Power tool

Abstract

The utility model relates to an electric tool, include: work subassembly, casing and connect between work subassembly and casing connecting component, the casing includes the holding portion for user holds, and connecting component extends along the axial direction and at least partial extension into the casing, the part of connecting component extension into the casing includes the first connecting portion in the holding portion and the second connecting portion with the first connecting portion connects, in the radial direction perpendicular to the axial direction, the size of first connecting portion is less than the size of second connecting portion, the radial size of first connecting portion of the utility model is less than the radial size of second connecting portion, is favorable in reducing the size of holding portion and provides the sufficient wiring space.

Description

Technical Field

[0001] This utility model relates to an electric tool, and more particularly to an electric tool with a small grip size and sufficient internal wiring space. Background Technology

[0002] Currently, the rear handle of power tools on the market needs to accommodate on / off switches, main switch triggers, anti-locking switch triggers, springs, and wiring harnesses, which makes the arrangement of screws and wiring inside the rear handle quite difficult. Therefore, in order to improve the wiring space and screw arrangement, the size of the grip area needs to be increased, but this brings problems such as increased handle size leading to uncomfortable grip and increased cost.

[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 with a small grip size and sufficient internal wiring space.

[0005] The present invention solves the existing technical problems by adopting the following technical solution: an electric tool, comprising: a working component, a housing, and a connecting component connecting the working component and the housing, the housing including a grip portion for a user to hold, the connecting component extending axially and at least partially extending into the housing; the portion of the connecting component extending into the housing includes a first connecting portion located within the grip portion and a second connecting portion connected to the first connecting portion, wherein in the radial direction perpendicular to the axial direction, the size of the first connecting portion is smaller than the size of the second connecting portion.

[0006] A further improvement is that the connecting assembly further includes a third connecting portion for connecting the first connecting portion and the second connecting portion, wherein the dimension of the third connecting portion in the radial direction perpendicular to the axial direction gradually increases from the first connecting portion toward the second connecting portion.

[0007] A further improvement is as follows: the third connecting part includes a first part and a second part located at both ends of the first connecting part, wherein the length of the first part in the axial direction is the same as the length of the second part in the axial direction.

[0008] A further improvement is that the ratio of the total axial length of the first part and the second part to the axial length of the first connecting part is 1:2.

[0009] A further improvement is as follows: the power tool includes a trigger connected to the grip and an elastic member that elastically abuts against the trigger, with one end of the elastic member away from the trigger abutting against the first connecting portion.

[0010] A further improvement is that the power tool includes a switch located inside the housing and cooperating with the trigger, the switch being located below the second connection portion.

[0011] A further improvement is as follows: the power tool includes a power housing located at the rear end of the housing and a bellows connected between the power housing and the housing, the bellows being located below the second connection portion.

[0012] A further improvement is as follows: the power tool includes a control component located inside the power housing and a power supply component installed to the power housing. The power supply component, the switch, and the control component are electrically connected by a cable, and the cable passes at least partially through the corrugated pipe.

[0013] A further improvement is as follows: The power tool includes an operating component located on the front side of the grip, a power housing located on the rear side of the grip, and a control component located inside the power housing. The operating component is used to control the operating state of the motor and is electrically connected to the control component via a cable. The area between the first connecting part, the second connecting part, and the third connecting part and the housing constitutes a cable routing channel for the cable to pass through.

[0014] A further improvement is as follows: the gripping part includes several limiting grooves for fixing the cable, and the limiting grooves are formed by several ribs extending from the inner sidewall of the gripping part.

[0015] Compared with the prior art, the present invention has the following advantages: the radial dimension of the first connecting part of the present invention is smaller than the radial dimension of the second connecting part, which is beneficial to reducing the size of the gripping part and providing sufficient wiring space. 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 schematic diagram of the structure of the power tool of this utility model;

[0018] Figure 2 yes Figure 1 The diagram shows a partial exploded view of the power tools shown.

[0019] Figure 3 yes Figure 2 A magnified view of a portion of the casing shown.

[0020] Meaning of the reference numerals in the diagram:

[0021] 100 power tools, 10 working components

[0022] Connection component 20 First connection part 21

[0023] Second connecting part 22 Third connecting part 23

[0024] Part 1 231 Part 2 232

[0025] Main handle 30, housing 31

[0026] Grip 311 Receiving cavity 32

[0027] Operating component 33 Auxiliary handle 40

[0028] Trigger 50, Elastic element 51

[0029] Switch 52, Locking element 60

[0030] Power supply component 70 Power housing 71

[0031] Control component 80 Bellows 90

[0032] Cable 91 Limiting groove 92 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 see Figure 1As 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 located at the front end of the connecting component 20, and the working component 10 includes a cutting component, such as a grass cutter head or a brush cutter blade. The working component 10 also includes a motor for driving the cutting component and a fan assembly for cooling the motor. Both the motor and the fan assembly are located inside the front end head shell.

[0038] The connecting assembly 20 includes a first connecting pipe and a second connecting pipe. The connecting assembly 20 extends axially. The first connecting pipe is connected to the working assembly 10, and the second connecting pipe is 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 power tool 100.

[0039] The auxiliary handle 40 is located on the second connecting tube and close to the main handle 30. A horizontal protective bar is also fitted to the left side of the auxiliary handle 40 to prevent injury to the user during use. In this embodiment, the auxiliary handle 40 is designed as a D-shaped handle. The auxiliary handle 40 is fixed to the second connecting tube of the connecting assembly 20 by screws or other fasteners to assist the user in operation and reduce the user's workload.

[0040] Please see Figures 1 to 2 As shown, the power tool 100 of this utility model includes a working component 10, a housing 31, and a connecting component 20 connecting the working component 10 and the housing 31. The housing 31 includes a gripping part 311 for a user to hold, and the connecting component 20 extends axially and at least partially extends into the housing 31.

[0041] The second connecting tube of the connecting assembly 20 is connected to the main handle 30. Specifically, the second connecting tube extends at least partially into the housing 31 of the main handle 30. The portion of the connecting assembly 20 extending into the housing 31 includes a first connecting portion 21 located within the grip portion 311 and a second connecting portion 22 connected to the first connecting portion 21. In the radial direction perpendicular to the axial direction, the size of the first connecting portion 21 is smaller than the size of the second connecting portion 22. This design helps to reduce the size of the grip portion 311 and provides sufficient cable routing space.

[0042] The first connecting portion 21 is located within the gripping portion 311 and has a small radial dimension, which increases the space within the gripping portion 311, facilitating screw arrangement and wiring within the gripping portion 311. Specifically, the small radial dimension of the first connecting portion 21 increases the space on the upper and lower sides within the housing 31. Therefore, the screws within the housing 31 are distributed on the upper and lower sides of the first connecting portion 21, eliminating the need to install screws onto the first connecting portion 21, which facilitates uniform screw specifications. Furthermore, the increased vertical space of the first connecting portion 21 facilitates smooth wiring of the cable 91.

[0043] The connecting assembly 20 further includes a third connecting portion 23 for connecting the first connecting portion 21 and the second connecting portion 22, wherein the dimension of the third connecting portion 23 in the radial direction perpendicular to the axial direction gradually increases from the first connecting portion 21 toward the second connecting portion 22.

[0044] The third connecting portion 23 is located at both ends of the first connecting portion 21, that is, between the first connecting portion 21 and the second connecting portion 22. When viewed along the axial direction, the cross-section of the third connecting portion 23 is trapezoidal. The size of the third connecting portion 23 in the radial direction perpendicular to the axial direction gradually changes. The closer it is to the first connecting portion 21, the smaller the radial size of the third connecting portion 23. The minimum radial size of the third connecting portion 23 is equal to the radial size of the first connecting portion 21, and the maximum radial size of the third connecting portion 23 is equal to the radial size of the second connecting portion 22.

[0045] The third connecting portion 23 includes a first portion 231 and a second portion 232 located at both ends of the first connecting portion 21. The first portion 231 has the same axial length as the second portion 232 and both have the same shape, and both are connected between the first connecting portion 21 and the second connecting portion 22. The axial lengths of both the first portion 231 and the second portion 232 are less than the axial length of the first connecting portion 21.

[0046] The sum of the axial lengths of the first portion 231 and the second portion 232 is less than the axial length of the first connecting portion 21, and the ratio between the sum of the axial lengths of the first portion 231 and the second portion 232 and the axial length of the first connecting portion 21 is 1:2.

[0047] Specifically, in this embodiment, the first connecting part 21 has an axial length of 80mm, the first part 231 and the second part 232 each have an axial length of 20mm, and the total axial length of the third connecting part 23 is 40mm. Therefore, the ratio between the axial length of the third connecting part 23 and the axial length of the first connecting part 21 is 1:2.

[0048] The sum of the axial lengths of the first connecting portion 21 and the third connecting portion 23 is 120 mm. The first connecting portion 21 and the third connecting portion 23 together constitute a constricted tube portion. The ratio of the axial length of the third connecting portion 23 (i.e., the tapered portion) to the axial length of the constricted tube portion is 1:3. In other embodiments, the axial length of the constricted tube portion ranges from 50 to 200 mm, and the axial length of the first connecting portion 21 ranges from 50 to 180 mm.

[0049] The housing 31 includes a grip portion 311 for the user to hold, and the first connecting portion 21 is located inside the grip portion 311. Since the first connecting portion 21 has a radial dimension of 20mm and the second connecting portion 22 has a radial dimension of 25mm, the radial dimension of the first connecting portion 21 is smaller than the radial dimension of the second connecting portion 22, and the difference in size between the two is in the range of 1-8mm.

[0050] This design reduces the size of the grip portion 311 in both width and height directions. In this embodiment, the width of the cross-section of the grip portion 311 is 35mm and the height is 41mm. The size of the grip portion 311 is smaller than that of most similar products on the market, resulting in a more comfortable grip experience while also ensuring better structural strength and assembly reliability.

[0051] The grip portion 311 is smaller in width than in height. The lawnmower includes a trigger 50 connected to the grip portion 311 and an elastic member 51 that elastically abuts against the trigger 50. One end of the elastic member 51 away from the trigger 50 abuts against the first connecting portion 21.

[0052] An elastic element 51 is fixed to the trigger 50, and the elastic element 51 abuts against the first connecting part 21. The elastic element 51 is used to reset the trigger 50, and the elastic element 51 abuts against the first connecting part 21. Unlike the conventional method of fixing the elastic element 51 to the inner wall of the housing 31, this method helps to reduce the number of parts and save internal space of the housing.

[0053] The power tool 100 also includes a switch 52 located within the housing 31 and cooperating with the trigger 50. The switch 52 is located below the second connection portion 22. The trigger 50 includes a trigger end that cooperates with the switch 52. When the user operates the trigger 50, the switch 52 is triggered, and the power tool 100 is in the start state.

[0054] The power tool 100 also includes a locking member 60 located on the side of the housing 31. The locking member 60 cooperates with the trigger 50 to realize the dual-action start of the power tool 100. That is, when the user needs to start the machine, he / she must first operate the locking member 60 so that the trigger 50 is in the unlocked position before it can be pressed to start the machine.

[0055] The interlocking structure between the trigger 50 and the locking member 60 is mechanical. That is, the part of the trigger 50 located inside the housing 31 has a rib that cooperates with the rib of the locking member 60 located inside the housing 31 to achieve interlocking between the trigger 50 and the locking member 60. The design of the dual-action start structure helps to ensure user safety.

[0056] The trigger 50 is located below the housing 31 and at least partially protrudes from the housing 31. The locking member 60 is located on the side of the housing 31 and is disposed close to the trigger 50. The trigger 50 is used by the user to operate and start the machine, and the locking member 60 is used to restrict the movement of the trigger 50 to prevent the user from accidentally triggering the trigger 50 during use and causing the machine to start unexpectedly.

[0057] When a user uses the power tool 100, the locking member 60 must first release the lock on the trigger 50 before the machine can be started to ensure user safety. In this embodiment, the locking member 60 and the trigger 50 are mechanically self-locking, and the locking member 60 is a push-button structure. In other embodiments, the locking member 60 may be a sliding structure, typically located near the switch trigger. In this invention, the locking form of the locking member 60 is not limited; that is, any structure that can lock the trigger 50 falls within the protection scope of this invention.

[0058] The power tool 100 includes a power housing 71 located at the rear end of the housing 31 and a bellows 90 connected between the power housing 71 and the housing 31. The bellows 90 is located below the second connecting portion 22.

[0059] The power tool 100 includes a control component 80 located within the power housing 71 and a power supply component 70 installed on the power housing 71. The power supply component 70, the switch 52, and the control component 80 are electrically connected via a cable 91, which at least partially passes through the corrugated pipe 90.

[0060] The power supply component 70 is disposed close to the control component 80. Specifically, the electrode holder of the power supply component 70 is disposed close to the control component 80, so as to facilitate the electrical connection of the power supply component 70 and the control component 80 through the cable 91.

[0061] The second connecting portion 22 extends at least partially into the power housing 71, and the corrugated tube 90 is connected between the power housing 71 and the housing 31 of the main handle 30. That is, one end of the corrugated tube 90 is fixed to the housing 31 of the main handle 30 by screws, and the other end is fixed to the interior of the power housing 71. The remaining part of the corrugated tube 90 is exposed outside the housing 31 and the power housing 71. The corrugated tube 90 is configured as a flexible tubular element with transverse corrugations. Its tube wall is annular or spiral corrugated, which has good flexibility, extensibility and deformation resistance. It is mainly used for the cable 91 to pass through to connect to the control component 80.

[0062] The control component 80 is located close to the electrode base, facilitating the connection of the power supply component 70 to the control component 80. The switch 52 is electrically connected to the control component 80 via the cable 91, which at least partially passes through the bellows 90. Specifically, the cable 91 passes through the interior of the housing 31 of the main handle 30 and the bellows 90 to connect to the control component 80.

[0063] The power tool 100 includes an operating component 33 located on the front side of the grip 311, a power housing 71 located on the rear side of the grip 311, and a control component 80 located inside the power housing 71. The operating component 33 is used to control the operating state of the motor and is electrically connected to the control component 80 via a cable 91.

[0064] The operating component 33 may be at least one of a control panel, knob, or push button located on the top side of the housing 31. The user controls the operating state of the motor by operating the operating component 33. The operating state of the motor includes starting, stopping, speed adjustment, and constant speed. In this embodiment, the operating component 33 is used to adjust the speed of the motor, while the trigger 50 is used to control the start and stop of the motor. In other embodiments, the operating component 33 may be used to control the start and stop of the motor and its speed.

[0065] The areas between the first connecting portion 21, the second connecting portion 22, and the third connecting portion 23 and the housing 31 constitute a routing channel for the cable 91 to pass through. The first connecting portion 21 has a small radial dimension, therefore, the space on the upper and lower sides of the first connecting portion 21 within the housing 31 is relatively large, making the routing of the cable 91 within the space smoother.

[0066] The cable 91 extends from one end of the switch 52 and passes through the space above the second connection portion 22 from bottom to top. It then extends from the space above the second connection portion 22 to the space above the first connection portion 21 and the third connection portion 23. Subsequently, it connects from top to bottom to the bellows 90 from the space above the second connection portion 22 near the power housing 71. The cable 91 passes through the bellows 90 and connects to the control component 80 to achieve an electrical connection between the switch 52 and the control component 80.

[0067] A first wiring channel is provided above the first connecting part 21, and a second wiring channel is provided above the second connecting part 22 and the third connecting part 23. Since the radial dimension of the first connecting part 21 is smaller than the radial dimension of the second connecting part 22, the distance between the first connecting part 21 and the inner wall of the housing 31 is greater than the distance between the second connecting part 22 and the inner wall of the housing 31. That is, the radial dimension of the first wiring channel is greater than the radial dimension of the second wiring channel. Therefore, the cable 91 is located in the first wiring channel and the wiring is smoother.

[0068] The gripping part 311 includes several limiting grooves 92 for fixing the cable 91. The limiting grooves 92 are formed by several ribs extending from the inner sidewall of the gripping part 311. That is, the limiting grooves 92 are provided in the first cable routing channel, and the limiting grooves 92 are located above the first connecting part 21 and the third connecting part 23.

[0069] Viewed along the axial direction, the distance between the first connecting part 21 and the third connecting part 23 and the top of the inner wall of the housing 31 is relatively large. Therefore, in this embodiment, the limiting groove 92 is provided in the space above the first connecting part 21 and the third connecting part 23 to fix the cable 91, so that the cable 91 will not be distributed messily in the housing 31, which is beneficial to the wiring in the internal space of the housing 31.

[0070] The main handle 30 of this utility model features an aluminum tube portion with a tapered size structure, known as a "tube reduction" process. This tube reduction significantly improves the rationality of screw post arrangement in the grip area, ensuring uniform screw specifications. It also provides more ample space for cable routing. Furthermore, the design of a surface-contact cable routing groove greatly reduces the risk of cable compression.

[0071] In this invention, the radial dimension of the first connecting portion 21 located within the grip is smaller than the radial dimension of the second connecting portion 22, which helps to reduce the size of the grip and ensures smooth wiring within the internal space. Specifically, the radial dimension of the second connecting portion 22 in this invention is 25mm, and the radial dimension of the first connecting portion 21 is 20mm.

[0072] The overall length of the reduced-tube section, i.e., the axial length of the first connecting part 21 and the third connecting part 23, is 120 mm. Specifically, the axial length of the first connecting part 21 is 80 mm, accounting for 66.7% of the overall reduced-tube length; and the axial length of the third connecting part 23 is 40 mm, accounting for 33.3% of the overall reduced-tube length. By designing the third connecting part 23 to connect the first connecting part 21 and the second connecting part 22, this design avoids abrupt changes in the size of the connecting assembly 20, effectively reducing stress concentration and ensuring a certain structural strength.

[0073] The gripping part of this invention has an irregular cross-section in the radial direction, and the gripping part has a width dimension of 35mm, which is larger than the radial dimensions of the first connecting part 21, the second connecting part 22 and the third connecting part 23.

[0074] The grip portion has a height dimension of 41mm, which is larger than its width dimension. The smaller width dimension of the grip portion allows for easier and more effortless handling of the power tool 100. Furthermore, the grip portion is smaller than the grip size of most similar products on the market, resulting in a more comfortable grip experience. This design also ensures good structural strength and assembly reliability.

[0075] In this invention, the first connecting part 21 within the grip portion has a radial dimension smaller than the dimension of the rest of the connecting assembly 20, allowing the user to easily grip the main handle 30 when holding the grip portion. This design is ergonomic.

[0076] This utility model is not limited to the specific embodiments described above. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Those skilled in the art will readily understand that any modifications or changes made to the above embodiments without departing from the spirit and scope of this utility model should still be covered by the claims of this utility model. There are many alternatives to the long-handled power tools of this utility model. The scope of protection of this utility model is determined by the claims.

Claims

1. An electric tool, comprising: A working component, a housing, and a connecting component connecting the working component and the housing, the housing including a grip for a user to hold, the connecting component extending axially and at least partially into the housing; characterized in that: the portion of the connecting component extending into the housing includes a first connecting portion located within the grip and a second connecting portion connected to the first connecting portion, wherein the size of the first connecting portion is smaller than the size of the second connecting portion in a radial direction perpendicular to the axial direction.

2. The power tool according to claim 1, characterized in that: The connecting assembly includes a third connecting portion for connecting the first connecting portion and the second connecting portion, wherein the dimension of the third connecting portion in the radial direction perpendicular to the axial direction gradually increases from the first connecting portion toward the second connecting portion.

3. The power tool according to claim 2, characterized in that: The third connecting portion includes a first part and a second part located at both ends of the first connecting portion, wherein the length of the first part in the axial direction is the same as the length of the second part in the axial direction.

4. The power tool according to claim 3, characterized in that: The ratio of the total axial length of the first part and the second part to the axial length of the first connecting part is 1:

2.

5. The power tool according to claim 1, characterized in that: The power tool includes a trigger connected to the grip and an elastic member that elastically abuts against the trigger, with one end of the elastic member away from the trigger abutting against the first connecting portion.

6. The power tool according to claim 5, characterized in that: The power tool includes a switch located within the housing and cooperating with the trigger, the switch being located below the second connection portion.

7. The power tool according to claim 6, characterized in that: The power tool includes a power housing located at the rear end of the housing and a bellows connecting the power housing and the housing, the bellows being located below the second connection portion.

8. The power tool according to claim 7, characterized in that: The power tool includes a control component located within the power housing and a power supply component mounted to the power housing. The power supply component, the switch, and the control component are electrically connected via a cable, which at least partially passes through the corrugated pipe.

9. The power tool according to claim 2, characterized in that: The power tool includes an operating component located on the front side of the grip, a power housing located on the rear side of the grip, and a control component located within the power housing. The operating component is used to control the operating state of the motor and is electrically connected to the control component via a cable. The area between the first connecting part, the second connecting part, and the third connecting part and the housing constitutes a cable routing channel through which the cable passes.

10. The power tool according to claim 9, characterized in that: The gripping part includes several limiting grooves for fixing the cable, and the limiting grooves are formed by several ribs extending from the inner sidewall of the gripping part.

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