power tools

Abstract

This utility model relates to an electric tool, including a connecting component extending along a first axis, a working component connected to the front end of the connecting component, a power housing located at the rear end of the connecting component, and a protective component connected to the connecting component or the working component; the protective component and the power housing include a support portion for supporting the electric tool on a horizontal surface. When the electric tool is placed on a horizontal surface, the rear end face of the power housing has a transverse centerline perpendicular to the first axis, and the center of gravity of the electric tool is located above the transverse centerline, thereby improving the stability of the entire machine.

Description

Technical Field

[0001] This utility model relates to an electric tool, and more particularly to an electric tool that is comfortable to operate and stable to place. Background Technology

[0002] Currently, the output components of power tools on the market are concentrated at the front, while the power components and handles are concentrated at the rear. This makes the overall center of gravity of the power tool unbalanced, resulting in a poor user experience. Furthermore, when the power tool is placed horizontally, the machine may tip over and cause damage.

[0003] In view of the above problems, it is indeed necessary to provide a power tool to overcome the shortcomings of the prior art. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electric tool to improve user operating comfort and overall machine stability.

[0005] The present invention addresses the existing technical problems by adopting the following technical solution: an electric tool, comprising a connecting component extending along a first axis, a working component connected to the front end of the connecting component, a power housing located at the rear end of the connecting component, and a protective component connected to the connecting component or the working component; the protective component and the power housing include a support portion for supporting the electric tool on a horizontal surface, wherein when the electric tool is placed on the horizontal surface, the first axis intersects the horizontal surface, the rear end face of the power housing has a transverse center line perpendicular to the first axis, and the center of gravity of the electric tool is located above the transverse center line.

[0006] Further improvement: The power tool includes a power supply assembly connected to the power housing along the second axis. When the power tool is placed on the horizontal surface, the power supply assembly is not in contact with the horizontal surface, and the center of gravity of the power tool after the power supply assembly is installed is located above the transverse center line.

[0007] Further improvement: The support includes a first support located on the protective assembly and a second support located on the power housing. The maximum dimension of the first support in the lateral direction is greater than the maximum dimension of the second support in the lateral direction, and the shortest distance of the first support from the first axis is greater than the shortest distance of the second support from the first axis.

[0008] Further improvement: The maximum dimension of the second support in the lateral direction is smaller than the maximum dimension of the power housing in the lateral direction, and the second support in the vertical direction is located below the power supply component.

[0009] Further improvement: The power supply components are symmetrically connected to the lateral sides of the power housing, and the minimum lateral distance between the two power supply components is less than the maximum lateral dimension of the second support portion.

[0010] Further improvement: The power housing includes a mounting portion for mounting the power supply component, a first sidewall located on the front side of the mounting portion, and a second sidewall located on the rear side of the mounting portion. After the power supply component is mounted to the mounting portion, the first sidewall and the second sidewall at least partially overlap with the side of the power supply component.

[0011] Further improvement: The power housing includes a body connected to the connecting assembly, a first sidewall and a second sidewall extending laterally from the body, wherein the maximum dimension of the first sidewall in the lateral direction is greater than the maximum dimension of the second sidewall in the lateral direction.

[0012] Further improvement: The power tool includes a control component located within the power housing. The rear end face of the power housing has a vertical centerline perpendicular to the transverse centerline, two first sidewalls symmetrically arranged on both sides of the vertical centerline, and a vent extending transversely through the first sidewalls. The two first sidewalls enclose a receiving cavity for accommodating the control component, and the vent is in fluid communication with the receiving cavity.

[0013] Further improvement: The vertical distance between the projection point of the center of gravity on the rear end face of the power housing and the transverse centerline is 5%-15% of the maximum vertical dimension of the power housing.

[0014] Further improvement: When the power tool is placed on the horizontal surface, the maximum vertical dimension of the protective component is greater than the maximum vertical dimension of the power housing.

[0015] Compared with the prior art, the present invention has the following beneficial effects: by setting a support part in the protective component and the power housing, when the power tool is placed on a horizontal surface, the whole machine tilts relative to the horizontal surface, so that the projection of the center of gravity of the whole machine on the rear end face of the power housing moves upward, which facilitates the improvement of the user's operating experience and makes the whole machine more stable when placed. Attached Figure Description

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0017] Figure 1 This is a side view of the power tool of this utility model placed on a horizontal plane;

[0018] Figure 2 yes Figure 1The power tool shown is a rear view taken from the rear of the power housing.

[0019] Figure 3 yes Figure 2 The power tool shown is a rear view with the battery pack installed.

[0020] Figure 4 yes Figure 1 A partially enlarged view of the power housing of the power tool shown;

[0021] Figure 5 yes Figure 1 The power tool shown is a top view placed on a horizontal plane.

[0022] Meaning of the reference numerals in the diagram:

[0023] 100 power tools, 10 working components

[0024] Protective component 11 First support part 110

[0025] Cutting component 12, connecting component 20

[0026] Main controller 30, auxiliary controller 40

[0027] Power housing 50 Ventilation port 51

[0028] Second support section 52 First side wall 53

[0029] Second sidewall 54 Body 55

[0030] Power supply component 60; Control component 70

[0031] First axis L1 Second axis L2

[0032] Lateral centerline L3, center of gravity G Detailed Implementation

[0033] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. In the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the invention. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical, and operation may be made without departing from the spirit and scope of the invention.

[0034] Although the terms first, second, etc., are used herein to describe various elements in some embodiments, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise.

[0035] For example, the terms "upper," "lower," "front," and "back" used below, which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of facilitating the description of this utility model and simplifying the description, and do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Please refer to Figure 1 As shown, the power tool 100 of this utility model can be a long-handled power tool such as a lawnmower, brush cutter, high-branch saw, high-branch shears, or long-shaft blower. The following will take a lawnmower as an example. The lawnmower includes a working component 10, a connecting component 20 connected at one end to the working component 10, a main handle 30 connected to the other end of the connecting component 20, and an auxiliary handle 40 disposed on the connecting component 20.

[0037] The working component 10 is connected to the front end of the connecting component 20. The lawnmower also includes a protective component 11 connected to the connecting component 20 or the working component 10 and a cutting component 12 for user operation. The cutting component 12 may be a grass trimmer or a brush cutter blade, etc. The working component 10 also includes a motor (not shown) for driving the cutting component 12 and a fan for cooling the motor. Both the motor and the fan are located inside the front head shell.

[0038] The connecting component 20 extends along the first axis L1. The connecting component 20 includes a first connecting pipe connected to the working component 10 and a second connecting pipe connected to the main handle 30. A connector is provided between the first connecting pipe and the second connecting pipe to connect the two connecting pipes. The two connecting pipes can be folded to facilitate the storage of the lawnmower.

[0039] An auxiliary handle 40 is provided between the main handle 30 and the working component 10, and the auxiliary handle 40 is positioned close to the main handle 30, so that the user can operate it with both hands during use, avoiding the lawnmower from tilting or going out of control due to force applied to one side; the auxiliary handle 40 is installed on the second connecting pipe of the connecting component 20 by screws or other fasteners, and a horizontal protective bar is also installed on the left side of the auxiliary handle 40 to prevent injury to the user during use.

[0040] The lawnmower also includes a power housing 50 located at the rear end of the connecting assembly 20 and a power supply assembly 60 connected to the power housing 50. The power housing 50 has a control assembly 70 that is communicatively connected to the motor inside. The power housing 50 also includes several ventilation openings 51 located near the control assembly 70. The ventilation openings 51 are located between the main handle 30 and the power supply assembly 60 in the direction of the first axis L1.

[0041] Please see Figure 1 As shown, when the lawnmower is placed on a horizontal surface, the protective assembly 11 and the power housing 50 include a support portion for supporting the lawnmower on the horizontal surface. The first axis L1 intersects the horizontal plane, meaning the lawnmower body is tilted at a certain angle relative to the horizontal plane. Because the overall size of the protective assembly 11 is larger than the overall size of the power housing 50, when the lawnmower is placed on the ground, the end of the connecting assembly 20 near the protective assembly 11 is higher than the end of the connecting assembly 20 near the power housing 50. Therefore, the connecting assembly 20 is tilted relative to the horizontal plane, and the first axis L1 of the connecting assembly 20 has a certain angle with the horizontal plane.

[0042] Please see Figure 2 As shown, viewed from the rear end of the power housing 50 of the lawnmower, the power housing 50 includes a rear end face, and the rear end face of the power housing 50 has a transverse center line L3 perpendicular to the first axis L1. The center of gravity G of the lawnmower is located above the transverse center line L3, wherein the transverse center line L3 is an imaginary reference line on the rear end face of the power housing 50 that passes through its geometric center in the left-right horizontal direction, and is used to measure and define the transverse position of the center of gravity G. By providing a support at the bottom of the power housing 50, the center of gravity G of the lawnmower is moved upward, which is beneficial to improving the user's operating experience.

[0043] The vertical distance between the projection point of the center of gravity G on the rear end face and the transverse centerline L3 is small, meaning the offset of the center of gravity G from the transverse centerline L3 is small. The maximum vertical dimension of the power housing 50 is H, and the vertical distance between the projection point of the center of gravity G on the rear end face of the power housing 50 and the transverse centerline L3 accounts for 5%-15% of the maximum vertical dimension H of the power housing 50.

[0044] In this embodiment, the maximum vertical dimension H of the power housing 50 is 108.7 mm. Therefore, 5%-15% of H is 5.4-16.3 mm. Measurements show that the offset of the center of gravity G from the lateral center line L3 is 11.4 mm, which falls within the range of 5.4-16.3 mm. By controlling the offset of the center of gravity G from the lateral center line L3, allowing the offset to fluctuate within 5%-15% of H, the overall center of gravity G is made almost close to the lateral center line L3.

[0045] Please see Figures 1 to 3 As shown, the lawnmower includes a power supply assembly 60 connected to the power housing 50 along the second axis L2. When the lawnmower is placed on the horizontal surface, the power supply assembly 60 is not in contact with the horizontal surface, and the center of gravity G of the lawnmower after installing the power supply assembly 60 is also located above the transverse centerline L3. By providing a support at the bottom of the power housing 50, the power supply assembly 60 is not in direct contact with the horizontal surface. When the lawnmower is placed on the ground or accidentally dropped, the power supply assembly 60 will not be worn, thereby extending the service life of the power supply assembly 60.

[0046] The power supply component 60 is inserted into the mounting portion along the second axis L2, and the second axis L2 is perpendicular to the first axis L1, meaning the power supply component 60 is vertically mounted to both sides of the power housing 50 along the second axis L2. When the lawnmower is placed on a horizontal plane, both the first axis L1 and the second axis L2 intersect the horizontal plane. The power supply component 60 protrudes at least partially from the top of the power housing 50 along the second axis L2, meaning the highest point of the power supply component 60 on the second axis L2 is above the top of the power housing 50, and the lowest point of the power supply component 60 on the second axis L2 is also above the bottom of the power housing 50, so that the power supply component 60 is suspended relative to the horizontal plane to avoid direct contact with the horizontal plane and damage.

[0047] Please see Figures 4 to 5 As shown, the power housing 50 includes a mounting portion for mounting the power supply component 60, a first sidewall 53 located on the front side of the mounting portion, and a second sidewall 54 located on the rear side of the mounting portion. After the power supply component 60 is mounted to the mounting portion, the first sidewall 53 and the second sidewall 54 at least partially overlap with the side of the power supply component 60. By tightly mounting the power supply component 60 to the mounting portion of the power housing 50, the rear structure of the lawnmower becomes more compact.

[0048] The power housing 50 includes a body 55 connected to the connecting assembly 20. A first sidewall 53 and a second sidewall 54 extend laterally from the body 55, with the maximum lateral dimension of the first sidewall 53 being greater than that of the second sidewall 54. When the lawnmower is equipped with the power supply assembly 60, the first sidewall 53 is completely obscured by the power supply assembly 60 when viewed from the rear. When the lawnmower is not equipped with the power supply assembly 60, the maximum lateral dimension W1 of the power housing 50 is at least partially formed by the lateral dimension of the first sidewall 53.

[0049] Viewed from the rear side of the lawnmower, the rear end face of the power housing 50 has a vertical centerline (not shown) perpendicular to the transverse centerline L3, two first sidewalls 53 symmetrically arranged on both sides of the vertical centerline, and a vent 51 extending transversely through the first sidewalls 53. The two first sidewalls 53 enclose a receiving cavity for accommodating the control component 70, and the vent 51 is in fluid communication with the receiving cavity.

[0050] The power supply component 60 is installed on both sides of the power housing 50 along the second axis L2, and the power supply component 60 is symmetrically arranged with respect to the vertical center line; the power supply component 60 and the power housing 50 overlap at least partially in the width direction of the rear end face of the power housing 50, that is, when viewed from the rear side of the power housing 50, the power supply component 60 is at least partially covered by the power housing 50, so that the power supply component 60 is installed relatively compactly in the mounting part of the power housing 50, thereby achieving a compact rear end structure layout of the lawnmower.

[0051] Please see Figures 1 to 3 As shown, when the lawnmower is placed on the horizontal plane, the protective component 11 at the front end of the lawnmower and the power housing 50 at the rear end of the lawnmower are supported on the ground, and the maximum vertical dimension of the protective component 11 is greater than the maximum vertical dimension H of the power housing 50. Specifically, the support includes a first support 110 located on the protective component 11 and a second support 52 located on the power housing 50.

[0052] Please see Figure 2As shown, the maximum dimension of the first support portion 110 in the lateral direction is D1, and the maximum dimension of the second support portion 52 in the lateral direction is W2. Viewed from the rear side of the lawnmower, the maximum dimension D1 of the first support portion 110 in the lateral direction is greater than the maximum dimension W2 of the second support portion 52 in the lateral direction. In addition, the shortest distance of the first support portion 110 from the first axis L1 is greater than the shortest distance of the second support portion 52 from the first axis L1, that is, the second support portion 52 is closer to the connecting assembly 20 than the first support portion 110.

[0053] This indicates that when the lawnmower is placed, the support span provided by the protective component 11 is wider than the support span provided by the power housing 50. The wider support span brings higher stability, which means that the lawnmower mainly relies on the protective component 11 to prevent lateral tipping when placed horizontally, thereby improving the overall stability of the machine.

[0054] If the maximum dimension of the power housing 50 in the lateral direction is W1, then the maximum dimension of the second support part 52 in the lateral direction is W2, which is smaller than the maximum dimension of the power housing 50 in the lateral direction, and the second support part 52 is located on the lower side of the power supply group 60 in the vertical direction.

[0055] The maximum vertical dimension H of the power housing 50 is greater than the maximum horizontal dimension W1 of the power housing 50. The power housing 50 has a tall and narrow structural shape, which makes it less stable when the lawnmower is placed on a horizontal surface. Therefore, a second support part 52 is provided at the bottom of the power housing 50 to abut against the horizontal surface, thereby increasing the contact area between the lawnmower and the horizontal surface and improving the stability of the whole machine.

[0056] The power supply components 60 are symmetrically connected to the two lateral sides of the power housing 50. The minimum lateral distance D2 between the two power supply components 60 is less than the maximum lateral dimension W2 of the second support 52. The distance between two adjacent walls of the power supply components 60 is D2. In this embodiment, D2 is approximately 20mm. The smaller the distance, the more compactly the power supply components 60 are arranged on the power housing 50.

[0057] Please see Figure 4As shown, the power tool 100 includes a control assembly 70 (not shown) located within the power housing 50 and a main handle 30 connected to the connection assembly 20. The power housing 50 includes several vents 51 disposed near the control assembly 70. The vents 51 are located between the main handle 30 and the power supply assembly 60 along the first axis L1. The vents 51 are positioned near the control assembly 70 to dissipate heat from the control assembly 70. Specifically, the power supply assembly 60 is located between the vents 51 and the rear end face of the power housing 50. The power supply assembly 60 is also positioned near the vents 51 so that some airflow passes through the power supply assembly 60 to dissipate heat from the power supply assembly 60.

[0058] The power tool 100 is relatively stable when placed on a horizontal surface by setting a first support part 110 and a second support part 52 at the bottom of the front protective component 11 and the power housing 50; by setting a support part at the bottom of the power housing 50, the center of gravity of the whole machine is raised, which facilitates the improvement of the user's operating experience; and by reasonably arranging the position of the power supply component 60, the structure of the whole machine is compact.

[0059] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions for the lawnmower of this utility model can be derived without departing from the principles and scope of this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A power tool, comprising a connecting assembly extending along a first axis, a working assembly connected to a front end of the connecting assembly, a power housing located at a rear end of the connecting assembly, and a protective assembly connected to the connecting assembly or the working assembly; characterized in that: The protective assembly and the power housing include a support portion for supporting the power tool on a horizontal surface. When the power tool is placed on the horizontal surface, the first axis intersects the horizontal surface. The rear end face of the power housing has a transverse centerline perpendicular to the first axis, and the center of gravity of the power tool is located above the transverse centerline.

2. The power tool according to claim 1, characterized in that: The power tool includes a power supply assembly connected to the power housing along a second axis. When the power tool is placed on the horizontal surface, the power supply assembly is not in contact with the horizontal surface, and the center of gravity of the power tool after the power supply assembly is installed is located above the transverse center line.

3. The power tool according to claim 2, characterized in that: The support portion includes a first support portion located on the protective assembly and a second support portion located on the power housing. The maximum dimension of the first support portion in the lateral direction is greater than the maximum dimension of the second support portion in the lateral direction, and the shortest distance of the first support portion from the first axis is greater than the shortest distance of the second support portion from the first axis.

4. The power tool according to claim 3, characterized in that: The second support portion has a maximum lateral dimension smaller than the maximum lateral dimension of the power housing, and the second support portion is located below the power supply assembly in the vertical direction.

5. The power tool according to claim 4, characterized in that: The power supply components are symmetrically connected to the two lateral sides of the power housing, and the minimum distance between the two power supply components in the lateral direction is less than the maximum dimension of the second support in the lateral direction.

6. The power tool according to claim 5, characterized in that: The power housing includes a mounting portion for mounting the power supply component, a first sidewall located on the front side of the mounting portion, and a second sidewall located on the rear side of the mounting portion. After the power supply component is mounted to the mounting portion, the first sidewall and the second sidewall at least partially overlap with the side of the power supply component.

7. The power tool according to claim 6, characterized in that: The power housing includes a body connected to the connection assembly, a first sidewall and a second sidewall extending laterally from the body, the maximum dimension of the first sidewall in the lateral direction being greater than the maximum dimension of the second sidewall in the lateral direction.

8. The power tool according to claim 7, characterized in that: The power tool includes a control component located within the power housing. The rear end face of the power housing has a vertical centerline perpendicular to the transverse centerline, two first sidewalls symmetrically arranged on both sides of the vertical centerline, and a vent extending transversely through the first sidewalls. The two first sidewalls enclose a receiving cavity for accommodating the control component, and the vent is in fluid communication with the receiving cavity.

9. The power tool according to claim 1, characterized in that: The vertical distance between the projection point of the center of gravity on the rear end face of the power housing and the transverse centerline is 5%-15% of the maximum vertical dimension of the power housing.

10. The power tool according to claim 9, characterized in that: When the power tool is placed on the horizontal surface, the maximum vertical dimension of the protective assembly is greater than the maximum vertical dimension of the power housing.

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