distance of 400 mm or less from the second end.

5. A lawnmower according to claim 1, wherein a maximum distance between the operating portion and a front end of the lawnmower in the first linear direction is 300 mm or more when the mowing assembly is in a state in which the pitch angle is minimum.

6. A lawnmower as claimed in claim 1 wherein the operating element is mounted to the connecting rod arrangement and spaced a predetermined distance from the front end mechanism.

7. A lawnmower according to claim 1, further comprising a main handle for holding by a user, wherein a distance between the operating portion and the main handle in the first linear direction is 400 mm or less.

8. A grass cutting machine as claimed in claim 1, wherein the connecting rod means includes a first end connected to the front end mechanism and a second end connected to the rear end mechanism, and the ratio of the distance between the operating portion and the first end to the distance between the operating portion and the second end is 0.8 or more and 3 or less.

9. A lawnmower as claimed in claim 1 wherein the operating element is rotatable relative to the connecting rod arrangement when operated about a first axis, the first axis being substantially perpendicular to the first linear direction.

10. A lawnmower as claimed in claim 1 further comprising an auxiliary handle for gripping by a user, the auxiliary handle forming or being connected to the operating element.

11. A lawnmower as claimed in claim 1 wherein the operating element is rotatable about a first axis relative to the connecting rod arrangement when operated, the lawnmower further comprising an auxiliary handle for gripping by a user, the position of the auxiliary handle relative to the connecting rod arrangement remaining unchanged as the operating element is rotated about the first axis relative to the connecting rod arrangement.

12. A lawnmower as claimed in claim 1 wherein said drive assembly comprises: the grass mowing device comprises a first transmission part connected with the operation part, a second transmission part connected with the grass mowing assembly and a connecting part connected with the first transmission part and the second transmission part.

13. A lawnmower as claimed in claim 12 wherein the distance between the first transmission element and the second transmission element is greater than or equal to 200 mm and less than or equal to 800 mm.

14. A lawnmower as claimed in claim 12 wherein the connection element is a flexible element.

15. A lawnmower as claimed in claim 12 wherein said connection member is a rigid member.

16. A lawnmower as claimed in claim 12 wherein said connector is at least partially disposed within said connecting rod.

17. A lawnmower as claimed in claim 1 wherein said drive assembly comprises: and a motor for driving the grass cutting assembly to change the pitch angle.

18. A lawnmower as claimed in claim 1, further comprising a main handle for user operation, the main handle being arranged to be rotatable about a first line relative to the front end mechanism.

19. A lawnmower as claimed in claim 1, further comprising a main handle for user operation, the main handle being arranged to rotate about the first line relative to the entirety of the connecting rod arrangement and the front end mechanism.

20. A lawnmower as claimed in claim 1 wherein the front end mechanism further comprises a drive motor for driving the mowing assembly to perform a mowing function, the drive assembly driving the drive motor and the mowing assembly to vary an integral pitch angle.

21. A grass trimmer comprising:

a front end mechanism including a mowing assembly for mowing;

the front end of the connecting rod device is provided with the front end mechanism;

the adjusting device is used for adjusting the pitch angle of the grass cutting assembly relative to the connecting rod device;

the adjusting device comprises:

an operating member including an operating portion for a user to operate to adjust the pitch angle;

the operating member is mounted to the connecting rod arrangement and spaced a first predetermined distance from the front end mechanism.

22. A lawnmower as claimed in claim 21 further comprising a rear end mechanism provided at a rear end of said connecting rod means, said operating element being provided between said front end mechanism and said rear end mechanism.

23. A lawnmower as claimed in claim 22 wherein said operating element is spaced from said backend mechanism by a second predetermined distance.

24. A lawnmower as claimed in claim 23 wherein the ratio of the first predetermined distance to the second predetermined distance is greater than or equal to 1.5 and less than or equal to 8.

25. A lawnmower as claimed in claim 21 wherein the adjustment device further comprises a drive assembly connecting the operating member and the mowing assembly such that the operating member, when operated, changes the pitch angle of the mowing assembly.

26. A lawnmower as claimed in claim 25 wherein said drive assembly is at least partially disposed within said connecting rod arrangement.

27. A lawnmower as claimed in claim 21 wherein the operating element is further formed or connected with a stop for limiting the pitch angle of the grass cutting assembly to a predetermined angle.

28. A lawnmower as claimed in claim 27 wherein the operating element is arranged to rotate about a first axis relative to the connecting rod arrangement to adjust the pitch angle of the mowing assembly, the operating element further being arranged to release the limit of the limit stop when rotated about the first axis.

29. A lawnmower as claimed in claim 21 wherein the operating element is arranged to rotate about a first axis relative to the connecting rod arrangement to adjust the pitch angle of the mowing assembly.

30. A grass trimmer comprising:

the front-end mechanism comprises a grass cutting assembly;

a back-end mechanism comprising an energy source device providing an energy source;

a connecting rod device connecting the front end mechanism and the rear end mechanism;

the adjusting device is used for adjusting the pitch angle of the grass cutting assembly relative to the connecting rod device;

Wherein, the adjusting device includes:

an operating member including an operating portion for a user to operate to adjust the pitch angle;

a drive assembly connecting the operating member and the grass cutting assembly such that the operating member, when operated, changes the pitch angle of the grass cutting assembly;

the connecting rod device comprises a connecting rod which extends at least partially along a first straight line direction, and the ratio of the distance between the operating part and the rear end of the grass trimmer to the length of the grass trimmer along the first straight line direction is more than or equal to 0.1 and less than or equal to 0.8 in the first straight line direction.