Handheld electric tool

Abstract

A handheld electric tool comprises a machine shell, a motor, a gear transmission structure and an output shaft, the motor, the gear transmission structure and the output shaft are arranged in the machine shell, the gear transmission structure transmits power of the motor to the output shaft, and the handheld electric tool is characterized in that the machine shell comprises a main machine shell, an adjusting ring and a gear box cover located between the main machine shell and the adjusting ring; the gear box cover is fixed to the main machine shell so that the motor and the transmission mechanism can be fixed in the gear box cover, and the main machine shell and the gear box cover are both made of plastic.

Description

Technical Field

[0001] The utility model relates to the field of power tools, and particularly relates to a handheld power tool. Background Art

[0002] In recent years, with the development of technology, power tools are widely used in various fields. Especially for handheld power tools with impact function, taking an impact drill as an example, the material of the gearbox cover of the current impact drill is metal, with high cost. The gearbox cover is fixedly connected to the adjusting ring and the impact drill housing. During impact, the metal gearbox cover and the plastic impact drill housing vibrate greatly and the whole machine is heavier, which is not conducive to long-term use and greatly affects the work efficiency, bringing great troubles to users. Summary of the Utility Model

[0003] The purpose of this application is to overcome the deficiencies in the prior art, making the material of the gearbox cover the same as that of the power tool housing and both being plastic. When the power tool works, the vibration is reduced, the weight of the whole machine is smaller and the cost is reduced, providing a more economical and safe handheld power tool. The utility model is realized through the following technical solutions:

[0004] A handheld power tool (in this embodiment, the handheld power tool is an impact drill), including a housing, a motor arranged in the housing, a gear transmission structure and an output shaft. The gear transmission structure transmits the power of the motor to the output shaft. The housing includes a main housing, an adjusting ring and a gearbox cover located between the main housing and the adjusting ring. The gearbox cover is fixed to the main housing to fix the motor and the transmission mechanism therein. Both the main housing and the gearbox cover are made of plastic. The hardness of the plastic material is lower than that of the metal, so that the vibration between the front gearbox and the main housing of the handheld power tool during impact is reduced, the weight of the whole machine is smaller and the cost is reduced.

[0005] Further, the material of the main housing is the same as that of the gearbox cover.

[0006] Further, the main housing includes a convex portion, and the convex portion extends away from the motor along the motor shaft direction; the gearbox cover includes a concave portion that cooperates with the convex portion, and the cooperation of the convex and concave makes it difficult for the gearbox cover and the main housing to become loose.

[0007] Further, the adjusting ring includes a torque adjusting ring and a function adjusting ring, and the torque adjusting ring, the function adjusting ring and the gearbox cover are arranged in sequence along the motor shaft.

[0008] Further, the gearbox cover and the main housing are fixedly connected by screws, the extending direction of the screws is parallel to the motor shaft, and the screw connection part protrudes from the outer surface of the main housing.

[0009] Further, the main housing includes a rear cover and two half-shells. After the two half-shells are assembled, the rear cover is sleeved on the rear ends of the two half-shells away from the output shaft.

[0010] Further, the plastic is nylon.

[0011] The gearbox cover of the hand-held power tool is made of the same plastic material as the power tool housing. When the power tool is working, the vibration is reduced and the cost is lowered, providing a more economical and safe hand-held power tool with a smaller overall weight, making the operation more convenient and greatly improving the work efficiency. Description of the Drawings

[0012] Figure 1 It is a perspective view of a percussion drill according to an embodiment of the present application.

[0013] Figure 2 is Figure 1 a perspective view of the gearbox cover of the percussion drill shown.

[0014] Figure 3 is Figure 1 a partial sectional view of the percussion drill shown.

[0015] Figure 4 is Figure 1 a partial exploded view of the percussion drill shown. Detailed Description of the Embodiments

[0016] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

[0017] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the field to which this utility model belongs. The "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. "Plurality" or "several" means two or more. Unless otherwise indicated, the similar terms such as "front part", "rear part", "lower part" and / or "upper part" are for convenience of description only and are not limited to a position or a spatial orientation. The terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms of "a", "the" and "said" used in the specification and claims of this application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0018] Combined with Figures 1 to 4 , a hand-held power tool (in this embodiment, the hand-held power tool is an impact drill), comprising a housing, a motor 101 arranged in the housing, a gear transmission structure and an output shaft 102, the gear transmission structure transmitting the power of the motor 101 to the output shaft 102, the housing comprising a main housing 1, an adjusting ring 2 and a gearbox cover 3 located between the main housing 1 and the adjusting ring 2, the gearbox cover 3 being fixed to the main housing 1 to fix the motor 101 and the transmission mechanism therein, and both the main housing 1 and the gearbox cover 3 being made of plastic. The hardness of the plastic material is lower than that of metal, so that the vibration of the front gearbox and the main housing 1 during impact of the hand-held power tool is reduced, the overall weight of the whole machine is smaller and the cost is reduced, and the materials of the main housing 1 and the gearbox cover 3 are the same.

[0019] Preferably, the plastic is nylon.

[0020] Combined with Figures 2 to 4, the main housing 1 includes a convex portion 31 that extends away from the motor 101 along the axis of the motor 101; the gearbox cover 3 includes a concave portion 11 that mates with the convex portion 31, and the mating of the convex and concave portions makes it difficult for the gearbox cover 3 to become loose from the main housing 1. The adjustment ring 2 includes a torque adjustment ring 212 and a function adjustment ring 222, and the torque adjustment ring 212, the function adjustment ring 222, and the gearbox cover 3 are arranged in sequence along the axis of the motor 101.

[0021] The gearbox cover 3 and the main housing 1 are fixedly connected by screws 4, the extending direction of the screws 4 is parallel to the axis of the motor 101, and the connection part of the screws 4 protrudes from the outer surface of the main housing 1. The main housing 1 includes a rear cover 12 and two half-shells. After the two half-shells are assembled, the rear cover 12 is sleeved on the rear ends of the two half-shells away from the output shaft 102.

[0022] The gearbox cover 3 of the handheld power tool and the housing of the power tool are made of the same material, which is plastic. When the power tool is working, the vibration is reduced and the cost is reduced, providing a more economical and safe handheld power tool. The overall weight of the whole machine is smaller, making the operation more convenient and greatly improving the work efficiency.

[0023] It should be understood that the drawings illustrate the exemplary embodiments in detail, and it should be understood that the present application is not limited to the details or methods described in the specification or illustrated in the drawings. It should also be understood that the terms are for descriptive purposes only and should not be considered restrictive.

[0024] In view of this specification, further modifications and alternative embodiments of various aspects of the present invention will be apparent to those skilled in the art. Therefore, this description should be construed as merely illustrative. The configurations and arrangements shown in the various exemplary embodiments are merely illustrative. Although only some embodiments are described in detail in this disclosure, many modifications can be made (for example, variations in the size, dimensions, structure, shape and proportion of various elements, the values of parameters, the mounting arrangement, the use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. Some elements shown as integrally formed can be constructed of multiple parts or elements, the position of the elements can be reversed or otherwise changed, and the nature, number or position of the discrete elements can be changed or varied. According to alternative embodiments, the order or sequence of any process, logical algorithm or method step can be changed or reordered. Other substitutions, modifications, changes and omissions can also be made to the design, operating conditions and arrangements of the various exemplary embodiments without departing from the scope of the present invention.

[0025] Although the present application recites particular combinations of features in the appended claims, various embodiments of the invention relate to any combination of any of the features described herein, whether or not such combination is presently claimed, and any such combination of features may be claimed in this application or in a future application. Any feature, element, or component in any of the exemplary embodiments discussed above may be used alone or in combination with any feature, element, or component of any other exemplary embodiment discussed above.

[0026] In various exemplary embodiments, relative dimensions including angles, lengths, and radii, as shown in the figures, are drawn to scale. The actual measurements of the figures will disclose the relative dimensions, angles, and ratios of the various exemplary embodiments. The various exemplary embodiments extend to various ranges of absolute and relative dimensions, angles, and ratios that can be determined from the figures. The various exemplary embodiments include any combination of one or more relative dimensions or angles that can be determined from the figures. Additionally, actual dimensions not explicitly stated in this specification can be determined by using the ratio of the dimensions measured in the figures in combination with the explicit dimensions stated in this specification.

Claims

1. A handheld electric tool, comprising a housing, a motor disposed in the housing, a gear transmission structure and an output shaft, wherein the gear transmission structure transmits the power of the motor to the output shaft, characterized in that: The housing comprises a main housing, an adjusting ring and a gear box cover located between the main housing and the adjusting ring. The gear box cover is fixed to the main housing to fix the motor and the transmission mechanism therein. The main housing and the gear box cover are both made of plastic.

2. The handheld power tool according to claim 1, characterized in that: The material of the main housing is the same as that of the gear box cover.

3. The handheld power tool according to claim 1, characterized in that: The main housing includes a protrusion, which extends away from the motor along the motor shaft direction; the gear box cover includes a recessed portion that cooperates with the protrusion.

4. The handheld power tool according to claim 3, characterized in that: The adjusting ring comprises a torque adjusting ring and a function adjusting ring, and the torque adjusting ring, the function adjusting ring and the gear box cover are arranged in sequence along the motor shaft.

5. The handheld electric tool according to claim 3, characterized in that: The gear box cover is fixedly connected to the main housing by screws, and the extending direction of the screws is parallel to the motor shaft.

6. The handheld power tool according to claim 5, characterized in that: The main housing comprises a rear cover and two half shells. After the two half shells are assembled, the rear cover is sleeved on the rear ends of the two half shells away from the output shaft.

7. The handheld power tool according to claim 2, characterized in that: The plastic is nylon.

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