Rear walking type power tool

Abstract

The invention discloses a backward walking type power tool which comprises a working assembly, a first driving assembly, a second driving assembly and a driving assembly, and the working assembly comprises a working piece and a first motor driving the working piece to move; the main body is arranged to accommodate at least part of the working component; a handle device connected to the main body; the backward walking type power tool is characterized in that the main body and at least part of the handle device are in a motion state of performing relative motion; the back-walking type power tool further comprises an operation device which is operated by a user so that the back-walking type power tool can be switched to the motion state. The backward walking type power tool is convenient to use, and the working efficiency of a user can also be improved.

Description

Technical Field

[0001] The present application relates to the technical field of garden tools, and in particular to a rear-propelled power tool. Background Art

[0002] A rear-propelled power tool in the related art is usually composed of a handle device, a motor, a travel assembly, a working piece, etc. The user pushes the handle device to make the rear-propelled power tool move on the ground, and the motor drives the working piece to rotate at a high speed, which has high working efficiency, reduces the working time of the workers, and saves a lot of human resources.

[0003] In the prior art, when the user is not using the rear-propelled power tool, the user will fold up the handle device to store the rear-propelled power tool. When the user is using the rear-propelled power tool for operation, the user will unfold the handle device to use the rear-propelled power tool. The user needs to manually unfold or fold the handle device, which is inconvenient to operate and reduces work efficiency.

[0004] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0005] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a rear-propelled power tool that is easy to use and has high working efficiency.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions: A rear-propelled power tool comprises: a working assembly, including a working piece and a first motor configured to drive the working piece to move; a main body, configured to accommodate at least part of the working assembly; and a handle device connected to the main body; the characteristic is that the rear-propelled power tool has a motion state in which the main body and at least part of the handle device perform relative motion; the rear-propelled power tool also includes an operating device for a user to operate to switch the rear-propelled power tool to the motion state.

[0007] In some embodiments, the rear-propelled power tool has a locking state in which the main body and at least part of the handle device are relatively fixed, and the operating device is operated by the user to make the rear-propelled power tool leave the locking state and switch to the moving state.

[0008] In some embodiments, the walk-behind power tool comprises a locking assembly configured to lock the relative positions of the main body and at least a portion of the handle device, and the locking assembly responds to the user's operation of the operating device to release the walk-behind power tool from a locked state.

[0009] In some embodiments, a walk-behind power tool includes a drive assembly for driving a body and at least a portion of a handle assembly to perform relative movement.

[0010] In some embodiments, the drive assembly includes a second motor.

[0011] In some embodiments, the drive assembly includes a resilient member.

[0012] In some embodiments, in the motion state, the handle device and the main body rotate relative to each other.

[0013] In some embodiments, the handle device includes a connecting end mounted on the body and a gripping end for the user to grasp, and the rotation has a first direction in which the body and the gripping end move away from each other, and a second direction in which the body and the gripping end move toward each other.

[0014] In some embodiments, the range of relative movement of the body and at least part of the handle arrangement is adjustable.

[0015] In some embodiments, the operating device is disposed on the handle device.

[0016] The benefit of the present application is that the user can switch the rear-propelled power tool to a state where the main body and at least part of the handle device move relative to each other through the operating device, which facilitates operation and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic view of a walk-behind power tool; Figure 2 yes Figure 1 A three-dimensional diagram of a rear-propelled power tool in motion; Figure 3 yes Figure 1 A perspective view of a walk-behind power tool in a folded position; Figure 4 yes Figure 1 An exploded view of a walk-behind power tool at an angle; Figure 5 yes Figure 1 An exploded view of the rear-propelled power tool at another angle; Figure 6 yes Figure 1 A three-dimensional diagram of a travel assembly and a wheel lock of a rear-propelled power tool; Figure 7 yes Figure 1 A perspective view of an embodiment of a rear-propelled power tool; Figure 8 yes Figure 7 A side view of a walk-behind power tool in a deployed position; Fig. 9 yes Figure 7 A side view of a walk-behind power tool in a folded position. DETAILED DESCRIPTION

[0018] Before any embodiments of the application are explained in detail, it is to be understood that the 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.

[0019] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0020] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0021] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0022] In this application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0023] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0024] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0025] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When a unit "controller", "processor", "central processing unit", "CPU", or "MCU" is used to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.

[0026] In the present application, the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.

[0027] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0028] In order to facilitate the description of the technical solution of this application, the following is also defined: Figure 1 The up, down, front, back, left and right are indicated by the arrows. Figure 1 Take the state of the rear-propelled power tool 100 in FIG. 1 as an example.

[0029] Figure 1 The walk-behind power tool shown is used for users to cut grass in lawns, such as lawns in gardens, golf courses, etc. The grass in the lawn needs to be regularly cared for, so the walk-behind power tool needs to be frequently used for mowing. In this embodiment, the walk-behind power tool is a lawn mower 100. When the user is operating the lawn mower 100, the user stands behind the lawn mower 100 to push the lawn mower 100 to walk on the ground.

[0030] like Figures 1 to 3 As shown, the lawn mower 100 includes a main body 110, a handle device 120, a working assembly 130 and a travel assembly 140. The main body 110 accommodates at least part of the working assembly 130. The working assembly 130 includes a working piece 131 and a first motor 132, and the first motor 132 drives the working piece 131 to move. The main body 110 includes a chassis 111. The chassis 111 is formed with a receiving space 111a for receiving at least part of the working piece 131. The receiving space 111a is open downward, and the working piece 131 is arranged in the receiving space 111a. The first motor 132 is mounted to the chassis 111, and the working piece 131 is mounted to the first motor 132 to be driven by the first motor 132. The working piece 131 can be a blade, and the blade can have one or more. The first motor 132 can be a motor. The motor drives the blade to rotate at high speed to cut grass.

[0031] The walking assembly 140 includes two front walking wheels and two rear walking wheels 141. The walking assembly 140 can at least drive the lawn mower 100 forward, backward and turn on the ground. The walking assembly 140 supports the main body 110 and the handle device 120, and the main body 110 supports the working assembly 130. The main body 110 connects the walking assembly 140, the working assembly 130, and the handle device 120 as a whole. The main body 110 also includes a joint 111b, and the joint 111b is used to connect an energy device. The energy device is a battery pack, and the battery pack is used to provide a source of electricity for the lawn mower 100. In other embodiments, the joint 111b can also be connected to a cable, and the cable can be connected to the municipal power grid. In other embodiments, the joint 111b can also be connected to other energy devices, for example, the joint 111b can be connected to a fuel tank, and the fuel in the fuel tank can provide energy for the lawn mower 100.

[0032] The handle device 120 is connected to the main body 110. The lawn mower 100 has a motion state in which the main body 110 and at least part of the handle device 120 perform relative motion. During the relative motion of the main body 110 and at least part of the handle device 120, the lawn mower 100 is in a motion state. In this embodiment, the handle device 120 is pivotally connected to the main body 110. In the motion state, the handle device 120 rotates relative to the main body 110. In some embodiments, the handle device 120 is fixedly connected to the main body 110. The handle device 120 is configured for user operation. The handle device 120 includes a gripping end 121 and a connecting rod 122, the gripping end 121 is used for the user to grip to push or hold the lawn mower 100, and the connecting rod 122 connects the gripping end 121 and the main body 110. The connecting rod 122 includes a connecting end 122a, and the connecting end 122a is mounted on the main body 110. The handle device 120 also includes a trigger 123, which is arranged on the gripping end 121. The trigger 123 is for the user to press to control the lawn mower 100 to mow the lawn.

[0033] When the user uses the lawn mower 100 to mow the lawn and stores the lawn mower 100, the user needs to adjust the position of the handle device 120, that is, adjust the relative position of the handle device 120 and the main body 110. The relative position of the handle device 120 and the main body 110 includes a storage position and an unfolded position. The storage position is a position where the user can store the lawn mower 100 in a box, or put the lawn mower 100 upright in a corner, or park the lawn mower 100 on the ground. The unfolded position is a position where the user can easily push the lawn mower 100 through the handle device 120, and there can be multiple unfolded positions. In the process of the relative position of the handle device 120 and the main body 110 being converted from the storage position to the unfolded position, or in the process of the relative position of the handle device 120 and the main body 110 being converted from the unfolded position to the storage position, the lawn mower 100 is in motion.

[0034] The lawn mower 100 further includes an operating device 150 for the user to operate so as to switch the lawn mower 100 to a motion state. When the user operates the operating device 150, the relative positions of the main body 110 and at least a part of the handle device 120 change, and the lawn mower 100 is in a motion state. In this way, after the user operates the operating device 150, the relative positions of the main body 110 and at least a part of the handle device 120 automatically change. The user does not need to manually unfold or fold the handle device 120, and the main body 110 and at least a part of the handle device 120 can be automatically unfolded or folded by operating the operating device 150, which is convenient to operate and improves work efficiency. When the user rotates the handle device 120 relative to the main body 110 through the operating device 150, the rotation can have a first direction and a second direction. When the handle device 120 rotates relative to the main body 110 in the first direction, the main body 110 and the grip end 121 move away from each other. When the handle device 120 rotates relative to the main body 110 in the second direction, the main body 110 and the grip end 121 move closer to each other. In some embodiments, there may be multiple operating devices 150, and the multiple operating devices 150 control the handle device 120 or the main body 110 to move in different directions. In some embodiments, the user can also extend or shorten the handle device 120 through the operating device 150, and the movement mode of at least part of the handle device 120 relative to the main body 110 is not limited here, as long as the main body 110 and at least part of the handle device 120 move relative to each other.

[0035] The lawn mower 100 has a locking state in which the main body 110 and at least a part of the handle device 120 are relatively fixed. The operating device 150 is operated by the user to make the lawn mower 100 out of the locking state and switch to the moving state. In this way, when the user operates the operating device 150, the main body 110 and at least a part of the handle device 120 are first out of the locking state, and then the relative position of the main body 110 and at least a part of the handle device 120 is automatically changed. It is highly safe and more convenient for users to operate.

[0036] The lawn mower 100 includes a locking assembly 160, which is configured to lock the relative position of the main body 110 and at least a part of the handle device 120. The locking assembly 160 responds to the user's operation of the operating device 150 to make the lawn mower 100 out of the locked state. The lawn mower 100 includes a driving assembly 170, which drives the main body 110 and at least a part of the handle device 120 to move relative to each other. When the user operates the operating device 150, the locking assembly 160 first responds to the user's operation of the operating device 150, unlocks the main body 110 and at least a part of the handle device 120, and the main body 110 and at least a part of the handle device 120 are out of the locked state. Afterwards, the driving assembly 170 drives the relative position of the main body 110 and at least a part of the handle device 120 to change again. It should be noted that, although there may be a sequence in the two steps of unlocking the main body 110 and at least part of the handle device 120, and driving the driving component 170 to change the relative position of the main body 110 and at least part of the handle device 120, for the user, as long as the operating device 150 is operated, the main body 110 and the handle device 120 can automatically change their positions almost at the moment of unlocking, without the need for manual operation by the user, which is convenient and quick.

[0037] like Figures 4 to 6 As shown, the locking assembly 160 includes a lifting member 161, a pivoting member 162, and a pin 163. The pivoting member 162 includes a hole 162a. The operating device 150 includes a first operating member 151 and a second operating member 152. One end of the lifting member 161 is connected to the second operating member 152, and the other end passes through the hole 162a to connect with the pivoting member 162. One end of the pin 163 is arranged on the pivoting member 162, and the other end is arranged to be engaged with the main body 110, so that the position of the handle device 120 and the main body 110 is locked. The pivoting member 162 is arranged to rotate around the first axis 101. The hole 162a and the pin 163 are respectively arranged on both sides of the first axis 101. When the user operates the operating device 150, the second operating member 152 drives the lifting member 161 to move along the extension direction of the handle device 120, and the lifting member 161 drives the pivoting member 162 to rotate around the first axis 101. The pivoting member 162 drives the pin 163 to move, and the pin 163 is unlocked from the main body 110 . The lawn mower 100 is released from the locked state, and the handle device 120 can move relative to the main body 110 .

[0038] In this embodiment, the driving assembly 170 includes a second motor 171, which is an electric motor. The second motor 171 is also a motor that drives the walking assembly 140 to walk automatically. The second motor 171 is a wheel hub motor, which is arranged on the walking assembly 140. In some embodiments, the second motor 171 can also be a separate motor, and the separate motor drives the relative position of the main body 110 and the handle device 120 to change. The second motor 171 can also be an inner rotor or outer rotor motor.

[0039] In this embodiment, the position of the handle device 120 remains unchanged, and the driving assembly 170 drives the main body 110 to be lifted or lowered relative to the handle device 120. The operating device 150 is arranged on the handle device 120. The connecting rod 122 includes a first rod 122a and a second rod 122b. The lawn mower 100 includes a connecting member 180. The connecting member 180 connects the first rod 122a and the second rod 122b, and is sleeved on the first rod 122a and the second rod 122b. The connecting member 180 includes a first shell 180a and a second shell 180b. An accommodating chamber 180c is formed between the first shell 180a and the second shell 180b. The first operating member 151 and the first shell 180a are integrally formed. The second operating member 152 is arranged in the accommodating chamber 180c. When the user operates the operating device 150, the second operating member 152 moves in the accommodating chamber 180c along the extending direction of the handle device 120. The operating device 150 also includes a first switch 153. The second operating member 152 is configured to trigger the first switch 153. When the first switch 153 is triggered, the second motor 171 drives the main body 110 to rotate. When the main body 110 rotates in the first direction, the lawn mower 110 is unfolded. When the main body 110 rotates in the second direction, the lawn mower 110 is stored. When the lawn mower 110 is stored by rotating the main body 110, the user does not need to bend over, and the lawn mower 110 can be placed vertically against the wall, which is convenient to use. In some embodiments, the operating device 150 can also be a button, a knob, a trigger, a touch switch, etc., which is not limited here.

[0040] like Figure 6As shown, the lawn mower 110 includes a wheel lock 190. The wheel lock 190 is arranged on the travel assembly 140. The travel assembly 140 includes a rear travel wheel 141. The rear travel wheel 141 is arranged to rotate around the wheel axle 102. Before the user operates the operating device 150, the rear travel wheel 141 can be locked by the wheel lock 190 to prevent the rear travel wheel 141 from rotating. The wheel lock 190 includes a stepping portion 191 and a locking portion 192. The stepping portion 191 is for the user to step on so that the locking portion 192 locks the travel assembly 140. The locking portion 192 is connected to the wheel axle 102 and is arranged to rotate around the wheel axle 102. When the user steps on the stepping portion 191, the locking portion 192 clamps the wheel axle 102 to limit the rotation of the rear travel wheel 141. In this way, when the second motor 171 drives the main body 110 to rotate, the rear travel wheel 141 can be stably stopped on the ground.

[0041] like Figures 7 to 9 As shown, in some embodiments, the driving assembly 170 not only drives the relative position of the main body 110 and at least part of the handle device 120 to change by electric power, but also by elastic force. When the user wants to fold or unfold the lawn mower 100, the position of the main body 110 remains unchanged, and the handle device 120 is lifted or dropped relative to the main body 110. The handle device 120 rotates around the third axis 103 relative to the main body 110. The driving assembly 170 includes an elastic member 172. The elastic member 172 is arranged on the main body 110 and is arranged to abut against the handle device 120 when the lawn mower 100 is in the folded position. The operating device 150 is arranged on the main body 110. The user can operate the operating device 150 with his feet without bending over to switch the lawn mower 100 to the motion state. When the user wants the handle device 120 to unfold, the compressed elastic member 172 converts the elastic force into power, drives the handle device 120 to rotate in the first direction, and the relative position of the handle device 120 and the main body 110 changes to the unfolded position. In some embodiments, the handle device 120 is driven by elastic force to move to a position where the user can reach without bending over, and then the user manually pulls the handle device 120 to the unfolded position, which is safe and energy-saving. In some embodiments, the drive assembly 170 also includes a motor, and when the user wants the handle device 120 to be folded, the motor drives the handle device 120 to rotate in the second direction. In some embodiments, the user manually presses the handle device 120 downward, the elastic member 172 is compressed by the handle device, and the relative position of the handle device 120 and the main body 110 changes to the folded position.

[0042] In some embodiments, the relative motion of the main body 110 and at least part of the handle device 120 is adjustable. When the driving assembly 170 drives the main body 110 or the handle device 120 to rotate, the main body 110 or the handle device 120 can be stopped at a position suitable for different heights of users, which is convenient and safe to use.

[0043] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A walk-behind power tool, comprising: A working assembly, comprising a working piece and a first motor configured to drive the working piece to move; a main body, configured to accommodate at least a portion of the working assembly; a handle device connected to the body; It is characterized in that The walk-behind power tool has a motion state in which the main body and at least a portion of the handle device move relative to each other; The rear-propelled power tool further comprises an operating device for a user to operate to switch the rear-propelled power tool to the motion state.

2. The walk-behind power tool according to claim 1, characterized in that: The rear-propelled power tool has a relatively fixed locking state in which the main body and at least a portion of the handle device are relatively fixed, and the operating device is operated by the user to make the rear-propelled power tool leave the locking state and switch to the moving state.

3. The walk-behind power tool according to claim 2, characterized in that: The rear-propelled power tool comprises a locking assembly configured to lock the relative positions of the main body and at least a portion of the handle device, wherein the locking assembly responds to the user's operation of the operating device to release the rear-propelled power tool from the locked state.

4. The walk-behind power tool according to claim 1, characterized in that: The walk-behind power tool includes a drive assembly for driving the main body and at least a portion of the handle device to perform the relative movement.

5. The walk-behind power tool according to claim 4, characterized in that: The drive assembly includes a second motor.

6. The walk-behind power tool according to claim 4, characterized in that: The drive assembly includes an elastic member.

7. The walk-behind power tool according to claim 1, characterized in that: In the moving state, the handle device and the main body rotate relatively.

8. The walk-behind power tool according to claim 7, characterized in that: The handle device includes a connecting end installed on the main body and a gripping end for the user to grasp. The rotation has a first direction in which the main body and the gripping end move away from each other, and a second direction in which the main body and the gripping end move toward each other.

9. The walk-behind power tool according to claim 1, characterized in that: The relative movement of the main body and at least part of the handle device is adjustable.

10. The walk-behind power tool according to claim 1, characterized in that: The operating device is arranged on the handle device.

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